Add promptTypes to summarizedConversationHistory telemetry#311790
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Add promptTypes to summarizedConversationHistory telemetry#311790
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Pull request overview
This PR extends Copilot’s summarization telemetry by adding a promptTypes property to summarizedConversationHistory events so prompt structure can be correlated with server-side prompt cache hit rates (similar to existing panel.request telemetry).
Changes:
- Add
promptTypescomputation and emission forsummarizedConversationHistoryon successful summarization in the standard summarizer flow. - Add
promptTypesemission for the background inline summarization success telemetry path.
Show a summary per file
| File | Description |
|---|---|
| extensions/copilot/src/extension/prompts/node/agent/summarizedConversationHistory.tsx | Captures rendered summarization messages and emits promptTypes on success in summarizedConversationHistory telemetry. |
| extensions/copilot/src/extension/intents/node/agentIntent.ts | Emits promptTypes for the background inline summarization success path to match standard summarizer telemetry. |
Copilot's findings
Comments suppressed due to low confidence (1)
extensions/copilot/src/extension/prompts/node/agent/summarizedConversationHistory.tsx:841
- The
promptTypesformat in this event includes an optional-<name>segment (e.g.tool-myTool:123) when messages have aname, but the GDPR comment/example only mentionsrole:charCount. Update the comment to reflect the actual emitted format so downstream consumers don’t mis-parse it.
"promptTypes": { "classification": "SystemMetaData", "purpose": "FeatureInsight", "comment": "Role and character count of each prompt message in order, as a proxy for cache hit rate (e.g. system:1234,user:567)." },
- Files reviewed: 2/2 changed files
- Comments generated: 2
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Screenshot ChangesBase: Changed (1)
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roblourens
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Apr 21, 2026
Adds a promptTypes property to summarizedConversationHistory telemetry events, mirroring the same property already on panel.request events. This is a comma-separated string of role:charCount entries (e.g. system:1234,user:567) representing each message in the summarization request in order. This helps correlate cache hit rates with prompt structure divergence across summarization calls, giving visibility into where prompts diverged from the previous request. Changes: - summarizedConversationHistory.tsx: added promptTypes to sendSummarizationTelemetry using post-transformation messages (after strip operations) - agentIntent.ts: added promptTypes to inline summarization success telemetry
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Adds a
promptTypesproperty tosummarizedConversationHistorytelemetry events, mirroring the same property already onpanel.requestevents.