Billing implements reserve -> commit -> refund against bl_quota and bl_ledger
with row-level locking and idempotency keys; the refund commits on its own
transaction so a failed request cannot silently keep a user's quota. Task
implements the unified task centre over the state machine. Identity issues and
resolves users. Remaining domains are placeholders whose READMEs state what
belongs there and what must not.
DeepSeek (OpenAI-compatible) as primary with a 智谱 GLM slot that is a real
routing path but raises until the 算法备案 model list is confirmed. Adds scene
routing, failover, a per-provider circuit breaker, structured output with
retry-on-validation-failure, prompts loaded by id+version from prompts/, and
cost attribution written to ob_ai_call for every attempt -- successes,
retries and failures alike.
Two controls exist because they are cheap now and expensive later: a
cache-prefix validator that rejects timestamps, uuids and nicknames in the
cached system prefix (a volatile prefix silently multiplies input cost), and
a hard platform-wide daily budget that rejects non-critical scenes instead of
merely alerting, since a retry storm outruns any human on-call.
Typed pydantic-settings config, structlog JSON logging with request/trace id
propagation and redaction of phone numbers, tokens and face keys, the unified
response envelope and error-code table from 架构文档 §9.2, async SQLAlchemy
session management, ORM models for the eight foundation tables, and the
OpenTelemetry/Prometheus wiring.
packages/domain stays pure logic -- snowflake ids, the quota three-phase
protocol and the tk_task state machine -- so it can be tested without a
database and is held to mypy strict.
xsl