What our experimental self-healing software loop shipped in two weeks

A two-week pilot combined Fullstory production monitoring, Replay QA diagnosis and verification, and Obvious code generation into a self-healing development loop that opened 152 autonomous pull requests, of which engineers merged 80 after reviewing evidence. The system identified 124 distinct bugs, fixed 76 on the main branch, and verified every merged fix by either replaying the original frontend session or independently reproducing backend failures against the PR preview. Performance and security issues represented notable categories, while high-severity cases more often required human judgment about intended behavior. The authors argue that code generation was not the limiting factor; reproducible, inspectable proof that an original failure no longer occurs made automated fixes trustworthy enough to merge. They compare their findings with related automated software-factory work and Google research showing that reproduction tests improve repair success, emphasizing that recorded session traces can avoid the difficult task of reconstructing frontend failures. The team plans to develop a version of the loop that other organizations can integrate into their own software-development workflows.

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