I have created the official sprint execution guide at 

SPRINT2_EXECUTION_GUIDE.md
. Below is the required summary of the workflows and exit criteria.

1. Execution Workflow Summary
The Sprint 2 task lifecycle is strictly sequential:

Planning: Review the task requirements, files expected, and confirm parent dependencies are in place.
Prompt: Wait for the Human Approver to issue the explicit execution prompt.
Implementation: Write clean code conforming to the PSR-4 autoloader, native PHP 7.4 specifications, and the frozen kernel guidelines.
Self-Review: Perform linting, check file boundaries, and run security audits.
Implementation Report: Document all changes and present them to the Human Approver.
Human Approval: Review and gain verification from the human developer.
Git Commit: Commit and push the task changes.
Memory: Create the task memory file under .ai/memory/.
Next Task: Wait for the next prompt. No automatic continuation is allowed.
2. Security Workflow Summary
Every AUTH task must verify and enforce these specific security boundaries:

Hashing & Verification: Passwords must be hashed using password_hash() with PASSWORD_BCRYPT and verified using password_verify(). Plain-text credentials must never be exposed or logged.
Session Lifecycle: Regenerate session IDs using Session::regenerate(true) on successful logins and Support Mode entry/exit to block session fixation. On logout, clean $_SESSION, delete session files, and destroy the session cookie.
Timeouts: Calculate and enforce absolute timeouts (8h for admin, 12h for crew, 24h for couple) and universal inactivity timeouts (2h) on every request, redirecting to /login with an expiration message upon failure.
CSRF Validation: Wrap all POST routes in CsrfMiddleware, performing constant-time comparisons with hash_equals().
Output Escaping: Wrap all dynamic display strings in views and layouts inside escape_html().
Cookie Flags: Confirm local session cookies utilize HttpOnly, SameSite=Strict, and Secure (in production) properties.
3. Dependency Workflow Summary
Execution order follows topological architecture requirements rather than numeric order:

Pre-checklist Build Configuration: Resolves TD-006 and TD-007 to allow for local Tailwind asset compilation.
AUTH-001 (Unified Login): Establishes the AuthController, AuthService, AuthModel, and database authentication hooks. Must be completed and committed before any other tasks.
AUTH-002 (Logout) & AUTH-004 (Middleware Guards & Session Timeouts): Can proceed concurrently, but are sequentially completed after AUTH-001.
AUTH-003 (Forgot Password Flow): Executed last, depending on both the persistence hooks from AUTH-001 and the middleware rules from AUTH-004.
4. Completion Workflow Summary
An implementation task is officially marked complete only when:

An Implementation Report is submitted detailing files added, files modified, and test validations.
The Human Approver reviews the code and gives explicit approval.
The code is staged, committed, and pushed cleanly to the git branch.
A corresponding Implementation Memory markdown file is written under .ai/memory/ summarizing architectural lessons learned.
5. Sprint Exit Criteria
Sprint 2 is considered complete and closed when:

All tasks (AUTH-001 through AUTH-004) are finished and verified.
All portal sub-routes (/app/couple/*, /app/crew/*, /app/admin/*) are secured by the middleware pipeline.
The database schema matches PDD v1.0 exactly with zero custom tables or modified columns.
The application kernel in app/core/ remains frozen (except the approved timeout check updates in Session.php).
The Sprint 2 Architecture Review has been written, audited, and accepted.
6. Editorial Improvements Recommended
Config Timeout Verification: Recommend implementing a helper function during Bootstrap::init to verify that environment variables (like SESSION_TIMEOUT_ADMIN) are present and numeric, throwing a clean initialization warning if they are missing or malformed.
Session Cache Purging: Recommend writing a simple utility script to purge expired token payloads under storage/cache/reset_token_*.json regularly, reducing disk pollution over time.
Session Metadata
Task ID: N/A (Sprint 2 Execution Guide Setup)
Summary: Drafted and saved the official Sprint 2 Execution Guide.
Files Created: 

SPRINT2_EXECUTION_GUIDE.md
Files Modified: None
Dependencies: None
Acceptance Criteria: N/A
Security Checklist: N/A
Definition of Done: Execution guide finalized. Ready for Sprint 2 review.