Conciseness

The ~196-line body systemically repeats itself: the temporary-probe-location rule appears in Core Rules (lines 30-31), Temporary Probe Scripts (131-133), and the authoring loop (137-141); the tsc/ts-node typecheck loop appears at lines 37, 67-72, 139-141, and 161; env-var approval guidance appears at lines 28, 33, and 62; and the redis.io guidance at line 35 is restated verbatim in references/redis-runtime-patterns.md. This is several padded, redundant sections rather than occasional over-explanation.

Actionability

Commands are concrete and executable (mktemp -d, npx tsc --noEmit -p "$tmpdir/tsconfig.json", TS_NODE_TRANSPILE_ONLY=true node -r ts-node/register) with a complete tsconfig.json example and exact matrix columns. The score is capped below 5 because the referenced scaffold ./templates/typescript_probe.ts does not exist, breaking the copy-paste-ready coverage the body points to.

Workflow Clarity

The 19-step workflow is clearly sequenced with validation checkpoints (preflight, typecheck before first live run, three live-probe gates, approval wait, matrix filled with 'actual outcomes, not guesses', artifact deletion after report) and feedback loops (stop and rewrite a disallowed plan). It falls short of anchor 5 because ioredis-specific steps are interleaved throughout and the malformed sub-list indentation in steps 5 and 14 makes the sequence harder to follow.

Progressive Disclosure

Headers and purpose-signaled one-level references exist ('Open [X](./references/X.md) when you need...'), but roughly 100 lines of ioredis probe-authoring detail are inlined in the body that duplicate references/repo-import-patterns.md and redis-runtime-patterns.md, and the body points twice to a nonexistent ./templates/typescript_probe.ts. This matches 'content that should be separate is inline' rather than the well-split anchor 4.

Specificity

'Plan and execute runtime-behavior investigations with temporary TypeScript probe scripts, validation matrices, state controls, and findings-first reports' lists several concrete artifacts and actions. It stops short of anchor 5 because it omits the actual integration scope the body targets (ioredis/Redis), leaving minor coverage gaps.

Completeness

'What' is explicit (plan and execute runtime-behavior investigations with probe scripts, matrices, state controls, reports) and 'when' is explicit with concrete trigger guidance ('Use only when the user explicitly invokes this skill to verify actual runtime behavior... especially to uncover edge cases, undocumented behavior, or common failure modes'). Both halves match the anchor 5 pattern; it is not 4 because neither is merely implied or generic.

Trigger Term Quality

Natural user phrasings are present ('verify actual runtime behavior', 'edge cases', 'undocumented behavior', 'common failure modes', 'happy-path', 'smoke check'), giving good keyword coverage. Not anchor 5: common synonyms such as 'probe', 'test the actual behavior', or named integrations are missing.

Distinctiveness Conflict Risk

'Runtime-behavior investigations', 'temporary TypeScript probe scripts', and 'do not stop at happy-path confirmation' carve a distinct niche with only minor overlap with generic testing/verification skills, further reduced by the manual-only invocation constraint. It is not 5 because 'verify runtime behavior' could still plausibly overlap broader verification skills.