Conciseness

The ~30-line body is lean with every sentence carrying non-obvious instruction — why the hook runs twice ("The second run shows the hook is safe to run more than once"), which files may collide ("AGENTS.md and CLAUDE.md"), and the no-side-effects constraint. No padding or explanation of concepts Claude already knows, matching the anchor-5 example of every token earning its place.

Actionability

Guidance is fully executable: exact commands (`git fetch origin <branch>`, `CI=true bash .tessl/cloud-launch-setup.sh < /dev/null`, `node --version` etc.), precise exit-status handling, and exact field semantics for `launch-result.json` (status values, summary content, last 20 lines for reason). The only parameterization (`<branch>`) is inherently run-specific and resolved by the run's instructions, so there is no gap that would drop it to anchor 4.

Workflow Clarity

A clear 4-step sequence with explicit validation checkpoints — keeping each hook run's exit status and branching in step 4 on "both hook runs exit 0" versus failure — plus a feedback loop for error recovery in step 1 (checkout refused → delete named files → check out again → list in summary). This matches the anchor-5 pattern of explicit validation with retry loops; no destructive or batch operation lacks verification.

Progressive Disclosure

This is a simple single-purpose skill under 50 lines with no external references needed (no references/, scripts/, or assets/ files exist in the bundle), and the content is well organized as a brief orientation paragraph followed by numbered steps. Per the rubric's simple-skill note, this earns the top score on well-organized sections alone.

Specificity

Lists several concrete actions — "Run a branch's setup hook on a Tessl cloud machine", "report its output and what the machine then has", "confirm the hook works in the cloud before it goes live" — covering the task well. The phrase "what the machine then has" is slightly indirect compared to naming the reported artifacts, a minor gap that keeps it below the fully comprehensive anchor 5.

Completeness

Explicitly answers both questions: the "what" is running the branch's setup hook on the cloud machine and reporting its output plus resulting machine state, and the "when" is a concrete "Use when factory setup launches a cloud run to check a setup hook" clause. This matches the anchor-5 example pattern of clear what-and-when with concrete trigger phrases.

Trigger Term Quality

Natural multi-word triggers like "setup hook", "cloud run", "check a setup hook", and "factory setup" match what a user in this domain would say. A few natural variations (e.g. "verify" or "test the hook") are missing, so it fits anchor 4 rather than the comprehensive synonym coverage of anchor 5, and is clearly above the sparse keyword level of anchor 3.

Distinctiveness Conflict Risk

The description occupies a clear niche keyed to domain-specific terms ("Tessl cloud machine", "factory setup", "cloud run to check a setup hook"), making it highly distinguishable from other skills with minimal wrong-trigger risk. Not score 4 because there is no meaningful overlap with neighboring skills — the triggers are uniquely identifying.