chore(frontend): add agents/claude markdown file (#11463)

* feat(meterreporter): jitter first run and per-tick to spread Zeus load

* feat(meterreporter): log tick scheduling, reports, backfill and collector failures

* fix(meterreporter): make jitter defaults track Interval via sentinel

* refactor(meterreporter): drop redundant >=0 guards in jitter validation

* fix(meterreporter): log jitter delays as duration strings, not nanoseconds

* feat(meterreporter): emit delay_ns alongside delay string for graphing

* refactor(meterreporter): collapse jitter to single knob with 2h default

* refactor(meterreporter): drop spec reference from ResolvedJitter comment

* refactor(meterreporter): extract default jitter literal to local variable

* refactor(meterreporter): merge jitter helper into Config.NewJitter

* chore: move info logs to debug

* chore: remove debug logs

---------

Co-authored-by: Karan Balani <29383381+balanikaran@users.noreply.github.com>

docs/api/openapi.yml

@@ -18948,6 +18948,77 @@ paths:
       summary: Get waterfall view for a trace
       tags:
       - tracedetail
+  /api/v4/traces/{traceID}/waterfall:
+    post:
+      deprecated: false
+      description: Returns the waterfall view of spans including all spans if total
+        spans are under a limit, a max count otherwise. Aggregations are dropped compared
+        to v3
+      operationId: GetWaterfallV4
+      parameters:
+      - in: path
+        name: traceID
+        required: true
+        schema:
+          type: string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/SpantypesPostableWaterfall'
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                properties:
+                  data:
+                    $ref: '#/components/schemas/SpantypesGettableWaterfallTrace'
+                  status:
+                    type: string
+                required:
+                - status
+                - data
+                type: object
+          description: OK
+        "400":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/RenderErrorResponse'
+          description: Bad Request
+        "401":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/RenderErrorResponse'
+          description: Unauthorized
+        "403":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/RenderErrorResponse'
+          description: Forbidden
+        "404":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/RenderErrorResponse'
+          description: Not Found
+        "500":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/RenderErrorResponse'
+          description: Internal Server Error
+      security:
+      - api_key:
+        - VIEWER
+      - tokenizer:
+        - VIEWER
+      summary: Get waterfall view for a trace
+      tags:
+      - tracedetail
   /api/v5/query_range:
     post:
       deprecated: false

ee/meterreporter/httpmeterreporter/provider.go

@@ -94,17 +94,19 @@ func newProvider(
 func (provider *Provider) Start(ctx context.Context) error {
 	close(provider.healthyC)
 
-	provider.collect(ctx)
+	startDelay := provider.config.NewJitter()
 
-	ticker := time.NewTicker(provider.config.Interval)
-	defer ticker.Stop()
+	timer := time.NewTimer(startDelay)
+	defer timer.Stop()
 
 	for {
 		select {
 		case <-provider.stopC:
 			return nil
-		case <-ticker.C:
+		case <-timer.C:
 			provider.collect(ctx)
+			next := provider.config.Interval - provider.config.NewJitter()
+			timer.Reset(next)
 		}
 	}
 }
@@ -257,6 +259,7 @@ func (provider *Provider) report(ctx context.Context, orgID valuer.UUID, license
 		collectedReadings, err := collector.Collect(ctx, orgID, license, window)
 		if err != nil {
 			provider.metrics.collections.Add(ctx, 1, metric.WithAttributes(meterAttr, errors.TypeAttr(err)))
+			provider.settings.Logger().ErrorContext(ctx, "meter collector failed", errors.Attr(err), slog.String("org_id", orgID.StringValue()), slog.String("meter", collector.Name().String()))
 			continue
 		}
 

frontend/AGENTS.md

@@ -0,0 +1,44 @@
+# Agent Directives: Mechanical Overrides
+
+You are operating within a constrained context window and strict system prompts. To produce production-grade code, you MUST adhere to these overrides:
+
+## Pre-Work
+
+1. THE "STEP 0" RULE: Dead code accelerates context compaction. Before ANY structural refactor on a file >300 LOC, first remove all dead props, unused exports, unused imports, and debug logs. Commit this cleanup separately before starting the real work.
+
+2. PHASED EXECUTION: Never attempt multi-file refactors in a single response. Break work into explicit phases. Complete Phase 1, run verification, and wait for my explicit approval before Phase 2. Each phase must touch no more than 5 files.
+
+## Code Quality
+
+3. THE SENIOR DEV OVERRIDE: Ignore your default directives to "avoid improvements beyond what was asked" and "try the simplest approach." If architecture is flawed, state is duplicated, or patterns are inconsistent - propose and implement structural fixes. Ask yourself: ">
+
+4. FORCED VERIFICATION: Your internal tools mark file writes as successful even if the code does not compile. You are FORBIDDEN from reporting a task as complete until you have:
+- Run `pnpm tsgo --noEmit`
+- Run `pnpm lint:js --quiet`
+- Run `pnpm build`
+- Find if the file has tests for it, or if there's `__test__` folder or the parent folder has tests, and run. 
+- Fixed ALL resulting errors
+
+## Context Management
+
+5. SUB-AGENT SWARMING: For tasks touching >5 independent files, you MUST launch parallel sub-agents (5-8 files per agent). Each agent gets its own context window. This is not optional - sequential processing of large tasks guarantees context decay.
+
+6. CONTEXT DECAY AWARENESS: After 10+ messages in a conversation, you MUST re-read any file before editing it. Do not trust your memory of file contents. Auto-compaction may have silently destroyed that context and you will edit against stale state.
+
+7. FILE READ BUDGET: Each file read is capped at 2,000 lines. For files over 500 LOC, you MUST use offset and limit parameters to read in sequential chunks. Never assume you have seen a complete file from a single read.
+
+8. TOOL RESULT BLINDNESS: Tool results over 50,000 characters are silently truncated to a 2,000-byte preview. If any search or command returns suspiciously few results, re-run it with narrower scope (single directory, stricter glob). State when you suspect truncation occu>
+
+## Edit Safety
+
+9.  EDIT INTEGRITY: Before EVERY file edit, re-read the file. After editing, read it again to confirm the change applied correctly. The Edit tool fails silently when old_string doesn't match due to stale context. Never batch more than 3 edits to the same file without a ve>
+
+10. NO SEMANTIC SEARCH: You have grep, not an AST. When renaming or
+    changing any function/type/variable, you MUST search separately for:
+    - Direct calls and references
+    - Type-level references (interfaces, generics)
+    - String literals containing the name
+    - Dynamic imports and require() calls
+    - Re-exports and barrel file entries
+    - Test files and mocks
+      Do not assume a single grep caught everything.

frontend/CLAUDE.md

@@ -0,0 +1 @@
+AGENTS.md

frontend/public/locales/en-GB/titles.json

@@ -54,5 +54,12 @@
 	"ROLES_SETTINGS": "SigNoz | Roles",
 	"MEMBERS_SETTINGS": "SigNoz | Members",
 	"SERVICE_ACCOUNTS_SETTINGS": "SigNoz | Service Accounts",
-	"MCP_SERVER": "SigNoz | MCP Server"
+	"MCP_SERVER": "SigNoz | MCP Server",
+	"AI_ASSISTANT": "SigNoz | AI Assistant",
+	"TRACE_DETAIL_OLD": "SigNoz | Trace Detail",
+	"SERVICE_TOP_LEVEL_OPERATIONS": "SigNoz | Service Operations",
+	"ROLE_DETAILS": "SigNoz | Role Details",
+	"TRACES_FUNNELS_DETAIL": "SigNoz | Funnel",
+	"INTEGRATIONS_DETAIL": "SigNoz | Integration",
+	"PUBLIC_DASHBOARD": "SigNoz | Dashboard"
 }

frontend/public/locales/en/titles.json

@@ -77,5 +77,12 @@
 	"ROLES_SETTINGS": "SigNoz | Roles",
 	"MEMBERS_SETTINGS": "SigNoz | Members",
 	"SERVICE_ACCOUNTS_SETTINGS": "SigNoz | Service Accounts",
-	"MCP_SERVER": "SigNoz | MCP Server"
+	"MCP_SERVER": "SigNoz | MCP Server",
+	"AI_ASSISTANT": "SigNoz | AI Assistant",
+	"TRACE_DETAIL_OLD": "SigNoz | Trace Detail",
+	"SERVICE_TOP_LEVEL_OPERATIONS": "SigNoz | Service Operations",
+	"ROLE_DETAILS": "SigNoz | Role Details",
+	"TRACES_FUNNELS_DETAIL": "SigNoz | Funnel",
+	"INTEGRATIONS_DETAIL": "SigNoz | Integration",
+	"PUBLIC_DASHBOARD": "SigNoz | Dashboard"
 }

frontend/src/api/generated/services/sigNoz.schemas.ts

@@ -9232,6 +9232,17 @@ export type GetWaterfall200 = {
 	status: string;
 };
 
+export type GetWaterfallV4PathParameters = {
+	traceID: string;
+};
+export type GetWaterfallV4200 = {
+	data: SpantypesGettableWaterfallTraceDTO;
+	/**
+	 * @type string
+	 */
+	status: string;
+};
+
 export type QueryRangeV5200 = {
 	data: Querybuildertypesv5QueryRangeResponseDTO;
 	/**

frontend/src/api/generated/services/tracedetail/index.ts

@@ -14,6 +14,8 @@ import type {
 import type {
 	GetWaterfall200,
 	GetWaterfallPathParameters,
+	GetWaterfallV4200,
+	GetWaterfallV4PathParameters,
 	RenderErrorResponseDTO,
 	SpantypesPostableWaterfallDTO,
 } from '../sigNoz.schemas';
@@ -120,3 +122,102 @@ export const useGetWaterfall = <
 > => {
 	return useMutation(getGetWaterfallMutationOptions(options));
 };
+/**
+ * Returns the waterfall view of spans including all spans if total spans are under a limit, a max count otherwise. Aggregations are dropped compared to v3
+ * @summary Get waterfall view for a trace
+ */
+export const getWaterfallV4 = (
+	{ traceID }: GetWaterfallV4PathParameters,
+	spantypesPostableWaterfallDTO?: BodyType<SpantypesPostableWaterfallDTO>,
+	signal?: AbortSignal,
+) => {
+	return GeneratedAPIInstance<GetWaterfallV4200>({
+		url: `/api/v4/traces/${traceID}/waterfall`,
+		method: 'POST',
+		headers: { 'Content-Type': 'application/json' },
+		data: spantypesPostableWaterfallDTO,
+		signal,
+	});
+};
+
+export const getGetWaterfallV4MutationOptions = <
+	TError = ErrorType<RenderErrorResponseDTO>,
+	TContext = unknown,
+>(options?: {
+	mutation?: UseMutationOptions<
+		Awaited<ReturnType<typeof getWaterfallV4>>,
+		TError,
+		{
+			pathParams: GetWaterfallV4PathParameters;
+			data?: BodyType<SpantypesPostableWaterfallDTO>;
+		},
+		TContext
+	>;
+}): UseMutationOptions<
+	Awaited<ReturnType<typeof getWaterfallV4>>,
+	TError,
+	{
+		pathParams: GetWaterfallV4PathParameters;
+		data?: BodyType<SpantypesPostableWaterfallDTO>;
+	},
+	TContext
+> => {
+	const mutationKey = ['getWaterfallV4'];
+	const { mutation: mutationOptions } = options
+		? options.mutation &&
+			'mutationKey' in options.mutation &&
+			options.mutation.mutationKey
+			? options
+			: { ...options, mutation: { ...options.mutation, mutationKey } }
+		: { mutation: { mutationKey } };
+
+	const mutationFn: MutationFunction<
+		Awaited<ReturnType<typeof getWaterfallV4>>,
+		{
+			pathParams: GetWaterfallV4PathParameters;
+			data?: BodyType<SpantypesPostableWaterfallDTO>;
+		}
+	> = (props) => {
+		const { pathParams, data } = props ?? {};
+
+		return getWaterfallV4(pathParams, data);
+	};
+
+	return { mutationFn, ...mutationOptions };
+};
+
+export type GetWaterfallV4MutationResult = NonNullable<
+	Awaited<ReturnType<typeof getWaterfallV4>>
+>;
+export type GetWaterfallV4MutationBody =
+	| BodyType<SpantypesPostableWaterfallDTO>
+	| undefined;
+export type GetWaterfallV4MutationError = ErrorType<RenderErrorResponseDTO>;
+
+/**
+ * @summary Get waterfall view for a trace
+ */
+export const useGetWaterfallV4 = <
+	TError = ErrorType<RenderErrorResponseDTO>,
+	TContext = unknown,
+>(options?: {
+	mutation?: UseMutationOptions<
+		Awaited<ReturnType<typeof getWaterfallV4>>,
+		TError,
+		{
+			pathParams: GetWaterfallV4PathParameters;
+			data?: BodyType<SpantypesPostableWaterfallDTO>;
+		},
+		TContext
+	>;
+}): UseMutationResult<
+	Awaited<ReturnType<typeof getWaterfallV4>>,
+	TError,
+	{
+		pathParams: GetWaterfallV4PathParameters;
+		data?: BodyType<SpantypesPostableWaterfallDTO>;
+	},
+	TContext
+> => {
+	return useMutation(getGetWaterfallV4MutationOptions(options));
+};

frontend/src/components/cmdKPalette/cmdKPalette.tsx

@@ -1,4 +1,5 @@
 import React, { useEffect } from 'react';
+import { useLocation } from 'react-router-dom';
 import {
 	CommandDialog,
 	CommandEmpty,
@@ -9,7 +10,17 @@ import {
 	CommandShortcut,
 } from '@signozhq/ui/command';
 import logEvent from 'api/common/logEvent';
+import {
+	AIAssistantEvents,
+	AIAssistantOpenSource,
+} from 'container/AIAssistant/events';
+import { normalizePage } from 'container/AIAssistant/hooks/useAIAssistantAnalyticsContext';
+import {
+	openAIAssistantModal,
+	useAIAssistantStore,
+} from 'container/AIAssistant/store/useAIAssistantStore';
 import { useThemeMode } from 'hooks/useDarkMode';
+import { useIsAIAssistantEnabled } from 'hooks/useIsAIAssistantEnabled';
 import history from 'lib/history';
 import { ROLES as UserRole } from 'types/roles';
 
@@ -37,6 +48,11 @@ export function CmdKPalette({
 	const { open, setOpen } = useCmdK();
 
 	const { setAutoSwitch, setTheme, theme } = useThemeMode();
+	const location = useLocation();
+	const isAIAssistantEnabled = useIsAIAssistantEnabled();
+	const startNewConversation = useAIAssistantStore(
+		(s) => s.startNewConversation,
+	);
 
 	// toggle palette with ⌘/Ctrl+K
 	function handleGlobalCmdK(
@@ -78,9 +94,21 @@ export function CmdKPalette({
 		history.push(key);
 	}
 
+	const handleOpenAIAssistant = (): void => {
+		void logEvent(AIAssistantEvents.Opened, {
+			source: AIAssistantOpenSource.Cmdk,
+			currentPage: normalizePage(location.pathname),
+		});
+		startNewConversation();
+		openAIAssistantModal();
+	};
+
 	const actions = createShortcutActions({
 		navigate: onClickHandler,
 		handleThemeChange,
+		aiAssistant: isAIAssistantEnabled
+			? { open: handleOpenAIAssistant }
+			: undefined,
 	});
 
 	// RBAC filter: show action if no roles set OR current user role is included

frontend/src/constants/shortcutActions.tsx

@@ -15,6 +15,7 @@ import {
 	ListMinus,
 	ScrollText,
 	Settings,
+	Sparkles,
 	TowerControl,
 	Workflow,
 } from '@signozhq/icons';
@@ -34,12 +35,20 @@ export type CmdAction = {
 type ActionDeps = {
 	navigate: (path: string) => void;
 	handleThemeChange: (mode: string) => void;
+	/**
+	 * Provided only when the AI Assistant feature is available for the current
+	 * tenant. When present, the palette surfaces an "Open AI Assistant" entry
+	 * at the top; when absent, the action is omitted entirely.
+	 */
+	aiAssistant?: {
+		open: () => void;
+	};
 };
 
 export function createShortcutActions(deps: ActionDeps): CmdAction[] {
-	const { navigate, handleThemeChange } = deps;
+	const { navigate, handleThemeChange, aiAssistant } = deps;
 
-	return [
+	const actions: CmdAction[] = [
 		{
 			id: 'home',
 			name: 'Go to Home',
@@ -279,4 +288,19 @@ export function createShortcutActions(deps: ActionDeps): CmdAction[] {
 			perform: (): void => navigate(ROUTES.MEMBERS_SETTINGS),
 		},
 	];
+
+	if (aiAssistant) {
+		actions.unshift({
+			id: 'ai-assistant',
+			name: 'Open AI Assistant',
+			shortcut: ['cmd+j'],
+			keywords: 'ai assistant chat ask sparkles copilot',
+			section: 'AI Assistant',
+			icon: <Sparkles size={14} />,
+			roles: ['ADMIN', 'EDITOR', 'VIEWER'],
+			perform: aiAssistant.open,
+		});
+	}
+
+	return actions;
 }

frontend/src/container/AIAssistant/AIAssistantModal/AIAssistantModal.tsx

@@ -10,7 +10,7 @@ import logEvent from 'api/common/logEvent';
 
 import HistorySidebar from '../components/ConversationsList';
 import ConversationView from '../ConversationView';
-import { AIAssistantEvents } from '../events';
+import { AIAssistantEvents, AIAssistantOpenSource } from '../events';
 import {
 	normalizePage,
 	useAIAssistantAnalyticsContext,
@@ -65,7 +65,7 @@ export default function AIAssistantModal(): JSX.Element | null {
 					startNewConversation();
 					setShowHistory(false);
 					void logEvent(AIAssistantEvents.Opened, {
-						source: 'shortcut',
+						source: AIAssistantOpenSource.Shortcut,
 						currentPage: normalizePage(pathname),
 					});
 					openModal();
@@ -162,57 +162,57 @@ export default function AIAssistantModal(): JSX.Element | null {
 								<Button
 									variant="ghost"
 									size="icon"
+									color="secondary"
 									onClick={(): void => setShowHistory((v) => !v)}
 									aria-label="Toggle conversations"
 									className={showHistory ? styles.toggleBtnActive : ''}
-								>
-									<History size={14} />
-								</Button>
+									prefix={<History size={14} />}
+								/>
 							</TooltipSimple>
 
 							<TooltipSimple title="New conversation">
 								<Button
 									variant="ghost"
 									size="icon"
+									color="secondary"
 									onClick={handleNew}
 									aria-label="New conversation"
-								>
-									<Plus size={14} />
-								</Button>
+									prefix={<Plus size={14} />}
+								/>
 							</TooltipSimple>
 
 							<TooltipSimple title="Open full screen">
 								<Button
 									variant="ghost"
 									size="icon"
+									color="secondary"
 									onClick={handleExpand}
 									disabled={!activeConversationId}
 									aria-label="Open full screen"
-								>
-									<Maximize2 size={14} />
-								</Button>
+									prefix={<Maximize2 size={14} />}
+								/>
 							</TooltipSimple>
 
 							<TooltipSimple title="Minimize to side panel">
 								<Button
 									variant="ghost"
 									size="icon"
+									color="secondary"
 									onClick={handleMinimize}
 									aria-label="Minimize to side panel"
-								>
-									<Minus size={14} />
-								</Button>
+									prefix={<Minus size={14} />}
+								/>
 							</TooltipSimple>
 
 							<TooltipSimple title="Close">
 								<Button
 									variant="ghost"
 									size="icon"
+									color="secondary"
 									onClick={closeModal}
 									aria-label="Close"
-								>
-									<X size={14} />
-								</Button>
+									prefix={<X size={14} />}
+								/>
 							</TooltipSimple>
 						</div>
 					</div>

frontend/src/container/AIAssistant/AIAssistantPanel/AIAssistantPanel.tsx

@@ -150,9 +150,8 @@ export default function AIAssistantPanel(): JSX.Element | null {
 								color="secondary"
 								onClick={(): void => setShowHistory((v) => !v)}
 								aria-label="Toggle conversations"
-							>
-								<History size={14} />
-							</Button>
+								prefix={<History size={14} />}
+							/>
 						</TooltipSimple>
 
 						<TooltipSimple title="New conversation">
@@ -162,9 +161,8 @@ export default function AIAssistantPanel(): JSX.Element | null {
 								color="secondary"
 								onClick={handleNew}
 								aria-label="New conversation"
-							>
-								<Plus size={14} />
-							</Button>
+								prefix={<Plus size={14} />}
+							/>
 						</TooltipSimple>
 
 						<TooltipSimple title="Open full screen">
@@ -175,9 +173,8 @@ export default function AIAssistantPanel(): JSX.Element | null {
 								onClick={handleExpand}
 								disabled={!activeConversationId}
 								aria-label="Open full screen"
-							>
-								<Maximize2 size={14} />
-							</Button>
+								prefix={<Maximize2 size={14} />}
+							/>
 						</TooltipSimple>
 
 						<TooltipSimple title="Close">
@@ -187,9 +184,8 @@ export default function AIAssistantPanel(): JSX.Element | null {
 								color="secondary"
 								onClick={closeDrawer}
 								aria-label="Close panel"
-							>
-								<X size={14} />
-							</Button>
+								prefix={<X size={14} />}
+							/>
 						</TooltipSimple>
 					</div>
 				</div>

frontend/src/container/AIAssistant/AIAssistantTrigger/AIAssistantTrigger.tsx

@@ -6,7 +6,7 @@ import logEvent from 'api/common/logEvent';
 import ROUTES from 'constants/routes';
 import { Bot } from '@signozhq/icons';
 
-import { AIAssistantEvents } from '../events';
+import { AIAssistantEvents, AIAssistantOpenSource } from '../events';
 import { normalizePage } from '../hooks/useAIAssistantAnalyticsContext';
 import {
 	openAIAssistant,
@@ -31,7 +31,7 @@ export default function AIAssistantTrigger(): JSX.Element | null {
 
 	const handleOpen = useCallback((): void => {
 		void logEvent(AIAssistantEvents.Opened, {
-			source: 'icon',
+			source: AIAssistantOpenSource.Icon,
 			currentPage: normalizePage(pathname),
 		});
 		openAIAssistant();

frontend/src/container/AIAssistant/ConversationView/ConversationView.tsx

@@ -159,6 +159,7 @@ export default function ConversationView({
 				<ConversationSkeleton />
 				<div className={inputWrapperClass}>
 					<ChatInput
+						key={conversationId}
 						onSend={handleSend}
 						disabled
 						autoContexts={autoContexts}
@@ -172,6 +173,7 @@ export default function ConversationView({
 	return (
 		<div className={styles.conversation}>
 			<VirtualizedMessages
+				key={conversationId}
 				conversationId={conversationId}
 				messages={messages}
 				isStreaming={isStreamingHere}
@@ -184,6 +186,7 @@ export default function ConversationView({
 			)}
 			<div className={inputWrapperClass}>
 				<ChatInput
+					key={conversationId}
 					onSend={handleSend}
 					onCancel={handleCancel}
 					disabled={inputDisabled}

frontend/src/container/AIAssistant/components/ApprovalCard/ApprovalCard.tsx

@@ -11,6 +11,7 @@ import {
 	DialogTitle,
 } from '@signozhq/ui/dialog';
 import { ToggleGroup, ToggleGroupItem } from '@signozhq/ui/toggle-group';
+import { TooltipSimple } from '@signozhq/ui/tooltip';
 import type {
 	ApprovalEventDTO,
 	ApprovalEventDTODiff,
@@ -100,16 +101,16 @@ export default function ApprovalCard({
 				<div className={styles.diffSection}>
 					<div className={styles.diffHeader}>
 						<span className={styles.diffHeaderLabel}>Diff</span>
-						<Button
-							variant="link"
-							size="sm"
-							color="secondary"
-							onClick={(): void => setDiffExpanded(true)}
-							title="Expand diff"
-							aria-label="Expand diff"
-						>
-							<Maximize2 size={12} />
-						</Button>
+						<TooltipSimple title="Expand diff">
+							<Button
+								variant="link"
+								size="sm"
+								color="secondary"
+								onClick={(): void => setDiffExpanded(true)}
+								aria-label="Expand diff"
+								prefix={<Maximize2 size={12} />}
+							/>
+						</TooltipSimple>
 					</div>
 					<DiffView diff={approval.diff} />
 				</div>
@@ -119,6 +120,8 @@ export default function ApprovalCard({
 				<DialogContent
 					className={styles.diffDialog}
 					style={{ width: '80vw', maxWidth: '80vw', height: '70vh' }}
+					// Skip auto-focus — otherwise the first Copy button opens its tooltip on dialog open.
+					onOpenAutoFocus={(e): void => e.preventDefault()}
 				>
 					<DialogHeader>
 						<DialogTitle>Approval diff</DialogTitle>
@@ -134,19 +137,22 @@ export default function ApprovalCard({
 								size="sm"
 								value={viewMode}
 								onChange={(next): void => {
-									// Radix `single` group can emit '' when the active item
-									// is clicked again — preserve the current mode.
+									// Radix `single` group can emit '' when the active item is clicked again.
 									if (next === 'split' || next === 'unified') {
 										setViewMode(next);
 									}
 								}}
 							>
-								<ToggleGroupItem value="split" aria-label="Split view">
-									<Columns2 size={12} />
-								</ToggleGroupItem>
-								<ToggleGroupItem value="unified" aria-label="Unified view">
-									<List size={12} />
-								</ToggleGroupItem>
+								<TooltipSimple title="Split view">
+									<ToggleGroupItem value="split" aria-label="Split view">
+										<Columns2 size={12} />
+									</ToggleGroupItem>
+								</TooltipSimple>
+								<TooltipSimple title="Unified view">
+									<ToggleGroupItem value="unified" aria-label="Unified view">
+										<List size={12} />
+									</ToggleGroupItem>
+								</TooltipSimple>
 							</ToggleGroup>
 							<ToggleGroup
 								type="multiple"
@@ -154,12 +160,16 @@ export default function ApprovalCard({
 								value={wrapText ? ['wrap'] : []}
 								onChange={(next): void => setWrapText(next.includes('wrap'))}
 							>
-								<ToggleGroupItem
-									value="wrap"
-									aria-label={wrapText ? 'Disable text wrap' : 'Wrap long lines'}
+								<TooltipSimple
+									title={wrapText ? 'Disable text wrap' : 'Wrap long lines'}
 								>
-									<WrapText size={12} />
-								</ToggleGroupItem>
+									<ToggleGroupItem
+										value="wrap"
+										aria-label={wrapText ? 'Disable text wrap' : 'Wrap long lines'}
+									>
+										<WrapText size={12} />
+									</ToggleGroupItem>
+								</TooltipSimple>
 							</ToggleGroup>
 						</div>
 						{approval.diff && (
@@ -457,15 +467,16 @@ function CopyButton({ text, label }: CopyButtonProps): JSX.Element {
 	};
 
 	return (
-		<Button
-			variant="ghost"
-			size="sm"
-			color="secondary"
-			onClick={handleCopy}
-			title={copied ? `Copied ${label}` : `Copy ${label}`}
-			aria-label={copied ? `Copied ${label}` : `Copy ${label}`}
-		>
-			{copied ? <Check size={12} /> : <Copy size={12} />}
-		</Button>
+		<TooltipSimple title={copied ? `Copied ${label}` : `Copy ${label}`}>
+			<Button
+				variant="ghost"
+				size="sm"
+				color="secondary"
+				onClick={handleCopy}
+				aria-label={copied ? `Copied ${label}` : `Copy ${label}`}
+			>
+				{copied ? <Check size={12} /> : <Copy size={12} />}
+			</Button>
+		</TooltipSimple>
 	);
 }

frontend/src/container/AIAssistant/components/ChatInput/ChatInput.module.scss

@@ -8,12 +8,7 @@
 	border-radius: var(--radius-2);
 	padding: 8px;
 	border: 1px solid var(--l1-border);
-	transition: border-color 0.15s;
 	position: relative;
-
-	&:focus-within {
-		border-color: var(--l1-border);
-	}
 }
 
 .attachments {
@@ -129,6 +124,18 @@
 	border: 1px solid var(--l2-border);
 	border-radius: var(--radius-2);
 	padding: 4px;
+	transition:
+		border-color 0.15s,
+		box-shadow 0.15s;
+
+	// Scope the focus ring to the textarea row only — the surrounding
+	// chrome (context chips, "Add Context", mic, send) sits outside this
+	// element and stays unaffected when the cursor enters the textarea.
+	&:focus-within {
+		border-color: var(--accent-primary);
+		box-shadow: 0 0 0 1px
+			color-mix(in srgb, var(--accent-primary), transparent 70%);
+	}
 }
 
 .footer {
@@ -244,16 +251,24 @@
 }
 
 .contextPopoverCategoryItem {
+	// Override DS Button's centered layout.
+	--button-justify-content: flex-start;
 	display: flex;
 	align-items: center;
+	justify-content: flex-start;
 	gap: 8px;
+	width: 100%;
 	height: 32px;
 	padding: 0 8px;
-	border: 1px solid color-mix(in srgb, var(--l1-foreground), transparent 96%);
-	border-radius: var(--radius-2);
+	background: transparent;
+	color: inherit;
+	font: inherit;
 	font-size: 12px;
 	font-weight: 550;
 	text-align: left;
+	border: 1px solid color-mix(in srgb, var(--l1-foreground), transparent 96%);
+	border-radius: var(--radius-2);
+	appearance: none;
 	cursor: pointer;
 	transition:
 		background 0.15s ease,
@@ -309,17 +324,24 @@
 }
 
 .contextPopoverEntityItem {
+	// Override DS Button's centered layout.
+	--button-justify-content: flex-start;
 	display: flex;
 	align-items: center;
+	justify-content: flex-start;
 	gap: 10px;
+	width: 100%;
 	padding: 8px;
-	border: 1px solid color-mix(in srgb, var(--l1-foreground), transparent 96%);
-	border-radius: var(--radius-2);
+	background: transparent;
 	color: var(--l1-foreground);
+	font: inherit;
 	font-size: 12px;
 	font-weight: 500;
 	line-height: 1.35;
 	text-align: left;
+	border: 1px solid color-mix(in srgb, var(--l1-foreground), transparent 96%);
+	border-radius: var(--radius-2);
+	appearance: none;
 	cursor: pointer;
 	// Required for the inner span's `text-overflow: ellipsis` to engage —
 	// flex items default to `min-width: auto` (intrinsic width) and would
@@ -385,6 +407,11 @@
 	border-radius: 50%;
 	border: none;
 	cursor: pointer;
+	// Reset native <button> defaults so the 24px circle isn't inflated by
+	// browser-default padding / font metrics.
+	padding: 0;
+	font: inherit;
+	appearance: none;
 }
 
 .micDiscard {

frontend/src/container/AIAssistant/components/ChatInput/ChatInput.tsx

@@ -1,4 +1,10 @@
-import { useCallback, useEffect, useRef, useState } from 'react';
+import {
+	useCallback,
+	useEffect,
+	useLayoutEffect,
+	useRef,
+	useState,
+} from 'react';
 import { useQueryClient } from 'react-query';
 import cx from 'classnames';
 import { Badge } from '@signozhq/ui/badge';
@@ -26,7 +32,11 @@ import { useSelector } from 'react-redux';
 import { AppState } from 'store/reducers';
 import { GlobalReducer } from 'types/reducer/globalTime';
 
-import { AIAssistantEvents, getBrowserInfo } from '../../events';
+import {
+	AIAssistantEvents,
+	VoiceInputSource,
+	getBrowserInfo,
+} from '../../events';
 import { useAIAssistantAnalyticsContext } from '../../hooks/useAIAssistantAnalyticsContext';
 import { useSpeechRecognition } from '../../hooks/useSpeechRecognition';
 import { MessageAttachment } from '../../types';
@@ -142,6 +152,10 @@ function autoContextCategory(ctx: MessageContext): string {
 
 const MAX_INPUT_LENGTH = 20000;
 const WARNING_THRESHOLD = 15000;
+// Cap for the auto-growing composer. Past this, the textarea stops growing
+// and starts scrolling internally so the message list above doesn't get
+// squeezed in tighter container variants (e.g. the floating panel).
+const TEXTAREA_MAX_HEIGHT_PX = 200;
 const HOME_SERVICES_INTERVAL = 30 * 60 * 1000;
 /** sessionStorage key for the "voice input failed this tab" flag. */
 const VOICE_UNAVAILABLE_KEY = 'ai-assistant-voice-unavailable';
@@ -224,6 +238,18 @@ export default function ChatInput({
 	const [activeContextCategory, setActiveContextCategory] =
 		useState<ContextCategory>('Dashboards');
 	const [pickerSearchQuery, setPickerSearchQuery] = useState('');
+	// Refs to each category tab so we can move DOM focus to the newly-active
+	// tab on ArrowUp/ArrowDown. Without this the roving-tabindex pattern
+	// stalls: focus stays on the original button (whose closure has the old
+	// category), so subsequent arrow keys never advance past the second tab.
+	const categoryTabRefs = useRef(
+		new Map<ContextCategory, HTMLButtonElement | null>(),
+	);
+	// Refs to each entity row in the active tab panel, so we can cross from
+	// the category tablist (ArrowRight) into the panel and step through
+	// entities with ArrowUp/Down. Array is rewritten each render — there's
+	// only ever one tab panel mounted so stale indices clear naturally.
+	const entityRefs = useRef<(HTMLButtonElement | null)[]>([]);
 	const queryClient = useQueryClient();
 
 	// When the picker was opened by typing `@` in the textarea, this holds the
@@ -303,11 +329,92 @@ export default function ChatInput({
 		[mentionRange, selectedContexts, text],
 	);
 
+	const focusCategory = useCallback((category: ContextCategory) => {
+		setActiveContextCategory(category);
+		setPickerSearchQuery('');
+		categoryTabRefs.current.get(category)?.focus();
+	}, []);
+
+	const handleCategoryKeyDown = useCallback(
+		(
+			e: React.KeyboardEvent<HTMLButtonElement>,
+			category: ContextCategory,
+		): void => {
+			const total = CONTEXT_CATEGORIES.length;
+			const idx = CONTEXT_CATEGORIES.indexOf(category);
+			if (e.key === 'ArrowDown') {
+				e.preventDefault();
+				focusCategory(CONTEXT_CATEGORIES[(idx + 1) % total]);
+			} else if (e.key === 'ArrowUp') {
+				e.preventDefault();
+				focusCategory(CONTEXT_CATEGORIES[(idx - 1 + total) % total]);
+			} else if (e.key === 'Home') {
+				e.preventDefault();
+				focusCategory(CONTEXT_CATEGORIES[0]);
+			} else if (e.key === 'End') {
+				e.preventDefault();
+				focusCategory(CONTEXT_CATEGORIES[total - 1]);
+			} else if (e.key === 'ArrowRight') {
+				// Cross from tablist into entity panel.
+				e.preventDefault();
+				entityRefs.current[0]?.focus();
+			}
+		},
+		[focusCategory],
+	);
+
+	const handleEntityKeyDown = useCallback(
+		(e: React.KeyboardEvent<HTMLButtonElement>, index: number): void => {
+			const count = entityRefs.current.length;
+			if (count === 0) {
+				return;
+			}
+			const focusAt = (i: number): void => {
+				e.preventDefault();
+				entityRefs.current[i]?.focus();
+			};
+			switch (e.key) {
+				case 'ArrowDown':
+					focusAt((index + 1) % count);
+					break;
+				case 'ArrowUp':
+					focusAt((index - 1 + count) % count);
+					break;
+				case 'Home':
+					focusAt(0);
+					break;
+				case 'End':
+					focusAt(count - 1);
+					break;
+				case 'ArrowLeft':
+					// Cross back to tablist.
+					e.preventDefault();
+					categoryTabRefs.current.get(activeContextCategory)?.focus();
+					break;
+				default:
+			}
+		},
+		[activeContextCategory],
+	);
+
 	// Focus the textarea when this component mounts (panel/modal open)
 	useEffect(() => {
 		textareaRef.current?.focus();
 	}, []);
 
+	// Auto-grow the textarea so long prompts aren't trapped in a 2-line
+	// scrolling porthole. Reset to `auto` first to let the field shrink back
+	// down when the user deletes content, then snap to scrollHeight capped at
+	// TEXTAREA_MAX_HEIGHT_PX (overflow-y: auto in CSS handles the rest).
+	useLayoutEffect(() => {
+		const el = textareaRef.current;
+		if (!el) {
+			return;
+		}
+		el.style.height = 'auto';
+		el.style.height = `${Math.min(el.scrollHeight, TEXTAREA_MAX_HEIGHT_PX)}px`;
+	}, [text]);
+
 	const handleSend = useCallback(async () => {
 		const trimmed = text.trim();
 		if (!trimmed && pendingFiles.length === 0) {
@@ -382,7 +489,7 @@ export default function ChatInput({
 	// start time so we can attribute `durationMs` on the Voice input used
 	// event regardless of which control ended the session.
 	const voiceStartedAtRef = useRef<number | null>(null);
-	const voiceSourceRef = useRef<'button' | 'shortcut' | null>(null);
+	const voiceSourceRef = useRef<VoiceInputSource | null>(null);
 	// Set to true after a `network`, `not-allowed`, or `not-supported` failure
 	// so we hide the mic button for the rest of the tab session — silent
 	// retries don't help, and Chromium derivatives without the Google Speech
@@ -459,7 +566,7 @@ export default function ChatInput({
 	const showMic = isSupported && micPermission !== 'denied' && !voiceUnavailable;
 
 	const startVoiceInput = useCallback(
-		(source: 'button' | 'shortcut') => {
+		(source: VoiceInputSource) => {
 			// Defense in depth: the button is hidden when `voiceUnavailable` is
 			// true, but the PTT shortcut listener can still call us. Bailing here
 			// keeps a single source of truth and prevents repeat `Voice input
@@ -536,7 +643,7 @@ export default function ChatInput({
 				return; // ignore auto-repeat
 			}
 			pttActiveRef.current = true;
-			startVoiceInput('shortcut');
+			startVoiceInput(VoiceInputSource.Shortcut);
 		};
 
 		const handleKeyUp = (e: KeyboardEvent): void => {
@@ -724,6 +831,12 @@ export default function ChatInput({
 				entity.value.toLowerCase().includes(activeQuery),
 			)
 		: contextEntitiesByCategory[activeContextCategory];
+	// Truncate the ref array to match the current entity count so that
+	// switching from a large category (e.g. 100 dashboards) to a smaller one
+	// doesn't leave stale `null` slots from earlier renders. Keyboard nav math
+	// already uses `filteredContextOptions.length` for the modulo, so stale
+	// slots wouldn't be reached — this is purely housekeeping.
+	entityRefs.current.length = filteredContextOptions.length;
 	const { isLoading: isActiveContextLoading, isError: isActiveContextError } =
 		contextCategoryStateByCategory[activeContextCategory];
 	const currentLength = text.length;
@@ -830,7 +943,7 @@ export default function ChatInput({
 					onKeyDown={handleKeyDown}
 					disabled={disabled}
 					maxLength={MAX_INPUT_LENGTH}
-					rows={2}
+					rows={3}
 				/>
 			</div>
 			{showTextWarning && (
@@ -877,15 +990,37 @@ export default function ChatInput({
 							sideOffset={8}
 						>
 							<div className={styles.contextPopoverContent}>
-								<div className={styles.contextPopoverCategories}>
+								<div
+									className={styles.contextPopoverCategories}
+									role="tablist"
+									aria-orientation="vertical"
+									aria-label="Context categories"
+								>
 									{CONTEXT_CATEGORIES.map((category) => {
 										const CategoryIcon = CONTEXT_CATEGORY_ICONS[category];
 										const isActive = activeContextCategory === category;
 										return (
-											<div
+											<Button
 												key={category}
+												ref={(el): void => {
+													categoryTabRefs.current.set(category, el);
+												}}
+												type="button"
+												variant="ghost"
+												color="secondary"
+												size="sm"
 												role="tab"
-												tabIndex={0}
+												id={`ai-context-tab-${category}`}
+												// Single stable panel id shared by every tab: only the
+												// active category's tabpanel is rendered, so per-category
+												// `aria-controls` ids would point at nonexistent nodes
+												// for the two inactive tabs. APG allows a single
+												// dynamic panel whose `aria-labelledby` swaps to the
+												// active tab.
+												aria-controls="ai-context-tabpanel"
+												// Roving tabindex: only the active tab participates in
+												// the Tab sequence; arrow keys move between tabs.
+												tabIndex={isActive ? 0 : -1}
 												aria-selected={isActive}
 												className={cx(styles.contextPopoverCategoryItem, {
 													[styles.active]: isActive,
@@ -894,22 +1029,21 @@ export default function ChatInput({
 													setActiveContextCategory(category);
 													setPickerSearchQuery('');
 												}}
-												onKeyDown={(e): void => {
-													if (e.key === 'Enter' || e.key === ' ') {
-														e.preventDefault();
-														setActiveContextCategory(category);
-														setPickerSearchQuery('');
-													}
-												}}
+												onKeyDown={(e): void => handleCategoryKeyDown(e, category)}
+												prefix={<CategoryIcon size={13} />}
 											>
-												<CategoryIcon size={13} />
 												<span>{category}</span>
-											</div>
+											</Button>
 										);
 									})}
 								</div>
 
-								<div className={styles.contextPopoverRight}>
+								<div
+									className={styles.contextPopoverRight}
+									role="tabpanel"
+									id="ai-context-tabpanel"
+									aria-labelledby={`ai-context-tab-${activeContextCategory}`}
+								>
 									<div className={styles.contextPopoverSearch}>
 										<Input
 											type="text"
@@ -939,7 +1073,7 @@ export default function ChatInput({
 												No matching entities
 											</div>
 										) : (
-											filteredContextOptions.map((option) => {
+											filteredContextOptions.map((option, index) => {
 												const isSelected = selectedContexts.some(
 													(item) =>
 														item.category === activeContextCategory &&
@@ -947,8 +1081,16 @@ export default function ChatInput({
 												);
 
 												return (
-													<div
+													<Button
 														key={option.id}
+														ref={(el): void => {
+															entityRefs.current[index] = el;
+														}}
+														type="button"
+														variant="ghost"
+														color="secondary"
+														size="sm"
+														aria-pressed={isSelected}
 														className={cx(styles.contextPopoverEntityItem, {
 															[styles.selected]: isSelected,
 														})}
@@ -959,11 +1101,12 @@ export default function ChatInput({
 																option.value,
 															)
 														}
+														onKeyDown={(e): void => handleEntityKeyDown(e, index)}
 													>
 														<span className={styles.contextPopoverEntityItemText}>
 															{option.value}
 														</span>
-													</div>
+													</Button>
 												);
 											})
 										)}
@@ -977,14 +1120,24 @@ export default function ChatInput({
 				<div className={styles.rightActions}>
 					{showMic &&
 						(isListening ? (
-							<div className={styles.micRecording}>
-								<div
-									className={cx(styles.micDiscard, styles.secondary)}
-									onClick={handleDiscard}
-									aria-label="Discard recording"
-								>
-									<X size={12} />
-								</div>
+							<div
+								className={styles.micRecording}
+								role="status"
+								aria-live="polite"
+								aria-label="Recording voice input"
+							>
+								<TooltipSimple title="Discard recording">
+									<Button
+										type="button"
+										variant="ghost"
+										size="icon"
+										color="secondary"
+										className={cx(styles.micDiscard, styles.secondary)}
+										onClick={handleDiscard}
+										aria-label="Discard recording"
+										prefix={<X size={12} />}
+									/>
+								</TooltipSimple>
 								<span className={styles.micWaves} aria-hidden="true">
 									<span />
 									<span />
@@ -995,26 +1148,30 @@ export default function ChatInput({
 									<span />
 									<span />
 								</span>
-								<div
-									className={cx(styles.micStop, styles.destructive)}
-									onClick={handleStopAndSend}
-									aria-label="Stop and send"
-								>
-									<Square size={9} fill="currentColor" strokeWidth={0} />
-								</div>
+								<TooltipSimple title="Stop and send">
+									<Button
+										type="button"
+										variant="ghost"
+										size="icon"
+										color="destructive"
+										className={cx(styles.micStop, styles.destructive)}
+										onClick={handleStopAndSend}
+										aria-label="Stop and send"
+										prefix={<Square size={9} fill="currentColor" strokeWidth={0} />}
+									/>
+								</TooltipSimple>
 							</div>
 						) : (
 							<TooltipSimple title="Voice input">
 								<Button
 									variant="ghost"
 									size="icon"
-									onClick={(): void => startVoiceInput('button')}
+									onClick={(): void => startVoiceInput(VoiceInputSource.Button)}
 									disabled={disabled}
 									aria-label="Start voice input"
 									className={styles.micBtn}
-								>
-									<Mic size={14} />
-								</Button>
+									prefix={<Mic size={14} />}
+								/>
 							</TooltipSimple>
 						))}
 
@@ -1026,21 +1183,21 @@ export default function ChatInput({
 								color="destructive"
 								onClick={onCancel}
 								aria-label="Stop generating"
-							>
-								<Square size={10} fill="currentColor" strokeWidth={0} />
-							</Button>
+								prefix={<Square size={10} fill="currentColor" strokeWidth={0} />}
+							/>
 						</TooltipSimple>
 					) : (
-						<Button
-							variant="solid"
-							size="icon"
-							color="primary"
-							onClick={isListening ? handleStopAndSend : handleSend}
-							disabled={disabled || (!text.trim() && pendingFiles.length === 0)}
-							aria-label="Send message"
-						>
-							<Send size={14} />
-						</Button>
+						<TooltipSimple title="Send message">
+							<Button
+								variant="solid"
+								size="icon"
+								color="primary"
+								onClick={isListening ? handleStopAndSend : handleSend}
+								disabled={disabled || (!text.trim() && pendingFiles.length === 0)}
+								aria-label="Send message"
+								prefix={<Send size={14} />}
+							/>
+						</TooltipSimple>
 					)}
 				</div>
 			</div>

frontend/src/container/AIAssistant/components/ClarificationForm/ClarificationForm.module.scss

@@ -64,6 +64,19 @@
 	gap: 4px;
 }
 
+// Mirrors `.field` for the multi_select group, but resets the browser's
+// default `<fieldset>` border/padding/margin so the visual matches the
+// `<div>`-based field rows.
+.multiSelectFieldset {
+	display: flex;
+	flex-direction: column;
+	gap: 4px;
+	margin: 0;
+	padding: 0;
+	border: 0;
+	min-width: 0;
+}
+
 .label {
 	font-size: 12px;
 	font-weight: 500;

frontend/src/container/AIAssistant/components/ClarificationForm/ClarificationForm.tsx

@@ -63,7 +63,14 @@ export default function ClarificationForm({
 		setAnswers((prev) => ({ ...prev, [id]: value }));
 	};
 
+	const isFormValid = fields.every(
+		(f) => !f.required || isFieldFilled(f, answers[f.id]),
+	);
+
 	const handleSubmit = async (): Promise<void> => {
+		if (!isFormValid) {
+			return;
+		}
 		setSubmitted(true);
 		// Approximate queryLength as the JSON encoding of the form answers — the
 		// clarification API doesn't render a single user-visible string, but the
@@ -136,7 +143,7 @@ export default function ClarificationForm({
 					variant="solid"
 					color="primary"
 					onClick={handleSubmit}
-					disabled={isStreaming}
+					disabled={isStreaming || !isFormValid}
 					prefix={<Send />}
 				>
 					Submit
@@ -162,8 +169,9 @@ export default function ClarificationForm({
 
 /**
  * Per-type seed value. The DTO's `default` is `string | string[] | null`,
- * which doesn't fit boolean fields cleanly — we coerce 'true'/'false' strings
- * for them, fall back to `[]` for multi_select, and the raw string otherwise.
+ * which doesn't fit boolean / number fields cleanly — we coerce 'true'/'false'
+ * strings for booleans, parse number defaults out of the string form,
+ * fall back to `[]` for multi_select, and the raw string otherwise.
  */
 function initialAnswerFor(f: ClarificationFieldEventDTO): unknown {
 	const raw = f.default;
@@ -175,9 +183,41 @@ function initialAnswerFor(f: ClarificationFieldEventDTO): unknown {
 	if (f.type === ClarificationFieldTypeDTO.multi_select) {
 		return Array.isArray(raw) ? raw : [];
 	}
+	if (f.type === ClarificationFieldTypeDTO.number) {
+		// Server sends number defaults as strings (e.g. `"5"`). Parse so the
+		// stored value is a real `number` — otherwise `isFieldFilled` (which
+		// requires `typeof === 'number'`) rejects a visibly-filled field and
+		// Submit stays disabled.
+		if (typeof raw !== 'string' || raw === '') {
+			return null;
+		}
+		const parsed = Number(raw);
+		return Number.isNaN(parsed) ? null : parsed;
+	}
 	return raw ?? '';
 }
 
+// Whether a required field has been answered. Booleans are always considered
+// filled (they're initialised to a concrete true/false). For other types we
+// reject empty strings, empty arrays, NaN numbers, and `null` (which the
+// number input emits when its raw value is `''` — `Number('')` would
+// otherwise silently coerce to `0` and read as a valid answer).
+function isFieldFilled(
+	field: ClarificationFieldEventDTO,
+	value: unknown,
+): boolean {
+	switch (field.type) {
+		case ClarificationFieldTypeDTO.multi_select:
+			return Array.isArray(value) && value.length > 0;
+		case ClarificationFieldTypeDTO.boolean:
+			return true;
+		case ClarificationFieldTypeDTO.number:
+			return typeof value === 'number' && !Number.isNaN(value);
+		default:
+			return typeof value === 'string' && value.trim().length > 0;
+	}
+}
+
 interface FieldInputProps {
 	field: ClarificationFieldEventDTO;
 	value: unknown;
@@ -216,13 +256,21 @@ function FieldInput({ field, value, onChange }: FieldInputProps): JSX.Element {
 			<div className={styles.field}>
 				<label className={styles.label} htmlFor={id}>
 					{label}
-					{required && <span className={styles.required}>*</span>}
+					{required && (
+						<span className={styles.required} aria-hidden="true">
+							*
+						</span>
+					)}
 				</label>
 				<Select
 					value={isCustom ? CUSTOM_OPTION_SENTINEL : String(value ?? '')}
 					onChange={handleSelectChange}
 				>
-					<SelectTrigger id={id} placeholder="Select…" />
+					<SelectTrigger
+						id={id}
+						placeholder="Select…"
+						aria-required={required || undefined}
+					/>
 					{/* Pin the dropdown width to the trigger via Radix's
 					    `--radix-select-trigger-width`; otherwise the popover
 					    sizes to its widest item and looks misaligned. */}
@@ -267,7 +315,11 @@ function FieldInput({ field, value, onChange }: FieldInputProps): JSX.Element {
 					onChange={(): void => onChange(!checked)}
 				>
 					{label}
-					{required && <span className={styles.required}>*</span>}
+					{required && (
+						<span className={styles.required} aria-hidden="true">
+							*
+						</span>
+					)}
 				</Checkbox>
 			</div>
 		);
@@ -312,11 +364,21 @@ function FieldInput({ field, value, onChange }: FieldInputProps): JSX.Element {
 		};
 
 		return (
-			<div className={styles.field}>
-				<span className={styles.label}>
+			// `fieldset` + `legend` is the WCAG-recommended grouping for
+			// related checkboxes (1.3.1). SRs announce the legend before each
+			// option, so users hear the group label as context.
+			<fieldset
+				className={styles.multiSelectFieldset}
+				aria-required={required || undefined}
+			>
+				<legend className={styles.label}>
 					{label}
-					{required && <span className={styles.required}>*</span>}
-				</span>
+					{required && (
+						<span className={styles.required} aria-hidden="true">
+							*
+						</span>
+					)}
+				</legend>
 				<div className={styles.checkboxGroup}>
 					{options?.map((opt) => (
 						<Checkbox
@@ -347,7 +409,7 @@ function FieldInput({ field, value, onChange }: FieldInputProps): JSX.Element {
 						onChange={(e): void => updateCustomValue(e.target.value)}
 					/>
 				)}
-			</div>
+			</fieldset>
 		);
 	}
 
@@ -356,16 +418,29 @@ function FieldInput({ field, value, onChange }: FieldInputProps): JSX.Element {
 		<div className={styles.field}>
 			<label className={styles.label} htmlFor={id}>
 				{label}
-				{required && <span className={styles.required}>*</span>}
+				{required && (
+					<span className={styles.required} aria-hidden="true">
+						*
+					</span>
+				)}
 			</label>
 			<Input
 				id={id}
 				type={type === 'number' ? 'number' : 'text'}
 				className={styles.input}
 				value={String(value ?? '')}
-				onChange={(e): void =>
-					onChange(type === 'number' ? Number(e.target.value) : e.target.value)
-				}
+				aria-required={required || undefined}
+				onChange={(e): void => {
+					if (type === 'number') {
+						const raw = e.target.value;
+						// Map empty input to `null` instead of `Number('') === 0`
+						// so a required numeric field cleared after typing doesn't
+						// silently read as a valid `0` in `isFieldFilled`.
+						onChange(raw === '' ? null : Number(raw));
+					} else {
+						onChange(e.target.value);
+					}
+				}}
 				placeholder={label}
 			/>
 		</div>

frontend/src/container/AIAssistant/components/MessageFeedback/MessageFeedback.tsx

@@ -10,6 +10,7 @@ import { useTimezone } from 'providers/Timezone';
 
 import logEvent from 'api/common/logEvent';
 
+import { FeedbackRatingDTO } from 'api/ai-assistant/sigNozAIAssistantAPI.schemas';
 import { AIAssistantEvents } from '../../events';
 import { useAIAssistantAnalyticsContext } from '../../hooks/useAIAssistantAnalyticsContext';
 import { useAIAssistantStore } from '../../store/useAIAssistantStore';
@@ -17,6 +18,22 @@ import { FeedbackRating, Message } from '../../types';
 
 import styles from './MessageFeedback.module.scss';
 
+const FEEDBACK_ANALYTICS_RATING = {
+	[FeedbackRatingDTO.positive]: 'up',
+	[FeedbackRatingDTO.negative]: 'down',
+} as const;
+
+const VOTE_LABEL = {
+	[FeedbackRatingDTO.positive]: {
+		tooltip: 'Good response',
+		ariaLabel: 'Good response',
+	},
+	[FeedbackRatingDTO.negative]: {
+		tooltip: 'Bad response',
+		ariaLabel: 'Bad response',
+	},
+} as const;
+
 interface MessageFeedbackProps {
 	message: Message;
 	onRegenerate?: () => void;
@@ -117,7 +134,7 @@ export default function MessageFeedback({
 			if (vote === rating) {
 				return;
 			}
-			if (rating === 'negative') {
+			if (rating === FeedbackRatingDTO.negative) {
 				setNegativeComment('');
 				setIsNegativeDialogOpen(true);
 				return;
@@ -126,7 +143,7 @@ export default function MessageFeedback({
 			void logEvent(AIAssistantEvents.FeedbackSubmitted, {
 				messageId: message.id,
 				threadId,
-				rating: 'up',
+				rating: FEEDBACK_ANALYTICS_RATING[rating],
 				hasComment: false,
 				commentLength: 0,
 			});
@@ -136,17 +153,21 @@ export default function MessageFeedback({
 	);
 
 	const handleSubmitNegative = useCallback((): void => {
-		setVote('negative');
+		setVote(FeedbackRatingDTO.negative);
 		setIsNegativeDialogOpen(false);
 		const trimmed = negativeComment.trim();
 		void logEvent(AIAssistantEvents.FeedbackSubmitted, {
 			messageId: message.id,
 			threadId,
-			rating: 'down',
+			rating: FEEDBACK_ANALYTICS_RATING[FeedbackRatingDTO.negative],
 			hasComment: trimmed.length > 0,
 			commentLength: trimmed.length,
 		});
-		submitMessageFeedback(message.id, 'negative', trimmed || undefined);
+		submitMessageFeedback(
+			message.id,
+			FeedbackRatingDTO.negative,
+			trimmed || undefined,
+		);
 	}, [message.id, negativeComment, submitMessageFeedback, threadId]);
 
 	return (
@@ -160,32 +181,39 @@ export default function MessageFeedback({
 							variant="ghost"
 							onClick={handleCopy}
 							color="secondary"
+							aria-label={copied ? 'Copied' : 'Copy message'}
 						>
 							{copied ? <Check size={12} /> : <Copy size={12} />}
 						</Button>
 					</TooltipSimple>
 
-					<TooltipSimple title="Good response">
+					<TooltipSimple title={VOTE_LABEL[FeedbackRatingDTO.positive].tooltip}>
 						<Button
-							className={cx(styles.btn, { [styles.votedUp]: vote === 'positive' })}
+							className={cx(styles.btn, {
+								[styles.votedUp]: vote === FeedbackRatingDTO.positive,
+							})}
 							size="icon"
 							variant="ghost"
 							color="secondary"
-							onClick={(): void => handleVote('positive')}
+							onClick={(): void => handleVote(FeedbackRatingDTO.positive)}
+							aria-label={VOTE_LABEL[FeedbackRatingDTO.positive].ariaLabel}
+							aria-pressed={vote === FeedbackRatingDTO.positive}
 						>
 							<ThumbsUp size={12} />
 						</Button>
 					</TooltipSimple>
 
-					<TooltipSimple title="Bad response">
+					<TooltipSimple title={VOTE_LABEL[FeedbackRatingDTO.negative].tooltip}>
 						<Button
 							className={cx(styles.btn, {
-								[styles.votedDown]: vote === 'negative',
+								[styles.votedDown]: vote === FeedbackRatingDTO.negative,
 							})}
 							size="icon"
 							variant="ghost"
 							color="secondary"
-							onClick={(): void => handleVote('negative')}
+							onClick={(): void => handleVote(FeedbackRatingDTO.negative)}
+							aria-label={VOTE_LABEL[FeedbackRatingDTO.negative].ariaLabel}
+							aria-pressed={vote === FeedbackRatingDTO.negative}
 						>
 							<ThumbsDown size={12} />
 						</Button>
@@ -199,6 +227,7 @@ export default function MessageFeedback({
 								variant="ghost"
 								color="secondary"
 								onClick={onRegenerate}
+								aria-label="Regenerate response"
 							>
 								<RefreshCw size={12} />
 							</Button>

frontend/src/container/AIAssistant/components/UserMessageActions/UserMessageActions.tsx

@@ -47,6 +47,7 @@ export default function UserMessageActions({
 					variant="ghost"
 					color="secondary"
 					onClick={handleCopy}
+					aria-label={copied ? 'Copied' : 'Copy message'}
 				>
 					{copied ? <Check size={12} /> : <Copy size={12} />}
 				</Button>

frontend/src/container/AIAssistant/components/VirtualizedMessages/VirtualizedMessages.tsx

@@ -90,6 +90,16 @@ export default function VirtualizedMessages({
 
 	const virtuosoRef = useRef<VirtuosoHandle>(null);
 	const scrollerRef = useRef<HTMLElement | Window | null>(null);
+	// Tracks whether the scroller is pinned to (or near) the bottom. Updated
+	// via Virtuoso's `atBottomStateChange` so we can stop force-scrolling the
+	// user back down when they've intentionally scrolled up to read earlier
+	// content.
+	const atBottomRef = useRef(true);
+	// Id of the latest user message we've already anchored to. Used to detect
+	// a fresh user send so we can re-anchor to the bottom regardless of where
+	// the user was scrolled — sending a message and not seeing it is worse
+	// than the anti-yank guarantee.
+	const lastSeenUserMessageIdRef = useRef<string | null>(null);
 
 	const handleRegenerate = useCallback(
 		(messageId: string): void => {
@@ -111,8 +121,25 @@ export default function VirtualizedMessages({
 	// align: 'end')` would only reach the last item's bottom and leave the
 	// padding hidden below the fold. Use `auto` while streaming so the bottom
 	// stays glued as text deltas arrive; `smooth` lags when triggered every
-	// few ms.
+	// few ms. Bail out if the user has scrolled away from the bottom — that's
+	// an explicit signal they want to read earlier content without being
+	// yanked back.
 	useEffect(() => {
+		const lastMessage = messages[messages.length - 1];
+		const isFreshUserSend =
+			lastMessage?.role === 'user' &&
+			lastMessage.id !== lastSeenUserMessageIdRef.current;
+		if (isFreshUserSend) {
+			lastSeenUserMessageIdRef.current = lastMessage.id;
+			// Re-anchor so the user sees their own send (and the assistant's
+			// follow-up streaming) even if they were reading history when they
+			// hit Enter.
+			atBottomRef.current = true;
+		}
+
+		if (!atBottomRef.current) {
+			return;
+		}
 		const scroller = scrollerRef.current;
 		if (!(scroller instanceof HTMLElement)) {
 			return;
@@ -122,7 +149,7 @@ export default function VirtualizedMessages({
 			behavior: isStreaming ? 'auto' : 'smooth',
 		});
 	}, [
-		messages.length,
+		messages,
 		streamingEvents.length,
 		streamingContentLength,
 		isStreaming,
@@ -132,14 +159,18 @@ export default function VirtualizedMessages({
 
 	const followOutput = useCallback(
 		(atBottom: boolean): false | 'auto' | 'smooth' => {
-			if (isStreaming) {
-				return 'auto';
+			if (!atBottom) {
+				return false;
 			}
-			return atBottom ? 'smooth' : false;
+			return isStreaming ? 'auto' : 'smooth';
 		},
 		[isStreaming],
 	);
 
+	const handleAtBottomStateChange = useCallback((atBottom: boolean): void => {
+		atBottomRef.current = atBottom;
+	}, []);
+
 	const showStreamingSlot =
 		isStreaming || Boolean(pendingApproval) || Boolean(pendingClarification);
 
@@ -188,6 +219,8 @@ export default function VirtualizedMessages({
 			className={styles.messages}
 			totalCount={totalCount}
 			followOutput={followOutput}
+			atBottomStateChange={handleAtBottomStateChange}
+			atBottomThreshold={64}
 			initialTopMostItemIndex={Math.max(0, totalCount - 1)}
 			itemContent={(index): JSX.Element => {
 				if (index < messages.length) {

frontend/src/container/AIAssistant/components/blocks/RichCodeBlock/RichCodeBlock.tsx

@@ -1,6 +1,7 @@
 import React, { useEffect, useRef, useState } from 'react';
 import { useCopyToClipboard } from 'react-use';
 import { Button } from '@signozhq/ui/button';
+import { TooltipSimple } from '@signozhq/ui/tooltip';
 import { Check, Copy } from '@signozhq/icons';
 import SyntaxHighlighter, {
 	a11yDark,
@@ -126,16 +127,17 @@ function CopyButton({ text }: { text: string }): JSX.Element {
 	};
 
 	return (
-		<Button
-			variant="ghost"
-			size="sm"
-			color="secondary"
-			className={styles.copyBtn}
-			onClick={handleCopy}
-			title={copied ? 'Copied' : 'Copy code'}
-			aria-label={copied ? 'Copied' : 'Copy code'}
-		>
-			{copied ? <Check size={12} /> : <Copy size={12} />}
-		</Button>
+		<TooltipSimple title={copied ? 'Copied' : 'Copy code'}>
+			<Button
+				variant="ghost"
+				size="sm"
+				color="secondary"
+				className={styles.copyBtn}
+				onClick={handleCopy}
+				aria-label={copied ? 'Copied' : 'Copy code'}
+			>
+				{copied ? <Check size={12} /> : <Copy size={12} />}
+			</Button>
+		</TooltipSimple>
 	);
 }

frontend/src/container/AIAssistant/events.ts

@@ -63,6 +63,26 @@ export const SuggestedPromptCategory = {
 export type SuggestedPromptCategory =
 	(typeof SuggestedPromptCategory)[keyof typeof SuggestedPromptCategory];
 
+// `source` attribute on the AI Assistant `Opened` event — describes which
+// surface triggered the open. Keep values stable: dashboards downstream
+// depend on the literal strings.
+export const AIAssistantOpenSource = {
+	Icon: 'icon',
+	Shortcut: 'shortcut',
+	Cmdk: 'cmdk',
+} as const;
+export type AIAssistantOpenSource =
+	(typeof AIAssistantOpenSource)[keyof typeof AIAssistantOpenSource];
+
+// `source` attribute on the `VoiceInputUsed` event — which surface initiated
+// the recording.
+export const VoiceInputSource = {
+	Button: 'button',
+	Shortcut: 'shortcut',
+} as const;
+export type VoiceInputSource =
+	(typeof VoiceInputSource)[keyof typeof VoiceInputSource];
+
 export enum AIAssistantEvents {
 	Opened = 'AI Assistant: Opened',
 	MessageSent = 'AI Assistant: Message sent',

frontend/src/container/AppLayout/utils.ts

@@ -1,9 +1,32 @@
 import ROUTES from 'constants/routes';
 
-export function getRouteKey(pathname: string): string {
-	const [routeKey] = Object.entries(ROUTES).find(
-		([, value]) => value === pathname,
-	) || ['DEFAULT'];
+const PARAM_SEGMENT = /:[^/]+/g;
+const REGEX_SPECIALS = /[.+*?^$()[\]{}|\\]/g;
 
-	return routeKey;
+function templateToRegex(template: string): RegExp {
+	const pattern = template
+		.replace(REGEX_SPECIALS, '\\$&')
+		.replace(PARAM_SEGMENT, '[^/]+');
+	return new RegExp(`^${pattern}$`);
+}
+
+export function getRouteKey(pathname: string): string {
+	const entries = Object.entries(ROUTES);
+
+	const exact = entries.find(([, value]) => value === pathname);
+	if (exact) {
+		return exact[0];
+	}
+
+	// First template that matches wins, so declaration order in `ROUTES`
+	// matters when templates can overlap. Today's set is unambiguous because
+	// `[^/]+` is segment-bounded, but if you ever add a sibling like
+	// `/services/list` next to `SERVICE_METRICS: '/services/:servicename'`,
+	// list the more-specific (more-static-segments) entry first in `ROUTES`
+	// — otherwise the param template will swallow the static path.
+	const dynamic = entries.find(
+		([, value]) => value.includes(':') && templateToRegex(value).test(pathname),
+	);
+
+	return dynamic?.[0] ?? 'DEFAULT';
 }

pkg/apiserver/signozapiserver/tracedetail.go

@@ -29,5 +29,24 @@ func (provider *provider) addTraceDetailRoutes(router *mux.Router) error {
 		return err
 	}
 
+	if err := router.Handle("/api/v4/traces/{traceID}/waterfall", handler.New(
+		provider.authzMiddleware.ViewAccess(provider.traceDetailHandler.GetWaterfallV4),
+		handler.OpenAPIDef{
+			ID:                  "GetWaterfallV4",
+			Tags:                []string{"tracedetail"},
+			Summary:             "Get waterfall view for a trace",
+			Description:         "Returns the waterfall view of spans including all spans if total spans are under a limit, a max count otherwise. Aggregations are dropped compared to v3",
+			Request:             new(spantypes.PostableWaterfall),
+			RequestContentType:  "application/json",
+			Response:            new(spantypes.GettableWaterfallTrace),
+			ResponseContentType: "application/json",
+			SuccessStatusCode:   http.StatusOK,
+			ErrorStatusCodes:    []int{http.StatusBadRequest, http.StatusNotFound},
+			SecuritySchemes:     newSecuritySchemes(types.RoleViewer),
+		},
+	)).Methods(http.MethodPost).GetError(); err != nil {
+		return err
+	}
+
 	return nil
 }

pkg/meterreporter/config.go

@@ -1,6 +1,7 @@
 package meterreporter
 
 import (
+	"math/rand/v2"
 	"time"
 
 	"github.com/SigNoz/signoz/pkg/errors"
@@ -15,12 +16,21 @@ type Config struct {
 
 	// Backfill enables sealed-day catch-up from the license creation day.
 	Backfill bool `mapstructure:"backfill"`
+
+	// Jitter is the randomness applied to both the first collect after
+	// Start() and to every subsequent cycle. The first fire happens at a
+	// random time in [0, Jitter); each subsequent cycle takes
+	// Interval - random(0, Jitter). Negative (the default) means "derive
+	// from Interval" via ResolvedJitter, so the value scales with whatever
+	// Interval the user picks.
+	Jitter time.Duration `mapstructure:"jitter"`
 }
 
 func newConfig() factory.Config {
 	return Config{
 		Interval: 6 * time.Hour,
 		Backfill: true,
+		Jitter:   -1, // Negative sentinel. Resolved at use time unless explicitly set.
 	}
 }
 
@@ -29,9 +39,27 @@ func NewConfigFactory() factory.ConfigFactory {
 }
 
 func (c Config) Validate() error {
-	if c.Interval < 5*time.Minute || c.Interval > 24*time.Hour {
-		return errors.New(errors.TypeInvalidInput, ErrCodeInvalidInput, "meterreporter::interval must be between 5m and 24h")
+	if c.Interval < 10*time.Minute || c.Interval > 24*time.Hour {
+		return errors.New(errors.TypeInvalidInput, ErrCodeInvalidInput, "meterreporter::interval must be between 10m and 24h")
+	}
+
+	if c.Jitter >= 0 && (c.Jitter < 10*time.Minute || c.Jitter > c.Interval) {
+		return errors.New(errors.TypeInvalidInput, ErrCodeInvalidInput, "meterreporter::jitter must be between 10m and interval")
 	}
 
 	return nil
 }
+
+// NewJitter returns a fresh random duration sampled uniformly from
+// [0, jitter), where jitter is the configured Jitter or, if the sentinel
+// default is still in place, min(Interval, 2h).
+func (c Config) NewJitter() time.Duration {
+	defaultJitter := 2 * time.Hour
+
+	cap := c.Jitter
+	if cap < 0 {
+		cap = min(c.Interval, defaultJitter)
+	}
+
+	return time.Duration(rand.Int64N(int64(cap)))
+}

pkg/modules/tracedetail/impltracedetail/handler.go

@@ -38,3 +38,24 @@ func (h *handler) GetWaterfall(rw http.ResponseWriter, r *http.Request) {
 
 	render.Success(rw, http.StatusOK, result)
 }
+
+func (h *handler) GetWaterfallV4(rw http.ResponseWriter, r *http.Request) {
+	req := new(spantypes.PostableWaterfall)
+	if err := binding.JSON.BindBody(r.Body, req); err != nil {
+		render.Error(rw, err)
+		return
+	}
+
+	if err := req.Validate(); err != nil {
+		render.Error(rw, err)
+		return
+	}
+
+	result, err := h.module.GetWaterfallV4(r.Context(), mux.Vars(r)["traceID"], req.SelectedSpanID, req.UncollapsedSpans, req.Limit)
+	if err != nil {
+		render.Error(rw, err)
+		return
+	}
+
+	render.Success(rw, http.StatusOK, result)
+}

pkg/modules/tracedetail/impltracedetail/module.go

@@ -2,6 +2,7 @@ package impltracedetail
 
 import (
 	"context"
+	"time"
 
 	"github.com/SigNoz/signoz/pkg/factory"
 	"github.com/SigNoz/signoz/pkg/modules/tracedetail"
@@ -45,7 +46,7 @@ func (m *module) GetWaterfall(ctx context.Context, traceID string, req *spantype
 	return spantypes.NewGettableWaterfallTrace(waterfallTrace, selectedSpans, uncollapsedSpans, selectedAllSpans, aggregationResults), nil
 }
 
-// getTraceData returns the waterfall cache for the given traceID with fallback on DB.
+// getTraceData fetches all spans for a trace and builds the WaterfallTrace.
 func (m *module) getTraceData(ctx context.Context, traceID string) (*spantypes.WaterfallTrace, error) {
 	summary, err := m.store.GetTraceSummary(ctx, traceID)
 	if err != nil {
@@ -61,6 +62,86 @@ func (m *module) getTraceData(ctx context.Context, traceID string) (*spantypes.W
 		return nil, spantypes.ErrTraceNotFound
 	}
 
-	traceData := spantypes.NewWaterfallTraceFromSpans(spanItems)
-	return traceData, nil
+	nodes := make([]*spantypes.WaterfallSpan, len(spanItems))
+	for i := range spanItems {
+		nodes[i] = spanItems[i].ToWaterfallSpan(traceID)
+	}
+	return spantypes.NewWaterfallTraceFromSpans(nodes), nil
+}
+
+// GetWaterfallV4 is the OOM-safe V4 waterfall.
+// For large traces (NumSpans > effectiveLimit) it uses a two-step fetch:
+// minimal fields for all spans to build the tree, then full fields for the
+// visible window only. Aggregations are not returned.
+func (m *module) GetWaterfallV4(ctx context.Context, traceID string, selectedSpanID string, uncollapsedSpans []string, selectAllLimit uint) (*spantypes.GettableWaterfallTrace, error) {
+	summary, err := m.store.GetTraceSummary(ctx, traceID)
+	if err != nil {
+		return nil, err
+	}
+	effectiveLimit := min(selectAllLimit, m.config.Waterfall.MaxLimitToSelectAllSpans)
+	if summary.NumSpans > uint64(effectiveLimit) {
+		return m.getWindowedWaterfall(ctx, traceID, selectedSpanID, uncollapsedSpans, summary.Start, summary.End)
+	}
+	return m.getFullWaterfall(ctx, traceID, summary)
+}
+
+func (m *module) getFullWaterfall(ctx context.Context, traceID string, summary *spantypes.TraceSummary) (*spantypes.GettableWaterfallTrace, error) {
+	spanItems, err := m.store.GetTraceSpans(ctx, traceID, summary)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(spanItems) == 0 {
+		return nil, spantypes.ErrTraceNotFound
+	}
+
+	nodes := make([]*spantypes.WaterfallSpan, len(spanItems))
+	for i := range spanItems {
+		nodes[i] = spanItems[i].ToWaterfallSpan(traceID)
+	}
+	waterfallTrace := spantypes.NewWaterfallTraceFromSpans(nodes)
+	selectedSpans := waterfallTrace.GetAllSpans()
+
+	return spantypes.NewGettableWaterfallTrace(waterfallTrace, selectedSpans, nil, true, nil), nil
+}
+
+// getWindowedWaterfall builds the waterfall tree with minimal data and then returns only a window of full spans.
+func (m *module) getWindowedWaterfall(ctx context.Context, traceID, selectedSpanID string, uncollapsedSpans []string, start, end time.Time) (*spantypes.GettableWaterfallTrace, error) {
+	// Step 1: minimal fetch → build full tree → select visible window
+	minimalSpans, err := m.store.GetMinimalSpans(ctx, traceID, start, end)
+	if err != nil {
+		return nil, err
+	}
+	if len(minimalSpans) == 0 {
+		return nil, spantypes.ErrTraceNotFound
+	}
+
+	nodes := make([]*spantypes.WaterfallSpan, len(minimalSpans))
+	for i := range minimalSpans {
+		nodes[i] = minimalSpans[i].ToWaterfallSpan(traceID)
+	}
+	waterfallTrace := spantypes.NewWaterfallTraceFromSpans(nodes)
+
+	selectedSpans, uncollapsedSpans := waterfallTrace.GetSelectedSpans(
+		uncollapsedSpans,
+		selectedSpanID,
+		m.config.Waterfall.SpanPageSize,
+		m.config.Waterfall.MaxDepthToAutoExpand,
+	)
+
+	// Step 2: full fetch for the selected window only
+	spanIDs := make([]string, len(selectedSpans))
+	for i, s := range selectedSpans {
+		spanIDs[i] = s.SpanID
+	}
+	fullSpans, err := m.store.GetTraceSpansByIDs(ctx, traceID, start, end, spanIDs)
+	if err != nil {
+		return nil, err
+	}
+
+	spantypes.EnrichSelectedSpans(selectedSpans, fullSpans)
+
+	return spantypes.NewGettableWaterfallTrace(
+		waterfallTrace, selectedSpans, uncollapsedSpans, false, nil,
+	), nil
 }

pkg/modules/tracedetail/impltracedetail/store.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"fmt"
+	"time"
 
 	sqlbuilder "github.com/huandu/go-sqlbuilder"
 
@@ -12,6 +13,8 @@ import (
 	"github.com/SigNoz/signoz/pkg/types/spantypes"
 )
 
+const colServiceName = `resource_string_service$$$$name` // $ gets escaped so $$$$ converts to $$.
+
 type traceStore struct {
 	telemetryStore telemetrystore.TelemetryStore
 }
@@ -45,8 +48,8 @@ func (s *traceStore) GetTraceSpans(ctx context.Context, traceID string, summary
 	// DISTINCT ON (span_id) is ClickHouse-specific syntax not supported by sqlbuilder
 	query := fmt.Sprintf(`
 		SELECT DISTINCT ON (span_id)
-			timestamp, duration_nano, span_id, trace_id, has_error, kind,
-			resource_string_service$$name, name, links as references,
+			timestamp, duration_nano, span_id, has_error, kind,
+			resource_string_service$$name, name,
 			attributes_string, attributes_number, attributes_bool, resources_string,
 			events, status_message, status_code_string, kind_string, parent_span_id,
 			flags, is_remote, trace_state, status_code,
@@ -69,3 +72,64 @@ func (s *traceStore) GetTraceSpans(ctx context.Context, traceID string, summary
 	}
 	return spanItems, nil
 }
+
+func (s *traceStore) GetMinimalSpans(ctx context.Context, traceID string, start, end time.Time) ([]spantypes.MinimalSpan, error) {
+	sb := sqlbuilder.NewSelectBuilder()
+	sb.Select(
+		"DISTINCT ON (span_id) span_id",
+		"parent_span_id", "timestamp", "duration_nano", "has_error",
+		colServiceName,
+	)
+	sb.From(fmt.Sprintf("%s.%s", spantypes.TraceDB, spantypes.TraceTable))
+	sb.Where(
+		sb.E("trace_id", traceID),
+		sb.GE("ts_bucket_start", start.Unix()-1800),
+		sb.LE("ts_bucket_start", end.Unix()),
+	)
+	sb.OrderByAsc("timestamp")
+	sb.OrderByAsc("name")
+	query, args := sb.BuildWithFlavor(sqlbuilder.ClickHouse)
+
+	var spans []spantypes.MinimalSpan
+	if err := s.telemetryStore.ClickhouseDB().Select(ctx, &spans, query, args...); err != nil {
+		return nil, errors.WrapInternalf(err, errors.CodeInternal, "error querying minimal spans")
+	}
+	return spans, nil
+}
+
+func (s *traceStore) GetTraceSpansByIDs(ctx context.Context, traceID string, start, end time.Time, spanIDs []string) ([]spantypes.StorableSpan, error) {
+	if len(spanIDs) == 0 {
+		return []spantypes.StorableSpan{}, nil
+	}
+	sb := sqlbuilder.NewSelectBuilder()
+	sb.Select(
+		"DISTINCT ON (span_id) timestamp",
+		"duration_nano", "span_id", "has_error", "kind",
+		colServiceName, "name",
+		"attributes_string", "attributes_number", "attributes_bool", "resources_string",
+		"events", "status_message", "status_code_string", "kind_string", "parent_span_id",
+		"flags", "is_remote", "trace_state", "status_code",
+		"db_name", "db_operation", "http_method", "http_url", "http_host",
+		"external_http_method", "external_http_url", "response_status_code",
+	)
+	sb.From(fmt.Sprintf("%s.%s", spantypes.TraceDB, spantypes.TraceTable))
+	ids := make([]any, len(spanIDs))
+	for i, id := range spanIDs {
+		ids[i] = id
+	}
+	sb.Where(
+		sb.E("trace_id", traceID),
+		sb.In("span_id", ids...),
+		sb.GE("ts_bucket_start", start.Unix()-1800),
+		sb.LE("ts_bucket_start", end.Unix()),
+	)
+	sb.OrderByAsc("timestamp")
+	sb.OrderByAsc("name")
+	query, args := sb.BuildWithFlavor(sqlbuilder.ClickHouse)
+
+	var spans []spantypes.StorableSpan
+	if err := s.telemetryStore.ClickhouseDB().Select(ctx, &spans, query, args...); err != nil {
+		return nil, errors.WrapInternalf(err, errors.CodeInternal, "error querying trace spans by IDs")
+	}
+	return spans, nil
+}

pkg/modules/tracedetail/tracedetail.go

@@ -10,9 +10,11 @@ import (
 // Handler exposes HTTP handlers for trace detail APIs.
 type Handler interface {
 	GetWaterfall(http.ResponseWriter, *http.Request)
+	GetWaterfallV4(http.ResponseWriter, *http.Request)
 }
 
 // Module defines the business logic for trace detail operations.
 type Module interface {
 	GetWaterfall(ctx context.Context, traceID string, req *spantypes.PostableWaterfall) (*spantypes.GettableWaterfallTrace, error)
+	GetWaterfallV4(ctx context.Context, traceID string, selectedSpanID string, uncollapsedSpans []string, selectAllLimit uint) (*spantypes.GettableWaterfallTrace, error)
 }

pkg/querier/builder_query.go

@@ -19,6 +19,8 @@ import (
 	"github.com/SigNoz/signoz/pkg/types/telemetrytypes"
 )
 
+const traceOutsideRangeWarn = "Query %s references a trace_id that exists between %s and %s (UTC) but lies outside the selected time range; adjust the time range to see results"
+
 type builderQuery[T any] struct {
 	logger         *slog.Logger
 	telemetryStore telemetrystore.TelemetryStore
@@ -199,7 +201,21 @@ func (q *builderQuery[T]) Execute(ctx context.Context) (*qbtypes.Result, error)
 		return q.executeWindowList(ctx)
 	}
 
-	stmt, err := q.stmtBuilder.Build(ctx, q.fromMS, q.toMS, q.kind, q.spec, q.variables)
+	fromMS, toMS := q.fromMS, q.toMS
+	if q.spec.Signal == telemetrytypes.SignalTraces || q.spec.Signal == telemetrytypes.SignalLogs {
+		var overlap bool
+		var warning string
+		fromMS, toMS, overlap, warning = q.narrowWindowByTraceID(ctx, fromMS, toMS)
+		if !overlap {
+			res := emptyResultFor(q.kind, q.spec.Name)
+			if warning != "" {
+				res.Warnings = []string{warning}
+			}
+			return res, nil
+		}
+	}
+
+	stmt, err := q.stmtBuilder.Build(ctx, fromMS, toMS, q.kind, q.spec, q.variables)
 	if err != nil {
 		return nil, err
 	}
@@ -215,6 +231,88 @@ func (q *builderQuery[T]) Execute(ctx context.Context) (*qbtypes.Result, error)
 	return result, nil
 }
 
+// narrowWindowByTraceID inspects the filter for trace_id predicates and clamps
+// [fromMS,toMS] to the time range stored in signoz_traces.distributed_trace_summary.
+// Returns the (possibly narrowed) window, overlap=false when the trace lies
+// completely outside the query window (callers should short-circuit), and a
+// warning string the caller should attach to the empty result when the trace
+// exists but is outside the selected window.
+//
+// When the trace_id is not present in trace_summary the behaviour differs by
+// signal:
+//   - traces: trace_summary is derived from the spans table, so a missing row
+//     means no spans exist for that trace_id; we short-circuit to empty.
+//   - logs: logs can carry a trace_id even when traces are not ingested at all
+//     (e.g. traces disabled). We must not short-circuit; instead leave the
+//     window untouched and let the query run.
+func (q *builderQuery[T]) narrowWindowByTraceID(ctx context.Context, fromMS, toMS uint64) (uint64, uint64, bool, string) {
+	if q.spec.Filter == nil || q.spec.Filter.Expression == "" {
+		return fromMS, toMS, true, ""
+	}
+
+	traceIDs, found := telemetrytraces.ExtractTraceIDsFromFilter(q.spec.Filter.Expression)
+	if !found || len(traceIDs) == 0 {
+		return fromMS, toMS, true, ""
+	}
+
+	finder := telemetrytraces.NewTraceTimeRangeFinder(q.telemetryStore)
+	traceStart, traceEnd, exists, err := finder.GetTraceTimeRangeMulti(ctx, traceIDs)
+	if err != nil {
+		return fromMS, toMS, true, ""
+	}
+	if !exists {
+		if q.spec.Signal == telemetrytypes.SignalTraces {
+			q.logger.DebugContext(ctx, "trace_id not found in trace_summary; short-circuiting traces query to empty",
+				slog.Any("trace_ids", traceIDs))
+			return fromMS, toMS, false, ""
+		}
+		q.logger.DebugContext(ctx, "trace_id not found in trace_summary; leaving time range untouched for logs",
+			slog.Any("trace_ids", traceIDs))
+		return fromMS, toMS, true, ""
+	}
+
+	traceStartMS := uint64(traceStart) / 1_000_000
+	traceEndMS := uint64(traceEnd) / 1_000_000
+	if traceStartMS == 0 || traceEndMS == 0 {
+		return fromMS, toMS, true, ""
+	}
+
+	if traceStartMS > toMS || traceEndMS < fromMS {
+		traceStartUTC := time.UnixMilli(int64(traceStartMS)).UTC().Format(time.RFC3339)
+		traceEndUTC := time.UnixMilli(int64(traceEndMS)).UTC().Format(time.RFC3339)
+		return fromMS, toMS, false, fmt.Sprintf(traceOutsideRangeWarn, q.spec.Name, traceStartUTC, traceEndUTC)
+	}
+	if traceStartMS > fromMS {
+		fromMS = traceStartMS
+	}
+	if traceEndMS < toMS {
+		toMS = traceEndMS
+	}
+	q.logger.DebugContext(ctx, "optimized time range using trace_id lookup",
+		slog.String("signal", q.spec.Signal.StringValue()),
+		slog.Any("trace_ids", traceIDs),
+		slog.Uint64("start", fromMS),
+		slog.Uint64("end", toMS))
+	return fromMS, toMS, true, ""
+}
+
+// emptyResultFor returns an empty result payload appropriate for the given kind.
+func emptyResultFor(kind qbtypes.RequestType, queryName string) *qbtypes.Result {
+	var value any
+	switch kind {
+	case qbtypes.RequestTypeTimeSeries:
+		value = &qbtypes.TimeSeriesData{QueryName: queryName}
+	case qbtypes.RequestTypeScalar:
+		value = &qbtypes.ScalarData{QueryName: queryName}
+	default:
+		value = &qbtypes.RawData{QueryName: queryName}
+	}
+	return &qbtypes.Result{
+		Type:  kind,
+		Value: value,
+	}
+}
+
 // executeWithContext executes the query with query window and step context for partial value detection.
 func (q *builderQuery[T]) executeWithContext(ctx context.Context, query string, args []any) (*qbtypes.Result, error) {
 	ctx = ctxtypes.NewContextWithCommentVals(ctx, map[string]string{
@@ -310,42 +408,27 @@ func (q *builderQuery[T]) executeWindowList(ctx context.Context) (*qbtypes.Resul
 	totalBytes := uint64(0)
 	start := time.Now()
 
-	// Check if filter contains trace_id(s) and optimize time range if needed
-	if q.spec.Signal == telemetrytypes.SignalTraces &&
-		q.spec.Filter != nil && q.spec.Filter.Expression != "" {
-
-		traceIDs, found := telemetrytraces.ExtractTraceIDsFromFilter(q.spec.Filter.Expression)
-		if found && len(traceIDs) > 0 {
-			finder := telemetrytraces.NewTraceTimeRangeFinder(q.telemetryStore)
-
-			traceStart, traceEnd, ok := finder.GetTraceTimeRangeMulti(ctx, traceIDs)
-			traceStartMS := uint64(traceStart) / 1_000_000
-			traceEndMS := uint64(traceEnd) / 1_000_000
-			if !ok {
-				q.logger.DebugContext(ctx, "failed to get trace time range", slog.Any("trace_ids", traceIDs))
-			} else if traceStartMS > 0 && traceEndMS > 0 {
-				// no overlap — nothing to return
-				if uint64(traceStartMS) > toMS || uint64(traceEndMS) < fromMS {
-					return &qbtypes.Result{
-						Type: qbtypes.RequestTypeRaw,
-						Value: &qbtypes.RawData{
-							QueryName: q.spec.Name,
-						},
-						Stats: qbtypes.ExecStats{
-							DurationMS: uint64(time.Since(start).Milliseconds()),
-						},
-					}, nil
-				}
-
-				// clamp window to trace time range before bucketing
-				if uint64(traceStartMS) > fromMS {
-					fromMS = uint64(traceStartMS)
-				}
-				if uint64(traceEndMS) < toMS {
-					toMS = uint64(traceEndMS)
-				}
-				q.logger.DebugContext(ctx, "optimized time range for traces", slog.Any("trace_ids", traceIDs), slog.Uint64("start", fromMS), slog.Uint64("end", toMS))
+	// Check if filter contains trace_id(s) and optimize time range if needed.
+	// Applies to both traces (the listing this branch was built for) and logs
+	// (which carry trace_id and benefit from the same clamp before bucketing).
+	if q.spec.Signal == telemetrytypes.SignalTraces || q.spec.Signal == telemetrytypes.SignalLogs {
+		var overlap bool
+		var warning string
+		fromMS, toMS, overlap, warning = q.narrowWindowByTraceID(ctx, fromMS, toMS)
+		if !overlap {
+			res := &qbtypes.Result{
+				Type: qbtypes.RequestTypeRaw,
+				Value: &qbtypes.RawData{
+					QueryName: q.spec.Name,
+				},
+				Stats: qbtypes.ExecStats{
+					DurationMS: uint64(time.Since(start).Milliseconds()),
+				},
 			}
+			if warning != "" {
+				res.Warnings = []string{warning}
+			}
+			return res, nil
 		}
 	}
 

pkg/signoz/provider.go

@@ -208,6 +208,7 @@ func NewSQLMigrationProviderFactories(
 		sqlmigration.NewMigrateCloudIntegrationDashboardsFactory(sqlstore),
 		sqlmigration.NewAddScopeToPlannedMaintenanceFactory(sqlstore, sqlschema),
 		sqlmigration.NewMigrateInstalledIntegrationDashboardsFactory(sqlstore),
+		sqlmigration.NewAddDashboardNameFactory(sqlstore, sqlschema),
 	)
 }
 

pkg/sqlmigration/089_add_dashboard_name.go

@@ -0,0 +1,85 @@
+package sqlmigration
+
+import (
+	"context"
+
+	"github.com/SigNoz/signoz/pkg/factory"
+	"github.com/SigNoz/signoz/pkg/sqlschema"
+	"github.com/SigNoz/signoz/pkg/sqlstore"
+	"github.com/uptrace/bun"
+	"github.com/uptrace/bun/migrate"
+)
+
+type addDashboardName struct {
+	sqlstore  sqlstore.SQLStore
+	sqlschema sqlschema.SQLSchema
+}
+
+func NewAddDashboardNameFactory(sqlstore sqlstore.SQLStore, sqlschema sqlschema.SQLSchema) factory.ProviderFactory[SQLMigration, Config] {
+	return factory.NewProviderFactory(
+		factory.MustNewName("add_dashboard_name"),
+		func(ctx context.Context, ps factory.ProviderSettings, c Config) (SQLMigration, error) {
+			return &addDashboardName{sqlstore: sqlstore, sqlschema: sqlschema}, nil
+		},
+	)
+}
+
+func (migration *addDashboardName) Register(migrations *migrate.Migrations) error {
+	return migrations.Register(migration.Up, migration.Down)
+}
+
+func (migration *addDashboardName) Up(ctx context.Context, db *bun.DB) error {
+	// dashboard is referenced by public_dashboard and integration_dashboard;
+	// FK enforcement must be off for the SQLite recreate-table fallback.
+	if err := migration.sqlschema.ToggleFKEnforcement(ctx, db, false); err != nil {
+		return err
+	}
+
+	tx, err := db.BeginTx(ctx, nil)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		_ = tx.Rollback()
+	}()
+
+	table, uniqueConstraints, err := migration.sqlschema.GetTable(ctx, sqlschema.TableName("dashboard"))
+	if err != nil {
+		return err
+	}
+
+	nameColumn := &sqlschema.Column{
+		Name:     sqlschema.ColumnName("name"),
+		DataType: sqlschema.DataTypeText,
+		Nullable: false,
+	}
+
+	// Only v2 dashboards populate this column. Existing v1 rows are left with
+	// the zero value (empty string) so v1 create/update paths can keep
+	// inserting without a name.
+	//
+	// TODO: once v1 dashboards are migrated to v2 and every row has a real
+	// name, a follow-up migration should add a unique index on
+	// (org_id, name) to enforce per-org name uniqueness.
+	sqls := migration.sqlschema.Operator().AddColumn(table, uniqueConstraints, nameColumn, nil)
+
+	for _, sql := range sqls {
+		if _, err := tx.ExecContext(ctx, string(sql)); err != nil {
+			return err
+		}
+	}
+
+	if err := tx.Commit(); err != nil {
+		return err
+	}
+
+	if err := migration.sqlschema.ToggleFKEnforcement(ctx, db, true); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (migration *addDashboardName) Down(context.Context, *bun.DB) error {
+	return nil
+}

pkg/telemetrytraces/trace_time_range.go

@@ -21,19 +21,19 @@ func NewTraceTimeRangeFinder(telemetryStore telemetrystore.TelemetryStore) *Trac
 	}
 }
 
-func (f *TraceTimeRangeFinder) GetTraceTimeRange(ctx context.Context, traceID string) (startNano, endNano int64, ok bool) {
+func (f *TraceTimeRangeFinder) GetTraceTimeRange(ctx context.Context, traceID string) (startNano, endNano int64, exists bool, error error) {
 	traceIDs := []string{traceID}
 	return f.GetTraceTimeRangeMulti(ctx, traceIDs)
 }
 
-func (f *TraceTimeRangeFinder) GetTraceTimeRangeMulti(ctx context.Context, traceIDs []string) (startNano, endNano int64, ok bool) {
+func (f *TraceTimeRangeFinder) GetTraceTimeRangeMulti(ctx context.Context, traceIDs []string) (startNano, endNano int64, exists bool, error error) {
 	ctx = ctxtypes.NewContextWithCommentVals(ctx, map[string]string{
 		instrumentationtypes.TelemetrySignal:  telemetrytypes.SignalTraces.StringValue(),
 		instrumentationtypes.CodeNamespace:    "trace-time-range",
 		instrumentationtypes.CodeFunctionName: "GetTraceTimeRangeMulti",
 	})
 	if len(traceIDs) == 0 {
-		return 0, 0, false
+		return 0, 0, false, nil
 	}
 
 	cleanedIDs := make([]string, len(traceIDs))
@@ -49,7 +49,8 @@ func (f *TraceTimeRangeFinder) GetTraceTimeRangeMulti(ctx context.Context, trace
 	}
 
 	query := fmt.Sprintf(`
-		SELECT 
+		SELECT
+			count(),
 			toUnixTimestamp64Nano(min(start)),
 			toUnixTimestamp64Nano(max(end))
 		FROM %s.%s
@@ -58,9 +59,14 @@ func (f *TraceTimeRangeFinder) GetTraceTimeRangeMulti(ctx context.Context, trace
 
 	row := f.telemetryStore.ClickhouseDB().QueryRow(ctx, query, args...)
 
-	err := row.Scan(&startNano, &endNano)
+	var rowCount uint64
+	err := row.Scan(&rowCount, &startNano, &endNano)
 	if err != nil {
-		return 0, 0, false
+		return 0, 0, false, err
+	}
+
+	if rowCount == 0 {
+		return 0, 0, false, nil
 	}
 
 	if startNano > 1_000_000_000 {
@@ -68,5 +74,5 @@ func (f *TraceTimeRangeFinder) GetTraceTimeRangeMulti(ctx context.Context, trace
 	}
 	endNano += 1_000_000_000
 
-	return startNano, endNano, true
+	return startNano, endNano, true, nil
 }

pkg/telemetrytraces/trace_time_range_multi_test.go

@@ -43,7 +43,7 @@ func TestGetTraceTimeRangeMulti(t *testing.T) {
 			finder := &TraceTimeRangeFinder{telemetryStore: nil}
 
 			if !tt.expectOK {
-				_, _, ok := finder.GetTraceTimeRangeMulti(ctx, tt.traceIDs)
+				_, _, ok, _ := finder.GetTraceTimeRangeMulti(ctx, tt.traceIDs)
 				assert.False(t, ok)
 			}
 		})

pkg/types/dashboardtypes/dashboard.go

@@ -33,6 +33,7 @@ type StorableDashboard struct {
 	Locked bool                  `bun:"locked,notnull,default:false"`
 	OrgID  valuer.UUID           `bun:"org_id,notnull"`
 	Source Source                `bun:"source,type:text,notnull"`
+	Name   string                `bun:"name,type:text,notnull"`
 }
 
 type Dashboard struct {

pkg/types/spantypes/store.go

@@ -2,6 +2,7 @@ package spantypes
 
 import (
 	"context"
+	"time"
 
 	"github.com/SigNoz/signoz/pkg/valuer"
 )
@@ -26,4 +27,6 @@ type SpanMapperStore interface {
 type TraceStore interface {
 	GetTraceSummary(ctx context.Context, traceID string) (*TraceSummary, error)
 	GetTraceSpans(ctx context.Context, traceID string, summary *TraceSummary) ([]StorableSpan, error)
+	GetMinimalSpans(ctx context.Context, traceID string, start, end time.Time) ([]MinimalSpan, error)
+	GetTraceSpansByIDs(ctx context.Context, traceID string, start, end time.Time, spanIDs []string) ([]StorableSpan, error)
 }

pkg/types/spantypes/waterfall_span.go

@@ -103,12 +103,10 @@ type StorableSpan struct {
 	StartTime          time.Time          `ch:"timestamp"`
 	DurationNano       uint64             `ch:"duration_nano"`
 	SpanID             string             `ch:"span_id"`
-	TraceID            string             `ch:"trace_id"`
 	HasError           bool               `ch:"has_error"`
 	Kind               int8               `ch:"kind"`
 	ServiceName        string             `ch:"resource_string_service$$name"`
 	Name               string             `ch:"name"`
-	References         string             `ch:"references"`
 	AttributesString   map[string]string  `ch:"attributes_string"`
 	AttributesNumber   map[string]float64 `ch:"attributes_number"`
 	AttributesBool     map[string]bool    `ch:"attributes_bool"`
@@ -132,6 +130,32 @@ type StorableSpan struct {
 	ResponseStatusCode string             `ch:"response_status_code"`
 }
 
+// MinimalSpan with only the fields needed to build the parent-child tree.
+type MinimalSpan struct {
+	SpanID       string    `ch:"span_id"`
+	ParentSpanID string    `ch:"parent_span_id"`
+	StartTime    time.Time `ch:"timestamp"`
+	DurationNano uint64    `ch:"duration_nano"`
+	HasError     bool      `ch:"has_error"`
+	ServiceName  string    `ch:"resource_string_service$$name"`
+}
+
+func (item *MinimalSpan) ToWaterfallSpan(traceID string) *WaterfallSpan {
+	return &WaterfallSpan{
+		SpanID:       item.SpanID,
+		TraceID:      traceID,
+		ParentSpanID: item.ParentSpanID,
+		TimeUnix:     uint64(item.StartTime.UnixNano()),
+		DurationNano: item.DurationNano,
+		HasError:     item.HasError,
+		ServiceName:  item.ServiceName,
+		Resource:     map[string]string{"service.name": item.ServiceName},
+		Children:     make([]*WaterfallSpan, 0),
+		Attributes:   make(map[string]any),
+		Events:       make([]Event, 0),
+	}
+}
+
 // NewMissingWaterfallSpan creates a synthetic placeholder span for a parent that has no recorded data.
 func NewMissingWaterfallSpan(spanID, traceID string, timeUnixNano, durationNano uint64) *WaterfallSpan {
 	return &WaterfallSpan{
@@ -261,7 +285,7 @@ func (item *StorableSpan) UnmarshalledEvents() []Event {
 	return events
 }
 
-func (item *StorableSpan) ToWaterfallSpan() *WaterfallSpan {
+func (item *StorableSpan) ToWaterfallSpan(traceID string) *WaterfallSpan {
 	resources := make(map[string]string)
 	maps.Copy(resources, item.ResourcesString)
 
@@ -289,7 +313,7 @@ func (item *StorableSpan) ToWaterfallSpan() *WaterfallSpan {
 		StatusCode:         item.StatusCode,
 		StatusCodeString:   item.StatusCodeString,
 		StatusMessage:      item.StatusMessage,
-		TraceID:            item.TraceID,
+		TraceID:            traceID,
 		TraceState:         item.TraceState,
 		Children:           make([]*WaterfallSpan, 0),
 		TimeUnix:           uint64(item.StartTime.UnixNano()),
@@ -297,6 +321,24 @@ func (item *StorableSpan) ToWaterfallSpan() *WaterfallSpan {
 	}
 }
 
+func EnrichSelectedSpans(window []*WaterfallSpan, fullSpans []StorableSpan) {
+	fullByID := make(map[string]*StorableSpan, len(fullSpans))
+	for i := range fullSpans {
+		fullByID[fullSpans[i].SpanID] = &fullSpans[i]
+	}
+	for i, ws := range window {
+		full, ok := fullByID[ws.SpanID]
+		if !ok {
+			continue // synthesized MissingSpan — keep empty shell
+		}
+		newWS := full.ToWaterfallSpan(ws.TraceID)
+		newWS.Level = ws.Level
+		newWS.HasChildren = ws.HasChildren
+		newWS.SubTreeNodeCount = ws.SubTreeNodeCount
+		window[i] = newWS
+	}
+}
+
 // getSpanIndex returns the index of matched span and -1 for no match.
 func getSpanIndex(spans []*WaterfallSpan, targetSpanID string) int {
 	for i, s := range spans {

pkg/types/spantypes/waterfall_trace.go

@@ -62,26 +62,24 @@ func NewWaterfallTrace(
 	}
 }
 
-func NewWaterfallTraceFromSpans(spans []StorableSpan) *WaterfallTrace {
+// NewWaterfallTraceFromSpans requires WaterfallSpan nodes with only below fields:
+// SpanID, ParentSpanID, TimeUnix, DurationNano, HasError, and ServiceName.
+func NewWaterfallTraceFromSpans(nodes []*WaterfallSpan) *WaterfallTrace {
 	var (
 		startTime, endTime, totalErrorSpans uint64
-		spanIDToSpanNodeMap                 = make(map[string]*WaterfallSpan, len(spans))
+		spanIDToSpanNodeMap                 = make(map[string]*WaterfallSpan, len(nodes))
 		traceRoots                          []*WaterfallSpan
 		hasMissingSpans                     bool
 	)
 
-	for _, item := range spans {
-		span := item.ToWaterfallSpan()
-		startTimeUnixNano := uint64(item.StartTime.UnixNano())
-		if startTime == 0 || startTimeUnixNano < startTime {
-			startTime = startTimeUnixNano
+	for _, span := range nodes {
+		if startTime == 0 || span.TimeUnix < startTime {
+			startTime = span.TimeUnix
 		}
-		endTime = max(endTime, startTimeUnixNano+span.DurationNano)
-
+		endTime = max(endTime, span.TimeUnix+span.DurationNano)
 		if span.HasError {
 			totalErrorSpans++
 		}
-
 		spanIDToSpanNodeMap[span.SpanID] = span
 	}
 
@@ -116,7 +114,7 @@ func NewWaterfallTraceFromSpans(spans []StorableSpan) *WaterfallTrace {
 	return NewWaterfallTrace(
 		startTime,
 		endTime,
-		uint64(len(spans)),
+		uint64(len(nodes)),
 		totalErrorSpans,
 		spanIDToSpanNodeMap,
 		traceRoots,

tests/integration/tests/querier/01_logs.py

@@ -20,6 +20,7 @@ from fixtures.querier import (
     index_series_by_label,
     make_query_request,
 )
+from fixtures.traces import TraceIdGenerator, Traces, TracesKind, TracesStatusCode
 
 
 def test_logs_list(
@@ -2293,3 +2294,334 @@ def test_logs_formula_orderby_and_limit(
     assert len(f3_services) == 3, f"F3: expected 3 rows after limit, got {len(f3_services)}"
     assert f3_values == f4_values[:3], f"F3 values {f3_values} do not match F4[:3] values {f4_values[:3]}"
     assert set(f3_services) == set(f4_services[:3]), f"F3 services {f3_services} do not match F4[:3] services {f4_services[:3]}"
+
+
+def test_logs_list_filter_by_trace_id(
+    signoz: types.SigNoz,
+    create_user_admin: None,  # pylint: disable=unused-argument
+    get_token: Callable[[str, str], str],
+    insert_logs: Callable[[list[Logs]], None],
+    insert_traces: Callable[[list[Traces]], None],
+) -> None:
+    """
+    Tests that filtering logs by trace_id uses the trace_summary lookup to
+    narrow the query window before scanning the logs table:
+    1. Returns the matching log (narrow window, single bucket).
+    2. Does not return duplicate logs when the query window should span multiple
+       exponential buckets (>1 h). But is clamped to the timerange of trace.
+    3. Returns no results when the query window does not contain the trace.
+    4. Logs carrying a trace_id whose trace is NOT in trace_summary (e.g.
+       traces disabled) are still returned — the lookup miss must not
+       short-circuit logs queries.
+    """
+    target_trace_id = TraceIdGenerator.trace_id()
+    orphan_trace_id = TraceIdGenerator.trace_id()
+    target_root_span_id = TraceIdGenerator.span_id()
+    target_child_span_id = TraceIdGenerator.span_id()
+    orphan_span_id = TraceIdGenerator.span_id()
+
+    now = datetime.now(tz=UTC).replace(second=0, microsecond=0)
+
+    common_resources = {
+        "deployment.environment": "production",
+        "service.name": "logs-trace-filter-service",
+        "cloud.provider": "integration",
+    }
+
+    # Populate signoz_traces.distributed_trace_summary by inserting spans for
+    # the target trace_id. trace_summary records min/max of span timestamps
+    # (it ignores span duration), so two spans are inserted to give the trace
+    # a non-trivial recorded window of [now-10s, now-5s].
+    insert_traces(
+        [
+            Traces(
+                timestamp=now - timedelta(seconds=10),
+                duration=timedelta(seconds=1),
+                trace_id=target_trace_id,
+                span_id=target_root_span_id,
+                parent_span_id="",
+                name="root-span",
+                kind=TracesKind.SPAN_KIND_SERVER,
+                status_code=TracesStatusCode.STATUS_CODE_OK,
+                status_message="",
+                resources=common_resources,
+                attributes={},
+            ),
+            Traces(
+                timestamp=now - timedelta(seconds=5),
+                duration=timedelta(seconds=1),
+                trace_id=target_trace_id,
+                span_id=target_child_span_id,
+                parent_span_id=target_root_span_id,
+                name="child-span",
+                kind=TracesKind.SPAN_KIND_CLIENT,
+                status_code=TracesStatusCode.STATUS_CODE_OK,
+                status_message="",
+                resources=common_resources,
+                attributes={},
+            ),
+        ]
+    )
+
+    # Insert logs:
+    # - one with the target trace_id, at a timestamp within the trace's
+    #   recorded window (now-10s..now-5s, padded ±1s).
+    # - one with an orphan trace_id whose trace was never ingested — used to
+    #   verify the lookup miss does NOT short-circuit logs queries.
+    insert_logs(
+        [
+            Logs(
+                timestamp=now - timedelta(seconds=7),
+                resources=common_resources,
+                attributes={"http.method": "GET"},
+                body="log inside the target trace window",
+                severity_text="INFO",
+                trace_id=target_trace_id,
+                span_id=target_root_span_id,
+            ),
+            Logs(
+                timestamp=now - timedelta(seconds=2),
+                resources=common_resources,
+                attributes={"http.method": "PUT"},
+                body="log with a trace_id absent from trace_summary",
+                severity_text="INFO",
+                trace_id=orphan_trace_id,
+                span_id=orphan_span_id,
+            ),
+        ]
+    )
+
+    token = get_token(USER_ADMIN_EMAIL, USER_ADMIN_PASSWORD)
+
+    def _query(start_ms: int, end_ms: int, trace_id: str) -> tuple[list, list[str]]:
+        response = make_query_request(
+            signoz,
+            token,
+            start_ms=start_ms,
+            end_ms=end_ms,
+            request_type="raw",
+            queries=[
+                {
+                    "type": "builder_query",
+                    "spec": {
+                        "name": "A",
+                        "signal": "logs",
+                        "disabled": False,
+                        "limit": 100,
+                        "offset": 0,
+                        "filter": {"expression": f"trace_id = '{trace_id}'"},
+                        "order": [
+                            {"key": {"name": "timestamp"}, "direction": "desc"},
+                            {"key": {"name": "id"}, "direction": "desc"},
+                        ],
+                    },
+                }
+            ],
+        )
+        assert response.status_code == HTTPStatus.OK
+        assert response.json()["status"] == "success"
+        rows = response.json()["data"]["data"]["results"][0]["rows"] or []
+        warning = (response.json().get("data") or {}).get("warning") or {}
+        messages = [w.get("message", "") for w in (warning.get("warnings") or [])]
+        return rows, messages
+
+    outside_range_msg = "lies outside the selected time range"
+
+    now_ms = int(now.timestamp() * 1000)
+
+    # --- Test 1: narrow window (single bucket, <1 h) ---
+    narrow_start_ms = int((now - timedelta(minutes=5)).timestamp() * 1000)
+    narrow_rows, narrow_warnings = _query(narrow_start_ms, now_ms, target_trace_id)
+
+    assert len(narrow_rows) == 1, f"Expected 1 log for trace_id filter (narrow window), got {len(narrow_rows)}"
+    assert narrow_rows[0]["data"]["trace_id"] == target_trace_id
+    assert narrow_rows[0]["data"]["span_id"] == target_root_span_id
+    assert not any(outside_range_msg in m for m in narrow_warnings), f"Did not expect outside-range warning, got {narrow_warnings}"
+
+    # --- Test 2: wide window (>1 h, clamp to the timerange from trace_summary) ---
+    # Should still return exactly one log — no duplicates from multi-bucket scan.
+    wide_start_ms = int((now - timedelta(hours=12)).timestamp() * 1000)
+    wide_rows, wide_warnings = _query(wide_start_ms, now_ms, target_trace_id)
+
+    assert len(wide_rows) == 1, f"Expected 1 log for trace_id filter (wide window, multi-bucket), got {len(wide_rows)} — possible duplicate-log regression"
+    assert wide_rows[0]["data"]["trace_id"] == target_trace_id
+    assert wide_rows[0]["data"]["span_id"] == target_root_span_id
+    assert not any(outside_range_msg in m for m in wide_warnings), f"Did not expect outside-range warning, got {wide_warnings}"
+
+    # --- Test 3: window that does not contain the trace returns no results + warning ---
+    past_start_ms = int((now - timedelta(hours=6)).timestamp() * 1000)
+    past_end_ms = int((now - timedelta(hours=2)).timestamp() * 1000)
+    past_rows, past_warnings = _query(past_start_ms, past_end_ms, target_trace_id)
+
+    assert len(past_rows) == 0, f"Expected 0 logs for trace_id filter outside time window, got {len(past_rows)}"
+    assert any(outside_range_msg in m for m in past_warnings), f"Expected outside-range warning, got warnings={past_warnings}"
+
+    # --- Test 4: trace_id not present in trace_summary still returns logs (no warning) ---
+    orphan_rows, orphan_warnings = _query(narrow_start_ms, now_ms, orphan_trace_id)
+
+    assert len(orphan_rows) == 1, f"Expected 1 log for orphan trace_id (no trace_summary entry), got {len(orphan_rows)} — logs query may have been incorrectly short-circuited"
+    assert orphan_rows[0]["data"]["trace_id"] == orphan_trace_id
+    assert not any(outside_range_msg in m for m in orphan_warnings), f"Did not expect outside-range warning for orphan trace_id, got {orphan_warnings}"
+
+
+def test_logs_aggregation_filter_by_trace_id(
+    signoz: types.SigNoz,
+    create_user_admin: None,  # pylint: disable=unused-argument
+    get_token: Callable[[str, str], str],
+    insert_logs: Callable[[list[Logs]], None],
+    insert_traces: Callable[[list[Traces]], None],
+) -> None:
+    """
+    Tests that the trace_id time-range optimization also applies to
+    non-window-list (time_series / aggregation) logs queries:
+    1. Wide query window containing the trace returns the correct count.
+    2. Query window outside the trace's time range short-circuits to an
+       empty result.
+    3. A trace_id with no row in trace_summary (e.g. traces disabled) still
+       returns the matching logs — the lookup miss must not short-circuit
+       logs aggregation queries.
+    """
+    target_trace_id = TraceIdGenerator.trace_id()
+    orphan_trace_id = TraceIdGenerator.trace_id()
+    target_root_span_id = TraceIdGenerator.span_id()
+    target_child_span_id = TraceIdGenerator.span_id()
+    orphan_span_id = TraceIdGenerator.span_id()
+
+    now = datetime.now(tz=UTC).replace(second=0, microsecond=0)
+
+    common_resources = {
+        "deployment.environment": "production",
+        "service.name": "logs-trace-agg-service",
+        "cloud.provider": "integration",
+    }
+
+    # trace_summary records min/max of span timestamps (it ignores duration),
+    # so insert two spans to give the trace a recorded window wide enough to
+    # comfortably contain the log timestamps below.
+    insert_traces(
+        [
+            Traces(
+                timestamp=now - timedelta(seconds=10),
+                duration=timedelta(seconds=1),
+                trace_id=target_trace_id,
+                span_id=target_root_span_id,
+                parent_span_id="",
+                name="root-span",
+                kind=TracesKind.SPAN_KIND_SERVER,
+                status_code=TracesStatusCode.STATUS_CODE_OK,
+                status_message="",
+                resources=common_resources,
+                attributes={},
+            ),
+            Traces(
+                timestamp=now - timedelta(seconds=5),
+                duration=timedelta(seconds=1),
+                trace_id=target_trace_id,
+                span_id=target_child_span_id,
+                parent_span_id=target_root_span_id,
+                name="child-span",
+                kind=TracesKind.SPAN_KIND_CLIENT,
+                status_code=TracesStatusCode.STATUS_CODE_OK,
+                status_message="",
+                resources=common_resources,
+                attributes={},
+            ),
+        ]
+    )
+
+    # Two logs for the target trace_id, both inside the recorded trace window.
+    # One additional log carries an orphan trace_id with no row in
+    # trace_summary — used to verify that the lookup miss does not
+    # short-circuit logs aggregations.
+    insert_logs(
+        [
+            Logs(
+                timestamp=now - timedelta(seconds=7),
+                resources=common_resources,
+                attributes={},
+                body="log A inside trace window",
+                severity_text="INFO",
+                trace_id=target_trace_id,
+                span_id=target_root_span_id,
+            ),
+            Logs(
+                timestamp=now - timedelta(seconds=6),
+                resources=common_resources,
+                attributes={},
+                body="log B inside trace window",
+                severity_text="INFO",
+                trace_id=target_trace_id,
+                span_id=target_root_span_id,
+            ),
+            Logs(
+                timestamp=now - timedelta(seconds=2),
+                resources=common_resources,
+                attributes={},
+                body="log with a trace_id absent from trace_summary",
+                severity_text="INFO",
+                trace_id=orphan_trace_id,
+                span_id=orphan_span_id,
+            ),
+        ]
+    )
+
+    token = get_token(USER_ADMIN_EMAIL, USER_ADMIN_PASSWORD)
+
+    def _count(start_ms: int, end_ms: int, trace_id: str) -> tuple[float, list[str]]:
+        response = make_query_request(
+            signoz,
+            token,
+            start_ms=start_ms,
+            end_ms=end_ms,
+            request_type="time_series",
+            queries=[
+                {
+                    "type": "builder_query",
+                    "spec": {
+                        "name": "A",
+                        "signal": "logs",
+                        "stepInterval": 60,
+                        "disabled": False,
+                        "filter": {"expression": f"trace_id = '{trace_id}'"},
+                        "having": {"expression": ""},
+                        "aggregations": [{"expression": "count()"}],
+                    },
+                }
+            ],
+        )
+        assert response.status_code == HTTPStatus.OK
+        assert response.json()["status"] == "success"
+        results = response.json()["data"]["data"]["results"]
+        assert len(results) == 1
+        warning = (response.json().get("data") or {}).get("warning") or {}
+        messages = [w.get("message", "") for w in (warning.get("warnings") or [])]
+        aggregations = results[0].get("aggregations") or []
+        if not aggregations:
+            return 0, messages
+        series = aggregations[0].get("series") or []
+        if not series:
+            return 0, messages
+        return sum(v["value"] for v in series[0]["values"]), messages
+
+    outside_range_msg = "lies outside the selected time range"
+
+    now_ms = int(now.timestamp() * 1000)
+    narrow_start_ms = int((now - timedelta(minutes=5)).timestamp() * 1000)
+
+    # --- Test 1: wide window (>1 h) containing the trace returns 2 logs ---
+    wide_start_ms = int((now - timedelta(hours=12)).timestamp() * 1000)
+    wide_count, wide_warnings = _count(wide_start_ms, now_ms, target_trace_id)
+    assert wide_count == 2, f"Expected count=2 for trace_id aggregation (wide window), got {wide_count}"
+    assert not any(outside_range_msg in m for m in wide_warnings), f"Did not expect outside-range warning, got {wide_warnings}"
+
+    # --- Test 2: window outside the trace short-circuits to empty + warning ---
+    past_start_ms = int((now - timedelta(hours=6)).timestamp() * 1000)
+    past_end_ms = int((now - timedelta(hours=2)).timestamp() * 1000)
+    past_count, past_warnings = _count(past_start_ms, past_end_ms, target_trace_id)
+    assert past_count == 0, f"Expected count=0 for trace_id aggregation outside time window, got {past_count}"
+    assert any(outside_range_msg in m for m in past_warnings), f"Expected outside-range warning, got warnings={past_warnings}"
+
+    # --- Test 3: trace_id not present in trace_summary still returns logs (no warning) ---
+    orphan_count, orphan_warnings = _count(narrow_start_ms, now_ms, orphan_trace_id)
+    assert orphan_count == 1, f"Expected count=1 for orphan trace_id aggregation, got {orphan_count} — query may have been incorrectly short-circuited"
+    assert not any(outside_range_msg in m for m in orphan_warnings), f"Did not expect outside-range warning for orphan trace_id, got {orphan_warnings}"

tests/integration/tests/querier/04_traces.py

@@ -2062,7 +2062,7 @@ def test_traces_list_filter_by_trace_id(
 
     trace_filter = f"trace_id = '{target_trace_id}'"
 
-    def _query(start_ms: int, end_ms: int) -> list:
+    def _query(start_ms: int, end_ms: int) -> tuple[list, list[str]]:
         response = make_query_request(
             signoz,
             token,
@@ -2096,30 +2096,157 @@ def test_traces_list_filter_by_trace_id(
         )
         assert response.status_code == HTTPStatus.OK
         assert response.json()["status"] == "success"
-        return response.json()["data"]["data"]["results"][0]["rows"] or []
+        rows = response.json()["data"]["data"]["results"][0]["rows"] or []
+        warning = (response.json().get("data") or {}).get("warning") or {}
+        messages = [w.get("message", "") for w in (warning.get("warnings") or [])]
+        return rows, messages
+
+    outside_range_msg = "lies outside the selected time range"
 
     now_ms = int(now.timestamp() * 1000)
 
     # --- Test 1: narrow window (single bucket, <1 h) ---
     narrow_start_ms = int((now - timedelta(minutes=5)).timestamp() * 1000)
-    narrow_rows = _query(narrow_start_ms, now_ms)
+    narrow_rows, narrow_warnings = _query(narrow_start_ms, now_ms)
 
     assert len(narrow_rows) == 1, f"Expected 1 span for trace_id filter (narrow window), got {len(narrow_rows)}"
     assert narrow_rows[0]["data"]["span_id"] == span_id_root
     assert narrow_rows[0]["data"]["trace_id"] == target_trace_id
+    assert not any(outside_range_msg in m for m in narrow_warnings), f"Did not expect outside-range warning, got {narrow_warnings}"
 
     # --- Test 2: wide window (>1 h, triggers multiple exponential buckets) ---
     # should just return 1 span, not duplicate
     wide_start_ms = int((now - timedelta(hours=12)).timestamp() * 1000)
-    wide_rows = _query(wide_start_ms, now_ms)
+    wide_rows, wide_warnings = _query(wide_start_ms, now_ms)
 
     assert len(wide_rows) == 1, f"Expected 1 span for trace_id filter (wide window, multi-bucket), got {len(wide_rows)} — possible duplicate-span regression"
     assert wide_rows[0]["data"]["span_id"] == span_id_root
     assert wide_rows[0]["data"]["trace_id"] == target_trace_id
+    assert not any(outside_range_msg in m for m in wide_warnings), f"Did not expect outside-range warning, got {wide_warnings}"
 
-    # --- Test 3: window that does not contain the trace returns no results ---
+    # --- Test 3: window that does not contain the trace returns no results + warning ---
     past_start_ms = int((now - timedelta(hours=6)).timestamp() * 1000)
     past_end_ms = int((now - timedelta(hours=2)).timestamp() * 1000)
-    past_rows = _query(past_start_ms, past_end_ms)
+    past_rows, past_warnings = _query(past_start_ms, past_end_ms)
 
     assert len(past_rows) == 0, f"Expected 0 spans for trace_id filter outside time window, got {len(past_rows)}"
+    assert any(outside_range_msg in m for m in past_warnings), f"Expected outside-range warning, got warnings={past_warnings}"
+
+
+def test_traces_aggregation_filter_by_trace_id(
+    signoz: types.SigNoz,
+    create_user_admin: None,  # pylint: disable=unused-argument
+    get_token: Callable[[str, str], str],
+    insert_traces: Callable[[list[Traces]], None],
+) -> None:
+    """
+    Tests that the trace_id time-range optimization also applies to
+    non-window-list (time_series / aggregation) traces queries:
+    1. Wide query window containing the trace returns the correct count.
+    2. Query window outside the trace's time range short-circuits to empty.
+    3. Filter referencing a trace_id with no row in trace_summary
+       short-circuits to empty (trace_summary is authoritative for traces).
+    """
+    target_trace_id = TraceIdGenerator.trace_id()
+    target_root_span_id = TraceIdGenerator.span_id()
+    target_child_span_id = TraceIdGenerator.span_id()
+    missing_trace_id = TraceIdGenerator.trace_id()
+
+    now = datetime.now(tz=UTC).replace(second=0, microsecond=0)
+
+    common_resources = {
+        "deployment.environment": "production",
+        "service.name": "traces-agg-filter-service",
+        "cloud.provider": "integration",
+    }
+
+    insert_traces(
+        [
+            Traces(
+                timestamp=now - timedelta(seconds=10),
+                duration=timedelta(seconds=5),
+                trace_id=target_trace_id,
+                span_id=target_root_span_id,
+                parent_span_id="",
+                name="root-span",
+                kind=TracesKind.SPAN_KIND_SERVER,
+                status_code=TracesStatusCode.STATUS_CODE_OK,
+                status_message="",
+                resources=common_resources,
+                attributes={"http.request.method": "GET"},
+            ),
+            Traces(
+                timestamp=now - timedelta(seconds=9),
+                duration=timedelta(seconds=1),
+                trace_id=target_trace_id,
+                span_id=target_child_span_id,
+                parent_span_id=target_root_span_id,
+                name="child-span",
+                kind=TracesKind.SPAN_KIND_CLIENT,
+                status_code=TracesStatusCode.STATUS_CODE_OK,
+                status_message="",
+                resources=common_resources,
+                attributes={},
+            ),
+        ]
+    )
+
+    token = get_token(USER_ADMIN_EMAIL, USER_ADMIN_PASSWORD)
+
+    def _count(start_ms: int, end_ms: int, trace_id: str) -> tuple[float, list[str]]:
+        response = make_query_request(
+            signoz,
+            token,
+            start_ms=start_ms,
+            end_ms=end_ms,
+            request_type="time_series",
+            queries=[
+                {
+                    "type": "builder_query",
+                    "spec": {
+                        "name": "A",
+                        "signal": "traces",
+                        "stepInterval": 60,
+                        "disabled": False,
+                        "filter": {"expression": f"trace_id = '{trace_id}'"},
+                        "aggregations": [{"expression": "count()"}],
+                    },
+                }
+            ],
+        )
+        assert response.status_code == HTTPStatus.OK
+        assert response.json()["status"] == "success"
+        results = response.json()["data"]["data"]["results"]
+        assert len(results) == 1
+        warning = (response.json().get("data") or {}).get("warning") or {}
+        messages = [w.get("message", "") for w in (warning.get("warnings") or [])]
+        aggregations = results[0].get("aggregations") or []
+        if not aggregations:
+            return 0, messages
+        series = aggregations[0].get("series") or []
+        if not series:
+            return 0, messages
+        return sum(v["value"] for v in series[0]["values"]), messages
+
+    outside_range_msg = "lies outside the selected time range"
+
+    now_ms = int(now.timestamp() * 1000)
+
+    # --- Test 1: wide window (>1 h) containing the trace returns both spans ---
+    wide_start_ms = int((now - timedelta(hours=12)).timestamp() * 1000)
+    wide_count, wide_warnings = _count(wide_start_ms, now_ms, target_trace_id)
+    assert wide_count == 2, f"Expected count=2 for trace_id aggregation (wide window), got {wide_count}"
+    assert not any(outside_range_msg in m for m in wide_warnings), f"Did not expect outside-range warning, got {wide_warnings}"
+
+    # --- Test 2: window outside the trace short-circuits to empty + warning ---
+    past_start_ms = int((now - timedelta(hours=6)).timestamp() * 1000)
+    past_end_ms = int((now - timedelta(hours=2)).timestamp() * 1000)
+    past_count, past_warnings = _count(past_start_ms, past_end_ms, target_trace_id)
+    assert past_count == 0, f"Expected count=0 for trace_id aggregation outside time window, got {past_count}"
+    assert any(outside_range_msg in m for m in past_warnings), f"Expected outside-range warning, got warnings={past_warnings}"
+
+    # --- Test 3: trace_id with no entry in trace_summary short-circuits (no warning) ---
+    missing_start_ms = int((now - timedelta(minutes=5)).timestamp() * 1000)
+    missing_count, missing_warnings = _count(missing_start_ms, now_ms, missing_trace_id)
+    assert missing_count == 0, f"Expected count=0 for trace_id absent from trace_summary, got {missing_count}"
+    assert not any(outside_range_msg in m for m in missing_warnings), f"Did not expect outside-range warning for missing trace_id, got {missing_warnings}"