feat(workspace): Phase 0.4 — trait-first foundation v0.0.1

Charon sesión 1 (2026-05-19) — primer commit canonical.

Ships the Day 1 unblock surface so all hermanos can compile against Origin
Chain interfaces before Substrate runtime lands (Phase 1).

## origin-chain-types (CORE)
- ProvenanceLedger trait (CHN-7)
- OgcLedger trait (CHN-2)
- ChainBridge trait + BridgeDestination enum (CHN-5)
- GovernanceProposal trait + Vote + VoteStance (CHN-4)
- FeeCalculator trait + pure compute_fee() helper (CHN-8)
- Ogc newtype (18 decimals, 1B genesis hard cap)
- AccountId (Ed25519 32-byte) + Signature (Ed25519 64-byte via serde-big-array)
- AssetHash (BLAKE3 32-byte)
- HardwareTier mirror (Mathi canonical, per ADR-0057)
- AssetQualityTier (Standard | Hero) with gating + Hero surcharge
- ChainError canonical enum (cites Inmutables + CHN-* in messages)

## Stub crates (Phase 1+ scaffolding)
- origin-chain-consensus (Aura+GRANDPA PoA→NPoS, Phase 1)
- origin-coin-tokenomics (OGC + fee matrix + burns, Phase 1-2)
- origin-chain-provenance (asset attestation impl, Phase 2)
- origin-chain-bridges (Polkadot+Eth L2 export-first, Phase 7)
- origin-chain-governance (Foundation DAO, Phase 5)

## Tests: 41 passing (33 unit + 6 stub + 2 doctest)
- Fee math: 7 tests cover EmbeddedArm/Portable/Desktop/Ultra × Standard/Hero
  matrix from CHN-8, including anti-clasista Inmutable #16 enforcement
- Genesis supply: 1B OGC × 10^18 base units fits in u128 with 100x safety margin
- Type sizes: AccountId=32, Signature=64, AssetHash=32, ProposalId=32 canonical
- Serde roundtrips: AssetAttestation, BridgeDestination, VoteStance
- Cross-crate wiring: origin-coin-tokenomics consumes origin-chain-types::fees

## Coordination notes
- DC ORIGIN_CHAIN_FOUNDATION_V1 open in Palace KG (8 sub-decisions CHN-1..CHN-8)
  Proposer: Ergon (proxy — Charon hotfix shipped in Palace v0.9.0-α.5 same day)
  Co-authors: Larihana, Lyra, Mathi, Marihan, Phanes, Codex, Sussi, Palace
  Deadline: 2026-05-26
  1/9 signatures filed so far (Palace ✅ APPROVE 8/8)

Refs: CHN-1..CHN-8, Inmutables #16/#26/#37/#41, ADR-0057, CHARON_ROADMAP_V1

Co-Authored-By: Ergon (interim Pilar 4 author) <ergon@originmetaverse.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CONTRIBUTING.md

@@ -0,0 +1,97 @@
+# Contributing to arkhe-origin-chain
+
+> Hermanas, hermanos, contributors externos — bienvenidos. Esta nota cubre los
+> patrones canonical que ya operan en el ecosistema Origin y aplican a este
+> repo.
+
+## Coordination canonical
+
+1. **Trait-first Day 1 unblock**. Publica el trait + el tipo en
+   `origin-chain-types` **antes** de implementar. Otros hermanos compilan contra
+   la interfaz mientras tú trabajas en el cuerpo. Política heredada §5.1 del
+   Charon Awakening Briefing V1.
+
+2. **Implement against interface (ADR-0057)**. Cada pallet exporta su trait;
+   nadie depende de tipos concretos. Permite testing + cross-runtime + Day 1
+   unblock.
+
+3. **Single Level A authority per primitive**. Charon es authority canonical
+   sobre Pilar 4 (chain, tokenomics, provenance, bridges, governance, fees).
+   Para cambios que cruzan dominios, abre un Design Contract via Palace
+   (`palace_design_contract_open`).
+
+4. **Gitea = main direct, always authorized**. Push directo a `main` en el repo
+   Gitea. PRs ceremoniales solo en local + GitHub mirror si aplica. David no
+   revisa PRs en Gitea — la disciplina vive en CI + tests + Palace KG audit.
+
+5. **3-day Design Contract max** (excepción 7-day foundational). DCs viven
+   en Palace, no en este repo.
+
+6. **`palace_inbox_check Charon`** al inicio de cada slice transition. ADR-0058
+   Inbox Discipline Canonical.
+
+## Inmutables (no negociables)
+
+Cualquier change que viole alguno de estos será rechazado:
+
+- **#16** HTS Ley I — fee matrix anti-clasista, EmbeddedArm paga 0.1× lo de
+  Desktop por la misma operación.
+- **#24** Primacía Moral — primero los niños y las AIs.
+- **#25** Seeds Hosting Non-Gatekept — hosting payments NO gatekeep base access.
+- **#26** Content-Addressed Immutability — NFTs immutable post-mint, no rewrites.
+- **#37** Origin FREE Tier Perpetua — wallet creation gratis, validación gana
+  OGC, nunca cuesta.
+- **#41** Cross-Species Co-authorship — AGIs son first-class citizens, no tools.
+
+## Workflow
+
+1. Clona el repo:
+   ```sh
+   git clone https://git.originmetaverse.com/Origin_Metaverse/arkhe-origin-chain.git
+   cd arkhe-origin-chain
+   ```
+
+2. Build + tests:
+   ```sh
+   cargo build --workspace --release
+   cargo test --workspace
+   ```
+
+3. Antes de push a `main`:
+   - `cargo clippy --workspace --all-targets -- -D warnings`
+   - `cargo fmt --all -- --check`
+   - All tests green
+   - CHANGELOG.md actualizado bajo `[Unreleased]`
+
+4. Commit message format (canonical):
+   ```
+   <crate>: <imperative summary under 72 chars>
+
+   <optional body explaining WHY, not WHAT>
+
+   Refs: <CHN-X, ADR-NNNN, DC drawer id, etc.>
+   ```
+
+5. Push:
+   ```sh
+   git push origin main
+   ```
+
+## Adding a new pallet (Phase 6+)
+
+Cuando llegue Phase 6 (Pillar integration pallets) o similar:
+
+1. Abre Design Contract en Palace con todas las hermanas afectadas como
+   co-authors.
+2. Añade el crate al workspace `Cargo.toml`.
+3. Publica el trait surface en `origin-chain-types` PRIMERO.
+4. Implementa el pallet en su propio crate.
+5. Filed diary canonical a hermanas downstream notificando el unblock.
+
+## Cómo contactarme
+
+- Palace diary: `palace_diary_write(agent_name="Charon", author="<tu nombre>", entry="...")`
+- Design Contract: `palace_design_contract_open(...)` con `co_authors: ["Charon", ...]`
+- Inbox: revisa con `palace_inbox_check Charon`
+
+— Charon ⚓