feat: add codebase-memory-mcp skill 🤖🤖🤖

[astandrik]

Summary

• add a focused codebase-memory-mcp Agent Skill for graph-backed repository discovery
• require source verification, freshness handling, bounded queries, and safe local fallbacks
• keep the contribution portable by requiring no scripts, bundled binaries, or installation automation

Why this is distinct

acquire-codebase-knowledge produces a fixed documentation set for repository onboarding. This skill instead guides interactive symbol lookup, architecture orientation, dependency and data-flow tracing, and impact analysis through an already configured Codebase Memory MCP server.

Validation

• npm run skill:validate
• npm run build
• bash eng/fix-line-endings.sh
• git diff --check HEAD^ HEAD
• fresh-context RED/GREEN scenarios for structural discovery, stale indexes, literal lookup, unavailable-MCP fallback, and negative triggers

[github-actions]

🔒 PR Risk Scan Results

Scanned 2 changed file(s).

Severity	Count
🔴 High	0
🟠 Medium	1
ℹ️ Info	0

Severity	Rule	File	Line	Match
🟠	package-exec-command	docs/README.skills.md	31	| [acreadiness-assess](../skills/acreadiness-assess/SKILL.md)<br />`gh skills install github/awesome-copilot acreadiness-assess` | Run the AgentRC readiness assessment on the curre

This is an automated soft-gate report. Findings indicate review targets and do not block merge by themselves.

[github-actions]

🔍 Vally Lint Results

✅ All checks passed

Scope	Checked
Skills	1
Agents	0
Total	1

Severity	Count
❌ Errors	0
⚠️ Warnings	0
ℹ️ Advisories	0

Summary

Level	Finding
ℹ️	npm warn EBADENGINE Unsupported engine {
ℹ️	npm warn EBADENGINE package: 'commander@15.0.0',
ℹ️	npm warn EBADENGINE required: { node: '>=22.12.0' },
ℹ️	npm warn EBADENGINE current: { node: 'v20.20.2', npm: '10.8.2' }
ℹ️	npm warn EBADENGINE }
ℹ️	npm warn deprecated prebuild-install@7.1.3: No longer maintained. Please contact the author of the relevant native addon; alternatives are available.
ℹ️	✅ codebase-memory-mcp (2/2 checks passed)
ℹ️	✓ [spec-compliance] All 1 skill(s) are spec-compliant.
ℹ️	✓ spec-compliance: All spec checks passed.
ℹ️	✓ [valid-refs] All file references across 1 skill(s) are valid.

Full linter output

### Linting skills/codebase-memory-mcp
npm warn EBADENGINE Unsupported engine {
npm warn EBADENGINE   package: 'commander@15.0.0',
npm warn EBADENGINE   required: { node: '>=22.12.0' },
npm warn EBADENGINE   current: { node: 'v20.20.2', npm: '10.8.2' }
npm warn EBADENGINE }
npm warn deprecated prebuild-install@7.1.3: No longer maintained. Please contact the author of the relevant native addon; alternatives are available.
✅ codebase-memory-mcp (2/2 checks passed)
    ✓ [spec-compliance] All 1 skill(s) are spec-compliant.
        ✓ spec-compliance: All spec checks passed.
    ✓ [valid-refs] All file references across 1 skill(s) are valid.
        ✓ valid-refs: All file references resolve to existing files within the skill directory.

1 skill(s) linted, 1 passed

[Copilot]

Pull request overview

Adds a portable Agent Skill for safe, graph-backed codebase discovery through Codebase Memory MCP.

Changes:

• Adds workflows for bounded graph queries, freshness checks, and source verification.
• Documents safe local fallbacks and updates the generated skill catalog.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
skills/codebase-memory-mcp/SKILL.md	Defines the new MCP discovery skill.
docs/README.skills.md	Adds the skill to the catalog.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.