fix: quote argument-hint values in SKILL.md frontmatter#513
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Unquoted `argument-hint: [X]` in YAML frontmatter is parsed as a single-element sequence rather than a string. GitHub Copilot CLI 1.0.65 tightened validation and now rejects sequence values, breaking these skills. Wrap the values in double quotes so they parse as strings and keep working across Copilot CLI, Claude Code, and other consumers.
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All contributors have signed the CLA. Thank you! |
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I have read the CLA Document and I hereby sign the CLA |
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Tracking issue: #514 — captures the bug diagnosis and reproducer separately for anyone searching the repo who lands there before this PR. |
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Summary
The nine
SKILL.mdfiles under.claude/skills/currently declare theirargument-hintfrontmatter field as an unquoted bracketed value, e.g.:In YAML, that is a flow-sequence containing a single scalar, not a
string. GitHub Copilot CLI 1.0.65 tightened its skill loader to require
argument-hintto be a string and now rejects these skills at load time.Claude Code has historically been lenient about the same field but is
also moving toward stricter validation (see anthropics/claude-code#22161).
Fix
Wrap the bracketed values in double quotes so they parse as plain
strings, preserving the original hint text while satisfying the stricter
schema:
Nine files touched — the full
dev*workflow plusdev-debug:.claude/skills/dev/SKILL.md.claude/skills/dev-debug/SKILL.md.claude/skills/dev1-start/SKILL.md.claude/skills/dev2-design/SKILL.md.claude/skills/dev3-prd/SKILL.md.claude/skills/dev4-implement/SKILL.md.claude/skills/dev5-review/SKILL.md.claude/skills/dev6-review-fix/SKILL.md.claude/skills/dev7-pr/SKILL.mdNo behavioural change — the rendered hint text is identical, the type is
just now
stringinstead oflist[string].Prior art
argument-hintYAML frontmatter with brackets causes React error #31 and unrecoverable TUI hang anthropics/claude-code#22161 (upstream tracking issue)Test plan
python3 -c "import yaml; yaml.safe_load(open('.claude/skills/dev5-review/SKILL.md').read().split('---',2)[1])"returnsargument-hintasstr(verified locally for all 9 files).CLA
I will sign the CLA in a follow-up comment on this PR per
CLA.md.