The body is lean and domain-specific — reason-code enumerations, hook-stage tables, and InMemoryProvider config are OpenFeature specifics Claude does not already know, with no padding about basic programming concepts. Every section earns its tokens, matching the score-3 'every token earns its place' anchor rather than the mildly padded 2.

Provides copy-paste-ready, executable TypeScript: the npm install line, a typed InMemoryProvider config, the getBooleanValue/getBooleanDetails calls, and a full Jest-style test file with beforeAll/afterAll teardown. This is the score-3 'fully executable, copy-paste ready' anchor, not the pseudocode of a 2.

The 'How to use' flow is explicitly sequenced install → configure → evaluate → test, with teardown via 'OpenFeature.close()' and an anti-patterns table enforcing readiness/teardown discipline. The testing skill's own assertions serve as the validation checkpoints, so it meets the score-3 clear-sequence bar rather than the implicit-checkpoint 2.

SKILL.md stays an overview of the canonical TypeScript flow and defers Java/Python code plus spec tables to a single, well-signaled one-level-deep file (references/multi-language-and-spec.md), which exists on disk. Clean overview with one-level-deep references matches the score-3 anchor, not the inline-bloated 2.

Lists multiple concrete actions: 'InMemoryProvider for hermetic tests without network calls', 'provider registration via OpenFeature.setProvider', 'getBooleanValue/getBooleanDetails evaluation API', 'hooks for evaluation side-effects', and 'evaluation context for targeting-rule tests'. This matches the score-3 anchor of multiple specific concrete actions, not the partial coverage of a 2.

Explicitly answers both: what ('Wraps OpenFeature... testing patterns...') and when ('Use when writing tests for code that resolves feature flags through the OpenFeature SDK'). The explicit 'Use when...' clause clears the score-3 bar; a missing trigger would have capped it at 2.

Includes natural terms a user would say — 'feature flags', 'OpenFeature SDK', 'writing tests' — alongside the technical specifics. Good coverage of natural trigger terms rather than only jargon, so it sits at 3 and not the 'some keywords but missing variations' of 2.

Frames a clear vendor-neutral niche ('vendor-neutral SDK abstraction', 'regardless of the underlying flag management platform') and explicitly contrasts with vendor-specific siblings, making wrong-skill triggering unlikely. Distinct niche, not the overlapping generality of a 2.