#399

AGENTS.md

@@ -285,6 +285,13 @@ case 'no':
   Ruby-style numbered parameter names. Reserve numbered parameters for Ruby.
   Use a meaningful callback parameter name such as `row`, `item`, `value`,
   `entry`, or `result`.
+- In JavaScript, JSX, TypeScript, and TSX, use `cn` from `@/lib/utils`
+  whenever `className` combines multiple values, conditional classes, or a
+  caller-provided `className` prop.
+- Do not construct `className` with template literals, `${ ... }`, string
+  concatenation, arrays joined with spaces, or feature-local class-merging
+  helpers.
+- A static `className="..."` containing only fixed classes does not need `cn`.
 - If code appears to need a distinction between `null` and `undefined`, treat
   that as a design smell and revise the logic to avoid the distinction.
   External library APIs that explicitly require distinguishing the two are the
@@ -460,6 +467,12 @@ and layout reuse, follow `frontend/AGENTS.md`.
   structure, control flow, or variable mutability unless the requested style
   explicitly requires it.
 - Do not add production dependencies without explicit approval.
+- Do not add user-facing copy, helper text, descriptions, notes, tooltips,
+  placeholders, empty-state messages, loading messages, or explanatory text
+  unless the user explicitly specified the wording.
+- When new user-facing wording appears necessary, ask the user for the exact
+  wording and placement before implementing it.
+- Do not invent replacement copy when removing unrequested wording.
 - Do not create, modify, or run tests unless the user explicitly asks for
   test work. When the user asks for tests, keep working and rerun them until
   they pass or the remaining failure is clearly blocked.