skill: use Effect.cached for load deduplication (#19165)

packages/opencode/src/mcp/auth.ts

@@ -3,7 +3,7 @@ import z from "zod"
 import { Global } from "../global"
 import { Effect, Layer, ServiceMap } from "effect"
 import { AppFileSystem } from "@/filesystem"
-import { makeRunPromise } from "@/effect/run-service"
+import { makeRuntime } from "@/effect/run-service"
 
 export namespace McpAuth {
   export const Tokens = z.object({
@@ -143,7 +143,7 @@ export namespace McpAuth {
 
   const defaultLayer = layer.pipe(Layer.provide(AppFileSystem.defaultLayer))
 
-  const runPromise = makeRunPromise(Service, defaultLayer)
+  const { runPromise } = makeRuntime(Service, defaultLayer)
 
   // Async facades for backward compat (used by McpOAuthProvider, CLI)
 

packages/opencode/src/mcp/index.ts

@@ -26,7 +26,7 @@ import { TuiEvent } from "@/cli/cmd/tui/event"
 import open from "open"
 import { Effect, Layer, Option, ServiceMap, Stream } from "effect"
 import { InstanceState } from "@/effect/instance-state"
-import { makeRunPromise } from "@/effect/run-service"
+import { makeRuntime } from "@/effect/run-service"
 import { ChildProcess, ChildProcessSpawner } from "effect/unstable/process"
 import * as CrossSpawnSpawner from "@/effect/cross-spawn-spawner"
 import { NodeFileSystem } from "@effect/platform-node"
@@ -893,7 +893,7 @@ export namespace MCP {
     Layer.provide(NodePath.layer),
   )
 
-  const runPromise = makeRunPromise(Service, defaultLayer)
+  const { runPromise } = makeRuntime(Service, defaultLayer)
 
   // --- Async facade functions ---
 

packages/opencode/src/skill/index.ts

@@ -54,11 +54,6 @@ export namespace Skill {
   type State = {
     skills: Record<string, Info>
     dirs: Set<string>
-    task?: Promise<void>
-  }
-
-  type Cache = State & {
-    ensure: () => Promise<void>
   }
 
   export interface Interface {
@@ -116,14 +111,7 @@ export namespace Skill {
       })
   }
 
-  // TODO: Migrate to Effect
-  const create = (discovery: Discovery.Interface, directory: string, worktree: string): Cache => {
-    const state: State = {
-      skills: {},
-      dirs: new Set<string>(),
-    }
-
-    const load = async () => {
+  async function loadSkills(state: State, discovery: Discovery.Interface, directory: string, worktree: string) {
     if (!Flag.OPENCODE_DISABLE_EXTERNAL_SKILLS) {
       for (const dir of EXTERNAL_DIRS) {
         const root = path.join(Global.Path.home, dir)
@@ -166,18 +154,6 @@ export namespace Skill {
     log.info("init", { count: Object.keys(state.skills).length })
   }
 
-    const ensure = () => {
-      if (state.task) return state.task
-      state.task = load().catch((err) => {
-        state.task = undefined
-        throw err
-      })
-      return state.task
-    }
-
-    return { ...state, ensure }
-  }
-
   export class Service extends ServiceMap.Service<Service, Interface>()("@opencode/Skill") {}
 
   export const layer: Layer.Layer<Service, never, Discovery.Service> = Layer.effect(
@@ -185,33 +161,33 @@ export namespace Skill {
     Effect.gen(function* () {
       const discovery = yield* Discovery.Service
       const state = yield* InstanceState.make(
-        Effect.fn("Skill.state")((ctx) => Effect.sync(() => create(discovery, ctx.directory, ctx.worktree))),
+        Effect.fn("Skill.state")((ctx) =>
+          Effect.gen(function* () {
+            const s: State = { skills: {}, dirs: new Set() }
+            yield* Effect.promise(() => loadSkills(s, discovery, ctx.directory, ctx.worktree))
+            return s
+          }),
+        ),
       )
 
-      const ensure = Effect.fn("Skill.ensure")(function* () {
-        const cache = yield* InstanceState.get(state)
-        yield* Effect.promise(() => cache.ensure())
-        return cache
-      })
-
       const get = Effect.fn("Skill.get")(function* (name: string) {
-        const cache = yield* ensure()
-        return cache.skills[name]
+        const s = yield* InstanceState.get(state)
+        return s.skills[name]
       })
 
       const all = Effect.fn("Skill.all")(function* () {
-        const cache = yield* ensure()
-        return Object.values(cache.skills)
+        const s = yield* InstanceState.get(state)
+        return Object.values(s.skills)
       })
 
       const dirs = Effect.fn("Skill.dirs")(function* () {
-        const cache = yield* ensure()
-        return Array.from(cache.dirs)
+        const s = yield* InstanceState.get(state)
+        return Array.from(s.dirs)
       })
 
       const available = Effect.fn("Skill.available")(function* (agent?: Agent.Info) {
-        const cache = yield* ensure()
-        const list = Object.values(cache.skills).toSorted((a, b) => a.name.localeCompare(b.name))
+        const s = yield* InstanceState.get(state)
+        const list = Object.values(s.skills).toSorted((a, b) => a.name.localeCompare(b.name))
         if (!agent) return list
         return list.filter((skill) => Permission.evaluate("skill", skill.name, agent.permission).action !== "deny")
       })