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allow overriding AtomHttpApi & AtomRpc runtime factory #409

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Merged
tim-smart merged 3 commits into from
Feb 17, 2026
Merged

allow overriding AtomHttpApi & AtomRpc runtime factory #409

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f684ddc
feat(atom): allow custom runtime factories
harrysolovay Feb 17, 2026
978cf80
add changeset
harrysolovay Feb 17, 2026
2dbbffb
docs
tim-smart Feb 17, 2026
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5 changes: 5 additions & 0 deletions .changeset/soft-spiders-care.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"@effect-atom/atom": minor
---

allow overriding AtomHttpApi & AtomRpc runtime factory
1 change: 1 addition & 0 deletions docs/atom/AtomHttpApi.ts.md
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Expand Up @@ -49,6 +49,7 @@ export declare const Tag: <Self>() => <
| ((effect: Effect.Effect<unknown, unknown>) => Effect.Effect<unknown, unknown>)
| undefined
readonly baseUrl?: URL | string | undefined
readonly runtime?: Atom.RuntimeFactory | undefined
}
) => AtomHttpApiClient<Self, Id, Groups, ApiE, E>
```
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1 change: 1 addition & 0 deletions docs/atom/AtomRpc.ts.md
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Expand Up @@ -41,6 +41,7 @@ export declare const Tag: <Self>() => <
readonly generateRequestId?: (() => RequestId) | undefined
readonly disableTracing?: boolean | undefined
readonly makeEffect?: Effect.Effect<RpcClient.RpcClient.Flat<Rpcs, RpcClientError>, never, RM> | undefined
readonly runtime?: Atom.RuntimeFactory | undefined
}
) => AtomRpcClient<Self, Id, Rpcs, ER>
```
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4 changes: 3 additions & 1 deletion packages/atom/src/AtomHttpApi.ts
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Expand Up @@ -161,6 +161,7 @@ export const Tag =
| ((effect: Effect.Effect<unknown, unknown>) => Effect.Effect<unknown, unknown>)
| undefined
readonly baseUrl?: URL | string | undefined
readonly runtime?: Atom.RuntimeFactory | undefined
}
): AtomHttpApiClient<Self, Id, Groups, ApiE, E> => {
const self: Mutable<AtomHttpApiClient<Self, Id, Groups, ApiE, E>> = Context.Tag(id)<
Expand All @@ -172,7 +173,8 @@ export const Tag =
self,
HttpApiClient.make(options.api, options)
).pipe(Layer.provide(options.httpClient)) as Layer.Layer<Self, E>
self.runtime = Atom.runtime(self.layer)
const runtimeFactory = options.runtime ?? Atom.runtime
self.runtime = runtimeFactory(self.layer)

const mutationFamily = Atom.family(({ endpoint, group, withResponse }: MutationKey) =>
self.runtime.fn<{
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4 changes: 3 additions & 1 deletion packages/atom/src/AtomRpc.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -118,6 +118,7 @@ export const Tag = <Self>() =>
readonly generateRequestId?: (() => RequestId) | undefined
readonly disableTracing?: boolean | undefined
readonly makeEffect?: Effect.Effect<RpcClient.RpcClient.Flat<Rpcs, RpcClientError>, never, RM> | undefined
readonly runtime?: Atom.RuntimeFactory | undefined
}
): AtomRpcClient<Self, Id, Rpcs, ER> => {
const self: Mutable<AtomRpcClient<Self, Id, Rpcs, ER>> = Context.Tag(id)<
Expand All @@ -133,7 +134,8 @@ export const Tag = <Self>() =>
flatten: true
}) as Effect.Effect<RpcClient.RpcClient.Flat<Rpcs, RpcClientError>, never, RM>
).pipe(Layer.provide(options.protocol))
self.runtime = Atom.runtime(self.layer)
const runtimeFactory = options.runtime ?? Atom.runtime
self.runtime = runtimeFactory(self.layer)

self.mutation = Atom.family(<Tag extends Rpc.Tag<Rpcs>>(tag: Tag) =>
self.runtime.fn<{
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