fix: allow extension to load when offline

[k3-2o]

Problem

Pi refuses to start when offline because fetchCommandCodeModels() at extension init throws when it can't reach the API. This blocks the entire editor with:

Error: Failed to load extension: Unable to connect. Is the computer able to access the url?

Trade-off

Models won't appear in the model selector until the user runs /reload after reconnecting. This is documented in the changelog.

Testing

• 38/39 existing tests pass (1 pre-existing flaky abort-timing test)
• Verified manually: pi starts offline without error, /reload repopulates models when online

[k3-2o]

Closing based on what was read in issue #5 and PR #6.

But based on their new v1, these guys are slowly becoming pi — funny as hell. Only fair they let pi use the Go plan if it's an inspiration source 🤷

[patlux]

I reproduced the startup failure against both pi 0.75.5 and 0.82.1 by pointing COMMANDCODE_MODELS_URL at an unreachable local endpoint.

I pushed follow-up changes that make the fallback useful when Command Code is already selected:

• cache the last validated model catalog at <agent-dir>/commandcode-models.json (~/.pi/agent/commandcode-models.json by default)
• resolve the location through the host's getAgentDir(), so OMP uses its own agent directory and PI_CODING_AGENT_DIR is respected
• keep COMMANDCODE_MODELS_CACHE as an explicit override for tests and custom setups
• use the cached catalog when model discovery fails, so cached models remain selectable offline
• keep a first offline start without a cache non-fatal and emit a clear warning
• validate cache contents and write updates atomically
• keep live models usable if the cache cannot be written
• add unit coverage for network, HTTP, JSON, corrupt-cache, and write-failure cases
• add real pi integration coverage for first offline startup, agent-directory path resolution, and selecting a cached model while discovery is offline
• add OMP path coverage for its isolated agent directory
• make the pi integration test hermetic with a temporary home, mock auth, and isolated agent directory

Validation:

• npm test — pass (81 tests; OMP compatibility test skipped because omp is not installed)
• pi 0.75.5 compatibility and PI_CODING_AGENT_DIR path resolution — manually verified
• npm run format:check — pass
• git diff --check — pass
• npm pack --dry-run — pass

[patlux]

Looks good.

Offline discovery no longer blocks pi startup, last-known-good models stay selectable from the host agent-dir cache, recovery after an empty offline start is covered, and CI is green after the protobufjs lockfile bump.

[patlux]

Shipped in pi-commandcode-provider@0.4.3 / GitHub release v0.4.3.