Conciseness

The body is dense with craft-specific guidance (one-way-door Decision Log format, temporal non-goals, migration states, verifiable tasks) and avoids explaining concepts Claude already knows. However, the "Mandatory execution order" list restates every step header that follows, and the closing "## Non-goals" section repeats rules already stated in Steps 1, 6, and 7 (don't skip mapping, don't write ADRs, don't silently resolve open questions) — trimmable redundancy that keeps it below the lean top anchor.

Actionability

Fully executable for an instruction-only skill: exact OpenKnowledge verb calls (exec("ls -A proposals/"), write({ document: { path: "specs/004-payment-retries/spec.md", template: "spec" } })), copy-paste markdown blocks for Decision Log and Open Questions entries, complete frontmatter YAML, and a recap template. Concrete examples cover the common cases at every step.

Workflow Clarity

A 12-step (0–11) explicitly sequenced process with HARD GATEs (parent proposal, current-system map, scoping STOP gate), an autonomy-mode table governing gate behavior, and an explicit validation feedback loop in Step 10 ("audit(...) returns clean (every lint violation + broken internal link) — fix every finding") plus a final recap checklist. This matches the top anchor: clear sequence, explicit validation, error-recovery loops, and a checklist.

Progressive Disclosure

This is a ~290-line monolithic SKILL.md with no bundle: no references/, scripts/, or assets/ directories exist, and the spec/spec-plan/spec-tasks templates it invokes are not part of this bundle. Internal sectioning and navigation are good, but nothing is split out — e.g., Step 9's plan.md/tasks.md detail is only needed post-greenlight and the DL/OQ template blocks could live in references — so it sits at "some structure but could be better organized" rather than the well-split 4, while clearly above the minimal-structure 2.

Specificity

The description lists multiple concrete actions covering the entire spec-writing workflow: "write an implementation spec under specs/ from an accepted proposal — current-system mapping, goals/non-goals, a Decision Log for one-way-door choices, a live Open Questions backlog, and a real migration + test plan". This matches the anchor for comprehensive coverage of specific concrete actions; a 4 would require a minor coverage gap, and none is present.

Completeness

Both what and when are answered explicitly and concretely: the what is the full enumeration of spec artifacts, and the when is the explicit "Read when asked to..." clause with five concrete trigger phrases plus negative triggers. It clearly matches the top anchor; a 4 would require the when to be only implicit or less specific.

Trigger Term Quality

"Read when asked to write a spec, scope this feature, turn this proposal into a spec, plan the implementation, or break this into tasks" provides natural trigger phrasings with synonym-level variation users would actually say. This is comprehensive keyword coverage per the top anchor, not merely good coverage with a few missing terms.

Distinctiveness Conflict Risk

It carves a clear niche (spec from an accepted proposal) and explicitly de-conflicts four siblings: "Do NOT fire on frame a proposal or write the PRD... record a decision or write the ADR (record-a-decision), write a postmortem (write-a-postmortem), or review this design (review-a-design)". Minimal conflict risk; the neighboring 4 anchor would imply only minor overlap risk with no explicit boundary.