# Architecture Decision Records

The ADR process is defined in `docs/architecture/35-adr-process.md`.

- **Numbering:** monotonic and global. Never reused.
- **File name:** `ADR-NNNN-slug.md`.
- **Template:** see `TEMPLATE.md` (mirrors ARCH-35 §2 amended template).
- **Lifecycle:** Proposed → Under Review → Approved → Superseded/Deprecated.
- **Immutable at Approval.** Post-approval edits require a new version + change-log entry; significant edits require re-approval (ARCH-35 D-35-2).
- **Retrofit:** ~140 embedded architectural Decisions (D-*) across ARCH-01..ARCH-57 will be converted to numbered ADRs within 30 days of Freeze approval per ARCH-60 R-2 Conditional.

## Approval workflow

Per ARCH-34 §5 decision-rights matrix. Rule of Two applies — no single individual serves as Proposer + Reviewer + Approver for the same ADR.