Encourage accessibility snapshots in Playwright results - #169
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Summary
execute_playwright_codeinput description to ask every invocation for useful page stateariaSnapshot()after navigation and interactionWhy
Browser agents need the result of each Playwright call to decide the next action. Explicitly returning a compact accessibility snapshot keeps that state useful without producing a full-page payload.
This is intentionally separated from #162 so the ClawBench workflow can benchmark this description-only change against its base SHA.
Replay
Watch the successful Kernel MCP ClawBench replay for
v2-1202-beauty-cart-quantity-theordinaryat 4× speed.The task requires the agent to find Multi-Peptide + HA Serum, open the correct product, change its quantity to
2, and add it to the cart. ClawBench intercepted the resultingCart-AddProductrequest and the strict judge verified that it contained the correct product and quantity. The run scored1.0for interception and strict reward.This run exposed only Kernel MCP
execute_playwright_codeto Codex with GPT-5.6 Luna. Its source was the exact description-change commit37273e3, and the trajectory usedariaSnapshot()in 11 browser calls. The published 51-second replay contains no credentials, signed Kernel URLs, session IDs, or private benchmark artifacts.Test plan
bun test src/lib/mcp/register.test.tsbunx tsc --noEmitbunx prettier --check src/lib/mcp/tools/playwright.ts