Conciseness

The body is dominated by tight CORRECT/WRONG code pairs with no basic-concept padding (no 'what is Angular' or library tutorials), so most tokens earn their place. It falls short of anchor 5 because of the duplicated 'When to Use' section at the end containing pure filler ('This skill is applicable to execute the workflow or actions described in the overview.') and some redundant WRONG examples that could be trimmed.

Actionability

Every rule ships copy-paste-ready, executable TypeScript/HTML using concrete APIs (forkJoin/switchMap, @defer with hydration triggers, track expressions, provideZonelessChangeDetection, TransferState, takeUntilDestroyed), plus concrete checklists. This matches the anchor for fully executable, common-case-covering guidance.

Workflow Clarity

The priority table (CRITICAL → LOW-MEDIUM) sequences where to attack first, and the three checklists (New Component, Performance Review, SSR Check) act as validation checkpoints. It is not a 5 because there is no explicit apply/review workflow with verification steps such as measuring the bundle (source-map analysis) or profiling change detection before and after applying rules.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are absent), so all ~550 lines of detailed rules are inlined in SKILL.md. Internal structure is good (clear sections and a priority table), but content that clearly belongs in separate reference files — e.g. the eight detailed rule categories — is inline with no pointers to deeper material, matching anchor 3 rather than 4.

Specificity

The description names the domain ('Angular performance optimization') with 1-2 actions ('optimization', 'best practices guide'), but 'best practices' is generic buzzword-level language rather than a list of concrete capabilities. It matches anchor 3 (domain and 1-2 concrete actions, not comprehensive), not 4, which requires several specific actions such as 'eliminates async waterfalls, lazy-loads routes, configures SSR hydration'.

Completeness

Both parts are explicitly present: the what ('Angular performance optimization and best practices guide') and an explicit when ('Use when writing, reviewing, or refactoring Angular code for optimal performance, bundle size, and rendering efficiency'). It fits anchor 4 rather than 5 because the what-side leans generic ('best practices guide') instead of concretely stating what the skill contains.

Trigger Term Quality

'writing, reviewing, or refactoring Angular code', 'bundle size', and 'rendering efficiency' are natural phrases users would say, giving good keyword coverage. It falls short of anchor 5 because common variations like 'slow Angular app', 'make it faster', 'lazy loading', or 'change detection' are missing.

Distinctiveness Conflict Risk

'Angular' carves out a clear niche with distinct triggers, so it is mostly distinguishable from other skills. However, 'best practices' breadth means it could also trigger for non-performance Angular tasks (styling, testing, architecture), which is minor overlap risk — anchor 4, not 5.