refactor(packages): extract utils package

src/shared/replace-tool-args.ts

@@ -1,16 +1 @@
-/**
- * Safely replace tool arguments without mutating frozen objects.
- *
- * opencode >=1.14 may freeze `output.args` via Immer before plugin hooks run.
- * Direct property assignment (`output.args.key = value`) or `Object.assign(output.args, patch)`
- * throws `TypeError: Attempted to assign to readonly property` on a frozen object.
- *
- * This helper replaces `output.args` with a shallow clone containing the patch,
- * which works regardless of whether the original args object is frozen.
- */
-export function replaceToolArgs(
-	output: { args: Record<string, unknown> },
-	patch: Record<string, unknown>,
-): void {
-	output.args = { ...output.args, ...patch }
-}
+export { replaceToolArgs } from "@oh-my-opencode/utils"