claude-safari-extension

Use when adding a new MCP tool to Claude in Safari — covers the full workflow from spec through implementation, tests, manifest updates, and PR creation.

Use when the Claude in Safari extension stops working after a code change, build, or Safari restart — specifically when the extension is missing from "Web Extension Background Pages", flashes and disappears, disappears from Safari Settings entirely, or make health fails with timeout.

Use when running the manual regression test suite before merging a PR — covers setup, which sections to always run, known pre-existing failures to skip, and the PR checklist.