The read loop in ChatStream breaks immediately on io.EOF without
processing remaining buffered data. Per Go's io.Reader contract,
Read may return both n > 0 and io.EOF simultaneously, so the final
bytes (which may contain tool call deltas and [DONE]) are silently
discarded.
This causes the agentic loop to see tool_calls=0 even though the
model correctly produced tool calls in the stream.
Changes:
- Process pendingData when EOF is received before breaking
- Add fallback: emit accumulated tool calls if [DONE] was never
reached (server closed connection early)
Fixes#1411
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
kanylbullen
c9bbe8b3a8