Patchbay lets a browser agent repair its own broken tool

Field notes

Patchbay compares a tool handler’s claimed result with the state visible in the active document, using the mismatch to create a receipt tied to the failed check. Its example uses a CANDIDATE_EMPTY failure: uplift_current_skill_v1 reports success without changing the Candidate editor, after which the page retires v1 and registers uplift_current_skill_v2. The page presents this as a five-step loop that lets the same agent retry without a reload or redeploy.