diff --git a/packages/opencode/src/plugin/index.ts b/packages/opencode/src/plugin/index.ts
index 6032935f84..3b8f5ee718 100644
--- a/packages/opencode/src/plugin/index.ts
+++ b/packages/opencode/src/plugin/index.ts
@@ -95,19 +95,20 @@ export namespace Plugin {
     }
   })
 
-  export async function trigger<
-    Name extends Exclude<keyof Required<Hooks>, "auth" | "event" | "tool">,
-    Input = Parameters<Required<Hooks>[Name]>[0],
-    Output = Parameters<Required<Hooks>[Name]>[1],
-  >(name: Name, input: Input, output: Output): Promise<Output> {
+  type HookName = Exclude<keyof Hooks, "auth" | "event" | "tool" | "config">
+  type Params<Name extends HookName> = Parameters<Required<Hooks>[Name]>
+
+  export const trigger = async <Name extends HookName>(
+    name: Name,
+    ...params: Params<Name>
+  ): Promise<(typeof params)[1]> => {
+    const [, output] = params
     if (!name) return output
     for (const hook of await state().then((x) => x.hooks)) {
-      const fn = hook[name]
+      // this cast is safe and correctly types `fn`
+      const fn = hook[name] as Extract<Hooks[Name], (...params: Params<Name>) => any>
       if (!fn) continue
-      // @ts-expect-error if you feel adventurous, please fix the typing, make sure to bump the try-counter if you
-      // give up.
-      // try-counter: 2
-      await fn(input, output)
+      await fn(...params)
     }
     return output
   }
@@ -120,7 +121,6 @@ export namespace Plugin {
     const hooks = await state().then((x) => x.hooks)
     const config = await Config.get()
     for (const hook of hooks) {
-      // @ts-expect-error this is because we haven't moved plugin to sdk v2
       await hook.config?.(config)
     }
     Bus.subscribeAll(async (input) => {
diff --git a/packages/plugin/src/index.ts b/packages/plugin/src/index.ts
index 86e7ae9342..abae1119a0 100644
--- a/packages/plugin/src/index.ts
+++ b/packages/plugin/src/index.ts
@@ -1,16 +1,16 @@
+import { createOpencodeClient } from "@opencode-ai/sdk"
 import type {
   Event,
-  createOpencodeClient,
   Project,
   Model,
   Provider,
-  Permission,
   UserMessage,
-  Message,
-  Part,
   Auth,
   Config,
-} from "@opencode-ai/sdk"
+  Agent,
+  Message,
+  Part,
+} from "@opencode-ai/sdk/v2"
 
 import type { BunShell } from "./shell"
 import { type ToolDefinition } from "./tool"
@@ -169,29 +169,42 @@ export interface Hooks {
    * Modify parameters sent to LLM
    */
   "chat.params"?: (
-    input: { sessionID: string; agent: string; model: Model; provider: ProviderContext; message: UserMessage },
-    output: { temperature: number; topP: number; topK: number; options: Record<string, any> },
+    input: { sessionID: string; agent: Agent; model: Model; provider: Provider; message: UserMessage },
+    output: { temperature?: number; topP?: number; topK?: number; options: Record<string, any> },
   ) => Promise<void>
   "chat.headers"?: (
-    input: { sessionID: string; agent: string; model: Model; provider: ProviderContext; message: UserMessage },
+    input: { sessionID: string; agent: Omit<Agent, 'builtIn' | 'tools'>; model: Model; provider: Provider; message: UserMessage },
     output: { headers: Record<string, string> },
   ) => Promise<void>
-  "permission.ask"?: (input: Permission, output: { status: "ask" | "deny" | "allow" }) => Promise<void>
+  "permission.ask"?: (
+    input: {
+      id: string
+      type: string
+      pattern?: string | Array<string>
+      sessionID: string
+      messageID: string
+      callID?: string
+      message: string
+      metadata: { [key: string]: unknown }
+      time: { created: number }
+    },
+    output: { status: "ask" | "deny" | "allow" },
+  ) => Promise<void>
   "command.execute.before"?: (
     input: { command: string; sessionID: string; arguments: string },
-    output: { parts: Part[] },
+    output: { parts: Omit<Part | { id?: string }, 'sessionID' | 'messageID'>[] },
   ) => Promise<void>
   "tool.execute.before"?: (
-    input: { tool: string; sessionID: string; callID: string },
+    input: { tool: string; sessionID: string; callID?: string },
     output: { args: any },
   ) => Promise<void>
   "tool.execute.after"?: (
-    input: { tool: string; sessionID: string; callID: string },
+    input: { tool: string; sessionID: string; callID?: string },
     output: {
       title: string
       output: string
       metadata: any
-    },
+    } | undefined,
   ) => Promise<void>
   "experimental.chat.messages.transform"?: (
     input: {},