## Thinking Path
> - Paperclip is the open source app people use to manage AI agents for
work.
> - Agents run through adapters; the `opencode-local` adapter shells out
to the OpenCode CLI and, before each run, does a pre-flight `opencode
models` **availability probe** to fail fast on a misconfigured
`provider/model`.
> - That probe was written to **throw on any probe failure** — a
timeout, a non-zero exit, or a transient `Unexpected error` from the CLI
— which aborts the whole heartbeat run.
> - In practice the CLI probe fails transiently (provider hiccup, cold
cache, momentary CLI error). When that happens *after* the agent has
already done its work, the run dies before its terminal disposition is
written, so the platform reopens the issue and re-runs it — a spurious
crash/re-run loop that affects every agent on the OpenCode adapter.
> - This PR makes the probe **non-fatal when it cannot run**: it warns
and proceeds with the configured model, letting the real invocation be
authoritative.
> - It deliberately **keeps** the genuine guard: when the probe
*succeeds* and the configured model is absent from a non-empty list, it
still throws (this is what catches misconfigured slugs).
> - The benefit is that a best-effort pre-flight check can no longer
take down an otherwise-healthy run, while the useful misconfiguration
guard is retained.
## Linked Issues or Issue Description
No public GitHub issue exists; describing inline (bug).
**What happened:** an OpenCode-adapter agent run terminated at the
adapter level with `` `opencode models` failed: Unexpected error ``. The
failure landed after the agent had produced its work, so the
terminal-status update never applied and the run was reopened and
re-executed.
**Expected:** a transient failure of the `opencode models` availability
*probe* should not abort the run — the probe is a best-effort pre-flight
guard, not a gate.
**Actual:** the probe threw on timeout / non-zero exit / empty output,
aborting the run and discarding the completed work + disposition.
**Scope:** both the local (`models.ts`) and remote/SSH (`execute.ts`)
probe paths; affects any agent on the `opencode_local` adapter.
Related PRs (context / prior art):
- Refs #5119 — added the remote execution-target model-probe validation
this PR softens.
- Refs #3291 — closed prior attempt to make the `opencode_local` model
probe non-blocking (at agent-create time; different entry point).
- Refs #8014 — related open work raising the probe timeout (20s → 60s);
complementary, not overlapping.
## What Changed
- `models.ts` (`ensureOpenCodeModelConfiguredAndAvailable`): if
discovery throws (probe can't run) or returns an empty list, **warn and
proceed** with the configured model instead of throwing. The "model
present in a non-empty list" check is unchanged and still throws when
the configured model is genuinely absent.
- `execute.ts` (`ensureRemoteOpenCodeModelConfiguredAndAvailable`):
remote probe **timeout / non-zero exit / empty output** now warn and
return (proceed) instead of throwing. The remote model-absent guard
still throws.
- `models.test.ts`: the local "discovery cannot run" case now asserts
the probe **proceeds** with the configured model (was: asserts it
rejects).
- `execute.test.ts`: added remote regression tests — non-zero exit,
timeout, and empty output all proceed; a successful probe missing the
configured model still rejects.
## Verification
```bash
pnpm --filter @paperclipai/adapter-opencode-local typecheck # clean
# opencode-local server suite (default 5s per-test timeout is too tight for the
# heavy SSH tests on some machines; use a realistic timeout):
node node_modules/.pnpm/vitest@*/node_modules/vitest/vitest.mjs run \
packages/adapters/opencode-local/src/server/models.test.ts \
packages/adapters/opencode-local/src/server/execute.test.ts \
packages/adapters/opencode-local/src/server/execute.remote.test.ts \
--testTimeout=45000
```
Result: typecheck clean; all opencode-local server tests pass, including
the new remote fail-open tests and the retained "model unavailable on
the remote target" guard test.
## Risks
- **Fail-open behavior (intentional).** When the probe can't run, a
genuinely misconfigured model is no longer caught at pre-flight — it
surfaces at the real invocation instead. This is the accepted tradeoff:
the probe is best-effort, and the real invocation is authoritative. The
high-value guard (probe succeeds + model absent from a non-empty list)
is retained, so the common misconfiguration — a bad `provider/model`
slug — is still caught.
- No API, schema, or migration changes. Behavior change is confined to
the two probe helpers. Low risk overall.
## Model Used
Anthropic **Claude Opus 4.8** (`claude-opus-4-8`), used via Claude Code
with agentic tool use (repo search, file editing, shell/code execution)
and extended reasoning. Used to diagnose the crash, implement the fix,
and write the tests; the change was reviewed before submission.
## Checklist
- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have searched GitHub for duplicate or related PRs and linked
them above
- [x] I have either (a) linked existing issues with `Fixes: #` / `Closes
#` / `Refs #` OR (b) described the issue in-PR following the relevant
issue template
- [x] I have not referenced internal/instance-local Paperclip issues or
links
- [x] My branch name describes the change
(`fix/opencode-model-probe-non-fatal`) and contains no internal ticket
id
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [ ] I have updated relevant documentation to reflect my changes — N/A
(internal adapter behavior; no user-facing docs affected)
- [x] I have considered and documented any risks above
- [x] All Paperclip CI gates are green (functional gates:
tests/build/e2e/typecheck/security). Review/Greptile gate re-running
after this update.
- [ ] Greptile is 5/5 with no open P2s — re-triggered after addressing
both P2s (remote test coverage + this template-complete description)
- [x] I will address all Greptile and reviewer comments before
requesting merge
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