diff --git a/AGENTS.md b/AGENTS.md
index cd39f59..dcacb70 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -130,3 +130,4 @@ Server functions use `index.server.ts` alongside `index.tsx` (e.g. `single-docum
 - **UNCHANGEABLE RULE — twui components always win over raw JSX elements.** ALWAYS use twui components (`H1`–`H5`, `P`, `Span`, `List`, `Img`, `Row`, `Stack`, `Container`, `Section`, `Border`, `Card`, `Button`, `Tag`, `Link`, etc.) before basic JSX elements (`<h1>`–`<h6>`, `<p>`, `<span>`, `<ul>`, `<li>`, `<img>`, `<a>`, `<button>`, `<div>`-as-card, etc.). Never introduce or reintroduce a raw JSX element where a twui equivalent exists. Override twui defaults via `className` (e.g. `mb-0!`) rather than reaching for the raw element.
 - **UNCHANGEABLE RULE — twui components are preferred over shadcn/ui components.** Use twui before `src/components/ui/*` (shadcn) whenever a twui equivalent exists. The long-term goal is to phase out shadcn/ui entirely — do not introduce new shadcn usage where twui covers the need, and prefer migrating existing shadcn call sites to twui when touching them anyway.
 - **LIMIT EDITS TO `src/components/twui/`** — it is a general, publishable library shared across projects (its own `package.json`), not scoped to this repo. Do not modify its components unless strictly necessary. Customize/appearance overrides for this project belong in `src/styles/globals.css` (e.g. tweaking `.twui-card`, `--color-*` tokens, font/type styles) rather than editing twui source files.
+- **twui `Input`/`Textarea`: prefer `defaultValue` over `value`.** The component manages internal state and patches the DOM directly (`src/components/twui/form/Input/index.tsx`), so `value` is not a true controlled prop — a static `value` gets reverted on every re-render, wiping in-progress edits. `value` only works well when the parent updates it on each change (live display), not for pre-filling an editable field. Use `defaultValue` to pre-fill editable inputs; `onChange`/`changeHandler` still fire.