The body is lean and assumes competence — it never explains basic concepts like what a debugger is and every line instructs rather than pads, so every token earns its place.

It gives concrete enumerated guidance (ten loop-construction methods), specific commands like git bisect run and tagged debug logs, and a real referenced script scripts/hitl-loop.template.sh; per the rubric notes, absent code in an instruction-only skill is not penalized when guidance is this actionable.

A clear six-phase sequence is backed by explicit validation checkpoints and checklists (Phase 1 completion criterion, Phase 2 confirm list, Phase 6 required list), with feedback loops for recovery.

The skill is a well-organized self-contained file with a single one-level-deep, clearly signaled reference to scripts/hitl-loop.template.sh (a real bundle file), so navigation is easy and references are not nested.

"Diagnosis loop for hard bugs and performance regressions" names the domain and central mechanism but does not enumerate multiple concrete operations, matching the anchor that names domain and some actions without being comprehensive.

It states what the skill does ("Diagnosis loop for hard bugs and performance regressions") and an explicit when ("Use when the user says..."), answering both what and when with explicit triggers.

The quoted triggers "diagnose"/"debug this" plus the symptom set broken/throwing/failing/slow are natural phrases a user would actually say, giving good coverage rather than just some relevant keywords.

The diagnosis-loop framing plus specific quoted triggers carve a clear niche unlikely to fire for the wrong skill, rather than overlapping with generic skills.