Stop Repeating the Same Bugs
DejaBug prevents regressions by learning from every bug fix and alerts you before you merge similar mistakes again. AI-powered regression detection right in your PRs.
DejaBug Regression Alert
Similar to PM-2023-09-12: "UI freeze caused by heavy work on main thread."
Detected pattern:
• File: CheckoutViewModel
• Usage of heavy computation inside
viewModelScope.launch(Dispatchers.Main)
Suggestion: Move heavy work to IO dispatcher as recommended in PM-2023-09-12.
Engineering Teams Keep Repeating the Same Mistakes
40% of bugs are similar to previous incidents
Teams waste 100+ hours fixing the same issues
Postmortems get written but never referenced
Knowledge disappears when engineers leave
Manual code reviews miss subtle patterns
Regressions slip into production
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We Learn From Every Bug Fix
When you merge a bug fix, we automatically generate a postmortem for future matching.
POST-MORTEM: PM-2024-01-15
Issue: Memory leak in WebSocket connection
Root Cause: Connection not properly closed...
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Potential Regression Detected
This code pattern matches PM-2024-01-15
See It In Action
Real regression alert from DejaBug on a GitHub Pull Request
DejaBug Alert: High Risk of Regression
This PR is 87% similar to bug #342 from 3 months ago:
"App crash when loading large datasets in background"
Detected Issues:
- ⚠️Heavy computation on main thread (line 47 in
DataProcessor.kt) - ⚠️No error handling for network failures (line 89)
- ⚠️Missing null check (line 102)
What happened last time:
Root cause: Background task blocked UI thread
Impact: 2,400 users affected, 4.2★ avg rating drop
Fix time: 3 hours emergency hotfix
Recommended Actions:
- ✓Move computation to
Dispatchers.IO(see example) - ✓Add try-catch for
NetworkException - ✓Add null safety check for
user.profile - 📖Review full postmortem: /postmortems/PM-342.md
Powerful Features That Work Together
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Real-time Regression Alerts
Get instant notifications in PRs when code is similar to past bugs. Includes risk scores, affected files, and actionable fixes.
Automatic Postmortems
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Pattern Recognition
AI identifies recurring issues across your entire repository history using vector embeddings and semantic search.
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