Conciseness

The body is tables of bare commands with no concept explanations, no padding, and no restating of things Claude already knows ("Conventions (not auto-triggers) agents execute at specific lifecycle points" is the only prose). Every token earns its place — the 5 anchor.

Actionability

Mostly concrete, executable commands (`rg -n "keyword" .opencastle/LESSONS-LEARNED.md`, `opencastle doctor`, `gh issue view TAS-XX --json body -q '.body'`), but three gaps keep it from 5: pipes in table cells are markdown-escaped (`rg -n "ERROR\|FAIL" ... \|\| true`) so the commands are corrupted when copied, `opencastle log --type session ...` trails off with a literal ellipsis, and "keyword"/"TAS-XX" placeholders are unexplained. This is the 4 anchor (concrete commands, minor gaps) rather than 3 because the commands are real, not pseudocode — the defects are fixable transcription artifacts.

Workflow Clarity

The lifecycle is explicitly sequenced with an ASCII diagram, on-pre-delegate has a hard gate ("All 6 must pass before the sub-agent is dispatched"), and on-post-delegate has verification with an error-recovery loop ("Move to Done or re-delegate; 3rd failure → .opencastle/AGENT-FAILURES.md") plus per-AC verification. Clear sequence, explicit validation steps, feedback loops, and checklists — the 5 anchor; validation is present throughout, so the missing-validation cap does not apply.

Progressive Disclosure

The body cites "See [HOOKS-REFERENCE.md](HOOKS-REFERENCE.md)" three times for extended startup checks, example commands per check, and detailed verification commands — but no bundle directory exists and HOOKS-REFERENCE.md is nowhere in the skill, so the promised detail layer is missing entirely and navigation dead-ends exactly where a reader needs the extended commands. References are clearly signaled (4-anchor trait) but broken, and the body (~74 lines) exceeds the under-50-line simple-skill exception, so it cannot score 5 on sections alone.

Specificity

The description enumerates concrete actions for all four hooks — "scans LESSONS-LEARNED.md, resumes checkpoints", "verifies tracker issues, file partitions", "runs fast-review, CI checks", "runs the health checks, writes logs" — giving multiple specific actions with comprehensive coverage across the domain. This matches the 5 anchor (multiple specific concrete actions, comprehensive); it is not the 4 anchor because the gaps are only in phrasing abbreviation, not missing coverage.

Completeness

It explicitly answers both questions: "what" is the four named hooks with their actions, and "when" is the concrete "Use when starting a new session, running pre-flight checks before delegation, coordinating between agents, reviewing a completed handoff, or wrapping up a session" clause backed by trigger terms. This matches the 5 anchor; a missing or weak when-clause would cap it at 3, but the when-guidance here is explicit and specific.

Trigger Term Quality

The explicit trigger list ("multi-agent setup, delegate tasks, agent coordination, session management, run pre-flight checks, start a new session, coordinate between agents, wrap up session") plus the when-clauses gives good natural-phrase coverage. A few natural variations users would say are missing (e.g. "handoff", "spawn/dispatch sub-agents", "task delegation"), so it sits at the 4 anchor rather than the comprehensive synonym coverage of 5.

Distinctiveness Conflict Risk

The multi-agent lifecycle-hook niche ("on-pre-delegate verifies tracker issues, file partitions") is well-distinguished from generic skills, but broad terms like "session management" and "agent coordination" carry minor overlap risk with other agent-orchestration or session-persistence skills. Mostly distinct with minor overlap — the 4 anchor.