Conciseness

Dense and operational throughout — it assumes Claude's competence (no explaining what git bisect or a debugger is) and every section is actionable rules rather than padded explanation. Minor repetition of the "re-read the execution path from scratch" theme across Hard Rules, Confirm or Discard, and rationalization smells keeps it just below the lean 5 anchor.

Actionability

Fully executable guidance with concrete commands ("git status --short --branch -uall", "git diff <last-good>..HEAD -- <suspect path>", "git bisect good/bad", "sample <process>", "sw_vers", "grep -rn"), specific file:line examples, and copy-paste output/handoff templates covering the common cases.

Workflow Clarity

Multi-step processes are explicitly sequenced with validation checkpoints (Runtime Evidence Ladder 1–5, Native App Freeze evidence 1–4, Bisect Mode, regression guard red-green run), plus feedback loops (Confirm or Discard, hard stops, 3-hypothesis handoff) — no destructive/batch cap applies since validation is pervasive.

Progressive Disclosure

Clear overview body with five well-signaled one-level-deep references ("See references/durable-context.md", "Load references/failure-patterns.md", etc.), all of which exist and contain no nested references — content appropriately split with easy navigation.

Specificity

Names the concrete core action ("Finds root cause before applying fixes") and comprehensively enumerates defect categories ("errors, crashes, regressions, failing tests, broken behavior, screenshot-reported defects"), but action diversity is essentially single-verb rather than the multiple distinct actions the 5 anchor expects.

Completeness

Explicitly answers what ("Finds root cause before applying fixes for ...") and when ("Use when users report in any language ...") with concrete trigger phrases, plus an explicit exclusion ("Not for code review or new features").

Trigger Term Quality

Comprehensive natural-language triggers users actually say ("errors, crashes, broken behavior, regressions, failing tests, screenshot evidence") plus the synonym phrase "something that used to work and now fails", matching the 5 anchor's coverage including synonyms.

Distinctiveness Conflict Risk

Clear niche (root-cause diagnosis for defects) with an explicit out-of-scope clause ("Not for code review or new features") and distinct triggers, giving minimal conflict risk.