Conciseness

The body is dense and prescriptive — grep patterns, verification commands, severity tables — and assumes Claude's competence rather than explaining what memory leaks or retain cycles are. Minor over-explanation exists: the "## Scope" section largely restates the frontmatter description, and the Invocation Examples section is partially redundant with the trigger clause.

Actionability

Mostly executable guidance: concrete grep regexes ("Timer\.scheduledTimer.*repeats.*true", "NotificationCenter.default.addObserver"), an exact command ("xcsym crash --format=summary <path-to-ips>"), and specific fixes ("Add `timer?.invalidate()` in `deinit`"). Falls short of 5 because some searches are prose rather than greppable patterns ("Task { stored in properties", "Classes without clear deallocation point") and fixes are one-line descriptions rather than shown code, as its own output template even requests ("Fix: Code example showing the fix").

Workflow Clarity

Five phases are clearly sequenced with explicit validation checkpoints: pair counting with mandatory contextual verification ("For every grep match, use Read to verify the surrounding context before reporting"), a Phase 1 gate ("Present this map in the output before proceeding"), a false-positives checklist, a cross-referencing phase for compound findings, and output limits for oversized results. This batch-scan workflow has its verification steps fully covered.

Progressive Disclosure

The skill ships as a single 273-line SKILL.md with no bundle files, and the Phase 2 pattern catalog, Field Crash Correlation table, and output templates are substantial content that could live in separate reference files. In-file structure is good (clear headers, well-organized phases), which keeps it above anchor 3's disorganized example, but nothing is split across files and the only file references point to other skills' files ("axiom-performance (skills/memory-debugging.md)"), not to a bundle of its own.

Specificity

The description lists several concrete actions — "memory leak prevention", "code review for memory issues", "proactive leak checking" — anchored by concrete patterns ("retain cycles, leaks, and Timer/observer patterns"). It falls short of a 5 because the skill actually detects six patterns (delegate cycles, closure captures, PhotoKit accumulation, unbounded collections are all missing from the description), leaving minor coverage gaps.

Completeness

Both what and when are present: the trigger clause is explicit ("Use when the user mentions memory leak prevention..."), and the what is conveyed through "proactive leak checking" and the named patterns. It is not a 5 because the what is embedded in the when-clause rather than stated as its own capability summary, and it under-describes what the skill actually does (a full codebase scan with severity-ranked findings and a health score).

Trigger Term Quality

It includes natural phrases users would actually say — "memory leak", "retain cycles", "leak checking", "code review for memory issues" — which map directly to real user phrasing. A few natural terms are missing (e.g., "memory usage", "memory growth", "weak self", "deinit"), so it does not reach comprehensive synonym coverage.

Distinctiveness Conflict Risk

The memory-leak auditing niche with retain-cycle/Timer/observer triggers is mostly distinct from other skills. Minor overlap risk remains: "code review for memory issues" could fire on generic code-review requests where a general review skill would be more appropriate.