Function toWire

internal/llm/llm.go:607–630

(msgs []chmctx.Message)

	var (
		fullContent  strings.Builder
		slots        = map[int]*toolSlot{}
		order        []int
		tokens       int
		promptTokens int
		// complete goes true on any end-of-stream signal: [DONE], a non-empty
		// finish_reason, or a usage frame. A stream that ends without one was
		// cut, not finished - a proxy/LB gracefully closing the upstream
		// mid-generation looks exactly like clean EOF to the scanner, and
		// finalizing it would hand the TUI a mid-sentence assistant message as
		// a clean finish: a transport-level false green no nudge can see.
		complete bool
	)

	for scanner.Scan() {
		// Any line (data, blank separator, or ": keepalive" comment) is liveness
		// and rearms the idle watchdog. Only a `data:` line means the model has
		// actually started PRODUCING, which is the separate question of whether
		// the long prefill window is over: a proxy that emits one comment at
		// 200 OK (LiteLLM/nginx SSE shims, OpenRouter's ": OPENROUTER
		// PROCESSING") must not collapse the prefill window to the inter-frame
		// one, nor make the resulting deterministic prefill stall look like a
		// replayable mid-stream drop.
		line := bytes.TrimSpace(scanner.Bytes())
		isData := bytes.HasPrefix(line, []byte("data:"))
		onFrame(isData)
		if len(line) == 0 || !isData {