simstudioai · waleedlatif1 · Apr 16, 2026 · Apr 16, 2026 · Apr 16, 2026 · Apr 16, 2026
diff --git a/.claude/commands/you-might-not-need-a-callback.md b/.claude/commands/you-might-not-need-a-callback.md
@@ -16,17 +16,34 @@ User arguments: $ARGUMENTS
 Read before analyzing:
 1. https://react.dev/reference/react/useCallback — official docs on when useCallback is actually needed
 
+## The one rule that matters
+
+`useCallback` is only useful when **something observes the reference**. Ask: does anything care if this function gets a new identity on re-render?
+
+Observers that care about reference stability:
+- A `useEffect` that lists the function in its deps array
+- A `useMemo` that lists the function in its deps array
+- Another `useCallback` that lists the function in its deps array
+- A child component wrapped in `React.memo` that receives the function as a prop
+
+If none of those apply — if the function is only called inline, or passed to a non-memoized child, or assigned to a native element event — the reference is unobserved and `useCallback` adds overhead with zero benefit.
+
 ## Anti-patterns to detect
 
-1. **useCallback on functions not passed as props or deps**: No benefit if only called within the same component.
-2. **useCallback with deps that change every render**: Memoization is wasted.
-3. **useCallback on handlers passed to native elements**: `<button onClick={fn}>` doesn't benefit from stable references.
-4. **useCallback wrapping functions that return new objects/arrays**: Memoization at the wrong level.
-5. **useCallback with empty deps when deps are needed**: Stale closures.
-6. **Pairing useCallback + React.memo unnecessarily**: Only optimize when you've measured a problem.
-7. **useCallback in hooks that don't need stable references**: Not every hook return needs memoization.
+1. **No observer tracks the reference**: The function is only called inline in the same component, or passed to a non-memoized child, or used as a native element handler (`<button onClick={fn}>`). Nothing re-runs or bails out based on reference identity. Remove `useCallback`.
+2. **useCallback with deps that change every render**: If a dep is a plain object/array created inline, or state that changes on every interaction, memoization buys nothing — the function gets a new identity anyway.
+3. **useCallback on handlers passed only to native elements**: `<button onClick={fn}>` — React never does reference equality on native element props. No benefit.
+4. **useCallback wrapping functions that return new objects/arrays**: Stable function identity, unstable return value — memoization is at the wrong level. Use `useMemo` on the return value instead, or restructure.
+5. **useCallback with empty deps when deps are needed**: Stale closure — reads initial values forever. This is a correctness bug, not just a performance issue.
+6. **Pairing useCallback + React.memo on trivially cheap renders**: If the child renders in < 1ms and re-renders rarely, the memo infrastructure costs more than it saves.
+
+## Patterns that ARE correct — do not flag
 
-Note: This codebase uses a ref pattern for stable callbacks (`useRef` + empty deps). That pattern is correct — don't flag it.
+- `useCallback` whose result is in a `useEffect` dep array — prevents the effect from re-running on every render
+- `useCallback` whose result is in a `useMemo` dep array — prevents the memo from recomputing on every render
+- `useCallback` whose result is a dep of another `useCallback` — stabilises a callback chain
+- `useCallback` passed to a `React.memo`-wrapped child — the whole point of the pattern
+- This codebase's ref pattern: `useRef` + callback with empty deps that reads the ref inside — correct, do not flag
 
 ## Steps
 

diff --git a/apps/sim/app/workspace/[workspaceId]/components/inline-rename-input.tsx b/apps/sim/app/workspace/[workspaceId]/components/inline-rename-input.tsx
@@ -25,14 +25,15 @@ export function InlineRenameInput({ value, onChange, onSubmit, onCancel }: Inlin
       ref={inputRef}
       type='text'
       value={value}
+      size={Math.max(value.length + 2, 5)}
       onChange={(e) => onChange(e.target.value)}
       onKeyDown={(e) => {
         if (e.key === 'Enter') onSubmit()
         if (e.key === 'Escape') onCancel()
       }}
       onBlur={onSubmit}
       onClick={(e) => e.stopPropagation()}
-      className='min-w-0 flex-1 truncate border-0 bg-transparent p-0 font-medium text-[var(--text-body)] text-sm outline-none focus:outline-none focus:ring-0'
+      className='min-w-0 border-0 bg-transparent p-0 font-medium text-[var(--text-body)] text-sm outline-none focus:outline-none focus:ring-0'
     />
   )
 }
diff --git a/apps/sim/app/workspace/[workspaceId]/components/message-actions/message-actions.tsx b/apps/sim/app/workspace/[workspaceId]/components/message-actions/message-actions.tsx
@@ -1,6 +1,6 @@
 'use client'
 
-import { useCallback, useEffect, useRef, useState } from 'react'
+import { memo, useEffect, useRef, useState } from 'react'
 import {
   Button,
   Check,
@@ -50,7 +50,12 @@ interface MessageActionsProps {
   requestId?: string
 }
 
-export function MessageActions({ content, chatId, userQuery, requestId }: MessageActionsProps) {
+export const MessageActions = memo(function MessageActions({
+  content,
+  chatId,
+  userQuery,
+  requestId,
+}: MessageActionsProps) {
   const [copied, setCopied] = useState(false)
   const [copiedRequestId, setCopiedRequestId] = useState(false)
   const [pendingFeedback, setPendingFeedback] = useState<'up' | 'down' | null>(null)
@@ -70,7 +75,7 @@ export function MessageActions({ content, chatId, userQuery, requestId }: Messag
     }
   }, [])
 
-  const copyToClipboard = useCallback(async () => {
+  const copyToClipboard = async () => {
     if (!content) return
     const text = toPlainText(content)
     if (!text) return
@@ -84,9 +89,9 @@ export function MessageActions({ content, chatId, userQuery, requestId }: Messag
     } catch {
       /* clipboard unavailable */
     }
-  }, [content])
+  }
 
-  const copyRequestId = useCallback(async () => {
+  const copyRequestId = async () => {
     if (!requestId) return
     try {
       await navigator.clipboard.writeText(requestId)
@@ -98,20 +103,17 @@ export function MessageActions({ content, chatId, userQuery, requestId }: Messag
     } catch {
       /* clipboard unavailable */
     }
-  }, [requestId])
+  }
 
-  const handleFeedbackClick = useCallback(
-    (type: 'up' | 'down') => {
-      if (chatId && userQuery) {
-        setPendingFeedback(type)
-        setFeedbackText('')
-        setCopiedRequestId(false)
-      }
-    },
-    [chatId, userQuery]
-  )
+  const handleFeedbackClick = (type: 'up' | 'down') => {
+    if (chatId && userQuery) {
+      setPendingFeedback(type)
+      setFeedbackText('')
+      setCopiedRequestId(false)
+    }
+  }
 
-  const handleSubmitFeedback = useCallback(() => {
+  const handleSubmitFeedback = () => {
     if (!pendingFeedback || !chatId || !userQuery) return
     const text = feedbackText.trim()
     if (!text) {
@@ -128,15 +130,15 @@ export function MessageActions({ content, chatId, userQuery, requestId }: Messag
     })
     setPendingFeedback(null)
     setFeedbackText('')
-  }, [pendingFeedback, chatId, userQuery, content, feedbackText])
+  }
 
-  const handleModalClose = useCallback((open: boolean) => {
+  const handleModalClose = (open: boolean) => {
     if (!open) {
       setPendingFeedback(null)
       setFeedbackText('')
       setCopiedRequestId(false)
     }
-  }, [])
+  }
 
   if (!content) return null
 
@@ -224,4 +226,4 @@ export function MessageActions({ content, chatId, userQuery, requestId }: Messag
       </Modal>
     </>
   )
-}
+})
diff --git a/...orkspace/[workspaceId]/components/resource/components/resource-header/resource-header.tsx b/...orkspace/[workspaceId]/components/resource/components/resource-header/resource-header.tsx
@@ -40,6 +40,7 @@ export interface HeaderAction {
   icon?: React.ElementType
   onClick: () => void
   disabled?: boolean
+  active?: boolean
 }
 
 export interface CreateAction {
@@ -103,7 +104,13 @@ export const ResourceHeader = memo(function ResourceHeader({
                 onClick={action.onClick}
                 disabled={action.disabled}
                 variant='subtle'
-                className='px-2 py-1 text-caption'
+                className={cn(
+                  'px-2 py-1 text-caption',
+                  action.active !== undefined && 'rounded-lg',
+                  action.active === true &&
+                    'bg-[var(--surface-active)] hover-hover:bg-[var(--surface-active)]',
+                  action.active === false && 'hover-hover:bg-[var(--surface-hover)]'
+                )}
               >
                 {ActionIcon && (
                   <ActionIcon

diff --git a/...workspaceId]/components/resource/components/resource-options-bar/resource-options-bar.tsx b/...workspaceId]/components/resource/components/resource-options-bar/resource-options-bar.tsx
@@ -222,7 +222,7 @@ const SortDropdown = memo(function SortDropdown({ config }: { config: SortConfig
           Sort
         </Button>
       </DropdownMenuTrigger>
-      <DropdownMenuContent align='end'>
+      <DropdownMenuContent align='start'>
         {options.map((option) => {
           const isActive = active?.column === option.id
           const Icon = option.icon