The service follows the V4 Trader documents under /Users/zach/Desktop/app/trader. P0 only allows REPLAY_SIM and SHADOW; PAPER, REAL, real fills, and old strategy-service contracts are rejected.

Implemented Surface

Spring Boot service under com.quantai.trader
strict P0 runtime guard for run mode, execution mode, and trading switch
JSON artifact loader for model bundle manifest, PM config manifest, and model output policy
five-model output contract: Direction, Entry, Continue, Exit, Risk
dynamic PM sizing with side-aware stop/target price calculation
Risk Gate for hard blockers and forced close decisions
JDBC persistence for run, cycle, model output, PM decision, risk decision, action, evidence, and outbox
Flyway V1 schema for the V4 P0 tables
health, replay-cycle, and feedback endpoints
JaCoCo line coverage gate at 90%

Local Database

Default configuration:

jdbc:mysql://127.0.0.1:3306/quant_trader
username: quant_trader
password: quant_trader

Override with TRADER_DB_URL, TRADER_DB_USERNAME, and TRADER_DB_PASSWORD.

Artifact Root

Default artifact root:

/Users/zach/Desktop/quant-strategy-training-data/trader-v4/artifact_bundle

Required files:

manifests/model_bundle_manifest.json
manifests/position_manager_manifest.json
model_output_policy.json

The loader requires the configured model/calibration/PM version triple to match the manifests, all five model families to be present, and the model/PM manifests to be ACTIVE.

Commands

mvn clean test
TRADER_DB_USERNAME=quant_trader TRADER_DB_PASSWORD=quant_trader SERVER_PORT=18080 mvn spring-boot:run

HTTP

GET  /api/trader/health
POST /api/trader/replay/cycles
POST /api/trader/feedback

/api/trader/feedback is disabled by default in P0 and still rejects PAPER_APP, REAL_APP, and any real fill when explicitly enabled for tests.