02 / AI Root Cause Analysis
Root Cause Diagnosis & Reasoning
Interactive DemoWhat is Diagnosis? Rather than dumping raw error logs, Debug Vitals calculates the exact root cause behind your failure and explains it in plain English with supporting evidence.
Primary Root Cause Identified
CI is running Node 20, but the agent updated package.json to require Node 22.
The agent modified package.json to require Node >=22 during a dependency audit. This silently broke the CI pipeline which was pinned to node:20-alpine. The build step (esbuild 0.21.5) fails on Node 20, causing all 17 integration tests to report as failures before they can even run.
94%
Confidence
Chronological Causal ChainHow the initial change propagated into a system failure
Agent Action
Agent action
Updated package.json engines.node to >=22
Failure
→
Environment
Environment mismatch
CI node:20-alpine vs local node:22
Failure
→
Dependency
Build step failed
esbuild 0.21.5 incompatible with Node 20
Failure
→
Test Result
17 tests failed
Array.fromAsync() not available on Node 20
Failure
→
CI Pipeline
CI build failed
GitHub Actions job: test — conclusion: failure
Failure
Supporting Evidence & DataSpecific file changes and version logs proving this root cause
Ranked Potential Root CausesTop 3 candidate causes weighted by evidence
#1
package.json engines.node set to >=22 while CI image is node:20-alpine.
94% Probability
#2
esbuild 0.21.5 dropped Node 18/20 support; build step fails on CI.
61% Probability
#3
17 test files use Array.fromAsync() — available in Node 22, not 20.
28% Probability
Affected System ComponentsFiles and services impacted by this issue
CI/CD pipelineIntegration tests (17)Build step (esbuild)package.json
💡 Recommended Action
Update .github/workflows/ci.yml to use node:22-alpine, or revert package.json engines.node to >=20.