🤖 feat: mid-stream token usage updates #757
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Emit usage-delta events on AI SDK finish-step, allowing the UI to display live token counts as the AI generates multi-step responses. Backend: - Add UsageDeltaEvent type emitted on each finish-step - StreamManager tracks and emits usage after each tool call step - Forward events through AIService → AgentSession → IPC Frontend: - StreamingMessageAggregator stores active stream usage per messageId - WorkspaceStore exposes liveUsage in WorkspaceUsageState - CostsTab, RightSidebar, ChatMetaSidebar consume liveUsage for real-time context window display Tests: - Unit tests for usage-delta handling in StreamingMessageAggregator - Integration test for usage-delta events during multi-step streams
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Emit
usage-deltaevents on AI SDKfinish-step, allowing the UI to display live token counts as the AI generates multi-step responses.demo.mp4
Changes
Backend:
UsageDeltaEventtype emitted on eachfinish-stepStreamManageremits usage after each tool call step completesAIService→AgentSession→ IPCFrontend:
StreamingMessageAggregatorstores active stream usage per messageIdWorkspaceStoreexposesliveUsageinWorkspaceUsageStateCostsTab,RightSidebar,ChatMetaSidebarconsumeliveUsagefor real-time context window displayTests:
StreamingMessageAggregatorTesting
This feature has been tested with OpenAI, Anthropic & Google.
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