Summary

• Add explicit continuation evidence when cleanup intentionally restarts a stage from offset 0 after changing the candidate set.
• Include a human-readable reason, mutation progress delta, and next command label so the restart does not look like a loop.
• Extend the abandoned cleanup orchestrator smoke test to cover the output contract.

Fixes #826

Tests

• php tests/smoke-abandoned-cleanup-orchestrator.php
• php tests/smoke-cleanup-eligible-drain.php
• php tests/bounded-cleanup-processed-candidates.php
• php tests/cleanup-remaining-work-summary.php
• php tests/workspace-compact-output.php
• php -l inc/Workspace/WorkspaceAbandonedCleanupOrchestrator.php
• php -l tests/smoke-abandoned-cleanup-orchestrator.php

AI assistance

• AI assistance: Yes
• Tool(s): openai/gpt-5.5 via OpenCode
• Used for: Implementing the cleanup continuation output change, updating focused tests, and running verification.