Lists multiple specific concrete actions: registering reactive state triggers, firing functions on create/update/delete, keeping derived data in sync, notifying users, invalidating caches, writing audit logs, and running downstream work.

Clearly answers both 'what' (registers reactive state triggers that fire functions on key-value state changes) and 'when' (explicit 'Use whenever' clause with multiple concrete trigger scenarios like 'when X changes, do Y', sync derived data, notify users, etc.).

Excellent coverage of natural trigger terms users would say: 'when X changes, do Y', 'after a record is created/updated/deleted', 'derived data in sync', 'notify users', 'invalidate caches', 'audit logs', 'without polling'. These closely match how users describe reactive/event-driven requirements.

Highly distinctive with a clear niche around reactive state triggers and key-value state change events. The specific focus on event-driven reactions to data mutations (create/update/delete) with concrete use cases like cache invalidation and audit logs makes it unlikely to conflict with other skills.

The content is mostly efficient but includes some redundancy — the 'Common Patterns' section largely repeats information from the 'iii Primitives Used' table and 'Architecture' section. The 'Boundaries' and 'When to Use' sections overlap. Some sections like 'Adapting This Pattern' add value but could be tighter.

The skill provides API signatures and pattern descriptions but no inline executable code — it delegates entirely to reference files. The common patterns section lists function calls but doesn't show a complete, copy-paste-ready example. Without bundle files to verify, the referenced implementations can't be confirmed as existing.

The Architecture section provides a clear flow diagram showing the event chain, and the steps (install worker, register function, register trigger) are implied. However, there are no explicit numbered steps for setup, no validation checkpoints, and no error recovery guidance for when triggers fail to fire or conditions don't match.

References to external files (state-reactions.js/py/rs, iii-config.yaml) are well-signaled and one level deep, which is good. However, no bundle files were provided, so we can't verify these references exist. The main file itself contains some content that could be consolidated (overlapping sections) rather than being cleanly structured.