Mostly efficient numbered steps, but the 'Vulnerability Classes in This Skill' section largely restates the five patterns already in 'Autonomous Testing Priority', and lines like 'Most apps generate a token, email it, and accept it from any browser' and 'no hard RFC mandates the exact value; OWASP recommends...' explain concepts Claude already knows. It is not a 3 because of this redundancy and explanatory padding; not a 1 because the core steps are tight and concrete.

Concrete, copy-paste-ready methodology with specific values ('nonexistent@fakedomain12345.com', 'POST ... 10-20 times rapidly', 'returns 200 or success', 'without a 429, lockout, or CAPTCHA'). Per the instruction-only scoring note, absence of code is not penalized when guidance is this actionable, so it reaches the 'specific examples; copy-paste ready' anchor.

Pattern 1 gives a clear 4-step sequence with explicit confirmation criteria ('enumeration is confirmed when the two responses differ measurably'), and Pattern 3 has a conditional validation gate ('If the second submission returns 200 ... -> token not invalidated'). These explicit proof/checkpoint steps match the 'clear sequence with explicit validation steps' anchor.

This is a focused single-purpose testing skill with no bundle files and no need for external references; content is organized into clear sections ('Autonomous Testing Priority', 'Vulnerability Classes', 'Related Skills') with no nested/deep references. Per the rubric's simple-skill guideline, well-organized sections with no external-reference need score 3.

Lists five concrete, distinct detection patterns ('username enumeration via different responses', 'reset token exposed directly in the API response body', 'reset token not invalidated after use (replay)', 'reset link works from a different IP/browser', 'no rate limit on the reset request endpoint') plus explicit detection actions, matching the 'lists multiple specific concrete actions' anchor.

It thoroughly answers 'what' (5 patterns + detection steps) but lacks an explicit 'Use when...' trigger clause; the 'when' is only implied by the title and detection guidance, so per the rubric guideline a missing explicit trigger caps completeness at 2 rather than 3.

Natural user-facing terms are well covered ('Forgot Password', 'Account Recovery', 'password reset', 'reset token'); a user asking to test forgot-password flows would naturally say these. It is not a 2 because common variations are present rather than missing.

The niche is explicit and clearly carved out from siblings: 'distinct from reset-email host-header poisoning (hunt-host-header)' and 'hunt-ato owns password-reset as an ATO path; prove the primitive here, chain it there' — unlikely to trigger for the wrong skill.