diff --git a/packages/effect-view/AGENTS.md b/packages/effect-view/AGENTS.md
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+++ b/packages/effect-view/AGENTS.md
@@ -0,0 +1,53 @@
+# effect-view
+
+`effect-view` lets a React function component be described as an Effect program: yield services, create scoped resources, subscribe to reactive state, and turn Effects into React callbacks inside a component body, then convert that description into a normal React function component at a React boundary.
+
+Requires Effect v4 (RC) and React 19.2+. Peer dependencies: `effect`, `react`, `@types/react`. Not tied to `react-dom` — any React renderer works.
+
+When writing effect-view code, use the actual current source and tests in `src/` as ground truth over anything remembered from training — the API is pre-1.0 and still moving. The files below are a concise reference; read the linked one(s) before writing code that touches that concern.
+
+## Core model
+
+1. `ReactRuntime` builds the Effect services available to the UI and exposes them through React context.
+2. `Component.make` defines a component body as an Effect generator.
+3. `Component.withContext` converts a `Component` into a normal React component at a React boundary (app root, router, third-party library). Apply it only there — never between two effect-view components.
+4. Inside another effect-view component, compose children by yielding their `.use` Effect.
+5. Every rendered component instance owns a root `Scope.Scope`, opened on mount and closed on unmount; regular component setup must complete **synchronously** during render unless the component is wrapped with `Async.async`.
+
+## Find the right doc by what you're trying to do
+
+**Setting up the app** — building the runtime, providing it to the tree → [ReactRuntime.md](./ai-docs/ReactRuntime.md)
+
+**Defining a component, its lifecycle, or running Effects from event handlers** → [Component.md](./ai-docs/Component.md)
+
+**Storing, reading, or subscribing to state** (local, shared via a service, or focused into a nested field) → [State.md](./ai-docs/State.md) — `Lens` (read/write) and `View` (read-only)
+
+**Rendering something that needs to wait on an async Effect, or avoiding unnecessary re-renders/re-fetches** → [Async.md](./ai-docs/Async.md) — `Async` (suspend on an Effect) and `Memoized` (`React.memo` wrapper)
+
+**Fetching/caching server data** (reactive keys, staleness, background refresh, invalidation) → [Query.md](./ai-docs/Query.md) — includes `QueryClient`, the cache service `Query` runs against
+
+**Triggering a write** (save, delete, upload, send) with pending/error state → [Mutation.md](./ai-docs/Mutation.md)
+
+**Building a schema-driven form**:
+- shared concepts (encoded vs decoded value, focusing into fields, input/status hooks) → [Form.md](./ai-docs/Form.md) — read this first
+- a form that submits a valid value via a `Mutation` → [MutationForm.md](./ai-docs/MutationForm.md)
+- a form that keeps a target `Lens` continuously synchronized with a valid draft → [LensForm.md](./ai-docs/LensForm.md)
+
+**Small utilities**:
+- bridging React-tracked values into an Effect `PubSub` → [PubSub.md](./ai-docs/PubSub.md)
+- consuming a raw Effect `Stream` as React state → [Stream.md](./ai-docs/Stream.md)
+
+## Choosing between async integrations
+
+- One-off async read before rendering → `Async.async`.
+- Cached/shared/refreshable server reads → `Query`.
+- User-triggered writes with observable pending/error state → `Mutation`.
+- Async work in an event handler with no need for `Mutation` state → `Component.useRunPromise`/`useCallbackPromise`.
+- Subscriptions or background work tied to component lifecycle → a scoped fiber forked from `Component.useReactEffect`.
+
+## Common pitfalls
+
+- Never yield an asynchronous Effect directly from a regular (non-`Async`) component body.
+- effect-view hooks are still React hooks under the hood: call them unconditionally, at the top level, in a stable order — never in branches, loops, or after a suspend point.
+- Keep `ReactRuntime` instances and `Layer` references stable; building them during render creates new resources and a new React context every time.
+- `Component.withContext` requires a matching `ReactRuntime.Provider` above it in the tree.
diff --git a/packages/effect-view/ai-docs/Async.md b/packages/effect-view/ai-docs/Async.md
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+# Async and Memoized
+
+Two `Component` traits that control render behavior: `Async` lets a component's body suspend on an asynchronous Effect; `Memoized` skips re-rendering a component when its props haven't changed. They're commonly combined, since an unmemoized `Async` component restarts its async computation on every unrelated parent render.
+
+## Async
+
+Components run synchronously by default (the body must complete without suspending during render). `Async.async` lifts a component so its body may await an asynchronous Effect before returning JSX; React Suspense handles the wait.
+
+```tsx
+import { Effect } from "effect"
+import { Async, Component } from "effect-view"
+
+export const UserCard = Component.make("UserCard")(function* ({ userId }: { readonly userId: string }) {
+ const user = yield* Component.useOnChange(() => loadUser(userId), [userId])
+ return {user.name}
+}).pipe(Async.async)
+```
+
+Render with a fallback (per-use or as a component default):
+
+```tsx
+const User = yield* UserCard.use
+Loading user...} />
+```
+
+```tsx
+.pipe(Async.async, Async.withOptions({ defaultFallback: Loading user...
}))
+```
+
+Rules:
+
+- **Hook ordering**: place every React hook and effect-view hook helper *before* the first operation that may suspend. After a suspend point, the generator continuation runs outside React's synchronous render phase, so no hooks may follow it.
+- The `promise` prop name is reserved on async components (used internally) — do not declare a prop with that name.
+
+When to reach for `Async` vs alternatives:
+
+- One-off asynchronous read before rendering → `Async.async`.
+- Cached/shared/refreshable server reads → `Query` (see `Query.md`).
+- User-triggered writes with pending/error state → `Mutation` (see `Mutation.md`).
+- Async work in an event handler with no need for `Mutation` state → `useRunPromise`/`useCallbackPromise` (see `Component.md`).
+- Subscriptions or background work tied to lifecycle → a scoped fiber forked from `useReactEffect`.
+
+## Memoized
+
+Wraps a component's rendered function with `React.memo`, so an unrelated parent re-render doesn't re-run the component (or restart an `Async` child's in-flight computation) when props are unchanged.
+
+```tsx
+import { Async, Component, Memoized } from "effect-view"
+
+export const UserCard = Component.make("UserCard")(function* ({ userId }: { readonly userId: string }) {
+ const user = yield* Component.useOnChange(() => loadUser(userId), [userId])
+ return {user.name}
+}).pipe(Async.async, Memoized.memoized)
+```
+
+- Default comparison is `Object.is` per prop (React.memo default), except on `Async` components where `fallback` is excluded from the comparison by default.
+- Override with `Memoized.withOptions({ propsEquivalence })`, e.g. `Equal.asEquivalence()` for full structural equality on immutable data. Supplying `propsEquivalence` replaces the default entirely (so `fallback` is included again for `Async` components unless you exclude it yourself).
+- `Memoized` is not exclusive to `Async` — it applies to any `Component` — but it matters most there, since an unmemoized async child otherwise closes/reopens its dependency scope and re-runs its async setup on every parent render.
diff --git a/packages/effect-view/ai-docs/Component.md b/packages/effect-view/ai-docs/Component.md
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+# Component
+
+Defines a React function component as an Effect program. A `Component` is a description, not yet a React component — cross into React with `Component.withContext` or `.use`.
+
+## Define
+
+```tsx
+import { Effect } from "effect"
+import { Component } from "effect-view"
+
+export const HelloView = Component.make("HelloView")(function* (props: { readonly name: string }) {
+ const message = yield* Effect.succeed(`Hello, ${props.name}`)
+ return {message}
+})
+```
+
+- `Component.make(spanName?)(generatorBody, ...pipeArgs)` — same overloads as `Effect.fn`/`Effect.gen`: a generator body, or a body plus `(_, props) => next` pipeline steps. Passing a `spanName` wraps the body in a tracing span and sets `displayName`.
+- `Component.makeUntraced` is identical but skips the automatic span (still sets `displayName` from the name argument).
+- The component's props type, return type, error channel, and required services (`R`) are all inferred from the generator body.
+
+## Cross into React
+
+```tsx
+export const Hello = HelloView.pipe(Component.withContext(runtime.context))
+// >` that binds the child to the current Effect context/scope and returns a stable function-component reference. Yield it from a parent component body; do not call `withContext` here.
+
+## Lifecycle hooks
+
+Hooks are plain React hooks under the hood: call them unconditionally, at the top level, in the same order every render — never in branches, loops, callbacks, or after a suspend point.
+
+Every rendered component instance gets a root `Scope.Scope`, created on mount and closed on unmount, provided to the whole body. `Effect.addFinalizer`, `Effect.acquireRelease`, `Effect.forkScoped` used directly in the body run against this scope.
+
+| Hook | Purpose | Scope | Closes |
+|---|---|---|---|
+| body | produce rendered output | component root scope | unmount |
+| `useOnMount(() => effect)` | compute + cache once | component root scope | unmount |
+| `useOnChange(() => effect, deps)` | recompute on deps change | new scope per dep set | deps change / unmount |
+| `useReactEffect(() => effect, deps?)` | post-commit side effect (`Effect.useEffect` analog) | new scope | deps change / unmount |
+| `useReactLayoutEffect(() => effect, deps?)` | pre-paint side effect | new scope | deps change / unmount |
+| `useLayer(layer, options?)` | build + provide a `Layer`, returns its `Context` | new scope tied to layer identity | layer ref changes / unmount |
+
+```tsx
+const state = yield* Component.useOnMount(() =>
+ Effect.gen(function* () {
+ yield* Effect.addFinalizer(() => Effect.log("disposed"))
+ return Lens.fromSubscriptionRef(yield* SubscriptionRef.make(0))
+ }),
+)
+```
+
+- Setup passed to `useOnMount`/`useOnChange`/`useLayer` must complete **synchronously** in a regular component (it runs during render). Wrap the component with `Async.async` to allow suspending setup.
+- `useReactEffect`/`useReactLayoutEffect` setup must also start synchronously but may `Effect.forkScoped` async work into the hook's own scope.
+- `useRunSync`/`useRunPromise`/`useCallbackSync`/`useCallbackPromise` do not create a new scope; they capture the component root scope (and any extra services you request) by default.
+
+## Run Effects from event handlers
+
+```tsx
+const runPromise = yield* Component.useRunPromise() // or useRunPromise()
+ void runPromise(saveUser(user))}>Save
+```
+
+- `useRunSync()` — only for Effects guaranteed to complete synchronously.
+- `useRunPromise()` — for Effects that may suspend/sleep/fetch.
+- `useCallbackSync(f, deps)` / `useCallbackPromise(f, deps)` — memoized variants (same deps semantics as `React.useCallback`) for passing stable callbacks to children.
+- Both runners provide `Scope.Scope` automatically; add extra services with an explicit type argument (`useRunPromise()`).
+
+## Provide services
+
+Static layer, one instance per mounted component, disposed on unmount:
+
+```tsx
+const GreetingViewLive = GreetingView.pipe(Component.provide(GreetingService.layer))
+```
+
+Layer built from render-time state (props/context), provided to children explicitly:
+
+```tsx
+const layer = React.useMemo(() => Layer.succeed(GreetingService, {...}), [props.greeting])
+const context = yield* Component.useLayer(layer)
+const Greeting = yield* Effect.provide(GreetingView.use, context)
+return `; `None` until decoding succeeds |
+| `issues` | Standard Schema issues scoped to this form's path |
+| `isValidating` | whether schema decoding is currently running |
+| `canCommit` | whether the root has a valid value and is ready to commit |
+| `isCommitting` | whether a mutation or target write is in progress |
+
+There is no separate "field" type — a field is just a `Form` focused on part of its parent.
+
+## Focus into subforms
+
+```tsx
+const displayNameField = Form.focusObjectOn(form, "displayName")
+const contactForm = Form.focusObjectOn(form, "contact")
+const emailField = form.pipe(Form.focusObjectOn("contact"), Form.focusObjectOn("email"))
+```
+
+- `Form.focusObjectOn` (struct key), `Form.focusArrayAt` (array index), `Form.focusTupleAt` (tuple index), `Form.focusChunkAt` (Chunk index). All are dual API: data-first, or curried for chaining through nested paths with `pipe`.
+- A focused form exposes `encodedValue`/`value`/`issues` scoped to that path; `isValidating`/`canCommit`/`isCommitting` stay connected to the root form.
+- Focus once (e.g. at component setup), not on every render.
+
+## Bind a subform to an input
+
+```tsx
+const input = yield* Form.useInput(emailField, { debounce: "250 millis" })
+`: returns `{ value, setValue, enabled, setEnabled }` for a togglable optional input. `value`/`setValue` operate on the unwrapped `I`; `defaultValue` is used as `value` while `enabled` is `false` (i.e. while the encoded field is `None`), and `defaultValue` is required.
+- `Form.useStatus(form, { debounce? })` returns `{ isValidating, isCommitting, canCommit }`, debounced (default 250ms) to avoid flicker in pending indicators.
+
+These hooks are building blocks for your own reusable input components — wrap them once to handle labels, issues, disabled state, and styling consistently; both hooks accept any `Form.Form`, so the same input component works with subforms from `MutationForm` or `LensForm`.
+
+## Schema-owned conversions
+
+Because the schema defines both directions, it can own an entire domain conversion — e.g. a local `datetime-local` input string decoding to a UTC `DateTime.Utc` and back — with no manual parsing in components. See `MutationForm.md` for a complete example (`DateTimeUtcFromZonedInput`).
diff --git a/packages/effect-view/ai-docs/LensForm.md b/packages/effect-view/ai-docs/LensForm.md
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+++ b/packages/effect-view/ai-docs/LensForm.md
@@ -0,0 +1,25 @@
+# LensForm
+
+A root form (implements `Form.Form`, see `Form.md`) that keeps an encoded draft synchronized in both directions with a target `Lens` of decoded application data. Use for settings panels, inspectors, and edit screens where a valid change should update existing state without a final submit.
+
+```tsx
+import { Effect, SubscriptionRef } from "effect"
+import { Component, Lens, LensForm, View } from "effect-view"
+
+const [form, profile] = yield* Component.useOnMount(() =>
+ Effect.gen(function* () {
+ const profile = Lens.fromSubscriptionRef(
+ yield* SubscriptionRef.make({ displayName: "Ada", age: 37, contact: { email: "ada@example.com" } }),
+ )
+ const form = yield* LensForm.make({ schema: ProfileSchema, target: profile }).pipe(LensForm.thenRun)
+ return [form, profile] as const
+ }),
+)
+
+const [savedProfile, isCommitting] = yield* View.useAll([profile, form.isCommitting])
+```
+
+- `LensForm.make({ schema, target, initialEncodedValue? })` — `target` holds decoded data. `LensForm.thenRun` starts synchronization.
+- A valid edit is decoded and written to `target` automatically; an invalid edit stays in the form (so the user can correct it) and never reaches `target`. If something else updates `target`, `LensForm` encodes that value back into the draft.
+- Pass `initialEncodedValue` only when the first draft should differ from the encoded target; otherwise `LensForm.make` derives the initial draft by encoding the current target through the schema.
+- No `submit` method — commits happen continuously as valid edits arrive. Focus into subforms/fields with `Form.focusObjectOn`/etc. and bind with `Form.useInput` exactly as with `MutationForm` (see `Form.md`).
diff --git a/packages/effect-view/ai-docs/Mutation.md b/packages/effect-view/ai-docs/Mutation.md
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--- /dev/null
+++ b/packages/effect-view/ai-docs/Mutation.md
@@ -0,0 +1,89 @@
+# Mutation
+
+effect-view's counterpart to TanStack Query mutations: user-triggered asynchronous work (save, delete, upload, send) as an Effect. No cache, no reactive key, no automatic execution — it runs only when called.
+
+| TanStack Mutation | effect-view |
+|---|---|
+| mutation variables | the input key `K` |
+| `mutationFn` | `f: (key: K) => Effect` |
+| mutation result | `mutation.state`, a `View<{ key: Option; result: AsyncResult }>` |
+| `isPending` | `state.result.waiting` |
+| `mutateAsync` | `mutation.mutate(key)` |
+| start without awaiting | `mutation.mutateView(key)` |
+
+## Create
+
+```tsx
+import { Mutation } from "effect-view"
+
+const mutation = yield* Component.useOnMount(() =>
+ Mutation.make({ f: (input: InviteInput) => sendInvite(input) }),
+)
+```
+
+`Mutation.make({ f })` is an Effect constructor, not a hook — create each instance once (`Component.useOnMount` for component-owned, an Effect service for shared) and keep it stable. `f` keeps its full `Effect` type; required services are captured from the creation context, so callbacks don't reconstruct dependencies. Fibers belong to the creation scope and are interrupted if that scope closes while running.
+
+## AsyncResult state
+
+`mutation.state` is a `View` of `{ key: Option, result: AsyncResult }`. `result` starts `Initial` (`waiting: false`); calling `mutate`/`mutateView` sets `waiting: true`, then publishes `Success` or `Failure`. Match on `state.result`, not `state` itself:
+
+```tsx
+import { AsyncResult } from "effect/unstable/reactivity"
+
+const [state] = yield* View.useAll([mutation.state])
+
+AsyncResult.match(state.result, {
+ onInitial: ({ waiting }) => (...),
+ onFailure: ({ cause, previousSuccess, waiting }) => (...), // cause: Cause
+ onSuccess: ({ value, waiting }) => (...),
+})
+```
+
+`waiting` is independent of the result tag: after one success, starting another call keeps the value visible while `waiting: true`; if that call fails, the failure can retain `previousSuccess`. Failures carry a full `Cause`.
+
+## mutate vs mutateView
+
+| Method | Returns | Use for |
+|---|---|---|
+| `mutate(key)` | the final `FinalMutationState` (`{ key: Option.Some, result: Success \| Failure }`) | an Effect workflow that needs the outcome |
+| `mutateView(key)` | a live per-call `View<{ key: Option.Some, result: AsyncResult }>` | a UI callback that just starts the work |
+
+```tsx
+const runPromise = yield* Component.useRunPromise()
+void runPromise(Effect.gen(function* () {
+ const final = yield* mutation.mutate(input)
+ if (AsyncResult.isSuccess(final.result)) yield* Effect.log(`Saved ${final.result.value.id}`)
+}))
+```
+
+```tsx
+const runSync = yield* Component.useRunSync()
+const state = runSync(mutation.mutateView(input)) // a View for this specific call
+```
+
+The mutation Effect never fails with `E` itself — it captures the operation's `Exit` and always resolves to a final state wrapping an `AsyncResult.Success`/`Failure`.
+
+## Reactive metadata
+
+| Member | Meaning |
+|---|---|
+| `state` | latest mutation state, shared `View` |
+| `latestKey` | most recent input, `Option` |
+| `latestFinalState` | latest completed final state, `Option>` |
+| `fiber` | most recently started mutation fiber, `Option` |
+
+## Concurrency
+
+Starting a mutation does not interrupt an earlier one — calls can overlap, each with its own `mutateView` state; `mutation.state` reflects whichever update arrived last. For a single submit button, disabling while `result.waiting` is usually enough. Use per-call `mutateView` Views (e.g. per uploaded file) when concurrent operations each need their own progress indicator.
+
+## Updating queries after a mutation
+
+Mutations never auto-invalidate `Query` caches — compose it explicitly:
+
+```tsx
+const final = yield* updatePost.mutate(input)
+if (AsyncResult.isSuccess(final.result)) {
+ yield* posts.invalidateCacheEntry(["post", final.result.value.id] as const)
+ yield* posts.refreshView // invalidation alone does not refetch
+}
+```
diff --git a/packages/effect-view/ai-docs/MutationForm.md b/packages/effect-view/ai-docs/MutationForm.md
new file mode 100644
index 0000000..1af1d82
--- /dev/null
+++ b/packages/effect-view/ai-docs/MutationForm.md
@@ -0,0 +1,51 @@
+# MutationForm
+
+A root form (implements `Form.Form`, see `Form.md`) that owns a local encoded draft and passes the valid decoded value to a `Mutation` when `submit` runs. Use for registration, checkout, search — any workflow with an explicit submit action.
+
+```tsx
+import { Effect } from "effect"
+import { Component, MutationForm, View } from "effect-view"
+
+const form = yield* Component.useOnMount(() =>
+ MutationForm.make({
+ schema: ProfileSchema,
+ initialEncodedValue: { displayName: "", age: "", contact: { email: "" } },
+ f: ([profile, form]) => Effect.log(`Creating ${profile.displayName}, age ${profile.age}`),
+ }).pipe(MutationForm.thenRun),
+)
+
+const [canCommit, isCommitting] = yield* View.useAll([form.canCommit, form.isCommitting])
+const runPromise = yield* Component.useRunPromise()
+
+ void runPromise(form.submit)}>
+ {isCommitting ? "Creating..." : "Create profile"}
+
+```
+
+- `MutationForm.make({ schema, initialEncodedValue, f })` constructs the form; the underlying `Mutation`'s input key is the tuple `[decodedValue, form]`, not just the decoded value. Most `f` implementations only destructure the first element (`profile.age` is a number even though the input edited a string); `form` is included so `f` can, if needed, read other form state (e.g. `form.issues`, `form.encodedValue`) while handling the submission. `MutationForm.thenRun` starts initial validation in the current scope.
+- Create once and keep stable — the usual home is `Component.useOnMount`.
+- `form.submit` runs the mutation only when the form can currently commit; schema issues block submission before the mutation ever runs.
+- Focus into subforms/fields with `Form.focusObjectOn`/`focusArrayAt`/etc. (see `Form.md`) and bind them to inputs with `Form.useInput`.
+- If `f` fails with a `Schema.SchemaError`, `form.submit` formats that error into `form.issues` automatically — the same formatting path used for client-side decoding errors — instead of only surfacing it as a mutation failure. Any other failure from `f` is left as the mutation's `Failure` and does not touch `form.issues`.
+
+## Example: schema-owned date conversion
+
+```tsx
+class DateTimeUtcFromZoned extends Schema.transformOrFail(Schema.DateTimeZonedFromSelf, Schema.DateTimeUtcFromSelf, {
+ strict: true,
+ decode: input => ParseResult.succeed(DateTime.toUtc(input)),
+ encode: DateTime.setZoneCurrent,
+}) {}
+
+export class DateTimeUtcFromZonedInput extends Schema.transformOrFail(Schema.String, DateTimeUtcFromZoned, {
+ strict: true,
+ decode: (input, _options, ast) => Effect.flatMap(DateTime.CurrentTimeZone, timeZone =>
+ Option.match(DateTime.makeZoned(input, { timeZone, adjustForTimeZone: true }), {
+ onSome: ParseResult.succeed,
+ onNone: () => ParseResult.fail(new ParseResult.Type(ast, input, "Enter a valid date and time")),
+ })),
+ encode: value => ParseResult.succeed(DateTime.formatIsoZoned(value).slice(0, 16)),
+}) {}
+```
+
+An `(), PubSub.shutdown))
+```
+
+`PubSub.useFromReactiveValues(values: DependencyList)` creates a scoped, unbounded `PubSub` on mount and publishes `values` to it every time the dependency array changes (skipping publish once the PubSub has been shut down). Useful for bridging a set of React-tracked reactive values into an Effect `Stream`-based consumer inside the component's scope.
diff --git a/packages/effect-view/ai-docs/Query.md b/packages/effect-view/ai-docs/Query.md
new file mode 100644
index 0000000..318c797
--- /dev/null
+++ b/packages/effect-view/ai-docs/Query.md
@@ -0,0 +1,118 @@
+# Query
+
+effect-view's take on TanStack Query: reactive query keys, cached results, stale times, background refresh, window-focus refetching, cache invalidation — but the query function is an `Effect` and the observable state is a `View` (see `State.md`).
+
+| TanStack Query | effect-view |
+|---|---|
+| `QueryClient` | the `QueryClient` Effect service (below) |
+| `queryKey` | a reactive key supplied as a `View` |
+| `queryFn` | `f: (key: K) => Effect` |
+| `useQuery` result | `query.state`, a `View>` |
+| `isFetching` | `result.waiting` |
+| `refetch` | `query.refresh` / `query.refreshView` |
+| `invalidateQueries` | `query.invalidateCache` / `invalidateCacheEntry` |
+
+## QueryClient: the shared cache
+
+Every `Query` reads and writes through a `QueryClient`, the Effect service that owns the cache and its garbage collection. Add it once to the application runtime:
+
+```tsx
+import { Layer } from "effect"
+import { QueryClient, ReactRuntime } from "effect-view"
+
+const AppLive = Layer.empty.pipe(
+ Layer.provideMerge(QueryClient.layer({
+ defaultStaleTime: "30 seconds", // default: "0 minutes"
+ defaultRefreshOnWindowFocus: true, // default: true
+ cacheGcTime: "5 minutes", // default: "5 minutes"
+ })),
+)
+export const runtime = ReactRuntime.make(AppLive)
+```
+
+`QueryClient.layer(options?)` builds the service and forks its background garbage-collection loop into the layer's scope. Individual queries may override `staleTime`/`refreshOnWindowFocus`; unset options fall back to these client defaults. `cacheGcTime` controls how long a stale, unaccessed cache entry is kept before eviction. You interact with the client only indirectly through `Query` instances — no need to call `QueryClientService` methods directly.
+
+## Create and run a query
+
+```tsx
+import { Effect, Schema, SubscriptionRef } from "effect"
+import { HttpClient } from "effect/unstable/http"
+import { Component, Lens, Query, View } from "effect-view"
+
+const [postId, query] = yield* Component.useOnMount(() =>
+ Effect.gen(function* () {
+ const key = Lens.fromSubscriptionRef(yield* SubscriptionRef.make(["post", 1 as number] as const))
+
+ const query = yield* Query.make({
+ key,
+ staleTime: "1 minute",
+ f: ([, id]) =>
+ HttpClient.HttpClient.pipe(
+ Effect.andThen(client => client.get(`https://example.com/posts/${id}`)),
+ Effect.andThen(res => res.json),
+ Effect.andThen(Schema.decodeUnknownEffect(Post)),
+ ),
+ }).pipe(Query.thenRun)
+
+ return [Lens.focusTupleAt(key, 1), query] as const
+ }),
+)
+```
+
+- `Query.make({ key, f, staleTime?, refreshOnWindowFocus?, keyEquivalence? })` constructs the query; `Query.thenRun` starts watching `key` in the current scope.
+- Create each query once and keep it stable — the usual home is `Component.useOnMount` (component-owned) or an Effect service (shared across components). Change the key, don't recreate the query, when input changes.
+- Keys use Effect equality by default (`keyEquivalence` overrides it). A tuple key plays the same role as `['post', id]` in TanStack Query.
+- `f` keeps its full `Effect` type: required services, schema decoding, retries, tracing all compose normally. The context is captured at creation time.
+- Changing the key interrupts the previous in-flight request; a fresh cached success or a new run for the new key follows.
+
+## Render AsyncResult
+
+`query.state: View>` where `QueryState = { key: K; result: AsyncResult }`.
+
+```tsx
+import { AsyncResult } from "effect/unstable/reactivity"
+
+const [state] = yield* View.useAll([query.state])
+
+AsyncResult.match(state.result, {
+ onInitial: ({ waiting }) => waiting ? Loading...
: Not loaded.
,
+ onFailure: ({ cause, previousSuccess, waiting }) => (/* cause: Cause, previousSuccess: Option */),
+ onSuccess: ({ value, waiting }) => (/* value: A, waiting: refreshing in background */),
+})
+```
+
+`waiting` is independent of the result tag: a background refresh keeps a `Success` successful (with its value) while `waiting: true`; a failed refresh can retain `previousSuccess`. Failures carry a full `Cause` (typed errors, defects, interruption), not just `E`.
+
+## Refresh, fetch, invalidate
+
+| Method | Behavior |
+|---|---|
+| `fetch(key)` | fetch a specific key, wait for its final state |
+| `fetchView(key)` | start fetching a key, return immediately as a live state `View` |
+| `refresh` | resolve the current key again, wait for its final state |
+| `refreshView` | resolve the current key again, return immediately as a live `View` |
+| `invalidateCacheEntry(key)` | remove the cached success for one key |
+| `invalidateCache` | remove every cached success for this query |
+
+The `*View` variants suit synchronous UI callbacks (`runSync(query.refreshView)`); the non-`View` variants suit Effect workflows waiting on the outcome. **Invalidating does not refetch by itself** — follow with `refreshView`, a key change, or a later natural fetch.
+
+```ts
+import { Schedule } from "effect"
+
+const query = yield* Query.make(options).pipe(
+ Query.thenRun,
+ Query.withScheduledRefresh(Schedule.spaced("5 minutes").pipe(Schedule.upTo({ times: 3 }))),
+)
+```
+
+`Query.withScheduledRefresh(schedule)` forks a refresh fiber tied to the surrounding scope; cache/`staleTime` rules still apply.
+
+## Staleness and lifetime
+
+- `staleTime` (per query, falls back to `QueryClient` default): how long a successful result satisfies a fetch without re-running `f`. A stale entry stays available as previous data while it refreshes.
+- `cacheGcTime` (on `QueryClient`): entries unused for `staleTime + cacheGcTime` are evicted.
+- `refreshOnWindowFocus` (per query, falls back to `QueryClient` default): re-resolves the current key on window focus. Requires the optional `@effect/platform-browser` package; without it, the option is silently ignored (rest of the API works normally). Also a no-op outside browser environments.
+
+## The Effect touch
+
+Request fibers belong to the creation scope and are interrupted on unmount, key replacement, or scope closure. Results are `View`s usable outside React too. Mutations do not auto-invalidate queries — compose it explicitly (see `Mutation.md`).
diff --git a/packages/effect-view/ai-docs/ReactRuntime.md b/packages/effect-view/ai-docs/ReactRuntime.md
new file mode 100644
index 0000000..c2a6de1
--- /dev/null
+++ b/packages/effect-view/ai-docs/ReactRuntime.md
@@ -0,0 +1,39 @@
+# ReactRuntime
+
+Owns a managed Effect runtime and exposes it to a React subtree through context. Every effect-view application has exactly one root runtime per independent Effect context tree.
+
+## Create and provide
+
+```tsx
+import { Layer } from "effect"
+import { ReactRuntime } from "effect-view"
+
+const AppLive = Layer.empty // add application layers here
+
+export const runtime = ReactRuntime.make(AppLive)
+```
+
+```tsx
+import { StrictMode } from "react"
+import { createRoot } from "react-dom/client"
+import { ReactRuntime } from "effect-view"
+import { runtime } from "./runtime"
+import { App } from "./App"
+
+createRoot(document.getElementById("root")!).render(
+
+ Starting...}>
+
+ ,
+)
+```
+
+- `ReactRuntime.make(layer, memoMap?)` builds a `ManagedRuntime` and a `React.Context` in one value. Define it at module scope — never inside a render.
+- `ReactRuntime.Provider` builds the runtime layer (which can suspend, hence `fallback`), makes the resulting context available via React context, and disposes the managed runtime on unmount.
+- With a router, keep the provider above the router provider. Put a React error boundary above it if runtime construction can fail.
+
+## Rules
+
+- One runtime instance per app (or per independent subtree that needs its own root context).
+- `ReactRuntime.Provider` only supplies context; it never builds automatically at other boundaries — `Component.withContext` reads it explicitly.
diff --git a/packages/effect-view/ai-docs/State.md b/packages/effect-view/ai-docs/State.md
new file mode 100644
index 0000000..63a7d1c
--- /dev/null
+++ b/packages/effect-view/ai-docs/State.md
@@ -0,0 +1,87 @@
+# State: Lens and View
+
+`Lens` and `View` are effect-view's state primitives, re-exported in full from [`effect-lens`](https://www.npmjs.com/package/effect-lens/v/beta) with two React hooks added on top (`Lens.useState`, `View.useAll`). The core data model, constructors, and focus/derive API belong to `effect-lens` — consult its docs for anything not covered here.
+
+- **`View`** is the read-only half: a current value plus a stream of changes. Use it for anything a component should only observe (derived/computed state, `Query`/`Mutation` state, a read-only field exposed by a service).
+- **`Lens `** is a `View ` that can also be written to. Every `Lens` is a `View`, so anywhere a `View` is expected, a `Lens` works too.
+
+## Create state
+
+```tsx
+import { SubscriptionRef } from "effect"
+import { Lens } from "effect-view"
+
+const count = Lens.fromSubscriptionRef(yield* SubscriptionRef.make(0))
+```
+
+The usual pattern: build state with an Effect primitive (`SubscriptionRef`), then wrap it as a `Lens` with a matching constructor.
+
+## Where to store it
+
+| Owner | When |
+|---|---|
+| Effect service (`Context.Service` + `Layer`) | shared by multiple components / application-level state |
+| `Component.useOnMount` | owned by one component instance (or a shallow subtree receiving it via props) |
+| plain `React.useState` | simple local UI state with no need for Effect integration, subscriptions, or sharing |
+
+```tsx
+class CounterState extends Context.Service
+ readonly doubled: View.View
+}>()("CounterState") {
+ static readonly layer = Layer.effect(CounterState, Effect.gen(function* () {
+ const count = Lens.fromSubscriptionRef(yield* SubscriptionRef.make(0))
+ const doubled = View.map(count, n => n * 2) // derived, read-only
+ return { count, doubled } as const
+ }))
+}
+```
+
+## Read: View.useAll
+
+```tsx
+const [count, doubled] = yield* View.useAll([state.count, state.doubled])
+```
+
+- Reads current values during render, then subscribes via a scoped stream and updates React state on change.
+- This is the default way to read a `Lens` too, since `Lens` is a `View`.
+- `View.useAll(views, { equivalence? })` — `equivalence` controls when a combined change across the supplied views counts as meaningful (defaults to comparing element-wise with `Equal.strictEqual()`).
+
+## Write
+
+```tsx
+yield* Lens.update(state.count, n => n + 1)
+yield* Lens.set(state.count, 0)
+```
+
+## Lens.useState — read/write tuple for controlled inputs
+
+Use when a JSX API wants React's `[value, setValue]` shape (controlled `, never, R>
+const latest = yield* Stream.use(someStream, initialValue) // Effect, never, R>
+```
+
+`Stream.use(stream, initialValue?)` subscribes to `stream` for the component's lifetime (via a scoped fiber forked in a post-commit effect) and returns the latest emitted value as React state, deduped with strict equality. Without `initialValue` the result starts as `Option.none()` until the first emission; with one, it starts as `Option.some(initialValue)`.
+
+Prefer `View.useAll` (see `State.md`) when the source is already a `View`/`Lens` — reach for `Stream.use` when you have a raw Effect `Stream` to observe directly.
diff --git a/packages/effect-view/package.json b/packages/effect-view/package.json
index f005083..50f455f 100644
--- a/packages/effect-view/package.json
+++ b/packages/effect-view/package.json
@@ -1,14 +1,16 @@
{
"name": "effect-view",
"description": "Write React function components with Effect",
- "version": "0.1.4",
+ "version": "0.1.5",
"type": "module",
"files": [
"./README.md",
+ "./AGENTS.md",
"./src/**/*.ts",
"./dist/**/*.js",
"./dist/**/*.js.map",
- "./dist/**/*.d.ts"
+ "./dist/**/*.d.ts",
+ "./ai-docs/**/*.md"
],
"license": "MIT",
"repository": {
diff --git a/packages/effect-view/src/Mutation.test.ts b/packages/effect-view/src/Mutation.test.ts
index ad714e2..5e84e86 100644
--- a/packages/effect-view/src/Mutation.test.ts
+++ b/packages/effect-view/src/Mutation.test.ts
@@ -77,6 +77,29 @@ describe("Mutation", () => {
expect(result.result.previousSuccess.value.value).toBe("saved")
})
+ it("runs a second mutation with its own key, not the previous one", async () => {
+ const result = await runMutationTest(Effect.gen(function*() {
+ const calls: Array = []
+ const mutation = yield* Mutation.make({
+ f: (key: string) => Effect.sync(() => {
+ calls.push(key)
+ return key
+ }),
+ })
+
+ const first = yield* mutation.mutate("a")
+ const second = yield* mutation.mutate("b")
+
+ return { calls, first, second }
+ }))
+
+ expect(result.calls).toEqual(["a", "b"])
+ expect(result.first.key.value).toBe("a")
+ expect(expectSuccessValue(result.first)).toBe("a")
+ expect(result.second.key.value).toBe("b")
+ expect(expectSuccessValue(result.second)).toBe("b")
+ })
+
it("mutateView returns a waiting state without waiting for completion", async () => {
const result = await runMutationTest(Effect.gen(function*() {
const deferred = yield* Deferred.make()
diff --git a/packages/effect-view/src/Mutation.ts b/packages/effect-view/src/Mutation.ts
index 073630d..18c8766 100644
--- a/packages/effect-view/src/Mutation.ts
+++ b/packages/effect-view/src/Mutation.ts
@@ -78,8 +78,10 @@ extends Pipeable.Class implements Mutation {
Scope.Scope | R
> {
return Effect.gen({ self: this }, function*() {
+ const currentKey = Option.some(key) as Option.Some
+
const previous: MutationState = Option.getOrElse(yield* Lens.get(this.latestFinalState), () => ({
- key: Option.some(key) as Option.Some,
+ key: currentKey,
result: AsyncResult.initial(),
}))
const state = yield* makeMutationStateLens(previous)
@@ -89,17 +91,17 @@ extends Pipeable.Class implements Mutation {
state,
previous => AsyncResult.match(previous.result, {
onInitial: () => ({
- key: previous.key,
+ key: currentKey,
result: AsyncResult.initial(true),
}),
onSuccess: result => ({
- key: previous.key,
+ key: currentKey,
result: AsyncResult.success(result.value, {
waiting: true,
}),
}),
onFailure: result => ({
- key: previous.key,
+ key: currentKey,
result: AsyncResult.failure(result.cause, {
waiting: true,
previousSuccess: result.previousSuccess,
@@ -108,7 +110,7 @@ extends Pipeable.Class implements Mutation {
}
)),
- Effect.onExit(this.f(previous.key.value), exit => Effect.gen({ self: this }, function*() {
+ Effect.onExit(this.f(key), exit => Effect.gen({ self: this }, function*() {
const fiberId = yield* Effect.fiberId
const fiber = yield* Lens.get(this.fiber)
@@ -119,24 +121,24 @@ extends Pipeable.Class implements Mutation {
state,
previous => Exit.match(exit, {
onSuccess: v => ({
- key: previous.key,
+ key: currentKey,
result: AsyncResult.success(v),
}),
onFailure: c => Cause.hasInterruptsOnly(c)
? previous
: AsyncResult.match(previous.result, {
onInitial: () => ({
- key: previous.key,
+ key: currentKey,
result: AsyncResult.failure(c),
}),
onSuccess: v => ({
- key: previous.key,
+ key: currentKey,
result: AsyncResult.failure(c, {
previousSuccess: Option.some(v),
}),
}),
onFailure: v => ({
- key: previous.key,
+ key: currentKey,
result: AsyncResult.failure(c, {
previousSuccess: v.previousSuccess,
}),
diff --git a/packages/vite-plugin/package.json b/packages/vite-plugin/package.json
index efa78a5..860ada4 100644
--- a/packages/vite-plugin/package.json
+++ b/packages/vite-plugin/package.json
@@ -1,7 +1,7 @@
{
"name": "@effect-view/vite-plugin",
"description": "Vite Fast Refresh support for Effect View components",
- "version": "0.0.1",
+ "version": "0.0.2",
"type": "module",
"files": [
"./README.md",
diff --git a/packages/vite-plugin/src/index.ts b/packages/vite-plugin/src/index.ts
index 218e479..803e9b0 100644
--- a/packages/vite-plugin/src/index.ts
+++ b/packages/vite-plugin/src/index.ts
@@ -33,11 +33,10 @@ interface ComponentImports {
interface Definition {
readonly expression: ts.Expression
- readonly factoryCall: ts.CallExpression
+ readonly wrapTarget: ts.Expression
readonly body: ts.FunctionLikeDeclaration | undefined
readonly id: string
- readonly pipeline: ts.CallExpression | undefined
- readonly entrypointIndex: number
+ readonly site: EntrypointSite.Pipe | undefined
}
const defaultInclude = /\.[cm]?[jt]sx?$/
@@ -140,6 +139,13 @@ const findFactoryCall = (
if (result)
return
+ // Never look inside a nested function body: a factory call there
+ // belongs to a different, unrelated component (e.g. one composed
+ // dynamically inside this component's own render), not to the
+ // composition shape of the definition being analyzed.
+ if (node !== root && ts.isFunctionLike(node))
+ return
+
if (ts.isCallExpression(node)) {
if (isFactoryCallee(node.expression, imports)) {
result = {
@@ -165,18 +171,83 @@ const findFactoryCall = (
return result
}
-const isPipeline = (expression: ts.Expression): expression is ts.CallExpression =>
- ts.isCallExpression(expression)
- && ts.isPropertyAccessExpression(expression.expression)
- && expression.expression.name.text === "pipe"
+const isPipeline = (node: ts.Node): node is ts.CallExpression =>
+ ts.isCallExpression(node)
+ && ts.isPropertyAccessExpression(node.expression)
+ && node.expression.name.text === "pipe"
-const isEntrypoint = (expression: ts.Expression): boolean => {
- if (!ts.isCallExpression(expression))
- return false
+const entrypointName = (callee: ts.Expression): boolean =>
+ ts.isPropertyAccessExpression(callee)
+ && (callee.name.text === "withRuntime" || callee.name.text === "withContext")
- const callee = expression.expression
- return ts.isPropertyAccessExpression(callee)
- && (callee.name.text === "withRuntime" || callee.name.text === "withContext")
+/**
+ * A curried entrypoint call (`withContext(context)`) used as one step of a
+ * `.pipe(...)` chain: the descriptor produced by the preceding steps must be
+ * registered *before* this step runs, since it is what converts the
+ * descriptor into a plain React function component.
+ */
+const isEntrypoint = (expression: ts.Expression): boolean =>
+ ts.isCallExpression(expression) && entrypointName(expression.expression)
+
+/**
+ * The data-first form of an entrypoint call (`withContext(descriptor,
+ * context)`), which can appear anywhere - not only inside a `.pipe(...)`
+ * chain - and always takes the descriptor to convert as its first argument.
+ */
+const isEntrypointDataFirst = (node: ts.Node): node is ts.CallExpression =>
+ ts.isCallExpression(node)
+ && entrypointName(node.expression)
+ && node.arguments.length >= 2
+
+declare namespace EntrypointSite {
+ export interface Pipe {
+ readonly kind: "pipe"
+ readonly pipeCall: ts.CallExpression
+ readonly argIndex: number
+ }
+
+ export interface DataFirst {
+ readonly kind: "dataFirst"
+ readonly call: ts.CallExpression
+ }
+}
+
+type EntrypointSite = EntrypointSite.Pipe | EntrypointSite.DataFirst
+
+/**
+ * Finds where, anywhere within a definition's composition expression, a
+ * descriptor is converted into a plain React function component - whether
+ * through a `.pipe(..., withContext(context))` chain or a direct
+ * `withContext(descriptor, context)` call. Does not look inside nested
+ * function bodies, for the same reason as `findFactoryCall`.
+ */
+const findEntrypointSite = (root: ts.Node): EntrypointSite | undefined => {
+ let result: EntrypointSite | undefined
+
+ const visit = (node: ts.Node): void => {
+ if (result)
+ return
+
+ if (node !== root && ts.isFunctionLike(node))
+ return
+
+ if (isPipeline(node)) {
+ const argIndex = node.arguments.findIndex(isEntrypoint)
+ if (argIndex >= 0) {
+ result = { kind: "pipe", pipeCall: node, argIndex }
+ return
+ }
+ }
+ else if (isEntrypointDataFirst(node)) {
+ result = { kind: "dataFirst", call: node }
+ return
+ }
+
+ ts.forEachChild(node, visit)
+ }
+
+ visit(root)
+ return result
}
const makeDefinition = (
@@ -185,25 +256,33 @@ const makeDefinition = (
imports: ComponentImports,
): Definition | undefined => {
const factory = findFactoryCall(expression, imports)
+ const site = findEntrypointSite(expression)
+
+ // A `.pipe(..., withContext(context))` chain always needs the splice
+ // treatment, whether or not a factory call could be found in this same
+ // statement (its base may be a component defined elsewhere).
+ if (site?.kind === "pipe")
+ return { expression, wrapTarget: expression, body: factory?.body, id, site }
+
+ // `withContext(descriptor, context)` always needs its descriptor
+ // argument wrapped directly, since by the time the call returns the
+ // result is a plain function component, not a Component descriptor.
+ if (site?.kind === "dataFirst") {
+ const target = site.call.arguments[0]
+ if (!target)
+ return undefined
+ return { expression, wrapTarget: target, body: factory?.body, id, site: undefined }
+ }
+
+ // No entrypoint conversion happens within this statement: the
+ // descriptor remains a Component.Any throughout, however it got here
+ // (a bare factory call, a `.pipe()` of traits with no withContext, or a
+ // user-defined composition helper wrapping either) - safe to register
+ // the whole expression.
if (!factory)
return undefined
- const pipeline = isPipeline(expression) ? expression : undefined
- if (expression !== factory.factoryCall && !pipeline)
- return undefined
-
- const entrypointIndex = pipeline
- ? pipeline.arguments.findIndex(isEntrypoint)
- : -1
-
- return {
- expression,
- factoryCall: factory.factoryCall,
- body: factory.body,
- id,
- pipeline,
- entrypointIndex,
- }
+ return { expression, wrapTarget: expression, body: factory.body, id, site: undefined }
}
const collectDefinitions = (
@@ -260,9 +339,19 @@ const collectDefinitions = (
return definitions
}
+/**
+ * Computes a signature for the *shape* of a component's hook calls: the
+ * ordered sequence of hook names it calls at its top level, ignoring
+ * everything else (argument contents, dependency array entries, unrelated
+ * logic). Two bodies calling the same hooks in the same order hash to the
+ * same signature even if most of their code differs, so edits that don't
+ * touch which hooks run - the overwhelming majority of edits - refresh in
+ * place instead of forcing a remount. This mirrors how React's own Fast
+ * Refresh only forces a remount when the hook call sequence itself changes,
+ * not when a hook's arguments or the surrounding logic change.
+ */
const hookSignature = (
body: ts.FunctionLikeDeclaration | undefined,
- sourceFile: ts.SourceFile,
): string => {
if (!body?.body)
return "unknown"
@@ -276,14 +365,18 @@ const hookSignature = (
if (ts.isCallExpression(node)) {
const callee = node.expression
- const name = ts.isIdentifier(callee)
+ const localName = ts.isIdentifier(callee)
? callee.text
: ts.isPropertyAccessExpression(callee)
? callee.name.text
: undefined
- if (name && /^use[A-Z0-9]/.test(name))
- hooks.push(node.getText(sourceFile))
+ if (localName && /^use[A-Z0-9]/.test(localName)) {
+ const qualifier = ts.isPropertyAccessExpression(callee) && ts.isIdentifier(callee.expression)
+ ? `${callee.expression.text}.`
+ : ""
+ hooks.push(`${qualifier}${localName}`)
+ }
}
ts.forEachChild(node, visit)
@@ -384,10 +477,10 @@ export function effectView(
const edits: Edit[] = []
for (const definition of definitions) {
- const signature = hookSignature(definition.body, sourceFile)
+ const signature = hookSignature(definition.body)
- if (definition.pipeline && definition.entrypointIndex >= 0) {
- const entrypoint = definition.pipeline.arguments[definition.entrypointIndex]
+ if (definition.site?.kind === "pipe") {
+ const entrypoint = definition.site.pipeCall.arguments[definition.site.argIndex]
if (!entrypoint)
continue
edits.push({
@@ -403,8 +496,8 @@ export function effectView(
continue
}
- const start = definition.expression.getStart(sourceFile)
- const end = definition.expression.end
+ const start = definition.wrapTarget.getStart(sourceFile)
+ const end = definition.wrapTarget.end
edits.push({
start,
end,
diff --git a/packages/vite-plugin/src/plugin.test.ts b/packages/vite-plugin/src/plugin.test.ts
index 53a5436..4a87d61 100644
--- a/packages/vite-plugin/src/plugin.test.ts
+++ b/packages/vite-plugin/src/plugin.test.ts
@@ -135,4 +135,77 @@ export const Legacy = Component.makeUntraced(function*() {
})
`)).toBeUndefined()
})
+
+ it("registers a component wrapped by a user-defined helper function", async () => {
+ const result = await transform(`
+import { Component } from "effect-view"
+
+const withLogging = (view) => view
+
+export const LoggedView = withLogging(Component.make("LoggedView")(function*() {
+ return
+}))
+`)
+
+ expect(result).toContain("__effectViewRefresh(withLogging(Component.make(\"LoggedView\")")
+ expect(result).toContain("\"src/View.tsx:LoggedView\"")
+ })
+
+ it("wraps the descriptor argument of a data-first withContext call", async () => {
+ const result = await transform(`
+import { Component } from "effect-view"
+
+const HomeBase = Component.make("Home")(function*() {
+ return
+})
+
+export const Home = Component.withContext(HomeBase, runtime.context)
+`)
+
+ expect(result).toContain("__effectViewRefresh(Component.make(\"Home\")")
+ expect(result).toContain("Component.withContext(__effectViewRefresh(HomeBase, import.meta.hot, \"src/View.tsx:Home\", \"unknown\", false), runtime.context)")
+ })
+
+ it("keeps the same hook signature when only literal content inside a hook call changes", async () => {
+ const before = await transform(`
+import { Component } from "effect-view"
+export const CounterView = Component.make("CounterView")(function*() {
+ const value = yield* Component.useOnMount(() => loadInitial(1))
+ return {value}
+})
+`)
+ const after = await transform(`
+import { Component } from "effect-view"
+export const CounterView = Component.make("CounterView")(function*() {
+ const value = yield* Component.useOnMount(() => loadInitial(2))
+ return {value}
+})
+`)
+
+ const signatureOf = (code: string | undefined) => code?.match(/"src\/View\.tsx:CounterView", "([a-z0-9]+)"/)?.[1]
+ expect(signatureOf(before)).toBeDefined()
+ expect(signatureOf(before)).toBe(signatureOf(after))
+ })
+
+ it("changes the hook signature when a hook call is added", async () => {
+ const before = await transform(`
+import { Component } from "effect-view"
+export const CounterView = Component.make("CounterView")(function*() {
+ const value = yield* Component.useOnMount(() => loadInitial())
+ return {value}
+})
+`)
+ const after = await transform(`
+import { Component } from "effect-view"
+export const CounterView = Component.make("CounterView")(function*() {
+ const value = yield* Component.useOnMount(() => loadInitial())
+ yield* Component.useReactEffect(() => trackView(), [])
+ return {value}
+})
+`)
+
+ const signatureOf = (code: string | undefined) => code?.match(/"src\/View\.tsx:CounterView", "([a-z0-9]+)"/)?.[1]
+ expect(signatureOf(before)).toBeDefined()
+ expect(signatureOf(before)).not.toBe(signatureOf(after))
+ })
})