AiProviders.completeStream() — async iterable over provider chunks.
- OpenAI-style (openai, ollama, lmstudio, *-compatible): parses
SSE data: {choices:[{delta:{content}}]} payloads.
- Anthropic: parses event: content_block_delta with delta.text.
- Honours caller AbortSignal + internal timeout via AbortController.
- shared parseSseStream() helper handles [DONE] sentinel, partial
lines across chunk boundaries, reader.releaseLock() in finally.
main.js IPC:
- 'ai-assist-stream:start' (send) registers a per-requestId entry
in a Map with an AbortController, iterates completeStream, and
forwards each chunk via 'ai-assist-stream:chunk' (send).
- 'ai-assist-stream:cancel' (send) aborts the in-flight request.
- Terminal 'done' or 'error' (with code+message) is sent after
each stream; renderer can correlate by requestId.
preload.js exposes aiAssist.{start, cancel, onChunk, onDone, onError}.
5 new tests covering OpenAI delta parsing, Anthropic content_block_delta
parsing, and three synchronous-error paths (no fetch, no messages,
missing key).
Amit Haridas
