Recall Storm
On January 1, 2027, California bans food containing Red No.
Core trick
Writes a 646k-token compliance codebase in one continued generation, then a 20-store simulated drill verifier finds scheduling conflicts for repair.
Description
On January 1, 2027, California bans food containing Red No. 3, with no sell-through period. The dye hides under a dozen names (erythrosine, E127, "Red 3", scanning typos), and a large retailer has one overnight shift to clear it from thousands of shelf spots. That job is many parts that must agree: reading labels, the law's dates, every shelf, every shift, substitutes and return trucks.
Recall Storm asks Gemini 4 Argon to write that whole compliance system in one continued generation, then proves where it holds and fixes where it breaks. Our largest run wrote 646,825 tokens of code, 911 files, over 10 continuation hops with every seam clean. After a one-line fix, all 6,581 cross-file links resolve with zero argument mismatches; a test written at token 641,687 calls a function written 552,000 tokens earlier, and passes.
An independent verifier then runs the plan as a 20-store simulated drill and finds what consistent code can hide: 21,459 plan mistakes, mostly people booked at two shelves at once or outside their shift. A managed agent, given only the failing file and half of the failures, found the root cause and fixed it: scheduling mistakes went from 21,284 to 0, including in 10 stores it never saw, and the plan from 21,459 mistakes to 175. Argon's working core finds all 467 affected products, pulls none of 483 look-alikes, and plans every task before midnight. Stores, stock and staffing are simulated; every number comes from the verifier, and Argon's output is unedited in the repo, with every fix logged separately.
README excerpt
# Recall Storm Gemini 4 Argon SF Hackathon, Track 1 (Million Token Engineering), Oct 25, 2026. **In one minute.** On January 1, 2027, California bans food containing Red No. 3, with no sell-through period. We asked Gemini 4 Argon to write the whole compliance system that clears it from store shelves overnight, then checked it. - **One continued generation, 646,825 tokens:** 911 files over 10 hops, every seam clean. After one one-line fix by a managed agent, all 6,581 cross-file links resolve with zero argument mismatches. A test written at token 641,687 calls a function written at token 89,603, and passes. - **Consistent isn't correct:** our verifier ran that plan and found 21,459 mistakes, mostly people booked at two shelves at once or outside their shift. A managed agent found the root cause: scheduling mistakes went from 21,284 to 0, including in stores it never saw, and the plan from 21,459 mistakes to 175. - **A working system:** Argon's core, with three small logged fixes, finds all 467 products containing Red No. 3 across a 20-store simulated drill, pulls none of the 483 look-alikes, and makes zero plan mistakes. `./demo.sh` runs it live in about 5 seconds. Everything here was built at the event. Stores, stock and staffing are simulated; every number comes from the verifier (`tools/`, `reports/`). Argon's output in `gen/` is unedited; every fix is in `patches/`, including the attempts that failed. A compliance drill for California AB 418 (FD&C Red No.