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feat: Enable capture of profiling data (#290)

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* feat: Enable capture of profiling data

Adding a new set of commands:
```
agent-browser profiler start

agent-browser profiler stop trace.json
```

With this, agents can start a profiling trace, perform a set of actions, and then extract the profiling data for analysis.

**Note:** I was originally going to call it `agent-browser profile` but I realized that might cause confusion with the `--profile` flag

CDP supports a couple commands for starting/stopping a trace.
When a trace is running, it emits events that need to be picked up.
We store these locally in the daemon until the trace is completed.
When the final event is received, we dump all of them into an output file.

That file can be loaded directly into chrome devtools or another analysis tool to visualize what happened during the agentic run.

Added some basic rust tests for parsing the commands (since they have some optional / required args)

TS daemon adds ~6 tests to make sure the profiling lifecycle (including saving the output file) works as intended

* add docs

* fixes

* fixes

---------

Co-authored-by: Chris Tate <chris@ctate.dev>
This commit is contained in:
Andrew Imm
2026-02-17 23:11:11 -06:00
committed by GitHub
co-authored by Chris Tate
parent 9ca182a4df
commit 59fa36b6e2
14 changed files with 729 additions and 6 deletions
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skills/agent-browser/SKILL.md
+3
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@@ -162,6 +162,8 @@ agent-browser --cdp 9222 snapshot
agent-browser --headed open https://example.com
agent-browser highlight @e1 # Highlight element
agent-browser record start demo.webm # Record session
agent-browser profiler start # Start Chrome DevTools profiling
agent-browser profiler stop trace.json # Stop and save profile (path optional)
```
### Local Files (PDFs, HTML)
@@ -323,6 +325,7 @@ Priority (lowest to highest): `~/.agent-browser/config.json` < `./agent-browser.
| [references/session-management.md](references/session-management.md) | Parallel sessions, state persistence, concurrent scraping |
| [references/authentication.md](references/authentication.md) | Login flows, OAuth, 2FA handling, state reuse |
| [references/video-recording.md](references/video-recording.md) | Recording workflows for debugging and documentation |
| [references/profiling.md](references/profiling.md) | Chrome DevTools profiling for performance analysis |
| [references/proxy-support.md](references/proxy-support.md) | Proxy configuration, geo-testing, rotating proxies |
## Ready-to-Use Templates