Conciseness

Overall lean and information-dense, assuming Go competence (no 'what is a benchmark' padding), but minor trims exist: justificatory prose on file conventions ('the two rarely share the same shape') and version-specific notes (Go 1.24/1.26/1.27) not isolated in a deprecated section. Not 5 per the time-sensitive-information guideline; not 3: padding is incidental, not structural.

Actionability

Fully executable throughout: copy-paste `b.Loop()` / `ReportAllocs()` / sub-benchmark code, a complete `go test -bench` flag table with output-format decoding, exact pprof/trace commands, and a realistic benchstat commit-message template. Covers the common cases end to end.

Workflow Clarity

The section order (write → run → compare variants → document → profile) forms a clear sequence, with real checkpoints like 'Never paste results with `~` (no statistical significance)' and 'rerun the before benchmark on the same toolchain'. Not 5: no numbered step sequence with explicit feedback/recovery loops or checklists; the sequence and checkpoints are implied by section layout rather than laid out as a process.

Progressive Disclosure

SKILL.md is a clean overview; all 8 referenced files exist in ./references/ and each is one level deep, linked with a 'Use this when...' purpose signal. Reference files cross-link only to siblings (e.g., benchstat.md → ci-regression.md), never to a second nested level. Cross-references to sibling skills are cleanly separated in their own section.

Specificity

Lists multiple specific concrete actions — 'writing, running, or comparing Go benchmarks, profiling hot paths with pprof, interpreting CPU/memory/trace profiles, analyzing results with benchstat, setting up CI benchmark regression detection, or investigating production performance with Prometheus runtime metrics' — with comprehensive coverage of the domain. Not 4: coverage spans writing, running, profiling, comparison, CI, and production investigation with no notable gaps.

Completeness

Explicitly answers what ('Golang benchmarking, profiling, and performance measurement' plus enumerated capabilities) and when ('Use when writing, running, or comparing Go benchmarks...' plus a second 'Also use when the developer needs deep analysis on a specific performance indicator'). Concrete trigger phrases match the anchor-5 example structure exactly.

Trigger Term Quality

Good natural keyword coverage: 'Go benchmarks', 'profiling', 'pprof', 'benchstat', 'performance', 'regression detection', 'Prometheus runtime metrics'. Not 5: a few natural phrases users would say are absent (e.g., 'allocations', 'memory usage', 'make my code faster'); not 3: the included terms are the natural vocabulary, not jargon-only.

Distinctiveness Conflict Risk

Clear niche (measurement vs. optimization) with an explicit boundary: 'this skill provides the measurement methodology, while `samber/cc-skills-golang@golang-performance` provides the optimization patterns'. This minimizes wrong-skill triggering against the closely related performance skill; not 4: the conflict boundary is explicitly stated, not merely implied.