Conciseness

The body is dense and assumes competence — it never explains general concepts, and the 'What a playbook NEVER contains' section actively prunes redundant content ('A playbook that re-teaches these wastes the 1-2 KB budget'). However, a few points are stated twice: the trigger-test copy appears in the skeleton's Verify section and again in full in fact #3 ('It is never a flask icon'), and the default-field guidance appears both in the Required context placeholder and in fact #1. These minor repetitions could be trimmed, matching the anchor-4 'minor instances of over-explanation that could be trimmed' rather than the every-token-earns-its-place anchor 5.

Actionability

The guidance is fully executable: a complete fill-in markdown skeleton with per-section contents, exact tool and field names (request_input, discover_tools, delta.set.parameters.agent.tools, request_connection, commit_revision, x-ag-stepper), exact file paths for references, and precise formatting rules ('{type: "array", items: {type: "string", enum: [...]}}, oneOf: [{const, title, description}]'). An author can produce the deliverable directly from this plus the worked example it points to.

Workflow Clarity

The sequence is explicit and mapped ('Every section maps to the build loop: Match to step one, Required and Researchable to request_input, Explore to discover_tools plus test_run...'), and checkpoints exist in the form of the 'Read a reference when' table and the worked example for conformance. Minor gap: the authoring workflow itself has no explicit final validation step (e.g., 're-check the finished playbook against prompting-checklist.md and the 1-2 KB budget'), so checkpoints are present but not fully explicit — anchor 4 rather than 5.

Progressive Disclosure

The body is a well-organized overview that pushes detail to one-level-deep references, both of which exist as real files and are clearly signaled in a purpose-mapped table: 'Get the prompting rules... references/prompting-checklist.md' and 'Copy from a complete, spec-conforming example... references/worked-example.md'. An optional spec path is named for when the skeleton is insufficient. Navigation is easy and the split is appropriate — the skeleton and platform facts belong in-body, the checklist and example do not.

Specificity

The description lists multiple concrete, specific elements: 'Write a template playbook', 'a 1-2 KB per-use-case file', 'teaches the builder agent to configure one kind of Agenta agent (changelog writer, issue triager, support router)', and 'Encodes the file format, the prompting checklist, and the platform facts authors get wrong.' Coverage of the deliverable, its size, its audience, and its contents is comprehensive with no vague filler.

Completeness

Both 'what' and 'when' are explicitly answered: the what is a concrete deliverable ('a 1-2 KB per-use-case file that teaches the builder agent to configure one kind of Agenta agent') and the when is an explicit 'Use when' clause with concrete trigger phrases — exactly the anchor-5 pattern.

Trigger Term Quality

The trigger clause gives four natural user phrasings with synonym coverage: "Use when the ask is 'write a template playbook', 'add an agent template', 'author a playbook for the build-an-agent skill', or 'write the <X> playbook'." These are the exact phrasings a user would naturally say, covering write/add/author verb variations and template/playbook synonyms.

Distinctiveness Conflict Risk

The skill occupies a clear niche — authoring playbooks specifically 'for the build-an-agent skill' — and its triggers name that skill explicitly ('author a playbook for the build-an-agent skill'), so it is unlikely to fire for unrelated template- or agent-writing requests. Minimal conflict risk.