The body is dense and technical with no padding about basics Claude already knows; even the coordinated-omission walkthrough is specialized knowledge central to the skill rather than common-ground explanation. It assumes competence throughout, fitting the score-3 'lean and efficient' anchor; it is above score 2 because the prose consistently earns its tokens.

Provides fully executable, copy-paste-ready guidance: a `k6 run --summary-trend-stats` command, `summaryTrendStats`/`handleSummary`/`thresholds` JS options, and a `jq` read-back against `summary.json`. This matches the score-3 anchor and exceeds score 2 (which would use pseudocode or omit key details).

A clearly sequenced five-step interpretation workflow with an explicit reading order (2a/2b/2c) and cross-check checkpoints (tail-ratio bands, bimodal heuristics, sub-metric breakdown, dropped_iterations red flag) plus an anti-patterns checklist. It meets the score-3 anchor's 'clear sequence with checkpoints'; it is above score 2, which requires missing/implicit checkpoints.

The skill is a ~270-line monolithic body with no bundle/reference files to split into, and external doc links are clearly signaled one level deep. However it keeps detailed material (the Step 3 coordinated-omission deep-dive, the anti-patterns table) fully inline rather than presenting SKILL.md as a tighter overview pointing to detailed materials, fitting the score-2 anchor ('content that should be separate is inline'). It is below score 3 because there is no progressive split of the deeper material.

Lists multiple concrete actions: 'reads percentile summaries and JSON exports to identify tail shape, computes the tail ratio (p99/p50)... detects bimodal distributions, explains coordinated omission... distinguishes request-rate from concurrency models'. This matches the score-3 anchor ('Lists multiple specific concrete actions'); it is above score 2 because the actions are comprehensive and specific rather than partial.

Explicitly answers both 'what' (the interpretation actions) and 'when' via a clear 'Use when...' clause with three concrete triggers. This matches the score-3 anchor and is above score 2, where the 'when' is only implied.

Uses natural terms a user would say when needing this skill: 'k6 load tests', 'p95/p99 gate', 'threshold passes but the system still feels slow', 'p99 is suspiciously low during ramp-up', 'tail latency'. Good coverage of natural phrasings; not merely technical jargon, so it sits above score 2.

Occupies a clear niche (k6 latency-distribution interpretation beyond p95/p99 gates) with distinct triggers unlikely to fire for unrelated skills. It is well above score 2 ('could still overlap with similar skills') because the k6 + tail-latency + coordinated-omission framing is highly specific.