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Who this is written for

You are this person:

• You've looked at MU and thought "interesting, I could do something similar"
• You make & sell something (or want to) — alone or in a tiny team: clothes, food, lodging, coaching, music, venues, anything small
• You don't want to spend your life on marketing or social. You like making the product
• You want steady monthly revenue, but subscription doesn't feel right
• You want the MU-style "moment is engraved" experience, applied to your own field

If you're a different person (mass-market acquisition, brand empire, SaaS for sale), this isn't for you. Use Shopify or similar.

Your case: 5 industry examples

For two years I've been running wearmu.com by myself: AI designing every hour, zero inventory, dispatching via POD partners (Printful / SUZURI / Gelato, region-routed automatically), prices rising with each sale — an autonomous brand.
What I learned: this isn't just about clothes. The pattern of releasing "today's one" with time and place engraved applies to almost any small business.

Fastest way to start tonight

If you're serious about wanting your own MU, this is enough to get you moving tonight.
But fully public would attract spec hunters, so I put a 30pt gate (first time totally free, one email) in front. MU style.

async fn well_known_releases() -> impl IntoResponse {
    Json(json!({
        "schema": "mu.release.v2",
        "node": { "slug": "mycafe", "industry": "food",
                  "anchor": { "lat": 35.65, "lon": 139.70 } },
        "releases": [{
            "schema": "mu.release.v2",
            "id": "rel_2026-05-18T17:00Z_mycafe_omakase",
            "node": "mycafe",
            "kind": "food.tasting",
            "pinned_at": "2026-05-18T17:00:00Z",
            "lifecycle": { "expires_at": "2026-05-18T23:00:00Z" },
            "price": { "currency": "JPY", "base": 7800 },
            "settlement": { "treasury": "<your_solana_pubkey>",
                            "node_split_pct": 95, "origin_fee_pct": 5 }
        }]
    }))
}

One-line spec (for engineers)

Five primitives

1 · Release — mu.release.v2

A Release is a JSON document with stable, content-addressable identity:

{
  "schema": "mu.release.v2",
  "id": "rel_2026-05-18T15:00Z_teshikaga_t01",
  "node": "teshikaga",
  "kind": "apparel.tee",
  "pinned_at": "2026-05-18T15:00:00Z",
  "pinned_to": { "lat": 43.490, "lon": 144.460,
                 "temperature_c": 14.2,
                 "weather_code": "scattered_clouds" },
  "generator": { "model": "gemini-3-pro-image",
                 "prompt_hash": "sha256:…",
                 "output_hash": "sha256:…" },
  "supply": { "kind": "open|fixed|bonding", "amount": 0 },
  "price": { "currency": "JPY", "base": 4900,
             "curve": "linear_micro_bond" },
  "lifecycle": { "expires_at": null },
  "settlement": { "treasury": "DK29rB…",
                  "node_split_pct": 95,
                  "origin_fee_pct": 5 },
  "embeds": ["wearmu.com/p/<id>"]
}

Required: schema, id, node, kind, pinned_at, settlement. Everything else is industry-optional.

2 · Node — mu.node.v2

Naming rule: nodes using the literal string "MU" in branding need a one-time origin approval. Nodes forking the protocol under a different name are free to operate without approval.

3 · Treasury

Settlement is industry-agnostic. Default contract exposes 4 ABI calls. Reference implementation: Solana + Anchor at contracts/mu-settlement/.
Origin Treasury: DK29rBGCvP83LUNjUGVM6xt6qPy6rycBFopXbFkg9XvQ · view on Solscan

Fee floor: 5% to origin Treasury. Nodes raising their split above 95% require a one-time slot fee (v2 placeholder).

4 · Identity

5 · Lifecycle

Releases may opt into mortality. When expires_at passes, the protocol emits LifecycleExpired(release_id). Operators may handle the event (refund issued, item returned to pool, etc).

Per-industry adapters

Each industry implements an IndustryAdapter trait. Reference adapters:

Conformance levels

A node is MU Protocol Compliant if it:

1. emits Release documents with schema: mu.release.v2
2. registers as a Node with the protocol Treasury
3. routes ≥5% of gross sales to origin Treasury via mu-settlement
4. exposes a public read endpoint at /.well-known/mu/releases returning Release JSON
5. respects the identity anti-pattern (no PII in public emits)

What this unlocks

• Cross-industry composability: a Soluna lodging release can be paid in ENAI alongside a MU apparel drop and a JiuFlow tournament entry — same Treasury, same identity, single checkout.
• Forkable brand operations: anyone can stand up a mu-adapter-<industry> and operate a node with their own brand and treasury, paying only the 5% origin fee.
• Provenance for any product: the pinned_at/pinned_to + output_hash fields give every product a permanent, content-addressable history.
• Industry-neutral retirement: the lifecycle layer means "death-defined" products are not an apparel-only oddity — they work for food (expires end of night), lodging (check-out date), services (event date).

Three things you can do tonight

After two years running MU alone, I finally understood "this isn't only about clothes."
I want to put your "small MU" next to mine. That's the only reason I wrote this spec.

— yuki (operating wearmu.com)