diff --git a/packages/opencode/src/npmcli-config.d.ts b/packages/opencode/src/npmcli-config.d.ts
new file mode 100644
index 0000000000..c9b20517ad
--- /dev/null
+++ b/packages/opencode/src/npmcli-config.d.ts
@@ -0,0 +1,43 @@
+declare module "@npmcli/config" {
+  type Data = Record<string, unknown>
+  type Where = "default" | "builtin" | "global" | "user" | "project" | "env" | "cli"
+
+  namespace Config {
+    interface Options {
+      definitions: Data
+      shorthands: Record<string, string | string[]>
+      npmPath: string
+      flatten?: (input: Data, flat?: Data) => Data
+      nerfDarts?: string[]
+      argv?: string[]
+      cwd?: string
+      env?: NodeJS.ProcessEnv
+      execPath?: string
+      platform?: NodeJS.Platform
+      warn?: boolean
+    }
+  }
+
+  class Config {
+    constructor(input: Config.Options)
+
+    readonly data: Map<Where, { source: string | null }>
+    readonly flat: Data
+
+    load(): Promise<void>
+  }
+
+  export = Config
+}
+
+declare module "@npmcli/config/lib/definitions" {
+  export const definitions: Record<string, unknown>
+  export const shorthands: Record<string, string | string[]>
+  export const flatten: (input: Record<string, unknown>, flat?: Record<string, unknown>) => Record<string, unknown>
+  export const nerfDarts: string[]
+  export const proxyEnv: string[]
+}
+
+declare module "@npmcli/config/lib/definitions/index.js" {
+  export * from "@npmcli/config/lib/definitions"
+}