Conciseness

The body is mostly efficient (tables, commands, terse phases), but the trailmark diff `--language` default pitfall is repeated in four places (Rationalizations table, Phase 3, Diff Reference, Quality Checklist), the intro paragraph restates the frontmatter description nearly verbatim, and the severity-classification table duplicates content that report-format.md's own contents list claims to cover. This goes beyond anchor 4's "minor instances" of over-explanation, fitting anchor 3's "could be tightened".

Actionability

Guidance is fully executable: worktree bash commands with mktemp, a working Python build/export snippet using the trailmark API, fully-flagged diff commands with an install fallback, and argument/output-key tables for graph_diff.py. The only stub is the comment-only Quick Start block, which does not reduce the copy-paste readiness of the actual workflow, so this sits at anchor 5 rather than anchor 4.

Workflow Clarity

Five clearly sequenced phases with a progress checklist, a decision tree for entry points, explicit validation checkpoints (verify both graph summaries, "stop and report the error" on failed/empty diffs, node-count-based disambiguation of empty diffs, language retry guidance), and a pre-delivery Quality Checklist. This matches anchor 5's explicit validation, error-recovery feedback loops, and checklists; anchor 4 is ruled out because no checkpoint is missing.

Progressive Disclosure

Both referenced files (references/evolution-metrics.md, references/report-format.md) and the referenced script (scripts/graph_diff.py) exist, are one level deep, and are well signaled via the Decision Tree, inline links, and a Supporting Documentation section. It falls short of anchor 5 because the inline severity-classification and interpretation-priority tables overlap with report-format.md's stated contents, so some content that should live solely in the reference remains in the overview.

Specificity

The description lists multiple concrete actions ("Detects new attack paths, complexity shifts, blast radius growth, taint propagation changes, and privilege boundary modifications") within a clearly scoped domain ("Compares Trailmark code graphs at two source code snapshots (git commits, tags, or directories)"). Coverage is comprehensive with no padding, matching the top anchor rather than anchor 4 because no capability area is missing.

Completeness

It explicitly answers both questions: what it does ("Compares Trailmark code graphs at two source code snapshots... to surface security-relevant structural changes") and when to use it, with five concrete trigger phrases in the "Use when..." clause. This mirrors the anchor-5 example pattern exactly, and is above anchor 4 because the "when" half is specific, not merely present.

Trigger Term Quality

The "Use when" clause offers good natural phrasing ("comparing code between commits or tags", "attack surface growth", "what changed between audit snapshots"), but common variations users would naturally say — e.g. "before/after comparison", "release diff", "security diff" — are absent. It exceeds anchor 3 (relevant keywords present) but does not reach anchor 5's comprehensive synonym coverage.

Distinctiveness Conflict Risk

The two-snapshot structural-diff niche is distinct and the phrase "that text diffs miss" actively steers away from line-diff skills, but triggers like "comparing code between commits or tags" overlap with closely related sibling skills (single-snapshot trailmark analysis, text-diff review). Minor overlap risk with closely related skills matches anchor 4 rather than anchor 5's "minimal conflict risk".