Conciseness

The body is two lines — a provenance comment ("Generated by scripts/agent-harnesses.py; do not edit directly.") and a single directive ("Load and follow the shared skill at ~/.agents/skills/omp-hooks/SKILL.md"). Zero padding, nothing explaining concepts Claude already knows; every token earns its place, matching the lean-and-efficient anchor. Not 4, since there is nothing that could be trimmed.

Actionability

"Load and follow the shared skill at `~/.agents/skills/omp-hooks/SKILL.md`" is one concrete, precise directive, but it is the entirety of the guidance — no steps, commands, or examples for the actual hook/extension tasks, which are fully delegated. This matches anchor 3 ("some concrete guidance but incomplete"); not 2 because the directive is specific rather than a high-level hint, and not 4 because the gaps are total rather than minor.

Workflow Clarity

This is a single-task, under-50-line skill whose one action (load the shared skill) is unambiguous, satisfying the simple-skill exception; however the sole step has no verification or fallback, and its target file does not resolve in this environment. Not 5 because there is no error-recovery guidance for the single step; not 3 because the action is fully specified and the destructive/batch validation cap does not apply to a pure load instruction.

Progressive Disclosure

The single reference is clearly signaled and one level deep, but it points outside the bundle to a file that does not exist in this environment (verified: ~/.agents/skills/omp-hooks/SKILL.md is absent), the body itself contains no overview content, and the bundle has no references/, scripts/, or assets/ structure (the commented scripts/agent-harnesses.py is also absent). Not 4 because "most content is appropriately placed" fails — the skill ships zero content, only an unverifiable external pointer; not 2 because the reference is not buried and nothing is inlined.

Specificity

Lists six-plus concrete actions ("blocking or rewriting tool calls, redacting tool output, reshaping LLM context, registering tools/commands, or wiring modules through config.yml") plus topic coverage of "ExtensionAPI (current) vs HookAPI (legacy), the event catalog, discovery and load order, and disable controls". This matches the anchor for multiple specific concrete actions with comprehensive coverage; anchor 4 would require minor gaps, and none are evident for this domain.

Completeness

Explicitly answers both: what ("blocking or rewriting tool calls, redacting tool output, reshaping LLM context, registering tools/commands, or wiring modules through config.yml") and when ("Use when writing, debugging, or configuring an omp hook or extension"), with concrete trigger phrases and sharpening "Not for..." exclusions. The 'Use when' clause is present so no cap applies, and this matches the top anchor's example structure.

Trigger Term Quality

Natural terms a user of this system would say are comprehensively present: "omp hook or extension", "blocking or rewriting tool calls", "redacting tool output", "config.yml", "ExtensionAPI"/"HookAPI", "load order", and "disable controls", with synonyms covered (hook/extension, both API names). Anchor 4 ("a few natural terms missing") fits worse since no common variation for this domain is absent.

Distinctiveness Conflict Risk

Clear niche (omp hooks/extensions) with explicit boundary guidance: "Not for Claude Code hooks (~/.claude/settings.json) or the shared harness safety guard (~/.agents/harness/hooks/)" preemptively excludes the two likeliest mis-trigger targets. Distinct triggers and explicit exclusions give minimal conflict risk, matching the top anchor rather than anchor 4's merely implicit distinctness.