These numbered records preserve Echo decisions accepted before the repository adopted concept-owned documentation. They remain useful historical evidence, but their numbers are locators only: sequence does not express dependency, supersession, refinement, importance, or current authority.
The archive closed after record 0026 on 2026-08-09. New durable decisions update the semantically named topic, architecture document, specification, invariant, or colocated rationale that owns the concept. The documentation standards define that current contract.
- Do not allocate another numbered record.
- Preserve accepted historical text; add a clear status or relationship note when current documentation supersedes or refines it.
- Record supersession in both the historical record and its new semantic owner.
- Follow explicit descriptive links; never infer a relationship from numbers.
- Keep work state in GitHub issues and pull requests.
Some older records predate the relationship contract and name only a status. When one is materially revisited, add descriptive forward and reverse links without rewriting its original reasoning.
| ADR | Status | Decision |
|---|---|---|
| 0001 | Accepted | Two-plane WARP representation |
| 0002 | Accepted | WARP instances and descended attachments |
| 0003 | Superseded | Historical causality-first ingress and materialization |
| 0004 | Accepted | Dependency injection without global state |
| 0005 | Superseded | Historical deterministic physics proposal |
| 0006 | Superseded | Historical non-determinism enforcement proposal |
| 0007 | Partially superseded | BOAW execution mechanics; ADR 0020 governs storage authority |
| 0008 | Accepted | Worldline runtime model |
| 0009 | Superseded | Historical frontier-relative state-patch transport |
| 0010 | Accepted | Observational seek and administrative rewind |
| 0011 | Partially superseded | Explicit observation mechanics; ADR 0021 governs public optics |
| 0012 | Superseded | Historical repository knowledge model after Method |
| 0013 | Accepted | Echo and Continuum authority boundary |
| 0014 | Accepted | Generated rule authorship and footprint honesty |
| 0015 | Partially superseded | Compiler, registry, provider, and host responsibilities |
| 0016 | Accepted | Causal transport identity and idempotence |
| 0017 | Accepted | Canonical little-endian binary boundary |
| 0018 | Accepted | Sessions as causal contexts |
| 0019 | Accepted | Bunny owns reusable geometry |
| 0020 | Accepted | Retained reading storage and proof boundary |
| 0021 | Accepted | Public WARP optic over internal observation |
| 0022 | Accepted | Application-requested, Echo-owned anchor admission |
| 0023 | Accepted | Admitted executable operation packages |
| 0024 | Accepted | Anchored-node creation as a separate executable program |
| 0025 | Accepted | Scheduler-owned executable-operation Actions |
| 0026 | Accepted | Request-before-effect and settlement-before-resumption |
ADR 0006 predates this index contract and did not declare a status. Its superseded tombstone preserves that fact without silently ratifying the old implementation proposal.