feat: v2.3.0 add interactive platform selection to init (#38)

* feat: add interactive platform selection to init

* chore: remove completed OpenSpec artifacts

* chore: remove implemented design note

* fix: protect init lifecycle from unsafe config paths

* fix: support clearing init platforms from CLI

* docs: retire config command from repository rules

* docs: align init lifecycle and clear-platform contracts

* docs: keep repository guidance current-state focused

* docs: limit cleanup to repository-native documents

* docs: preserve historical version notes

---------

Co-authored-by: MerlinH <merlinh221@gmail.com>

docs/ai/repo-rules.md

@@ -31,7 +31,7 @@ Code is the implementation. On code/doc conflict, inspect code, decide whether c
 
 The canonical product boundary is [docs/architecture/product-boundary.md](../architecture/product-boundary.md). This is repo-local policy for developing Truthmark itself; do not treat it as a downstream scaffold, generated surface, or required artifact for repositories that install Truthmark. Read it before generating any new design, implementation plan, generated-workflow redesign, architecture proposal, runtime/dependency change, or command-surface change. New designs and plans must include a product-boundary check that explains how the proposal preserves Truthmark's North Star, in-scope surfaces, explicit non-goals, optional-helper rule, and fail-closed write boundaries.
 
-Truthmark public CLI commands are `config`, `init`, `uninstall`, `check`, `index`, `impact`, `workflow status`, and `validate`. The `workflow status` command exposes a read-only agent-facing state contract; it does not run installed workflows. The `validate` subcommands are optional CLI-owned workflow helper validators; they validate reports or write leases but do not run Truth Structure, Truth Document, Truth Sync, Truth Realize, or Truth Check. Those named workflows are installed workflow surfaces, not top-level CLI commands. Truth Preview is not an installed workflow surface; preview-like routing selection is internal advisory behavior.
+Truthmark public CLI commands are `init`, `uninstall`, `check`, `index`, `impact`, `workflow status`, and `validate`. Repository configuration lives in `.truthmark/config.yml` and is managed by `init`. The `workflow status` command exposes a read-only agent-facing state contract; it does not run installed workflows. The `validate` subcommands validate reports or write leases. Named agent workflows are installed workflow surfaces rather than top-level CLI commands.
 
 Agents inspect the active checkout directly. There is no daemon, database, remote service, hidden memory layer, or product-centered MCP server.
 
@@ -41,7 +41,7 @@ Agents inspect the active checkout directly. There is no daemon, database, remot
 2. Product boundaries are mandatory design inputs. Before generating a new design or plan, read [docs/architecture/product-boundary.md](../architecture/product-boundary.md) and include its product-boundary check in the design/plan artifact.
 3. Rules in this file are a compact behavior contract for observed repository failure modes. Prefer replacing weak or stale rules over accumulating generic prompts, identity statements, examples, or tool-dependent ceremony.
 4. Branch-local Markdown is canonical; the current checkout is the truth boundary.
-5. Current truth belongs in canonical docs, not historical plans or separate timestamped decision logs.
+5. Active docs state current behavior. Keep necessary historical rationale in Product/Engineering Decisions, keep Non-Goals limited to current ownership boundaries, and keep current truth in canonical docs rather than research snapshots, historical plans, or timestamped decision logs.
 6. Active decisions and rationale live in the canonical doc for the governed behavior.
 7. Read owning surfaces before writing: for workflows, skills, prompts, commands, generated instructions, or managed blocks, inspect the nearest canonical doc plus the source renderer, template, schema, or parser before editing.
 8. Generated surfaces are products, not source authority. Edit templates and renderers by default; patch generated output only when explicitly maintaining that generated surface.