The body is predominantly lean executable code, tables, and concise security rationale (severity guidance and default-justifications) with no basic-concept padding; every section earns its place, fitting the score-3 'lean and efficient' anchor over the score-2 'could be tightened' case.

Each step ships concrete, copy-paste-ready Python test patterns with specific endpoints, assertions, and status codes (e.g. asserting Set-Cookie attributes, 401 on replay, CSRF 403/419), meeting the score-3 'fully executable, copy-paste ready' anchor rather than the score-2 pseudocode case.

A clear 8-step sequence culminates in a Step 8 end-to-end checklist, with per-step failure/severity checkpoints ('If the test fails ... mark critical'); because test authoring is not a destructive/batch operation, the cap-at-2 rule does not apply, so it reaches the score-3 checklist anchor.

Core patterns stay inline while extended patterns (concurrent sessions, logout-all-devices, session binding, anti-patterns) are clearly signaled to references/session-test-patterns.md — a verified, one-level-deep reference structure matching the score-3 anchor rather than the score-2 'not clearly signaled' case.

Lists multiple concrete actions — 'cookie attribute coverage (Secure / HttpOnly / SameSite=Strict|Lax), session-fixation defense (regenerate session ID on login), absolute + idle timeout, concurrent-session limits, logout invalidation across devices, CSRF token handling, session-binding' — matching the score-3 anchor rather than the vague score-2 'names domain and some actions'.

Explicitly answers 'what' (Build-an-X for session-management tests with enumerated coverage) and 'when' ('Use when authoring tests for any web app's session layer'), satisfying the both-what-and-when score-3 anchor rather than the score-2 'when only implied'.

Includes natural terms users would say ('session management tests', 'session layer', 'login / logout') plus concrete framework names (Express, Django, Spring Security, ASP.NET, Rails); the OWASP ASVS V3 jargon is offset by strong natural-phrase coverage, so it clears the score-3 bar over the partial score-2 case.

A clear niche (session-management testing) with distinct triggers, and adjacent concerns are explicitly deferred to companion skills (oauth-flow-test-author, IdP skills); written in third person with no first/second-person voice penalty.