Conciseness

Every step is a terse directive ("Re-read the user's full request, active plan, diff, and live pull-request state") with zero padding and no explanation of concepts Claude already knows; the four lesson filters each earn their place. This matches the lean anchor exactly, and there is nothing to trim without losing information.

Actionability

As an instruction-only skill, the guidance is concrete and specific (map acceptance criteria to evidence, verify branches/worktrees/artifacts, the four lesson filters, the strongest-form ordering), matching anchor 4. Not 5 because steps like the artifact-cleanliness check have no copy-paste-ready commands (e.g. git status --porcelain); not 3 because the directives are specific rather than vague.

Workflow Clarity

A clear 8-step sequence with explicit verification steps at positions 2, 4, and 6 plus a closing assertion ("Finding no obvious bug is not completion. Prove every requested outcome.") and a filter checklist in step 7 — anchor 4. Not 5 because there is no explicit feedback loop for error recovery (e.g. re-run verification until clean after fixing); not 3 because checkpoints are explicit, not merely implied.

Progressive Disclosure

The body is under 50 lines, self-contained, and needs no external references — no references/, scripts/, or assets/ directories exist and the body references none — and the numbered workflow is clearly organized. Per the simple-skill exception this matches the top anchor.

Specificity

One concrete action verb ("Audit the current Fallow session") is paired with five specific audit targets ("missed work, incomplete verification, stale documentation, companion drift, or cleanup"), matching the several-specific-actions anchor with minor coverage gaps. It falls short of 5 because it lists a single action rather than multiple distinct concrete actions.

Completeness

Both "what" (audit for the five named failure modes) and "when" ("before final completion") are explicitly present, matching anchor 4. Not 5 because the when-guidance is a terse temporal qualifier rather than a concrete "Use when the user..." trigger phrase; not 3 because the when is explicitly stated, not merely implied.

Trigger Term Quality

Good natural keyword coverage ("audit", "missed work", "verification", "stale documentation", "cleanup", "before final completion") that users would plausibly say. Not 5 because terms like "companion drift" and "Fallow session" are tool-internal jargon rather than user-voice phrases, and no synonyms or extensions are offered.

Distinctiveness Conflict Risk

It carves a clear niche (end-of-task session sweep within a specific harness) distinct from general skills, but broadly applicable words like "audit", "cleanup", and "stale documentation" carry minor overlap risk with review/cleanup skills. Anchor 5 would require triggers with minimal conflict risk, which these shared words do not fully meet.