Reproduce model connection failures and interrupted responses in the desktop app using a local fault server and test providers. Check error messages and retry behavior for refused connections, DNS failures, HTTP errors, stalled requests, and cut streams.
Make the desktop's model provider fail on demand (connection refused, DNS not found, socket reset, 429, 5xx, 401, 402, stalled or cut stream) with a local fault server and test providers. Use when reproducing or designing model error and retry states without a real outage.
Review the instructions the agent will receive before you install.
Real provider errors come from the engine (the opencode sidecar), not from the window, so CDP network throttling cannot produce them. This skill points test providers at failures instead.
F=.opencode/skills/fake-model-faults/scripts
node $F/fault-server.mjs & # 127.0.0.1:55600 (PORT=… to change)
python3 $F/fault-providers.py add # backs up runtime.sqlite, adds three providers
CDP_URL=http://127.0.0.1:<cdp> node .opencode/skills/drive-desktop-cdp/scripts/cdp.mjs refresh-providers # expect 200
Writing the v2 engine config directly does not stick; the server rewrites it from the global runtime config within seconds. refresh-providers saves a dummy fault-lab key so the server mirrors providers immediately.
| Provider · model | Engine error you get |
|---|---|
Fault Refused · refused | ConnectionRefused: Unable to connect… (closed port), with retries |
Fault DNS · enotfound | getaddrinfo ENOTFOUND … (a .invalid host), with retries |
Fault Lab · reset | ECONNRESET: The socket connection was closed unexpectedly…, with retries |
Fault Lab · mid-stream-reset | partial reply, then the socket closes |
Fault Lab · stall | the request never answers |
Fault Lab · http-429 / http-500 / http-503 / http-401 / http-402 | that HTTP status with a JSON error body |
Fault Lab · ok | a normal short reply (checks the pipeline) |
A DNS timeout (getaddrinfo ETIMEOUT) and the "OpenWork Cloud is temporarily unavailable" banner need a real network cut: turn Wi-Fi off for about 40 seconds (networksetup -setairportpower en0 off, then on). Ask first; it drops the whole machine, including VPNs.
python3 $F/fault-providers.py remove
CDP_URL=… node .opencode/skills/drive-desktop-cdp/scripts/cdp.mjs eval '(async()=>{const w=(location.hash.match(/#\/workspace\/([^/]+)/)||[])[1];const r=await fetch("http://127.0.0.1:"+localStorage.getItem("openwork.server.port")+"/workspace/"+w+"/opencode/auth/fault-lab",{method:"DELETE",headers:{Authorization:"Bearer "+localStorage.getItem("openwork.server.token")}});return r.status})()'
kill %1 # the fault server
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