fix(skills): quote argument-hint flow sequence in pr-ready frontmatter (#850)

[shubhransh-gupta]

Summary

Fixes #850.

Quotes the argument-hint value in .claude/skills/pr-ready/SKILL.md frontmatter so that it is parsed as a valid string rather than an invalid unquoted YAML flow sequence.

Changes

• .claude/skills/pr-ready/SKILL.md: argument-hint: "[<pr-number>[,<pr-number>...]]"

Verification

• Verified YAML frontmatter parses cleanly without syntax errors across strict YAML parsers.

[s-annam]

Verdict: APPROVE (0 Blocking, 0 Secondary, 0 Nits)

Exact fix for #850: quotes argument-hint in .claude/skills/pr-ready/SKILL.md so it parses as a plain string instead of an invalid unquoted YAML flow sequence. Verified locally — yaml.safe_load on the frontmatter now parses clean (previously errored expected ',' or ']', but got '[').

Gates

• 3a (fixture PII): N/A, no fixtures touched.
• 3b (design-system/reuse): N/A, no src/components touched.
• 3c (style tokens): N/A.
• 3d (fallow/dead-code): N/A, no exports touched.
• 3e (command-level bugs in skill file): change is a pure frontmatter quoting fix, no gh/bash commands altered — no new command bugs introduced.
• 3f (description accuracy): body is accurate; "Verified YAML frontmatter parses cleanly" checks out.

AC checklist (#850)

• Quote the argument-hint value → done, matches the issue's suggested fix verbatim.
• Issue's "Suggested follow-up" (a mechanical frontmatter-parse check across all skills) is explicitly optional and out of scope for this PR — not required here.

Note (out of scope, not a finding against this PR)

Ran the same YAML sweep across all .claude/skills/*/SKILL.md out of curiosity: probe-jobs/SKILL.md also fails to parse (mapping values are not allowed here) on main today. That's pre-existing and unrelated to this diff — worth its own issue if the follow-up sweep from #850 is ever picked up, but not this PR's problem.

Head reviewed: 9d5c4fb16d002bc89945fa56a5e23e29bb4ec4f9

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Reviewed by: Claude Sonnet 5 (high)