Lean, terse bullet structure with no padding of concepts Claude already knows; the one-line overview adds a genuinely domain-specific fact and every token earns its place.

Provides copy-paste-ready executable commands (rg search patterns, 'php bin/spc dev:lint-config', a focused phpunit invocation) and concrete file paths per package kind, fully actionable rather than descriptive.

The 5-step Quick Workflow is clearly sequenced and includes an explicit validation checkpoint ('Validate narrowly, then broadly if risk warrants it') with lint, focused tests, and full checks, avoiding the destructive-operation cap.

Overview points to two clearly signaled, one-level-deep references (references/package-reference.md, references/build-class-patterns.md) that exist as real bundle files, with content appropriately split and easy to navigate.

Lists multiple concrete actions ('adding, modifying, reviewing, or validating') applied to specific package/artifact domains, matching the 'lists multiple specific concrete actions' anchor.

Explicitly states what ('Maintain StaticPHP v3 packages and artifacts') and when ('Use when adding, modifying, reviewing, or validating...'), satisfying both halves with an explicit trigger clause.

Covers natural domain trigger terms a maintainer would say — extension/library/target/tool, dependencies, PHP configure args, build hooks, package metadata, tests and docs — giving good coverage rather than a single keyword.

Scoped to a clear niche (StaticPHP v3, config/pkg, config/artifact, src/Package) with distinct triggers unlikely to collide with unrelated skills.