diff --git a/docs/release-control/v6/internal/subsystems/ai-runtime.md b/docs/release-control/v6/internal/subsystems/ai-runtime.md
index 6ec48e166..cc49d2de5 100644
--- a/docs/release-control/v6/internal/subsystems/ai-runtime.md
+++ b/docs/release-control/v6/internal/subsystems/ai-runtime.md
@@ -52,7 +52,6 @@ leave the transcript without exposing hidden provider/tool metadata.
 4. `internal/api/ai_handler.go` shared with `api-contracts`: Pulse Assistant handlers are both an AI runtime control surface and a canonical API payload contract boundary.
 5. `internal/api/ai_handlers.go` shared with `api-contracts`: AI settings and remediation handlers are both an AI runtime control surface and a canonical API payload contract boundary.
 6. `internal/api/ai_intelligence_handlers.go` shared with `api-contracts`: AI intelligence handlers are both an AI runtime control surface and a canonical API payload contract boundary.
-
 ## Extension Points
 
 Guest-family AI runtime code paths (VMs and LXC system containers) share
@@ -103,6 +102,13 @@ activity has arrived, and keeping successful raw output behind the details
 disclosure by default once the turn completes. Pending tools, skipped/canceled
 tools, failed tools, and completed-turn tool details must remain
 visible/inspectable; failed output may render inline because it is actionable.
+AI Chat icon-only actions own Assistant/session semantics, labels, and
+handlers, but their visible button chrome must compose the shared
+`ActionIconButton` primitive from `frontend-modern/src/components/shared/Button.tsx`.
+Header utilities, session row controls, transcript fallback close/download
+controls, activity-dock queued follow-up actions, composer send, footer
+help/route actions, and compact dismiss controls must not recreate local
+h-6/h-7/h-8/h-9 icon-button class shells.
 
 Assistant live workflow status follows OpenCode's current-state timeline
 model. CANONICAL (supersedes the per-row transcript-status rules elsewhere in
diff --git a/docs/release-control/v6/internal/subsystems/frontend-primitives.md b/docs/release-control/v6/internal/subsystems/frontend-primitives.md
index 753d9d1cb..8cd2c4c97 100644
--- a/docs/release-control/v6/internal/subsystems/frontend-primitives.md
+++ b/docs/release-control/v6/internal/subsystems/frontend-primitives.md
@@ -557,6 +557,12 @@ not a replacement status card, CTA band, or page-local nested card.
    disabled treatment, title fallback, and accessible name wiring must come
    from that shared primitive rather than page-local `<button>` plus inline SVG
    shells.
+   AI Chat follows that same boundary for drawer header controls, session row
+   actions, transcript fallback close/download actions, activity-dock queued
+   follow-up controls, composer send, footer help/route actions, and compact
+   dismiss controls: the Assistant owns chat/session behavior and copy, while
+   `ActionIconButton` owns h-6/h-7/h-8/h-9 sizing, outline, primary, accent,
+   warning, info, danger, disabled, title, and focus chrome.
    Global app-shell prompts are part of the same action boundary.
    `frontend-modern/src/components/GitHubStarBanner.tsx` may own its display
    timing, product copy, and GitHub destination, but its primary, defer, and
diff --git a/frontend-modern/scripts/shared-template-registry.json b/frontend-modern/scripts/shared-template-registry.json
index 7a47f399a..9e831b4b3 100644
--- a/frontend-modern/scripts/shared-template-registry.json
+++ b/frontend-modern/scripts/shared-template-registry.json
@@ -1257,6 +1257,7 @@
         { "path": "src/components/Alerts/AlertResourceTableMobile.tsx" },
         { "path": "src/components/Alerts/AlertResourceTableRow.tsx" },
         { "path": "src/components/Alerts/ResourceTable.tsx" },
+        { "path": "src/components/AI/Chat/index.tsx" },
         { "path": "src/components/Settings/RolesPanel.tsx" },
         { "path": "src/components/Settings/SSOProvidersPanel.tsx" }
       ],
@@ -1290,6 +1291,21 @@
             "text-slate-400 hover:text-white bg-surface hover:bg-slate-700 rounded-full p-1.5"
           ]
         },
+        {
+          "path": "src/components/AI/Chat/index.tsx",
+          "patterns": [
+            "flex h-8 w-8 flex-shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content disabled:cursor-not-allowed disabled:opacity-50 disabled:hover:bg-surface disabled:hover:text-muted",
+            "flex-shrink-0 p-2 hover:text-base-content rounded-md hover:bg-surface-hover transition-colors",
+            "inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950 disabled:cursor-wait disabled:opacity-70 dark:text-blue-200 dark:hover:bg-blue-900/60",
+            "rounded p-1 text-muted opacity-0 transition-opacity hover:bg-blue-100 hover:text-blue-600 focus:opacity-100 group-hover:opacity-100 group-focus-within:opacity-100 dark:hover:bg-blue-900 dark:hover:text-blue-300",
+            "order-2 flex h-9 w-9 flex-shrink-0 items-center justify-center rounded-md hover:text-base-content hover:bg-surface-hover transition-colors sm:order-none",
+            "flex h-7 w-7 items-center justify-center rounded-md border border-amber-200 bg-surface text-amber-700 transition-colors hover:bg-amber-100 hover:text-amber-900 dark:border-amber-800 dark:bg-amber-950/60 dark:text-amber-200 dark:hover:bg-amber-900",
+            "flex h-7 w-7 items-center justify-center rounded-md text-amber-700 transition-colors hover:bg-amber-100 hover:text-amber-900 dark:text-amber-200 dark:hover:bg-amber-900",
+            "inline-flex h-6 w-6 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950 dark:text-blue-200 dark:hover:bg-blue-900/60",
+            "flex h-9 w-9 items-center justify-center rounded-md bg-blue-600 text-white shadow-sm transition-colors hover:bg-blue-700 disabled:cursor-not-allowed disabled:opacity-45",
+            "flex h-7 w-7 shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content focus:outline-none focus:ring-2 focus:ring-blue-500/30"
+          ]
+        },
         {
           "path": "src/components/Settings/SSOProvidersPanel.tsx",
           "patterns": [
@@ -3170,6 +3186,136 @@
         "scripts/shared-template-audit.mjs"
       ]
     },
+    {
+      "id": "ai-chat-action-icon-header-local-shell",
+      "category": "action-button",
+      "summary": "AI Chat header icon actions must not recreate local h-8 bordered icon-button shells; compose ActionIconButton.",
+      "canonical": {
+        "path": "src/components/shared/Button.tsx",
+        "export": "ActionIconButton"
+      },
+      "scopes": ["src/components/AI/Chat"],
+      "extensions": [".tsx"],
+      "allPatterns": [
+        "flex h-8 w-8 flex-shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content"
+      ],
+      "legacyReason": "Retired migration debt. AI Chat header icon actions belong to ActionIconButton.",
+      "allowedPaths": [],
+      "ignoredPaths": [
+        "src/components/AI/Chat/__tests__/AIChat.test.tsx",
+        "src/components/shared/Button.test.tsx"
+      ],
+      "proof": [
+        "src/components/shared/SharedPrimitives.guardrails.test.ts",
+        "src/components/shared/Button.test.tsx",
+        "src/components/AI/Chat/__tests__/AIChat.test.tsx",
+        "scripts/shared-template-audit.mjs"
+      ]
+    },
+    {
+      "id": "ai-chat-action-icon-accent-local-shell",
+      "category": "action-button",
+      "summary": "AI Chat queued follow-up and session accent icon actions must not recreate local blue h-6/h-7 icon-button shells; compose ActionIconButton.",
+      "canonical": {
+        "path": "src/components/shared/Button.tsx",
+        "export": "ActionIconButton"
+      },
+      "scopes": ["src/components/AI/Chat"],
+      "extensions": [".tsx"],
+      "allPatterns": [
+        "inline-flex h-6 w-6 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950"
+      ],
+      "legacyReason": "Retired migration debt. AI Chat accent icon actions belong to ActionIconButton.",
+      "allowedPaths": [],
+      "ignoredPaths": [
+        "src/components/AI/Chat/__tests__/AIChat.test.tsx",
+        "src/components/shared/Button.test.tsx"
+      ],
+      "proof": [
+        "src/components/shared/SharedPrimitives.guardrails.test.ts",
+        "src/components/shared/Button.test.tsx",
+        "src/components/AI/Chat/__tests__/AIChat.test.tsx",
+        "scripts/shared-template-audit.mjs"
+      ]
+    },
+    {
+      "id": "ai-chat-action-icon-primary-send-local-shell",
+      "category": "action-button",
+      "summary": "AI Chat composer send action must not recreate the local primary icon-button shell; compose ActionIconButton.",
+      "canonical": {
+        "path": "src/components/shared/Button.tsx",
+        "export": "ActionIconButton"
+      },
+      "scopes": ["src/components/AI/Chat"],
+      "extensions": [".tsx"],
+      "allPatterns": [
+        "flex h-9 w-9 items-center justify-center rounded-md bg-blue-600 text-white shadow-sm transition-colors hover:bg-blue-700"
+      ],
+      "legacyReason": "Retired migration debt. AI Chat primary icon actions belong to ActionIconButton.",
+      "allowedPaths": [],
+      "ignoredPaths": [
+        "src/components/AI/Chat/__tests__/AIChat.test.tsx",
+        "src/components/shared/Button.test.tsx"
+      ],
+      "proof": [
+        "src/components/shared/SharedPrimitives.guardrails.test.ts",
+        "src/components/shared/Button.test.tsx",
+        "src/components/AI/Chat/__tests__/AIChat.test.tsx",
+        "scripts/shared-template-audit.mjs"
+      ]
+    },
+    {
+      "id": "ai-chat-action-icon-warning-local-shell",
+      "category": "action-button",
+      "summary": "AI Chat transcript fallback warning icon actions must not recreate local amber icon-button shells; compose ActionIconButton.",
+      "canonical": {
+        "path": "src/components/shared/Button.tsx",
+        "export": "ActionIconButton"
+      },
+      "scopes": ["src/components/AI/Chat"],
+      "extensions": [".tsx"],
+      "allPatterns": [
+        "flex h-7 w-7 items-center justify-center rounded-md border border-amber-200 bg-surface text-amber-700 transition-colors hover:bg-amber-100"
+      ],
+      "legacyReason": "Retired migration debt. AI Chat warning icon actions belong to ActionIconButton.",
+      "allowedPaths": [],
+      "ignoredPaths": [
+        "src/components/AI/Chat/__tests__/AIChat.test.tsx",
+        "src/components/shared/Button.test.tsx"
+      ],
+      "proof": [
+        "src/components/shared/SharedPrimitives.guardrails.test.ts",
+        "src/components/shared/Button.test.tsx",
+        "src/components/AI/Chat/__tests__/AIChat.test.tsx",
+        "scripts/shared-template-audit.mjs"
+      ]
+    },
+    {
+      "id": "ai-chat-action-icon-footer-local-shell",
+      "category": "action-button",
+      "summary": "AI Chat composer footer icon actions must not recreate local bordered h-7 icon-button shells; compose ActionIconButton.",
+      "canonical": {
+        "path": "src/components/shared/Button.tsx",
+        "export": "ActionIconButton"
+      },
+      "scopes": ["src/components/AI/Chat"],
+      "extensions": [".tsx"],
+      "allPatterns": [
+        "flex h-7 w-7 shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content"
+      ],
+      "legacyReason": "Retired migration debt. AI Chat footer icon actions belong to ActionIconButton.",
+      "allowedPaths": [],
+      "ignoredPaths": [
+        "src/components/AI/Chat/__tests__/AIChat.test.tsx",
+        "src/components/shared/Button.test.tsx"
+      ],
+      "proof": [
+        "src/components/shared/SharedPrimitives.guardrails.test.ts",
+        "src/components/shared/Button.test.tsx",
+        "src/components/AI/Chat/__tests__/AIChat.test.tsx",
+        "scripts/shared-template-audit.mjs"
+      ]
+    },
     {
       "id": "settings-connection-editor-local-warning-callout-shell",
       "category": "callout",
diff --git a/frontend-modern/src/components/AI/Chat/__tests__/AIChat.test.tsx b/frontend-modern/src/components/AI/Chat/__tests__/AIChat.test.tsx
index cbf99259e..f497d729c 100644
--- a/frontend-modern/src/components/AI/Chat/__tests__/AIChat.test.tsx
+++ b/frontend-modern/src/components/AI/Chat/__tests__/AIChat.test.tsx
@@ -4,6 +4,7 @@ import { Show, createSignal } from 'solid-js';
 import type { ChatMessage, ModelInfo, ModelRouteRecoveryOption } from '../types';
 import type { QueuedFollowUp } from '../hooks/useChat';
 import { WORKFLOW_STATUS_PACE_MS } from '../workflowStatusDisplay';
+import aiChatSource from '../index.tsx?raw';
 import { logger } from '@/utils/logger';
 
 // ── Hoisted mocks (vi.mock factories reference these) ──────────────────────
@@ -548,6 +549,28 @@ describe('AIChat', () => {
   // ── Rendering ──────────────────────────────────────────────────────────
 
   describe('rendering', () => {
+    it('keeps icon-only action chrome on the shared ActionIconButton primitive', () => {
+      expect(aiChatSource).toContain(
+        "import { ActionIconButton } from '@/components/shared/Button';",
+      );
+      expect(aiChatSource).toContain('<ActionIconButton');
+      for (const retiredActionIconShell of [
+        'flex h-8 w-8 flex-shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content disabled:cursor-not-allowed disabled:opacity-50 disabled:hover:bg-surface disabled:hover:text-muted',
+        'flex-shrink-0 p-2 hover:text-base-content rounded-md hover:bg-surface-hover transition-colors',
+        'inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950 disabled:cursor-wait disabled:opacity-70 dark:text-blue-200 dark:hover:bg-blue-900/60',
+        'rounded p-1 text-muted opacity-0 transition-opacity hover:bg-blue-100 hover:text-blue-600 focus:opacity-100 group-hover:opacity-100 group-focus-within:opacity-100 dark:hover:bg-blue-900 dark:hover:text-blue-300',
+        'order-2 flex h-9 w-9 flex-shrink-0 items-center justify-center rounded-md hover:text-base-content hover:bg-surface-hover transition-colors sm:order-none',
+        'flex h-7 w-7 items-center justify-center rounded-md border border-amber-200 bg-surface text-amber-700 transition-colors hover:bg-amber-100 hover:text-amber-900 dark:border-amber-800 dark:bg-amber-950/60 dark:text-amber-200 dark:hover:bg-amber-900',
+        'flex h-7 w-7 items-center justify-center rounded-md text-amber-700 transition-colors hover:bg-amber-100 hover:text-amber-900 dark:text-amber-200 dark:hover:bg-amber-900',
+        'inline-flex h-6 w-6 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950 dark:text-blue-200 dark:hover:bg-blue-900/60',
+        'flex h-9 w-9 items-center justify-center rounded-md bg-blue-600 text-white shadow-sm transition-colors hover:bg-blue-700 disabled:cursor-not-allowed disabled:opacity-45',
+        'flex h-7 w-7 shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content focus:outline-none focus:ring-2 focus:ring-blue-500/30',
+        'disabled:opacity-45',
+      ]) {
+        expect(aiChatSource).not.toContain(retiredActionIconShell);
+      }
+    });
+
     it('renders the header with title when open', () => {
       renderChat();
       expect(screen.getByText('Pulse Assistant')).toBeInTheDocument();
@@ -2102,17 +2125,15 @@ describe('AIChat', () => {
     });
 
     it('searches Assistant sessions from /sessions arguments without sending a provider prompt', async () => {
-      mockAIChatAPI.listSessions
-        .mockResolvedValueOnce([])
-        .mockResolvedValueOnce([
-          {
-            id: 's-backup',
-            title: 'Backup Patrol Follow-up',
-            created_at: '',
-            updated_at: '',
-            message_count: 3,
-          },
-        ]);
+      mockAIChatAPI.listSessions.mockResolvedValueOnce([]).mockResolvedValueOnce([
+        {
+          id: 's-backup',
+          title: 'Backup Patrol Follow-up',
+          created_at: '',
+          updated_at: '',
+          message_count: 3,
+        },
+      ]);
 
       renderChat();
       await waitFor(() => {
@@ -2846,10 +2867,7 @@ describe('AIChat', () => {
       });
 
       await waitFor(() => expect(document.activeElement).toBe(queuedRow));
-      expect(queuedRow).toHaveAttribute(
-        'data-assistant-queue-command-target',
-        'true',
-      );
+      expect(queuedRow).toHaveAttribute('data-assistant-queue-command-target', 'true');
       expect(textarea.value).toBe('');
     });
 
@@ -5689,7 +5707,9 @@ describe('AIChat', () => {
         'Selected route connection failed before any output; retrying. · attempt 2/3 · retrying in 1.9s',
       );
       expect(
-        screen.getByTestId('assistant-activity-dock').querySelector('[data-status-kind="retrying"]'),
+        screen
+          .getByTestId('assistant-activity-dock')
+          .querySelector('[data-status-kind="retrying"]'),
       ).not.toBeNull();
     });
 
diff --git a/frontend-modern/src/components/AI/Chat/index.tsx b/frontend-modern/src/components/AI/Chat/index.tsx
index 0ae25ce41..b04606c66 100644
--- a/frontend-modern/src/components/AI/Chat/index.tsx
+++ b/frontend-modern/src/components/AI/Chat/index.tsx
@@ -41,6 +41,7 @@ import {
   type ChatSession,
   type ChatSessionHandoffSummary,
 } from '@/api/aiChat';
+import { ActionIconButton } from '@/components/shared/Button';
 import { SearchField } from '@/components/shared/SearchField';
 import { notificationStore } from '@/stores/notifications';
 import { aiChatStore, type AIChatContext } from '@/stores/aiChat';
@@ -153,9 +154,7 @@ import { AssistantCommandHelpDialog } from './AssistantCommandHelpDialog';
 import { ModelSelector } from './ModelSelector';
 import { MentionAutocomplete, type MentionResource } from './MentionAutocomplete';
 import { SlashCommandAutocomplete } from './SlashCommandAutocomplete';
-import {
-  getAssistantActiveTurnStatus,
-} from './activeTurnStatus';
+import { getAssistantActiveTurnStatus } from './activeTurnStatus';
 import {
   createPacedWorkflowStatus,
   replaceLatestWorkflowStatusEventForDisplay,
@@ -1588,8 +1587,7 @@ export const AIChat: Component<AIChatProps> = (props) => {
       (firstQueued ? queuedFollowUpRowRefs.get(firstQueued.id) : undefined) ||
       document.querySelector<HTMLElement>('[data-testid="assistant-queued-follow-up-row"]');
     const queuedRow = findQueuedRow();
-    const targetQueuedId =
-      firstQueued?.id ?? queuedRow?.dataset.assistantQueuedFollowUpId ?? null;
+    const targetQueuedId = firstQueued?.id ?? queuedRow?.dataset.assistantQueuedFollowUpId ?? null;
 
     if (!firstQueued && !queuedRow) {
       markQueuedFollowUpCommandTarget(null);
@@ -2269,10 +2267,7 @@ export const AIChat: Component<AIChatProps> = (props) => {
       return true;
     }
 
-    const modelRoute = normalizeAssistantModelRouteArgument(
-      target,
-      knownAssistantModelProviders(),
-    );
+    const modelRoute = normalizeAssistantModelRouteArgument(target, knownAssistantModelProviders());
     if (!modelRoute) {
       openModelSelector(target);
       focusComposer();
@@ -2370,7 +2365,10 @@ export const AIChat: Component<AIChatProps> = (props) => {
         logger.error('[AIChat] Failed to load AI settings:', settingsResult.reason);
       }
       if (modelsResult.status === 'rejected') {
-        logger.debug('[AIChat] Model catalog unavailable during initialization:', modelsResult.reason);
+        logger.debug(
+          '[AIChat] Model catalog unavailable during initialization:',
+          modelsResult.reason,
+        );
       }
     } catch (error) {
       logger.error('[AIChat] Failed to initialize:', error);
@@ -2472,17 +2470,14 @@ export const AIChat: Component<AIChatProps> = (props) => {
   const activeWorkflowStatusHistory = createMemo(() => {
     const message = activeAssistantMessage();
     if (!message || message.isStreaming === false) return [];
-    return message.workflowStatusHistory || (message.workflowStatus ? [message.workflowStatus] : []);
+    return (
+      message.workflowStatusHistory || (message.workflowStatus ? [message.workflowStatus] : [])
+    );
   });
   const activeWorkflowStatusPaceSequenceKey = createMemo(() => {
     const message = activeAssistantMessage();
     const first = activeWorkflowStatusHistory()[0];
-    return [
-      message?.id,
-      first?.phase,
-      first?.message,
-      first?.startedAt,
-    ]
+    return [message?.id, first?.phase, first?.message, first?.startedAt]
       .map((value) => String(value ?? ''))
       .join(':');
   });
@@ -3961,22 +3956,18 @@ export const AIChat: Component<AIChatProps> = (props) => {
               </button>
 
               <Show when={assistantNotificationsSupported()}>
-                <button
-                  type="button"
+                <ActionIconButton
                   onClick={() => {
                     void handleToggleAttentionNotifications();
                   }}
-                  class={`flex h-8 w-8 flex-shrink-0 items-center justify-center rounded-md border border-border transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content ${
-                    assistantNotificationsEnabled()
-                      ? 'bg-surface-alt text-base-content'
-                      : 'bg-surface text-muted'
-                  }`}
+                  tone={assistantNotificationsEnabled() ? 'outlineSelected' : 'outline'}
+                  size="md"
+                  label="Toggle Assistant attention notifications"
                   title={
                     assistantNotificationsEnabled()
                       ? 'Notifications on: you are alerted when the Assistant finishes or needs you while this tab is in the background'
                       : 'Notify me when the Assistant finishes or needs me while this tab is in the background'
                   }
-                  aria-label="Toggle Assistant attention notifications"
                   aria-pressed={assistantNotificationsEnabled()}
                 >
                   <Show
@@ -3985,18 +3976,18 @@ export const AIChat: Component<AIChatProps> = (props) => {
                   >
                     <BellIcon class="h-4 w-4" aria-hidden="true" />
                   </Show>
-                </button>
+                </ActionIconButton>
               </Show>
 
-              <button
-                type="button"
+              <ActionIconButton
                 onClick={() => {
                   void handleForkSession();
                 }}
                 disabled={!canForkCurrentSession()}
-                class="flex h-8 w-8 flex-shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content disabled:cursor-not-allowed disabled:opacity-50 disabled:hover:bg-surface disabled:hover:text-muted"
+                tone="outline"
+                size="md"
                 title={AI_CHAT_FORK_SESSION_LABEL}
-                aria-label={AI_CHAT_FORK_SESSION_LABEL}
+                label={AI_CHAT_FORK_SESSION_LABEL}
                 aria-busy={forkingSession()}
               >
                 <Show
@@ -4005,17 +3996,17 @@ export const AIChat: Component<AIChatProps> = (props) => {
                 >
                   <LoaderCircleIcon class="h-4 w-4 animate-spin" aria-hidden="true" />
                 </Show>
-              </button>
+              </ActionIconButton>
 
-              <button
-                type="button"
+              <ActionIconButton
                 onClick={() => {
                   void handleCompactSession();
                 }}
                 disabled={!canCompactCurrentSession()}
-                class="flex h-8 w-8 flex-shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content disabled:cursor-not-allowed disabled:opacity-50 disabled:hover:bg-surface disabled:hover:text-muted"
+                tone="outline"
+                size="md"
                 title={AI_CHAT_COMPACT_SESSION_LABEL}
-                aria-label={AI_CHAT_COMPACT_SESSION_LABEL}
+                label={AI_CHAT_COMPACT_SESSION_LABEL}
                 aria-busy={compactingSession()}
               >
                 <Show
@@ -4024,17 +4015,17 @@ export const AIChat: Component<AIChatProps> = (props) => {
                 >
                   <LoaderCircleIcon class="h-4 w-4 animate-spin" aria-hidden="true" />
                 </Show>
-              </button>
+              </ActionIconButton>
 
-              <button
-                type="button"
+              <ActionIconButton
                 onClick={() => {
                   void handleUndoLastTurn();
                 }}
                 disabled={!canUndoLastTurn()}
-                class="flex h-8 w-8 flex-shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content disabled:cursor-not-allowed disabled:opacity-50 disabled:hover:bg-surface disabled:hover:text-muted"
+                tone="outline"
+                size="md"
                 title={AI_CHAT_UNDO_LAST_TURN_LABEL}
-                aria-label={AI_CHAT_UNDO_LAST_TURN_LABEL}
+                label={AI_CHAT_UNDO_LAST_TURN_LABEL}
                 aria-busy={undoingLastTurn()}
               >
                 <Show
@@ -4043,17 +4034,17 @@ export const AIChat: Component<AIChatProps> = (props) => {
                 >
                   <LoaderCircleIcon class="h-4 w-4 animate-spin" aria-hidden="true" />
                 </Show>
-              </button>
+              </ActionIconButton>
 
-              <button
-                type="button"
+              <ActionIconButton
                 onClick={() => {
                   void handleRedoLastTurn();
                 }}
                 disabled={!canRedoLastTurn()}
-                class="flex h-8 w-8 flex-shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content disabled:cursor-not-allowed disabled:opacity-50 disabled:hover:bg-surface disabled:hover:text-muted"
+                tone="outline"
+                size="md"
                 title={AI_CHAT_REDO_LAST_TURN_LABEL}
-                aria-label={AI_CHAT_REDO_LAST_TURN_LABEL}
+                label={AI_CHAT_REDO_LAST_TURN_LABEL}
                 aria-busy={redoingLastTurn()}
               >
                 <Show
@@ -4062,61 +4053,61 @@ export const AIChat: Component<AIChatProps> = (props) => {
                 >
                   <LoaderCircleIcon class="h-4 w-4 animate-spin" aria-hidden="true" />
                 </Show>
-              </button>
+              </ActionIconButton>
 
-              <button
-                type="button"
+              <ActionIconButton
                 onClick={() => {
                   void copyLastAssistantAnswer();
                 }}
                 disabled={!hasLastAssistantAnswer()}
-                class="flex h-8 w-8 flex-shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content disabled:cursor-not-allowed disabled:opacity-50 disabled:hover:bg-surface disabled:hover:text-muted"
+                tone="outline"
+                size="md"
                 title={AI_CHAT_COPY_LAST_ANSWER_LABEL}
-                aria-label={AI_CHAT_COPY_LAST_ANSWER_LABEL}
+                label={AI_CHAT_COPY_LAST_ANSWER_LABEL}
               >
                 <ClipboardCopyIcon class="h-4 w-4" aria-hidden="true" />
-              </button>
+              </ActionIconButton>
 
-              <button
-                type="button"
+              <ActionIconButton
                 onClick={() => {
                   void copyAssistantTranscript();
                 }}
                 disabled={!hasCurrentTranscript()}
-                class="flex h-8 w-8 flex-shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content disabled:cursor-not-allowed disabled:opacity-50 disabled:hover:bg-surface disabled:hover:text-muted"
+                tone="outline"
+                size="md"
                 title={AI_CHAT_COPY_TRANSCRIPT_LABEL}
-                aria-label={AI_CHAT_COPY_TRANSCRIPT_LABEL}
+                label={AI_CHAT_COPY_TRANSCRIPT_LABEL}
               >
                 <CopyIcon class="h-4 w-4" aria-hidden="true" />
-              </button>
+              </ActionIconButton>
 
-              <button
-                type="button"
+              <ActionIconButton
                 onClick={exportAssistantTranscript}
                 disabled={!hasCurrentTranscript()}
-                class="flex h-8 w-8 flex-shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content disabled:cursor-not-allowed disabled:opacity-50 disabled:hover:bg-surface disabled:hover:text-muted"
+                tone="outline"
+                size="md"
                 title={AI_CHAT_EXPORT_TRANSCRIPT_LABEL}
-                aria-label={AI_CHAT_EXPORT_TRANSCRIPT_LABEL}
+                label={AI_CHAT_EXPORT_TRANSCRIPT_LABEL}
               >
                 <DownloadIcon class="h-4 w-4" aria-hidden="true" />
-              </button>
+              </ActionIconButton>
 
               {/* Session picker */}
               <div class="relative" data-dropdown>
-                <button
-                  type="button"
+                <ActionIconButton
                   ref={sessionButtonRef}
                   onClick={() => {
                     void handleToggleSessions();
                   }}
-                  class="flex-shrink-0 p-2 hover:text-base-content rounded-md hover:bg-surface-hover transition-colors"
+                  tone="muted"
+                  size="md"
                   title={AI_CHAT_SESSION_MENU_TITLE}
-                  aria-label={AI_CHAT_SESSION_MENU_TITLE}
+                  label={AI_CHAT_SESSION_MENU_TITLE}
                   aria-haspopup="dialog"
                   aria-expanded={showSessions()}
                 >
                   <ClockIcon class="h-4 w-4" aria-hidden="true" />
-                </button>
+                </ActionIconButton>
 
                 <Show when={showSessions()}>
                   <div
@@ -4286,11 +4277,12 @@ export const AIChat: Component<AIChatProps> = (props) => {
                                             aria-label={`New title for ${session.title || 'Untitled'}`}
                                             class="min-w-0 flex-1 rounded border border-blue-300 bg-surface px-2 py-1 text-sm font-medium text-base-content outline-none focus:border-blue-500 focus:ring-1 focus:ring-blue-500 disabled:opacity-70 dark:border-blue-800"
                                           />
-                                          <button
+                                          <ActionIconButton
                                             type="submit"
                                             disabled={sessionRenameSaving()}
-                                            class="inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950 disabled:cursor-wait disabled:opacity-70 dark:text-blue-200 dark:hover:bg-blue-900/60"
-                                            aria-label={AI_CHAT_RENAME_SESSION_SAVE_LABEL}
+                                            tone="accentGhost"
+                                            size="sm"
+                                            label={AI_CHAT_RENAME_SESSION_SAVE_LABEL}
                                             title={AI_CHAT_RENAME_SESSION_SAVE_LABEL}
                                           >
                                             <Show
@@ -4304,60 +4296,65 @@ export const AIChat: Component<AIChatProps> = (props) => {
                                                 aria-hidden="true"
                                               />
                                             </Show>
-                                          </button>
-                                          <button
-                                            type="button"
+                                          </ActionIconButton>
+                                          <ActionIconButton
                                             disabled={sessionRenameSaving()}
                                             onClick={cancelRenamingSession}
-                                            class="inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-md text-muted transition-colors hover:bg-surface-hover hover:text-base-content disabled:opacity-50"
-                                            aria-label={AI_CHAT_RENAME_SESSION_CANCEL_LABEL}
+                                            tone="muted"
+                                            size="sm"
+                                            label={AI_CHAT_RENAME_SESSION_CANCEL_LABEL}
                                             title={AI_CHAT_RENAME_SESSION_CANCEL_LABEL}
                                           >
                                             <XIcon class="h-3.5 w-3.5" aria-hidden="true" />
-                                          </button>
+                                          </ActionIconButton>
                                         </div>
                                       </form>
                                     </Show>
                                     <Show when={!isSessionRenaming(session.id)}>
                                       <div class="flex shrink-0 items-center gap-1">
-                                        <button
-                                          type="button"
-                                          class="rounded p-1 text-muted opacity-0 transition-opacity hover:bg-blue-100 hover:text-blue-600 focus:opacity-100 group-hover:opacity-100 group-focus-within:opacity-100 dark:hover:bg-blue-900 dark:hover:text-blue-300"
+                                        <ActionIconButton
+                                          tone="muted"
+                                          size="xs"
+                                          class="opacity-0 focus:opacity-100 group-hover:opacity-100 group-focus-within:opacity-100"
                                           onClick={(event) => startRenamingSession(session, event)}
-                                          aria-label={getSessionRenameLabel(session)}
+                                          label={getSessionRenameLabel(session)}
                                           title={getSessionRenameLabel(session)}
                                         >
                                           <PencilIcon class="h-3.5 w-3.5" aria-hidden="true" />
-                                        </button>
-                                        <button
-                                          type="button"
-                                          class={`rounded p-1 transition-opacity focus:opacity-100 hover:bg-blue-100 hover:text-blue-600 dark:hover:bg-blue-900 dark:hover:text-blue-300 ${
+                                        </ActionIconButton>
+                                        <ActionIconButton
+                                          tone={
+                                            isSessionPinned(session.id) ? 'accentGhost' : 'muted'
+                                          }
+                                          size="xs"
+                                          class={`transition-opacity focus:opacity-100 ${
                                             isSessionPinned(session.id)
-                                              ? 'opacity-100 text-blue-600 dark:text-blue-300'
-                                              : 'opacity-0 text-muted group-hover:opacity-100 group-focus-within:opacity-100'
+                                              ? 'opacity-100'
+                                              : 'opacity-0 group-hover:opacity-100 group-focus-within:opacity-100'
                                           }`}
                                           onClick={(event) =>
                                             togglePinnedSession(session.id, event)
                                           }
                                           aria-pressed={isSessionPinned(session.id)}
-                                          aria-label={getSessionPinLabel(session)}
+                                          label={getSessionPinLabel(session)}
                                           title={getSessionPinLabel(session)}
                                         >
                                           <BookmarkIcon
                                             class={`h-3.5 w-3.5 ${isSessionPinned(session.id) ? 'fill-current' : ''}`}
                                           />
-                                        </button>
-                                        <button
-                                          type="button"
-                                          class="rounded p-1 text-muted opacity-0 transition-opacity hover:bg-red-100 hover:text-red-500 focus:opacity-100 group-hover:opacity-100 group-focus-within:opacity-100 dark:hover:bg-red-900"
+                                        </ActionIconButton>
+                                        <ActionIconButton
+                                          tone="danger"
+                                          size="xs"
+                                          class="opacity-0 focus:opacity-100 group-hover:opacity-100 group-focus-within:opacity-100"
                                           onClick={(event) =>
                                             handleDeleteSession(session.id, event)
                                           }
-                                          aria-label={getSessionDeleteLabel(session)}
+                                          label={getSessionDeleteLabel(session)}
                                           title={getSessionDeleteLabel(session)}
                                         >
                                           <Trash2Icon class="h-3.5 w-3.5" />
-                                        </button>
+                                        </ActionIconButton>
                                       </div>
                                     </Show>
                                   </div>
@@ -4374,19 +4371,20 @@ export const AIChat: Component<AIChatProps> = (props) => {
             </div>
 
             {/* Close button (Always visible as fallback) */}
-            <button
-              type="button"
+            <ActionIconButton
               onClick={(e) => {
                 e.stopPropagation();
                 props.onClose();
               }}
-              class="order-2 flex h-9 w-9 flex-shrink-0 items-center justify-center rounded-md hover:text-base-content hover:bg-surface-hover transition-colors sm:order-none"
+              tone="neutral"
+              size="lg"
+              class="order-2 sm:order-none"
               title={AI_CHAT_CLOSE_LABEL}
-              aria-label={AI_CHAT_CLOSE_LABEL}
+              label={AI_CHAT_CLOSE_LABEL}
               data-testid="assistant-close-button"
             >
               <XIcon class="h-5 w-5" />
-            </button>
+            </ActionIconButton>
           </div>
 
           <Show when={transcriptCopyFallback()}>
@@ -4398,24 +4396,24 @@ export const AIChat: Component<AIChatProps> = (props) => {
                 <div class="mb-2 flex items-center justify-between gap-2">
                   <div class="text-xs font-semibold">{AI_CHAT_TRANSCRIPT_FALLBACK_TITLE}</div>
                   <div class="flex items-center gap-1.5">
-                    <button
-                      type="button"
+                    <ActionIconButton
                       onClick={downloadFallbackTranscript}
-                      class="flex h-7 w-7 items-center justify-center rounded-md border border-amber-200 bg-surface text-amber-700 transition-colors hover:bg-amber-100 hover:text-amber-900 dark:border-amber-800 dark:bg-amber-950/60 dark:text-amber-200 dark:hover:bg-amber-900"
+                      tone="warningOutline"
+                      size="sm"
                       title={AI_CHAT_TRANSCRIPT_FALLBACK_DOWNLOAD_LABEL}
-                      aria-label={AI_CHAT_TRANSCRIPT_FALLBACK_DOWNLOAD_LABEL}
+                      label={AI_CHAT_TRANSCRIPT_FALLBACK_DOWNLOAD_LABEL}
                     >
                       <DownloadIcon class="h-3.5 w-3.5" aria-hidden="true" />
-                    </button>
-                    <button
-                      type="button"
+                    </ActionIconButton>
+                    <ActionIconButton
                       onClick={() => setTranscriptCopyFallback(null)}
-                      class="flex h-7 w-7 items-center justify-center rounded-md text-amber-700 transition-colors hover:bg-amber-100 hover:text-amber-900 dark:text-amber-200 dark:hover:bg-amber-900"
+                      tone="warningGhost"
+                      size="sm"
                       title={AI_CHAT_TRANSCRIPT_FALLBACK_CLOSE_LABEL}
-                      aria-label={AI_CHAT_TRANSCRIPT_FALLBACK_CLOSE_LABEL}
+                      label={AI_CHAT_TRANSCRIPT_FALLBACK_CLOSE_LABEL}
                     >
                       <XIcon class="h-3.5 w-3.5" aria-hidden="true" />
-                    </button>
+                    </ActionIconButton>
                   </div>
                 </div>
                 <textarea
@@ -4551,22 +4549,15 @@ export const AIChat: Component<AIChatProps> = (props) => {
                   {AI_CHAT_DISCOVERY_HINT_BODY}
                 </span>
               </div>
-              <button
-                type="button"
+              <ActionIconButton
                 onClick={() => setDiscoveryHintDismissed(true)}
-                class="p-1 rounded hover:bg-cyan-100 dark:hover:bg-cyan-800 text-cyan-500 dark:text-cyan-400"
+                tone="infoGhost"
+                size="xs"
                 title={AI_CHAT_DISCOVERY_HINT_DISMISS_LABEL}
-                aria-label={AI_CHAT_DISCOVERY_HINT_DISMISS_LABEL}
+                label={AI_CHAT_DISCOVERY_HINT_DISMISS_LABEL}
               >
-                <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-                  <path
-                    stroke-linecap="round"
-                    stroke-linejoin="round"
-                    stroke-width="2"
-                    d="M6 18L18 6M6 6l12 12"
-                  />
-                </svg>
-              </button>
+                <XIcon class="h-3.5 w-3.5" aria-hidden="true" />
+              </ActionIconButton>
             </div>
           </Show>
 
@@ -4696,19 +4687,20 @@ export const AIChat: Component<AIChatProps> = (props) => {
                         </div>
                       )}
                     </Show>
-                    <button
-                      type="button"
+                    <ActionIconButton
                       onClick={stopActiveResponse}
-                      class={`inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-md border bg-surface text-base-content shadow-sm transition-colors hover:bg-surface-hover ${
+                      tone="outline"
+                      size="sm"
+                      class={
                         interruptArmed()
                           ? 'border-blue-400 ring-2 ring-blue-500/30'
                           : 'border-border'
-                      }`}
+                      }
                       title={interruptArmed() ? 'Stop response armed' : 'Stop'}
-                      aria-label={interruptArmed() ? 'Stop response armed' : 'Stop response'}
+                      label={interruptArmed() ? 'Stop response armed' : 'Stop response'}
                     >
                       <SquareIcon class="h-3.5 w-3.5" aria-hidden="true" />
-                    </button>
+                    </ActionIconButton>
                   </div>
                 </Show>
                 <Show when={autonomousWarningVisible()}>
@@ -4735,15 +4727,15 @@ export const AIChat: Component<AIChatProps> = (props) => {
                     >
                       Switch to Approval
                     </button>
-                    <button
-                      type="button"
+                    <ActionIconButton
                       onClick={() => setAutonomousBannerDismissed(true)}
-                      class="inline-flex h-6 w-6 shrink-0 items-center justify-center rounded-md text-red-500 transition-colors hover:bg-red-50 hover:text-red-700 dark:text-red-200 dark:hover:bg-red-950/40"
+                      tone="danger"
+                      size="xs"
                       title={AI_CHAT_AUTONOMOUS_WARNING_DISMISS_LABEL}
-                      aria-label={AI_CHAT_AUTONOMOUS_WARNING_DISMISS_LABEL}
+                      label={AI_CHAT_AUTONOMOUS_WARNING_DISMISS_LABEL}
                     >
                       <XIcon class="h-3.5 w-3.5" aria-hidden="true" />
-                    </button>
+                    </ActionIconButton>
                   </div>
                 </Show>
                 <Show when={activityDockQueuedFollowUpCount() > 0}>
@@ -4766,18 +4758,18 @@ export const AIChat: Component<AIChatProps> = (props) => {
                         )}{' '}
                         {chat.queuedFollowUpsPaused() ? 'paused' : 'queued'}
                       </span>
-                      <button
-                        type="button"
+                      <ActionIconButton
                         onClick={() => {
                           chat.clearQueuedFollowUps();
                           focusComposer();
                         }}
-                        class="inline-flex h-6 w-6 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-900 dark:text-blue-200 dark:hover:bg-blue-900/50"
+                        tone="accentGhost"
+                        size="xs"
                         title="Clear queued follow-ups"
-                        aria-label="Clear queued follow-up messages"
+                        label="Clear queued follow-up messages"
                       >
                         <XIcon class="h-3.5 w-3.5" aria-hidden="true" />
-                      </button>
+                      </ActionIconButton>
                     </div>
                     <div class="mt-1 max-h-24 space-y-1 overflow-y-auto" role="list">
                       <For each={chat.queuedFollowUps()}>
@@ -4824,48 +4816,48 @@ export const AIChat: Component<AIChatProps> = (props) => {
                                 </Show>
                               </span>
                               <Show when={chat.queuedFollowUpCount() > 1 && index() > 0}>
-                                <button
-                                  type="button"
+                                <ActionIconButton
                                   onClick={() => sendQueuedFollowUpNext(queued.id)}
-                                  class="inline-flex h-6 w-6 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950 dark:text-blue-200 dark:hover:bg-blue-900/60"
+                                  tone="accentGhost"
+                                  size="xs"
                                   title="Send queued follow-up next"
-                                  aria-label={`Send queued follow-up next: ${preview()}`}
+                                  label={`Send queued follow-up next: ${preview()}`}
                                 >
                                   <SendIcon class="h-3.5 w-3.5" aria-hidden="true" />
-                                </button>
+                                </ActionIconButton>
                               </Show>
                               <Show when={chat.queuedFollowUpsPaused() && index() === 0}>
-                                <button
-                                  type="button"
+                                <ActionIconButton
                                   onClick={() => sendQueuedFollowUpNext(queued.id)}
-                                  class="inline-flex h-6 w-6 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950 dark:text-blue-200 dark:hover:bg-blue-900/60"
+                                  tone="accentGhost"
+                                  size="xs"
                                   title="Resume queued follow-up"
-                                  aria-label={`Resume queued follow-up: ${preview()}`}
+                                  label={`Resume queued follow-up: ${preview()}`}
                                 >
                                   <SendIcon class="h-3.5 w-3.5" aria-hidden="true" />
-                                </button>
+                                </ActionIconButton>
                               </Show>
-                              <button
-                                type="button"
+                              <ActionIconButton
                                 onClick={() => editQueuedFollowUp(queued.id)}
-                                class="inline-flex h-6 w-6 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950 dark:text-blue-200 dark:hover:bg-blue-900/60"
+                                tone="accentGhost"
+                                size="xs"
                                 title="Edit queued follow-up"
-                                aria-label={`Edit queued follow-up: ${preview()}`}
+                                label={`Edit queued follow-up: ${preview()}`}
                               >
                                 <PencilIcon class="h-3.5 w-3.5" aria-hidden="true" />
-                              </button>
-                              <button
-                                type="button"
+                              </ActionIconButton>
+                              <ActionIconButton
                                 onClick={() => {
                                   chat.cancelQueuedFollowUp(queued.id);
                                   focusComposer();
                                 }}
-                                class="inline-flex h-6 w-6 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950 dark:text-blue-200 dark:hover:bg-blue-900/60"
+                                tone="accentGhost"
+                                size="xs"
                                 title="Remove queued follow-up"
-                                aria-label={`Remove queued follow-up: ${preview()}`}
+                                label={`Remove queued follow-up: ${preview()}`}
                               >
                                 <XIcon class="h-3.5 w-3.5" aria-hidden="true" />
-                              </button>
+                              </ActionIconButton>
                             </div>
                           );
                         }}
@@ -4918,15 +4910,16 @@ export const AIChat: Component<AIChatProps> = (props) => {
                   visible={slashCommandActive()}
                 />
                 <div class="absolute bottom-2 right-2 flex items-center gap-1.5">
-                  <button
+                  <ActionIconButton
                     type="submit"
                     disabled={!input().trim()}
-                    class="flex h-9 w-9 items-center justify-center rounded-md bg-blue-600 text-white shadow-sm transition-colors hover:bg-blue-700 disabled:cursor-not-allowed disabled:opacity-45"
+                    tone="primary"
+                    size="lg"
                     title={chat.isLoading() ? 'Queue follow-up' : 'Send'}
-                    aria-label={chat.isLoading() ? 'Queue follow-up' : 'Send message'}
+                    label={chat.isLoading() ? 'Queue follow-up' : 'Send message'}
                   >
                     <SendIcon class="h-4 w-4" />
-                  </button>
+                  </ActionIconButton>
                 </div>
               </div>
             </form>
@@ -4972,34 +4965,34 @@ export const AIChat: Component<AIChatProps> = (props) => {
                     </div>
                   )}
                 </Show>
-                <button
-                  type="button"
+                <ActionIconButton
                   onClick={openAssistantCommandHelp}
-                  class="flex h-7 w-7 shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content focus:outline-none focus:ring-2 focus:ring-blue-500/30"
+                  tone="outline"
+                  size="sm"
                   title={AI_CHAT_COMMAND_HELP_BUTTON_LABEL}
-                  aria-label={AI_CHAT_COMMAND_HELP_BUTTON_LABEL}
+                  label={AI_CHAT_COMMAND_HELP_BUTTON_LABEL}
                   data-testid="assistant-command-help-trigger"
                 >
                   <CircleHelpIcon class="h-3.5 w-3.5" aria-hidden="true" />
-                </button>
-                <button
-                  type="button"
+                </ActionIconButton>
+                <ActionIconButton
                   onClick={() => cycleRecentModelRoute()}
                   disabled={!nextRecentModelRoute()}
-                  class="flex h-7 w-7 shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:text-base-content disabled:cursor-not-allowed disabled:opacity-45"
+                  tone="outline"
+                  size="sm"
                   title={
                     nextRecentModelRouteLabel()
                       ? `${AI_CHAT_CYCLE_RECENT_MODEL_LABEL}: ${nextRecentModelRouteLabel()}`
                       : AI_CHAT_CYCLE_RECENT_MODEL_LABEL
                   }
-                  aria-label={
+                  label={
                     nextRecentModelRouteLabel()
                       ? `${AI_CHAT_CYCLE_RECENT_MODEL_LABEL}: ${nextRecentModelRouteLabel()}`
                       : AI_CHAT_CYCLE_RECENT_MODEL_LABEL
                   }
                 >
                   <RotateCwIcon class="h-3.5 w-3.5" aria-hidden="true" />
-                </button>
+                </ActionIconButton>
 
                 <div class="relative" data-dropdown>
                   <button
diff --git a/frontend-modern/src/components/shared/Button.test.tsx b/frontend-modern/src/components/shared/Button.test.tsx
index 4a1ddde75..982521255 100644
--- a/frontend-modern/src/components/shared/Button.test.tsx
+++ b/frontend-modern/src/components/shared/Button.test.tsx
@@ -231,9 +231,32 @@ describe('Button', () => {
     const onClick = vi.fn();
 
     render(() => (
-      <ActionIconButton label="Edit thresholds" tone="accent" size="xs" onClick={onClick}>
-        <span aria-hidden="true">E</span>
-      </ActionIconButton>
+      <>
+        <ActionIconButton label="Edit thresholds" tone="accent" size="xs" onClick={onClick}>
+          <span aria-hidden="true">E</span>
+        </ActionIconButton>
+        <ActionIconButton label="Open help" tone="outline" size="md">
+          <span aria-hidden="true">?</span>
+        </ActionIconButton>
+        <ActionIconButton label="Notifications enabled" tone="outlineSelected" size="md">
+          <span aria-hidden="true">N</span>
+        </ActionIconButton>
+        <ActionIconButton label="Send message" tone="primary" size="lg">
+          <span aria-hidden="true">S</span>
+        </ActionIconButton>
+        <ActionIconButton label="Promote queued follow-up" tone="accentGhost" size="xs">
+          <span aria-hidden="true">P</span>
+        </ActionIconButton>
+        <ActionIconButton label="Dismiss warning" tone="warningGhost" size="sm">
+          <span aria-hidden="true">W</span>
+        </ActionIconButton>
+        <ActionIconButton label="Download fallback" tone="warningOutline" size="sm">
+          <span aria-hidden="true">D</span>
+        </ActionIconButton>
+        <ActionIconButton label="Dismiss info" tone="infoGhost" size="xs">
+          <span aria-hidden="true">I</span>
+        </ActionIconButton>
+      </>
     ));
 
     const button = screen.getByRole('button', { name: 'Edit thresholds' });
@@ -243,6 +266,21 @@ describe('Button', () => {
     expect(button).toHaveClass('w-6');
     expect(button).toHaveClass('bg-blue-50');
 
+    expect(screen.getByRole('button', { name: 'Open help' })).toHaveClass('border-border');
+    expect(screen.getByRole('button', { name: 'Notifications enabled' })).toHaveClass(
+      'bg-surface-alt',
+    );
+    expect(screen.getByRole('button', { name: 'Send message' })).toHaveClass('h-9');
+    expect(screen.getByRole('button', { name: 'Send message' })).toHaveClass('bg-blue-600');
+    expect(screen.getByRole('button', { name: 'Promote queued follow-up' })).toHaveClass(
+      'text-blue-700',
+    );
+    expect(screen.getByRole('button', { name: 'Dismiss warning' })).toHaveClass('text-amber-700');
+    expect(screen.getByRole('button', { name: 'Download fallback' })).toHaveClass(
+      'border-amber-200',
+    );
+    expect(screen.getByRole('button', { name: 'Dismiss info' })).toHaveClass('text-cyan-500');
+
     button.click();
     expect(onClick).toHaveBeenCalledTimes(1);
   });
diff --git a/frontend-modern/src/components/shared/SharedPrimitives.guardrails.test.ts b/frontend-modern/src/components/shared/SharedPrimitives.guardrails.test.ts
index da65c2556..a8e3e15a1 100644
--- a/frontend-modern/src/components/shared/SharedPrimitives.guardrails.test.ts
+++ b/frontend-modern/src/components/shared/SharedPrimitives.guardrails.test.ts
@@ -2982,6 +2982,21 @@ describe('shared primitive guardrails', () => {
     const alertResourceActionGuard = registry.patternGuards?.find(
       (guard) => guard.id === 'alert-resource-action-local-svg-button-shell',
     );
+    const aiChatActionIconHeaderGuard = registry.patternGuards?.find(
+      (guard) => guard.id === 'ai-chat-action-icon-header-local-shell',
+    );
+    const aiChatActionIconAccentGuard = registry.patternGuards?.find(
+      (guard) => guard.id === 'ai-chat-action-icon-accent-local-shell',
+    );
+    const aiChatActionIconPrimarySendGuard = registry.patternGuards?.find(
+      (guard) => guard.id === 'ai-chat-action-icon-primary-send-local-shell',
+    );
+    const aiChatActionIconWarningGuard = registry.patternGuards?.find(
+      (guard) => guard.id === 'ai-chat-action-icon-warning-local-shell',
+    );
+    const aiChatActionIconFooterGuard = registry.patternGuards?.find(
+      (guard) => guard.id === 'ai-chat-action-icon-footer-local-shell',
+    );
     const commandCopyGuard = registry.patternGuards?.find(
       (guard) => guard.id === 'button-command-copy-local-shell',
     );
@@ -3817,6 +3832,7 @@ describe('shared primitive guardrails', () => {
       'src/components/Alerts/AlertResourceTableMobile.tsx',
       'src/components/Alerts/AlertResourceTableRow.tsx',
       'src/components/Alerts/ResourceTable.tsx',
+      'src/components/AI/Chat/index.tsx',
       'src/components/Settings/RolesPanel.tsx',
       'src/components/Settings/SSOProvidersPanel.tsx',
     ]);
@@ -3855,6 +3871,21 @@ describe('shared primitive guardrails', () => {
             'text-slate-400 hover:text-white bg-surface hover:bg-slate-700 rounded-full p-1.5',
           ]),
         }),
+        expect.objectContaining({
+          path: 'src/components/AI/Chat/index.tsx',
+          patterns: expect.arrayContaining([
+            'flex h-8 w-8 flex-shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content disabled:cursor-not-allowed disabled:opacity-50 disabled:hover:bg-surface disabled:hover:text-muted',
+            'flex-shrink-0 p-2 hover:text-base-content rounded-md hover:bg-surface-hover transition-colors',
+            'inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950 disabled:cursor-wait disabled:opacity-70 dark:text-blue-200 dark:hover:bg-blue-900/60',
+            'rounded p-1 text-muted opacity-0 transition-opacity hover:bg-blue-100 hover:text-blue-600 focus:opacity-100 group-hover:opacity-100 group-focus-within:opacity-100 dark:hover:bg-blue-900 dark:hover:text-blue-300',
+            'order-2 flex h-9 w-9 flex-shrink-0 items-center justify-center rounded-md hover:text-base-content hover:bg-surface-hover transition-colors sm:order-none',
+            'flex h-7 w-7 items-center justify-center rounded-md border border-amber-200 bg-surface text-amber-700 transition-colors hover:bg-amber-100 hover:text-amber-900 dark:border-amber-800 dark:bg-amber-950/60 dark:text-amber-200 dark:hover:bg-amber-900',
+            'flex h-7 w-7 items-center justify-center rounded-md text-amber-700 transition-colors hover:bg-amber-100 hover:text-amber-900 dark:text-amber-200 dark:hover:bg-amber-900',
+            'inline-flex h-6 w-6 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950 dark:text-blue-200 dark:hover:bg-blue-900/60',
+            'flex h-9 w-9 items-center justify-center rounded-md bg-blue-600 text-white shadow-sm transition-colors hover:bg-blue-700 disabled:cursor-not-allowed disabled:opacity-45',
+            'flex h-7 w-7 shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content focus:outline-none focus:ring-2 focus:ring-blue-500/30',
+          ]),
+        }),
         expect.objectContaining({
           path: 'src/components/Settings/SSOProvidersPanel.tsx',
           patterns: expect.arrayContaining([
@@ -3882,6 +3913,37 @@ describe('shared primitive guardrails', () => {
       'src/components/shared/Button.test.tsx',
       'src/components/shared/SharedPrimitives.guardrails.test.ts',
     ]);
+    for (const guard of [
+      aiChatActionIconHeaderGuard,
+      aiChatActionIconAccentGuard,
+      aiChatActionIconPrimarySendGuard,
+      aiChatActionIconWarningGuard,
+      aiChatActionIconFooterGuard,
+    ]) {
+      expect(guard?.canonical?.path).toBe('src/components/shared/Button.tsx');
+      expect(guard?.canonical?.export).toBe('ActionIconButton');
+      expect(guard?.scopes).toEqual(['src/components/AI/Chat']);
+      expect(guard?.allowedPaths ?? []).toHaveLength(0);
+      expect(guard?.ignoredPaths).toEqual([
+        'src/components/AI/Chat/__tests__/AIChat.test.tsx',
+        'src/components/shared/Button.test.tsx',
+      ]);
+    }
+    expect(aiChatActionIconHeaderGuard?.allPatterns).toEqual([
+      'flex h-8 w-8 flex-shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content',
+    ]);
+    expect(aiChatActionIconAccentGuard?.allPatterns).toEqual([
+      'inline-flex h-6 w-6 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950',
+    ]);
+    expect(aiChatActionIconPrimarySendGuard?.allPatterns).toEqual([
+      'flex h-9 w-9 items-center justify-center rounded-md bg-blue-600 text-white shadow-sm transition-colors hover:bg-blue-700',
+    ]);
+    expect(aiChatActionIconWarningGuard?.allPatterns).toEqual([
+      'flex h-7 w-7 items-center justify-center rounded-md border border-amber-200 bg-surface text-amber-700 transition-colors hover:bg-amber-100',
+    ]);
+    expect(aiChatActionIconFooterGuard?.allPatterns).toEqual([
+      'flex h-7 w-7 shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content',
+    ]);
     expect(copyValueRule?.canonical?.path).toBe('src/components/shared/Button.tsx');
     expect(copyValueRule?.canonical?.export).toBe('CopyValueButton');
     expect(copyValueRule?.requiredConsumers?.map((consumer) => consumer.path)).toEqual([
@@ -3962,6 +4024,14 @@ describe('shared primitive guardrails', () => {
     expect(buttonModelSource).toContain('COPY_VALUE_BUTTON_SIZE_CLASSES');
     expect(buttonModelSource).toContain('ACTION_ICON_BUTTON_TONE_CLASSES');
     expect(buttonModelSource).toContain('ACTION_ICON_BUTTON_SIZE_CLASSES');
+    expect(buttonModelSource).toContain('outline:');
+    expect(buttonModelSource).toContain('outlineSelected:');
+    expect(buttonModelSource).toContain('primary:');
+    expect(buttonModelSource).toContain('accentGhost:');
+    expect(buttonModelSource).toContain('warningGhost:');
+    expect(buttonModelSource).toContain('warningOutline:');
+    expect(buttonModelSource).toContain('infoGhost:');
+    expect(buttonModelSource).toContain(['lg', ": 'h-9 w-9'"].join(''));
     expect(buttonModelSource).toContain('dangerOutline:');
     expect(buttonModelSource).toContain('settingsAction:');
     expect(buttonModelSource).toContain('getCopyValueButtonClass');
@@ -3993,6 +4063,22 @@ describe('shared primitive guardrails', () => {
     expect(chatMessagesSource).not.toContain(
       'rounded-md border border-border bg-surface px-3 py-1.5 text-xs font-medium text-base-content',
     );
+    expect(aiChatSource).toContain('@/components/shared/Button');
+    expect(aiChatSource).toContain('ActionIconButton');
+    for (const retiredActionIconShell of [
+      'flex h-8 w-8 flex-shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content disabled:cursor-not-allowed disabled:opacity-50 disabled:hover:bg-surface disabled:hover:text-muted',
+      'flex-shrink-0 p-2 hover:text-base-content rounded-md hover:bg-surface-hover transition-colors',
+      'inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950 disabled:cursor-wait disabled:opacity-70 dark:text-blue-200 dark:hover:bg-blue-900/60',
+      'rounded p-1 text-muted opacity-0 transition-opacity hover:bg-blue-100 hover:text-blue-600 focus:opacity-100 group-hover:opacity-100 group-focus-within:opacity-100 dark:hover:bg-blue-900 dark:hover:text-blue-300',
+      'order-2 flex h-9 w-9 flex-shrink-0 items-center justify-center rounded-md hover:text-base-content hover:bg-surface-hover transition-colors sm:order-none',
+      'flex h-7 w-7 items-center justify-center rounded-md border border-amber-200 bg-surface text-amber-700 transition-colors hover:bg-amber-100 hover:text-amber-900 dark:border-amber-800 dark:bg-amber-950/60 dark:text-amber-200 dark:hover:bg-amber-900',
+      'flex h-7 w-7 items-center justify-center rounded-md text-amber-700 transition-colors hover:bg-amber-100 hover:text-amber-900 dark:text-amber-200 dark:hover:bg-amber-900',
+      'inline-flex h-6 w-6 shrink-0 items-center justify-center rounded-md text-blue-700 transition-colors hover:bg-blue-100 hover:text-blue-950 dark:text-blue-200 dark:hover:bg-blue-900/60',
+      'flex h-9 w-9 items-center justify-center rounded-md bg-blue-600 text-white shadow-sm transition-colors hover:bg-blue-700 disabled:cursor-not-allowed disabled:opacity-45',
+      'flex h-7 w-7 shrink-0 items-center justify-center rounded-md border border-border bg-surface text-muted transition-colors hover:border-border hover:bg-surface-hover hover:text-base-content focus:outline-none focus:ring-2 focus:ring-blue-500/30',
+    ]) {
+      expect(aiChatSource).not.toContain(retiredActionIconShell);
+    }
     expect(resourceDetailDrawerDebugTabSource).toContain('@/components/shared/Button');
     expect(resourceDetailDrawerDebugTabSource).not.toContain(
       'rounded-md border border-border bg-surface px-3 py-1.5 text-xs font-medium text-base-content',
diff --git a/frontend-modern/src/components/shared/buttonModel.ts b/frontend-modern/src/components/shared/buttonModel.ts
index cd438ea30..0d750ccba 100644
--- a/frontend-modern/src/components/shared/buttonModel.ts
+++ b/frontend-modern/src/components/shared/buttonModel.ts
@@ -80,8 +80,20 @@ export const getButtonClass = (options: ButtonClassOptions = {}): string =>
 
 export type CopyValueButtonVariant = 'neutral' | 'ghost' | 'accent' | 'chip';
 export type CopyValueButtonSize = 'xs' | 'sm' | 'md' | 'lg' | 'chip';
-export type ActionIconButtonTone = 'neutral' | 'muted' | 'accent' | 'success' | 'danger';
-export type ActionIconButtonSize = 'xs' | 'sm' | 'md';
+export type ActionIconButtonTone =
+  | 'neutral'
+  | 'muted'
+  | 'outline'
+  | 'outlineSelected'
+  | 'primary'
+  | 'accent'
+  | 'accentGhost'
+  | 'success'
+  | 'warningGhost'
+  | 'warningOutline'
+  | 'infoGhost'
+  | 'danger';
+export type ActionIconButtonSize = 'xs' | 'sm' | 'md' | 'lg';
 
 export const COPY_VALUE_BUTTON_BASE_CLASS =
   'inline-flex shrink-0 items-center justify-center rounded transition-colors focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50';
@@ -124,10 +136,22 @@ export const ACTION_ICON_BUTTON_BASE_CLASS =
 export const ACTION_ICON_BUTTON_TONE_CLASSES: Record<ActionIconButtonTone, string> = {
   neutral: 'text-base-content hover:bg-surface-hover hover:text-base-content',
   muted: 'text-muted hover:bg-surface-hover hover:text-base-content',
+  outline:
+    'border border-border bg-surface text-muted shadow-sm hover:border-border hover:bg-surface-hover hover:text-base-content',
+  outlineSelected:
+    'border border-border bg-surface-alt text-base-content shadow-sm hover:border-border hover:bg-surface-hover hover:text-base-content',
+  primary: 'border border-transparent bg-blue-600 text-white shadow-sm hover:bg-blue-700',
   accent:
     'bg-blue-50 text-blue-600 hover:bg-blue-100 hover:text-blue-700 dark:bg-blue-900 dark:text-blue-400 dark:hover:bg-blue-950 dark:hover:text-blue-300',
+  accentGhost:
+    'text-blue-700 hover:bg-blue-100 hover:text-blue-950 dark:text-blue-200 dark:hover:bg-blue-900/60',
   success:
     'bg-green-50 text-green-600 hover:bg-green-100 hover:text-green-700 dark:bg-green-900 dark:text-green-400 dark:hover:bg-green-950 dark:hover:text-green-300',
+  warningGhost:
+    'text-amber-700 hover:bg-amber-100 hover:text-amber-900 dark:text-amber-200 dark:hover:bg-amber-900',
+  warningOutline:
+    'border border-amber-200 bg-surface text-amber-700 hover:bg-amber-100 hover:text-amber-900 dark:border-amber-800 dark:bg-amber-950/60 dark:text-amber-200 dark:hover:bg-amber-900',
+  infoGhost: 'text-cyan-500 hover:bg-cyan-100 dark:text-cyan-400 dark:hover:bg-cyan-800',
   danger:
     'text-red-600 hover:bg-red-50 hover:text-red-700 dark:text-red-400 dark:hover:bg-red-950 dark:hover:text-red-300',
 };
@@ -136,6 +160,7 @@ export const ACTION_ICON_BUTTON_SIZE_CLASSES: Record<ActionIconButtonSize, strin
   xs: 'h-6 w-6',
   sm: 'h-7 w-7',
   md: 'h-8 w-8',
+  lg: 'h-9 w-9',
 };
 
 export type ActionIconButtonClassOptions = {