Test matchers

Experimental Vitest/Jest TraceContract matchers (canonical details on Trace contracts).

Experimental Vitest and Jest TraceContract matchers (toPassTraceContract, toHaveRequiredTool) ship in @agent-inspect/vitest and @agent-inspect/jest.

See the matcher section on the canonical Trace contracts page (TRACE-CONTRACTS.md). This route no longer duplicates that body.

Full reference remains in GitHub docs during the docs migration.