Conciseness

The body is command-dense with almost no concept explanation — no 'what a vault is' filler, and every explanation ('The gateway may take a moment to start') is operational, not educational. Not 5 because of minor trims available: the Dashboard/CLI option text repeats near-verbatim across the subscription and API-key paths, and the 'Principle' paragraph is meta-guidance rather than task content.

Actionability

Every step ships a copy-paste command: exact curl health-check URLs, 'onecli secrets create' invocations with all flags and host patterns, PATH-fix shell snippets, a bounded 15-iteration readiness poll loop, and per-platform restart commands. Placeholders like <key> and YOUR_TOKEN are appropriately parameterized, and edge branches (PATH missing, gateway not running) are covered.

Workflow Clarity

Five clearly sequenced phases with explicit validation checkpoints throughout: 'onecli version' verification, health polling with a fallback to 'ps aux' and 'onecli start', 'onecli secrets list' verification before and after removing credentials from .env, build-failure diagnosis with a fix, and log-based verification in Phase 5 plus a troubleshooting section for error recovery. Since the skill destructively edits .env, its verify-before-remove and verify-after-migrate loops satisfy the destructive-operation requirement.

Progressive Disclosure

Well-structured single file: clear phase headers, decision points, and a separate troubleshooting section, with no buried or nested references (no bundle files exist). Not 5 because at ~277 lines everything is inline — the fresh-credential registration paths (subscription vs API key, Dashboard vs CLI) and the troubleshooting entries are self-contained chunks that could live in reference files to keep SKILL.md closer to an overview.

Specificity

Concrete actions named: 'Install and initialize OneCLI Agent Vault', 'Migrates existing .env credentials to the vault' — install, configure, and migrate are specific and real. Falls just below 5 because verification, credential registration, and service restart coverage is absent; above 3 because more than 1-2 actions are named with only minor gaps.

Completeness

Both halves are explicit: 'what' = install, initialize, and migrate .env credentials to the vault; 'when' = 'Use after /update-nanoclaw brings in OneCLI as a breaking change, or for first-time OneCLI setup'. Concrete trigger phrases match the anchor-5 example structure exactly; no 'when' gap to penalize.

Trigger Term Quality

Natural terms present: 'OneCLI', 'Agent Vault', '.env credentials', 'first-time OneCLI setup', and the explicit slash-command trigger '/update-nanoclaw'. Not 5 because there are no additional synonyms or variations users might phrase differently (e.g., 'vault setup', 'credential migration'), but well above generic keyword coverage.

Distinctiveness Conflict Risk

Names a distinct niche ('OneCLI Agent Vault') with a sibling-skill trigger ('/update-nanoclaw') that scopes it precisely; no overlap with generic setup/credential skills. Clear niche with distinct triggers, minimal conflict risk.