Lean and efficient: a short motivating overview, an actionable 'How to use' sequence, and inline code, with detail offloaded to references; no padding explaining generic concepts Claude already knows.

Provides executable inline TypeScript (withFlags harness) and a runnable generator command, with the references containing complete copy-paste-ready Node/Python/Java wiring, the full gen-flag-matrix.py script, and CI YAML.

A clear 7-step 'How to use' sequence with an explicit feedback checkpoint — 'fail-fast: false so every failing combination surfaces' plus per-combination result aggregation — appropriate for this batch/matrix operation.

SKILL.md is an overview with well-signaled one-level-deep references (provider-wiring.md, matrix-and-ci.md, anti-patterns-and-limits.md), all of which are real files; content is appropriately split with easy navigation.

Lists multiple concrete actions: 'Builds a test harness', 'picks the minimum cover', 'wires an OpenFeature in-memory provider', 'runs each combination as its own labeled CI matrix shard', and 'emits a per-combination result matrix' — matching the multi-action anchor.

Explicitly answers both: what ('Builds a test harness that runs the same suite under every relevant flag combination...') and when ('Use when a feature behind a flag must be verified on AND off...'), satisfying the explicit-trigger anchor.

Good coverage of natural terms a user would say — 'feature behind a flag', 'verified on AND off', 'release toggles', 'experiment toggles', 'deterministic and parallel' — alongside the core 'feature flag' trigger; not merely jargon.

A clear niche — OpenFeature in-memory provider + minimum-cover flag-combination CI sharding — with distinct triggers unlikely to fire for unrelated skills.