Conciseness

The ~11-line body contains only routing information ("Entry points should NOT read this SKILL.md directly", "This indirection is what saves ~95% of ensure-config token cost") with zero concept re-explanation or padding; every token earns its place by pointing the reader to the right file for their invocation mode.

Actionability

The body gives concrete, executable pointers — exact paths like "${CLAUDE_PLUGIN_ROOT}/skills/arn-code-ensure-config/references/step-0-fast-path.md" and explicit conditional directives (cache hit → skip full validation; direct invocation → "runs the full validation flow"). It falls short of anchor 5 because no commands or exit-code handling appear in the body itself; the executor must open the referenced file before acting.

Workflow Clarity

The conditional sequence is clear: entry points read the fast path, the cache-check gates full validation ("only falls through to the full validation when needed"), and the layer ordering is stated ("Layers 1–3, then Layer 4 cache write"). The actual validation checkpoints (exit 0 vs non-zero with reason surfaced) live in step-0-fast-path.md rather than the body — a minor gap versus anchor 5, but well above anchor 3's missing-checkpoint profile.

Progressive Disclosure

The body is a lean overview with well-signaled, one-level-deep pointers to real bundle files (step-0-fast-path.md for entry points, ensure-config.md for direct invocation), and the ~500-line validation flow is appropriately kept out of SKILL.md. Minor gaps against the actual bundle: ensure-config.md itself chains into other skills' references (template-setup.md, agent-models presets, template-versioning.md — a second hop), and references/preferences-schema.md and specialist-pre-check.md are not reachable from the body's navigation.

Specificity

The only concrete capability stated is "verify that Arness Code configuration is present for the current project"; the remainder is trigger phrasing and consumption metadata ("primarily consumed as a reference by entry-point skills"), not capabilities. This matches anchor 3 (names domain and 1-2 concrete actions) rather than anchor 4, which would require listing several specific actions such as profile checking, ## Arness section creation, or platform label setup.

Completeness

Both halves are present: the what ("verify that Arness Code configuration is present for the current project") and an explicit when ("should be used when the user says…") with concrete trigger phrases, placing it above anchor 3's weakly-implied-when. It falls short of anchor 5 because the what is a single high-level action — thinner than the multi-action concrete example — rather than because the when is imprecise.

Trigger Term Quality

Five explicit natural trigger phrases are provided: "ensure config", "check arness config", "arn-code-ensure-config", "verify arness setup", and "wants to verify that Arness Code configuration is present". Coverage is good but a few natural variants (e.g. "set up arness", "arness config") are absent, so it sits at anchor 4 rather than the comprehensive synonym-level coverage of anchor 5.

Distinctiveness Conflict Risk

Namespaced triggers ("arn-code-ensure-config", "check arness config", "verify arness setup") plus the explicitly enumerated consumer skills carve out a clear niche with distinct triggers and minimal conflict risk with any generic skill, matching anchor 5.