1 files changed, 56 insertions, 0 deletions
diff --git a/packages/plugin/src/index.ts b/packages/plugin/src/index.ts
new file mode 100644
index 000000000..9040fb517
--- /dev/null
+++ b/packages/plugin/src/index.ts
@@ -0,0 +1,56 @@
+import type { Event, createOpencodeClient, App, Model, Provider, Permission, UserMessage, Part } from "@opencode-ai/sdk"
+import { $ } from "bun"
+
+export type PluginInput = {
+  client: ReturnType<typeof createOpencodeClient>
+  app: App
+  $: $
+}
+export type Plugin = (input: PluginInput) => Promise<Hooks>
+
+export interface Hooks {
+  event?: (input: { event: Event }) => Promise<void>
+  chat?: {
+    /**
+     * Called when a new message is received
+     */
+    message?: (input: {}, output: { message: UserMessage; parts: Part[] }) => Promise<void>
+    /**
+     * Modify parameters sent to LLM
+     */
+    params?: (
+      input: { model: Model; provider: Provider; message: UserMessage },
+      output: { temperature: number; topP: number },
+    ) => Promise<void>
+  }
+  permission?: {
+    /**
+     * Called when a permission is asked
+     */
+    ask?: (input: Permission, output: { status: "ask" | "deny" | "allow" }) => Promise<void>
+  }
+  tool?: {
+    execute?: {
+      /**
+       * Called before a tool is executed
+       */
+      before?: (
+        input: { tool: string; sessionID: string; callID: string },
+        output: {
+          args: any
+        },
+      ) => Promise<void>
+      /**
+       * Called after a tool is executed
+       */
+      after?: (
+        input: { tool: string; sessionID: string; callID: string },
+        output: {
+          title: string
+          output: string
+          metadata: any
+        },
+      ) => Promise<void>
+    }
+  }
+}