🏥 CI Failure Investigation - Run #17359897066: JavaScript Dependency Error in GitHub Actions Workflow

[github-actions]

🏥 CI Failure Investigation - Run #17359897066

Summary

Daily Test Coverage Improver workflow failed due to missing @actions/core JavaScript module during log parsing step, despite the main workflow functionality completing successfully.

Failure Details

• Run: 17359897066
• Commit: 05b3fce
• Trigger: workflow_dispatch
• Workflow: Daily Test Coverage Improver
• Failed Step: "Parse agent logs for step summary" (Step 16)
• Duration: 14m 10s total runtime

Root Cause Analysis

Primary Issue: JavaScript dependency resolution failure in GitHub Actions runtime environment.

Specific Error:

Error: Cannot find module '@actions/core'
Require stack:
- /home/runner/work/_actions/actions/github-script/v7/dist/index.js

Critical Context: The workflow functionally succeeded - all core tasks completed successfully:

• ✅ JsonRuntime module test coverage implementation (53 new tests)
• ✅ All 2,462 tests passing (zero regressions)
• ✅ Pull Request Daily Test Coverage Improver: Comprehensive JsonRuntime test coverage (0% → comprehensive coverage) #1567 created successfully
• ✅ Research issue Daily Test Coverage Improver: Research and Plan #1557 updated properly

The failure occurred only in the post-processing log parsing step, not in the core functionality.

Failed Jobs and Errors

Job: daily-test-coverage-improver (49278477912)

• Overall Status: FAILURE ❌ (due to step 16 only)
• Core Functionality: SUCCESS ✅ (steps 1-15 completed perfectly)
• Failed Step: Step 16 "Parse agent logs for step summary"
• Error Context: actions/github-script@v7 cannot import @actions/core module

JavaScript Runtime Error Details:

at Module._resolveFilename (node:internal/modules/cjs/loader:1212:15)
at resolve (node:internal/modules/helpers:193:19)
at Object.apply (/home/runner/work/_actions/actions/github-script/v7/dist/index.js:35469:43)
at main (eval at callAsyncFunction (...), <anonymous>:5:16)

Investigation Findings

Workflow Success Context

The actual Daily Test Coverage Improver completed successfully:

• Test Implementation: 53 comprehensive JsonRuntime tests added
• Build Status: All builds passed
• Test Results: 2,409 → 2,462 tests (53 new, all passing)
• Pull Request: Created PR Daily Test Coverage Improver: Comprehensive JsonRuntime test coverage (0% → comprehensive coverage) #1567 with detailed test coverage improvements
• Research Updates: Updated issue Daily Test Coverage Improver: Research and Plan #1557 with completion status

Technical Analysis

The failure is in the log summarization infrastructure, not the core workflow:

1. Working Components: Claude Code execution, file operations, git operations, GitHub API calls
2. Failing Component: Post-processing JavaScript action for log parsing
3. Missing Dependency: @actions/core npm package not available in runner environment
4. Action Version: actions/github-script@v7 attempting to require missing module

Environment Context

• Runner: ubuntu-latest (GitHub-hosted)
• Node.js: Version embedded in github-script action
• Missing Module: @actions/core - core GitHub Actions toolkit library
• Script Context: Attempting to parse Claude Code execution logs for step summary

Recommended Actions

Immediate Fix ⚡ HIGH PRIORITY

1. Fix GitHub Script Dependency

   # In .github/workflows/daily-test-improver.lock.yml
   - name: Parse agent logs for step summary
     uses: actions/github-script@v7
     with:
       script: |
         // Add explicit import with error handling
         try {
           const core = require('@actions/core');
           // ... rest of script
         } catch (error) {
           console.log('Warning: @actions/core not available, skipping summary');
           console.log('Core workflow completed successfully');
           return;
         }

2. Alternative: Use Different Action

   # Replace github-script with actions/core-compatible action
   - name: Parse agent logs for step summary  
     uses: actions/setup-node@v4
     with:
       node-version: '20'
   - run: |
       npm install @actions/core
       node .github/scripts/parse-logs.js

3. Fallback: Skip Log Parsing

   # Make the step non-critical
   - name: Parse agent logs for step summary
     continue-on-error: true
     uses: actions/github-script@v7

Root Cause Resolution

1. Dependency Management: Ensure @actions/core is available in runner environment
2. Action Version: Consider upgrading to newer github-script version or using different approach
3. Error Handling: Add proper error handling for missing dependencies
4. Testing: Test workflow changes in a fork before merging

Verification Steps

# 1. Test the workflow locally or in fork
gh workflow run daily-test-improver.lock.yml

# 2. Verify all steps complete including log parsing
# Monitor: https://github.com/fsprojects/FSharp.Data/actions

# 3. Confirm core functionality still works regardless of log parsing

Prevention Strategies

Short-term

• Graceful Degradation: Make log parsing step non-critical with continue-on-error: true
• Dependency Pinning: Pin specific versions of actions with known working dependencies
• Error Boundaries: Wrap all JavaScript operations in try-catch blocks

Long-term

• Self-Contained Scripts: Move complex JavaScript to separate files with explicit dependencies
• Alternative Libraries: Use lightweight alternatives to @actions/core for non-critical features
• Workflow Testing: Add CI workflow validation to catch dependency issues early

AI Team Self-Improvement

Additional prompting instructions for AI coding agents:

### GitHub Actions Workflow Development
1. **Always check action dependencies** - verify required npm modules are available in action runtime
2. **Use continue-on-error: true** for non-critical post-processing steps
3. **Test JavaScript actions locally** before committing to workflow files
4. **Prefer built-in GitHub Actions** over custom JavaScript when possible
5. **Add error handling** for all require() statements in github-script actions
6. **Consider action versioning** - newer versions may have different dependency requirements
7. **Separate core functionality from reporting** - ensure main workflow succeeds even if logging fails

### Debugging Workflow Failures
8. **Distinguish functional vs cosmetic failures** - core success vs. reporting/logging issues
9. **Check module resolution errors** - often indicate action version mismatches
10. **Use artifacts and outputs** as alternatives to complex JavaScript log processing

Historical Context

Pattern Recognition: This is a Dependency/Configuration Issue - a new type of failure not previously seen in this repository:

• First Instance: No similar @actions/core dependency errors found in issue history
• Workflow Age: The daily-test-improver workflow is relatively new infrastructure
• Action Ecosystem: GitHub Actions dependency ecosystem can have runtime environment variations
• Impact Scope: Cosmetic failure only - core functionality completed successfully

Similar Patterns: While no identical issues exist, the repository has seen other workflow-related issues:

• Issue 🏥 CI Failure Investigation - Run #17346237870: Code Formatting Check Failed #1544: Code formatting check failures
• Issue 🏥 CI Failure Investigation: Windows Documentation Build Fails Due to Missing Benchmark Project #1541: Documentation generation with missing projects
• Issue 🏥 CI Failure Investigation - Windows path handling bug in IO module tests #1555: Windows-specific CI failures

Resolution Track Record: The maintainers have consistently resolved workflow issues promptly with targeted fixes.

Impact Assessment

• Severity: Low-Medium - Workflow appears to fail but core functionality succeeded
• Scope: Limited to log parsing/reporting, no functional impact
• User Impact: None - Pull Request Daily Test Coverage Improver: Comprehensive JsonRuntime test coverage (0% → comprehensive coverage) #1567 was created successfully with comprehensive test improvements
• Development Impact: May cause confusion about workflow "failure" when core tasks succeeded
• Urgency: Medium - Should be fixed to avoid false failure notifications

Functional Success Confirmation

✅ IMPORTANT: Despite the CI "failure", the workflow achieved its objectives:

• Test Coverage: Successfully added 53 JsonRuntime tests (0% → comprehensive coverage)
• Quality: All 2,462 tests pass with zero regressions
• Integration: Pull Request Daily Test Coverage Improver: Comprehensive JsonRuntime test coverage (0% → comprehensive coverage) #1567 created and ready for review
• Documentation: Research issue Daily Test Coverage Improver: Research and Plan #1557 properly updated
• Build: All compilation and formatting checks passed

The "failure" is purely in the post-processing summary generation, not the core functionality.

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[github-actions]

🔄 Duplicate Failure Detected - Run #17359895446

Additional Instance: Daily Perf Improver Run #17359895446

This is identical to the issue described above, but occurring in the Daily Perf Improver workflow instead of the Daily Test Coverage Improver:

Key Details

• Run: 17359895446
• Workflow: Daily Perf Improver (vs. Daily Test Coverage Improver)
• Same Error: Cannot find module '@actions/core' in step 16 "Parse agent logs for step summary"
• Same Context: Core functionality succeeded ✅, failure only in post-processing

Functional Success (Despite CI "Failure")

✅ Daily Perf Improver Core Tasks Completed Successfully:

• Fixed critical benchmark infrastructure issues
• JsonConversionBenchmarks.AccessProperties: Fixed crash due to incorrect JSON structure assumptions
• Twitter JSON benchmarks: Fixed invalid JSON Lines format → proper JSON array
• All 7 benchmarks now functional: ParseTwitterJson and ToStringTwitterJson went from NA (failing) to working
• Pull Request Created: #1569 - Daily Perf Improver: Fix broken benchmarks
• All tests pass, build succeeds

Pattern Confirmation

This confirms the issue is systemic across multiple daily improver workflows that use the same log parsing infrastructure:

1. ✅ Daily Test Coverage Improver - Run #17359897066 (original report)
2. ✅ Daily Perf Improver - Run #17359895446 (this instance)
3. 🔍 Likely affects other improver workflows using similar log parsing

Recommended Priority

⬆️ ELEVATED PRIORITY: Since this affects multiple workflow types, the fix should target the shared log parsing step used across all daily improver workflows.

The recommended solutions in the original issue apply to all affected workflows, not just the test coverage improver.

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[github-actions]

🔄 Duplicate Failure Detected - Run #17360020510

Status: DUPLICATE - Same @actions/core dependency error occurred again

Failure Details

• Run: 17360020510
• Commit: 56c3ab7
• Trigger: workflow_dispatch
• Date: 2025-08-31T17:06:43Z
• Same Error: Error: Cannot find module '@actions/core' in step 16 "Parse agent logs for step summary"

✅ Core Functionality Status

IMPORTANT: Like the previous failure, the core workflow succeeded completely:

• ✅ Daily Test Coverage Improver executed successfully (10+ minutes)
• ✅ All artifacts uploaded properly (workflow-complete.txt, agent_outputs, logs)
• ✅ Claude Code execution completed with success result
• ✅ Total cost: $6.70 for comprehensive test coverage work

🔍 Identical Error Pattern

Error: Cannot find module '@actions/core'
Require stack:
- /home/runner/work/_actions/actions/github-script/v7/dist/index.js

This confirms the pattern identified in the original investigation - the issue is consistently reproducible and affects only the post-processing log parsing step.

📊 Impact Assessment

• Functional Impact: ZERO - Core Daily Test Coverage Improver works perfectly
• Cosmetic Impact: HIGH - Causes misleading "failure" status in GitHub Actions UI
• User Confusion: MEDIUM - May cause concern about workflow reliability

🔧 Urgency Level: MEDIUM-HIGH

Recommendation: This should be prioritized for fix since it's now a recurring pattern that creates false failure notifications for successful workflows.

The recommended solutions from the original issue remain valid:

1. Add continue-on-error: true to the problematic step (quick fix)
2. Fix the @actions/core dependency resolution (permanent fix)
3. Replace actions/github-script@v7 with a more reliable alternative (robust fix)

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[github-actions]

🔄 Duplicate Failure Confirmed - Run #17360070115

Investigation Summary

This is a confirmed duplicate of the same @actions/core dependency issue that occurred in the previous run.

Current Run Details

• Run: 17360070115
• Date: 2025-08-31 17:40:37 UTC
• Commit: cb1d4610954eca654abef15ef004954a877741de ("update agentics")
• Duration: 29 minutes
• Status: Same exact failure pattern

Identical Error Pattern

Error: Cannot find module '@actions/core'
Require stack:
- /home/runner/work/_actions/actions/github-script/v7/dist/index.js

Failed Step: Step 16 "Parse agent logs for step summary" (line 433 in workflow)

Functional Success Confirmation ✅

IMPORTANT: Like the previous run, this workflow functionally succeeded:

• Task Completion: Daily Test Coverage Improver completed successfully
• Test Implementation: Added 15 comprehensive tests for ActivePatterns, ReflectionHelpers, and ProviderHelpers modules
• Coverage Improvements:
  • ActivePatterns module: 0% → 71.4% line coverage
  • ReflectionHelpers module: 0% → 100% line coverage
  • ProviderHelpers module: 0% → 1.3% line coverage
• Quality: All tests pass, no regressions
• Files Created: tests/FSharp.Data.DesignTime.Tests/Helpers.fs (177 lines of comprehensive tests)
• Branch Ready: daily-test-coverage-improver-helpers branch with commits ready for PR

Key Evidence from Logs

The agent execution completed successfully with detailed reporting:

"result": "## Daily Test Coverage Improver - Workflow Complete! ✅\n\nI have successfully completed the **Daily Test Coverage Improver** workflow..."
"total_cost_usd": 11.528816099999997
"num_turns": 204
"duration_ms": 979460

Pattern Confirmation

This confirms the analysis from the original issue:

1. Root Cause: JavaScript dependency resolution failure in actions/github-script@v7
2. Impact Scope: Post-processing only, core functionality unaffected
3. Frequency: Recurring issue - affects multiple Daily Test Coverage Improver runs
4. Urgency: Should be fixed to prevent false failure notifications

Recommended Action

The fix recommendations from the original issue remain valid. The workflow should be updated to:

1. Add error handling for the missing @actions/core module
2. Make the log parsing step non-critical with continue-on-error: true
3. Or replace the github-script action with a more robust solution

This recurring pattern confirms this is a systematic infrastructure issue that needs addressing in the workflow configuration.

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[github-actions]

🔄 Duplicate Failure Confirmed - Run #73

Another instance of the same @actions/core dependency issue has occurred:

• Run: 17360067870
• Workflow: Daily Perf Improver (vs Daily Test Coverage Improver)
• Date: 2025-08-31T17:11:19Z
• Status: Same exact error in step 16 "Parse agent logs for step summary"

Key Findings

✅ Core Functionality Succeeded

Despite the "failure" status, the Daily Perf Improver workflow completed successfully:

• CSV Performance Optimization: Implemented ResizeArray replacement for List to eliminate O(n) reversal overhead
• Benchmarking Infrastructure: Created comprehensive CSV benchmarks in tests/FSharp.Data.Benchmarks/CsvBenchmarks.fs
• Quality Assurance: All builds passed, code formatting successful, zero breaking changes
• Issue Created: Daily Perf Improver: CSV parsing performance optimization ready for review #1571 "Daily Perf Improver: CSV parsing performance optimization ready for review"

🔁 Pattern Confirmation

This confirms the pattern identified in your investigation:

• Same Error: Cannot find module '@actions/core' in github-script@v7
• Same Step: Step 16 log parsing failure
• Same Impact: Cosmetic failure only, core functionality succeeds
• Same Workflow Structure: Multiple daily improver workflows affected

📊 Frequency Analysis

• Two instances in one day (Daily Test Coverage + Daily Perf Improver)
• Same root cause: Missing @actions/core dependency in GitHub Actions runner
• Consistent pattern: Post-processing failure after successful core execution

Recommendation

Since this is affecting multiple daily improver workflows, the fix should be applied to all of them:

1. Immediate: Apply continue-on-error: true to step 16 in both workflows
2. Root Fix: Either fix the dependency issue or implement the fallback script approach you outlined
3. Monitoring: Track if other daily improver workflows (if any) are also affected

This duplicate occurrence strengthens the case for high priority resolution, as it's now affecting multiple automated workflows daily.

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