Unlocked
First hackathon
ShellHacks 2026
CaffeineDriven.
We're three college students who build at hackathons together. At ShellHacks 2026 we built Repro in 36 hours, and it won the Microsoft prize.
Alexander, Adrian & Brandon
The Repro pipeline: Ingest, Detect, Reproduce, Diagnose, Repair, Verify.
(01) The proofDevpost ↗
Winner. Microsoft prize, ShellHacks 2026.
Repro reproduces every scanner warning in a sandbox and fixes only what it proves. A person merges.
- Build time
- 36hBuilt in 36 hours at ShellHacks 2026.
- Tokens to find bugs
- 0%of model tokens spent finding bugs. Detection is deterministic.
- Tokens to fix bugs
- ~68%*fewer tokens to fix them than repairing every finding separately. *An estimate.
(02) Featured workAll work
Team project · ShellHacks 2026
Repro
Proof, not promises. Repro reproduces every scanner warning in a sandbox and fixes only what it proves; a person merges.
- 01Ingest
Clones the target into a fresh workspace, pinned to one commit.
- 02Detect
Deterministic scanners; no model decides what counts as a finding.
- 03Reproduce
Re-runs each finding's reproduction command in a sandbox, keeps only what shows the problem.
- 04Diagnose
Groups findings by root cause, proposes a fix per group.
- 05Repair
Edits files through sandboxed tools; the diff comes from git.
- 06Verify
Tests + reproduction re-run, an adversarial check tries to break the fix; a person decides whether to merge.
(04) The teamMeet the team
Three students. One team.
(05) Achievement wallAll achievements
Unlocked. And next.
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First prize
Microsoft prize · ShellHacks 2026
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Built in 36 hours
Repro at ShellHacks 2026
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Repos combined
Original (non-fork) public repos across the three of us
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Languages shipped
Primary languages across those repos
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Contributions, last year
Combined GitHub contribution calendars
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Repro stars
Stars on Bomoga/repro
Locked · goal
Locked goal: Second hackathon
Next goal
1 / 2
Locked · goal
Locked goal: Second prize
Next goal
1 / 2
Locked · goal
Locked goal: Repro: 10 stars
Next goal
2 / 10
Locked · goal
Locked goal: 100 repos combined
Next goal
58 / 100
(06) By the numbersLive from GitHub · data as of September 30, 2026
Commit history.
6,311contributions in the last year, combined
58original public repos
10primary languages
15stars across those repos
6,311 contributions in the last year, the three of us combined.
4,680 contributions in the last year by Alexander.
1,368 contributions in the last year by Adrian.
263 contributions in the last year by Brandon.
GitHub data as of September 30, 2026
Languages
- Python14 repos · 25%
- JavaScript12 repos · 22%
- Rust8 repos · 15%
- TypeScript8 repos · 15%
- HTML3 repos · 5%
- Java3 repos · 5%
- Jupyter Notebook3 repos · 5%
- C2 repos · 4%
- C#1 repo · 2%
- GDScript1 repo · 2%
By primary language of original public repos · data as of September 30, 2026
(07) Latest from the blogAll posts
Latest posts
We won the Microsoft prize at ShellHacks 2026
Repro, the project we built in 36 hours at ShellHacks 2026, won the Microsoft prize. Here is what it is and why we built it the way we did.
How Repro proves a bug before it fixes it
Reproduce first, verify after, and a person merges. A walk through the six stages of the Repro pipeline.
Finding bugs with 0% of our model tokens
Repro spends none of its model tokens finding bugs and an estimated ~68% fewer tokens fixing them. Here is where those two numbers come from.