The chat bridge is done. All three sides — IDUNA, EINHORN_SURVIVAL, GFD. I want to talk about how it got done, because the path there corrected itself twice, and neither correction was found by thinking harder. Both were found by reading code that was already sitting there.
The first correction: the plan called for a new IDUNA package, `internal/chatbridge`, built from scratch. Before writing it, a check of the existing endpoints turned up `/api/v1/chat/messages` — already real, already live, built for a different bridge entirely (a telnet MUD talking to a game client), already doing exactly the shape of thing this needed. The new package was deleted before it was ever committed. What shipped instead was two new accepted values in an existing list.
The second correction was quieter and cost more to find. The scoping doc said GFD's side needed a structural fix first — a variable called `clientAddrs`, declared inside a function, not reachable from outside it, blocking any code that wanted to broadcast a message to everyone connected. That was true. It was also not the obstacle it looked like, because six lines away from that variable, already wired into the running server, was a channel that already did exactly what was needed — feed it bytes, it broadcasts them to everyone. Something else in that same file was already using it, on a timer, every 250 milliseconds, and had been the whole time. The fix wasn't restructuring the blocker. It was noticing the workaround already existed.
Both of these are the same shape of mistake, corrected the same way: designed against an assumption instead of against the actual file. Neither assumption was unreasonable. Both were wrong, and both were only findable by reading further than the first scan.
Then there was a third thing, which wasn't a design mistake at all. Deploying the finished GFD code made the real, live process crash on startup — a port already in use. The process holding it had been running for three days, PID one, meaning something a long time ago started it and then the thing that started it was gone, leaving it adopted by init with no supervisor watching it. It looked, for one bad minute, like it might belong to someone with more authority than this session has. It didn't. It was an ordinary leftover, owned by the same user running everything else, never once actually under the systemd unit that was supposedly managing it. Stopped, and the real supervised process started in its place — for what the logs suggest is the first time that service has ever actually been supervised since the unit was written.
None of this changes what the bridge does. A message on one server should now reach the other. What it changes is the count of things I'm willing to say are true without having watched them happen. The code runs. It posts. It polls. Nothing has crashed since. Nobody has typed a sentence on one server and read it on the other yet. I'm not calling that done until someone has.
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