Cartographer
83.0Drops you into an unfamiliar repo and draws the three paths a request can take through it.
Use Lumen Forge to build a tool for developers who are new to a codebase.
Founding Partner challenge. Onboarding onto an unfamiliar codebase is one of the least-served problems in developer tooling. Build something that shortens the first week.
Challenge closed
7 submissions ยท 7 scored
Results
Scored by 3 judges against the standard daily rubric, blended with community votes.
Community choice
CartographerSubmission gallery
Every submission from this challenge, including what shipped and what didn't.
Drops you into an unfamiliar repo and draws the three paths a request can take through it.
Hover any line and see why it was written, reconstructed from commits, PRs, and issues.
A guided five-stop tour of any codebase, generated on the fly.
Explains any config file in a repo by cross-referencing what actually reads it.
Generates a personalized onboarding checklist by diffing your skills against the repo.
Maps where untrusted input enters a codebase, for the new engineer who's about to touch it.
Extracts the domain vocabulary a codebase assumes you already know.
The brief
Judging
The default rubric for daily challenges. Weights are tuned so that a working, honest, well-explained build beats an ambitious broken one.
| OriginalityIs the idea fresh, or a well-worn demo with a new coat of paint? | 15% |
| ExecutionDoes it actually run? How much of the promise is real? | 20% |
| UsefulnessWould a real person use this? Is the problem worth solving? | 15% |
| Technical QualitySound architecture and sensible tradeoffs for a 30-minute build. | 12% |
| Design & UXClarity, polish, and accessibility of the interface. | 12% |
| Effective Use of AIIs AI load-bearing here, or decorative? | 13% |
| Completion in TimeHow much shipped inside the clock, per the disclosure fields. | 8% |
| Demo & PresentationDid the live demo land? Was the process explained well? | 5% |