diff --git a/apps/webapp/app/components/AskAI.tsx b/apps/webapp/app/components/AskAI.tsx
index bc64a7e0c42..96be9dd7075 100644
--- a/apps/webapp/app/components/AskAI.tsx
+++ b/apps/webapp/app/components/AskAI.tsx
@@ -543,8 +543,12 @@ function ChatInterface({ initialQuery }: { initialQuery?: string }) {
           />
           {isGeneratingAnswer ? (
             <SimpleTooltip
+              asChild
+              tabbable
               button={
-                <span
+                <button
+                  type="button"
+                  aria-label="Stop generating"
                   onClick={() => stopGeneration()}
                   className="group relative z-10 flex size-10 min-w-10 cursor-pointer items-center justify-center"
                 >
@@ -553,7 +557,7 @@ function ChatInterface({ initialQuery }: { initialQuery?: string }) {
                     className="absolute inset-0 animate-spin"
                     hoverEffect
                   />
-                </span>
+                </button>
               }
               content="Stop generating"
             />
diff --git a/apps/webapp/app/components/code/TSQLResultsTable.tsx b/apps/webapp/app/components/code/TSQLResultsTable.tsx
index 6da3caee0df..c1a627b8db8 100644
--- a/apps/webapp/app/components/code/TSQLResultsTable.tsx
+++ b/apps/webapp/app/components/code/TSQLResultsTable.tsx
@@ -843,6 +843,37 @@ function CopyableCell({
   const [isHovered, setIsHovered] = useState(false);
   const { copy, copied } = useCopy(value);
 
+  // The button (with its aria-label) always sits in the same position in the tree, wrapped by
+  // the same SimpleTooltip, so it is never unmounted/remounted on hover (which would drop
+  // keyboard focus). The tooltip is left uncontrolled so Radix opens it only when the pointer or
+  // keyboard focus is actually on the button, not whenever the pointer is anywhere in this
+  // virtualized grid's cell. `focus-visible:` (not `focus:`) ensures keyboard focus reveals the
+  // button without leaving it visible after a mouse click moves outside the cell.
+  const copyButton = (
+    <button
+      type="button"
+      aria-label={copied ? "Copied" : "Copy"}
+      onClick={(e) => {
+        e.stopPropagation();
+        e.preventDefault();
+        copy();
+      }}
+      className={cn(
+        "absolute right-1 top-1/2 z-10 flex size-6 -translate-y-1/2 items-center justify-center rounded border border-border-bright bg-background-hover transition-opacity focus-visible:pointer-events-auto focus-visible:opacity-100",
+        isHovered ? "opacity-100" : "pointer-events-none opacity-0",
+        copied
+          ? "text-green-500"
+          : "text-text-dimmed hover:border-border-bright hover:bg-background-raised hover:text-text-bright"
+      )}
+    >
+      {copied ? (
+        <ClipboardCheckIcon className="size-3.5" />
+      ) : (
+        <ClipboardIcon className="size-3.5" />
+      )}
+    </button>
+  );
+
   return (
     <div
       className={cn(
@@ -856,37 +887,13 @@ function CopyableCell({
       onMouseLeave={() => setIsHovered(false)}
     >
       <span className="flex items-center truncate">{children}</span>
-      {isHovered && (
-        <span
-          onClick={(e) => {
-            e.stopPropagation();
-            e.preventDefault();
-            copy();
-          }}
-          className="absolute right-1 top-1/2 z-10 flex -translate-y-1/2 cursor-pointer"
-        >
-          <SimpleTooltip
-            button={
-              <span
-                className={cn(
-                  "flex size-6 items-center justify-center rounded border border-border-bright bg-background-hover",
-                  copied
-                    ? "text-green-500"
-                    : "text-text-dimmed hover:border-border-bright hover:bg-background-raised hover:text-text-bright"
-                )}
-              >
-                {copied ? (
-                  <ClipboardCheckIcon className="size-3.5" />
-                ) : (
-                  <ClipboardIcon className="size-3.5" />
-                )}
-              </span>
-            }
-            content={copied ? "Copied!" : "Copy"}
-            disableHoverableContent
-          />
-        </span>
-      )}
+      <SimpleTooltip
+        asChild
+        tabbable
+        button={copyButton}
+        content={copied ? "Copied!" : "Copy"}
+        disableHoverableContent
+      />
     </div>
   );
 }
diff --git a/apps/webapp/app/components/dashboard-agent/tooltip-accessible-name.test.ts b/apps/webapp/app/components/dashboard-agent/tooltip-accessible-name.test.ts
index 361d20c456e..5c0379b1b3e 100644
--- a/apps/webapp/app/components/dashboard-agent/tooltip-accessible-name.test.ts
+++ b/apps/webapp/app/components/dashboard-agent/tooltip-accessible-name.test.ts
@@ -60,7 +60,6 @@ const NO_AS_CHILD_BASELINE = new Set([
   "app/components/GitMetadata.tsx::LinkButton",
   "app/components/code/TSQLResultsTable.tsx::TextLink",
   "app/components/integrations/VercelLink.tsx::LinkButton",
-  "app/components/primitives/CopyButton.tsx::Button",
   "app/components/runs/v3/RunTag.tsx::Link",
   "app/components/runs/v3/TaskRunsTable.tsx::DialogTrigger",
   "app/routes/account.tokens/route.tsx::DialogTrigger",
@@ -90,6 +89,16 @@ function attrOf(node: JsxNode, name: string) {
   return open.attributes.properties.find((p) => ts.isJsxAttribute(p) && p.name.getText() === name);
 }
 
+function hasStaticTrueAttribute(node: JsxNode, name: string): boolean {
+  const attribute = attrOf(node, name);
+  if (!attribute || !ts.isJsxAttribute(attribute)) return false;
+  if (!attribute.initializer) return true;
+  return (
+    ts.isJsxExpression(attribute.initializer) &&
+    attribute.initializer.expression?.kind === ts.SyntaxKind.TrueKeyword
+  );
+}
+
 /** Text anywhere under the element, ignoring an expression that can render nothing. */
 function hasText(node: TsNode): boolean {
   if (!ts.isJsxElement(node)) return false;
@@ -179,7 +188,7 @@ function scanFile(file: string, relative: string): Violation[] {
       const initializer =
         buttonAttr && ts.isJsxAttribute(buttonAttr) ? buttonAttr.initializer : undefined;
       if (initializer && ts.isJsxExpression(initializer)) {
-        const asChild = !!attrOf(node, "asChild");
+        const asChild = hasStaticTrueAttribute(node, "asChild");
         for (const trigger of resolve(initializer.expression).flatMap(triggersIn)) {
           const named =
             !!attrOf(trigger, "aria-label") ||
diff --git a/apps/webapp/app/components/primitives/ClipboardField.tsx b/apps/webapp/app/components/primitives/ClipboardField.tsx
index 622c5bde430..73facf3bcc0 100644
--- a/apps/webapp/app/components/primitives/ClipboardField.tsx
+++ b/apps/webapp/app/components/primitives/ClipboardField.tsx
@@ -1,4 +1,4 @@
-import { useEffect, useRef, useState } from "react";
+import { useEffect, useId, useState } from "react";
 import { cn } from "~/utils/cn";
 import { CopyButton } from "./CopyButton";
 
@@ -116,7 +116,7 @@ export function ClipboardField({
   fullWidth = true,
 }: ClipboardFieldProps) {
   const [isSecure, setIsSecure] = useState(secure !== undefined && secure);
-  const inputIcon = useRef<HTMLInputElement>(null);
+  const inputId = useId();
   const { container, input, buttonVariant, button, size } = variants[variant];
 
   useEffect(() => {
@@ -128,16 +128,13 @@ export function ClipboardField({
   return (
     <span className={cn(container, fullWidth ? "w-full" : "max-w-fit", className)}>
       {icon && (
-        <span
-          onClick={() => inputIcon.current && inputIcon.current.focus()}
-          className="flex items-center pl-1"
-        >
+        <label htmlFor={inputId} className="flex items-center pl-1">
           {icon}
-        </span>
+        </label>
       )}
       <input
+        id={inputId}
         type="text"
-        ref={inputIcon}
         value={isSecure ? maskedValue : value}
         readOnly={true}
         className={cn(
diff --git a/apps/webapp/app/components/primitives/CopyButton.tsx b/apps/webapp/app/components/primitives/CopyButton.tsx
index c855d4ad137..88a663dfe27 100644
--- a/apps/webapp/app/components/primitives/CopyButton.tsx
+++ b/apps/webapp/app/components/primitives/CopyButton.tsx
@@ -44,58 +44,69 @@ export function CopyButton({
 
   const { icon: iconSize, button: buttonSize } = sizes[size];
 
-  const button =
-    variant === "icon" ? (
-      <span
-        onClick={copy}
-        className={cn(
-          buttonSize,
-          "flex shrink-0 items-center justify-center rounded border border-border-bright bg-background-hover",
-          copied
-            ? "text-green-500"
-            : "text-text-dimmed hover:border-border-bright hover:bg-background-raised hover:text-text-bright",
-          buttonClassName
-        )}
-      >
-        {copied ? (
-          <ClipboardCheckIcon className={iconSize} />
-        ) : (
-          <ClipboardIcon className={iconSize} />
-        )}
+  if (variant === "button") {
+    return (
+      <span className={className}>
+        <Button
+          variant={`${buttonVariant}/${size === "extra-small" ? "small" : size}`}
+          onClick={copy}
+          className={cn("shrink-0", buttonClassName)}
+          tooltip={showTooltip ? (copied ? "Copied!" : "Copy") : undefined}
+          aria-label={children ? undefined : copied ? "Copied" : "Copy"}
+          LeadingIcon={
+            copied ? (
+              <ClipboardCheckIcon
+                className={cn(
+                  iconSize,
+                  buttonVariant === "primary" ? "text-background-dimmed" : "text-green-500"
+                )}
+              />
+            ) : (
+              <ClipboardIcon
+                className={cn(
+                  iconSize,
+                  buttonVariant === "primary" ? "text-background-dimmed" : "text-text-dimmed"
+                )}
+              />
+            )
+          }
+        >
+          {children}
+        </Button>
       </span>
-    ) : (
-      <Button
-        variant={`${buttonVariant}/${size === "extra-small" ? "small" : size}`}
-        onClick={copy}
-        className={cn("shrink-0", buttonClassName)}
-        LeadingIcon={
-          copied ? (
-            <ClipboardCheckIcon
-              className={cn(
-                iconSize,
-                buttonVariant === "primary" ? "text-background-dimmed" : "text-green-500"
-              )}
-            />
-          ) : (
-            <ClipboardIcon
-              className={cn(
-                iconSize,
-                buttonVariant === "primary" ? "text-background-dimmed" : "text-text-dimmed"
-              )}
-            />
-          )
-        }
-      >
-        {children}
-      </Button>
     );
+  }
 
-  if (!showTooltip) return <span className={className}>{button}</span>;
+  const iconButton = (
+    <button
+      type="button"
+      aria-label={copied ? "Copied" : "Copy"}
+      onClick={copy}
+      className={cn(
+        buttonSize,
+        "flex shrink-0 items-center justify-center rounded border border-border-bright bg-background-hover",
+        copied
+          ? "text-green-500"
+          : "text-text-dimmed hover:border-border-bright hover:bg-background-raised hover:text-text-bright",
+        buttonClassName
+      )}
+    >
+      {copied ? (
+        <ClipboardCheckIcon className={iconSize} />
+      ) : (
+        <ClipboardIcon className={iconSize} />
+      )}
+    </button>
+  );
+
+  if (!showTooltip) return <span className={className}>{iconButton}</span>;
 
   return (
     <span className={className}>
       <SimpleTooltip
-        button={button}
+        asChild
+        tabbable
+        button={iconButton}
         content={copied ? "Copied!" : "Copy"}
         className="font-sans"
         disableHoverableContent
diff --git a/apps/webapp/app/components/primitives/CopyableText.tsx b/apps/webapp/app/components/primitives/CopyableText.tsx
index bf5898390a3..60d4799b201 100644
--- a/apps/webapp/app/components/primitives/CopyableText.tsx
+++ b/apps/webapp/app/components/primitives/CopyableText.tsx
@@ -39,7 +39,11 @@ export function CopyableText({
 
   if (resolvedVariant === "icon-right") {
     const iconButton = (
-      <span
+      <button
+        type="button"
+        aria-label={copied ? "Copied" : "Copy"}
+        onClick={copy}
+        onMouseDown={(e) => e.stopPropagation()}
         className={cn(
           "ml-1 flex size-6 items-center justify-center rounded border border-border-bright bg-background-hover",
           asChild && "p-1",
@@ -53,7 +57,7 @@ export function CopyableText({
         ) : (
           <ClipboardIcon className="size-3.5" />
         )}
-      </span>
+      </button>
     );
 
     return (
@@ -72,24 +76,23 @@ export function CopyableText({
           {value}
         </span>
         <span
-          onClick={copy}
-          onMouseDown={(e) => e.stopPropagation()}
           className={cn(
-            "absolute top-0 z-10 size-6 font-sans",
+            "absolute top-0 z-10 flex size-6 font-sans transition-opacity has-focus-visible:pointer-events-auto has-focus-visible:opacity-100",
             // Truncated values reserve a right gutter, so the button sits inside it
             truncate ? "right-0" : "-right-6",
-            isHovered ? "flex" : "hidden"
+            isHovered ? "opacity-100" : "pointer-events-none opacity-0"
           )}
         >
           {hideTooltip ? (
             iconButton
           ) : (
             <SimpleTooltip
+              asChild
+              tabbable
               button={iconButton}
               content={copied ? "Copied!" : "Copy"}
               className="font-sans"
               disableHoverableContent
-              asChild={asChild}
             />
           )}
         </span>
diff --git a/apps/webapp/app/components/primitives/Table.tsx b/apps/webapp/app/components/primitives/Table.tsx
index 9ade6c34bc2..5eaf30f89e9 100644
--- a/apps/webapp/app/components/primitives/Table.tsx
+++ b/apps/webapp/app/components/primitives/Table.tsx
@@ -478,6 +478,37 @@ export const CopyableTableCell = forwardRef<HTMLTableCellElement, CopyableTableC
     const [isHovered, setIsHovered] = useState(false);
     const { copy, copied } = useCopy(value);
 
+    // The button (with its aria-label) always sits in the same position in the tree, wrapped by
+    // the same SimpleTooltip, so it is never unmounted/remounted on hover (which would drop
+    // keyboard focus). The tooltip is left uncontrolled so Radix opens it only when the pointer
+    // or keyboard focus is actually on the button, not whenever the pointer is anywhere in the cell.
+    // `focus-visible:` reveals keyboard focus without leaving the button visible after a mouse click
+    // moves outside the cell.
+    const copyButton = (
+      <button
+        type="button"
+        aria-label={copied ? "Copied" : "Copy"}
+        onClick={(e) => {
+          e.stopPropagation();
+          e.preventDefault();
+          copy();
+        }}
+        className={cn(
+          "absolute -right-2 top-1/2 z-10 flex size-6 -translate-y-1/2 items-center justify-center rounded border border-border-bright bg-background-hover transition-opacity focus-visible:pointer-events-auto focus-visible:opacity-100",
+          isHovered ? "opacity-100" : "pointer-events-none opacity-0",
+          copied
+            ? "text-green-500"
+            : "text-text-dimmed hover:border-border-bright hover:bg-background-raised hover:text-text-bright"
+        )}
+      >
+        {copied ? (
+          <ClipboardCheckIcon className="size-3.5" />
+        ) : (
+          <ClipboardIcon className="size-3.5" />
+        )}
+      </button>
+    );
+
     return (
       <TableCell ref={ref} className={className} {...props}>
         <div
@@ -486,37 +517,13 @@ export const CopyableTableCell = forwardRef<HTMLTableCellElement, CopyableTableC
           onMouseLeave={() => setIsHovered(false)}
         >
           {children}
-          {isHovered && (
-            <span
-              onClick={(e) => {
-                e.stopPropagation();
-                e.preventDefault();
-                copy();
-              }}
-              className="absolute -right-2 top-1/2 z-10 flex -translate-y-1/2 cursor-pointer"
-            >
-              <SimpleTooltip
-                button={
-                  <span
-                    className={cn(
-                      "flex size-6 items-center justify-center rounded border border-border-bright bg-background-hover",
-                      copied
-                        ? "text-green-500"
-                        : "text-text-dimmed hover:border-border-bright hover:bg-background-raised hover:text-text-bright"
-                    )}
-                  >
-                    {copied ? (
-                      <ClipboardCheckIcon className="size-3.5" />
-                    ) : (
-                      <ClipboardIcon className="size-3.5" />
-                    )}
-                  </span>
-                }
-                content={copied ? "Copied!" : "Copy"}
-                disableHoverableContent
-              />
-            </span>
-          )}
+          <SimpleTooltip
+            asChild
+            tabbable
+            button={copyButton}
+            content={copied ? "Copied!" : "Copy"}
+            disableHoverableContent
+          />
         </div>
       </TableCell>
     );
diff --git a/apps/webapp/app/components/runs/v3/RunTag.tsx b/apps/webapp/app/components/runs/v3/RunTag.tsx
index 16d2333632e..379c89b073b 100644
--- a/apps/webapp/app/components/runs/v3/RunTag.tsx
+++ b/apps/webapp/app/components/runs/v3/RunTag.tsx
@@ -113,13 +113,17 @@ function CopyButton({ textToCopy, isHovered }: { textToCopy: string; isHovered:
 
   return (
     <SimpleTooltip
+      asChild
+      tabbable
       button={
-        <span
+        <button
+          type="button"
+          aria-label={copied ? "Copied" : "Copy tag"}
           onClick={copy}
           onMouseDown={(e) => e.stopPropagation()}
           className={cn(
-            "absolute -right-6 top-0 z-10 size-6 items-center justify-center rounded-r-sm border-y border-r border-border-bright bg-background-hover",
-            isHovered ? "flex" : "hidden",
+            "absolute -right-6 top-0 z-10 flex size-6 items-center justify-center rounded-r-sm border-y border-r border-border-bright bg-background-hover transition-opacity focus-visible:pointer-events-auto focus-visible:opacity-100",
+            isHovered ? "opacity-100" : "pointer-events-none opacity-0",
             copied
               ? "text-green-500"
               : "text-text-dimmed hover:border-border-bright hover:bg-background-raised hover:text-text-bright"
@@ -130,7 +134,7 @@ function CopyButton({ textToCopy, isHovered }: { textToCopy: string; isHovered:
           ) : (
             <ClipboardIcon className="size-3.5" />
           )}
-        </span>
+        </button>
       }
       content={copied ? "Copied!" : "Copy tag"}
       disableHoverableContent
@@ -158,18 +162,22 @@ function DeleteButton({
 
   return (
     <SimpleTooltip
+      asChild
+      tabbable
       button={
-        <span
+        <button
+          type="button"
+          aria-label="Remove tag"
           onClick={handleDelete}
           onMouseDown={(e) => e.stopPropagation()}
           className={cn(
-            "absolute -right-6 top-0 z-10 size-6 items-center justify-center rounded-r-sm border-y border-r border-border-bright bg-background-hover",
-            isHovered ? "flex" : "hidden",
+            "absolute -right-6 top-0 z-10 flex size-6 items-center justify-center rounded-r-sm border-y border-r border-border-bright bg-background-hover transition-opacity focus-visible:pointer-events-auto focus-visible:opacity-100",
+            isHovered ? "opacity-100" : "pointer-events-none opacity-0",
             "text-text-dimmed hover:border-border-bright hover:bg-background-raised hover:text-rose-400"
           )}
         >
           <XIcon className="size-3.5" />
-        </span>
+        </button>
       }
       content="Remove tag"
       disableHoverableContent