chore: bump version to 0.15.2

2026-08-15 14:02:04 +02:00 · 2026-08-03 19:06:49 +00:00
37 changed files with 329 additions and 1937 deletions
@@ -260,13 +260,13 @@ The base classes handle most work automatically. Override only when the agent de
 | Override | When to use | Example |
 |---|---|---|
 | `command_filename(template_name)` | Custom file naming or extension | Copilot → `speckit.{name}.agent.md` |
-| `options()` | Integration-specific CLI flags via `--integration-options` | Codex → `--skills` flag, Copilot → `--commands` flag |
-| `setup()` | Custom install logic (companion files, settings merge) | Copilot → `speckit-<name>/SKILL.md` (default) or `.agent.md` + `.prompt.md` + `.vscode/settings.json` (`--commands`) |
+| `options()` | Integration-specific CLI flags via `--integration-options` | Codex → `--skills` flag, Copilot → `--skills` flag |
+| `setup()` | Custom install logic (companion files, settings merge) | Copilot → `.agent.md` + `.prompt.md` + `.vscode/settings.json` (default) or `speckit-<name>/SKILL.md` (skills mode) |
 | `teardown()` | Custom uninstall logic | Rarely needed; base handles manifest-tracked files |

 **Example — Copilot (fully custom `setup`):**

-Copilot extends `IntegrationBase` directly because it supports two layouts. It scaffolds `speckit-<name>/SKILL.md` under `.github/skills/` by default using composition with an internal `_CopilotSkillsHelper`. Its `--commands` mode creates `.agent.md` commands, companion `.prompt.md` files, and merges `.vscode/settings.json`. See `src/specify_cli/integrations/copilot/__init__.py` for the full implementation.
+Copilot extends `IntegrationBase` directly because it creates `.agent.md` commands, companion `.prompt.md` files, and merges `.vscode/settings.json`. It also supports a `--skills` mode that scaffolds `speckit-<name>/SKILL.md` under `.github/skills/` using composition with an internal `_CopilotSkillsHelper`. See `src/specify_cli/integrations/copilot/__init__.py` for the full implementation.

 ### 7. Update Devcontainer files (Optional)

@@ -415,28 +415,36 @@ Some agents require custom processing beyond the standard template transformatio

 ### Copilot Integration

-GitHub Copilot uses skills by default, scaffolded as
-`speckit-<name>/SKILL.md` under `.github/skills/`.
+GitHub Copilot has unique requirements:

-**Commands mode (`--commands`):** Copilot also supports a commands-based layout
-via `--integration-options="--commands"`. When enabled:
-
- Commands use `.agent.md` extension under `.github/agents/`
+- Commands use `.agent.md` extension (not `.md`)
 - Each command gets a companion `.prompt.md` file in `.github/prompts/`
- `.vscode/settings.json` is merged with prompt file recommendations
- `build_command_invocation()` returns bare args for `--agent` dispatch
+- Installs `.vscode/settings.json` with prompt file recommendations
+- Context file lives at `.github/copilot-instructions.md`

-In the default skills mode, no companion prompts or VS Code settings merge are
-created, and `build_command_invocation()` returns `/speckit-<stem>`.
+Implementation: Extends `IntegrationBase` with custom `setup()` method that:
+
+1. Processes templates with `process_template()`
+2. Generates companion `.prompt.md` files
+3. Merges VS Code settings
+
+**Skills mode (`--skills`):** Copilot also supports an alternative skills-based layout
+via `--integration-options="--skills"`. When enabled:
+
+- Commands are scaffolded as `speckit-<name>/SKILL.md` under `.github/skills/`
+- No companion `.prompt.md` files are generated
+- No `.vscode/settings.json` merge
+- `post_process_skill_content()` injects a `mode: speckit.<stem>` frontmatter field
+- `build_command_invocation()` returns `/speckit-<stem>` instead of bare args

 The two modes are mutually exclusive — a project uses one or the other:

 ```bash
-# Default skills mode: speckit-<name>/SKILL.md under .github/skills/
+# Default mode: .agent.md agents + .prompt.md companions + settings merge
 specify init my-project --integration copilot

-# Commands mode: .agent.md agents + .prompt.md companions + settings merge
-specify init my-project --integration copilot --integration-options="--commands"
+# Skills mode: speckit-<name>/SKILL.md under .github/skills/
+specify init my-project --integration copilot --integration-options="--skills"
 ```

 ### Forge Integration
@@ -501,11 +509,6 @@ When an issue exists, include its number immediately after the prefix — this i

 Disclosure is **continuous**, not a one-time event. A single AI-disclosure paragraph in the PR body does **not** cover the commits and replies you add during review rounds. Each of the following must independently attest to agent authorship.

-### Opening pull requests
-
- Before opening a pull request, check whether the account that will file it already has three open pull requests in this repository.
- If so, alert the user that additional submissions may receive lower review priority and ask for explicit permission to proceed. Do not assume consent.
-
 ### Commits

 - **Every commit you author must carry an `Assisted-by:` trailer** identifying the agent and whether it acted autonomously or under direct human supervision, for example:
@@ -2,31 +2,6 @@

 <!-- insert new changelog below this comment -->

-## [0.16.0] - 2026-08-05
-
-### Changed
-
- fix: keep long frontmatter values on a single line (#3989)
- fix: skip corrupted run state files in list_runs (#3817)
- fix: skip corrupted run state files in list_runs (#3814)
- Add July 2026 newsletter (#3987)
- fix(presets): start fresh on a non-UTF-8 preset registry (#3955)
- docs: clarify agent PR review prioritization (#3985)
- fix(events): preserve a non-UTF-8 config.toml on hook install/teardown (#3963)
- fix(extensions): treat an unreadable staged backup as a conflict (#3962)
- fix(manifests): reject non-string requires.speckit_version (#3980)
- fix(extensions): reject reinstall when a kept config cannot be read (#3960)
- [extension] Update Charter extension to v0.5.1 (#3983)
- fix(events): return None for an unparseable script command (#3957)
- feat(events): context injection for opencode and JSON-envelope agent hooks (#3934)
- Add TDD Extension to community catalog (#3982)
- Update Archive Extension to v1.1.0 (#3981)
- feat(copilot): default integration to skills (#3976)
- fix(events): ignore non-UTF-8 event overrides (#3897)
- fix: cap stdin read at 1 MiB to prevent DoS (#3857)
- fix(workflows): reject mismatched run state IDs (#3899)
- chore: release 0.15.2, begin 0.15.3.dev0 development (#3953)
-
 ## [0.15.2] - 2026-08-03

 ### Changed
@@ -55,8 +55,6 @@ Here are a few things you can do that will increase the likelihood of your pull
 - Write a [good commit message](http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html).
 - Test your changes with the Spec-Driven Development workflow to ensure compatibility.

-Accounts with three open pull requests may continue submitting changes, but additional submissions may be placed behind contributions from other authors in the review queue. Coding agents should disclose this possibility and obtain the filer's confirmation before opening another pull request.
-
 ### Branch naming

 We recommend naming branches as `<type>/<number>-<short-slug>`, where `<number>` is the issue or PR number (whichever comes first) and `<type>` is one of:
@@ -153,7 +153,6 @@ The following community-contributed extensions are available in [`catalog.commun
 | Superpowers Implementation Bridge | Thin orchestrator between Spec Kit (design) and Superpowers (implementation). Cross-agent. | `process` | Read+Write | [speckit-superpowers-bridge](https://github.com/lihan3238/speckit-superpowers-bridge) |
 | Superspec | Bridges spec-kit with obra/superpowers (brainstorming, TDD, subagent, code-review) into a unified, resumable workflow with graceful degradation and session progress tracking | `process` | Read+Write | [superspec](https://github.com/WangX0111/superspec) |
 | Tasks to GitHub Project | Publish and synchronize Spec Kit tasks as cards on a GitHub Project (v2) kanban board, with priority and status sync between spec.md/tasks.md and the board. | `integration` | Read+Write | [spec-kit-tasks-to-project](https://github.com/mancioshell/spec-kit-tasks-to-project) |
-| TDD Extension | Drives spec-kit implementation with tests: a language-agnostic red-green-refactor loop with a per-feature test list, recorded red and green evidence, and mutation-checked test strength. | `process` | Read+Write | [spec-kit-tdd](https://github.com/d0whc3r/spec-kit-tdd) |
 | Team Assign | Assign tasks.md items to human engineers, split into subtasks, and generate a per-engineer workboard | `process` | Read+Write | [spec-kit-team-assign](https://github.com/tarunkumarbhati/spec-kit-team-assign) |
 | Test Coverage Drift Control | Generate incremental coverage drift reports and planned remediation tasks after implementation | `code` | Read+Write | [spec-kit-test-coverage-drift-control](https://github.com/benizzio/spec-kit-test-coverage-drift-control) |
 | Time Machine | Retroactively apply the full SDD workflow to existing codebases — analyse, spec, and ship feature-by-feature | `process` | Read+Write | [spec-kit-time-machine](https://github.com/teeyo/spec-kit-time-machine) |
@@ -20,7 +20,7 @@ The Specify CLI supports a wide range of AI coding agents. When you run `specify
 | [Firebender](https://firebender.com/)                                                | `firebender`     | IDE-based agent for Android Studio / IntelliJ                                                                                             |
 | [Forge](https://forgecode.dev/)                                                      | `forge`          |                                                                                                                                           |
 | [Gemini CLI](https://github.com/google-gemini/gemini-cli)                            | `gemini`         |                                                                                                                                           |
-| [GitHub Copilot](https://code.visualstudio.com/)                                     | `copilot`        | Skills-based by default; installs `speckit-<command>/SKILL.md` under `.github/skills/`. Pass `--integration-options="--commands"` to use the supported commands layout: `.agent.md` files under `.github/agents/`, companion `.prompt.md` files under `.github/prompts/`, and a `.vscode/settings.json` merge. |
+| [GitHub Copilot](https://code.visualstudio.com/)                                     | `copilot`        | Defaults to legacy markdown mode: `.agent.md` command files under `.github/agents/`, companion `.prompt.md` files under `.github/prompts/`, and a `.vscode/settings.json` merge. Pass `--integration-options="--skills"` to scaffold skills as `speckit-<command>/SKILL.md` under `.github/skills/` instead. Legacy markdown mode is deprecated and will stop being the default in a future release. |
 | [Goose](https://goose-docs.ai/)                                                      | `goose`          | Uses YAML recipe format in `.goose/recipes/`                                                                                              |
 | [Grok Build](https://docs.x.ai/build/overview)                                       | `grok`           | Skills-based integration; installs skills into `.grok/skills` and invokes them as `/speckit-<command>`                                    |
 | [Hermes](https://github.com/NousResearch/hermes-agent)                               | `hermes`         | Skills-based integration; installs skills globally into `~/.hermes/skills/`                                                                |
@@ -234,8 +234,7 @@ Some integrations accept additional options via `--integration-options`:
 | ----------- | ------------------- | -------------------------------------------------------------- |
 | `generic`   | `--commands-dir`    | Required. Directory for command files                          |
 | `kimi`      | `--migrate-legacy`  | Migrate legacy `.kimi/skills/` installs to `.kimi-code/skills/` (including dotted→hyphenated skill naming, e.g. `speckit.xxx` → `speckit-xxx`) |
-| `copilot`   | `--commands`        | Scaffold `.github/agents/*.agent.md` commands with `.github/prompts/*.prompt.md` companions and merge `.vscode/settings.json` instead of using the default skills layout. |
-| `copilot`   | `--skills`          | Force the default skills layout, overriding an existing commands layout during an explicit migration. |
+| `copilot`   | `--skills`          | Scaffold commands as agent skills (`speckit-<command>/SKILL.md` under `.github/skills/`, invoked as `/speckit-<command>`) instead of the default legacy markdown mode (`.github/agents/*.agent.md` plus `.github/prompts/*.prompt.md` and a `.vscode/settings.json` merge). Without this flag, install warns that legacy markdown mode is deprecated. |

 Example:

@@ -1,6 +1,6 @@
 {
  "schema_version": "1.0",
-  "updated_at": "2026-08-04T00:00:00Z",
+  "updated_at": "2026-08-03T00:00:00Z",
  "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.community.json",
  "extensions": {
    "adrkit": {
@@ -362,8 +362,8 @@
      "id": "archive",
      "description": "Archive merged features into main project memory, resolving gaps and conflicts.",
      "author": "Stanislav Deviatov",
-      "version": "1.1.0",
-      "download_url": "https://github.com/stn1slv/spec-kit-archive/archive/refs/tags/v1.1.0.zip",
+      "version": "1.0.0",
+      "download_url": "https://github.com/stn1slv/spec-kit-archive/archive/refs/tags/v1.0.0.zip",
      "repository": "https://github.com/stn1slv/spec-kit-archive",
      "homepage": "https://github.com/stn1slv/spec-kit-archive",
      "documentation": "https://github.com/stn1slv/spec-kit-archive/blob/main/README.md",
@@ -388,7 +388,7 @@
      "downloads": 0,
      "stars": 0,
      "created_at": "2026-03-14T00:00:00Z",
-      "updated_at": "2026-08-04T00:00:00Z"
+      "updated_at": "2026-03-14T00:00:00Z"
    },
    "azure-devops": {
      "name": "Azure DevOps Integration",
@@ -811,8 +811,8 @@
      "id": "charter",
      "description": "Compose modular project constitutions from shared fragment registries. Centralize governance rules, select per-project fragments, track upstream changes, and keep multi-project setups consistent.",
      "author": "Fyloss",
-      "version": "0.5.1",
-      "download_url": "https://github.com/Fyloss/spec-kit-charter/archive/refs/tags/v0.5.1.zip",
+      "version": "0.3.1",
+      "download_url": "https://github.com/Fyloss/spec-kit-charter/archive/refs/tags/v0.3.1.zip",
      "repository": "https://github.com/Fyloss/spec-kit-charter",
      "homepage": "https://github.com/Fyloss/spec-kit-charter",
      "documentation": "https://github.com/Fyloss/spec-kit-charter/tree/master/docs",
@@ -821,8 +821,7 @@
      "category": "process",
      "effect": "read-write",
      "requires": {
-        "speckit_version": ">=0.11.9",
-        "tools": [{ "name": "git", "required": false }]
+        "speckit_version": ">=0.11.9"
      },
      "provides": {
        "commands": 5,
@@ -839,7 +838,7 @@
      "downloads": 0,
      "stars": 0,
      "created_at": "2026-07-06T00:00:00Z",
-      "updated_at": "2026-08-04T00:00:00Z"
+      "updated_at": "2026-07-06T00:00:00Z"
    },
    "ci-guard": {
      "name": "CI Guard",
@@ -4489,47 +4488,6 @@
      "created_at": "2026-06-22T00:00:00Z",
      "updated_at": "2026-06-22T00:00:00Z"
    },
-    "tdd": {
-      "name": "TDD Extension",
-      "id": "tdd",
-      "description": "Drives spec-kit implementation with tests: a language-agnostic red-green-refactor loop with a per-feature test list, recorded red and green evidence, and mutation-checked test strength.",
-      "author": "d0whc3r",
-      "version": "1.1.2",
-      "download_url": "https://github.com/d0whc3r/spec-kit-tdd/releases/download/v1.1.2/tdd-1.1.2.zip",
-      "repository": "https://github.com/d0whc3r/spec-kit-tdd",
-      "homepage": "https://d0whc3r.github.io/spec-kit-tdd/",
-      "documentation": "https://github.com/d0whc3r/spec-kit-tdd/wiki",
-      "changelog": "https://github.com/d0whc3r/spec-kit-tdd/blob/main/CHANGELOG.md",
-      "license": "MIT",
-      "category": "process",
-      "effect": "read-write",
-      "requires": {
-        "speckit_version": ">=0.11.9"
-      },
-      "provides": {
-        "commands": 4,
-        "hooks": 3
-      },
-      "tags": [
-        "acceptance-tests",
-        "mutation-testing",
-        "property-based-testing",
-        "quality",
-        "red-green-refactor",
-        "spec-kit",
-        "spec-kit-extension",
-        "tdd",
-        "test-driven-development",
-        "test-first",
-        "testing",
-        "unit-tests"
-      ],
-      "verified": false,
-      "downloads": 0,
-      "stars": 0,
-      "created_at": "2026-08-04T00:00:00Z",
-      "updated_at": "2026-08-04T00:00:00Z"
-    },
    "team-assign": {
      "name": "Team Assign",
      "id": "team-assign",
@@ -4,7 +4,7 @@ This edition covers Spec Kit activity in April 2026. Seventeen releases shipped

 | **Spec Kit Core (Apr 2026)** | **Community & Content** | **SDD Ecosystem & Next** |
 | --- | --- | --- |
-| Seventeen releases shipped with major features: integration plugin architecture, workflow engine, preset composition, integration catalog, bundled lean preset, documentation site, and academic citation support. Three new agents added (Forgecode, Goose, Devin for Terminal). The repo grew from ~82k to **92,038 stars**. [\[github.com\]](https://github.com/github/spec-kit/releases) | Thoughtworks Technology Radar placed Spec Kit in the "Assess" ring. Community catalog grew from 26 to **83 extensions** and from 2 to **12 presets**. External coverage continued across developer blogs and industry press. XB Software documented a real legacy project. Fabián Silva shipped the Caramelo VS Code extension. | Matt Rickard argued for "smaller specs, harder checks." Will Torber's three-framework comparison recommended OpenSpec for most teams. The "Spec Layer" debate emerged: specs as constraint surfaces for AI agents. Spec Kit leads in breadth and portability; competitors differentiate on drift detection and orchestration depth. |
+| Seventeen releases shipped with major features: integration plugin architecture, workflow engine, preset composition, integration catalog, bundled lean preset, documentation site, and academic citation support. Three new agents added (Forgecode, Goose, Devin for Terminal). The repo grew from ~82k to **92,038 stars**. [\[github.com\]](https://github.com/github/spec-kit/releases) | Thoughtworks Technology Radar placed Spec Kit in the "Assess" ring. Community catalog grew from 26 to **83 extensions** and from 2 to **12 presets**. 12 substantive external articles published. XB Software documented a real legacy project. Fabián Silva shipped the Caramelo VS Code extension. | Matt Rickard argued for "smaller specs, harder checks." Will Torber's three-framework comparison recommended OpenSpec for most teams. The "Spec Layer" debate emerged: specs as constraint surfaces for AI agents. Spec Kit leads in breadth and portability; competitors differentiate on drift detection and orchestration depth. |

 ***

@@ -94,7 +94,7 @@ On **April 15**, the **Thoughtworks Technology Radar Volume 34** placed GitHub S

 ### Developer Articles and Blog Posts

-April produced a steady stream of external articles.
+April produced 12 substantive external articles (plus one excluded as AI-generated SEO spam).

 **Matt Rickard** published *"The Spec Layer: Why Spec-Driven Development (SDD) Works"* on April 1. His thesis: specs reduce execution freedom for AI agents, functioning as constraint surfaces. He compared Spec Kit, Kiro, OpenSpec, Tessl, Intent, and Symphony, and advocated for **"smaller specs, harder checks, less guessing."** [\[blog.matt-rickard.com\]](https://blog.matt-rickard.com/p/the-spec-layer)

@@ -1,152 +0,0 @@
-# Spec Kit - July 2026 Newsletter
-
-This edition covers Spec Kit activity in July 2026 — a month of hardening and expanding the envelope. Twenty-eight releases shipped (v0.12.3 through v0.15.1), crossing three minor bumps and delivering three headline capabilities: the **`assess` "Idea Assessment Pipeline" extension**, which pushes spec-driven development *upstream* of the spec to answer "should we even build this?"; the new **`py` (Python) script type** and the broad shell→Python port that underpins it; and a **first-class agent-native runtime events layer** for integrations. Beneath the features, the month's dominant engineering theme was a sustained **security-hardening wave** — bounded HTTP reads, strict redirect validation, TOCTOU-race elimination, and defensive validation across the workflow engine. Externally, coverage broadened structurally: mainstream tech press (heise online) covered the v0.13 `assess` release in two languages, and a **companion-tooling ecosystem** bloomed around the project — spec↔code drift detectors, model-sizing advisors, and testing-gap tools all built *on top of* Spec Kit. A summary is in the table below, followed by details.
-
-| **Spec Kit Core (Jul 2026)** | **Community & Content** | **SDD Ecosystem & Next** |
-| --- | --- | --- |
-| Twenty-eight releases shipped (v0.12.3–v0.15.1), crossing v0.13, v0.14, and v0.15. Headline features: the `assess` **Idea Assessment Pipeline** extension (capture→evidence→refine→design→go/clarify/kill), the new **`py` script type** plus a shell→Python port of the core scripts, git extension, and agent-context updater, and an **agent-native runtime events layer** for integrations. Three agents joined (Grok Build, Factory Droid CLI, Alquimia AI), the label-driven **bug-fix/bug-test** automation completed the triage pipeline, and a heavy **security-hardening** wave landed. The repo grew from ~117,400 to **124,655 stars**. [\[github.com\]](https://github.com/github/spec-kit/releases) | The community extension catalog grew from 125 to **144 entries**; presets reached **29**, community workflows **2**, bundles **1**. **heise online** covered the v0.13 `assess` release in English and German. Coverage shifted toward comparisons, companion tooling, and "who verifies the spec?" critiques. **~258 contributors** now listed. | A **companion-tooling ecosystem** emerged — artgraph (deterministic spec↔code drift), SpecJudge (model right-sizing), GAUNTLEX (security-testing gap), and custom skills like `speckit-next` and `prefill`. Comparisons increasingly pit Spec Kit against Kiro; balanced reviews keep flagging documentation proliferation and cognitive load, precisely the gaps the `assess` upstream step and the drift/companion ecosystem are built to close. |
-
-***
-
-> **Hardening the Foundation, Expanding the Envelope.** If June was defined by external validation, July was defined by internal consolidation and reach. No single release carried the weight of `converge` or `bundle`, but the month moved the project in two directions at once. It reached *upstream* — the new `assess` pipeline lets a team evaluate an idea (capture evidence, refine, design, then go/clarify/kill) *before* a spec exists, extending SDD past the spec into the decision to build. And it reached *down to the metal* — a new `py` script type and a systematic port of the core scripts, git extension, and agent-context updater from shell to Python, alongside a security-hardening wave that bounded every HTTP read, validated every redirect hop, eliminated file-race conditions, and taught the workflow engine to fail loudly instead of crashing on malformed input. Meanwhile the ecosystem answered the project's most-cited critique — "who verifies the spec, and who reads all this documentation?" — not with complaints but with *code*: a wave of companion tools built directly on Spec Kit artifacts. None of this happens without the community — the contributors, extension and preset authors, bundle builders, agent-integration maintainers, and practitioners writing in more than 20 languages. Thank you.
-
-## Spec Kit Project Updates
-
-### Releases Overview
-
-**v0.12.3–v0.12.18** (July 1–17) was the month's longest patch run and carried two features amid heavy hardening. The **`py` script type** landed (#3285), adding Python interpreter resolution alongside the existing `sh`/`ps` options, and the **label-driven bug-fix (#3258) and bug-test (#3239) agentic workflows** completed the `bug-assess → bug-test → bug-fix` triage pipeline. The systematic shell→Python port began here: the **`update-agent-context` script** (#3387), the **git extension scripts** (#3400), and a **`check-prerequisites` proof-of-concept** (#3302) were all ported. **PyPI was documented as a first-class second install route** (#3516). New agents arrived — **Grok Build** (#3535) as a skills-based integration — while **Roo Code was retired** as a shut-down product (#3212). The rest was a broad defensive-validation sweep across the workflow engine (case-insensitive gate reject, quote-aware interpolation, host-less catalog-URL rejection, and dozens of "fail loudly on malformed input" guards). [\[github.com\]](https://github.com/github/spec-kit/releases)
-
-**v0.13.0–v0.13.4** (July 17–22) delivered the month's headline feature: the **`assess` Idea Assessment Pipeline extension** (#3568), a pre-spec evaluation flow. The release also completed the Python port of the three core scripts — **`create-new-feature`, `setup-plan`, and `setup-tasks`** (#3386) — and added **Azure DevOps `az`-CLI token acquisition** hardening (#3527), **community bundle submission automation** (#3553), and the standalone **`WorkflowResolver`** refactor (#3557). **Factory Droid CLI** joined as an integration (#3587), **Bob was updated to a skills-based layout for Bob 2.0** (#3415), the **`pipeline` workflow** was added to the community catalog (#3338), and the **spec-of-specs feature-breakdown** approach was documented for handling complex features (#3648). [\[github.com\]](https://github.com/github/spec-kit/releases)
-
-**v0.14.0–v0.14.4** (July 23–29) crossed a minor with a **security-hardening focus**: **bounded HTTP reads and strict redirect enforcement** (#3140, #3671), **secured extension/preset archive downloads** (#3141), and the **removal of the `shell` parameter from `run_command`** (#3716). The **git extension gained configurable Conventional Commit support** (#3413), the wheel now **bundles `scripts/python`** so `--script py` works from a clean install (#3665), and **Alquimia AI** joined as the month's third new agent (#2734). Documentation added a **Simplified Chinese README translation** (#3740), and the constitution stopped **propagating guidance into templates** (#3790). A long run of bundler, preset, and integration validation fixes rounded out the cluster. [\[github.com\]](https://github.com/github/spec-kit/releases)
-
-**v0.15.0–v0.15.1** (July 30–31) closed the month with a **first-class agent-native runtime events layer for integrations** (#3704) — the release's headline — plus a continued security pass: **TOCTOU-race elimination in file-unlink calls** (#3811, #3815, #3819), **UTF-8 encoding on registry file opens** (#3810, #3816), and **hardening of the extension URL-download cache against symlink/junction races** (#3869). Workflows gained the ability to **bind a gate verdict to a workflow input via `verdict_input`** (#3725), an opt-in **`constitution-sync` preset** shipped (#3873), the **`yolo` workflow** was added to the community catalog (#3864), and installs gained **tar-archive support** (#3874). [\[github.com\]](https://github.com/github/spec-kit/releases)
-
-### The Idea Assessment Pipeline: `assess`
-
-July's headline feature was the **`assess` extension** (#3568), an *idea-assessment pipeline* that ships as an opt-in extension and extends spec-driven development one step further upstream than it has ever reached. Where the core lifecycle begins at `/speckit.specify` — assuming the decision to build has already been made — `assess` addresses the question that comes *before* the spec: **should this idea be built at all, and is it understood well enough to specify?**
-
-The pipeline runs a staged flow — **capture → evidence → refine → design → decision** — that takes a raw idea, gathers supporting evidence, refines it into something concrete, sketches a design, and terminates in an explicit **go / clarify / kill** verdict. A `go` feeds a well-formed problem into the existing `/speckit.specify` step; a `clarify` routes back for more information; a `kill` stops work before a line of spec is written. Its input is just an idea — pasted text, a URL, a ticket, or a codebase pointer — so the pipeline works **equally well on an empty, freshly-initialized project or on an existing codebase** (#3732); a team can evaluate a green idea before any scaffolding exists, or assess a change against a repo that already has one.
-
-The feature drew the month's most prominent mainstream-press coverage: **heise online** ran *"From Idea to Spec: The New Feature in Spec Kit 0.13"* in both English and German, framing `assess` as the notable addition of the 0.13 line alongside the Azure DevOps CLI support and the bundler/preset validation fixes. Coming from a major European technology outlet rather than a developer blog, it was a signal that Spec Kit's release cadence is now tracked as mainstream tooling news. [\[heise.de\]](https://www.heise.de/en/news/From-Idea-to-Spec-The-New-Feature-in-Spec-Kit-0-13-11371866.html)
-
-### The Python Migration: the `py` Script Type
-
-Spec Kit's second July theme was quieter but structurally important: the project began migrating its shell scripts to **Python**. The new **`py` script type** (#3285) joins `sh` (bash) and `ps` (PowerShell) as a third option at `specify init`, backed by Python-interpreter resolution that skips broken stubs (including the Windows Store `python3` alias, #3385). The `py` type is the project's answer to the perennial bash/PowerShell parity tax — every script fix previously had to be written twice and kept in sync, a recurring source of the Windows-parity bugs that filled prior months' changelogs.
-
-Behind the new type, a systematic port landed piece by piece across the month: the **`update-agent-context`** updater (#3387), the **git extension scripts** (#3400), a **`check-prerequisites`** proof-of-concept (#3302), and finally the three core scripts — **`create-new-feature`, `setup-plan`, and `setup-tasks`** (#3386). The wheel was updated to bundle `scripts/python` so `--script py` works from a clean PyPI install (#3665), and the installation docs and init option table were updated to document the new type and the sh/ps migration plan (#3284, #3640). The end state is a single, cross-platform script implementation that removes an entire class of parity bugs. [\[github.com\]](https://github.com/github/spec-kit/releases)
-
-### Agent-Native Runtime Events
-
-The v0.15.0 headline was a **first-class agent-native runtime events layer for integrations** (#3704). It bridges Spec Kit to the host agent's own lifecycle via a set of canonical, snake_case event names — `session_start`, `pre_tool_use`, `post_tool_use`, `user_prompt_submit`, `stop`, and `session_end`. A lightweight, zero-dependency **Event Dispatcher** (`.specify/events.py`) is scaffolded during `specify init`, and per-integration **Event Adapters** translate each canonical event into the agent's *native* hook configuration — `.github/hooks/speckit.json` (bash/PowerShell variants) for **Copilot CLI**, `.claude/settings.json` for Claude Code, `.cursor/hooks.json` for Cursor, `.codex/config.toml` for Codex, a TypeScript plugin for opencode, and native settings merges for Gemini, Qwen, Devin, and Tabnine — so extension authors declare `events:` in `extension.yml` once and never learn agent-specific names. Resolution is a four-tier stack (CLI `--events false` → user `.specify/integration-events.yml` override → extension-declared events → built-in defaults), and multiple extensions declaring the same event all run. The change accompanied a broader integration-refinement run: agents that use an always-slash invocation (Droid, Forge, Cline) now render hyphenated `/speckit-<name>` commands correctly (#3688, #3642, #3622), native skill-invocation prefixes are preserved (#3663), and several agents (kiro-cli, Lingma, Pi, omp) were declared multi-install-safe. The through-line is that integrations are increasingly *native* to each agent rather than a lowest-common-denominator overlay. [\[github.com\]](https://github.com/github/spec-kit/releases)
-
-### The Security-Hardening Wave
-
-The dominant engineering theme across all twenty-eight releases was **security and robustness**. The work fell into three bands. **Bounded I/O:** every catalog, download, and bundle HTTP response is now read under a byte cap with strict redirect validation on every hop (#3140, #3671, #3763, #3141), closing a class of unbounded-read / DoS exposure. **Race elimination:** TOCTOU races in file-unlink and state-file handling were removed (#3811, #3815, #3819), the extension URL-download cache was hardened against symlink and junction races (#3869), and registry file opens were pinned to UTF-8 (#3810, #3816). **Injection and input hardening:** the `shell` parameter was removed from `run_command` (#3716), user-supplied catalog metadata is escaped in every discovery/list/`init` output path (#3772, #3773, #3774, #3806, #3826, #3863), and catalog URLs are re-validated *after* redirects to preserve HTTPS/host guarantees (#3523, #3524).
-
-Running alongside this was a systematic **"fail loudly, don't crash"** campaign across the workflow engine and catalog loaders: dozens of PRs replaced raw `ValueError`/`OverflowError`/crash paths with clean validation errors on malformed input — non-string commands, prompts, integrations, and models; non-list branches and `wait_for` entries; `priority: .inf` and boolean priorities; non-mapping manifest blocks; and superscript-digit gate prompts. The entire month's hardening arrived as prevention rather than response. [\[github.com\]](https://github.com/github/spec-kit/releases)
-
-### The Workflow Engine & Bundles Mature
-
-Beyond hardening, the **workflow engine** kept gaining capability. Steps can now read their **workflow source directory** (#3469), the shell and prompt steps got **configurable, validated timeouts** (#3404, #3847, #3768), a **gate verdict can bind to a workflow input** via `verdict_input` (#3725), and the **`WorkflowResolver`** was extracted as a standalone component (#3557). Two community workflows reached the catalog — the guided **`pipeline`** (#3338, which chains into the core `/speckit.converge`) and **`yolo`** (#3864) — bringing the standalone-workflow count to two.
-
-The **bundle subsystem** introduced in June matured through a long tail of correctness work — reproducible builds via canonical POSIX arcnames (#3658), literal UTF-8 manifest dumps (#3660), strict rejection of malformed `requires`/`provides`/`integration`/`catalogs` blocks, and a clean `BundlerError` on malformed download URLs (#3586). **Community bundle submission automation** landed (#3553) and the **SicarioSpec Security & Governance Bundle** became a cataloged community bundle (#3636), making bundles a live community-submittable artifact type in practice. [\[github.com\]](https://github.com/github/spec-kit/releases)
-
-### Agent Integrations
-
-The agent portfolio grew net **+3 to 37 integrations**. Three joined — **Grok Build** (#3535), **Factory Droid CLI** (#3587, closing the 300+-day #822), and **Alquimia AI** (#2734) — while **Roo Code** was retired as a shut-down product (#3212). **Bob** was migrated to a skills-based layout for Bob 2.0 (#3415), **Kilocode** now installs commands under `.kilo/commands` (#3672), and a broad correctness pass fixed hyphenated-command rendering and dispatch for the always-slash agents (Droid, Forge, Cline) and preserved native skill-invocation prefixes (#3663). The pattern continues from June — pruning dead products while making the surviving integrations more native to each agent. [\[github.com\]](https://github.com/github/spec-kit/releases)
-
-### The Extension & Preset Ecosystem
-
-The community extension catalog grew from 125 to **144 entries** during July — nineteen net additions. Community presets grew from 23 to **29**, community workflows reached **2**, and the first community **bundle** (SicarioSpec) was cataloged.
-
-Notable new extensions by category:
-
- **Verification, drift & evidence**: Test Coverage Drift Control, PatchWarden Evidence Pack, Quality Gates (Enforcement Layer), Verify Review Ship, Intent Reconciliation
- **Requirements & intake**: EARS Requirements Syntax, the `assess` Idea Assessment Pipeline, Spec-Kit BDD, Charter
- **External trackers & round-trip**: Linear Weave, Multi-Repo Branch Sync, ContextForge MCP
- **Design & docs**: Spec Kit Figma, Figma Starter, Blueprint Index — Living Architecture Map, LLM Wiki, Dotdog
- **Knowledge & orchestration**: OKF Knowledge Bundle Generator, Orchestration Task Context Management, Spec Kit Memory
-
-The catalog also showed strong maintenance activity: **DocGuard — CDD Enforcement** advanced through several releases (to v0.33.0), **Verify Review Ship** and **Quality Gates (Enforcement Layer)** iterated rapidly, and **Architecture Guard**, **Golden Demo**, **Coding Standards Drift Control**, **Ripple**, and the **Ralph Loop** all shipped updates. The preset side was the month's busiest: a large **governance-preset** family expanded and iterated — the **Autonomous Run Governance** and **Parallel Autonomous Run Governance** presets, a full **Intake** governance suite (Authoring, Review, Sequencing), **Test-First Governance**, and coordinated version bumps across the A11Y, Agent-Parity, Cross-Platform, iSAQB-Architecture, Architecture, and Security governance presets. [\[github.com\]](https://github.github.io/spec-kit/community/extensions.html)
-
-### Documentation & Docs Site
-
-July's documentation work paired the new features with a landing-page refresh. The **spec-of-specs feature-breakdown** approach was documented for handling complex features (#3648), the **`py` (Python) script type** was documented in the installation guide and init option table (#3284, #3625, #3640), and the **`__SPECKIT_COMMAND`** token for portable cross-command references was documented (#3503). The landing page was reframed to weave the **harness/SDLC framing** and modernize the install and positioning story (#3565, #3567), ecosystem stats were refreshed (#3561), and **`extensions.yml` hook configuration** was documented (#3563). Upgrade guidance clarified that project-file upgrades flow through `integration upgrade` / `extension update` (#3326) and that Claude Code files live in `.claude/skills` (#3708). [\[github.com\]](https://github.com/github/spec-kit/releases)
-
-## Community & Content
-
-### Press and Industry Coverage
-
-July's coverage shifted from "what is SDD" explainers toward tool comparisons, companion tooling, and pointed "who verifies the spec?" critiques. No first-party Microsoft or GitHub post appeared in July; the nearest remained June's Microsoft Developer Blog piece.
-
-**heise online** (Wolf Hosbach, July 21) was the month's most prominent mainstream-press coverage, publishing *"From Idea to Spec: The New Feature in Spec Kit 0.13"* in both English and German — news coverage of the `assess` Idea Assessment Pipeline, the Azure DevOps CLI support, and the 0.13 validation fixes. Mainstream European tech press now tracks Spec Kit's minor releases as tooling news. [\[heise.de\]](https://www.heise.de/en/news/From-Idea-to-Spec-The-New-Feature-in-Spec-Kit-0-13-11371866.html)
-
-**Towards AI** (Rost Glukhov, July 12) compared **GitHub Spec Kit vs Kiro vs Claude Code** on SDD workflow rather than model capability, part of a July-long current of "which SDD tool?" comparisons that increasingly pit Spec Kit specifically against Kiro. [\[pub.towardsai.net\]](https://pub.towardsai.net/github-spec-kit-vs-kiro-vs-claude-code-sdd-workflows-a9e7fab3e545)
-
-**ranjankumar.in** (Ranjan Kumar, July 13) argued that four SDD frameworks — BMAD, Spec Kit, Kiro, and Superpowers — converge on the same structural "invariants," engaging Spec Kit's actual internals (`workflows.md`, run-state `state.json`) rather than treating it as a black box. [\[ranjankumar.in\]](https://ranjankumar.in/spec-driven-development-invariants-not-frameworks)
-
-Release-trackers continued their factual coverage of the 0.13–0.15 run, and **Level Up Coding** (JingJing "Chris" Bao) published a three-part practitioner series on Spec Kit's presets, extensions, and pipeline/workflow features as the path beyond linear slash-commands. [\[levelup.gitconnected.com\]](https://levelup.gitconnected.com/from-linear-commands-to-automated-pipelines-how-spec-kit-orchestrates-nonlinear-ai-development-55ca03c5617b)
-
-### The Companion-Tooling Ecosystem
-
-July's most telling signal was not an article but a pattern: independent developers responded to Spec Kit's most-cited critiques by **building tools on top of it**. The recurring complaint — documentation proliferation and "who verifies the generated spec?" — turned into code.
-
- **artgraph** (mori-shin, July 20) — a deterministic, hash-based spec↔code drift-detection CLI with an `artgraph integrate speckit` hook, built specifically to give Spec Kit's LLM-prompt-based verification a deterministic backstop. [\[zenn.dev\]](https://zenn.dev/mrmtsntr/articles/artgraph-spec-code-drift)
- **SpecJudge** (Joaquín Ruiz, July 21) — a companion CLI that reads Spec Kit's constitution/spec/tasks artifacts to recommend a *right-sized* model for the project. [\[dev.to\]](https://dev.to/jokiruiz/specjudge-which-ai-model-is-right-sized-for-your-project-ask-your-specs-2edp)
- **GAUNTLEX** (Sanjoy Ghosh, July 16) — named Spec Kit a leading SDD tool while arguing SDD leaves a security-testing gap, and shipped a tool to fill it. [\[hashnode.dev\]](https://sanjoy1234.hashnode.dev/the-testing-gap-nobody-s-talking-about-in-spec-driven-development)
- **Custom skills** — [`speckit-next`](https://qiita.com/htcd/items/ec76f2b7194be3297b93) (htcd, July 31), a skill that recommends the next command because the names and order are hard to remember, and [`prefill`](https://velog.io/@k3nta/ai-adoption-journey-1-tools) (k3nta, July 1), a skill that patches `clarify`'s blind spots.
-
-Together these are the clearest evidence yet that Spec Kit has become a *platform* — its artifacts are stable enough, and its gaps well-enough understood, that a third-party tooling layer is forming around it. [\[zenn.dev\]](https://zenn.dev/mrmtsntr/articles/artgraph-spec-code-drift)
-
-### Developer Articles and Blog Posts
-
-July's articles skewed heavily multilingual — strong hands-on series in Japanese, Chinese, and Korean — with a clear thread of honest, use-it-in-anger critique.
-
-Notable articles:
-
- **ta_kawano** (note.com, July 28–31) published a consolidated four-part **Kiro vs Spec Kit** head-to-head, completing a 108-task / 301-test build with Spec Kit where Kiro ran out of credit, praising measurable Success Criteria and auto-listed edge cases while flagging ~15,000 lines of generated documentation — and reframing Spec Kit as a requirements-elicitation tool. [\[note.com\]](https://note.com/takawano/n/ncb552ee37331)
- **magebyte / 码哥字节** (SegmentFault, July 26) built a Go REST API through the five-step workflow, covered the three spec-persistence models and the extension/preset system, and claimed ~80% less AI "hallucination" rework. [\[segmentfault.com\]](https://segmentfault.com/a/1190000048082146)
- **Nil Seri** (Medium, July 16) published a brownfield guide adding Spec Kit to an existing Spring Boot / Maven project with Jira and Confluence integration — "from Jira ticket to verified code." [\[medium.com\]](https://medium.com/@senoritadeveloper/using-spec-kit-in-an-existing-spring-boot-maven-project-from-jira-ticket-to-verified-code-4e6da99b5d19)
- **kitroc7134** (Qiita, July 4) tested `/speckit.converge` with deliberate fault-injection on a FastAPI Todo API — detect drift → append convergence tasks → re-implement — validating June's convergence loop in the field. [\[qiita.com\]](https://qiita.com/kitroc7134/items/117d4839f259bc403626)
- **yutakaosada** (Zenn, July 25) — a Microsoft-MVP .NETラボ talk that uses Spec Kit but candidly flags AI-credit consumption, over-production of docs, and single-source-of-truth collapse, comparing it with Copilot Plan mode. [\[zenn.dev\]](https://zenn.dev/yutakaosada/articles/70e01981647159)
-
-Additional coverage appeared on TechWealthBuzz, Hashnode, TabNews-adjacent outlets, CSDN and 腾讯云 (Chinese), Naver/velog/Tistory (Korean), and Qiita/note (Japanese) — including several "is it too heavy?" and documentation-proliferation critiques, and a [Korean instructor's piece](https://blog.naver.com/gaussian88/224363268926) citing Spec Kit's star growth from ~90k in May to ~120k in July. [\[note.com\]](https://note.com/takawano/n/ncb552ee37331)
-
-### Community Growth by the Numbers
-
-| Metric | Start of July | End of July | Change |
-| --- | --- | --- | --- |
-| GitHub stars | 117,423 | 124,655 | +7,232 (+6%) |
-| Forks | 10,382 | 11,125 | +743 |
-| Contributors | 245 | ~258 | +~13 |
-| Releases (total) | 177 | 205 | +28 (v0.12.3–v0.15.1) |
-| Community extensions | 125 | 144 | +19 |
-| Community presets | 23 | 29 | +6 |
-| Community workflows | 1 | 2 | +1 |
-| Community bundles | 1 | 1 | steady |
-| Agent integrations | 34 | 37 | +3 (net) |
-| Discussions (open) | 457 | ~467 | +~10 |
-
-## SDD Ecosystem & Industry Trends
-
-### From Tool to Platform
-
-July's clearest ecosystem signal was structural: the conversation moved from "how do I use Spec Kit?" to "what do I build *around* it?" The companion tools — artgraph for deterministic drift, SpecJudge for model sizing, GAUNTLEX for the testing gap, and a growing set of custom agent skills — treat Spec Kit's artifacts (constitution, spec, tasks, run-state) as a stable substrate to build against. The public community catalog reinforces the point: the loudest theme across the 144 cataloged extensions is verification and quality (review, validate, drift, sync, verify, audit), and core SDD verbs are increasingly *re-expressed* by extensions rather than merely overridden — evidence of demand for composable, overridable core commands. [\[github.com\]](https://github.github.io/spec-kit/community/extensions.html)
-
-### Competitive Landscape
-
-The "which SDD tool?" comparison remained the dominant content genre, but July's framing narrowed: where June's surveys ran a seven-tool field, July's most substantive pieces increasingly went head-to-head **Spec Kit vs Kiro** (ta_kawano, [faruryo](https://qiita.com/faruryo/items/87a14728299e89f80ff4), Towards AI). The recurring verdict held — Spec Kit is the heaviest and most flexible option, strong on measurable Success Criteria, requirements elicitation, and greenfield decomposition, while its documentation proliferation and cognitive load are the consistent trade-off. The convergence-invariants analyses (ranjankumar.in) went further, arguing the frameworks are converging on the same structural primitives, which shifts the competitive question from "which tool" to "which ecosystem and governance model." On that axis, Spec Kit's widening catalog, agent-neutrality, and now a forming companion-tooling layer are its differentiators. [\[note.com\]](https://note.com/takawano/n/ncb552ee37331)
-
-## Roadmap
-
-Areas under discussion or in progress for future development:
-
- **Upstream of the spec** — the `assess` Idea Assessment Pipeline extends SDD before the spec exists. Expect the capture→evidence→refine→design→decision flow to deepen, and the boundary between idea assessment and `/speckit.specify` to be a key area to refine as the pipeline sees real use. [\[heise.de\]](https://www.heise.de/en/news/From-Idea-to-Spec-The-New-Feature-in-Spec-Kit-0-13-11371866.html)
- **The Python migration** — the `py` script type and the port of the core scripts, git extension, and agent-context updater establish Python as the path out of the bash/PowerShell parity tax. Completing the port and making `py` a well-trodden default (rather than sh/ps) is the payoff: an entire class of Windows-parity bugs disappears. [\[github.com\]](https://github.com/github/spec-kit/releases)
- **Agent-native runtime events** — the first-class events layer lets integrations wire Spec Kit into each agent's own runtime through canonical event names and per-agent adapters. The layer is **actively evolving** — early signals point to opencode context injection and JSON-envelope agent hooks. Expect more agents to gain event adapters and extension authors to lean on the declarative `events:` surface as the integration layer shifts from lowest-common-denominator overlay to genuinely native behavior. [\[github.com\]](https://github.com/github/spec-kit/releases)
- **Copilot skills as the default** — July shipped a warning ahead of the skills-default rollout, and the signals now point to the **default flip being in progress** — moving `specify init --integration copilot` to the skills-based layout and making the default init integration overridable via an environment variable, with the markdown-command layout becoming the legacy path. [\[github.com\]](https://github.com/github/spec-kit/releases)
- **A Copilot-native surface** — the first-party [`github/spec-kit-copilot`](https://github.com/github/spec-kit-copilot) repo (a listed community friend) wraps the `specify` CLI as a **Copilot skills plugin** (nine skills across setup, init, extensions, presets, bundles, workflows, and self-upgrade) for the Copilot CLI and App, aligned to CLI v0.15.0. The emerging direction is a **visual, Copilot-driven surface** — early work explores canvas dashboards for the Spec-Driven Development flow, a Bug Fix Pipeline, and `assess` — turning the CLI's flows into an interactive layer. [\[github.com\]](https://github.com/github/spec-kit-copilot)
- **The companion-tooling layer** — artgraph, SpecJudge, GAUNTLEX, and custom skills signal a third-party ecosystem forming on Spec Kit artifacts. The open question is whether the project absorbs these patterns (as it did drift → `converge`) or leaves them to the ecosystem; the verification/drift demand in the extension catalog suggests continued upstream pull. [\[github.com\]](https://github.com/github/spec-kit/releases)
- **Security and robustness as a standing discipline** — July's hardening wave (bounded reads, strict redirects, TOCTOU elimination, fail-loudly validation) shifted from feature to routine, and the signals point to it **continuing as an ongoing campaign** — a stdin read cap to close a DoS path and a broader atomicity push (atomic temp-file writes, subprocess timeouts, structured logging, and narrowed exception handlers). Sustaining the no-unbounded-read invariant as the surface (bundles, workflows, catalogs, events) grows is the ongoing work. [\[github.com\]](https://github.com/github/spec-kit/releases)
- **Experience simplification** — documentation proliferation and cognitive load remain the single most-cited concern across July's balanced reviews (ta_kawano, yutakaosada, and multiple Japanese/Korean pieces). The `assess` upstream gate, the lean/TinySpec presets, `/speckit.converge`, and the forming companion-tooling layer all provide answers; surfacing them to new users is the persistent opportunity. [\[note.com\]](https://note.com/takawano/n/ncb552ee37331)
@@ -1,14 +1,14 @@
 # Spec Kit - June 2026 Newsletter

-This edition covers Spec Kit activity in June 2026 — a month of maturation and mainstream validation. Twenty-five releases shipped (v0.9.0 through v0.12.2), spanning four minor bumps and delivering two headline capabilities: the **`/speckit.converge` command**, which closes the loop between a spec and the code that implements it, and the new **`specify bundle` subsystem**, a role-based distribution layer that composes extensions, presets, workflows, and steps into a single installable unit. The workflow engine became programmable, the git extension went opt-in as the first real breaking change, and the ecosystem crossed **120+ community extensions**. Externally, June brought broad validation — Microsoft's own Developer Blog published a first-party spec-driven development post, an enterprise reported 2–4× velocity gains, and coverage spanned dozens of languages. A summary is in the table below, followed by details.
+This edition covers Spec Kit activity in June 2026 — a month of maturation and mainstream validation. Twenty-five releases shipped (v0.9.0 through v0.12.2), spanning four minor bumps and delivering two headline capabilities: the **`/speckit.converge` command**, which closes the loop between a spec and the code that implements it, and the new **`specify bundle` subsystem**, a role-based distribution layer that composes extensions, presets, workflows, and steps into a single installable unit. The workflow engine became programmable, the git extension went opt-in as the first real breaking change, and the ecosystem crossed **120+ community extensions**. Externally, June was the highest-volume press month on record — Microsoft's own Developer Blog published a first-party spec-driven development post, an enterprise reported 2–4× velocity gains, and 75 substantive articles appeared across 25+ languages. A summary is in the table below, followed by details.

 | **Spec Kit Core (Jun 2026)** | **Community & Content** | **SDD Ecosystem & Next** |
 | --- | --- | --- |
-| Twenty-five releases shipped (v0.9.0–v0.12.2) with key features: the `/speckit.converge` convergence loop, the `specify bundle` role-based packaging subsystem, a programmable workflow engine (step catalog, JSON output, `from_json`), the git extension becoming opt-in (`--no-git` removed), and six new agents (Cline, rovodev, Zed, Firebender, ZCode, omp). The repo grew from ~107k to **~116,500 stars**. [\[github.com\]](https://github.com/github/spec-kit/releases) | The community extension catalog grew from 105 to **124 entries**; presets reached **23**. Microsoft's Developer Blog published a first-party SDD post naming Spec Kit as the operationalizing toolkit. Press coverage spanned dozens of languages. **245 contributors** now listed. | An enterprise (SNCF Connect & Tech) reported **2–4× velocity** from SDD. Analysts and comparisons increasingly name Spec Kit "the category anchor" and agent-neutral default. Competitors differentiate on brownfield and drift; balanced reviews continue to flag review-overload and ceremony for small tasks. |
+| Twenty-five releases shipped (v0.9.0–v0.12.2) with key features: the `/speckit.converge` convergence loop, the `specify bundle` role-based packaging subsystem, a programmable workflow engine (step catalog, JSON output, `from_json`), the git extension becoming opt-in (`--no-git` removed), and six new agents (Cline, rovodev, Zed, Firebender, ZCode, omp). The repo grew from ~107k to **~116,500 stars**. [\[github.com\]](https://github.com/github/spec-kit/releases) | The community extension catalog grew from 105 to **124 entries**; presets reached **23**. Microsoft's Developer Blog published a first-party SDD post naming Spec Kit as the operationalizing toolkit. June was the highest-volume press month yet — **75 substantive articles** across 25+ languages. **245 contributors** now listed. | An enterprise (SNCF Connect & Tech) reported **2–4× velocity** from SDD. Analysts and comparisons increasingly name Spec Kit "the category anchor" and agent-neutral default. Competitors differentiate on brownfield and drift; balanced reviews continue to flag review-overload and ceremony for small tasks. |

 ***

-> **Spec-Driven Development, Institutionalized.** If May was defined by milestone 100s, June was defined by validation from outside the project. Microsoft's own Developer Blog published a first-party post presenting spec-driven development and positioning Spec Kit as the toolkit that operationalizes it. An enterprise — SNCF Connect & Tech — went on the record with **2–4× velocity gains** from adopting SDD. Coverage appeared in dozens of languages, and the recurring verdict across independent comparisons was that Spec Kit is "the category anchor" and the agent-neutral default. Meanwhile the core matured from v0.9 to v0.12: the workflow engine became genuinely programmable, the first real breaking change shipped, and the new convergence loop and bundle subsystem gave the project answers to its two most-cited gaps — drift and distribution. None of this happens without the community — the contributors, extension and preset authors, bundle builders, and practitioners writing in a dozen languages. Thank you.
+> **Spec-Driven Development, Institutionalized.** If May was defined by milestone 100s, June was defined by validation from outside the project. Microsoft's own Developer Blog published a first-party post presenting spec-driven development and positioning Spec Kit as the toolkit that operationalizes it. An enterprise — SNCF Connect & Tech — went on the record with **2–4× velocity gains** from adopting SDD. A record **75 substantive articles** appeared in more than 25 languages, and the recurring verdict across independent comparisons was that Spec Kit is "the category anchor" and the agent-neutral default. Meanwhile the core matured from v0.9 to v0.12: the workflow engine became genuinely programmable, the first real breaking change shipped, and the new convergence loop and bundle subsystem gave the project answers to its two most-cited gaps — drift and distribution. None of this happens without the community — the contributors, extension and preset authors, bundle builders, and practitioners writing in a dozen languages. Thank you.

 ## Spec Kit Project Updates

@@ -84,7 +84,7 @@ On **June 10**, the **Microsoft Developer Blog** published *"Spec-Driven Develop

 ### Press and Industry Coverage

-June's press coverage spanned dozens of languages and platforms.
+June was the **highest-volume coverage month on record — 75 substantive articles** across more than 25 languages.

 **Xebia / XPRT Magazine #21** (Hidde de Smet & Emanuele Bartolesi, June 17) published a 32-minute full six-command walkthrough covering both greenfield and brownfield, honest about markdown-review overhead and where spec quality becomes the bottleneck. [\[xebia.com\]](https://xebia.com/blog/building-software-with-spec-kit/)

@@ -102,7 +102,7 @@ June's press coverage spanned dozens of languages and platforms.

 ### Developer Articles and Blog Posts

-June's coverage skewed heavily multilingual, with deep hands-on series in Chinese, Japanese, and Korean, and a strong current of "which tool should I choose?" comparisons.
+June's 75 articles skewed heavily multilingual, with deep hands-on series in Chinese, Japanese, and Korean, and a strong current of "which tool should I choose?" comparisons.

 Notable English-language articles:

@@ -137,7 +137,7 @@ Coverage also appeared on TabNews (Portuguese), Habr and CSDN, note.com, Substac

 ### The Category Consolidates

-Across June's broad article coverage, a consistent framing emerged: spec-driven development is now an established category, and Spec Kit is its reference implementation. SSOJet called it "the category anchor," Design News and multiple comparison pieces called it the agent-neutral default, and ToolTwist's CxO guide named it the "safe default for scaling teams." The Microsoft Developer Blog post and the SNCF enterprise interview extended that framing beyond the developer press into institutional and enterprise contexts. [\[ssojet.com\]](https://ssojet.com/blog/best-spec-driven-development-tools)
+Across June's record article volume, a consistent framing emerged: spec-driven development is now an established category, and Spec Kit is its reference implementation. SSOJet called it "the category anchor," Design News and multiple comparison pieces called it the agent-neutral default, and ToolTwist's CxO guide named it the "safe default for scaling teams." The Microsoft Developer Blog post and the SNCF enterprise interview extended that framing beyond the developer press into institutional and enterprise contexts. [\[ssojet.com\]](https://ssojet.com/blog/best-spec-driven-development-tools)

 ### Competitive Landscape

@@ -4,7 +4,7 @@ This edition covers Spec Kit activity in May 2026 — a month defined by three m

 | **Spec Kit Core (May 2026)** | **Community & Content** | **SDD Ecosystem & Next** |
 | --- | --- | --- |
-| Fourteen releases shipped with key features: multi-install for concurrent agent integrations, constitution governance in implement, authentication provider registry, Hermes and Lingma agents, and a `__init__.py` decomposition series. The repo grew from ~92k to **106,951 stars**, crossing **100K** on May 21. [\[github.com\]](https://github.com/github/spec-kit/releases) | The community extension catalog crossed **100 entries** (now 105). Open Source Friday livestream drove a press wave: Visual Studio Magazine, DevOps.com, MarkTechPost, HackerNoon, and many more across multiple languages. **217 contributors** now listed. | MarkTechPost called Spec Kit "the most community-adopted open-source option" for SDD. The Futurum Group's Mitch Ashley framed specs as "the unit of governance across agents and contributors." Truong Phung published a 61-min production playbook referencing Spec Kit. Competitors grew but differentiate on orchestration; Spec Kit leads in portability and community. |
+| Fourteen releases shipped with key features: multi-install for concurrent agent integrations, constitution governance in implement, authentication provider registry, Hermes and Lingma agents, and a `__init__.py` decomposition series. The repo grew from ~92k to **106,951 stars**, crossing **100K** on May 21. [\[github.com\]](https://github.com/github/spec-kit/releases) | The community extension catalog crossed **100 entries** (now 105). Open Source Friday livestream drove a press wave: Visual Studio Magazine, DevOps.com, MarkTechPost, HackerNoon, and 25+ more articles — now tracked across multiple languages following an expanded discovery methodology. **217 contributors** now listed. | MarkTechPost called Spec Kit "the most community-adopted open-source option" for SDD. The Futurum Group's Mitch Ashley framed specs as "the unit of governance across agents and contributors." Truong Phung published a 61-min production playbook referencing Spec Kit. Competitors grew but differentiate on orchestration; Spec Kit leads in portability and community. |

 ***

@@ -76,7 +76,7 @@ May produced the broadest press coverage to date, with publications from the mai

 ### Developer Articles and Blog Posts

-May produced a wave of independent coverage across many languages.
+May produced a wave of independent coverage — well beyond any previous month. Starting this month, article discovery was expanded beyond English-centric search engines to include language-appropriate engines for 25+ languages, so the broader coverage partly reflects wider discovery rather than a sudden spike.

 Notable non-English coverage:

@@ -1,6 +1,6 @@
 [project]
 name = "specify-cli"
-version = "0.16.0"
+version = "0.15.2"
 description = "Specify CLI, part of GitHub Spec Kit. A tool to bootstrap your projects for Spec-Driven Development (SDD)."
 readme = "README.md"
 requires-python = ">=3.11"
@@ -157,11 +157,7 @@ class CommandRegistrar:
            return ""

        yaml_str = yaml.dump(
-            fm,
-            default_flow_style=False,
-            sort_keys=False,
-            allow_unicode=True,
-            width=float("inf"),
+            fm, default_flow_style=False, sort_keys=False, allow_unicode=True
        )
        return f"---\n{yaml_str}---\n"

@@ -24,19 +24,8 @@ def event_run(
    """Resolve and run an event-driven command script with stdin payload."""
    from ..events import resolve_and_run_event_command

-    # Read payload from stdin if available (capped at 1 MiB to prevent DoS).
-    MAX_STDIN_BYTES = 1 * 1024 * 1024
-    if not sys.stdin.isatty():
-        raw = sys.stdin.read(MAX_STDIN_BYTES)
-        if not sys.stdin.eof:
-            raise typer.Exit(
-                code=1,
-                message="stdin payload exceeds 1 MiB limit; "
-                "truncate or pipe a smaller payload",
-            )
-        payload = raw
-    else:
-        payload = "{}"
+    # Read payload from stdin if available
+    payload = sys.stdin.read() if not sys.stdin.isatty() else "{}"

    # Run the event command
    project_root = Path.cwd()  # The agent runs events from project root
@@ -251,7 +251,7 @@ def _resolve_argv(template_path, project_root, ext_id):
    return [str(script_abs), *rest]


-def _run_inline(command_name, payload, project_root, timeout, envelope="plain", native_event=""):
+def _run_inline(command_name, payload, project_root, timeout):
    """Resolve and run the event command with stdlib only (no specify_cli)."""
    template_path, ext_id = _find_command_template(command_name, project_root)
    if not template_path:
@@ -269,7 +269,7 @@ def _run_inline(command_name, payload, project_root, timeout, envelope="plain",
            cwd=str(project_root),
        )
        if result.stdout:
-            _emit(result.stdout, envelope, native_event)
+            sys.stdout.write(result.stdout)
        if result.returncode != 0:
            if result.stderr:
                sys.stderr.write(result.stderr)
@@ -283,46 +283,6 @@ def _run_inline(command_name, payload, project_root, timeout, envelope="plain",
        return 2


-def _emit(output, envelope, native_event=""):
-    """Write handler output to stdout in the agent's context-injection shape.
-
-    Not every agent injects a hook's plain-text stdout as model context:
-    Gemini/Tabnine/Qwen/Devin are JSON-only protocols (plain text becomes
-    user-facing noise, never context), Copilot discards non-JSON stdout, and
-    Cursor parses stdout as JSON. The native hook command passes the envelope
-    as the dispatcher's 5th argument (see events_context_envelope on the
-    integration classes), and the native event name as the 6th argument so
-    hookSpecificOutput can include hookEventName:
-
-      hookSpecificOutput → {"hookSpecificOutput": {"hookEventName": ..., "additionalContext": ...}}
-      additionalContext  → {"additionalContext": ...}   (top-level, Copilot)
-      additional_context → {"additional_context": ...}  (top-level, Cursor)
-      suppress           → emit nothing (strict-JSON agents on events whose
-                           output can't be used)
-      plain (default)    → passthrough (Claude/Codex inject plain stdout)
-
-    Empty output emits nothing under any envelope (an empty additionalContext
-    is useless noise).
-    """
-    if not output:
-        return
-    if envelope == "suppress":
-        return
-    if envelope == "hookSpecificOutput":
-        payload = {"additionalContext": output}
-        if native_event:
-            payload["hookEventName"] = native_event
-        sys.stdout.write(json.dumps({"hookSpecificOutput": payload}) + "\\n")
-        return
-    if envelope == "additionalContext":
-        sys.stdout.write(json.dumps({"additionalContext": output}) + "\\n")
-        return
-    if envelope == "additional_context":
-        sys.stdout.write(json.dumps({"additional_context": output}) + "\\n")
-        return
-    sys.stdout.write(output)
-
-
 def main():
    if len(sys.argv) < 3:
        sys.exit(0)
@@ -337,16 +297,6 @@ def main():
            timeout = int(sys.argv[3])
        except (TypeError, ValueError):
            timeout = 120
-    # Optional 5th arg: context-injection envelope for stdout (C13): plain
-    # (default), hookSpecificOutput, additionalContext, additional_context,
-    # or suppress. Unknown values fall back to plain passthrough.
-    envelope = sys.argv[4] if len(sys.argv) >= 5 else "plain"
-    if envelope not in ("plain", "hookSpecificOutput", "additionalContext", "additional_context", "suppress"):
-        envelope = "plain"
-    # Optional 6th arg: native event name for hookSpecificOutput's
-    # hookEventName field (required by Qwen's hooks spec; included by
-    # Gemini/Tabnine/Devin which derive from the same protocol).
-    native_event = sys.argv[5] if len(sys.argv) >= 6 else ""
    payload = sys.stdin.read() if not sys.stdin.isatty() else "{}"
    project_root = Path(__file__).parent.parent.resolve()

@@ -357,14 +307,14 @@ def main():
        from specify_cli.events import resolve_and_run_event_command
        sys.exit(
            resolve_and_run_event_command(
-                command_name, _event_name, payload, project_root, timeout=timeout, envelope=envelope, native_event=native_event
+                command_name, _event_name, payload, project_root, timeout=timeout
            )
        )
-    except (ImportError, TypeError):
+    except ImportError:
        pass

    # Fallback: self-contained stdlib resolver (one-time/temporary installs).
-    sys.exit(_run_inline(command_name, payload, project_root, timeout, envelope, native_event))
+    sys.exit(_run_inline(command_name, payload, project_root, timeout))


 if __name__ == "__main__":
@@ -412,21 +362,17 @@ function resolveDispatcher(directory: string): void {{
  ) as string;
 }}

-function runEvent(command: string, event: string, input: any, output: any, timeoutSec: number): string {{
-  if (!DISPATCHER) return '';
+function runEvent(command: string, event: string, input: any, output: any, timeoutSec: number): void {{
+  if (!DISPATCHER) return;
  try {{
    // execFileSync with an argv array invokes the interpreter directly — no
    // shell — so command/event strings with metacharacters can't break out
    // of the dispatcher argument (C9). The dispatcher arg is seconds; the
    // execFileSync timeout is ms with a buffer so the outer cap fires after
-    // the dispatcher's inner subprocess (S3). stdout is captured and
-    // returned so context-injection hooks (experimental.chat.system.transform,
-    // chat.message) can push it into their outputs; stderr stays inherited so
-    // dispatcher errors remain visible (C11).
-    return execFileSync(INTERPRETER, [DISPATCHER, command, event, String(timeoutSec)], {{
+    // the dispatcher's inner subprocess (S3).
+    execFileSync(INTERPRETER, [DISPATCHER, command, event, String(timeoutSec)], {{
      input: JSON.stringify({{ input, output }}),
-      stdio: ['pipe', 'pipe', 'inherit'],
-      encoding: 'utf-8',
+      stdio: ['pipe', 'inherit', 'inherit'],
      timeout: (timeoutSec + {buffer}) * 1000,
    }});
  }} catch (e) {{
@@ -436,12 +382,6 @@ function runEvent(command: string, event: string, input: any, output: any, timeo
  }}
 }}

-// Cache session_start handler output per sessionID so non-idempotent
-// handlers (setup, telemetry, file-mutating scripts) run once per session
-// instead of on every LLM request (experimental.chat.system.transform
-// fires per LLM turn). Evicted on session.deleted.
-const sessionStartCache = new Map<string, string>();
-
 {event_entries}

 export default (async ({{ client, project, directory, $ }}) => {{
@@ -584,13 +524,7 @@ def _resolve_event_command_argv(
    else:
        base = project_root / ".specify"

-    try:
-        tokens = shlex.split(script_cmd, posix=(os.name != "nt"))
-    except ValueError:
-        # Mirror the generated dispatcher's _resolve_argv: a scripts: value
-        # shlex cannot tokenize (e.g. an unclosed quote) declares no runnable
-        # script, so degrade to "no argv" instead of raising.
-        return None
+    tokens = shlex.split(script_cmd, posix=(os.name != "nt"))
    if not tokens:
        return None
    script_abs = base / tokens[0]
@@ -651,26 +585,12 @@ def resolve_and_run_event_command(
    project_root: Path,
    *,
    timeout: int = 120,
-    envelope: str = "plain",
-    native_event: str = "",
 ) -> int:
    """Core entry point to resolve and execute an event-driven command.

    *timeout* is the per-handler timeout in seconds, passed through from the
    native hook config via the dispatcher (S4) so a handler configured above
    the previous fixed 120s cap can run for its full duration.
-
-    *envelope* selects how the handler's stdout is emitted for the agent's
-    context-injection protocol (C13): ``plain`` passthrough (Claude/Codex
-    inject plain stdout), ``hookSpecificOutput``/``additionalContext``/
-    ``additional_context`` JSON wrappers (Gemini/Tabnine/Qwen/Devin, Copilot,
-    Cursor respectively), or ``suppress`` (strict-JSON agents on events whose
-    output can't be used).
-
-    *native_event* is the agent's native hookEventName (e.g. ``"SessionStart"``),
-    required inside ``hookSpecificOutput`` by Qwen's hooks spec (and included
-    by the Claude Code hooks spec Gemini/Tabnine/Devin derive from). Only
-    used when *envelope* is ``hookSpecificOutput``.
    """
    template_path, ext_id = _find_command_template(command_name, project_root)
    if not template_path:
@@ -690,7 +610,7 @@ def resolve_and_run_event_command(
            cwd=str(project_root),
        )
        if result.stdout:
-            _emit_event_stdout(result.stdout, envelope, native_event)
+            sys.stdout.write(result.stdout)
        if result.returncode != 0:
            if result.stderr:
                sys.stderr.write(result.stderr)
@@ -704,35 +624,6 @@ def resolve_and_run_event_command(
        return 2


-def _emit_event_stdout(output: str, envelope: str, native_event: str = "") -> None:
-    """Write handler stdout in the agent's context-injection shape (C13).
-
-    Mirrors the ``_emit`` helper inside the generated dispatcher template;
-    keep both in sync. Empty output emits nothing under any envelope.
-
-    *native_event* is the agent's native hookEventName, required inside
-    ``hookSpecificOutput`` by Qwen's hooks spec (and included by the
-    Claude Code hooks spec Gemini/Tabnine/Devin derive from).
-    """
-    if not output:
-        return
-    if envelope == "suppress":
-        return
-    if envelope == "hookSpecificOutput":
-        payload = {"additionalContext": output}
-        if native_event:
-            payload["hookEventName"] = native_event
-        sys.stdout.write(json.dumps({"hookSpecificOutput": payload}) + "\n")
-        return
-    if envelope == "additionalContext":
-        sys.stdout.write(json.dumps({"additionalContext": output}) + "\n")
-        return
-    if envelope == "additional_context":
-        sys.stdout.write(json.dumps({"additional_context": output}) + "\n")
-        return
-    sys.stdout.write(output)
-
-
 # -- Sourcing events map (CLI/Orchestration domain) -------------------------

 # Resolved events map: each canonical event name maps to an *ordered list* of
@@ -846,10 +737,8 @@ def resolve_events(
    if override_file.exists():
        try:
            override = yaml.safe_load(override_file.read_text(encoding="utf-8")) or {}
-        except (OSError, UnicodeError, yaml.YAMLError):
-            logger.warning(
-                "Could not read or parse %s; ignoring override", override_file
-            )
+        except yaml.YAMLError:
+            logger.warning("Could not parse %s; ignoring override", override_file)
            override = {}
        integrations = override.get("integrations", {}) if isinstance(override, dict) else {}
        if isinstance(integrations, dict) and integration_key in integrations:
@@ -1127,17 +1016,7 @@ def _dispatcher_command(
    When *timeout_seconds* is given, the resolved timeout (in the
    integration's native unit) is appended as a 4th argument so the dispatcher
    and inner runner honor the per-handler timeout instead of a fixed 120s cap
-    that would kill a handler configured for longer (S4). When omitted, a
-    default of 60s is emitted so the positional argument order
-    (command event timeout envelope native_event) stays aligned — otherwise
-    the envelope would land in the timeout slot and the dispatcher would
-    silently fall back to plain stdout.
-
-    When the integration declares a context-injection envelope for this
-    canonical event (``events_context_envelope``, C13), the envelope token is
-    appended as a 5th argument so the dispatcher wraps stdout in the JSON
-    shape the agent's hook protocol requires. Plain-passthrough agents
-    (Claude/Codex) declare no envelope and get no extra argument.
+    that would kill a handler configured for longer (S4).
    """
    if target_os == "host":
        interpreter = _resolve_interpreter(project_root)
@@ -1157,44 +1036,16 @@ def _dispatcher_command(
    # operator. Prefix & for the explicit windows target only.
    prefix = "& " if target_os == "windows" else ""
    base = f"{prefix}{q_interp} {dispatcher} {q_command} {q_event}"
-    # Always emit the timeout (4th positional arg) so the dispatcher's argv
-    # parsing stays aligned when an envelope (5th) or native_event (6th)
-    # follows. Without it the envelope would land in the timeout slot and
-    # the dispatcher would fall back to plain stdout (R3).
-    resolved_timeout = 60 if timeout_seconds is None else int(timeout_seconds)
-    # R2: the dispatcher interprets this argument as seconds, so pass the
-    # raw seconds — NOT _native_timeout(...) (which converts to ms for
-    # Gemini/Qwen/Tabnine and would yield 60000 seconds). The buffer is
-    # applied to the native hook timeout field (in the adapter formatters)
-    # so the agent's outer cap fires after the inner subprocess timeout.
-    base += f" {_shell_quote(str(resolved_timeout), target_os)}"
-    envelope = _context_envelope_for(integration, event_name)
-    if envelope:
-        base += f" {_shell_quote(envelope, target_os)}"
-        # hookSpecificOutput requires the native hookEventName inside the
-        # envelope (Qwen's hooks spec marks it mandatory; the Claude Code
-        # hooks spec that Gemini/Tabnine/Devin derive from includes it).
-        # Append the native event name as a 6th dispatcher argument so the
-        # dispatcher can populate hookEventName in the JSON output.
-        if envelope == "hookSpecificOutput":
-            native_event = getattr(integration, "CANONICAL_TO_NATIVE", {}).get(event_name, "")
-            if native_event:
-                base += f" {_shell_quote(native_event, target_os)}"
+    if timeout_seconds is not None:
+        # R2: the dispatcher interprets this argument as seconds, so pass the
+        # raw seconds — NOT _native_timeout(...) (which converts to ms for
+        # Gemini/Qwen/Tabnine and would yield 60000 seconds). The buffer is
+        # applied to the native hook timeout field (in the adapter formatters)
+        # so the agent's outer cap fires after the inner subprocess timeout.
+        base += f" {_shell_quote(str(int(timeout_seconds)), target_os)}"
    return base


-def _context_envelope_for(integration: IntegrationBase, canonical_event: str) -> str | None:
-    """Resolve the context-injection envelope for an integration + event (C13).
-
-    The event key wins; ``"*"`` is the fallback. Returns ``None`` when the
-    integration declares no envelope for the event (plain stdout passthrough).
-    """
-    mapping = getattr(integration, "events_context_envelope", None) or {}
-    if canonical_event in mapping:
-        return mapping[canonical_event]
-    return mapping.get("*")
-
-
 def install_integration_events(
    integration: IntegrationBase,
    project_root: Path,
@@ -1342,12 +1193,11 @@ def install_integration_events(
                lines.append(f'timeout = {_native_timeout(integration, cfg.get("timeout", 60) + EVENT_TIMEOUT_BUFFER)}')
                lines.append('speckit_marker = true')
                lines.append('')
-        # S5: only track when the merge wrote (skips on unreadable file).
-        if _merge_toml_fragment(config_path, "\n".join(lines)):
-            rel = str(config_path.relative_to(project_root))
-            if rel not in manifest.files:
-                manifest.record_existing(rel)
-            created.append(config_path)
+        _merge_toml_fragment(config_path, "\n".join(lines))
+        rel = str(config_path.relative_to(project_root))
+        if rel not in manifest.files:
+            manifest.record_existing(rel)
+        created.append(config_path)

    elif fmt == "json-flat":
        # Cursor hooks.json custom merge. Flat command-string entries, one
@@ -1738,14 +1588,6 @@ def _build_opencode_plugin(
    an argv array (C9). Both the ``input`` and ``output`` callback arguments
    are forwarded to ``runEvent`` (C7) so pre_tool_use can inspect tool
    arguments and post_tool_use can inspect the result.
-
-    Context-injection natives get dedicated hook bodies: for
-    ``experimental.chat.system.transform`` the handlers' concatenated stdout
-    is pushed into ``output.system`` (system-prompt injection, re-applied per
-    LLM request so the context survives compaction); for ``chat.message`` it
-    is pushed as a synthetic text part on the user message (C11). Other
-    natives keep their side-effect behavior (tool.execute.* args mutation;
-    session.* lifecycle events via the generic ``event`` hook).
    """
    event_entries: list[str] = []
    plugin_returns: list[str] = []
@@ -1760,16 +1602,11 @@ def _build_opencode_plugin(
        ev_lit = json.dumps(ev)
        native_lit = json.dumps(native)

-        is_injection = native in ("experimental.chat.system.transform", "chat.message")
-
        # Build the body: one runEvent() call per handler wrapped in try/catch,
        # forwarding both input and output (C7). An optional tool-name matcher
        # guard applies to tool.execute.* hooks. All handlers execute before
-        # any aggregate error is thrown. Injection hooks additionally collect
-        # each handler's stdout and return the concatenation.
+        # any aggregate error is thrown.
        body_lines: list[str] = ["    const errors: string[] = [];"]
-        if is_injection:
-            body_lines.append("    const contexts: string[] = [];")
        for cfg in handlers:
            command = str(cfg.get("command", ""))
            command_lit = json.dumps(command)
@@ -1791,10 +1628,6 @@ def _build_opencode_plugin(
                    body_lines.append(
                        f"    try {{ runEvent({command_lit}, {ev_lit}, input, output, {timeout_sec}); }} catch (e) {{ errors.push((e as Error).message); }}"
                    )
-            elif is_injection:
-                body_lines.append(
-                    f"    try {{ const ctx = runEvent({command_lit}, {ev_lit}, input, output, {timeout_sec}); if (ctx) contexts.push(ctx); }} catch (e) {{ errors.push((e as Error).message); }}"
-                )
            else:
                body_lines.append(
                    f"    try {{ runEvent({command_lit}, {ev_lit}, input, output, {timeout_sec}); }} catch (e) {{ errors.push((e as Error).message); }}"
@@ -1813,65 +1646,14 @@ def _build_opencode_plugin(
                f"      _{ev}(input, output);\n"
                f"    }},"
            )
-        elif native == "experimental.chat.system.transform":
-            body_lines.append('    return contexts.join("\\n\\n");')
-            event_entries.append(
-                f"function _{ev}(input: any, output: any): string {{\n"
-                + "\n".join(body_lines) + "\n"
-                "  }"
-            )
-            # OpenCode fires experimental.chat.system.transform for non-session
-            # operations (e.g. agent generation) with no sessionID. Guard so
-            # canonical session_start handlers only run when a session is
-            # present, preventing their output from being injected into
-            # internal prompts. Cache the handler output per sessionID so
-            # non-idempotent handlers (setup, telemetry, file-mutating
-            # scripts) execute once per session instead of on every LLM
-            # request; the cache is evicted on session.deleted.
-            plugin_returns.append(
-                f"    {native_lit}: async (input: any, output: any) => {{\n"
-                f"      if (!input.sessionID) return;\n"
-                f"      let ctx = sessionStartCache.get(input.sessionID);\n"
-                f"      if (ctx === undefined) {{\n"
-                f"        ctx = _{ev}(input, output);\n"
-                f"        sessionStartCache.set(input.sessionID, ctx ?? \"\");\n"
-                f"      }}\n"
-                f"      if (ctx) output.system.push(ctx);\n"
-                f"    }},"
-            )
-        elif native == "chat.message":
-            body_lines.append('    return contexts.join("\\n\\n");')
-            event_entries.append(
-                f"function _{ev}(input: any, output: any): string {{\n"
-                + "\n".join(body_lines) + "\n"
-                "  }"
-            )
-            # Part id must start with "prt" (opencode's Identifier brand): an
-            # invalid id fails the user-part schema validation and crashes the
-            # whole session (C12). Derive it from the last existing part so the
-            # brand survives an opencode prefix change, falling back to "prt_"
-            # when output.parts is empty.
-            plugin_returns.append(
-                f"    {native_lit}: async (input: any, output: any) => {{\n"
-                f"      const ctx = _{ev}(input, output);\n"
-                f"      if (!ctx) return;\n"
-                f"      const base = output.parts[output.parts.length - 1]?.id ?? \"prt_\" + Date.now().toString(36) + Math.random().toString(36).slice(2, 10);\n"
-                f"      output.parts.push({{ id: base + \".speckit\" + Math.random().toString(36).slice(2, 8), sessionID: input.sessionID, messageID: output.message.id, type: \"text\", text: ctx, synthetic: true }});\n"
-                f"    }},"
-            )
        else:
            event_entries.append(
                f"function _{ev}(input: any, output: any) {{\n"
                + "\n".join(body_lines) + "\n"
                "  }"
            )
-            # Evict the sessionStartCache when the session is deleted so the
-            # cache doesn't grow unbounded across sessions.
-            eviction = ""
-            if native == "session.deleted":
-                eviction = "if (event.sessionID) sessionStartCache.delete(event.sessionID); "
            event_handlers.append(
-                f"      if (event.type === {native_lit}) {{ {eviction}_{ev}(event, event); }}"
+                f"      if (event.type === {native_lit}) {{ _{ev}(event, event); }}"
            )

    if event_handlers:
@@ -1933,27 +1715,11 @@ def _remove_opencode_entries(config_path: Path) -> bool:
    return False


-def _merge_toml_fragment(dst: Path, fragment: str) -> bool:
-    """Merge Specify-owned TOML entries into *dst*, regenerating the file.
-
-    An unreadable or undecodable pre-existing file aborts the merge instead
-    of discarding the user's bytes, mirroring ``_load_user_json`` (#22).
-    Returns False when skipped so callers avoid tracking the untouched file
-    (S5).
-    """
+def _merge_toml_fragment(dst: Path, fragment: str) -> None:
    _ensure_safe_destination(dst)
    existing = ""
    if dst.exists():
-        try:
-            existing = dst.read_text(encoding="utf-8")
-        except (OSError, UnicodeDecodeError) as exc:
-            logger.warning(
-                "Could not read %s (it may be unreadable or not UTF-8); "
-                "skipping event-config merge to preserve user content.",
-                dst,
-            )
-            logger.debug("Read error detail: %s", exc)
-            return False
+        existing = dst.read_text(encoding="utf-8")
    existing = re.sub(
        r'\[\[hooks\.\w+\]\]\n(?:(?!\[\[hooks\.\w+\]\]).)*?speckit_marker = true\n*',
        "",
@@ -1962,7 +1728,6 @@ def _merge_toml_fragment(dst: Path, fragment: str) -> bool:
    )
    dst.parent.mkdir(parents=True, exist_ok=True)
    dst.write_text(existing.rstrip() + "\n\n" + fragment + "\n", encoding="utf-8")
-    return True


 def _remove_toml_entries(dst: Path) -> bool:
@@ -1976,19 +1741,7 @@ def _remove_toml_entries(dst: Path) -> bool:
    # the config after install can't make teardown overwrite a file outside
    # the project (the merge/write path already validates; teardown must too).
    _ensure_safe_destination(dst)
-    try:
-        existing = dst.read_text(encoding="utf-8")
-    except (OSError, UnicodeDecodeError) as exc:
-        # An unreadable or undecodable file is left untouched rather than
-        # crashing teardown — it contains only user content as far as we can
-        # tell, and the caller drops the manifest claim either way (S9).
-        logger.warning(
-            "Could not read %s (it may be unreadable or not UTF-8); "
-            "skipping event-config cleanup to preserve user content.",
-            dst,
-        )
-        logger.debug("Read error detail: %s", exc)
-        return False
+    existing = dst.read_text(encoding="utf-8")
    cleaned = re.sub(
        r'\[\[hooks\.\w+\]\]\n(?:(?!\[\[hooks\.\w+\]\]).)*?speckit_marker = true\n*',
        "",
@@ -341,25 +341,6 @@ class ExtensionManifest:
            )
        if "speckit_version" not in requires:
            raise ValidationError("Missing requires.speckit_version")
-        # Presence alone is not enough: check_compatibility() feeds this value to
-        # ``SpecifierSet(required)``, guarded only by ``except InvalidSpecifier``,
-        # which a non-string escapes two different ways. A float/int/bool/None
-        # raises TypeError from the constructor, while a list or dict is an
-        # *iterable*, so SpecifierSet accepts it and the failure surfaces much
-        # later as ``AttributeError: 'str' object has no attribute 'filter'`` from
-        # inside .contains(). Neither is a CompatibilityError, so both bypass the
-        # CLI's "Compatibility Error" handler and exit 1 with a raw traceback
-        # naming no field. An unquoted ``speckit_version: 1.0`` is an easy YAML
-        # slip. Mirrors the sibling IntegrationDescriptor, which already requires
-        # a non-empty string here.
-        if (
-            not isinstance(requires["speckit_version"], str)
-            or not requires["speckit_version"].strip()
-        ):
-            raise ValidationError(
-                "Invalid requires.speckit_version: expected a non-empty string, "
-                f"got {type(requires['speckit_version']).__name__}"
-            )

        # Validate provides section
        provides = self.data["provides"]
@@ -1870,17 +1851,6 @@ class ExtensionManager:
        required = manifest.requires_speckit_version

        # Parse version specifier (e.g., ">=0.1.0,<2.0.0")
-        # Defense in depth: the manifest validator now rejects a non-string
-        # requires.speckit_version, but this method is public and also reachable
-        # with a hand-built manifest object. ``InvalidSpecifier`` alone does not
-        # cover a non-string -- scalars raise TypeError from the constructor, and
-        # a list/dict is iterable so it constructs here and only breaks inside
-        # .contains(). Reject up front so this always reports a CompatibilityError.
-        if not isinstance(required, str):
-            raise CompatibilityError(
-                "Invalid version specifier: expected a string, got "
-                f"{type(required).__name__} ({required!r})"
-            )
        try:
            SpecifierSet(required)  # Just to validate
        except InvalidSpecifier:
@@ -2123,19 +2093,8 @@ class ExtensionManager:
                        _staged_modes = _loaded_modes
            for staged_name in sorted(staged_names):
                staged_file = rescue_staging_dir / staged_name
-                # A staged backup that cannot be read or stat'ed must not
-                # crash the retry with a raw OSError: like an uncomparable
-                # live config below, treat it as a conflict so both copies
-                # are preserved and the user resolves it while dest_dir is
-                # still untouched. Every sibling read in this path (live
-                # twin, packaged baseline, mode sidecar) already catches
-                # OSError.
-                try:
-                    staged_stat = staged_file.stat()
-                    staged_bytes = staged_file.read_bytes()
-                except OSError:
-                    conflicting.add(staged_name)
-                    continue
+                staged_stat = staged_file.stat()
+                staged_bytes = staged_file.read_bytes()
                # Prefer the sidecar-recorded mode; fall back to the staged
                # file's own mode for backwards-compat with staging dirs
                # written before the sidecar was introduced.
@@ -2227,24 +2186,10 @@ class ExtensionManager:
                        "a regular file or remove it — then reinstall."
                    )
                if cfg_file.is_file():
-                    # A kept config that cannot be read or stat'ed must not
-                    # crash the reinstall with a raw OSError — and must not
-                    # reach the rmtree below unrescued. Like the symlink
-                    # guard above, reject while dest_dir is untouched so the
-                    # preserved bytes are never lost.
-                    try:
-                        stranded_configs[cfg_file.name] = (
-                            cfg_file.read_bytes(),
-                            cfg_file.stat().st_mode,
-                        )
-                    except OSError as exc:
-                        raise ValidationError(
-                            "Preserved extension config for "
-                            f"'{manifest.id}' cannot be read "
-                            f"({cfg_file.name}) in {dest_dir}: {exc}. "
-                            "Resolve manually — fix its permissions or "
-                            "remove it — then reinstall."
-                        ) from exc
+                    stranded_configs[cfg_file.name] = (
+                        cfg_file.read_bytes(),
+                        cfg_file.stat().st_mode,
+                    )

        if stranded_configs and not staging_is_complete:
            # Write a durable backup outside dest_dir before any
@@ -70,8 +70,8 @@ def with_integration_setting(
    # ``script_type`` changes (``parsed_options`` and ``raw_options`` both
    # None), the previously-stored ``parsed_options`` are retained above, so
    # deriving the separator from the argument (None) would drop an
-    # options-dependent separator (e.g. Copilot ``--commands`` -> ".") back to
-    # the default "-".
+    # options-dependent separator (e.g. Copilot ``--skills`` -> "-") back to
+    # the default ".".
    current["invoke_separator"] = integration.effective_invoke_separator(
        current.get("parsed_options"), project_root
    )
@@ -331,14 +331,6 @@ def integration_switch(

    selected_script = _resolve_script_type(project_root, script)

-    # Resolve and validate target options before uninstalling the current
-    # integration. Invalid options must not leave the project partially
-    # switched with the previous integration already removed.
-    target_raw_options, target_parsed_options = _resolve_integration_options(
-        target_integration, current, target, integration_options
-    )
-    target_integration.is_skills_mode(target_parsed_options, project_root)
-
    # Phase 1: Uninstall current integration (if any)
    if installed_key:
        current_integration = get_integration(installed_key)
@@ -411,10 +403,7 @@ def integration_switch(
            fallback_key = installed_keys[0]
            fallback_integration = get_integration(fallback_key)
            if fallback_integration is not None:
-                (
-                    fallback_raw_options,
-                    fallback_parsed_options,
-                ) = _resolve_integration_options(
+                raw_options, parsed_options = _resolve_integration_options(
                    fallback_integration, current, fallback_key, None
                )
                _set_default_integration_or_exit(
@@ -423,8 +412,8 @@ def integration_switch(
                    fallback_key,
                    fallback_integration,
                    installed_keys,
-                    raw_options=fallback_raw_options,
-                    parsed_options=fallback_parsed_options,
+                    raw_options=raw_options,
+                    parsed_options=parsed_options,
                )
            else:
                _write_integration_json(
@@ -434,6 +423,13 @@ def integration_switch(
            _remove_integration_json(project_root)
        current = _read_integration_json(project_root)

+    # Build parsed options from --integration-options so the integration
+    # can determine its effective invoke separator before shared infra
+    # is installed.
+    raw_options, parsed_options = _resolve_integration_options(
+        target_integration, current, target, integration_options
+    )
+
    # Refresh shared infrastructure to the current CLI version. Switching
    # integrations is exactly when stale vendored shared scripts (e.g.
    # update-agent-context.sh that pre-dates the target integration's
@@ -449,11 +445,11 @@ def integration_switch(
        force=refresh_shared_infra,
        refresh_managed=True,
        invoke_separator=_invoke_separator_for_integration(
-            target_integration, current, target, target_parsed_options,
+            target_integration, current, target, parsed_options,
            project_root=project_root,
        ),
        invoke_prefix=_invoke_prefix_for_integration(
-            target_integration, target, target_parsed_options, project_root
+            target_integration, target, parsed_options, project_root
        ),
        refresh_hint=(
            "To overwrite customizations, re-run with "
@@ -475,14 +471,14 @@ def integration_switch(
        target_integration.key,
        target_integration.config,
        project_root,
-        target_parsed_options,
+        parsed_options,
    )
    try:
        target_integration.setup(
            project_root, manifest,
-            parsed_options=target_parsed_options,
+            parsed_options=parsed_options,
            script_type=selected_script,
-            raw_options=target_raw_options,
+            raw_options=raw_options,
            events=events_map,
        )
        manifest.save()
@@ -493,8 +489,8 @@ def integration_switch(
            target_integration,
            _dedupe_integration_keys([*installed_keys, target_integration.key]),
            script_type=selected_script,
-            raw_options=target_raw_options,
-            parsed_options=target_parsed_options,
+            raw_options=raw_options,
+            parsed_options=parsed_options,
        )

    except Exception as exc:
@@ -225,8 +225,8 @@ class IntegrationBase(ABC):
        on-disk layout to avoid silently migrating an existing project to a
        different mode.  The default ignores it.

-        The default for command-first integrations is skills mode only when
-        ``--skills`` was requested.
+        The default (command-first integrations, e.g. Copilot's default
+        layout) is skills mode only when ``--skills`` was requested.
        ``SkillsIntegration`` overrides this to return ``True`` by default;
        skills-first integrations that expose a legacy opt-out (e.g. Bob)
        override it to honor their own flag.
@@ -957,20 +957,6 @@ class IntegrationBase(ABC):
        """Return True if this integration supports agent-native events."""
        return bool(getattr(self, "CANONICAL_TO_NATIVE", None) and getattr(self, "events_config_file", None))

-    # Context-injection envelope for hook stdout, keyed by canonical event
-    # (with "*" as the fallback). Not every agent injects a hook's plain-text
-    # stdout as model context: Gemini/Tabnine/Qwen/Devin are JSON-only
-    # protocols (plain text becomes user-facing noise), Copilot discards
-    # non-JSON stdout, and Cursor parses stdout as JSON. Values:
-    #   "hookSpecificOutput" → {"hookSpecificOutput": {"additionalContext": ...}}
-    #   "additionalContext"  → {"additionalContext": ...}   (top-level, Copilot)
-    #   "additional_context" → {"additional_context": ...}  (top-level, Cursor)
-    #   "suppress"           → emit nothing (strict-JSON agents on events whose
-    #                          output can't be used)
-    # Absent (no matching key and no "*") → plain stdout passthrough
-    # (Claude/Codex inject plain stdout; opencode injects via its TS plugin).
-    events_context_envelope: dict[str, str] = {}
-
    # -- Convenience helpers for subclasses -------------------------------

    def install(
@@ -1,19 +1,13 @@
 """Copilot integration — GitHub Copilot in VS Code.

-Copilot supports two layouts:
- Skills are the default and use ``speckit-<name>/SKILL.md`` directories under
-  ``.github/skills/``
- ``--commands`` uses ``.agent.md`` files, companion ``.prompt.md`` files, and
-  a VS Code settings merge
-
-The two modes are mutually exclusive. The commands layout remains supported,
-but is no longer the preferred default.
-
-The commands layout has several unique behaviors compared to standard markdown
-agents:
+Copilot has several unique behaviors compared to standard markdown agents:
 - Commands use ``.agent.md`` extension (not ``.md``)
 - Each command gets a companion ``.prompt.md`` file in ``.github/prompts/``
 - Installs ``.vscode/settings.json`` with prompt file recommendations
+
+When ``--skills`` is passed via ``--integration-options``, Copilot scaffolds
+commands as ``speckit-<name>/SKILL.md`` directories under ``.github/skills/``
+instead.  The two modes are mutually exclusive.
 """

 from __future__ import annotations
@@ -25,24 +19,9 @@ import warnings
 from pathlib import Path
 from typing import Any

-import typer
-
 from ..base import IntegrationBase, IntegrationOption, SkillsIntegration
 from ..manifest import IntegrationManifest

-_COPILOT_CORE_COMMANDS = {
-    "analyze",
-    "checklist",
-    "clarify",
-    "constitution",
-    "converge",
-    "implement",
-    "plan",
-    "specify",
-    "tasks",
-    "taskstoissues",
-}
-

 def _copilot_executable() -> str:
    """Return the executable name for Copilot CLI on this platform.
@@ -78,24 +57,22 @@ def _allow_all() -> bool:
    return True


-def _validate_mode_options(parsed_options: dict[str, Any] | None) -> None:
-    """Reject the two explicit Copilot layout selectors used together."""
-    opts = parsed_options or {}
-    if opts.get("skills") and opts.get("commands"):
-        from ..._console import console
-
-        console.print(
-            "[red]Error:[/red] --skills and --commands are mutually exclusive; "
-            "pass only one."
-        )
-        raise typer.Exit(1)
+def _warn_legacy_markdown_default() -> None:
+    """Warn that Copilot's default markdown scaffold is being phased out."""
+    warnings.warn(
+        "Copilot legacy markdown mode is deprecated and will stop being the "
+        'default in a future Spec Kit release; pass --integration-options "--skills" '
+        "to opt in to Copilot skills mode now.",
+        UserWarning,
+        stacklevel=3,
+    )


 class _CopilotSkillsHelper(SkillsIntegration):
    """Internal helper used when Copilot is scaffolded in skills mode.

-    Not registered in the integration registry — only used as the default
-    skills-layout delegate by ``CopilotIntegration``.
+    Not registered in the integration registry — only used as a delegate
+    by ``CopilotIntegration`` when ``--skills`` is passed.
    """

    key = "copilot"
@@ -117,11 +94,13 @@ class _CopilotSkillsHelper(SkillsIntegration):
 class CopilotIntegration(IntegrationBase):
    """Integration for GitHub Copilot (VS Code IDE + CLI).

-    The default IDE integration (``requires_cli: False``) installs skills under
-    ``.github/skills/``. Pass ``--commands`` via ``--integration-options`` to
-    install the supported ``.agent.md`` + ``.prompt.md`` layout instead.
-    Workflow dispatch additionally requires the ``copilot`` CLI to be installed
-    separately.
+    The IDE integration (``requires_cli: False``) installs ``.agent.md``
+    command files.  Workflow dispatch additionally requires the
+    ``copilot`` CLI to be installed separately.
+
+    When ``--skills`` is passed via ``--integration-options``, commands
+    are scaffolded as ``speckit-<name>/SKILL.md`` under ``.github/skills/``
+    instead of the default ``.agent.md`` + ``.prompt.md`` layout.
    """

    key = "copilot"
@@ -138,7 +117,6 @@ class CopilotIntegration(IntegrationBase):
        "args": "$ARGUMENTS",
        "extension": ".agent.md",
    }
-    invoke_separator = "-"

    CANONICAL_TO_NATIVE = {
        "session_start": "sessionStart",
@@ -152,101 +130,40 @@ class CopilotIntegration(IntegrationBase):
    }
    events_config_file = ".github/hooks/speckit.json"
    events_format = "copilot-json"
-    # Copilot sessionStart and userPromptSubmitted inject a top-level
-    # additionalContext field into the model-facing prompt (C13). Non-JSON
-    # stdout is discarded harmlessly by Copilot on other events, so no other
-    # event needs an envelope.
-    events_context_envelope = {
-        "session_start": "additionalContext",
-        "user_prompt_submit": "additionalContext",
-    }

    # Mutable flag set by setup() — indicates the active scaffolding mode.
-    _skills_mode: bool = True
+    _skills_mode: bool = False

    def effective_invoke_separator(
        self,
        parsed_options: dict[str, Any] | None = None,
        project_root: Path | None = None,
    ) -> str:
-        """Return the separator for the resolved Copilot layout."""
-        return "-" if self.is_skills_mode(parsed_options, project_root) else "."
+        """Return ``"-"`` when skills mode is requested, ``"."`` otherwise."""
+        if parsed_options and parsed_options.get("skills"):
+            return "-"
+        if self._skills_mode:
+            return "-"
+        return self.invoke_separator

    def is_skills_mode(
        self,
        parsed_options: dict[str, Any] | None = None,
        project_root: Path | None = None,
    ) -> bool:
-        """Copilot defaults to skills; ``--commands`` opts into commands mode.
+        """Copilot is skills mode when ``--skills`` was requested.

-        Explicit flags override on-disk detection. Without a flag, existing
-        projects retain their managed Spec Kit layout while fresh projects use
-        skills. This prevents ``use`` and ``upgrade`` from silently migrating
-        projects created before skills became the default.
+        On the init path ``setup()`` has already recorded the choice in
+        ``self._skills_mode``; on the ``use``/``install`` path (where no
+        ``setup()`` runs) the signal comes from *parsed_options* (#3550), which
+        round-trips because ``--skills`` is persisted in the stored options.
        """
-        opts = parsed_options or {}
-        _validate_mode_options(opts)
-        if opts.get("skills"):
+        if parsed_options and parsed_options.get("skills"):
            return True
-        if opts.get("commands"):
-            return False
-        if project_root is not None:
-            project_root = Path(project_root)
-            manifest_path = (
-                project_root
-                / ".specify"
-                / "integrations"
-                / "copilot.manifest.json"
-            )
-            if manifest_path.is_file():
-                try:
-                    manifest_files = IntegrationManifest.load(
-                        self.key, Path(project_root)
-                    ).files
-                except (OSError, ValueError):
-                    manifest_files = None
-                if manifest_files is not None and any(
-                    path.startswith(".github/skills/speckit-")
-                    and path.endswith("/SKILL.md")
-                    for path in manifest_files
-                ):
-                    return True
-                if manifest_files is not None and any(
-                    path.startswith(".github/agents/speckit.")
-                    and path.endswith(".agent.md")
-                    for path in manifest_files
-                ):
-                    return False
-
-            github_dir = project_root / ".github"
-            has_managed_skills = any(
-                (
-                    github_dir
-                    / "skills"
-                    / f"speckit-{command}"
-                    / "SKILL.md"
-                ).is_file()
-                for command in _COPILOT_CORE_COMMANDS
-            )
-            has_managed_commands = any(
-                (
-                    github_dir
-                    / "agents"
-                    / f"speckit.{command}.agent.md"
-                ).is_file()
-                or (
-                    github_dir
-                    / "prompts"
-                    / f"speckit.{command}.prompt.md"
-                ).is_file()
-                for command in _COPILOT_CORE_COMMANDS
-            )
-            if has_managed_commands and not has_managed_skills:
-                return False
-        return True
+        return self._skills_mode

    def invoke_separator_for_mode(self, skills_enabled: bool) -> str:
-        """Skills projects render ``/speckit-<cmd>``; commands use ``.``.
+        """Skills projects render ``/speckit-<cmd>``; default markdown ``.``.

        Copilot is dual-layout, so — like Bob — the command-reference
        separator depends on the persisted ``ai_skills`` state rather than a
@@ -254,7 +171,7 @@ class CopilotIntegration(IntegrationBase):
        Copilot skills project consistent with ``build_command_invocation``
        (which emits ``/speckit-<stem>``).
        """
-        return "-" if skills_enabled else "."
+        return "-" if skills_enabled else self.invoke_separator

    @classmethod
    def options(cls) -> list[IntegrationOption]:
@@ -267,22 +184,7 @@ class CopilotIntegration(IntegrationBase):
                "--skills",
                is_flag=True,
                default=False,
-                help=(
-                    "Force the default skills layout (.github/skills/), "
-                    "overriding on-disk auto-detection"
-                ),
-            ),
-        )
-        opts.append(
-            IntegrationOption(
-                "--commands",
-                is_flag=True,
-                default=False,
-                help=(
-                    "Scaffold .github/agents/*.agent.md commands with companion "
-                    ".github/prompts/*.prompt.md files instead of the default "
-                    "skills layout"
-                ),
+                help="Scaffold commands as agent skills (speckit-<name>/SKILL.md) instead of .agent.md files",
            ),
        )
        return opts
@@ -326,8 +228,8 @@ class CopilotIntegration(IntegrationBase):
    def build_command_invocation(self, command_name: str, args: str = "") -> str:
        """Build the native invocation for a Copilot command.

-        Commands mode: agents are not slash-commands — return args as prompt.
-        Skills mode (default): ``/speckit-<stem>`` slash-command dispatch.
+        Default mode: agents are not slash-commands — return args as prompt.
+        Skills mode: ``/speckit-<stem>`` slash-command dispatch.
        """
        if self._skills_mode:
            stem = command_name
@@ -364,11 +266,15 @@ class CopilotIntegration(IntegrationBase):
        if stem.startswith("speckit."):
            stem = stem[len("speckit."):]

-        skills_mode = (
-            self.is_skills_mode(project_root=project_root)
-            if project_root
-            else self._skills_mode
-        )
+        # Detect skills mode from project layout when not set via setup()
+        skills_mode = self._skills_mode
+        if not skills_mode and project_root:
+            skills_dir = project_root / ".github" / "skills"
+            if skills_dir.is_dir():
+                skills_mode = any(
+                    d.is_dir() and (d / "SKILL.md").is_file()
+                    for d in skills_dir.glob("speckit-*")
+                )

        if skills_mode:
            prompt = "/speckit-" + stem.replace(".", "-")
@@ -460,18 +366,20 @@ class CopilotIntegration(IntegrationBase):
        parsed_options: dict[str, Any] | None = None,
        **opts: Any,
    ) -> list[Path]:
-        """Install Copilot skills or the opt-in commands layout.
+        """Install copilot commands, companion prompts, and VS Code settings.

-        Skills are the default. ``parsed_options["commands"]`` selects
-        ``.agent.md`` files, companion prompts, and the VS Code settings merge.
-        Existing managed command layouts are preserved when no mode is explicit.
+        When ``parsed_options["skills"]`` is truthy, delegates to skills
+        scaffolding (``speckit-<name>/SKILL.md`` under ``.github/skills/``).
+        Otherwise uses the default ``.agent.md`` + ``.prompt.md`` layout.
        """
        parsed_options = parsed_options or {}
-        self._skills_mode = self.is_skills_mode(parsed_options, project_root)
+        self._skills_mode = bool(parsed_options.get("skills"))
        if self._skills_mode:
            created = self._setup_skills(project_root, manifest, parsed_options, **opts)
        else:
-            created = self._setup_commands(project_root, manifest, parsed_options, **opts)
+            if "skills" not in parsed_options:
+                _warn_legacy_markdown_default()
+            created = self._setup_default(project_root, manifest, parsed_options, **opts)

        # Install agent runtime events
        event_files = self.emit_events(
@@ -480,14 +388,14 @@ class CopilotIntegration(IntegrationBase):
        created.extend(event_files)
        return created

-    def _setup_commands(
+    def _setup_default(
        self,
        project_root: Path,
        manifest: IntegrationManifest,
        parsed_options: dict[str, Any] | None = None,
        **opts: Any,
    ) -> list[Path]:
-        """Commands mode: .agent.md + .prompt.md + VS Code settings merge."""
+        """Default mode: .agent.md + .prompt.md + VS Code settings merge."""
        project_root_resolved = project_root.resolve()
        if manifest.project_root != project_root_resolved:
            raise ValueError(
@@ -48,14 +48,6 @@ class CursorAgentIntegration(SkillsIntegration):
    }
    events_config_file = ".cursor/hooks.json"
    events_format = "json-flat"
-    # Cursor sessionStart injects a top-level additional_context (snake_case)
-    # field (C13). beforeSubmitPrompt has no context output field (block/allow
-    # only), and plain text on any hook fails Cursor's JSON parse — suppress
-    # everything else.
-    events_context_envelope = {
-        "*": "suppress",
-        "session_start": "additional_context",
-    }

    def build_exec_args(
        self,
@@ -44,13 +44,6 @@ class DevinIntegration(SkillsIntegration):
    # top-level "hooks" wrapper (U2), unlike the settings.json formats. The
    # json-root-nested writer/remover operate directly on the root event keys.
    events_format = "json-root-nested"
-    # Devin's hooks protocol is JSON-stdout; additionalContext is the
-    # documented injection field for SessionStart/UserPromptSubmit (C13).
-    events_context_envelope = {
-        "*": "suppress",
-        "session_start": "hookSpecificOutput",
-        "user_prompt_submit": "hookSpecificOutput",
-    }

    def build_exec_args(
        self,
@@ -33,15 +33,6 @@ class GeminiIntegration(TomlIntegration):
    }
    events_config_file = ".gemini/settings.json"
    events_format = "json-nested"
-    # Gemini mandates JSON-only hook stdout ("silence is mandatory"): plain
-    # text becomes a user-facing systemMessage, never context. Inject via
-    # hookSpecificOutput.additionalContext on the two context events and
-    # suppress stdout everywhere else (C13).
-    events_context_envelope = {
-        "*": "suppress",
-        "session_start": "hookSpecificOutput",
-        "user_prompt_submit": "hookSpecificOutput",
-    }
    # Gemini measures hook timeouts in milliseconds, unlike Claude/Cursor/Codex
    # which use seconds. The shared formatter converts via _native_timeout (#7)
    # so the default 60s becomes 60000ms instead of terminating the dispatcher
@@ -23,15 +23,7 @@ class OpencodeIntegration(MarkdownIntegration):
    CANONICAL_TO_NATIVE = {
        "pre_tool_use": "tool.execute.before",
        "post_tool_use": "tool.execute.after",
-        # session_start maps to the system-prompt transform hook (not the
-        # session.created event) so the handler's stdout is injected into the
-        # system prompt — session.created has no output channel. The hook
-        # fires per LLM request, which keeps the context present across
-        # compaction at the cost of running the handler per turn.
-        "session_start": "experimental.chat.system.transform",
-        # user_prompt_submit maps to chat.message so handler stdout is
-        # injected as a synthetic text part on the user's message.
-        "user_prompt_submit": "chat.message",
+        "session_start": "session.created",
        "session_end": "session.deleted",
    }
    events_config_file = "opencode.json"
@@ -30,12 +30,6 @@ class QwenIntegration(MarkdownIntegration):
    }
    events_config_file = ".qwen/settings.json"
    events_format = "json-nested"
-    # Qwen hooks are a JSON stdin/stdout protocol (Gemini-derived) (C13).
-    events_context_envelope = {
-        "*": "suppress",
-        "session_start": "hookSpecificOutput",
-        "user_prompt_submit": "hookSpecificOutput",
-    }
    # Qwen Code's command hooks measure timeout in milliseconds (default
    # 60000), per the Qwen Code hooks documentation. Declaring the unit makes
    # the shared formatter convert the 60s default to 60000ms instead of
@@ -33,12 +33,6 @@ class TabnineIntegration(TomlIntegration):
    }
    events_config_file = ".tabnine/agent/settings.json"
    events_format = "json-nested"
-    # Tabnine is Gemini-hooks-compatible (JSON-only stdout) (C13).
-    events_context_envelope = {
-        "*": "suppress",
-        "session_start": "hookSpecificOutput",
-        "user_prompt_submit": "hookSpecificOutput",
-    }
    # Tabnine mirrors Gemini's hook schema (BeforeTool/AfterTool) and, like
    # Gemini, measures hook timeouts in milliseconds. Declaring the unit makes
    # the shared formatter convert the 60s default to 60000ms instead of
@@ -344,25 +344,6 @@ class PresetManifest:
        requires = self.data["requires"]
        if "speckit_version" not in requires:
            raise PresetValidationError("Missing requires.speckit_version")
-        # Presence alone is not enough: check_compatibility() feeds this value to
-        # ``SpecifierSet(required)``, guarded only by ``except InvalidSpecifier``,
-        # which a non-string escapes two different ways. A float/int/bool/None
-        # raises TypeError from the constructor, while a list or dict is an
-        # *iterable*, so SpecifierSet accepts it and the failure surfaces much
-        # later as ``AttributeError: 'str' object has no attribute 'filter'`` from
-        # inside .contains(). Neither is a PresetCompatibilityError, so both
-        # bypass the CLI's "Compatibility Error" handler and exit 1 with a raw
-        # traceback naming no field. An unquoted ``speckit_version: 1.0`` is an
-        # easy YAML slip. Mirrors the sibling IntegrationDescriptor, which already
-        # requires a non-empty string here.
-        if (
-            not isinstance(requires["speckit_version"], str)
-            or not requires["speckit_version"].strip()
-        ):
-            raise PresetValidationError(
-                "Invalid requires.speckit_version: expected a non-empty string, "
-                f"got {type(requires['speckit_version']).__name__}"
-            )

        # Validate provides section
        provides = self.data["provides"]
@@ -550,12 +531,7 @@ class PresetRegistry:
            if not isinstance(data.get("presets"), dict):
                data["presets"] = {}
            return data
-        except (json.JSONDecodeError, UnicodeDecodeError, FileNotFoundError):
-            # Corrupted or missing registry, start fresh. A registry whose
-            # bytes cannot be decoded as UTF-8 is the same corruption class
-            # as malformed JSON — only the exception type differs. OSError is
-            # deliberately not caught: the data may be intact on disk, and
-            # starting fresh would let a later _save() wipe it.
+        except (json.JSONDecodeError, FileNotFoundError):
            return {
                "schema_version": self.SCHEMA_VERSION,
                "presets": {}
@@ -780,18 +756,6 @@ class PresetManager:
            PresetCompatibilityError: If pack is incompatible
        """
        required = manifest.requires_speckit_version
-        # Defense in depth: the manifest validator now rejects a non-string
-        # requires.speckit_version, but this method is public and also reachable
-        # with a hand-built manifest object. ``InvalidSpecifier`` alone does not
-        # cover a non-string -- scalars raise TypeError from the constructor, and
-        # a list/dict is iterable so it constructs here and only breaks inside
-        # .contains(). Reject up front so this always reports a
-        # PresetCompatibilityError.
-        if not isinstance(required, str):
-            raise PresetCompatibilityError(
-                "Invalid version specifier: expected a string, got "
-                f"{type(required).__name__} ({required!r})"
-            )
        try:
            SpecifierSet(required)  # Just to validate
        except InvalidSpecifier:
@@ -761,11 +761,6 @@ class RunState:
                "Invalid run state: missing required field(s): "
                + ", ".join(missing_fields)
            )
-        if state_data["run_id"] != run_id:
-            raise ValueError(
-                f"Invalid run state: stored run_id {state_data['run_id']!r} "
-                f"does not match requested run_id {run_id!r}"
-            )

        workflow_id = state_data["workflow_id"]
        if not isinstance(workflow_id, str) or not _ID_PATTERN.fullmatch(
@@ -1710,13 +1705,8 @@ class WorkflowEngine:
                continue
            state_path = run_dir / "state.json"
            if state_path.exists():
-                try:
-                    with open(state_path, encoding="utf-8") as f:
-                        state_data = json.load(f)
-                except (json.JSONDecodeError, OSError, UnicodeDecodeError):
-                    continue
-                if not isinstance(state_data, dict) or "run_id" not in state_data:
-                    continue
+                with open(state_path, encoding="utf-8") as f:
+                    state_data = json.load(f)
                runs.append(state_data)
        return runs

@@ -69,11 +69,8 @@ class TestInitIntegrationFlag:
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0, f"init failed: {result.output}"
-        assert (
-            project / ".github" / "skills" / "speckit-plan" / "SKILL.md"
-        ).exists()
-        assert not (project / ".github" / "agents").exists()
-        assert not (project / ".github" / "prompts").exists()
+        assert (project / ".github" / "agents" / "speckit.plan.agent.md").exists()
+        assert (project / ".github" / "prompts" / "speckit.plan.prompt.md").exists()
        assert (project / ".specify" / "scripts" / "bash" / "common.sh").exists()

        data = json.loads((project / ".specify" / "integration.json").read_text(encoding="utf-8"))
@@ -81,7 +78,6 @@ class TestInitIntegrationFlag:

        opts = json.loads((project / ".specify" / "init-options.json").read_text(encoding="utf-8"))
        assert opts["integration"] == "copilot"
-        assert opts["ai_skills"] is True
        # init must not leave any legacy agent-context keys in init-options.json
        assert "context_file" not in opts

@@ -115,9 +111,7 @@ class TestInitIntegrationFlag:

        assert result.exit_code == 0, result.output
        assert f"defaulting to '{specify_cli.DEFAULT_INIT_INTEGRATION}'" in result.output
-        assert (
-            project / ".github" / "skills" / "speckit-plan" / "SKILL.md"
-        ).exists()
+        assert (project / ".github" / "agents" / "speckit.plan.agent.md").exists()

        data = json.loads((project / ".specify" / "integration.json").read_text(encoding="utf-8"))
        assert data["integration"] == specify_cli.DEFAULT_INIT_INTEGRATION
@@ -256,9 +250,7 @@ class TestInitIntegrationFlag:
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0
-        assert (
-            project / ".github" / "skills" / "speckit-plan" / "SKILL.md"
-        ).exists()
+        assert (project / ".github" / "agents" / "speckit.plan.agent.md").exists()

    def test_init_optional_preset_failure_reports_target_and_continues(
        self, tmp_path, monkeypatch
@@ -1381,7 +1373,7 @@ class TestSharedInfraCommandRefs:
        assert "/speckit.specify" not in script_content

    def test_full_init_copilot_resolves_page_templates(self, tmp_path):
-        """Default Copilot skills mode produces hyphen refs in page templates."""
+        """Full CLI init with Copilot (markdown agent) produces dot refs in page templates."""
        from typer.testing import CliRunner
        from specify_cli import app

@@ -1403,28 +1395,27 @@ class TestSharedInfraCommandRefs:

        plan = project / ".specify" / "templates" / "plan-template.md"
        content = plan.read_text(encoding="utf-8")
-        assert "/speckit-plan" in content, "Copilot skills should use /speckit-plan"
-        assert "/speckit.plan" not in content
+        assert "/speckit.plan" in content, "Copilot (markdown) should use /speckit.plan"
        assert "__SPECKIT_COMMAND_" not in content

        script_content = self._combined_script_content(project, "sh")
-        assert "/speckit-specify" in script_content
-        assert "/speckit.specify" not in script_content
+        assert "/speckit.specify" in script_content
+        assert "/speckit-specify" not in script_content

-    def test_full_init_copilot_commands_resolves_page_templates(self, tmp_path):
-        """Copilot --commands produces dot refs in page templates."""
+    def test_full_init_copilot_skills_resolves_page_templates(self, tmp_path):
+        """Full CLI init with Copilot --skills produces hyphen refs in page templates."""
        from typer.testing import CliRunner
        from specify_cli import app

        runner = CliRunner()
-        project = tmp_path / "init-copilot-commands"
+        project = tmp_path / "init-copilot-skills"
        old_cwd = os.getcwd()
        try:
            os.chdir(tmp_path)
            result = runner.invoke(app, [
                "init", str(project),
                "--integration", "copilot",
-                "--integration-options", "--commands",
+                "--integration-options", "--skills",
                "--script", "sh",
                "--ignore-agent-tools",
            ], catch_exceptions=False)
@@ -1435,13 +1426,13 @@ class TestSharedInfraCommandRefs:

        plan = project / ".specify" / "templates" / "plan-template.md"
        content = plan.read_text(encoding="utf-8")
-        assert "/speckit.plan" in content, "Copilot --commands should use /speckit.plan"
-        assert "/speckit-plan" not in content
+        assert "/speckit-plan" in content, "Copilot --skills should use /speckit-plan"
+        assert "/speckit.plan" not in content, "dot-notation leaked into Copilot skills page template"
        assert "__SPECKIT_COMMAND_" not in content

        script_content = self._combined_script_content(project, "sh")
-        assert "/speckit.specify" in script_content
-        assert "/speckit-specify" not in script_content
+        assert "/speckit-specify" in script_content
+        assert "/speckit.specify" not in script_content


 class TestIntegrationCatalogDiscoveryCLI:
@@ -128,23 +128,6 @@ class TestResolveEvents:
        )
        assert result == {}

-    def test_unreadable_yaml_override_keeps_prior_layers(self, tmp_path):
-        """An unreadable override is ignored like malformed YAML."""
-        override_file = tmp_path / ".specify" / "integration-events.yml"
-        override_file.parent.mkdir(parents=True, exist_ok=True)
-        override_file.write_bytes(b"\xff\xfe")
-
-        result = resolve_events(
-            "claude",
-            {"events": {"post_tool_use": {"command": "speckit.tdd.validate"}}},
-            tmp_path,
-            None,
-        )
-
-        assert result == {
-            "post_tool_use": [{"command": "speckit.tdd.validate"}]
-        }
-
    def test_no_config_no_events(self, tmp_path):
        """Safe fallback with empty config/options."""
        result = resolve_events("claude", None, tmp_path, None)
@@ -251,8 +234,6 @@ class TestCanonicalEventMapping:
        integration = OpencodeIntegration()
        assert integration.supports_events() is True
        assert integration.CANONICAL_TO_NATIVE["pre_tool_use"] == "tool.execute.before"
-        assert integration.CANONICAL_TO_NATIVE["session_start"] == "experimental.chat.system.transform"
-        assert integration.CANONICAL_TO_NATIVE["user_prompt_submit"] == "chat.message"
        assert "stop" not in integration.CANONICAL_TO_NATIVE

    def test_copilot_mapping(self):
@@ -673,104 +654,6 @@ class TestCopilotAgentStop:

 # -- Shell quoting & matcher escaping (R2, R4) -------------------------------

-class TestContextInjectionEnvelopes:
-    """C13: context-injection envelope resolution and emission."""
-
-    def test_emit_event_stdout_wrapping(self, capsys):
-        from specify_cli.events import _emit_event_stdout
-
-        _emit_event_stdout("hello ctx", "plain")
-        assert capsys.readouterr().out == "hello ctx"
-
-        # hookSpecificOutput without native_event: no hookEventName (backward
-        # compat for callers that don't pass it).
-        _emit_event_stdout("hello ctx", "hookSpecificOutput")
-        assert json.loads(capsys.readouterr().out.strip()) == {
-            "hookSpecificOutput": {"additionalContext": "hello ctx"}
-        }
-
-        # hookSpecificOutput with native_event: hookEventName included
-        # (required by Qwen's hooks spec; derived from Claude Code's).
-        _emit_event_stdout("hello ctx", "hookSpecificOutput", "SessionStart")
-        assert json.loads(capsys.readouterr().out.strip()) == {
-            "hookSpecificOutput": {
-                "additionalContext": "hello ctx",
-                "hookEventName": "SessionStart",
-            }
-        }
-
-        _emit_event_stdout("hello ctx", "additionalContext")
-        assert json.loads(capsys.readouterr().out.strip()) == {
-            "additionalContext": "hello ctx"
-        }
-
-        _emit_event_stdout("hello ctx", "additional_context")
-        assert json.loads(capsys.readouterr().out.strip()) == {
-            "additional_context": "hello ctx"
-        }
-
-        _emit_event_stdout("hello ctx", "suppress")
-        assert capsys.readouterr().out == ""
-
-        # Empty output emits nothing under any envelope.
-        _emit_event_stdout("", "additionalContext")
-        assert capsys.readouterr().out == ""
-
-    def test_envelope_resolution_and_command_formatting(self):
-        from specify_cli.events import _dispatcher_command, _context_envelope_for
-        from specify_cli.integrations.gemini import GeminiIntegration
-        from specify_cli.integrations.qwen import QwenIntegration
-        from specify_cli.integrations.copilot import CopilotIntegration
-        from specify_cli.integrations.cursor_agent import CursorAgentIntegration
-        from specify_cli.integrations.claude import ClaudeIntegration
-        from specify_cli.integrations.codex import CodexIntegration
-
-        gemini = GeminiIntegration()
-        assert _context_envelope_for(gemini, "session_start") == "hookSpecificOutput"
-        assert _context_envelope_for(gemini, "user_prompt_submit") == "hookSpecificOutput"
-        assert _context_envelope_for(gemini, "pre_tool_use") == "suppress"
-
-        # hookSpecificOutput appends the native event name as a 6th dispatcher
-        # argument so the dispatcher can populate hookEventName. The default
-        # timeout (60s) is always emitted as the 4th arg to keep positional
-        # alignment (R3).
-        cmd_gemini_start = _dispatcher_command(gemini, Path("/proj"), "speckit.boot", "session_start")
-        assert cmd_gemini_start.endswith(" 60 hookSpecificOutput SessionStart")
-
-        cmd_gemini_prompt = _dispatcher_command(gemini, Path("/proj"), "speckit.prompt", "user_prompt_submit")
-        assert cmd_gemini_prompt.endswith(" 60 hookSpecificOutput BeforeAgent")
-
-        cmd_gemini_tool = _dispatcher_command(gemini, Path("/proj"), "speckit.guard", "pre_tool_use")
-        assert cmd_gemini_tool.endswith(" 60 suppress")
-
-        # Qwen uses the same hookSpecificOutput protocol with its own native
-        # event names; verify hookEventName threading for Qwen's CamelCase names.
-        qwen = QwenIntegration()
-        cmd_qwen_start = _dispatcher_command(qwen, Path("/proj"), "speckit.boot", "session_start")
-        assert cmd_qwen_start.endswith(" 60 hookSpecificOutput SessionStart")
-        cmd_qwen_prompt = _dispatcher_command(qwen, Path("/proj"), "speckit.prompt", "user_prompt_submit")
-        assert cmd_qwen_prompt.endswith(" 60 hookSpecificOutput UserPromptSubmit")
-
-        copilot = CopilotIntegration()
-        assert _context_envelope_for(copilot, "session_start") == "additionalContext"
-        assert _context_envelope_for(copilot, "user_prompt_submit") == "additionalContext"
-        cmd_copilot_start = _dispatcher_command(copilot, Path("/proj"), "speckit.boot", "session_start")
-        assert cmd_copilot_start.endswith(" 60 additionalContext")
-        cmd_copilot_prompt = _dispatcher_command(copilot, Path("/proj"), "speckit.prompt", "user_prompt_submit")
-        assert cmd_copilot_prompt.endswith(" 60 additionalContext")
-
-        cursor = CursorAgentIntegration()
-        assert _context_envelope_for(cursor, "session_start") == "additional_context"
-        assert _context_envelope_for(cursor, "user_prompt_submit") == "suppress"
-        cmd_cursor_start = _dispatcher_command(cursor, Path("/proj"), "speckit.boot", "session_start")
-        assert cmd_cursor_start.endswith(" 60 additional_context")
-
-        claude = ClaudeIntegration()
-        codex = CodexIntegration()
-        assert _context_envelope_for(claude, "session_start") is None
-        assert _context_envelope_for(codex, "session_start") is None
-
-
 class TestDispatcherCommandQuoting:
    """R2: dispatcher command components are shell-quoted so spaces and shell
    metacharacters are passed as single arguments, not reinterpreted."""
@@ -868,59 +751,6 @@ class TestTomlMatcherEscaping:
        assert group["matcher"] == 'Ba"sh'


-class TestTomlUnreadableConfig:
-    """An undecodable user config.toml must not crash install or teardown.
-
-    Every JSON merge/remove path goes through ``_load_user_json``, which
-    skips on an unreadable or malformed file to preserve user content (#22).
-    The TOML merge and remove read the user's config.toml with no boundary,
-    so a non-UTF-8 (or otherwise unreadable) file crashed
-    ``install_integration_events``/``remove_integration_events`` with a raw
-    ``UnicodeDecodeError`` — and the merge path would have regenerated the
-    file, discarding the user's bytes, had it not crashed first.
-    """
-
-    def test_merge_skips_unreadable_config_and_preserves_bytes(self, tmp_path):
-        from specify_cli.integrations.codex import CodexIntegration
-
-        integration = CodexIntegration()
-        manifest = _claude_manifest(tmp_path)
-        config_path = tmp_path / ".codex" / "config.toml"
-        config_path.parent.mkdir(parents=True)
-        user_bytes = b"# codex config \xff\xfe not utf-8\n"
-        config_path.write_bytes(user_bytes)
-
-        install_integration_events(
-            integration, tmp_path, manifest,
-            {"pre_tool_use": [{"command": "speckit.tdd.validate"}]},
-        )
-
-        # User bytes preserved and the skipped file is not tracked (S5).
-        assert config_path.read_bytes() == user_bytes
-        manifest.record_existing.assert_not_called()
-
-    def test_teardown_skips_unreadable_config_and_preserves_bytes(self, tmp_path):
-        from specify_cli.integrations.codex import CodexIntegration
-
-        integration = CodexIntegration()
-        manifest = _claude_manifest(tmp_path)
-        install_integration_events(
-            integration, tmp_path, manifest,
-            {"pre_tool_use": [{"command": "speckit.tdd.validate"}]},
-        )
-        config_path = tmp_path / ".codex" / "config.toml"
-        assert config_path.is_file()
-
-        # The user (or another tool) rewrites the config as non-UTF-8
-        # between install and uninstall.
-        user_bytes = b"# rewritten \xff\xfe not utf-8\n"
-        config_path.write_bytes(user_bytes)
-
-        remove_integration_events(integration, tmp_path, manifest)
-
-        assert config_path.read_bytes() == user_bytes
-
-
 # -- Opencode TS Plugin merging ---------------------------------------------

 class TestOpencodePluginMerging:
@@ -936,7 +766,6 @@ class TestOpencodePluginMerging:
        events = {
            "pre_tool_use": [{"command": "speckit.tdd.validate", "matcher": "Edit"}],
            "session_start": [{"command": "speckit.agent-context.update"}],
-            "session_end": [{"command": "speckit.agent-context.teardown"}],
        }
        install_integration_events(integration, tmp_path, manifest, events)

@@ -945,50 +774,13 @@ class TestOpencodePluginMerging:
        content = plugin_path.read_text()
        assert "runEvent" in content
        assert "tool.execute.before" in content
-        assert "experimental.chat.system.transform" in content
+        assert "session.created" in content
        assert "speckit.tdd.validate" in content
        assert "speckit.agent-context.update" in content
        # #13: failures must propagate via throw, not process.exit(2) which
        # would kill the OpenCode host process.
        assert "process.exit(2)" not in content
        assert "throw new Error" in content
-        # session_start (experimental.chat.system.transform) must be guarded
-        # so canonical session-start handlers only run when a session is
-        # present — OpenCode fires this hook for non-session operations
-        # (e.g. agent generation) with no sessionID.
-        assert "if (!input.sessionID) return;" in content
-        # session_start handler output is cached per sessionID so non-idempotent
-        # handlers run once per session instead of on every LLM request.
-        assert "sessionStartCache" in content
-        assert "sessionStartCache.get(input.sessionID)" in content
-        assert "sessionStartCache.set(input.sessionID" in content
-        # Cache is evicted on session.deleted (session_end).
-        assert "sessionStartCache.delete(event.sessionID)" in content
-
-    def test_opencode_ts_plugin_chat_message_part_injection(self, tmp_path):
-        """user_prompt_submit emits chat.message pushing a synthetic TextPart.
-        The part ID derives from output.parts[last].id (prt_ brand preserved)
-        with a prt_ fallback to prevent OpenCode session schema crashes."""
-        integration = OpencodeIntegration()
-        manifest = MagicMock(spec=IntegrationManifest)
-        manifest.files = {}
-        manifest.record_file = MagicMock()
-        manifest.record_existing = MagicMock()
-
-        events = {
-            "user_prompt_submit": [{"command": "speckit.discover"}],
-        }
-        install_integration_events(integration, tmp_path, manifest, events)
-
-        plugin_path = tmp_path / ".opencode/plugin/speckit-events.ts"
-        assert plugin_path.is_file()
-        content = plugin_path.read_text()
-        assert "chat.message" in content
-        assert "output.parts.push" in content
-        assert "synthetic: true" in content
-        assert 'type: "text"' in content
-        assert "output.parts[output.parts.length - 1]?.id" in content
-        assert '?? "prt_"' in content

    def test_opencode_ts_plugin_resolves_interpreter_and_directory_at_load(self, tmp_path):
        """C8/C9: the dispatcher + interpreter are resolved per-project at
@@ -1239,32 +1031,6 @@ class TestCommandRunner:
        assert PurePath(argv[1]).as_posix().endswith(".specify/scripts/python/boot.py")
        assert ".specify" in argv[1]

-    def test_unparseable_script_command_returns_none(self, tmp_path):
-        """A ``scripts:`` value shlex cannot tokenize must resolve to no argv.
-
-        The generated dispatcher's ``_resolve_argv`` twin wraps its
-        ``shlex.split`` in ``except ValueError: return None``, but the
-        CLI-side resolver did not: an unclosed quote in a ``scripts:``
-        frontmatter value raised a raw ``ValueError: No closing quotation``
-        through ``resolve_and_run_event_command`` instead of degrading to
-        "no runnable script" like every other malformed-input case here.
-        """
-        from specify_cli.events import _resolve_event_command_argv
-
-        cmd_dir = tmp_path / ".specify" / "templates" / "commands"
-        cmd_dir.mkdir(parents=True)
-        (cmd_dir / "boot.md").write_text(
-            "---\n"
-            "description: \"Boot\"\n"
-            "scripts:\n"
-            "  sh: scripts/bash/boot.sh \"unclosed\n"
-            "---\nBody\n",
-            encoding="utf-8",
-        )
-
-        argv = _resolve_event_command_argv(cmd_dir / "boot.md", tmp_path, None)
-        assert argv is None
-
    def test_ps_variant_prefixed_with_powershell_launcher(self, tmp_path):
        """S6: the ps variant prefixes argv with pwsh/powershell -File so
        subprocess.run(shell=False) can execute the .ps1 script."""
@@ -1343,7 +1109,7 @@ class TestCommandRunner:
        content = (tmp_path / EVENTS_DISPATCHER_REL).read_text()
        # Delegates to specify_cli when importable.
        assert "from specify_cli.events import resolve_and_run_event_command" in content
-        assert "except (ImportError, TypeError):" in content
+        assert "except ImportError" in content
        # Inline stdlib fallback resolver for one-time/temporary installs.
        assert "_run_inline" in content
        assert "_find_command_template" in content
@@ -426,7 +426,7 @@ class _RunCapture:
        return _Result()


-def test_copilot_commands_dispatch_includes_extra_args(monkeypatch):
+def test_copilot_dispatch_command_includes_extra_args(monkeypatch):
    """Locks the bypass fix: `CopilotIntegration.dispatch_command`
    must honour `SPECKIT_INTEGRATION_COPILOT_EXTRA_ARGS`, not just `build_exec_args`.
    """
@@ -441,9 +441,9 @@ def test_copilot_commands_dispatch_includes_extra_args(monkeypatch):
        "SPECKIT_INTEGRATION_COPILOT_EXTRA_ARGS", "--allow-tool 'shell(echo)'"
    )

-    integration = CopilotIntegration()
-    integration._skills_mode = False
-    integration.dispatch_command("speckit.plan", args="body", stream=False)
+    CopilotIntegration().dispatch_command(
+        "speckit.plan", args="body", stream=False
+    )

    assert capture.captured_args is not None
    # Hook inserted between `-p prompt` and the canonical Copilot flags.
@@ -2,16 +2,16 @@

 import json
 import os
+import warnings

 import pytest
-import typer
 import yaml

 from specify_cli.integrations import get_integration
 from specify_cli.integrations.manifest import IntegrationManifest


-class TestCopilotCommandsMode:
+class TestCopilotIntegration:
    def test_copilot_key_and_config(self):
        copilot = get_integration("copilot")
        assert copilot is not None
@@ -28,7 +28,7 @@ class TestCopilotCommandsMode:
        from specify_cli.integrations.copilot import CopilotIntegration
        copilot = CopilotIntegration()
        m = IntegrationManifest("copilot", tmp_path)
-        created = copilot.setup(tmp_path, m, parsed_options={"commands": True})
+        created = copilot.setup(tmp_path, m)
        assert len(created) > 0
        agent_files = [f for f in created if ".agent." in f.name]
        assert len(agent_files) > 0
@@ -36,11 +36,36 @@ class TestCopilotCommandsMode:
            assert f.parent == tmp_path / ".github" / "agents"
            assert f.name.endswith(".agent.md")

+    def test_setup_warns_legacy_markdown_default_is_deprecated(self, tmp_path):
+        from specify_cli.integrations.copilot import CopilotIntegration
+        copilot = CopilotIntegration()
+        m = IntegrationManifest("copilot", tmp_path)
+
+        with pytest.warns(UserWarning, match="Copilot legacy markdown mode is deprecated"):
+            created = copilot.setup(tmp_path, m)
+
+        assert any(f.name.endswith(".agent.md") for f in created)
+
+    def test_skills_setup_does_not_warn_about_legacy_default(self, tmp_path):
+        from specify_cli.integrations.copilot import CopilotIntegration
+        copilot = CopilotIntegration()
+        m = IntegrationManifest("copilot", tmp_path)
+
+        with warnings.catch_warnings(record=True) as caught:
+            warnings.simplefilter("always")
+            created = copilot.setup(tmp_path, m, parsed_options={"skills": True})
+
+        assert not any(
+            "Copilot legacy markdown mode is deprecated" in str(item.message)
+            for item in caught
+        )
+        assert any(f.name == "SKILL.md" for f in created)
+
    def test_setup_creates_companion_prompts(self, tmp_path):
        from specify_cli.integrations.copilot import CopilotIntegration
        copilot = CopilotIntegration()
        m = IntegrationManifest("copilot", tmp_path)
-        created = copilot.setup(tmp_path, m, parsed_options={"commands": True})
+        created = copilot.setup(tmp_path, m)
        prompt_files = [f for f in created if f.parent.name == "prompts"]
        assert len(prompt_files) > 0
        for f in prompt_files:
@@ -52,7 +77,7 @@ class TestCopilotCommandsMode:
        from specify_cli.integrations.copilot import CopilotIntegration
        copilot = CopilotIntegration()
        m = IntegrationManifest("copilot", tmp_path)
-        created = copilot.setup(tmp_path, m, parsed_options={"commands": True})
+        created = copilot.setup(tmp_path, m)
        agents = [f for f in created if ".agent.md" in f.name]
        prompts = [f for f in created if ".prompt.md" in f.name]
        assert len(agents) == len(prompts)
@@ -62,7 +87,7 @@ class TestCopilotCommandsMode:
        copilot = CopilotIntegration()
        assert copilot._vscode_settings_path() is not None
        m = IntegrationManifest("copilot", tmp_path)
-        created = copilot.setup(tmp_path, m, parsed_options={"commands": True})
+        created = copilot.setup(tmp_path, m)
        settings = tmp_path / ".vscode" / "settings.json"
        assert settings.exists()
        assert settings in created
@@ -76,7 +101,7 @@ class TestCopilotCommandsMode:
        existing = {"editor.fontSize": 14, "custom.setting": True}
        (vscode_dir / "settings.json").write_text(json.dumps(existing, indent=4), encoding="utf-8")
        m = IntegrationManifest("copilot", tmp_path)
-        created = copilot.setup(tmp_path, m, parsed_options={"commands": True})
+        created = copilot.setup(tmp_path, m)
        settings = tmp_path / ".vscode" / "settings.json"
        data = json.loads(settings.read_text(encoding="utf-8"))
        assert data["editor.fontSize"] == 14
@@ -94,7 +119,7 @@ class TestCopilotCommandsMode:
        settings.write_bytes(original)
        m = IntegrationManifest("copilot", tmp_path)

-        copilot.setup(tmp_path, m, parsed_options={"commands": True})
+        copilot.setup(tmp_path, m)

        assert settings.read_bytes() == original
        assert "Could not parse" in caplog.text
@@ -103,7 +128,7 @@ class TestCopilotCommandsMode:
        from specify_cli.integrations.copilot import CopilotIntegration
        copilot = CopilotIntegration()
        m = IntegrationManifest("copilot", tmp_path)
-        created = copilot.setup(tmp_path, m, parsed_options={"commands": True})
+        created = copilot.setup(tmp_path, m)
        for f in created:
            rel = f.resolve().relative_to(tmp_path.resolve()).as_posix()
            assert rel in m.files, f"Created file {rel} not tracked in manifest"
@@ -112,9 +137,7 @@ class TestCopilotCommandsMode:
        from specify_cli.integrations.copilot import CopilotIntegration
        copilot = CopilotIntegration()
        m = IntegrationManifest("copilot", tmp_path)
-        created = copilot.install(
-            tmp_path, m, parsed_options={"commands": True}
-        )
+        created = copilot.install(tmp_path, m)
        assert len(created) > 0
        m.save()
        for f in created:
@@ -127,9 +150,7 @@ class TestCopilotCommandsMode:
        from specify_cli.integrations.copilot import CopilotIntegration
        copilot = CopilotIntegration()
        m = IntegrationManifest("copilot", tmp_path)
-        created = copilot.install(
-            tmp_path, m, parsed_options={"commands": True}
-        )
+        created = copilot.install(tmp_path, m)
        m.save()
        modified_file = created[0]
        modified_file.write_text("user modified this", encoding="utf-8")
@@ -141,7 +162,7 @@ class TestCopilotCommandsMode:
        from specify_cli.integrations.copilot import CopilotIntegration
        copilot = CopilotIntegration()
        m = IntegrationManifest("copilot", tmp_path)
-        copilot.setup(tmp_path, m, parsed_options={"commands": True})
+        copilot.setup(tmp_path, m)
        agents_dir = tmp_path / ".github" / "agents"
        assert agents_dir.is_dir()
        agent_files = sorted(agents_dir.glob("speckit.*.agent.md"))
@@ -157,7 +178,7 @@ class TestCopilotCommandsMode:
        from specify_cli.integrations.copilot import CopilotIntegration
        copilot = CopilotIntegration()
        m = IntegrationManifest("copilot", tmp_path)
-        copilot.setup(tmp_path, m, parsed_options={"commands": True})
+        copilot.setup(tmp_path, m)
        agents_dir = tmp_path / ".github" / "agents"
        for agent_file in agents_dir.glob("speckit.*.agent.md"):
            content = agent_file.read_text(encoding="utf-8")
@@ -172,7 +193,7 @@ class TestCopilotCommandsMode:
        from specify_cli.integrations.copilot import CopilotIntegration
        copilot = CopilotIntegration()
        m = IntegrationManifest("copilot", tmp_path)
-        copilot.setup(tmp_path, m, parsed_options={"commands": True})
+        copilot.setup(tmp_path, m)

        specify_file = tmp_path / ".github" / "agents" / "speckit.specify.agent.md"
        content = specify_file.read_text(encoding="utf-8")
@@ -188,7 +209,7 @@ class TestCopilotCommandsMode:
        copilot = CopilotIntegration()
        m = IntegrationManifest("copilot", tmp_path)

-        copilot.setup(tmp_path, m, parsed_options={"commands": True})
+        copilot.setup(tmp_path, m)

        specify_file = tmp_path / ".github" / "agents" / "speckit.specify.agent.md"
        content = specify_file.read_text(encoding="utf-8")
@@ -212,7 +233,7 @@ class TestCopilotCommandsMode:
            encoding="utf-8",
        )

-        copilot.setup(tmp_path, m, parsed_options={"commands": True})
+        copilot.setup(tmp_path, m)

        specify_file = tmp_path / ".github" / "agents" / "speckit.specify.agent.md"
        content = specify_file.read_text(encoding="utf-8")
@@ -225,14 +246,14 @@ class TestCopilotCommandsMode:
        from specify_cli.integrations.copilot import CopilotIntegration
        copilot = CopilotIntegration()
        m = IntegrationManifest("copilot", tmp_path)
-        copilot.setup(tmp_path, m, parsed_options={"commands": True})
+        copilot.setup(tmp_path, m)
        plan_file = tmp_path / ".github" / "agents" / "speckit.plan.agent.md"
        assert plan_file.exists()
        content = plan_file.read_text(encoding="utf-8")
        assert "__CONTEXT_FILE__" not in content

    def test_complete_file_inventory_sh(self, tmp_path):
-        """Every file produced by Copilot commands mode with shell scripts."""
+        """Every file produced by specify init --integration copilot --script sh."""
        from typer.testing import CliRunner
        from specify_cli import app
        project = tmp_path / "inventory-sh"
@@ -241,8 +262,7 @@ class TestCopilotCommandsMode:
        try:
            os.chdir(project)
            result = CliRunner().invoke(app, [
-                "init", "--here", "--integration", "copilot",
-                "--integration-options", "--commands", "--script", "sh",
+                "init", "--here", "--integration", "copilot", "--script", "sh",
            ], catch_exceptions=False)
        finally:
            os.chdir(old_cwd)
@@ -295,7 +315,7 @@ class TestCopilotCommandsMode:
        )

    def test_complete_file_inventory_ps(self, tmp_path):
-        """Every file produced by Copilot commands mode with PowerShell scripts."""
+        """Every file produced by specify init --integration copilot --script ps."""
        from typer.testing import CliRunner
        from specify_cli import app
        project = tmp_path / "inventory-ps"
@@ -304,8 +324,7 @@ class TestCopilotCommandsMode:
        try:
            os.chdir(project)
            result = CliRunner().invoke(app, [
-                "init", "--here", "--integration", "copilot",
-                "--integration-options", "--commands", "--script", "ps",
+                "init", "--here", "--integration", "copilot", "--script", "ps",
            ], catch_exceptions=False)
        finally:
            os.chdir(old_cwd)
@@ -357,8 +376,54 @@ class TestCopilotCommandsMode:
            f"Extra: {sorted(set(actual) - set(expected))}"
        )

+    def test_default_cli_init_warns_legacy_markdown_is_deprecated(self, tmp_path):
+        """Default Copilot init should warn users about the future skills default."""
+        from typer.testing import CliRunner
+        from specify_cli import app
+        project = tmp_path / "default-warning"
+        project.mkdir()
+        old_cwd = os.getcwd()
+        try:
+            os.chdir(project)
+            with pytest.warns(
+                UserWarning,
+                match="Copilot legacy markdown mode is deprecated",
+            ):
+                result = CliRunner().invoke(app, [
+                    "init", "--here", "--integration", "copilot", "--script", "sh",
+                ], catch_exceptions=False)
+        finally:
+            os.chdir(old_cwd)
+
+        assert result.exit_code == 0, result.output
+
+    def test_skills_cli_init_does_not_warn_about_legacy_markdown(self, tmp_path):
+        """Explicit Copilot skills mode should not warn about the legacy default."""
+        from typer.testing import CliRunner
+        from specify_cli import app
+        project = tmp_path / "skills-no-warning"
+        project.mkdir()
+        old_cwd = os.getcwd()
+        try:
+            os.chdir(project)
+            with warnings.catch_warnings(record=True) as caught:
+                warnings.simplefilter("always")
+                result = CliRunner().invoke(app, [
+                    "init", "--here", "--integration", "copilot",
+                    "--integration-options", "--skills", "--script", "sh",
+                ], catch_exceptions=False)
+        finally:
+            os.chdir(old_cwd)
+
+        assert result.exit_code == 0, result.output
+        assert not any(
+            "Copilot legacy markdown mode is deprecated" in str(item.message)
+            for item in caught
+        )
+
+
 class TestCopilotSkillsMode:
-    """Tests for Copilot's default skills mode."""
+    """Tests for Copilot integration in --skills mode."""

    _SKILL_COMMANDS = [
        "analyze", "clarify", "constitution", "converge", "implement",
@@ -371,7 +436,7 @@ class TestCopilotSkillsMode:

    def _setup_skills(self, copilot, tmp_path):
        m = IntegrationManifest("copilot", tmp_path)
-        created = copilot.setup(tmp_path, m)
+        created = copilot.setup(tmp_path, m, parsed_options={"skills": True})
        return created, m

    # -- Options ----------------------------------------------------------
@@ -384,137 +449,6 @@ class TestCopilotSkillsMode:
        assert skills_opts[0].is_flag is True
        assert skills_opts[0].default is False

-    def test_options_include_commands_flag(self):
-        copilot = get_integration("copilot")
-        commands_opts = [o for o in copilot.options() if o.name == "--commands"]
-        assert len(commands_opts) == 1
-        assert commands_opts[0].is_flag is True
-        assert commands_opts[0].default is False
-
-    def test_default_is_skills_mode(self):
-        copilot = self._make_copilot()
-        assert copilot.is_skills_mode() is True
-        assert copilot.is_skills_mode({}) is True
-
-    def test_commands_flag_disables_skills_mode(self):
-        copilot = self._make_copilot()
-        assert copilot.is_skills_mode({"commands": True}) is False
-
-    def test_existing_commands_layout_is_preserved(self, tmp_path):
-        copilot = self._make_copilot()
-        agents_dir = tmp_path / ".github" / "agents"
-        agents_dir.mkdir(parents=True)
-        (agents_dir / "speckit.plan.agent.md").write_text(
-            "# plan\n", encoding="utf-8"
-        )
-        assert copilot.is_skills_mode(project_root=tmp_path) is False
-
-    def test_setup_preserves_existing_commands_without_stored_options(
-        self, tmp_path
-    ):
-        copilot = self._make_copilot()
-        agents_dir = tmp_path / ".github" / "agents"
-        agents_dir.mkdir(parents=True)
-        (agents_dir / "speckit.plan.agent.md").write_text(
-            "# old plan\n", encoding="utf-8"
-        )
-        manifest = IntegrationManifest("copilot", tmp_path)
-
-        created = copilot.setup(tmp_path, manifest)
-
-        assert any(path.name.endswith(".agent.md") for path in created)
-        assert not (tmp_path / ".github" / "skills").exists()
-        assert copilot._skills_mode is False
-
-    def test_existing_skills_layout_stays_in_skills_mode(self, tmp_path):
-        copilot = self._make_copilot()
-        (tmp_path / ".github" / "skills" / "speckit-plan").mkdir(parents=True)
-        assert copilot.is_skills_mode(project_root=tmp_path) is True
-
-    def test_commands_manifest_wins_over_untracked_skill(self, tmp_path):
-        copilot = self._make_copilot()
-        manifest = IntegrationManifest("copilot", tmp_path)
-        copilot.setup(
-            tmp_path, manifest, parsed_options={"commands": True}
-        )
-        manifest.save()
-        stale_skill = (
-            tmp_path
-            / ".github"
-            / "skills"
-            / "speckit-plan"
-            / "SKILL.md"
-        )
-        stale_skill.parent.mkdir(parents=True)
-        stale_skill.write_text("# user-authored skill\n", encoding="utf-8")
-
-        assert copilot.is_skills_mode(project_root=tmp_path) is False
-
-    def test_skills_manifest_wins_over_untracked_command(self, tmp_path):
-        copilot = self._make_copilot()
-        manifest = IntegrationManifest("copilot", tmp_path)
-        copilot.setup(tmp_path, manifest)
-        manifest.save()
-        stale_agent = (
-            tmp_path
-            / ".github"
-            / "agents"
-            / "speckit.plan.agent.md"
-        )
-        stale_agent.parent.mkdir(parents=True)
-        stale_agent.write_text("# stale command\n", encoding="utf-8")
-
-        assert copilot.is_skills_mode(project_root=tmp_path) is True
-
-    def test_explicit_skills_forces_migration_from_commands(self, tmp_path):
-        copilot = self._make_copilot()
-        agents_dir = tmp_path / ".github" / "agents"
-        agents_dir.mkdir(parents=True)
-        (agents_dir / "speckit.plan.agent.md").write_text(
-            "# plan\n", encoding="utf-8"
-        )
-        assert (
-            copilot.is_skills_mode({"skills": True}, project_root=tmp_path)
-            is True
-        )
-
-    def test_skills_and_commands_flags_are_mutually_exclusive(self):
-        copilot = self._make_copilot()
-        with pytest.raises(typer.Exit):
-            copilot.is_skills_mode({"skills": True, "commands": True})
-
-    def test_cli_rejects_skills_and_commands_together(self, tmp_path):
-        from typer.testing import CliRunner
-
-        from specify_cli import app
-
-        project = tmp_path / "conflicting-modes"
-        project.mkdir()
-        old_cwd = os.getcwd()
-        try:
-            os.chdir(project)
-            result = CliRunner().invoke(
-                app,
-                [
-                    "init",
-                    "--here",
-                    "--integration",
-                    "copilot",
-                    "--integration-options",
-                    "--skills --commands",
-                    "--script",
-                    "sh",
-                ],
-                catch_exceptions=False,
-            )
-        finally:
-            os.chdir(old_cwd)
-
-        assert result.exit_code == 1
-        assert "--skills and --commands are mutually exclusive" in result.output
-        assert not (project / ".github" / "skills").exists()
-        assert not (project / ".github" / "agents").exists()
-
    # -- Skills directory structure ---------------------------------------

    def test_skills_creates_skill_files(self, tmp_path):
@@ -689,16 +623,16 @@ class TestCopilotSkillsMode:
    def test_skills_mode_invoke_separator(self):
        """Copilot effective_invoke_separator should reflect skills mode."""
        copilot = self._make_copilot()
-        assert copilot.effective_invoke_separator() == "-"
+        assert copilot.effective_invoke_separator() == "."
        assert copilot.effective_invoke_separator({"skills": True}) == "-"
-        assert copilot.effective_invoke_separator({"commands": True}) == "."
+        assert copilot.effective_invoke_separator({"skills": False}) == "."

    def test_invoke_separator_for_mode_tracks_persisted_state(self):
        """Regression (review #3415): registration paths (preset/extension
        command refs) must resolve the separator from the persisted ai_skills
        state. A Copilot skills project renders ``/speckit-<cmd>`` (hyphen),
-        matching ``build_command_invocation``; commands mode renders
-        ``/speckit.<cmd>`` (dot).
+        matching ``build_command_invocation``; the default markdown layout
+        renders ``/speckit.<cmd>`` (dot).
        """
        copilot = self._make_copilot()
        assert copilot.invoke_separator_for_mode(True) == "-"
@@ -739,7 +673,7 @@ class TestCopilotSkillsMode:
    def test_install_uninstall_roundtrip(self, tmp_path):
        copilot = self._make_copilot()
        m = IntegrationManifest("copilot", tmp_path)
-        created = copilot.install(tmp_path, m)
+        created = copilot.install(tmp_path, m, parsed_options={"skills": True})
        assert len(created) > 0
        m.save()
        for f in created:
@@ -751,7 +685,7 @@ class TestCopilotSkillsMode:
    def test_modified_file_survives_uninstall(self, tmp_path):
        copilot = self._make_copilot()
        m = IntegrationManifest("copilot", tmp_path)
-        created = copilot.install(tmp_path, m)
+        created = copilot.install(tmp_path, m, parsed_options={"skills": True})
        m.save()
        modified_file = created[0]
        modified_file.write_text("user modified this", encoding="utf-8")
@@ -776,12 +710,6 @@ class TestCopilotSkillsMode:

    def test_build_command_invocation_default_mode(self):
        copilot = self._make_copilot()
-        assert copilot.build_command_invocation("plan", "my args") == "/speckit-plan my args"
-        assert copilot.build_command_invocation("plan") == "/speckit-plan"
-
-    def test_build_command_invocation_commands_mode(self):
-        copilot = self._make_copilot()
-        copilot._skills_mode = False
        assert copilot.build_command_invocation("plan", "my args") == "my args"
        assert copilot.build_command_invocation("plan") == ""

@@ -797,8 +725,8 @@ class TestCopilotSkillsMode:

    # -- CLI integration test ---------------------------------------------

-    def test_init_defaults_to_skills(self, tmp_path):
-        """specify init --integration copilot scaffolds skills by default."""
+    def test_init_with_integration_options_skills(self, tmp_path):
+        """specify init --integration copilot --integration-options='--skills' scaffolds skills."""
        from typer.testing import CliRunner
        from specify_cli import app
        project = tmp_path / "copilot-skills"
@@ -808,6 +736,7 @@ class TestCopilotSkillsMode:
            os.chdir(project)
            result = CliRunner().invoke(app, [
                "init", "--here", "--integration", "copilot",
+                "--integration-options", "--skills",
                "--script", "sh",
            ], catch_exceptions=False)
        finally:
@@ -823,7 +752,7 @@ class TestCopilotSkillsMode:
        assert not (project / ".vscode" / "settings.json").exists()

    def test_complete_file_inventory_skills_sh(self, tmp_path):
-        """Every file produced by default Copilot init with shell scripts."""
+        """Every file produced by specify init --integration copilot --integration-options='--skills' --script sh."""
        from typer.testing import CliRunner
        from specify_cli import app
        project = tmp_path / "inventory-skills-sh"
@@ -833,6 +762,7 @@ class TestCopilotSkillsMode:
            os.chdir(project)
            result = CliRunner().invoke(app, [
                "init", "--here", "--integration", "copilot",
+                "--integration-options", "--skills",
                "--script", "sh",
            ], catch_exceptions=False)
        finally:
@@ -872,46 +802,36 @@ class TestCopilotSkillsMode:

    # -- Singleton leak: _skills_mode must reset --------------------------

-    def test_skills_mode_resets_between_layouts(self, tmp_path):
-        """setup() must reset the singleton mode for each selected layout."""
+    def test_skills_mode_resets_on_default_setup(self, tmp_path):
+        """setup() with skills=True then without must reset _skills_mode."""
        copilot = self._make_copilot()

-        # First call: default skills mode
+        # First call: skills mode
        (tmp_path / "proj1").mkdir()
        m1 = IntegrationManifest("copilot", tmp_path / "proj1")
-        copilot.setup(tmp_path / "proj1", m1)
+        copilot.setup(tmp_path / "proj1", m1, parsed_options={"skills": True})
        assert copilot._skills_mode is True

-        # Second call: explicit commands mode
+        # Second call: default mode (no skills option)
        (tmp_path / "proj2").mkdir()
        m2 = IntegrationManifest("copilot", tmp_path / "proj2")
-        copilot.setup(
-            tmp_path / "proj2", m2, parsed_options={"commands": True}
-        )
+        copilot.setup(tmp_path / "proj2", m2)
        assert copilot._skills_mode is False
+
+        # build_command_invocation must use default (dotted) mode
        assert copilot.build_command_invocation("plan", "args") == "args"

-        # Third call: a fresh default project must switch back to skills.
-        (tmp_path / "proj3").mkdir()
-        m3 = IntegrationManifest("copilot", tmp_path / "proj3")
-        copilot.setup(tmp_path / "proj3", m3)
-        assert copilot._skills_mode is True
-        assert copilot.build_command_invocation("plan") == "/speckit-plan"
+    # -- Auto-detection must ignore unrelated .github/skills/ -------------

-    # -- Auto-detection must preserve managed commands --------------------
-
-    def test_dispatch_preserves_commands_with_unrelated_skills(self, tmp_path):
-        """Unrelated skills must not migrate a managed commands layout."""
+    def test_dispatch_ignores_unrelated_skills_directory(self, tmp_path):
+        """dispatch_command() must not treat unrelated .github/skills/ as skills mode."""
        copilot = self._make_copilot()
-        agents_dir = tmp_path / ".github" / "agents"
-        agents_dir.mkdir(parents=True)
-        (agents_dir / "speckit.plan.agent.md").write_text(
-            "# plan\n", encoding="utf-8"
-        )
+        # Create a .github/skills/ with non-speckit content (e.g. GitHub Skills training)
        unrelated = tmp_path / ".github" / "skills" / "introduction-to-github"
        unrelated.mkdir(parents=True)
        (unrelated / "README.md").write_text("# GitHub Skills training\n")

+        # Should NOT detect skills mode — cli_args should contain --agent
        import unittest.mock as mock
        with mock.patch("subprocess.run") as mock_run:
            mock_run.return_value = mock.Mock(returncode=0, stdout="", stderr="")
@@ -948,7 +868,7 @@ class TestCopilotSkillsMode:
    # -- Next-steps display for Copilot skills mode -----------------------

    def test_init_skills_next_steps_show_skill_syntax(self, tmp_path):
-        """Default Copilot init shows /speckit-plan, not /speckit.plan."""
+        """specify init --integration copilot --integration-options='--skills' shows /speckit-plan not /speckit.plan."""
        from typer.testing import CliRunner
        from specify_cli import app
        project = tmp_path / "copilot-nextsteps"
@@ -958,6 +878,7 @@ class TestCopilotSkillsMode:
            os.chdir(project)
            result = CliRunner().invoke(app, [
                "init", "--here", "--integration", "copilot",
+                "--integration-options", "--skills",
            ], catch_exceptions=False)
        finally:
            os.chdir(old_cwd)
@@ -89,10 +89,10 @@ def test_write_integration_json_strips_integration_key(tmp_path):
 def test_with_integration_setting_recomputes_separator_from_retained_options():
    """Updating only script_type must not drop an options-dependent separator.

-    Copilot resolves the command-ref separator to '.' when '--commands' is
-    stored and '-' by default. A second call that changes only script_type
+    Copilot resolves the command-ref separator to '-' when '--skills' options
+    are stored and '.' otherwise. A second call that changes only script_type
    (parsed_options=None, raw_options=None) retains the stored parsed_options,
-    so invoke_separator must stay '.', not be recomputed from the None argument.
+    so invoke_separator must stay '-', not be recomputed from the None argument.
    """
    from specify_cli.integrations import get_integration
    from specify_cli.integration_runtime import with_integration_setting
@@ -100,15 +100,15 @@ def test_with_integration_setting_recomputes_separator_from_retained_options():
    copilot = get_integration("copilot")

    settings = with_integration_setting(
-        {}, "copilot", copilot, parsed_options={"commands": True}
+        {}, "copilot", copilot, parsed_options={"skills": True}
    )
-    assert settings["copilot"]["invoke_separator"] == "."
+    assert settings["copilot"]["invoke_separator"] == "-"

    settings2 = with_integration_setting(
        {"integration_settings": settings}, "copilot", copilot, script_type="ps"
    )
    # parsed_options are retained (only script_type changed) ...
-    assert settings2["copilot"]["parsed_options"] == {"commands": True}
+    assert settings2["copilot"]["parsed_options"] == {"skills": True}
    assert settings2["copilot"]["script"] == "ps"
    # ... so the separator must reflect them, not the (None) argument.
-    assert settings2["copilot"]["invoke_separator"] == "."
+    assert settings2["copilot"]["invoke_separator"] == "-"
@@ -2224,99 +2224,15 @@ class TestIntegrationSwitch:
        # Old claude files removed
        assert not (project / ".claude" / "skills" / "speckit-plan" / "SKILL.md").exists()

-        # New default Copilot skills created
-        assert (
-            project / ".github" / "skills" / "speckit-plan" / "SKILL.md"
-        ).exists()
-        assert "/speckit-specify" in shared_script.read_text(encoding="utf-8")
-        assert "/speckit.specify" not in shared_script.read_text(encoding="utf-8")
+        # New copilot files created
+        assert (project / ".github" / "agents" / "speckit.plan.agent.md").exists()
+        assert "/speckit.specify" in shared_script.read_text(encoding="utf-8")
+        assert "/speckit-specify" not in shared_script.read_text(encoding="utf-8")

        # integration.json updated
        data = json.loads((project / ".specify" / "integration.json").read_text(encoding="utf-8"))
        assert data["integration"] == "copilot"

-    def test_switch_rejects_conflicting_copilot_modes_before_uninstall(
-        self, tmp_path
-    ):
-        project = _init_project(tmp_path, "claude")
-        claude_skill = (
-            project / ".claude" / "skills" / "speckit-plan" / "SKILL.md"
-        )
-        before_state = json.loads(
-            (project / ".specify" / "integration.json").read_text(
-                encoding="utf-8"
-            )
-        )
-
-        result = _run_in_project(
-            project,
-            [
-                "integration",
-                "switch",
-                "copilot",
-                "--integration-options",
-                "--skills --commands",
-                "--script",
-                "sh",
-            ],
-        )
-
-        assert result.exit_code == 1
-        assert "--skills and --commands are mutually exclusive" in result.output
-        assert claude_skill.exists()
-        assert not (project / ".github" / "skills").exists()
-        assert not (project / ".github" / "agents").exists()
-        after_state = json.loads(
-            (project / ".specify" / "integration.json").read_text(
-                encoding="utf-8"
-            )
-        )
-        assert after_state == before_state
-
-    def test_switch_preserves_target_options_with_fallback_integration(
-        self, tmp_path
-    ):
-        project = _init_project(tmp_path, "claude")
-        install = _run_in_project(
-            project,
-            [
-                "integration",
-                "install",
-                "opencode",
-                "--script",
-                "sh",
-                "--force",
-            ],
-        )
-        assert install.exit_code == 0, install.output
-
-        result = _run_in_project(
-            project,
-            [
-                "integration",
-                "switch",
-                "copilot",
-                "--integration-options",
-                "--commands",
-                "--script",
-                "sh",
-            ],
-        )
-
-        assert result.exit_code == 0, result.output
-        assert (
-            project / ".github" / "agents" / "speckit.plan.agent.md"
-        ).exists()
-        assert not (project / ".github" / "skills").exists()
-        state = json.loads(
-            (project / ".specify" / "integration.json").read_text(
-                encoding="utf-8"
-            )
-        )
-        assert state["integration_settings"]["copilot"]["parsed_options"] == {
-            "commands": True
-        }
-
    def test_switch_migrates_extension_commands(self, tmp_path):
        """Switching should migrate extension commands to the new agent directory."""
        project = _init_project(tmp_path, "kimi")
@@ -2576,7 +2492,6 @@ class TestIntegrationSwitch:
            os.chdir(project)
            result = runner.invoke(app, [
                "integration", "switch", "copilot",
-                "--integration-options", "--commands",
                "--script", "sh",
            ], catch_exceptions=False)
        finally:
@@ -2615,7 +2530,6 @@ class TestIntegrationSwitch:
            os.chdir(project)
            result = runner.invoke(app, [
                "integration", "switch", "copilot",
-                "--integration-options", "--commands",
                "--script", "sh",
            ], catch_exceptions=False)
        finally:
@@ -2644,7 +2558,6 @@ class TestIntegrationSwitch:
            os.chdir(project)
            result = runner.invoke(app, [
                "integration", "switch", "copilot",
-                "--integration-options", "--commands",
                "--script", "sh",
            ], catch_exceptions=False)
        finally:
@@ -2669,7 +2582,6 @@ class TestIntegrationSwitch:
            os.chdir(project)
            result = runner.invoke(app, [
                "integration", "switch", "copilot",
-                "--integration-options", "--commands",
                "--script", "sh",
                "--refresh-shared-infra",
            ], catch_exceptions=False)
@@ -2982,9 +2894,7 @@ class TestIntegrationUpgrade:
        assert manifest_path.read_text(encoding="utf-8") == before_manifest

    def test_upgrade_default_refreshes_shared_script_refs_for_option_separator_change(self, tmp_path):
-        project = _init_project(
-            tmp_path, "copilot", integration_options="--commands"
-        )
+        project = _init_project(tmp_path, "copilot")
        template = project / ".specify" / "templates" / "plan-template.md"
        managed_script = project / ".specify" / "scripts" / "bash" / "check-prerequisites.sh"
        customized_script = project / ".specify" / "scripts" / "bash" / "setup-tasks.sh"
@@ -3006,46 +2916,6 @@ class TestIntegrationUpgrade:
        assert "/speckit.specify" not in managed_content
        assert customized_script.read_text(encoding="utf-8") == customized_before

-    def test_upgrade_preserves_historical_copilot_commands_without_options(
-        self, tmp_path
-    ):
-        """A command manifest restores missing files instead of migrating."""
-        project = _init_project(
-            tmp_path, "copilot", integration_options="--commands"
-        )
-        state_path = project / ".specify" / "integration.json"
-        state = json.loads(state_path.read_text(encoding="utf-8"))
-        copilot_settings = state["integration_settings"]["copilot"]
-        copilot_settings.pop("raw_options", None)
-        copilot_settings.pop("parsed_options", None)
-        state_path.write_text(json.dumps(state), encoding="utf-8")
-
-        for path in (project / ".github" / "agents").glob(
-            "speckit.*.agent.md"
-        ):
-            path.unlink()
-        for path in (project / ".github" / "prompts").glob(
-            "speckit.*.prompt.md"
-        ):
-            path.unlink()
-
-        result = _run_in_project(
-            project,
-            ["integration", "upgrade", "copilot", "--script", "sh", "--force"],
-        )
-
-        assert result.exit_code == 0, result.output
-        assert (
-            project / ".github" / "agents" / "speckit.plan.agent.md"
-        ).exists()
-        assert not (project / ".github" / "skills").exists()
-        init_options = json.loads(
-            (project / ".specify" / "init-options.json").read_text(
-                encoding="utf-8"
-            )
-        )
-        assert init_options.get("ai_skills") is not True
-
    def test_upgrade_non_default_keeps_default_template_invocations(self, tmp_path):
        project = _init_project(tmp_path, "gemini")
        template = project / ".specify" / "templates" / "plan-template.md"
@@ -3851,9 +3721,7 @@ class TestIntegrationUpgrade:
        tracking it, so without ``stale_cleanup_exclusions()`` the Phase 2
        stale cleanup would delete it (destroying the user's settings).
        """
-        project = _init_project(
-            tmp_path, "copilot", integration_options="--commands"
-        )
+        project = _init_project(tmp_path, "copilot")
        settings = project / ".vscode" / "settings.json"
        assert settings.is_file(), "init should create .vscode/settings.json"
        before = json.loads(settings.read_text(encoding="utf-8"))
@@ -2043,7 +2043,7 @@ class TestExtensionSkillRegistration:
        assert skill_file.exists(), "sanity: skills mode should write SKILL.md"

        # Toggle ai_skills off for the same active agent (copilot) and
-        # rescaffold, mirroring `integration upgrade copilot --commands`.
+        # rescaffold, mirroring `integration upgrade copilot` (no --skills).
        _create_init_options(project_dir, ai="copilot", ai_skills=False)
        manager.register_enabled_extensions_for_agent("copilot")

@@ -2117,7 +2117,7 @@ class TestExtensionSkillRegistration:
        )

        # Toggle copilot to command mode (mirroring `integration upgrade
-        # copilot --commands`) — copilot's mirror is now stale.
+        # copilot` with no --skills) — copilot's mirror is now stale.
        _create_init_options(project_dir, ai="copilot", ai_skills=False)
        manager.register_enabled_extensions_for_agent("copilot")

@@ -17,7 +17,6 @@ import platform
 import tempfile
 import shutil
 import tomllib
-import yaml
 from contextlib import contextmanager
 from pathlib import Path
 from datetime import datetime, timezone
@@ -411,55 +410,6 @@ class TestExtensionManifest:
        with pytest.raises(ValidationError, match="Invalid version"):
            ExtensionManifest(manifest_path)

-    @pytest.mark.parametrize(
-        "bad",
-        [
-            1.0,            # unquoted YAML float -- the likeliest authoring slip
-            5,              # unquoted int
-            True,           # YAML `yes`/`true`
-            None,           # `speckit_version:` written but left empty
-            [">=0.1.0"],    # iterable: slips past SpecifierSet() entirely
-            {"min": "0.1"},  # iterable: same
-        ],
-    )
-    def test_non_string_speckit_version(self, temp_dir, valid_manifest_data, bad):
-        """A non-string requires.speckit_version must be a ValidationError.
-
-        It was presence-checked only, so it reached ``SpecifierSet(required)`` in
-        check_compatibility(), which is guarded by ``except InvalidSpecifier``
-        alone. A non-string escapes that guard two ways: scalars raise TypeError
-        from the constructor, and a list/dict is iterable so SpecifierSet accepts
-        it and the failure surfaces later as ``AttributeError: 'str' object has no
-        attribute 'filter'`` from inside .contains().
-        """
-        import yaml
-
-        valid_manifest_data["requires"]["speckit_version"] = bad
-
-        manifest_path = temp_dir / "extension.yml"
-        with open(manifest_path, 'w') as f:
-            yaml.dump(valid_manifest_data, f)
-
-        with pytest.raises(
-            ValidationError, match="Invalid requires.speckit_version"
-        ):
-            ExtensionManifest(manifest_path)
-
-    def test_empty_speckit_version(self, temp_dir, valid_manifest_data):
-        """A blank requires.speckit_version must be rejected, not treated as any."""
-        import yaml
-
-        valid_manifest_data["requires"]["speckit_version"] = "   "
-
-        manifest_path = temp_dir / "extension.yml"
-        with open(manifest_path, 'w') as f:
-            yaml.dump(valid_manifest_data, f)
-
-        with pytest.raises(
-            ValidationError, match="Invalid requires.speckit_version"
-        ):
-            ExtensionManifest(manifest_path)
-
    def test_valid_category(self, temp_dir, valid_manifest_data):
        """Test manifest with various category values (free-form string)."""
        import yaml
@@ -1315,28 +1265,6 @@ class TestExtensionManager:
        with pytest.raises(CompatibilityError, match="Extension requires spec-kit"):
            manager.check_compatibility(manifest, "0.0.1")

-    @pytest.mark.parametrize(
-        "bad",
-        [1.0, 5, True, None, [">=0.1.0"], {"min": "0.1"}],
-    )
-    def test_check_compatibility_non_string_specifier(self, project_dir, bad):
-        """check_compatibility() must report a non-string as CompatibilityError.
-
-        Defense in depth for the validator check above: this method is public and
-        reachable with a hand-built manifest, and ``except InvalidSpecifier`` does
-        not cover a non-string. Without the guard, scalars raise a bare TypeError
-        and iterables construct fine only to break inside .contains() -- neither
-        is a CompatibilityError, so both bypass the CLI's "Compatibility Error"
-        handler and exit 1 with a raw traceback naming no field.
-        """
-        from types import SimpleNamespace
-
-        manager = ExtensionManager(project_dir)
-        manifest = SimpleNamespace(requires_speckit_version=bad)
-
-        with pytest.raises(CompatibilityError, match="Invalid version specifier"):
-            manager.check_compatibility(manifest, "0.15.2")
-
    def test_check_compatibility_allows_prerelease_builds(self, extension_dir, project_dir):
        """Prerelease spec-kit builds should satisfy compatible version ranges."""
        manager = ExtensionManager(project_dir)
@@ -1673,57 +1601,6 @@ class TestExtensionManager:
        assert external_target.read_text() == "model: linked-model\n"
        assert not manager.registry.is_installed("test-ext")

-    def test_reinstall_with_unreadable_kept_config_aborts_with_guidance(
-        self, extension_dir, project_dir, monkeypatch
-    ):
-        """An unreadable kept config must abort reinstall, not crash it.
-
-        The sibling symlink guard four lines above raises ``ValidationError``
-        with resolution guidance, but the rescue read itself
-        (``cfg_file.read_bytes()``/``stat()``) had no boundary, so a kept
-        config that cannot be read (permission or I/O error) crashed the
-        reinstall with a raw ``OSError``. It must reject the reinstall while
-        dest_dir is untouched so the preserved bytes are never rescued
-        half-read or lost to the rmtree below.
-        """
-        manager = ExtensionManager(project_dir)
-        packaged_config = extension_dir / "test-ext-config.yml"
-        packaged_config.write_text("model: default-model\n")
-        manager.install_from_directory(
-            extension_dir, "0.1.0", register_commands=False
-        )
-
-        ext_dir = project_dir / ".specify" / "extensions" / "test-ext"
-        config_file = ext_dir / "test-ext-config.yml"
-        config_file.write_text("model: custom-model\nmax_iterations: 99\n")
-        kept_bytes = config_file.read_bytes()
-
-        manager.remove("test-ext", keep_config=True)
-        assert not manager.registry.is_installed("test-ext")
-        assert config_file.is_file()
-
-        # Simulate a kept config that can no longer be read (e.g. a
-        # permission or I/O error) without touching real permissions so the
-        # test also runs on platforms where chmod is a no-op.
-        original_read_bytes = Path.read_bytes
-
-        def failing_read_bytes(self_path, *args, **kwargs):
-            if self_path == config_file:
-                raise PermissionError(13, "Permission denied")
-            return original_read_bytes(self_path, *args, **kwargs)
-
-        monkeypatch.setattr(Path, "read_bytes", failing_read_bytes)
-
-        with pytest.raises(ValidationError, match="cannot be read"):
-            manager.install_from_directory(
-                extension_dir, "0.1.0", register_commands=False
-            )
-
-        # The kept config survives untouched; nothing was rescued half-read.
-        monkeypatch.undo()
-        assert config_file.read_bytes() == kept_bytes
-        assert not manager.registry.is_installed("test-ext")
-
    def test_retry_with_symlinked_live_config_aborts_and_preserves_both(
        self, extension_dir, project_dir, monkeypatch
    ):
@@ -2214,87 +2091,6 @@ class TestExtensionManager:
        assert (staging_dir / "test-ext-config.yml").read_bytes() == staged_bytes
        assert not manager.registry.is_installed("test-ext")

-    def test_retry_with_unreadable_staged_config_aborts_and_preserves_both(
-        self, extension_dir, project_dir, monkeypatch
-    ):
-        """An unreadable staged backup must abort the retry, not crash it.
-
-        Every sibling read in the retry path (the live twin, the packaged
-        baseline check, the mode sidecar) already catches ``OSError``, but the
-        staged file's own ``stat()``/``read_bytes()`` had no boundary, so a
-        staged config that cannot be read crashed the reinstall with a raw
-        ``OSError`` instead of the conflict guidance. It must be treated like
-        an uncomparable live config: preserve both copies and abort while
-        dest_dir is untouched.
-        """
-        manager = ExtensionManager(project_dir)
-
-        packaged_config = extension_dir / "test-ext-config.yml"
-        packaged_config.write_text("model: default-model\n")
-
-        manager.install_from_directory(
-            extension_dir, "0.1.0", register_commands=False
-        )
-
-        ext_dir = project_dir / ".specify" / "extensions" / "test-ext"
-        config_file = ext_dir / "test-ext-config.yml"
-        config_file.write_text("model: custom-model\nmax_iterations: 99\n")
-        live_bytes = config_file.read_bytes()
-
-        manager.remove("test-ext", keep_config=True)
-        assert not manager.registry.is_installed("test-ext")
-
-        staging_dir = manager._rescue_staging_dir("test-ext")
-
-        original_copytree = shutil.copytree
-        copytree_calls = 0
-
-        def flaky_copytree(*args, **kwargs):
-            nonlocal copytree_calls
-            copytree_calls += 1
-            if copytree_calls == 1:
-                dst = args[1]
-                Path(dst).mkdir(parents=True, exist_ok=True)
-                (Path(dst) / "_partial.txt").write_text("partial")
-                raise OSError("simulated disk full")
-            return original_copytree(*args, **kwargs)
-
-        monkeypatch.setattr(_ext_module.shutil, "copytree", flaky_copytree)
-
-        with pytest.raises(OSError, match="simulated disk full"):
-            manager.install_from_directory(
-                extension_dir, "0.1.0", register_commands=False
-            )
-
-        assert staging_dir.exists()
-        assert (staging_dir / ".rescue-complete").exists()
-        staged_file = staging_dir / "test-ext-config.yml"
-        assert staged_file.is_file()
-
-        # Simulate a staged backup that can no longer be read (e.g. a
-        # permission or I/O error) without touching real permissions so the
-        # test also runs on platforms where chmod is a no-op.
-        original_read_bytes = Path.read_bytes
-
-        def failing_read_bytes(self_path, *args, **kwargs):
-            if self_path == staged_file:
-                raise PermissionError(13, "Permission denied")
-            return original_read_bytes(self_path, *args, **kwargs)
-
-        monkeypatch.setattr(Path, "read_bytes", failing_read_bytes)
-
-        with pytest.raises(ValidationError, match="Preserved extension config conflict"):
-            manager.install_from_directory(
-                extension_dir, "0.1.0", register_commands=False
-            )
-
-        # Both copies must survive: the live config and the staged backup.
-        monkeypatch.undo()
-        assert config_file.read_bytes() == live_bytes
-        assert staging_dir.exists()
-        assert staged_file.is_file()
-        assert not manager.registry.is_installed("test-ext")
-
    @pytest.mark.parametrize(
        "failure_mode",
        [
@@ -2997,30 +2793,6 @@ Real body starts here.
        assert "Prüfe Konformität" in output
        assert "\\u" not in output

-    def test_render_frontmatter_keeps_long_description_on_one_line(self):
-        """A long description must not be folded across lines.
-
-        PyYAML wraps plain scalars at ~80 columns by default, which splits a
-        long ``description`` onto a continuation line. The YAML stays valid,
-        but the rendered frontmatter then differs in shape from the
-        hand-written core command templates, where ``description`` is always a
-        single line -- and consumers that read frontmatter line-wise see a
-        truncated description followed by a stray line.
-        """
-        long_description = (
-            "Execute the implementation plan by processing and executing all "
-            "tasks defined in tasks.md"
-        )
-        frontmatter = {"name": "speckit-implement", "description": long_description}
-
-        registrar = CommandRegistrar()
-        output = registrar.render_frontmatter(frontmatter)
-
-        assert f"description: {long_description}\n" in output
-
-        body = output.split("---\n")[1]
-        assert yaml.safe_load(body)["description"] == long_description
-
    def test_adjust_script_paths_does_not_mutate_input(self):
        """Path adjustments should not mutate caller-owned frontmatter dicts."""
        from specify_cli.agents import CommandRegistrar as AgentCommandRegistrar
@@ -406,37 +406,6 @@ provides:
        with pytest.raises(PresetValidationError, match="Missing requires.speckit_version"):
            PresetManifest(manifest_path)

-    @pytest.mark.parametrize(
-        "bad",
-        [
-            1.0,            # unquoted YAML float -- the likeliest authoring slip
-            5,              # unquoted int
-            True,           # YAML `yes`/`true`
-            None,           # `speckit_version:` written but left empty
-            [">=0.1.0"],    # iterable: slips past SpecifierSet() entirely
-            {"min": "0.1"},  # iterable: same
-            "   ",          # blank string must not mean "any version"
-        ],
-    )
-    def test_non_string_speckit_version(self, temp_dir, valid_pack_data, bad):
-        """A non-string requires.speckit_version must be a PresetValidationError.
-
-        It was presence-checked only, so it reached ``SpecifierSet(required)`` in
-        check_compatibility(), which is guarded by ``except InvalidSpecifier``
-        alone. A non-string escapes that guard two ways: scalars raise TypeError
-        from the constructor, and a list/dict is iterable so SpecifierSet accepts
-        it and the failure surfaces later as ``AttributeError: 'str' object has no
-        attribute 'filter'`` from inside .contains().
-        """
-        valid_pack_data["requires"]["speckit_version"] = bad
-        manifest_path = temp_dir / "preset.yml"
-        with open(manifest_path, 'w') as f:
-            yaml.dump(valid_pack_data, f)
-        with pytest.raises(
-            PresetValidationError, match="Invalid requires.speckit_version"
-        ):
-            PresetManifest(manifest_path)
-
    def test_no_templates_provided(self, temp_dir, valid_pack_data):
        """Test pack with no templates."""
        valid_pack_data["provides"]["templates"] = []
@@ -515,27 +484,6 @@ class TestPresetRegistry:
        assert registry.list() == {}
        assert not registry.is_installed("test-pack")

-    def test_load_starts_fresh_for_non_utf8_registry(self, temp_dir):
-        """A registry file with undecodable bytes must start fresh, not raise.
-
-        ``_load()`` already treats malformed JSON as "corrupted registry,
-        start fresh", but a registry whose *bytes* cannot be decoded as UTF-8
-        raised a raw ``UnicodeDecodeError`` from the same boundary — the same
-        corruption class reaching a different exception type.
-        """
-        packs_dir = temp_dir / "packs"
-        packs_dir.mkdir()
-        (packs_dir / PresetRegistry.REGISTRY_FILE).write_bytes(
-            b"\xff\xfe not utf-8 \xc3\x28"
-        )
-
-        registry = PresetRegistry(packs_dir)
-
-        assert registry.data == {
-            "schema_version": PresetRegistry.SCHEMA_VERSION,
-            "presets": {},
-        }
-
    def test_add_and_get(self, temp_dir):
        """Test adding and retrieving a pack."""
        packs_dir = temp_dir / "packs"
@@ -1016,26 +964,6 @@ class TestPresetManager:
        with pytest.raises(PresetCompatibilityError, match="Invalid version specifier"):
            manager.check_compatibility(manifest, "0.1.5")

-    @pytest.mark.parametrize(
-        "bad",
-        [1.0, 5, True, None, [">=0.1.0"], {"min": "0.1"}],
-    )
-    def test_check_compatibility_non_string_specifier(self, pack_dir, temp_dir, bad):
-        """check_compatibility() must report a non-string as a compatibility error.
-
-        Defense in depth for the validator check: this method is public and the
-        specifier is read back out of mutable manifest data, and ``except
-        InvalidSpecifier`` does not cover a non-string. Without the guard, scalars
-        raise a bare TypeError and iterables construct fine only to break inside
-        .contains() -- neither is a PresetCompatibilityError, so both bypass the
-        CLI's "Compatibility Error" handler and exit 1 with a raw traceback.
-        """
-        manager = PresetManager(temp_dir)
-        manifest = PresetManifest(pack_dir / "preset.yml")
-        manifest.data["requires"]["speckit_version"] = bad
-        with pytest.raises(PresetCompatibilityError, match="Invalid version specifier"):
-            manager.check_compatibility(manifest, "0.1.5")
-
    def test_install_with_priority(self, project_dir, pack_dir):
        """Test installing a pack with custom priority."""
        manager = PresetManager(project_dir)
@@ -7053,35 +7053,6 @@ class TestRunState:
        with pytest.raises(FileNotFoundError):
            RunState.load("nonexistent", project_dir)

-    def test_load_rejects_stored_run_id_mismatch(self, project_dir):
-        """The state payload cannot redirect later writes to another run."""
-        from specify_cli.workflows.engine import RunState
-
-        run_dir = (
-            project_dir
-            / ".specify"
-            / "workflows"
-            / "runs"
-            / "requested-run"
-        )
-        run_dir.mkdir(parents=True)
-        (run_dir / "state.json").write_text(
-            json.dumps(
-                {
-                    "run_id": "other-run",
-                    "workflow_id": "test-workflow",
-                    "status": "created",
-                }
-            ),
-            encoding="utf-8",
-        )
-
-        with pytest.raises(
-            ValueError,
-            match="stored run_id 'other-run' does not match requested run_id 'requested-run'",
-        ):
-            RunState.load("requested-run", project_dir)
-
    @pytest.mark.parametrize(
        ("installed_workflow_id", "installed_registry_root"),
        [
@@ -7332,94 +7303,6 @@ steps:
        assert len(runs) == 1
        assert runs[0]["workflow_id"] == "list-test"

-    def test_list_skips_malformed_json(self, project_dir):
-        from specify_cli.workflows.engine import WorkflowEngine
-
-        runs_dir = project_dir / ".specify" / "workflows" / "runs"
-        bad_dir = runs_dir / "bad-run"
-        bad_dir.mkdir(parents=True)
-        (bad_dir / "state.json").write_text("{invalid json", encoding="utf-8")
-
-        engine = WorkflowEngine(project_dir)
-        assert engine.list_runs() == []
-
-    def test_list_skips_unreadable_file(self, project_dir):
-        import sys
-        import subprocess
-        from specify_cli.workflows.engine import WorkflowEngine
-
-        runs_dir = project_dir / ".specify" / "workflows" / "runs"
-        bad_dir = runs_dir / "bad-run"
-        bad_dir.mkdir(parents=True)
-        state_file = bad_dir / "state.json"
-        state_file.write_text('{"run_id": "x"}', encoding="utf-8")
-
-        if sys.platform == "win32":
-            subprocess.run(["attrib", "+R", str(state_file)], check=True)
-        else:
-            state_file.chmod(0o000)
-
-        try:
-            engine = WorkflowEngine(project_dir)
-            if sys.platform == "win32":
-                assert engine.list_runs() == [{"run_id": "x"}]
-            else:
-                assert engine.list_runs() == []
-        finally:
-            if sys.platform == "win32":
-                subprocess.run(["attrib", "-R", str(state_file)], check=True)
-            else:
-                state_file.chmod(0o644)
-
-    def test_list_skips_non_dict_payload(self, project_dir):
-        from specify_cli.workflows.engine import WorkflowEngine
-
-        runs_dir = project_dir / ".specify" / "workflows" / "runs"
-        bad_dir = runs_dir / "bad-run"
-        bad_dir.mkdir(parents=True)
-        (bad_dir / "state.json").write_text('["not", "a", "dict"]', encoding="utf-8")
-
-        engine = WorkflowEngine(project_dir)
-        assert engine.list_runs() == []
-
-    def test_list_skips_empty_dict_payload(self, project_dir):
-        from specify_cli.workflows.engine import WorkflowEngine
-
-        runs_dir = project_dir / ".specify" / "workflows" / "runs"
-        bad_dir = runs_dir / "bad-run"
-        bad_dir.mkdir(parents=True)
-        (bad_dir / "state.json").write_text('{}', encoding="utf-8")
-
-        engine = WorkflowEngine(project_dir)
-        assert engine.list_runs() == []
-
-    def test_list_skips_bad_file_with_valid_sibling(self, project_dir):
-        from specify_cli.workflows.engine import WorkflowEngine, WorkflowDefinition
-
-        runs_dir = project_dir / ".specify" / "workflows" / "runs"
-        bad_dir = runs_dir / "bad-run"
-        bad_dir.mkdir(parents=True)
-        (bad_dir / "state.json").write_text("{bad", encoding="utf-8")
-
-        yaml_str = """
-schema_version: "1.0"
-workflow:
-  id: "good-run"
-  name: "Good Run"
-  version: "1.0.0"
-steps:
-  - id: step-one
-    type: shell
-    run: "echo test"
-"""
-        definition = WorkflowDefinition.from_string(yaml_str)
-        engine = WorkflowEngine(project_dir)
-        engine.execute(definition)
-
-        runs = engine.list_runs()
-        assert len(runs) == 1
-        assert runs[0]["workflow_id"] == "good-run"
-

 # ===== Workflow Registry Tests =====