Flat-skills installs write SKILL.md files under gsd-<cmd>/ dirs, but
Claude Code resolves skills by their frontmatter `name:`, not directory
name. PR #2595 normalized every `/gsd-<cmd>` to `/gsd:<cmd>` across
workflows — including inside `Skill(skill="...")` args — but the
installer still emitted `name: gsd-<cmd>`, so every Skill() call on a
flat-skills install resolved to nothing.
Fix: emit `name: gsd:<cmd>` (colon form) in
`convertClaudeCommandToClaudeSkill`. Keep the hyphen-form directory
name for Windows path safety.
Codex stays on hyphen form: its adapter invokes skills as `$gsd-<cmd>`
(shell-var syntax) and a colon would terminate the variable name.
`convertClaudeCommandToCodexSkill` uses `yamlQuote(skillName)` directly
and is untouched.
- Extract `skillFrontmatterName(dirName)` helper (exported for tests).
- Update claude-skills-migration and qwen-skills-migration assertions
that encoded the old hyphen emission.
- Add `tests/bug-2643-skill-frontmatter-name.test.cjs` asserting every
`Skill(skill="gsd:<cmd>")` reference in workflows resolves to an
emitted frontmatter name.
Full suite: 5452/5452 passing.
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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