Lean, actionable body that assumes Claude's competence — it does not explain what structs, XOR, or crypto primitives are, and every section earns its tokens with concrete commands and reference data (e.g. the crypto-constants table).

Provides copy-paste-ready executable guidance throughout: ghidra_decompile/batch_rename/retype/set_comment calls, capa and pefile scripts, and grep one-liners with real constants and arguments.

The core 2a–2e loop is explicitly sequenced with a re-read feedback step, an on-task check every 3–5 tool calls, context-rot prevention rules, and a clear completion gate — all with explicit checkpoints.

Internal sections are well-organized, but the skill is a monolithic single file well over 50 lines with no one-level-deep reference files; sizable blocks like the per-question strategies and crypto-constants table could be split out for easier navigation.

Lists multiple concrete actions — 'decompile→rename→retype→comment→re-read', 'identify cryptographic primitives', 'locate C2 protocol', 'recover data structures' — rather than vague language.

Clearly answers both what (depth-first RE investigation loop with named steps) and when ('Use when triage has already identified the interesting area and the goal is full understanding'), with explicit trigger guidance.

Explicit 'Triggers on' clause covers natural phrases users would say: 'deep analysis', 'understand function', 'recover struct', 'crypto identification', 'C2 protocol', 'what does this function do'.

Occupies a clear RE niche and explicitly distinguishes itself from breadth-first triage ('Distinct from breadth-first triage (reverser/triage)'), so it is unlikely to fire for the wrong skill.