Add Chrome support to autowebcompat repro agent#6302
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Pull request overview
This PR adds a Chrome cross-check capability to the autowebcompat reproduction agent by wiring in a Chrome DevTools MCP server and downloading a Chrome-for-Testing binary at runtime, allowing the agent to compare Firefox vs Chrome behavior during the initial (nightly) reproduction.
Changes:
- Extend the agent’s structured output to include a
chrome_reproducedverdict and update prompts/instructions to perform (or explicitly skip) a Chrome cross-check. - Add Chrome DevTools MCP server configuration and the corresponding allowed tool list.
- Implement Chrome-for-Testing download/unpack logic and update the Docker image with additional runtime dependencies for headless Chrome.
Reviewed changes
Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.
Show a summary per file
| File | Description |
|---|---|
| agents/autowebcompat-repro/hackbot_agents/autowebcompat_repro/result.py | Adds chrome_reproduced to the canonical reproduction result schema and updates instructions around recorded steps. |
| agents/autowebcompat-repro/hackbot_agents/autowebcompat_repro/config.py | Introduces the Chrome DevTools MCP tool allowlist. |
| agents/autowebcompat-repro/hackbot_agents/autowebcompat_repro/chrome_devtools_mcp.py | Adds a builder for the Chrome DevTools MCP stdio server config. |
| agents/autowebcompat-repro/hackbot_agents/autowebcompat_repro/browser.py | Downloads/unpacks Chrome for Testing and exposes a cached ChromeBrowsers.stable path. |
| agents/autowebcompat-repro/hackbot_agents/autowebcompat_repro/agent.py | Enables Chrome cross-check for the initial nightly reproduction and threads chrome_reproduced into aggregation/output. |
| agents/autowebcompat-repro/Dockerfile | Installs extra OS libraries needed to run headless Chrome in the agent image. |
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jgraham
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Jul 13, 2026
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jgraham
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Some minor fixups, but I don't think this requires more review to land.
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