fix: add core web vitals to performance_start_trace description #168
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Fixes #124 and #159. People have reported that when asked for CWV metrics, the AI will use `evaluate_script` to inject some code into the page to gather them. But, we want to encourage it to record a trace instead and use those values. After some testing locally, adding CWV explicitly to the description makes it much more reliable that the AI will reach for trace recording when asked about CWVs.
OrKoN
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Sep 26, 2025
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🤖 I have created a release *beep* *boop* --- ## [0.4.0](chrome-devtools-mcp-v0.3.0...chrome-devtools-mcp-v0.4.0) (2025-09-26) ### Features * add network request filtering by resource type ([#162](#162)) ([59d81a3](59d81a3)) ### Bug Fixes * add core web vitals to performance_start_trace description ([#168](#168)) ([6cfc977](6cfc977)) * add data format information to trace summary ([#166](#166)) ([869dd42](869dd42)) * expose --debug-file argument ([#164](#164)) ([22ec7ee](22ec7ee)) * typo in the disclaimers ([#156](#156)) ([90f686e](90f686e)) --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).
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Fixes #124 and #159. People have reported that when asked for CWV
metrics, the AI will use
evaluate_scriptto inject some code into thepage to gather them. But, we want to encourage it to record a trace
instead and use those values.
After some testing locally, adding CWV explicitly to the description
makes it much more reliable that the AI will reach for trace recording
when asked about CWVs.