Debug ONE failing shaka-perf test at ONE viewport by attaching to its live browser — no MCP, no install. `shaka-perf troubleshoot` freezes the visreg + perf browsers open on the failing page; its own subcommands attach over CDP to inspect them. Use whenever a visreg mismatch or perf run needs eyes on the actual page — "why is this test failing", "look at the live page", "debug this abtest", "attach to the troubleshoot browser", "inspect the control vs experiment DOM".
shakacode npx skillmds@latest add shakacode/troubleshoot-abtest shaka-perf troubleshoot runs one test at one viewport and leaves its visreg + perf browsers
frozen open on the failing page. Attach and inspect with its own subcommands over CDP — no MCP.
Run shaka-perf troubleshoot --help — it documents the whole loop (launch → session →
eval / html / shot / console → kill) and the per-command flags. Follow it.
shakacode/shakaperf/tree/main/.claude/skills/troubleshoot-abtest commit d993bd4847