Conciseness

The index-only design is efficient and the gotcha blurbs (e.g. 'tsx + node inspect CLI has a silent source-map failure') are non-obvious value, but the 'read the references' exhortation is repeated roughly five times ('READ THE REFERENCES. THIS IS NOT OPTIONAL', 'Every reference below is mandatory', the gate rule, 'If you cannot honestly say you just opened the reference... open it now', 'Failing to use these tools... is a process failure'), which is padded emphasis that could be tightened to one statement. It sits at the anchor of mostly efficient with some unnecessary repetition, not the 'minor instances' level of a 4.

Actionability

The body gives mostly executable guidance: a copy-paste-ready discriminator pipeline ('du -h ./target' plus "strings -n 12 ./target | rg -iE 'bun|node_modules|webpack|...'"), a concrete gate rule, a numbered 'What to Do Right Now' sequence, and precise per-phase entry points. It is not a 5 because most actual commands live in the reference files, so the body itself contains only a few executable snippets rather than examples covering the common cases.

Workflow Clarity

The 11-phase loop (0–10) is clearly sequenced with an explicit per-phase reference, and validation checkpoints are explicit: root cause confirmed only when 'toggling the suspected cause toggles the bug', the fix 'locked by a failing proof', cleanup verified by 'git diff shows only fix + test', and 'four evidence gates before declaring done'. Feedback loops are built in (Oracle Triple 'after 2 consecutive failed rounds', flaky-triage read before Phase 2), matching the anchor for clear sequence with explicit validation steps and feedback loops.

Progressive Disclosure

Scored against the actual bundle: the body is a pure index and every cited path (6 runtimes, 6 tools, 9 methodology files, references/scripts/dap.mjs) exists exactly where linked, one level deep with no orphaned or buried references. Situation-to-file mapping tables (runtime table, specialist-tool table, phase table, cross-cutting table) make navigation trivial, matching the anchor for a clear overview with well-signaled one-level-deep references.

Specificity

The description lists several specific actions — 'Runs a hypothesis-driven debugging loop', 'escalating to orthogonal oracle angles', 'locking the fix with a failing test' — with concrete mechanism (test-locked fix) rather than generic 'helps debug' language. It is not a 5 because 'orthogonal oracle angles' is methodological jargon rather than a plain concrete capability, leaving minor gaps versus the comprehensive anchor.

Completeness

Both halves are explicit: what it does ('Runs a hypothesis-driven debugging loop... locking the fix with a failing test') and when to use it ('Use for crashes, silent failures, hangs, wrong responses, memory leaks, async misbehavior, or reverse engineering') with seven concrete trigger scenarios. This matches the anchor that clearly answers both what AND when with concrete trigger phrases; score 4 would require the 'when' to be less explicit than this enumerated list.

Trigger Term Quality

Natural trigger phrases users would actually say are well covered: 'crashes', 'silent failures', 'hangs', 'memory leaks', 'async misbehavior', 'reverse engineering', plus 'debugging'. Not a 5 because common variations users also say — 'bug', 'error', 'stack trace', 'segfault', 'exception', 'flaky' — are absent.

Distinctiveness Conflict Risk

It carves a clear niche (hypothesis-driven debugging, oracle escalation, regression-test-locked fixes) with distinct triggers that separate it from adjacent skills like code review, testing, or profiling. Only 'wrong responses' is mildly broad, but it is framed within a debugging trigger list, so conflict risk is minimal.