Conciseness

The body is largely lean — every command block earns its place, and the Notes sections explain genuinely non-obvious facts (process chain walking, QWEN_CODE_NO_RELAUNCH rationale, shell-state non-persistence). Two mild over-explanations keep it from a 5: the opening paragraph restates the frontmatter description, and the Step 5 'Common patterns' list (event listener leaks, closure capture, module-level caches) is largely knowledge Claude already has.

Actionability

Guidance is fully executable end to end: copy-paste tmux/npm/env commands, the exact `kill -USR2` snapshot trigger, exact `chrome-devtools` subcommands with documented outputs ('uid, className, count, selfSize, maxRetainedSize'), and clear provenance for each placeholder ('Where `<uid>` is from the `get_memory_snapshot_details` output'). The one bundle script is invoked with a concrete, correct path. This matches 'fully executable; copy-paste ready; covers the common cases'.

Workflow Clarity

The six-step sequence is explicit and well-ordered, with real validation checkpoints (three-snapshot trend confirmation in Step 2, post-fix re-run with 'confirm the leaking class count stabilizes' in Step 6). It is not a 5 because there are no error-recovery feedback loops — nothing tells Claude what to do when the daemon fails to start, a snapshot file doesn't appear, or PID discovery returns the wrong process — which the score-5 anchor requires and the score-4 anchor ('most checkpoints present; minor validation gaps') describes exactly.

Progressive Disclosure

The body is a well-sectioned ~155-line workflow that appropriately keeps procedure content inline, and its one bundle reference (`scripts/find-leaf-node.sh`) is real, correctly pathed, and clearly signaled. It drops from 5 because the closing 'Worked Example' points to `examples/react-reconciler-performance-measure-leak.md`, which does not exist in the bundle (no `examples/` directory) — a dangling one-level reference that fails navigation; the score-3 anchor's 'references present but not clearly signaled' is a worse fit since the signal is clear, just broken.

Specificity

The description names the domain ('memory leaks in the Qwen Code CLI') and the tooling ('heap snapshots and the chrome-devtools CLI'), but offers only one concrete action verb — 'Diagnose'. It does not enumerate what the skill actually does (capture snapshots, compare retained sizes, trace retainer chains), so it matches 'names domain and 1-2 concrete actions, but not comprehensive' rather than the score-4 anchor's list of several specific actions.

Completeness

It explicitly answers both questions: the 'what' ('Diagnose memory leaks in the Qwen Code CLI using heap snapshots and the chrome-devtools CLI') and the 'when' with a concrete trigger clause ('Use when investigating high memory usage, unbounded growth, or suspected object retention issues'). This mirrors the score-5 good example's structure; it is not the score-4 anchor because the 'when' clause is specific and multi-triggered rather than merely serviceable.

Trigger Term Quality

'high memory usage', 'unbounded growth', and 'object retention' are natural phrases a user would say, plus the core 'memory leaks' term. It misses common variations users would actually say, such as 'out of memory' / 'OOM', 'memory consumption', 'RSS keeps growing', or 'heap', so it falls just short of the comprehensive score-5 anchor.

Distinctiveness Conflict Risk

The description is scoped to a narrow niche — memory leaks in one specific CLI with specific tooling — so it would not fire for general performance, profiling, or debugging skills. Clear niche with distinct triggers; minimal conflict risk.