Conciseness

The body is lean: sections are short, assume competence (no explanation of what DI or events are in general), and every paragraph carries Webiny-specific rules Claude would not know. Minor redundancy keeps it below the top anchor — 'How to Implement' and 'Injecting Dependencies' show two near-identical handler scaffolds differing only in the injected dependency, which could be collapsed.

Actionability

Mostly executable, copy-paste-ready TypeScript covering the common cases (handler implementation, event definition, publishing from a UseCase, reacting to external CMS events, registration), plus a concrete deploy command. Minor gap: the primary template uses placeholder imports ('SomeEventHandler from "webiny/api/<category>"') requiring substitution, while the external-event example is fully concrete — placing it between 'concrete code with minor gaps' (4) and 'fully executable covering common cases' (5), noticeably above the midpoint.

Workflow Clarity

The sequence is clear and well-ordered: define payloads/handler abstractions in abstractions.ts → event classes in events.ts → publish from the UseCase (before → operation → after) → register in Extension.ts → deploy. The 'Resolving Types (MANDATORY)' section is an explicit numbered pre-flight checkpoint ('read the source file... Do not assume or guess property names'), and Key Rules restate publish order and failure modes. It falls short of the top anchor because there is no post-write validation or feedback loop (e.g., typecheck/build verification after implementing), only the pre-code source-reading checkpoint.

Progressive Disclosure

Section headers are clear and there is helpful cross-skill navigation ('Related Skills', 'See webiny-api-architect'), but the file is a ~290-line monolith with no bundle files: the entire 'Defining Your Own Domain Events' half (~110 lines of abstractions/events/UseCase code) is inlined in SKILL.md where the rubric expects a one-level-deep reference file. This matches 'some structure, but content that should be separate is inline' (3) — it is above the poorly-structured anchor (2) thanks to clean headers and signaled cross-references, but below 'good structure, most content appropriately placed' (4).

Specificity

The description lists multiple concrete actions — 'handle method, event payloads, filtering, DI, domain event definition, publishing events from UseCases, and reacting to external events' — giving comprehensive coverage of the pattern's capabilities within its domain. It matches the anchor for multiple specific concrete actions, and is not below it only in the sense of domain breadth, which is appropriate for a focused skill.

Completeness

It explicitly answers both: what ('EventHandler implementation pattern — handle method, event payloads, filtering, DI, domain event definition, publishing events from UseCases, and reacting to external events') and when ('Use this skill to implement any Webiny EventHandler (before/after hooks) or to define and publish your own domain events'). The 'Use this skill to...' clause provides explicit, concrete trigger guidance, matching the top anchor; without it the score would cap at 3, but it is present.

Trigger Term Quality

Strong natural keywords: 'EventHandler', 'before/after hooks', 'domain events', 'publish events', 'event payloads', 'reacting to external events' — phrases a user working in Webiny would say. Missing a few natural variations/synonyms (e.g., 'subscribe to events', 'listen for events', 'event handler registration'), so it sits between 'good coverage, a few natural terms missing' (4) and comprehensive (5); it is noticeably above the midpoint but not clearly at the top anchor.

Distinctiveness Conflict Risk

The Webiny EventHandler niche is clear and the trigger phrases ('implement any Webiny EventHandler', 'define and publish your own domain events') are distinct from generic skills. There is minor overlap risk with closely related Webiny skills (the body itself lists webiny-use-case-pattern, which also covers event publishing from UseCases), placing it at 'mostly distinct; minor overlap risk' rather than the minimal-conflict top anchor.