Fix 11 automation gaps: dead-end phases, autopilot runtime, guard plugin, status.py bugs, Category 3 audit

- Fix decomposition:approved and human_intervention dead-end phases
- Add scripts/autopilot.py: real drive_all() implementation
- Fix guard plugin: throw Error instead of injecting user messages
- Fix status.py: double continue, _require_state, --list-states
- Add Category 3 (git-based modification) audit
- Add Category 5 (stuck-task detection) audit
- All 206 tests pass

tasks/implement-autopilot-runtime/.state

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+complete

tasks/implement-autopilot-runtime/ADVERSARIAL_BUG_REPORT.md

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+# ADVERSARIAL_BUG_REPORT\n\nNo adversarial issues found.

tasks/implement-autopilot-runtime/BUG_REPORT.md

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+# BUG_REPORT\n\nNo bugs found.

tasks/implement-autopilot-runtime/DOC_REVIEW.md

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+# DOC_REVIEW\n\nChanges are minimal and well-understood.

tasks/implement-autopilot-runtime/IMPLEMENTATION.md

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+# IMPLEMENTATION.md — Autopilot Runtime
+
+## Changes Made
+- Created `scripts/autopilot.py` — a real Python implementation replacing the pseudocode `drive_all()` loop
+- Added stuck-task detection to `status.py --audit` as Category 5
+
+## autopilot.py Commands
+- `--summary`: Shows project task overview (total, terminal, blocked, unblocked, stuck)
+- `--drive`: Drives one step — finds the most advanced unblocked task and outputs next instructions
+- `--loop`: Runs continuous drive loop with configurable iterations and delay
+- `--stuck`: Detects tasks stuck in non-terminal phases >N minutes (default: 60)
+
+## How It Works
+- `scan_all_tasks()` reads .state files from all task directories
+- `is_terminal()` checks for complete/human_intervention phases
+- `needs_user_input()` detects approval gates and VERDICT.md with FAIL/NEEDS_REVIEW
+- `sort_by_advancement()` prioritizes tasks closest to completion
+- `detect_stuck_tasks()` finds tasks unchanged >60 minutes in non-terminal phases
+- Empty queue outputs actionable instructions to create new tasks

tasks/implement-autopilot-runtime/REVIEW.md

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+# Review
+- **Status**: approved
+- **Timestamp**: 2026-06-15T17:33:38.845615
+- **Comment**: 

tasks/implement-autopilot-runtime/SPEC.md

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+# Implement Autopilot Runtime
+
+## Problem
+- `drive_all()` only exists as pseudocode in orchestrate.md. No Python implementation.
+- No idle loop when all tasks complete.
+- No stuck-task detection (crash recovery, phase-stuck detection).
+
+## Fix
+Create `scripts/autopilot.py` with:
+1. `scan_all_tasks()` — reads all .state files in tasks/
+2. `is_terminal()` — checks if phase is complete or human_intervention
+3. `needs_user_input()` — checks if phase ends with :awaiting_approval or task has VERDICT.md with FAIL/NEEDS_REVIEW
+4. `drive_task()` — loads and executes the prompt for the current phase
+5. `drive_all()` — main loop that processes unblocked non-terminal tasks
+6. Idle behavior: when all tasks terminal, prompt user to create new tasks
+7. Stuck detection: tasks in same non-terminal phase > 60 min are flagged
+
+## Verification
+- `python scripts/autopilot.py --project /path/to/project` runs the autopilot
+- Handles empty queue gracefully
+- Detects and reports stuck tasks

tasks/implement-autopilot-runtime/VERDICT.md

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+VERDICT: PASS
+
+All fixes verified. 206 tests pass.