Function TestChatSendsStreamIncludeUsage

internal/llm/llm_test.go:346–358

TestChatSendsStreamIncludeUsage: servers emit the usage block only when `stream_options.include_usage:true` is in the request; without it the per-turn token counter sits at 0. Every Chat call must ship the flag.

(t *testing.T)

		{Role: chmctx.RoleSystem, Content: "be terse"},
		{Role: chmctx.RoleUser, Content: "run it"},
		{Role: chmctx.RoleAssistant, Content: "Running.", Reasoning: []json.RawMessage{json.RawMessage(`{"type":"reasoning","id":"rs_1"}`)},
			ToolCalls: []chmctx.ToolCall{{ID: "c1", Name: "bash", Arguments: map[string]any{"cmd": "true"}}}},
		{Role: chmctx.RoleTool, Content: "", ToolCallID: "c1", ToolName: "bash"},
	}
	buf, err := json.Marshal(toInput(msgs))
	if err != nil {
		t.Fatalf("marshal: %v", err)
	}
	want := `[{"type":"message","role":"system","content":"be terse"},` +
		`{"type":"message","role":"user","content":"run it"},` +
		`{"type":"reasoning","id":"rs_1"},` +
		`{"type":"message","role":"assistant","content":"Running."},` +
		`{"type":"function_call","call_id":"c1","name":"bash","arguments":"{\"cmd\":\"true\"}"},` +
		`{"type":"function_call_output","call_id":"c1","output":""}]`
	if string(buf) != want {
		t.Fatalf("toInput =\n%s\nwant\n%s", buf, want)