Verify the native helper's sealed identifier and pinned Apple signing team in BridgeLauncher, then carry that provenance to HopperClient. Only a verified native helper's complete not-found exit confirms no document handoff, allowing runtime and target-lease cleanup and retry; wrappers retain unknown document state.
Share publisher identity with setup through the domain contract. Correct fixture teardown ordering and parameterized MCP coverage. Validation: 54 focused tests passed across boundary, CLI, MCP acceptance, diagnostics and installer coverage (one Linux-only case skipped); check:fast passed. Real codesign verification accepted the installed official Hopper helper; Spotlight failures and bridge recovery used process fixtures.
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