Conciseness

Almost every sentence carries non-obvious operational knowledge (200/404 semantics, 30-day idle caveat, flush/shutdown behavior) with no explanation of basics, but the key/units fact ('Key = the same key getTreatment uses... value units must match the metric's format') is repeated verbatim in the intro and Phase 6, and the 30-day inventory caveat recurs across Phase 7. Mostly efficient with a few trimmable repetitions — anchor 4, not 3, since nothing is padding or common knowledge.

Actionability

Gives exact tool invocations ('harness_get · fme_metric · params: { metric_id }' with CLI equivalents), a precise retry policy ('roughly 30s apart for about 2 minutes'), concrete verification checks (trafficTypes membership, 200 vs 404 meaning), and a defined pre-live test checklist. As an instruction-only skill the guidance is fully executable end-to-end.

Workflow Clarity

Seven explicitly sequenced phases with named stop conditions ('wait for confirmation before editing', 'do not deploy automatically'), validation checkpoints (mocked tests before any live trigger; traffic-type check on the event-type response), error-recovery loops ('report delivery unverified and investigate rather than declaring the code broken'), and a closing three-item summary checklist.

Progressive Disclosure

References (tool-map.md, sdk-patterns.md, language-guidance.md, metric-design.md, scope-establishment.md) are all one level deep and each link is signaled with its purpose. Held at 4 rather than 5 because the ~83-line body inlines dense Phase 7 caveat detail that could sit in a reference, and no bundle files are present in this tree to verify the referenced structure.

Specificity

Lists several concrete actions — 'wire up a track() call', 'placed at the real outcome', 'verify it arrives' — with explicit negative scoping against create-metric and choose-metric. Not a 5 because coverage is limited to wiring and verifying rather than comprehensively describing the workflow; better than 3 since the actions carry precise qualifiers beyond a bare domain mention.

Completeness

Explicitly answers both 'what' ('wire up a track() call... and verify it arrives') and 'when' with a dedicated concrete trigger-phrase list, matching the anchor-5 example structure exactly.

Trigger Term Quality

'Trigger phrases: instrument this event, add a track call, wire up tracking, verify the event arrives' gives four natural user phrasings. Falls short of anchor 5's comprehensive synonym coverage (e.g., 'event tracking', 'analytics', 'send an event' are absent) but clearly exceeds anchor 3's partial keyword set.

Distinctiveness Conflict Risk

'Doesn't create the metric (create-metric) or choose it (choose-metric)' actively disambiguates the two nearest sibling skills, and the track()-instrumentation niche is distinct with dedicated trigger phrases — minimal conflict risk.