Add Command Code integration to spec-kit (#4019)

* Add Command Code integration to spec-kit

Adds `command-code` as a built-in skills-based integration so Spec Kit can
be installed into Command Code. Command Code loads agent skills from
`.commandcode/skills/speckit-<name>/SKILL.md` and invokes them in chat as
`$speckit-<command>`.

- New `CommandCodeIntegration` (SkillsIntegration) writing to
  `.commandcode/skills/`; declared multi-install safe (static, isolated
  agent root).
- Register in `_register_builtins()` and the integration catalog.
- Add `command-code` to `DOLLAR_SKILLS_AGENTS` so next-steps guidance
  renders `$speckit-*` invocations.
- Tests: reuse `SkillsIntegrationTests` mixin plus a dollar-invocation
  next-steps test; registry completeness updated.
- Docs: README and docs/reference/integrations.md (supported agents +
  multi-install-safe table).

Co-authored-by: CommandCodeBot <noreply@commandcode.ai>
Assisted-by: Command Code (autonomous)

* Fix issue template agent lists to include command-code

The runtime AGENT_CONFIG now includes command-code, but the GitHub issue
templates and the consistency test's expected key list were not updated,
failing test_issue_template_agent_lists_match_runtime_integrations.

Co-authored-by: CommandCodeBot <noreply@commandcode.ai>
Assisted-by: Command Code (autonomous)

---------

Co-authored-by: CommandCodeBot <noreply@commandcode.ai>

src/specify_cli/_invocation_style.py

@@ -9,7 +9,7 @@ and ``specify init``'s next-steps output stay consistent.
 from __future__ import annotations
 
 # Agents that render $speckit-<name> (chat invocation) when in skills mode.
-DOLLAR_SKILLS_AGENTS: frozenset[str] = frozenset({"codex", "zcode"})
+DOLLAR_SKILLS_AGENTS: frozenset[str] = frozenset({"codex", "zcode", "command-code"})
 
 # Agents that always render /speckit-<name>, regardless of ai_skills.
 ALWAYS_SLASH_AGENTS: frozenset[str] = frozenset({"devin", "droid", "grok", "trae", "zed"})

src/specify_cli/integrations/__init__.py

@@ -56,6 +56,7 @@ def _register_builtins() -> None:
     from .cline import ClineIntegration
     from .codebuddy import CodebuddyIntegration
     from .codex import CodexIntegration
+    from .command_code import CommandCodeIntegration
     from .copilot import CopilotIntegration
     from .cursor_agent import CursorAgentIntegration
     from .devin import DevinIntegration
@@ -95,6 +96,7 @@ def _register_builtins() -> None:
     _register(ClineIntegration())
     _register(CodebuddyIntegration())
     _register(CodexIntegration())
+    _register(CommandCodeIntegration())
     _register(CopilotIntegration())
     _register(CursorAgentIntegration())
     _register(DevinIntegration())

src/specify_cli/integrations/command_code/__init__.py

@@ -0,0 +1,41 @@
+"""Command Code integration — skills-based agent.
+
+Command Code loads agent skills from ``.commandcode/skills/speckit-<name>/SKILL.md``
+(project) or ``~/.commandcode/skills/`` (personal). Skills are invoked in chat
+with ``$speckit-<name>``.
+"""
+
+from __future__ import annotations
+
+from ..base import IntegrationOption, SkillsIntegration
+
+
+class CommandCodeIntegration(SkillsIntegration):
+    """Integration for Command Code CLI."""
+
+    key = "command-code"
+    config = {
+        "name": "Command Code",
+        "folder": ".commandcode/",
+        "commands_subdir": "skills",
+        "install_url": "https://commandcode.ai/docs",
+        "requires_cli": True,
+    }
+    registrar_config = {
+        "dir": ".commandcode/skills",
+        "format": "markdown",
+        "args": "$ARGUMENTS",
+        "extension": "/SKILL.md",
+    }
+    multi_install_safe = True
+
+    @classmethod
+    def options(cls) -> list[IntegrationOption]:
+        return [
+            IntegrationOption(
+                "--skills",
+                is_flag=True,
+                default=True,
+                help="Install as agent skills (default for Command Code)",
+            ),
+        ]