feat(core): add command registry (#30624)

packages/core/src/command.ts

@@ -0,0 +1,68 @@
+export * as CommandV2 from "./command"
+
+import { Context, Effect, Layer, Schema } from "effect"
+import { castDraft, type Draft } from "immer"
+import { ModelV2 } from "./model"
+import { State } from "./state"
+
+export class Info extends Schema.Class<Info>("CommandV2.Info")({
+  name: Schema.String,
+  template: Schema.String,
+  description: Schema.String.pipe(Schema.optional),
+  agent: Schema.String.pipe(Schema.optional),
+  model: ModelV2.Ref.pipe(Schema.optional),
+  subtask: Schema.Boolean.pipe(Schema.optional),
+}) {}
+
+export type Data = {
+  commands: Map<string, Info>
+}
+
+export type Editor = {
+  list: () => readonly Info[]
+  get: (name: string) => Info | undefined
+  update: (name: string, update: (command: Draft<Info>) => void) => void
+  remove: (name: string) => void
+}
+
+export interface Interface {
+  readonly transform: State.Interface<Data, Editor>["transform"]
+  readonly get: (name: string) => Effect.Effect<Info | undefined>
+  readonly list: () => Effect.Effect<Info[]>
+}
+
+export class Service extends Context.Service<Service, Interface>()("@opencode/v2/Command") {}
+
+export const layer = Layer.effect(
+  Service,
+  Effect.sync(() => {
+    const state = State.create<Data, Editor>({
+      initial: () => ({ commands: new Map() }),
+      editor: (draft) => ({
+        list: () => Array.from(draft.commands.values()) as Info[],
+        get: (name) => draft.commands.get(name),
+        update: (name, update) => {
+          const current = draft.commands.get(name) ?? castDraft(new Info({ name, template: "" }))
+          if (!draft.commands.has(name)) draft.commands.set(name, current)
+          update(current)
+          current.name = name
+        },
+        remove: (name) => {
+          draft.commands.delete(name)
+        },
+      }),
+    })
+
+    return Service.of({
+      transform: state.transform,
+      get: Effect.fn("CommandV2.get")(function* (name) {
+        return state.get().commands.get(name)
+      }),
+      list: Effect.fn("CommandV2.list")(function* () {
+        return Array.from(state.get().commands.values())
+      }),
+    })
+  }),
+)
+
+export const locationLayer = layer