Conciseness

The body is disciplined and assumes Claude's competence (no concept re-teaching), but "What is covered in this Skill?", "When to use this skill", and the Constraints section partially restate one another and the frontmatter trigger list, so minor trimming is possible — anchor 4 ('efficient; minor instances… could be trimmed'), not 3 since there is no unnecessary explanation, only structural overlap.

Actionability

Steps give concrete checklists ("toggle type, stable name, typed decision API, default state, evaluation context, fallback behavior, audit needs, metrics, logs, and cleanup trigger") but the body contains no executable code or commands — all Java examples live in the reference — so it fits 'mostly executable guidance; minor gaps' rather than the copy-paste-ready anchor 5, and comfortably above the vague/pseudocode anchors.

Workflow Clarity

A clear six-step sequence (classify → design → boundaries → review → test → report) with review and test checkpoints, but no explicit feedback loops or error-recovery guidance (no 'if review fails, revise the contract and re-check'), which keeps it below anchor 5's 'explicit validation steps; feedback loops for error recovery'.

Progressive Disclosure

The body is a lean overview that routes all detail to a single verified, well-signaled, one-level-deep reference (references/057-design-feature-toggles.md), linked in the constraints, workflow step 1, and a dedicated Reference section — matching 'clear overview with well-signaled one-level-deep references' exactly; anchor 4 would require organization gaps that are not present.

Specificity

Lists several specific actions paired with concrete toggle artifacts ("designing, implementing, reviewing, testing, or cleaning up feature toggles, feature flags, kill switches"), but the verbs are generic lifecycle categories rather than the fully concrete operations of the anchor-5 example, so it fits 'several specific actions; minor gaps' rather than the level above.

Completeness

Explicitly answers both halves: the what (design/implement/review/test/cleanup of toggles in Java enterprise systems) and a concrete explicit when ("Use when… This should trigger for requests such as…"). Not 4 because the when-clause is already maximally explicit with concrete trigger phrases, not merely adequate.

Trigger Term Quality

Comprehensive natural-term coverage including synonyms ("feature toggles, feature flags, kill switches, runtime configuration gates, canary controls, staged rollouts") and verbatim user phrasings ("Review this feature flag; Add a kill switch safely; Test toggle on and off paths"), which matches the comprehensive-synonyms anchor; the level below would require missing common variations.

Distinctiveness Conflict Risk

Scoped to "Java enterprise systems" with distinctive toggle vocabulary, but "canary controls, staged rollouts" and "Part of Plinth Toolkit" create minor overlap risk with closely related deployment/rollout and sibling toolkit skills, fitting 'mostly distinct; minor overlap risk' rather than the minimal-conflict anchor 5.