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357083dbae
Major refactoring of the parallel orchestrator to run regression testing agents independently from coding agents. This improves system reliability and provides better control over testing behavior. Key changes: Database & MCP Layer: - Add testing_in_progress and last_tested_at columns to Feature model - Add feature_claim_for_testing() for atomic test claim with retry - Add feature_release_testing() to release claims after testing - Refactor claim functions to iterative loops (no recursion) - Add OperationalError retry handling for transient DB errors - Reduce MAX_CLAIM_RETRIES from 10 to 5 Orchestrator: - Decouple testing agent lifecycle from coding agents - Add _maintain_testing_agents() for continuous testing maintenance - Fix TOCTOU race in _spawn_testing_agent() - hold lock during spawn - Add _cleanup_stale_testing_locks() with 30-min timeout - Fix log ordering - start_session() before stale flag cleanup - Add stale testing_in_progress cleanup on startup Dead Code Removal: - Remove count_testing_in_concurrency from entire stack (12+ files) - Remove ineffective with_for_update() from features router API & UI: - Pass testing_agent_ratio via CLI to orchestrator - Update testing prompt template to use new claim/release tools - Rename UI label to "Regression Agents" with clearer description - Add process_utils.py for cross-platform process tree management Testing agents now: - Run continuously as long as passing features exist - Can re-test features multiple times to catch regressions - Are controlled by fixed count (0-3) via testing_agent_ratio setting - Have atomic claiming to prevent concurrent testing of same feature Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>