refactor(plugin): scope context hook to session (#37175)

Co-authored-by: Dax Raad <d@ironbay.co>

packages/core/test/plugin/promise.test.ts

@@ -10,7 +10,7 @@ import { SessionV2 } from "@opencode-ai/core/session"
 import { SessionMessage } from "@opencode-ai/core/session/message"
 import { ToolRegistry } from "@opencode-ai/core/tool/registry"
 import { Plugin } from "@opencode-ai/plugin/v2"
-import type { AIHooks } from "@opencode-ai/plugin/v2/effect/ai"
+import type { SessionHooks } from "@opencode-ai/plugin/v2/effect/session"
 import { Model } from "@opencode-ai/schema/model"
 import { Provider } from "@opencode-ai/schema/provider"
 import { testEffect } from "../lib/effect"
@@ -77,24 +77,24 @@ describe("fromPromise", () => {
     }),
   )
 
-  it.effect("forwards AI request hooks", () =>
+  it.effect("forwards session context hooks", () =>
     Effect.gen(function* () {
       const plugin = yield* PluginV2.Service
       const hooks = yield* PluginHooks.Service
       const host = yield* PluginHost.make(plugin)
       yield* PluginPromise.fromPromise(
         Plugin.define({
-          id: "promise-ai-request",
+          id: "promise-session-context",
           setup: async (ctx) => {
-            await ctx.ai.hook("request", (event) => {
+            await ctx.session.hook("context", (event) => {
               event.system.push(SystemPart.make("Promise hook"))
               delete event.tools.echo
             })
           },
         }),
       ).effect(host)
-      const event: AIHooks["request"] = {
-        sessionID: SessionV2.ID.make("ses_promise_ai_request"),
+      const event: SessionHooks["context"] = {
+        sessionID: SessionV2.ID.make("ses_promise_session_context"),
         agent: AgentV2.ID.make("build"),
         model: Model.Ref.make({ providerID: Provider.ID.make("test"), id: Model.ID.make("model") }),
         system: [SystemPart.make("Initial")],
@@ -102,7 +102,7 @@ describe("fromPromise", () => {
         tools: { echo: { description: "Echo", input: { type: "object" } } },
       }
 
-      yield* hooks.trigger("ai", "request", event)
+      yield* hooks.trigger("session", "context", event)
 
       expect(event.system.map((part) => part.text)).toEqual(["Initial", "Promise hook"])
       expect(event.tools).toEqual({})