Conciseness

The body is lean — code-first sections with comments only where they add non-obvious info (e.g. the ".ts file extension... build failure" warning), no explanation of concepts Claude already knows. Not 5: there is redundancy — the TL;DR restates the description, the "All Infrastructure Components Reference" table repeats the inline examples, and the "Quick Reference" repeats the imports from the handler example.

Actionability

Code is copy-paste ready and complete for setup: full handler implementation, `CorePulumi.createImplementation` export, registration JSX, and the deploy command (`yarn webiny deploy core`). Not 5: the central capability — actually modifying resources — is left as comments ("// Access and modify Pulumi resources here", `app: any`) with no worked example of reading or changing a resource property.

Workflow Clarity

The write-handler → register-in-config → deploy sequence is present but scattered across sections and only consolidated implicitly in the "Quick Reference"; there are no validation checkpoints (e.g. how to preview the Pulumi stack or verify the build before deploying). This matches anchor 3 — sequence present, checkpoints missing or implicit — rather than 4, which requires most checkpoints to be explicit.

Progressive Disclosure

No bundle files exist, and the ~195-line body is well organized into clear, navigable sections (TL;DR, handler pattern, per-topic component examples, reference table, quick reference, related skills) with no nested references. Not 5: the skill exceeds the simple-skill threshold and inlines a full component reference table that would sit more naturally in a separate reference file, with the body pointing to it.

Specificity

The description enumerates many concrete actions — "add Pulumi handlers, configure OpenSearch, VPC, resource tags, regions, custom domains, blue-green deployments, environment-conditional config" — giving comprehensive, concrete coverage of the skill's capabilities rather than vague language. Not 4: there are no meaningful coverage gaps; the action list matches the body's full component set.

Completeness

Explicitly answers "what" ("Modifying AWS infrastructure using Pulumi handlers and declarative Infra components") and "when" with a concrete trigger clause ("Use this skill when the developer wants to customize AWS infrastructure, add Pulumi handlers, configure..."). Matches the anchor-5 example pattern exactly; not 4 because the "when" clause is explicit and enumerates concrete triggers rather than being merely adequate.

Trigger Term Quality

Strong natural terms users would say ("custom domains", "blue-green deployments", "resource tags", "regions", "OpenSearch", "VPC", "production vs development"), but synonyms and file-level cues are missing (e.g. "infrastructure as code", "webiny.config.tsx", "Pulumi stack"). Not 5: anchor 5 requires synonyms and file extensions, which are absent.

Distinctiveness Conflict Risk

The Webiny/Pulumi/`<Infra.*>` niche is clear with distinct triggers ("CorePulumi.Interface", "<Infra.Env.Is>", "webiny.config.tsx" concepts), creating minimal conflict risk with generic AWS skills. Not 5: there is minor overlap risk with closely related sibling skills it itself references (e.g. a webiny project-structure skill also covering webiny.config.tsx).