This is a strong skill description that clearly communicates its specific purpose (server-side auth session management with HTTP-only cookies for SSR frameworks), its dependencies (PKCE auth flow), and when to use it via an explicit 'Use when' clause with multiple natural trigger terms. It uses proper third-person voice and is concise without being vague.

Dimension	Reasoning	Score
Specificity	Lists multiple specific concrete actions: 'server-side auth session management', 'HTTP-only cookie synchronization', names specific frameworks (Next.js, SvelteKit), and notes dependency on PKCE auth flow.	3 / 3
Completeness	Clearly answers both 'what' (implements server-side auth session management with HTTP-only cookie synchronization for SSR frameworks) and 'when' (explicit 'Use when' clause listing five specific trigger scenarios).	3 / 3
Trigger Term Quality	Excellent coverage of natural terms users would say: 'SSR authentication', 'server-side session sync', 'HTTP-only auth cookies', 'Next.js Supabase auth', 'SvelteKit Supabase auth' — these are all terms developers would naturally use when seeking this functionality.	3 / 3
Distinctiveness Conflict Risk	Highly distinctive — the combination of server-side auth, HTTP-only cookies, SSR frameworks, Supabase, and PKCE dependency creates a very clear niche that is unlikely to conflict with other skills like general auth or client-side auth skills.	3 / 3
	Total	12 / 12 Passed

Implementation

85%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

This is a strong, well-structured skill that provides clear, executable guidance for implementing SSR auth session management. The phased workflow with explicit HALT conditions and a verification checklist makes it highly reliable. Minor verbosity in explanatory comments (e.g., why getUser over getSession) slightly reduces token efficiency but adds safety-critical context that is arguably justified.

Dimension	Reasoning	Score
Conciseness	Generally efficient with good use of code examples, but includes some unnecessary explanation (e.g., explaining why not to use getSession(), explaining cookie chunking concepts). A few comments could be trimmed, though most content earns its place.	2 / 3
Actionability	Provides fully executable, copy-paste ready code examples for each phase including the shared cookie options, server client creation, middleware, token rotation handling, and route protection. Specific version requirements and concrete commands are given.	3 / 3
Workflow Clarity	Six clearly sequenced phases with explicit validation checkpoints (Phase 6 verification report), HALT conditions on failures (version check, rotation failure, auth failure), and clear error recovery paths (clear cookies and redirect on rotation failure). Feedback loops are present for destructive operations.	3 / 3
Progressive Disclosure	Well-structured with clear pre-conditions referencing dependent skills, a shared constant defined once and referenced throughout, and a one-level-deep reference to the SvelteKit-specific implementation file. Content is appropriately split between the main skill and framework-specific files.	3 / 3
	Total	11 / 12 Passed

Validation

100%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 11 / 11 Passed

Validation for skill structure

No warnings or errors.

Reviewed

3 days ago

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Discovery Implementation Validation