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feat(telemetry): persist date of the last tool call. - #2705
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🤖 I have created a release *beep* *boop* --- ## [1.10.0](ChromeDevTools/chrome-devtools-mcp@chrome-devtools-mcp-v1.9.0...chrome-devtools-mcp-v1.10.0) (2026-09-23) ### 🎉 Features * add css formatter class ([ChromeDevTools#2707](ChromeDevTools#2707)) ([f0b5fa4](ChromeDevTools@f0b5fa4)) * add get_css_style tool ([ChromeDevTools#2612](ChromeDevTools#2612)) ([4454ae0](ChromeDevTools@4454ae0)) * **performance:** chunked trace buffer parser for large recordings ([ChromeDevTools#2721](ChromeDevTools#2721)) ([23b9a48](ChromeDevTools@23b9a48)) * set default pageSize and pageIdx for get_css_styles tool ([ChromeDevTools#2799](ChromeDevTools#2799)) ([dc9d14d](ChromeDevTools@dc9d14d)) * support config file ([ChromeDevTools#2661](ChromeDevTools#2661)) ([314a5fa](ChromeDevTools@314a5fa)) * **telemetry:** persist date of the last tool call. ([ChromeDevTools#2705](ChromeDevTools#2705)) ([c54a493](ChromeDevTools@c54a493)) * **telemetry:** recording a sanitized version of the client name ([ChromeDevTools#2757](ChromeDevTools#2757)) ([55fbc57](ChromeDevTools@55fbc57)) * **telemetry:** report hermes client usage. ([ChromeDevTools#2703](ChromeDevTools#2703)) ([fb47e6c](ChromeDevTools@fb47e6c)) * update css formatter class to add AtRule, PositionTryRule, PropertyRule, FunctionRule ([ChromeDevTools#2717](ChromeDevTools#2717)) ([d4a0620](ChromeDevTools@d4a0620)) * update css formatter class to add inherited rules ([ChromeDevTools#2715](ChromeDevTools#2715)) ([3d7e7bb](ChromeDevTools@3d7e7bb)) * update css formatter class to add matched rules ([ChromeDevTools#2713](ChromeDevTools#2713)) ([8c8616f](ChromeDevTools@8c8616f)) * update css formatter class to add pseudo element ([ChromeDevTools#2716](ChromeDevTools#2716)) ([df1469a](ChromeDevTools@df1469a)) * update css formatter to add keyframes rules ([ChromeDevTools#2718](ChromeDevTools#2718)) ([cdc365c](ChromeDevTools@cdc365c)) ### 🛠️ Fixes * bound ConsoleCollector retention per navigation ([ChromeDevTools#2773](ChromeDevTools#2773)) ([e98a3ca](ChromeDevTools@e98a3ca)) * **cli:** forward explicit false options on start ([ChromeDevTools#2702](ChromeDevTools#2702)) ([d9a8cb6](ChromeDevTools@d9a8cb6)) * **config:** preserve raw values for config coercion ([ChromeDevTools#2747](ChromeDevTools#2747)) ([906c83b](ChromeDevTools@906c83b)) * don't log Puppeteer logs to file unless requested ([ChromeDevTools#2743](ChromeDevTools#2743)) ([4fbfbc4](ChromeDevTools@4fbfbc4)) * explain launch failures caused by running as root ([ChromeDevTools#2634](ChromeDevTools#2634)) ([9d29223](ChromeDevTools@9d29223)) * handle JavaScript dialogs opened during input tool actions ([ChromeDevTools#2794](ChromeDevTools#2794)) ([266112b](ChromeDevTools@266112b)) * **performance:** prevent memory leak by scoping trace engine model per parse ([ChromeDevTools#2720](ChromeDevTools#2720)) ([d05cbc0](ChromeDevTools@d05cbc0)) * preserve console history across same-document navigations ([ChromeDevTools#2676](ChromeDevTools#2676)) ([aa25562](ChromeDevTools@aa25562)) * preserve underlying error message in input tool actions ([ChromeDevTools#2792](ChromeDevTools#2792)) ([6e47dbb](ChromeDevTools@6e47dbb)) * set emulatedUserAgent and use finalDisplayedUrl in lighthouse_audit ([ChromeDevTools#2795](ChromeDevTools#2795)) ([941f82a](ChromeDevTools@941f82a)) * timout in WaitForHelper.ts ([ChromeDevTools#2772](ChromeDevTools#2772)) ([dc1d055](ChromeDevTools@dc1d055)) ### 📄 Documentation * add FLUJO client configuration ([ChromeDevTools#2690](ChromeDevTools#2690)) ([65a679e](ChromeDevTools@65a679e)) * fix categories not being configured correclty ([ChromeDevTools#2807](ChromeDevTools#2807)) ([2250cdc](ChromeDevTools@2250cdc)) * fix defaults for non-boolean values ([ChromeDevTools#2744](ChromeDevTools#2744)) ([342d243](ChromeDevTools@342d243)) * update page routing option name ([ChromeDevTools#2748](ChromeDevTools#2748)) ([8939965](ChromeDevTools@8939965)) * update SKILL for chrome-devtools to use get_css_styles tool ([ChromeDevTools#2760](ChromeDevTools#2760)) ([421011e](ChromeDevTools@421011e)) ### 🏗️ Refactor * disable tools instead of not registering them ([ChromeDevTools#2636](ChromeDevTools#2636)) ([b455469](ChromeDevTools@b455469)) * extract browser in a BrowserManager class ([ChromeDevTools#2787](ChromeDevTools#2787)) ([3228f44](ChromeDevTools@3228f44)) * migrate the MCP SDK to v2 ([ChromeDevTools#2408](ChromeDevTools#2408)) ([da3c406](ChromeDevTools@da3c406)) * move comments formatting to CommentFormatter class ([ChromeDevTools#2719](ChromeDevTools#2719)) ([e3cded0](ChromeDevTools@e3cded0)) * prepare for SDK v2 ([ChromeDevTools#2771](ChromeDevTools#2771)) ([61780c7](ChromeDevTools@61780c7)) * simplify our gen scritps ([ChromeDevTools#2793](ChromeDevTools#2793)) ([5068584](ChromeDevTools@5068584)) * unify call type and ensure typesafety ([ChromeDevTools#2659](ChromeDevTools#2659)) ([882f93e](ChromeDevTools@882f93e)) --- 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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The state file is now loaded into memory and stored within ClearcutLogger. At each tool call it checks whether it's been more than one day since the recorded value in the state file, and if so, log the last tool active, and update the state file.
Regarding the state file's format, lastToolCall is not exactly the very last one, but rather the last one that was logged. This is the same with the existing lastActive timestamp (i.e. it's not the last timestamp when the server is active, but rather the last timestamp when the active status is logged). So here we keep the definitions consistent.
A caveat for future improvement: arguably the loadState() and writeState() and everything in between should be a atomic unit (there might be multiple mcp servers running), but I think it's probably good enough for now. If we see weirdness we can make that happen.
I also added format guards to loadState() so we don't have to try and catch everywhere else when de-serializing the string. We should actually just deserialize in loadState() but let me do this in a follow-up CL.