Conciseness

The body is lean and operational — it assumes Claude knows what git/gh are and spends no tokens on background ('Prefer the PowerShell tool for shell commands on Windows, especially anything with quoting'; 'It runs Git Bash (POSIX sh), not cmd or PowerShell'). It falls short of the 5 anchor because the closing 'Rule of thumb' section largely restates guidance already given in the per-shell sections, and 'The trap: it is easy to type one shell's heredoc syntax into the other tool' duplicates the point made by the symptom section — minor trimming opportunities.

Actionability

Fully executable, copy-paste-ready commands cover the common cases: the PowerShell here-string `git commit -m @'...'@` block with the column-0 closing rule, the Bash `git commit -F - <<'EOF'` heredoc, `git commit -m "Subject" -m "Body paragraph."`, and `gh pr create --body-file path/to/body.md`. Each carries the critical literal-vs-expansion details (quoted delimiters, `@'` vs `@"`), matching the 5 anchor.

Workflow Clarity

The decision flow is clear and unambiguous — default to PowerShell, use Bash only for POSIX work, with a symptom-diagnosis section ('A commit message or PR body comes out wrapped in literal characters... a lone `@` line at the very top and bottom') acting as an error-recognition checkpoint and a most-robust fallback (write a file, pass `--body-file` / `-F`). It sits below the 5 anchor because there is no explicit verify step (e.g., checking the committed message before pushing) and no fix-retry loop, only symptom identification; it is clearly above the 3 anchor's 'checkpoints missing or implicit'.

Progressive Disclosure

Single self-contained file with well-organized, clearly headed sections (Default to PowerShell / Multi-line text / PR bodies and long content / Rule of thumb) and no external references — appropriate since the content is short and operational, so nothing is buried or nested. It misses the 5 anchor only because the body runs ~75 lines, above the under-50-line simple-skill exception, and the per-shell quoting recipes and the file-based fallback could plausibly live in a reference file if the skill grows.

Specificity

Quotes concrete actions: "Running shell commands on this Windows checkout via the PowerShell and Bash tools, and passing multi-line or quoted arguments (commit messages, PR bodies, file content) without corruption" — several specific actions with named tools and artifacts. It stops short of the 5 anchor's comprehensive coverage because the write-to-file approach and the corruption-diagnosis capability live only in the body, and the action list is scenario-framed rather than exhaustive.

Completeness

Explicitly answers both: what ("Running shell commands ... via the PowerShell and Bash tools, and passing multi-line or quoted arguments ... without corruption") and when ("Use when running git or gh with multi-line or quoted input, writing a commit message or PR body from the command line, reaching for a heredoc or here-string, or after a message or body comes out wrapped in stray characters"). Both are concrete and the 'when' clause lists four distinct trigger scenarios, matching the 5 anchor exactly; a 4 would require a weaker or less specific 'when'.

Trigger Term Quality

Comprehensive natural-term coverage with synonyms: "git or gh", "multi-line or quoted input", "commit message or PR body", "heredoc or here-string", and the distinctive symptom trigger "wrapped in stray characters such as a leading and trailing `@`". Matches the 5 anchor (synonyms plus concrete variations) and exceeds the 4 anchor's 'a few natural terms missing' — nothing a user or Claude would naturally say here is absent.

Distinctiveness Conflict Risk

The Windows-shell-quoting niche ("this Windows checkout", PowerShell here-strings, Git Bash heredocs) is distinct, and the `@` symptom trigger is unambiguous. Minor overlap risk remains with generic git/PR-body skills via "writing a commit message or PR body from the command line", which could fire outside a Windows quoting context — 'mostly distinct; minor overlap risk' rather than the 5 anchor's minimal conflict risk.