--- name: "wow-client" description: "Write TypeScript code that calls Wow V10 services: clients generated from the service's Manifest with wow-generator, @ahoo-wang/wow-client commands with wait plans, state reads, snapshot/events/dataset queries and the filter and aggregation DSL, exact numbers, problem+json errors, CoSec, @ahoo-wang/wow-react hooks. Exclude Kotlin/Java services, view-engine definitions and hosts, 9.x client migration (wow-migrate), and developing these packages inside the Wow repository." --- # wow-client The job: an application written in TypeScript has to send a Wow V10 service commands and read its data, and the code has to keep working as the service's contract changes. The deliverable is application code on the clients `wow-generator` writes from the service's Manifest (or on `@ahoo-wang/wow-client` directly for a route no generated client covers), with the regeneration in CI, and its tests. ## Scope - Downstream TypeScript code that imports `@ahoo-wang/wow-client`, `@ahoo-wang/wow-react` or `@ahoo-wang/wow-generator`, or is asked to call a Wow service. - Not: Kotlin or Java code (`wow-develop`); view definitions and hosts (`wow-view-definition`, `wow-view-host`); answering a data question (`wow-data-query`); an application still on `@ahoo-wang/fetcher-wow`, `@ahoo-wang/fetcher-generator` or the 9.x `@ahoo-wang/wow-client` (`wow-migrate`); the packages themselves inside the Wow repository. ## Workflow 1. **Pin the versions.** The Wow packages release with Wow, from the same tag; keep them on one minor (`save-prefix=~` or exact). `wow-client` must be on the generator's minor. Node `>=22.12.0`, TypeScript 6 or later. Peers: `@ahoo-wang/fetcher` and `@ahoo-wang/fetcher-eventstream`. 2. **Generate from the Manifest** (`references/generate.md`): `wow-generator generate --input --output src/generated`; commit the output with its `.wow-generator.json`, never edit it, and regenerate in CI with `--strict`. 3. **Commands** (`references/commands.md`): the generated `CommandClient`, a wait plan for how far the call goes (`wait.snapshot()` to read your own write), the request id for a safe retry, and `WowProblemError` for every refusal. 4. **Reads** (`references/queries.md`): `StateClient` for one aggregate (`minVersion` after a command), `SnapshotQueryClient` and `EventQueryClient` with the DSL from `@ahoo-wang/wow-client/dsl`, `DatasetClient` for datasets; `describe()` for what the backend admits. 5. **React** (`references/react.md`), **authentication** (`references/auth.md`) when the work needs them. 6. **Verify**: the type check is the first test (the generated types carry the contract); then the application's tests against a stubbed `fetch` or a running service. Report each command with its result. ## Rules that bite - **Exact numbers.** A Manifest field of a Kotlin `Long`, `BigInteger` or `BigDecimal` (format `int64`, `bigint`, `decimal`) is a `string` in the generated types, its digits as the server wrote them; the wire keeps JSON numbers. Generated clients read and write them exactly through `Aggregate.textNumbers` (states, events, command bodies). Pass such a command field as a string (`unitPrice: '10.00'`) and compute with a decimal library, never `Number(...)`. A hand-written client passes `bodyNumbers` itself, or loses digits past 2^53. - **Time zones.** A relative-time filter (`today`, `recentDays`, `beforeToday`, …) without `zoneId` reads its calendar days in UTC on the server; pass `zoneId` (`'Asia/Shanghai'`) for a local day. - **Projected types.** A query written with a literal `projection: { include: [...] }` answers records narrowed to those paths; one built by a factory, or with an exclusion only, answers whole records. - **Errors reject.** Every refused request and every command that did not succeed rejects with `WowProblemError` (`code`, `status`, `violations`, `retry`); switch on `FrameworkErrorCodes` and the domain's codes in the generated `boundedContext.ts`. Retry only as `error.retry` says, with the same request id when it says so; a `wow.wait.timeout` may have committed. - **No identity in paths or bodies.** The service takes the tenant and owner from the caller; `RequestOptions.scope` (`Wow-Scope`) and `space` (`Wow-Space`) only for a caller allowed to act elsewhere. - **Snapshot fields are `state.`** in filters and sorts; system fields (`aggregateId`, `version`, `tags`, …) are at the root. ## References - `references/generate.md`: the generator from a Manifest, what each file holds, regeneration in CI, the OpenAPI path for non-Wow APIs. - `references/commands.md`: command clients, wait plans and streams, request ids and retries, lifecycle commands, errors. - `references/queries.md`: state reads, query clients, the DSL, streams and resumption, descriptors, exact numbers in reads, datasets. - `references/react.md`: the `@ahoo-wang/wow-react` hooks. - `references/auth.md`: CoSec and the Fetcher, scope and space, server-side rendering. Confirm every signature in the installed typings (`node_modules/@ahoo-wang/wow-client/dist/*.d.ts`) at the pinned version before relying on an overload or default. Guides: https://wow.ahoo.me/typescript/ ; reference: https://wow.ahoo.me/reference/typescript/ . ## Related Skills - $wow-develop: the Kotlin/Java service behind the client. - $wow-view-host and $wow-view-definition: views over the same query routes. - $wow-data-query: answering a question from the data instead of writing code. - $wow-migrate: an application moving from 9.x clients.