slash commands (#2157)

Co-authored-by: adamdotdevin <2363879+adamdottv@users.noreply.github.com>

packages/opencode/src/command/index.ts

@@ -0,0 +1,44 @@
+import z from "zod"
+import { App } from "../app/app"
+import { Config } from "../config/config"
+
+export namespace Command {
+  export const Info = z
+    .object({
+      name: z.string(),
+      description: z.string().optional(),
+      agent: z.string().optional(),
+      model: z.string().optional(),
+      template: z.string(),
+    })
+    .openapi({
+      ref: "Command",
+    })
+  export type Info = z.infer<typeof Info>
+
+  const state = App.state("command", async () => {
+    const cfg = await Config.get()
+
+    const result: Record<string, Info> = {}
+
+    for (const [name, command] of Object.entries(cfg.command ?? {})) {
+      result[name] = {
+        name,
+        agent: command.agent,
+        model: command.model,
+        description: command.description,
+        template: command.template,
+      }
+    }
+
+    return result
+  })
+
+  export async function get(name: string) {
+    return state().then((x) => x[name])
+  }
+
+  export async function list() {
+    return state().then((x) => Object.values(x))
+  }
+}