Conciseness

The same bug mechanisms are explained three times — in the Fix Status table, in the Background bullets, and again (nearly verbatim for Bug 2 and B4/B5) inside the Output format template — and time-sensitive version numbers pervade the whole file rather than being quarantined in a dated/deprecated section. Not 3 because the Background section and the output template are each substantial duplicated padding; not 1 because the Instructions phases themselves are lean and information-dense.

Actionability

Every phase gives copy-paste-ready bash commands (exact grep patterns, file paths, a per-binary loop) plus explicit version-threshold decision rules mapping each result to a specific flag and status. The output format is a concrete fill-in template covering all branches. Fully executable with no gaps for the common cases.

Workflow Clarity

Phases 1-5 are clearly sequenced ('Run all phases in order, collect every result, and produce the final report') with per-phase decision logic and a defined output format; the audit is read-only, so the destructive/batch validation cap does not apply. Not 5 because there are no explicit validation or verification checkpoints (e.g., cross-checking Phase 1's version against per-binary results in Phase 5, or confirming grep coverage before reporting).

Progressive Disclosure

The file is well-sectioned with headers, but it is a ~300-line monolith with no bundle files at all — the Background (bug explanations, fix-status tables) and the large Output format template are inlined content that would sit better in a separate reference file loaded on demand. Not 4 because content that clearly belongs in separate files is inline; not 2 because section structure and navigation within the file are clear.

Specificity

"Audit Claude Code setup for cache bugs" names the domain and action, and enumerates specific items ("sentinel, --resume/--continue, attribution header + ArkNill B3/B4/B5") that map to what is actually checked. Not 5 because the enumerated items are bug identifiers rather than a comprehensive list of concrete audit actions (e.g., version check, config scan, binary inspection).

Completeness

The "what" is clear (audit Claude Code setup for specific cache bugs), but there is no "Use when..." clause or equivalent trigger guidance — the guidelines cap completeness at 3 in that case. Not 2 because the "what" half is concrete and specific.

Trigger Term Quality

Terms like "Claude Code", "cache bugs", and "--resume" are relevant, but the description leans on technical jargon ("CC#40524", "ArkNill", "sentinel", "attribution header") and omits natural user phrasings such as "cache hit rate", "token cost", or "expensive sessions". Not 4 because common synonyms a user would actually say are missing.

Distinctiveness Conflict Risk

The description targets a uniquely specific niche (a numbered GitHub issue and named bugs B1-B5), so it is clearly distinguishable from any other skill and would not trigger for the wrong skill. Not 4 because the trigger surface is this narrow and no overlap risk exists.