The canonical Stream 0 board must be machine-checkable before Ultragoal can checkpoint G001, so the generated board and validation wrapper now share the same rich board schema and Markdown renderer.
Constraint: G001 requires .omx/cc2/board.json and .omx/cc2/board.md to prove all frozen ROADMAP.md headings and ordered actions are mapped.
Rejected: Relying on worker-reported validation alone | leader-side validation found schema drift between the status-only and lifecycle_status board entrypoints.
Confidence: high
Scope-risk: narrow
Directive: Keep scripts/generate_cc2_board.py, scripts/validate_cc2_board.py, scripts/cc2_board.py, and .omx/cc2/render_board_md.py aligned on board schema changes.
Tested: python3 scripts/generate_cc2_board.py; python3 scripts/validate_cc2_board.py; python3 scripts/cc2_board.py validate; python3 .omx/cc2/validate_issue_parity_intake.py; python3 .omx/cc2/render_board_md.py .omx/cc2/board.json .omx/cc2/board.md --check; python3 -m py_compile scripts/generate_cc2_board.py scripts/validate_cc2_board.py scripts/cc2_board.py .omx/cc2/validate_issue_parity_intake.py .omx/cc2/render_board_md.py; cargo check --manifest-path rust/Cargo.toml --workspace.
Not-tested: Full cargo test workspace has unrelated existing failures reported by workers in session lifecycle/permission-mode tests.
Co-authored-by: OmX <omx@oh-my-codex.dev>
