Conciseness

The body is efficient and code-first, assuming Flutter/Dart competence (no explanation of what DI or a service locator is), e.g. terse comment-annotated registration snippets. It misses anchor 5 because inline version-sensitive notes ("Since 9.3.0", "v9.3.0+", "watch_it 2.5.0+") are not consolidated into a compat/deprecated section, and a few prose passages (the scope-shadowing paragraph, the tear-off rule bullet) could be tightened.

Actionability

Nearly every section is copy-paste-ready executable Dart covering the common cases — registration, async init with the init() pattern, retrieval, scopes, ready-state, testing with setUp/tearDown, plus ❌/✅ anti-pattern pairs like "await on pushNewScope (it's void, not Future)". This matches the fully-executable anchor with broad case coverage.

Workflow Clarity

Section order mirrors the service lifecycle (Registration → Async Initialization → Retrieval → Scopes → Ready State → Testing), ordering rules are explicit ("Register all services BEFORE runApp()"), and the production patterns include recovery flows (popScopesTill on error, tearDown after scope-based mocks). It falls short of anchor 5 because there is no single explicit end-to-end setup sequence with validation checkpoints tying the sections together.

Progressive Disclosure

The ~260-line body is well-sectioned but entirely inlined, including reference-depth material (Utility Methods, Reference Counting, findFirstObjectRegistration details) that fits the anchor-3 example of "200 lines of API reference that could be in a separate file". It is not a 2 because headers make it navigable, but not a 4 because there are no external reference files at all despite the volume of detail.

Specificity

Lists multiple concrete, parameterized capabilities — "registration (singleton, factory, lazy, async), scopes with shadowing, async initialization with init() pattern, retrieval, testing with scope-based mocking, and production patterns" — with comprehensive coverage of the library's surface. It exceeds the anchor-4 example (several specific actions, minor gaps) because no significant capability area is missing.

Completeness

Explicitly answers both questions: a clear what ("Expert guidance on get_it service locator and dependency injection for Flutter/Dart. Covers registration…") and a concrete when ("Use when working with get_it, dependency injection, service registration, scopes, or async initialization"), matching the anchor-5 good example pattern exactly. It is not a 4 because the 'when' is already explicit and specific rather than improvable.

Trigger Term Quality

The trigger clause "Use when working with get_it, dependency injection, service registration, scopes, or async initialization" has good natural-phrase coverage, and "service locator" appears in the what-clause. It falls short of anchor 5 because common synonyms like "DI", "service locator" (in the trigger itself), and "registering services" are absent.

Distinctiveness Conflict Risk

"get_it service locator and dependency injection for Flutter/Dart" names a specific package and platform, giving it a clear niche with distinct triggers and minimal conflict risk against generic DI or Flutter-widget skills. Not a 4, since even closely related skills (e.g., watch_it, provider) are disambiguated by the explicit get_it triggers.