# Changelog M4

## Added
- Autonomous build readiness specification.
- M4 sprint board.
- Module build contracts.
- Acceptance test catalog.
- API example response contracts.
- Job lifecycle contract.
- Frontend state and route contracts.
- Backend service IO contracts.
- Model registry seed specification.
- Demo fixture manifest.
- Codex autonomous runbook.
- Codex pass prompts for backend, database, dataset manager, map workspace, AI demo pipelines and QA/QC exports.

## Intent
M4 prepares the repository for long Codex implementation sessions with minimal human intervention.