FIFA 17 sends two different operations to `PUT …/squad/<id>` and distinguishes
them only by body shape. Across 73 captured squad PUTs in five captures there
are exactly two:
* 68x with `players` -- a full replacement (also carrying squadName,
formation, squadType, manager, chemistry/rating, and redundantly
captain/kicktakers);
* 5x without `players` -- `{id, custom, captain, kicktakers}`, emitted by the
captain/kick-taker screen.
`players` has `#[serde(default)]`, so an absent key and an explicit `[]`
collapsed to the same empty vec and every partial update was handed to Core as
a replacement with zero slots. Core's empty-replacement guard refused it (400)
and the host reported 502, losing the user's captain/kick-taker change.
`classify_squad_put` now tests key PRESENCE on the raw JSON before
deserialising, so absence ("the squad was not part of this edit") stays
distinct from an explicit empty array ("replace with nothing"). An explicit
`"players": []` still classifies as a replacement and still meets the guard --
the patch path is not a way around it.
The patch path carries the contract correction: omitted `players`, `manager`
and actives mean UNCHANGED, never cleared. That is structural --
`CoreRolePatchRequest` has no field able to express them. The extension is
MERGED rather than overwritten, because the partial body carries only `custom`
and `kicktakers`; overwriting would drop every kit number in the squad.
`custom` IS taken from the patch, since the role screen writes per-slot values
into it and the two shapes genuinely differ there.
Also fixes the error mapping on this route: a Core 400 means the REQUEST was
invalid, so it is reported as 400, not as a 502 that blames the server and
hides a client error behind "upstream unavailable".
Tests use the real captured body and assert it takes the patch path
(`replace_squad` call count unchanged), that the manager survives, that kit
numbers survive the merge, that an explicit empty `players` still reaches the
replacement path, and that an unresolvable captain refuses the whole patch
rather than half-applying the kick-takers.
openfut-utas-host
The FIFA 17 UTAS migration boundary. It accepts the client-visible HTTP surface, serves migrated routes from Rust/Core plus host-owned durable stores, and proxies only the unclassified tail to the Python behavioral oracle.
FIFA 17 ──HTTP──▶ openfut-utas-host
├── migrated route ──▶ Rust adapter / Core / host stores
└── unclassified tail ──▶ Python UTAS oracle
src/lib.rs::classify is the route-level source of truth. The current Rust surface
includes club/squad/user reads, club rename, auth/session/client data, Store/economy,
packs, owned-item moves, market/trade-pile, and the observed hub support routes.
Safety model
- Classification happens exactly once before execution. There is no "try Rust then Python"; a mutation cannot be double-applied.
- A route classified to Rust never falls back to Python on a Core/store/projection failure. Each handler uses its captured fail-closed or honest-empty wire contract.
PUT …/clubandPUT|POST …/user/clubatomically update the shared account JSON. Every input returns the required zero-atom200 {}response; rejection and persistence failures remain visible in logs.- Numeric
GET …/squad/<n>returns the one Core-backed current squad, matching the Python oracle's single-current-squad behavior. - Python remains the behavioral oracle and rollback backend for routes not yet classified to Rust. New economy behavior belongs in Rust/Core, never Python.
Configuration (env)
| Var | Required | Default | Meaning |
|---|---|---|---|
OPENFUT_UTAS_HOST_ADDR |
yes | — | client-visible host listen address |
OPENFUT_UTAS_PYTHON_URL |
yes | — | Python oracle base for the unclassified tail; must differ from this host |
OPENFUT_FIFA17_CATALOG |
yes | — | FIFA 17 definition identity catalog |
OPENFUT_IDENTITY_STORE |
yes | — | persistent owned-instance ↔ wire-id store |
OPENFUT_PERSONA_ID |
yes | — | non-zero FIFA persona id shared by LSX/Blaze/POW/UTAS |
OPENFUT_MARKET_DB |
yes | — | durable host-owned transfer-market SQLite DB |
OPENFUT_PILE_DB |
yes | — | durable host-owned item-pile SQLite DB |
OPENFUT_CORE_URL |
no | http://127.0.0.1:8080 |
OpenFUT Core base |
OPENFUT_FIFA17_TABLES_DIR |
no | fifa17-recon/data/tables |
FIFA entity tables |
OPENFUT_CLIENTDATA_DB |
no | identity-store sibling clientdata.json |
durable opaque client-data JSON |
OPENFUT_ACCOUNT_PATH |
no | FUT_ACCOUNT_PATH, then identity-store sibling active_account.json |
shared FIFA account/club JSON |
Startup fails if required identity or durable economy state cannot be opened. No placeholder production identity source is substituted.
Identity model (resolved)
FIFA renders an owned card by resolving resourceId & 0xffffff against the
client's own local players table; an invented id renders a blank generic
card (proven live — fut_cards.py:11-21). Two distinct identities, never
conflated, are resolved by [Fifa17IdentityResolver] (the single production path):
- Definition identity (
resourceId/assetId) — the card's real FIFA asset id, from the versionedOPENFUT_FIFA17_CATALOG. An unmapped definition is dropped and counted, never faked. - Instance identity (
id) — a stable, persistent, reversible wire integer from the genericopenfut-identitystore under the FIFA 17 wire-id policy (monotonic from100_000_001). The same owned instance keeps its id across restart and reverses exactly; two copies of one definition share aresourceIdbut get distinctids. The namespace is globally monotonic within(fifa17, owned-item)— no per-account column is needed because Core owned-instance ids are globally-unique UUIDs.
Production has a frozen post-P1 baseline and a hot Python rollback. A source change passing local tests is not deployment approval. Build verification, staging, host restart, and live-client promotion remain operator-gated; the current state and promotion evidence live in the OpenFUT Obsidian vault.
Logs are safe by construction: no auth/session/device/token material — only owner, route, filter summary, counts, status.