feat(plugin): restore ai request hook

packages/plugin/src/v2/effect/README.md

@@ -80,14 +80,16 @@ yield *
 
 Hooks run sequentially in registration order. Later hooks observe mutations made by earlier hooks.
 
-Session request context is mutable immediately before provider dispatch:
+AI request context is mutable immediately before provider dispatch:
 
 ```ts
 yield *
-  ctx.session.hook("request", (event) => {
-    event.tools.read.description = "Read a file using narrow line ranges."
-    delete event.tools.write
-  })
+  ctx.ai.hook("request", (event) =>
+    Effect.sync(() => {
+      event.tools.read.description = "Read a file using narrow line ranges."
+      delete event.tools.write
+    }),
+  )
 ```
 
 ## Reloading A Domain

packages/plugin/src/v2/effect/ai.ts

@@ -0,0 +1,23 @@
+import type { Message, SystemPart } from "@opencode-ai/ai"
+import type { Agent } from "@opencode-ai/schema/agent"
+import type { Model } from "@opencode-ai/schema/model"
+import type { Session } from "@opencode-ai/schema/session"
+import type { JsonSchema } from "effect"
+import type { Hooks } from "./registration.js"
+
+export interface AIRequest {
+  readonly sessionID: Session.ID
+  readonly agent: Agent.ID
+  readonly model: Model.Ref
+  system: Array<SystemPart>
+  messages: Array<Message>
+  tools: Record<string, { description: string; input: JsonSchema.JsonSchema }>
+}
+
+export interface AIHooks {
+  readonly request: AIRequest
+}
+
+export interface AIDomain {
+  readonly hook: Hooks<AIHooks>
+}

packages/plugin/src/v2/effect/plugin.ts

@@ -2,6 +2,7 @@ import type { PluginApi } from "@opencode-ai/client/effect/api"
 import type { Effect, Scope } from "effect"
 import type { PluginOptions } from "../options.js"
 import type { AgentDomain } from "./agent.js"
+import type { AIDomain } from "./ai.js"
 import type { AISDKDomain } from "./aisdk.js"
 import type { CatalogDomain } from "./catalog.js"
 import type { CommandDomain } from "./command.js"
@@ -15,6 +16,7 @@ import type { ToolDomain } from "./tool.js"
 export interface Context {
   readonly options: PluginOptions
   readonly agent: AgentDomain
+  readonly ai: AIDomain
   readonly aisdk: AISDKDomain
   readonly catalog: CatalogDomain
   readonly command: CommandDomain

packages/plugin/src/v2/promise/README.md

@@ -85,10 +85,10 @@ await ctx.aisdk.hook("language", (event) => {
 })
 ```
 
-Session request context is mutable immediately before provider dispatch:
+AI request context is mutable immediately before provider dispatch:
 
 ```ts
-await ctx.session.hook("request", (event) => {
+await ctx.ai.hook("request", (event) => {
   event.tools.read.description = "Read a file using narrow line ranges."
   delete event.tools.write
 })

packages/plugin/src/v2/promise/ai.ts

@@ -0,0 +1,23 @@
+import type { Message, SystemPart } from "@opencode-ai/ai"
+import type { Agent } from "@opencode-ai/schema/agent"
+import type { Model } from "@opencode-ai/schema/model"
+import type { Session } from "@opencode-ai/schema/session"
+import type { JsonSchema } from "effect"
+import type { Hooks } from "./registration.js"
+
+export interface AIRequest {
+  readonly sessionID: Session.ID
+  readonly agent: Agent.ID
+  readonly model: Model.Ref
+  system: Array<SystemPart>
+  messages: Array<Message>
+  tools: Record<string, { description: string; input: JsonSchema.JsonSchema }>
+}
+
+export interface AIHooks {
+  readonly request: AIRequest
+}
+
+export interface AIDomain {
+  readonly hook: Hooks<AIHooks>
+}

packages/plugin/src/v2/promise/plugin.ts

@@ -1,6 +1,7 @@
 import type { PluginApi } from "@opencode-ai/client/promise/api"
 import type { PluginOptions } from "../options.js"
 import type { AgentDomain } from "./agent.js"
+import type { AIDomain } from "./ai.js"
 import type { AISDKDomain } from "./aisdk.js"
 import type { CatalogDomain } from "./catalog.js"
 import type { CommandDomain } from "./command.js"
@@ -14,6 +15,7 @@ import type { ToolDomain } from "./tool.js"
 export interface Context {
   readonly options: PluginOptions
   readonly agent: AgentDomain
+  readonly ai: AIDomain
   readonly aisdk: AISDKDomain
   readonly catalog: CatalogDomain
   readonly command: CommandDomain