Read the handler the author says he should have rejected. `do_GET` compares `self.path` to `/health`, sends 200, and writes `b"ok\n"`; everything else gets a 404 [10]. There is no filesystem read in that function, no queue depth, no reference to another pid. So the set of things it can catch is short: the process dying, the socket never binding, the accept loop blocking long enough for the caller to time out. A worker that never started is in none of those states, because the worker does not exist inside that handler's world [10].
The same file overrides `log_message` to return immediately [10]. The example probe therefore answers without leaving a line behind, which is a detail worth noticing if you plan to reconstruct the timeline afterwards.
The signal that would have caught this was being produced the whole time and never consumed. The worker was meant to refresh a heartbeat file every fifteen seconds [4]. Across forty-eight hours [1], that is 11,520 writes that should have landed [16].
A heartbeat file gives a probe three answers instead of one. Fresh, meaning mtime inside the threshold. Stale, meaning the file is there and the writer is not. Absent, which is where the author's own experiment turns awkward: the heartbeat lived under `/tmp`, and after the free remote shell recycled, `stat` reported no such file [12]. He describes hours where he could not tell a dead worker from a disk that had forgotten [13]. In my context I would set the staleness threshold at three intervals, 45 seconds for a 15-second writer [17], because one interval flaps on ordinary scheduling jitter, and I would put the file on a path with the same lifecycle as the process that writes it. `/tmp` is always writable, which is a different property from always being there [12].
For this failure to be yours, three things have to hold: one process in the deploy unit listens, another does the work you actually care about, and the check only knows about the listener [3][6]. If your worker exposes its own port or its own readiness route, the story does not transfer.
The patch that a free coding model produced is the predictable output of the prompt it was given. The author pasted a service layout, not a process table, and says as much [9][11]. The model wired `/health` to a constant on the socket that already answered [9]. What I would flag at review is the acceptance criteria: it compiled, it started, and curl looked busy [9].
Where the note comes from is part of reading it. It discloses that it was prepared as part of MonkeyCode's product outreach, that the candidate probes were drafted using MonkeyCode's free model access, and that the service was run on the free server option so the laptop's working directory would not hide the lie [14]. The vendor's free tier is both the demo environment and the origin of the patch the author faults, and the piece says so itself [14]. The reconstruction is the good craft here: the failure was rebuilt as a small local example that replays without the original queue [18].
The acceptance test is cheap to state. Kill the worker, leave the web process running, and see whether the check goes red. A script that cannot print `health: missing worker` has not earned the right to print `health: ok` [15].
