Playwright CLI — live browser automation

Wraps Microsoft's @playwright/cli for token-efficient browser automation. Snapshots and screenshots write to disk; only paths come back into context — roughly a 4x token reduction versus Playwright MCP (27K vs 114K per workflow in upstream's measurement).

Requires playwright-cli on PATH (npm install -g @playwright/cli). If it is missing, tell the user to install it rather than substituting a different automation surface.

Quick start (90% of use)

playwright-cli kill-all                              # start clean (no stale sessions)
playwright-cli -s=<flow> open <url>                  # named session, headless by default
playwright-cli -s=<flow> snapshot                    # writes YAML with element refs (e1, e2, ...)
playwright-cli -s=<flow> click e42                   # interact by ref
playwright-cli -s=<flow> fill e37 "input" --submit   # fill + press Enter
playwright-cli -s=<flow> screenshot --filename=meaningful-name.png
playwright-cli -s=<flow> console                     # summarize console messages
playwright-cli -s=<flow> close                       # tear down