CosmicLedger SWARM Architecture
- Focus: MVP of offline-first verifiable ledger for partition-tolerant data sharing.
- Core modules:
  - cosmic_ledger.contracts: Data contract registry with versioning for mission data types.
  - cosmic_ledger.ledger: Local append-only ledger storing entries and signatures.
  - cosmic_ledger.delta: Delta logs with Merkle root support and delta export/import.
  - cosmic_ledger.crypto: Simple signer/verification using HMAC for MVP correctness.

- Data model (MVP):
  - Telemetry, SensorData, Event, Command, Hazard entries with minimal fields.
  - Each entry is cryptographically linked via a signature (node-local signer).
  - Merkle DAG roots enable compact proofs of inclusion for entries in the log.

- Networking (out-of-scope MVP):
  - Delta exchange is simulated via in-process delta export/import.
  - Adapters/connectors to two domains can be added in future iterations.

- Tests & Validation:
  - test.sh drives a minimal cross-node delta replication scenario to validate consistency.
  - AGENTS.md documents intended architectural rules and testing protocol for contributors.

- Contribution rules:
  - Small, well-scoped changes preferred; add tests for new features.
  - Update README/docs to reflect changes and how to use the MVP.