Propagate Copilot usage from SDK to agent session#320897
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Pull request overview
This PR propagates Copilot credit usage (from the Copilot SDK’s runtime-only copilotUsage field) into Agent Host session usage metadata so the agent sessions UI can display accurate per-turn AIC/credit cost instead of falling back to the coarse cost value.
Changes:
- Accumulate
copilotUsage.totalNanoAiuacrossassistant.usageevents within a turn and attach it toUsageInfo._meta.copilotUsage. - Reset the per-turn Copilot usage accumulator when starting/resetting a turn.
- Extend the
CopilotAgentSessionunit test to assert cumulativecopilotUsagemetadata across multiple usage events.
Show a summary per file
| File | Description |
|---|---|
| src/vs/platform/agentHost/node/copilot/copilotAgentSession.ts | Tracks and emits cumulative per-turn copilotUsage.totalNanoAiu via usage _meta so downstream UI can compute credits accurately. |
| src/vs/platform/agentHost/test/node/copilotAgentSession.test.ts | Adds coverage verifying that copilotUsage metadata is emitted and accumulated across usage events. |
Copilot's findings
- Files reviewed: 2/2 changed files
- Comments generated: 3
DonJayamanne
approved these changes
Jun 11, 2026
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Fixes #319771
Fixes #315160