docs(plugin): update current API examples

packages/core/src/session/runner/publish-llm-event.ts

@@ -1,6 +1,5 @@
 import { type LLMEvent, type ProviderMetadata, type ToolResultValue } from "@opencode-ai/ai"
 import { Clock, Effect, Iterable } from "effect"
-import { isArrayNonEmpty, isReadonlyArrayNonEmpty } from "effect/Array"
 import { Bus } from "../../bus.js"
 import { Model } from "../../model.js"
 import { SessionEvent } from "../event.js"
@@ -46,6 +45,9 @@ export interface StepRecord {
 /** Derives canonical model content from a provider-hosted tool result. */
 type NonEmptyContent = readonly [Tool.Content, ...Tool.Content[]]
 
+const nonEmpty = (content: ReadonlyArray<Tool.Content>): NonEmptyContent | undefined =>
+  content.length > 0 ? (content as NonEmptyContent) : undefined
+
 const stringify = (value: unknown) => {
   if (typeof value === "string") return value
   try {
@@ -56,7 +58,10 @@ const stringify = (value: unknown) => {
 }
 
 const hostedContent = (result: ToolResultValue): NonEmptyContent => {
-  if (result.type === "content" && isReadonlyArrayNonEmpty(result.value)) return result.value
+  if (result.type === "content") {
+    const content = nonEmpty(result.value)
+    if (content !== undefined) return content
+  }
   return [{ type: "text", text: stringify(result.value) }]
 }
 
@@ -556,12 +561,12 @@ export const createLLMEventPublisher = (bus: Pick<Bus.Interface, "publish">, inp
         : result.content === undefined
           ? []
           : [...result.content]
-    if (!isArrayNonEmpty(content)) return yield* Effect.die(new Error(`Tool execution has no content: ${id}`))
+    if (content.length === 0) return yield* Effect.die(new Error(`Tool execution has no content: ${id}`))
     yield* bus.publish(SessionEvent.Tool.Success, {
       sessionID: input.sessionID,
       assistantMessageID,
       id,
-      content,
+      content: [content[0], ...content.slice(1)],
       ...(result.metadata === undefined ? {} : { metadata: result.metadata }),
       executed: tool.providerExecuted,
     })

packages/core/src/session/transfer.ts

@@ -5,7 +5,6 @@ import { Tool } from "@opencode-ai/schema/tool"
 import { Skill } from "@opencode-ai/schema/skill"
 import { eq } from "drizzle-orm"
 import { Context, DateTime, Effect, Layer, Schema } from "effect"
-import { map } from "effect/Array"
 import path from "path"
 import { makeGlobalNode } from "@opencode-ai/util/effect/app-node"
 import { App } from "../app.js"
@@ -305,13 +304,21 @@ function sanitizeToolState(id: string, state: SessionMessage.ToolState): Session
     return {
       ...state,
       input: { redacted: `tool-input:${id}` },
-      content: map(state.content, (item) => sanitizeToolContent(id, item)),
+      content: [
+        sanitizeToolContent(id, state.content[0]),
+        ...state.content.slice(1).map((item) => sanitizeToolContent(id, item)),
+      ],
       metadata: meta,
     }
   return {
     ...state,
     input: { redacted: `tool-input:${id}` },
-    content: state.content ? map(state.content, (item) => sanitizeToolContent(id, item)) : undefined,
+    content: state.content
+      ? [
+          sanitizeToolContent(id, state.content[0]),
+          ...state.content.slice(1).map((item) => sanitizeToolContent(id, item)),
+        ]
+      : undefined,
     metadata: meta,
   }
 }

packages/plugin/src/README.md

@@ -5,7 +5,9 @@ The Promise plugin API at `@opencode-ai/plugin` is the async/await equivalent of
 - `hook` installs behavior at an OpenCode extension point.
 - `reload` reruns every transform hook for a stateful domain.
 
-The only difference from the Effect API is the async boundary: hook callbacks, hook registration, `reload`, and `Registration.dispose` use Promises instead of Effects.
+The Promise API uses Promises instead of Effects for setup, runtime hook
+callbacks, hook registration, `reload`, and `Registration.dispose`. Transform
+draft callbacks remain synchronous.
 
 ## Defining A Plugin
 
@@ -46,12 +48,15 @@ await registration.dispose()
 
 ## Transform Hooks
 
-Transform hooks contribute to stateful domains. The draft editor is synchronous; the callback may be `async` when it needs to await other work:
+Transform hooks contribute to stateful domains. The draft editor is synchronous,
+so load asynchronous data before registering a transform or reloading its domain:
 
 ```ts
+const description = await loadReviewerDescription()
+
 await ctx.agent.transform((agent) => {
   agent.update("reviewer", (item) => {
-    item.description = "Reviews code for regressions"
+    item.description = description
     item.mode = "subagent"
   })
 })
@@ -64,8 +69,12 @@ ctx.agent.transform
 ctx.catalog.transform
 ctx.command.transform
 ctx.integration.transform
+ctx.mcp.transform
 ctx.reference.transform
 ctx.skill.transform
+ctx.tool.transform
+ctx.vcs.transform
+ctx.websearch.transform
 ```
 
 ## Runtime Hooks
@@ -81,7 +90,7 @@ await ctx.aisdk.hook("sdk", async (event) => {
 
 await ctx.aisdk.hook("language", (event) => {
   if (event.model.providerID !== "xai") return
-  event.language = event.sdk.responses(event.model.api.id)
+  event.language = event.sdk.responses(event.model.modelID)
 })
 ```
 
@@ -94,14 +103,15 @@ await ctx.session.hook("context", (event) => {
 })
 ```
 
-Promise tools use executable tool values with async executors. Registration
-supplies the tool's name and options separately:
+Promise tools use complete executable tool values with async executors:
 
 ```ts
 import { Schema } from "effect"
 
 await ctx.tool.transform((tools) => {
-  tools.add("echo", {
+  tools.add({
+    name: "echo",
+    options: { codemode: false },
     description: "Echo text",
     input: Schema.Struct({ text: Schema.String }),
     output: Schema.Struct({ text: Schema.String }),
@@ -132,6 +142,10 @@ ctx.agent.reload()
 ctx.catalog.reload()
 ctx.command.reload()
 ctx.integration.reload()
+ctx.mcp.reload()
 ctx.reference.reload()
 ctx.skill.reload()
+ctx.tool.reload()
+ctx.vcs.reload()
+ctx.websearch.reload()
 ```

packages/plugin/src/effect/README.md

@@ -31,7 +31,9 @@ Registrations are owned by the plugin scope. Closing the scope removes them auto
 
 ## Transform Hooks
 
-Transform hooks contribute to stateful domains:
+Transform hooks contribute to stateful domains. Their draft callbacks are
+synchronous, so load effectful data before registering a transform or reloading
+its domain:
 
 ```ts
 yield *
@@ -52,8 +54,12 @@ ctx.agent.transform
 ctx.catalog.transform
 ctx.command.transform
 ctx.integration.transform
+ctx.mcp.transform
 ctx.reference.transform
 ctx.skill.transform
+ctx.tool.transform
+ctx.vcs.transform
+ctx.websearch.transform
 ```
 
 ## Runtime Hooks
@@ -72,10 +78,12 @@ yield *
   )
 
 yield *
-  ctx.aisdk.hook("language", (event) => {
-    if (event.model.providerID !== "xai") return
-    event.language = event.sdk.responses(event.model.api.id)
-  })
+  ctx.aisdk.hook("language", (event) =>
+    Effect.sync(() => {
+      if (event.model.providerID !== "xai") return
+      event.language = event.sdk.responses(event.model.modelID)
+    }),
+  )
 ```
 
 Hooks run sequentially in registration order. Later hooks observe mutations made by earlier hooks.
@@ -117,6 +125,10 @@ ctx.agent.reload()
 ctx.catalog.reload()
 ctx.command.reload()
 ctx.integration.reload()
+ctx.mcp.reload()
 ctx.reference.reload()
 ctx.skill.reload()
+ctx.tool.reload()
+ctx.vcs.reload()
+ctx.websearch.reload()
 ```

packages/util/src/cross-spawn-spawner.ts

@@ -1,4 +1,4 @@
-import { isArrayNonEmpty } from "effect/Array"
+import type { NonEmptyReadonlyArray } from "effect/Array"
 import * as NodeFileSystem from "@effect/platform-node/NodeFileSystem"
 import * as NodePath from "@effect/platform-node/NodePath"
 import * as NodeSink from "@effect/platform-node/NodeSink"
@@ -62,9 +62,10 @@ const flatten = (command: ChildProcess.Command) => {
   }
 
   walk(command)
-  if (!isArrayNonEmpty(commands)) throw new Error("flatten produced empty commands array")
+  if (commands.length === 0) throw new Error("flatten produced empty commands array")
+  const [head, ...tail] = commands
   return {
-    commands,
+    commands: [head, ...tail] as NonEmptyReadonlyArray<ChildProcess.StandardCommand>,
     opts,
   }
 }