#34

frontend/AGENTS.md

@@ -126,9 +126,38 @@ pass or the remaining failure is clearly blocked.
 
 - Preserve compact TSX expression shapes such as inline ternary branches and
   closing `</div>)` forms when nearby code uses them.
+- Treat TSX formatting rules as hard constraints, not preferences. Before
+  finishing a TSX edit, inspect the edited hunks for closing `)`, `]`, and `}`
+  placement and fix violations instead of relying on formatter defaults.
 - For long Tailwind `className` strings, wrap across lines only when needed.
 - Keep continuation indentation aligned with the 4-space logical indentation
   rule, using tabs only as leading 8-space compression.
+- In TypeScript and TSX function declarations, including `const` arrow
+  function declarations, when the parameter list spans multiple lines, always
+  put the closing parenthesis at the beginning of its own line before the return
+  type or `=>`. Do not put that closing `)` at the end of the previous line.
+- Do not write React component declarations in the common Prettier form
+  `const Component = ({ ... }) => (` when the destructured parameter spans
+  multiple lines. Use the project form with the opening `(` after `=`, the
+  destructured object as the argument, and the closing parameter `)` on its own
+  line before `=>`.
+- In TypeScript and TSX, never place a closing parenthesis at the beginning of
+  a line except for a multi-line function declaration parameter list.
+- Never place a closing square bracket at the beginning of a line.
+- For object literals, type literals, import/export named bindings, destructuring
+  patterns, and other associative-array-style braces, do not place the closing
+  brace at the beginning of a line. Keep `}` on the same line as the final
+  property, binding, or specifier unless that would violate the line limit.
+  Function, lambda, callback, and block closing braces are exempt and should
+  stay on their own line when that fits the local style. When a function,
+  lambda, callback, or block body spans multiple lines, do not put its closing
+  `}` at the end of the previous line.
+- For arrays and tuple-like lists, do not place the closing `]` at the
+  beginning of a line. Keep `]` on the same line as the final element unless
+  that would violate the line limit.
+- For function and method calls, do not place the closing `)` at the beginning
+  of a line. The only TypeScript/TSX exception is the closing parameter `)` of a
+  multi-line function declaration.
 - Do not add braces around `if`, `else`, or `for` bodies when the body is a
   single physical line.
 - Always add braces around `if`, `else`, or `for` bodies when the body spans