Add messagesApi.refusal telemetry and remove noisy unknownContentBlock event#311718
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Add messagesApi.refusal telemetry and remove noisy unknownContentBlock event#311718
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Pull request overview
This PR improves Anthropic Messages API telemetry by adding a dedicated refusal event (with category) while removing a noisy “unknown content block” event that was triggering on common block types.
Changes:
- Add parsing/storage of
delta.stop_detailsfrom the Messages API stream. - Emit new
messagesApi.refusaltelemetry whenstop_reason === 'refusal', capturing the refusal category. - Remove
messagesApi.unknownContentBlocktelemetry to reduce noise from benigncontent_block_startevents.
Show a summary per file
| File | Description |
|---|---|
| extensions/copilot/src/platform/endpoint/node/messagesApi.ts | Parses stop_details, adds refusal telemetry, and removes noisy unknown content block telemetry/logging. |
Copilot's findings
- Files reviewed: 1/1 changed files
- Comments generated: 1
dmitrivMS
approved these changes
Apr 21, 2026
…k event - Add dedicated messagesApi.refusal telemetry event that fires on Anthropic refusals, capturing the stop_details category (e.g. cyber, content_policy) - Parse stop_details from message_delta stream events - Remove messagesApi.unknownContentBlock telemetry which was firing on every text content_block_start, producing noise instead of actionable signal
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Summary
messagesApi.refusaltelemetry event that fires when Anthropic returnsstop_reason === 'refusal', capturing thestop_details.category(e.g.cyber,content_policy). This enables tracking cyber refusals and other policy blocks in telemetry.stop_detailsfrommessage_deltastream events and store on the processor.messagesApi.unknownContentBlocktelemetry — this was firing on everytextcontent block start, producing noise instead of actionable signal. Unrecognized content block types are now silently ignored (their content is still handled viacontent_block_delta).Telemetry
New event:
messagesApi.refusalrequestId— for correlationmodel— the model that produced the refusalcategory— the refusal category (e.g.cyber,content_policy)