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ci.yml: this branch's check-harness-lock --allow-network step is kept, ahead of main's nix-build clippy and test steps that #228's merge brought in. test-evidence/tooling.md: both EOF appends kept, no heading lost (42 = union). Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01VdfEGXA7aJ6ftMsCc9PJze