Adds `test/session/llm-native-stream.test.ts` — one focused test that
proves the end-to-end wire-up `runNative` relies on actually produces
session events from a scripted Anthropic SSE response.
The test stays self-contained:
- Builds a fake Anthropic `Provider.Info` + `Provider.Model` via
`ProviderTest`.
- Builds an `LLMRequest` via `LLMNative.request(...)` from a
`MessageV2.WithParts` user message — the same call shape `runNative`
uses inside `session/llm.ts`.
- Creates an `LLMClient` with the same adapters list + `ProviderPatch.defaults`
list as `runNative`. The adapters are imported directly from
`@opencode-ai/llm`; if `runNative`'s `NATIVE_ADAPTERS` array changes,
this test's `adapters` constant has to follow (commented).
- Provides a single fixed-response HTTP layer that returns a scripted
Anthropic SSE body. The layer helper is inlined (12 lines) rather
than imported from `packages/llm/test/lib/http.ts` so the test
doesn't reach across package boundaries.
- Pipes the LLM stream through `LLMNativeEvents.mapper()` exactly as
`runNative` does (`Stream.flatMap` + lazy `Stream.concat` for
flush), runs it to completion, and asserts the key session events:
`text-start` precedes `text-delta`, `finish-step` carries
`finishReason: "stop"`, and `finish` carries the merged usage totals.
This does NOT test the dispatch gate inside `session/llm.ts`
(`!Flag.OPENCODE_EXPERIMENTAL_LLM_NATIVE`, missing `nativeMessages`,
tools present, non-Anthropic protocol). Those are simple boolean
conditions and don't need separate coverage. It also does not exercise
the production `Service` layer — that's deferred to Phase 2 step 2
(tool support) and Phase 2 step 3 (production caller wiring).
What the test buys: confidence that the conversion pipeline works and
catches regressions in `LLMNative.request`, the LLM adapter set, or
`LLMNativeEvents.mapper` before they would surface in a real session.
Verification: 34/0/0 across the three bridge-area tests
(`llm-native.test.ts` + `llm-native-stream.test.ts` +
`llm-bridge.test.ts`); opencode typecheck clean.
Kit Langton
afba37d330