P1 complete. Docs lexicon firewall (lexicon_meta_docs_test.go, 5 tests incl. G-013 walk-coverage + G-014 shared self-test). MkDocs Material scaffold with 26-page nav (G-011). README.md + docs/index.md + 7 docs/shared/ pages. Both firewalls green, go test ./... 22 packages green, no regression. ---ci--- project: oy phase: 1 milestone: v0.3 status: complete tag_base: v0.2.x phase_role: execution requirements: covered: [REQ-028] partial: [REQ-027] ---/ci---
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Bread scale
The unit of value in OpenYield is Bread (REQ-013). Bread is scaled in 11 tiers, each 1,000× the previous, so a Holder can reason about a Crumb and a Granary in the same mental model:
| Tier | Name | Multiple |
|---|---|---|
| 1 | Grain | 1 |
| 2 | Crumb | 1,000 Grain |
| 3 | Bread | 1,000 Crumb |
| 4 | Loaf | 1,000 Bread |
| 5 | Batch | 1,000 Loaf |
| 6 | Cake | 1,000 Batch |
| 7 | Bakery | 1,000 Cake |
| 8 | Granary | 1,000 Bakery |
| 9 | Mill | 1,000 Granary |
| 10 | Harvest | 1,000 Mill |
| 11 | Earth | 1,000 Harvest |
Why 11 tiers
The 11-tier scale gives the mesh a single unit for everything from a 1-Grain internal minimum (the Fee Covenant floor) to the Earth-tier totals held in the Root-Pool. There is no separate "small unit" and "large unit": the Bread scale is the unit. The 1-Grain minimum prevents dust games; the tier names keep human-readable values at every scale.
Where Bread lives
Bread is held in the three Storage Pools: the Stash (Holder-level), the Vault (Stand-level), and the Root-Pool (treasury). The Watchers attest to the state of the pools daily; the Mirror mirrors the canonical state to the bearers. See Watchers & Mirror for the attestation layer.