[EndlessBlueWJL]

PR #69 quoted argument-hint for SKILL.md and skills/cheat-init/SKILL.md only. Four skill files
still carry invalid YAML frontmatter, so strict frontmatter parsers reject the file and the host drops
the skill silently — it never appears in the catalog and there is no per-skill diagnostic, only a
host-log warning.

File	Fault
skills/cheat-learn-from/SKILL.md	raw ASCII " in description + unquoted argument-hint
skills/cheat-predict/SKILL.md	same
skills/cheat-publish/SKILL.md	same
skills/cheat-retro/SKILL.md	same

Why each one fails

Both faults are "a value YAML cannot read as a plain scalar":

1. description interleaves raw ASCII double quotes with plain text:

   description: ...触发词:"复盘 [path]"/"retro this"/"T+3d 数据来了"。

   The plain scalar ends early; the parser then reports Unexpected flow-seq-start at node end.

2. argument-hint is unquoted and contains key: value inside a flow sequence:

   argument-hint: <prediction-file> [— window: 3|5|7] [— source: manual|adapter]

   → Nested mappings are not allowed in compact mappings.

Because both live in the frontmatter, the skill body never gets a chance to load.

Fix

Same approach as #69 — only the two header values change, the body is untouched:

• description: raw ASCII quotes → paired Chinese quotes (“…”), alternating open/close so the
  interleaved pattern "A"/"B"/"C" becomes “A”/“B”/“C”.
• argument-hint: wrap the whole value in double quotes, exactly as fix: quote argument-hint YAML values so Copilot CLI ≥1.0.65 loads all skills (closes #68) #69 did for
  SKILL.md / skills/cheat-init/SKILL.md.

Verification

Reproduced with the yaml package parser that hosts ship:

• before: all four fail with Nested mappings are not allowed in compact mappings at line 3, column 16
• after: all four parse cleanly, name / description present, Chinese quotes balanced
  (no orphan “ or ”)
• an audit of all 16 upstream skill files shows these four are the only remaining invalid ones;
  the other 12 parse fine

Affected hosts

Any host that validates frontmatter strictly rather than tolerantly. Confirmed on Copilot CLI ≥1.0.65
(the surface #69 targeted) and on DeepSeek Harness. Tolerant readers (some Claude Code versions) load
these files anyway, which is why the bug stayed hidden.

Files changed

skills/cheat-learn-from/SKILL.md
skills/cheat-predict/SKILL.md
skills/cheat-publish/SKILL.md
skills/cheat-retro/SKILL.md

8 changed lines total (2 per file).

[EndlessBlueWJL]

Closing this in favour of the smaller existing PRs — #73 and #74 already make this exact fix, and they are more minimal than mine.

I also want to correct my own description above. I originally claimed these four files carry two invalid frontmatter values. That was wrong, and I verified it before closing:

Testing with the yaml package parser against upstream main:

variant	result
upstream as-is	fails
fix description only	still fails
fix argument-hint only	parses, all fields present
fix both	parses

So argument-hint is the only cause. The raw ASCII double quotes inside description are valid YAML — double quotes are allowed inside a plain scalar. I confirmed this by leaving them in place and parsing successfully (description length 127, containing 10 ASCII double quotes, no error).

That means this PR's extra change (pairing those quotes into “…”) is cosmetic only and does not fix anything. My earlier one-line-at-a-time fault localisation misled me: parsing description in isolation does error, but that error comes from the line lacking its surrounding block context, not from the quotes.

#73 and #74 each change only the four argument-hint values (4 files, +4 −4) and are sufficient. Mine was +8 −8 with a redundant cosmetic half — the smaller one deserves to land.

Sorry for the duplicate; the correct fix was already in the queue and I should have checked open PRs before opening my own.