fix: add core web vitals to performance_start_trace description#168
Merged
jackfranklin merged 3 commits intomainfrom Sep 26, 2025
Merged
fix: add core web vitals to performance_start_trace description#168jackfranklin merged 3 commits intomainfrom
jackfranklin merged 3 commits intomainfrom
Conversation
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
approved these changes
Sep 26, 2025
OrKoN
pushed a commit
that referenced
this pull request
Sep 26, 2025
🤖 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).
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
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.