Mostly efficient, but the 'Key Principles' section restates points already made in the steps and clarifying-question guidance is split across Steps 1 and 3, so it could be tightened.

Gives concrete, copy-paste-ready guidance: named invocations (oac:context-discovery), a filled-in proposal template with explicit fields, and a numeric simple/complex threshold (1–3 vs 4+ files).

A clearly sequenced 6-step process with an explicit HARD-GATE approval checkpoint and an adjust→re-ask feedback loop, satisfying the validation-checkpoint and error-recovery anchors.

Well-organized into Overview, sequenced steps, Key Principles, and a one-level-deep Related section; no bundle files exist and references are to sibling skills rather than nested files, so the single-file structure is appropriate.

Lists multiple concrete actions — 'understands the request, discovers project context, and proposes a concise plan for user approval' — each a distinct, specific step rather than a single vague verb.

It answers both what (understand, discover, propose plan) and when via the explicit trigger 'Use before any implementation', so it is not capped at 2 by the missing-trigger guideline.

The only natural trigger is 'before any implementation'; it is relevant but coverage of common phrasings ('plan before coding', 'review the approach first') is thin, matching the 'some relevant keywords but missing common variations' anchor.

The pre-implementation approval-gate niche is distinct and its 'before any implementation' trigger is specific enough that it is unlikely to fire for unrelated skills.