feat(tools): add Command Code support as a skills-only tool

[Angelthebestone]

Part of #1614

Summary

Summary by CodeRabbit

• New Features

  • Added Command Code integration for openspec init.
  • OpenSpec skills are now installed under .commandcode/skills/.
  • Command Code users can invoke OpenSpec workflows with /openspec-* commands.
  • Added Command Code to the supported tools list.
  • Added continue as an accepted tool option for openspec init --tools.
  • Command Code initialization now uses skills without generating additional commands.

• Documentation

  • Updated CLI and supported-tools documentation with the new tool options and integration details.

[coderabbitai]

📝 Walkthrough

Walkthrough

Command Code is added as a skills-only tool. Configuration, documentation, detection, initialization behavior, tests, and release-note coverage are included.

Changes

Command Code support

Layer / File(s)	Summary
Register and document Command Code src/core/config.ts, docs/cli.md, docs/supported-tools.md, test/core/available-tools.test.ts	Adds the command-code tool ID and .commandcode skills directory. Documents invocation details and supported IDs. Validates directory detection.
Validate skills-only initialization test/core/init.test.ts, .changeset/friendly-commandcode-support.md	Verifies skill installation under .commandcode/skills, /openspec-* references, omitted command generation, and the adapterless log message. Records the minor release change.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• Fission-AI/OpenSpec#1208: Adds skills-only tool configuration and adapterless initialization tests.
• Fission-AI/OpenSpec#1303: Adds skills-only tool targets with /openspec-* invocation and related tests.
• Fission-AI/OpenSpec#1404: Adds adapterless tool support and tests skill-reference behavior.

Suggested reviewers: clay-good, tabishb, alfred-openspec

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: adding Command Code support as a skills-only tool.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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_{Comment @coderabbitai help to get the list of available commands.}

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@docs/supported-tools.md`:
- Line 73: Update the skills-only invocation table near the existing Command
Code documentation so it includes Command Code with its skill-based
`/openspec-*` invocation and no generated command files, matching the newly
added command-code row and keeping both sections consistent.

🪄 Autofix

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 757d12c6-7b23-4ead-8719-0efe3b3a9571

📥 Commits

Reviewing files that changed from the base of the PR and between e50bd09 and c8e5040.

📒 Files selected for processing (6)

• .changeset/friendly-commandcode-support.md
• docs/cli.md
• docs/supported-tools.md
• src/core/config.ts
• test/core/available-tools.test.ts
• test/core/init.test.ts