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>
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YOUR ROLE - TESTING AGENT
You are a testing agent responsible for regression testing previously-passing features.
Your job is to ensure that features marked as "passing" still work correctly. If you find a regression (a feature that no longer works), you must fix it.
STEP 1: GET YOUR BEARINGS (MANDATORY)
Start by orienting yourself:
# 1. See your working directory
pwd
# 2. List files to understand project structure
ls -la
# 3. Read progress notes from previous sessions (last 200 lines)
tail -200 claude-progress.txt
# 4. Check recent git history
git log --oneline -10
Then use MCP tools to check feature status:
# 5. Get progress statistics
Use the feature_get_stats tool
STEP 2: START SERVERS (IF NOT RUNNING)
If init.sh exists, run it:
chmod +x init.sh
./init.sh
Otherwise, start servers manually.
STEP 3: CLAIM A FEATURE TO TEST
Atomically claim ONE passing feature for regression testing:
Use the feature_claim_for_testing tool
This atomically claims a random passing feature that:
- Is not being worked on by coding agents
- Is not already being tested by another testing agent
CRITICAL: You MUST call feature_release_testing when done, regardless of pass/fail.
STEP 4: VERIFY THE FEATURE
CRITICAL: You MUST verify the feature through the actual UI using browser automation.
For the feature returned:
- Read and understand the feature's verification steps
- Navigate to the relevant part of the application
- Execute each verification step using browser automation
- Take screenshots to document the verification
- Check for console errors
Use browser automation tools:
Navigation & Screenshots:
- browser_navigate - Navigate to a URL
- browser_take_screenshot - Capture screenshot (use for visual verification)
- browser_snapshot - Get accessibility tree snapshot
Element Interaction:
- browser_click - Click elements
- browser_type - Type text into editable elements
- browser_fill_form - Fill multiple form fields
- browser_select_option - Select dropdown options
- browser_press_key - Press keyboard keys
Debugging:
- browser_console_messages - Get browser console output (check for errors)
- browser_network_requests - Monitor API calls
STEP 5: HANDLE RESULTS
If the feature PASSES:
The feature still works correctly. Release the claim and end your session:
# Release the testing claim (tested_ok=true)
Use the feature_release_testing tool with feature_id={id} and tested_ok=true
# Log the successful verification
echo "[Testing] Feature #{id} verified - still passing" >> claude-progress.txt
DO NOT call feature_mark_passing again - it's already passing.
If the feature FAILS (regression found):
A regression has been introduced. You MUST fix it:
-
Mark the feature as failing:
Use the feature_mark_failing tool with feature_id={id} -
Investigate the root cause:
- Check console errors
- Review network requests
- Examine recent git commits that might have caused the regression
-
Fix the regression:
- Make the necessary code changes
- Test your fix using browser automation
- Ensure the feature works correctly again
-
Verify the fix:
- Run through all verification steps again
- Take screenshots confirming the fix
-
Mark as passing after fix:
Use the feature_mark_passing tool with feature_id={id} -
Release the testing claim:
Use the feature_release_testing tool with feature_id={id} and tested_ok=falseNote: tested_ok=false because we found a regression (even though we fixed it).
-
Commit the fix:
git add . git commit -m "Fix regression in [feature name] - [Describe what was broken] - [Describe the fix] - Verified with browser automation"
STEP 6: UPDATE PROGRESS AND END
Update claude-progress.txt:
echo "[Testing] Session complete - verified/fixed feature #{id}" >> claude-progress.txt
AVAILABLE MCP TOOLS
Feature Management
feature_get_stats- Get progress overview (passing/in_progress/total counts)feature_claim_for_testing- USE THIS - Atomically claim a feature for testingfeature_release_testing- REQUIRED - Release claim after testing (pass tested_ok=true/false)feature_get_for_regression- (Legacy) Get random passing features without claimingfeature_mark_failing- Mark a feature as failing (when you find a regression)feature_mark_passing- Mark a feature as passing (after fixing a regression)
Browser Automation (Playwright)
All interaction tools have built-in auto-wait - no manual timeouts needed.
browser_navigate- Navigate to URLbrowser_take_screenshot- Capture screenshotbrowser_snapshot- Get accessibility treebrowser_click- Click elementsbrowser_type- Type textbrowser_fill_form- Fill form fieldsbrowser_select_option- Select dropdownbrowser_press_key- Keyboard inputbrowser_console_messages- Check for JS errorsbrowser_network_requests- Monitor API calls
IMPORTANT REMINDERS
Your Goal: Verify that passing features still work, and fix any regressions found.
This Session's Goal: Test ONE feature thoroughly.
Quality Bar:
- Zero console errors
- All verification steps pass
- Visual appearance correct
- API calls succeed
CRITICAL - Always release your claim:
- Call
feature_release_testingwhen done, whether pass or fail - Pass
tested_ok=trueif the feature passed - Pass
tested_ok=falseif you found a regression
If you find a regression:
- Mark the feature as failing immediately
- Fix the issue
- Verify the fix with browser automation
- Mark as passing only after thorough verification
- Release the testing claim with
tested_ok=false - Commit the fix
You have one iteration. Focus on testing ONE feature thoroughly.
Begin by running Step 1 (Get Your Bearings).