chore(deps): bump github.com/jackc/pgx/v5 from 5.8.0 to 5.9.2

Bumps [github.com/jackc/pgx/v5](https://github.com/jackc/pgx) from 5.8.0 to 5.9.2.
- [Changelog](https://github.com/jackc/pgx/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jackc/pgx/compare/v5.8.0...v5.9.2)

---
updated-dependencies:
- dependency-name: github.com/jackc/pgx/v5
  dependency-version: 5.9.2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

ee/zeus/httpzeus/provider.go

@@ -7,6 +7,7 @@ import (
 	"io"
 	"net/http"
 	"net/url"
+	"time"
 
 	"github.com/SigNoz/signoz/pkg/errors"
 	"github.com/SigNoz/signoz/pkg/factory"
@@ -37,6 +38,7 @@ func New(ctx context.Context, providerSettings factory.ProviderSettings, config
 		providerSettings.MeterProvider,
 		client.WithRequestResponseLog(true),
 		client.WithRetryCount(3),
+		client.WithTimeout(30*time.Second),
 	)
 	if err != nil {
 		return nil, err

frontend/package.json

@@ -52,7 +52,7 @@
     "@signozhq/design-tokens": "2.1.4",
     "@signozhq/icons": "0.1.0",
     "@signozhq/resizable": "0.0.2",
-    "@signozhq/ui": "0.0.9",
+    "@signozhq/ui": "0.0.10",
     "@tanstack/react-table": "8.21.3",
     "@tanstack/react-virtual": "3.13.22",
     "@uiw/codemirror-theme-copilot": "4.23.11",
@@ -266,4 +266,4 @@
     "tmp": "0.2.4",
     "vite": "npm:rolldown-vite@7.3.1"
   }
-}
+}

frontend/src/container/DashboardContainer/visualization/charts/BarChart/BarChart.tsx

@@ -37,6 +37,7 @@ export default function BarChart(props: BarChartProps): JSX.Element {
 				yAxisUnit: rest.yAxisUnit,
 				decimalPrecision: rest.decimalPrecision,
 				isStackedBarChart: isStackedBarChart,
+				canPinTooltip: rest.canPinTooltip,
 			};
 			return <BarChartTooltip {...tooltipProps} />;
 		},
@@ -46,6 +47,7 @@ export default function BarChart(props: BarChartProps): JSX.Element {
 			rest.yAxisUnit,
 			rest.decimalPrecision,
 			isStackedBarChart,
+			rest.canPinTooltip,
 		],
 	);
 

frontend/src/container/DashboardContainer/visualization/charts/ChartWrapper/ChartWrapper.tsx

@@ -25,6 +25,8 @@ export default function ChartWrapper({
 	showTooltip = true,
 	showLegend = true,
 	canPinTooltip = false,
+	pinKey,
+	onClick,
 	syncMode,
 	syncKey,
 	onDestroy = noop,
@@ -101,6 +103,8 @@ export default function ChartWrapper({
 							<TooltipPlugin
 								config={config}
 								canPinTooltip={canPinTooltip}
+								pinKey={pinKey}
+								onClick={onClick}
 								syncMode={syncMode}
 								maxWidth={Math.max(
 									TOOLTIP_MIN_WIDTH,

frontend/src/container/DashboardContainer/visualization/charts/Histogram/Histogram.tsx

@@ -26,10 +26,11 @@ export default function Histogram(props: HistogramChartProps): JSX.Element {
 				...props,
 				yAxisUnit: rest.yAxisUnit,
 				decimalPrecision: rest.decimalPrecision,
+				canPinTooltip: rest.canPinTooltip,
 			};
 			return <HistogramTooltip {...tooltipProps} />;
 		},
-		[customTooltip, rest.yAxisUnit, rest.decimalPrecision],
+		[customTooltip, rest.yAxisUnit, rest.decimalPrecision, rest.canPinTooltip],
 	);
 
 	return (

frontend/src/container/DashboardContainer/visualization/charts/TimeSeries/TimeSeries.tsx

@@ -21,10 +21,17 @@ export default function TimeSeries(props: TimeSeriesChartProps): JSX.Element {
 				timezone: rest.timezone,
 				yAxisUnit: rest.yAxisUnit,
 				decimalPrecision: rest.decimalPrecision,
+				canPinTooltip: rest.canPinTooltip,
 			};
 			return <TimeSeriesTooltip {...tooltipProps} />;
 		},
-		[customTooltip, rest.timezone, rest.yAxisUnit, rest.decimalPrecision],
+		[
+			customTooltip,
+			rest.timezone,
+			rest.yAxisUnit,
+			rest.decimalPrecision,
+			rest.canPinTooltip,
+		],
 	);
 
 	return (

frontend/src/container/DashboardContainer/visualization/charts/types.ts

@@ -13,6 +13,12 @@ interface BaseChartProps {
 	showTooltip?: boolean;
 	showLegend?: boolean;
 	canPinTooltip?: boolean;
+	/** Key that pins the tooltip while hovering. Defaults to DEFAULT_PIN_TOOLTIP_KEY ('l'). */
+	pinKey?: string;
+	/** Called when the user clicks the uPlot overlay. Receives resolved click data. */
+	onClick?: (clickData: TooltipClickData) => void;
+	yAxisUnit?: string;
+	decimalPrecision?: PrecisionOption;
 	pinnedTooltipElement?: (clickData: TooltipClickData) => React.ReactNode;
 	customTooltip?: (props: TooltipRenderArgs) => React.ReactNode;
 	'data-testid'?: string;

frontend/src/container/DashboardContainer/visualization/panels/BarPanel/BarPanel.tsx

@@ -121,6 +121,7 @@ function BarPanel(props: PanelWrapperProps): JSX.Element {
 					legendConfig={{
 						position: widget?.legendPosition ?? LegendPosition.BOTTOM,
 					}}
+					canPinTooltip
 					plotRef={onPlotRef}
 					onDestroy={onPlotDestroy}
 					data={chartData as uPlot.AlignedData}

frontend/src/container/DashboardContainer/visualization/panels/HistogramPanel/HistogramPanel.tsx

@@ -89,6 +89,7 @@ function HistogramPanel(props: PanelWrapperProps): JSX.Element {
 					onDestroy={(): void => {
 						uPlotRef.current = null;
 					}}
+					canPinTooltip
 					yAxisUnit={widget.yAxisUnit}
 					decimalPrecision={widget.decimalPrecision}
 					isQueriesMerged={widget.mergeAllActiveQueries}

frontend/src/container/DashboardContainer/visualization/panels/TimeSeriesPanel/TimeSeriesPanel.tsx

@@ -112,6 +112,7 @@ function TimeSeriesPanel(props: PanelWrapperProps): JSX.Element {
 					legendConfig={{
 						position: widget?.legendPosition ?? LegendPosition.BOTTOM,
 					}}
+					canPinTooltip
 					timezone={timezone}
 					yAxisUnit={widget.yAxisUnit}
 					decimalPrecision={widget.decimalPrecision}

frontend/src/lib/uPlotV2/components/Tooltip/Tooltip.module.scss

@@ -1,73 +1,22 @@
-.uplot-tooltip-container {
+.container {
 	font-family: 'Inter';
 	font-size: 12px;
-	background: var(--bg-ink-300);
+	background: var(--l2-background);
 	-webkit-font-smoothing: antialiased;
-	color: var(--bg-vanilla-100);
+	color: var(--l2-foreground);
 	border-radius: 6px;
-	border: 1px solid var(--bg-ink-100);
+	border: 1px solid var(--l2-border);
 	display: flex;
 	flex-direction: column;
 	gap: 8px;
 
-	&.lightMode {
-		background: var(--bg-vanilla-100);
-		color: var(--bg-ink-500);
-		border: 1px solid var(--bg-vanilla-300);
-
-		.uplot-tooltip-list {
-			&::-webkit-scrollbar-thumb {
-				background: var(--bg-vanilla-400);
-			}
-		}
-
-		.uplot-tooltip-divider {
-			background-color: var(--bg-vanilla-300);
-		}
+	&.pinned {
+		border-color: var(--ring);
 	}
 
-	.uplot-tooltip-header-container {
-		padding: 1rem 1rem 0 1rem;
-		display: flex;
-		flex-direction: column;
-		gap: 8px;
-
-		&:last-child {
-			padding-bottom: 1rem;
-		}
-
-		.uplot-tooltip-header {
-			font-size: 13px;
-			font-weight: 500;
-		}
-	}
-
-	.uplot-tooltip-divider {
+	.divider {
 		width: 100%;
 		height: 1px;
-		background-color: var(--bg-ink-100);
-	}
-
-	.uplot-tooltip-list {
-		// Virtuoso absolutely positions its item rows; left: 0 prevents accidental
-		// horizontal offset when the scroller has padding or transform applied.
-		div[data-viewport-type='element'] {
-			left: 0;
-			box-sizing: border-box;
-			padding: 4px 12px 4px 16px;
-		}
-
-		&::-webkit-scrollbar {
-			width: 0.3rem;
-		}
-
-		&::-webkit-scrollbar-track {
-			background: transparent;
-		}
-
-		&::-webkit-scrollbar-thumb {
-			background: var(--bg-slate-100);
-			border-radius: 0.5rem;
-		}
+		background-color: var(--l2-border);
 	}
 }

frontend/src/lib/uPlotV2/components/Tooltip/Tooltip.tsx

@@ -1,71 +1,28 @@
-import { useMemo, useState } from 'react';
-import { Virtuoso } from 'react-virtuoso';
+import { useMemo } from 'react';
 import cx from 'classnames';
-import { DATE_TIME_FORMATS } from 'constants/dateTimeFormats';
-import dayjs from 'dayjs';
-import { useIsDarkMode } from 'hooks/useDarkMode';
-import { useTimezone } from 'providers/Timezone';
 
 import { TooltipProps } from '../types';
-import TooltipItem from './components/TooltipItem/TooltipItem';
+import TooltipFooter from './components/TooltipFooter/TooltipFooter';
+import TooltipHeader from './components/TooltipHeader/TooltipHeader';
+import TooltipList from './components/TooltipList/TooltipList';
 
 import Styles from './Tooltip.module.scss';
 
-// Fallback per-item height used for the initial size estimate before
-// Virtuoso reports the real total height via totalListHeightChanged.
-const TOOLTIP_ITEM_HEIGHT = 38;
-const LIST_MAX_HEIGHT = 300;
-
 export default function Tooltip({
 	uPlotInstance,
 	timezone,
 	content,
 	showTooltipHeader = true,
+	isPinned,
+	canPinTooltip,
+	dismiss,
 }: TooltipProps): JSX.Element {
-	const isDarkMode = useIsDarkMode();
-	const { timezone: userTimezone } = useTimezone();
-	const [totalListHeight, setTotalListHeight] = useState(0);
-
 	const tooltipContent = useMemo(() => content ?? [], [content]);
-
-	const resolvedTimezone = timezone?.value ?? userTimezone.value;
-
-	const headerTitle = useMemo(() => {
-		if (!showTooltipHeader) {
-			return null;
-		}
-		const cursorIdx = uPlotInstance.cursor.idx;
-		if (cursorIdx == null) {
-			return null;
-		}
-		const timestamp = uPlotInstance.data[0]?.[cursorIdx];
-		if (timestamp == null) {
-			return null;
-		}
-		return dayjs(timestamp * 1000)
-			.tz(resolvedTimezone)
-			.format(DATE_TIME_FORMATS.MONTH_DATETIME_SECONDS);
-	}, [
-		resolvedTimezone,
-		uPlotInstance.data,
-		uPlotInstance.cursor.idx,
-		showTooltipHeader,
-	]);
-
 	const activeItem = useMemo(
 		() => tooltipContent.find((item) => item.isActive) ?? null,
 		[tooltipContent],
 	);
 
-	// Use the measured height from Virtuoso when available; fall back to a
-	// per-item estimate on the first render.  Math.ceil prevents a 1 px
-	// subpixel rounding gap from triggering a spurious scrollbar.
-	const virtuosoHeight = useMemo(() => {
-		return totalListHeight > 0
-			? Math.ceil(Math.min(totalListHeight, LIST_MAX_HEIGHT))
-			: Math.min(tooltipContent.length * TOOLTIP_ITEM_HEIGHT, LIST_MAX_HEIGHT);
-	}, [totalListHeight, tooltipContent.length]);
-
 	const showHeader = showTooltipHeader || activeItem != null;
 	// With a single series the active item is fully represented in the header —
 	// hide the divider and list to avoid showing a duplicate row.
@@ -74,46 +31,24 @@ export default function Tooltip({
 
 	return (
 		<div
-			className={cx(Styles.uplotTooltipContainer, !isDarkMode && Styles.lightMode)}
+			className={cx(Styles.container, isPinned && Styles.pinned)}
 			data-testid="uplot-tooltip-container"
 		>
 			{showHeader && (
-				<div className={Styles.uplotTooltipHeaderContainer}>
-					{showTooltipHeader && headerTitle && (
-						<div
-							className={Styles.uplotTooltipHeader}
-							data-testid="uplot-tooltip-header"
-						>
-							<span>{headerTitle}</span>
-						</div>
-					)}
-
-					{activeItem && (
-						<TooltipItem
-							item={activeItem}
-							isItemActive={true}
-							containerTestId="uplot-tooltip-pinned"
-							markerTestId="uplot-tooltip-pinned-marker"
-							contentTestId="uplot-tooltip-pinned-content"
-						/>
-					)}
-				</div>
-			)}
-
-			{showDivider && <span className={Styles.uplotTooltipDivider} />}
-
-			{showList && (
-				<Virtuoso
-					className={Styles.uplotTooltipList}
-					data-testid="uplot-tooltip-list"
-					data={tooltipContent}
-					style={{ height: virtuosoHeight, width: '100%' }}
-					totalListHeightChanged={setTotalListHeight}
-					itemContent={(_, item): JSX.Element => (
-						<TooltipItem item={item} isItemActive={false} />
-					)}
+				<TooltipHeader
+					uPlotInstance={uPlotInstance}
+					timezone={timezone}
+					showTooltipHeader={showTooltipHeader}
+					isPinned={isPinned}
+					activeItem={activeItem}
 				/>
 			)}
+
+			{showDivider && <span className={Styles.divider} />}
+
+			{showList && <TooltipList content={tooltipContent} />}
+
+			{canPinTooltip && <TooltipFooter isPinned={isPinned} dismiss={dismiss} />}
 		</div>
 	);
 }

frontend/src/lib/uPlotV2/components/Tooltip/__tests__/Tooltip.test.tsx

@@ -1,5 +1,6 @@
 import React from 'react';
 import { VirtuosoMockContext } from 'react-virtuoso';
+import userEvent from '@testing-library/user-event';
 import { DATE_TIME_FORMATS } from 'constants/dateTimeFormats';
 import dayjs from 'dayjs';
 import { useIsDarkMode } from 'hooks/useDarkMode';
@@ -92,7 +93,6 @@ function renderTooltip(props: Partial<TooltipTestProps> = {}): RenderResult {
 		isPinned: false,
 		dismiss: jest.fn(),
 		viaSync: false,
-		clickData: null,
 	} as TooltipTestProps;
 
 	return render(
@@ -191,3 +191,85 @@ describe('Tooltip', () => {
 		expect(list).toHaveStyle({ height: '76px' });
 	});
 });
+
+describe('Tooltip footer hint', () => {
+	beforeEach(() => {
+		jest.clearAllMocks();
+		mockUseIsDarkMode.mockReturnValue(false);
+	});
+
+	it('renders footer with "Press P to pin the tooltip" hint when not pinned', () => {
+		renderTooltip({ isPinned: false, canPinTooltip: true });
+
+		const footer = screen.getByTestId('uplot-tooltip-footer');
+		expect(footer).toBeInTheDocument();
+		expect(footer).toHaveTextContent('Press');
+		expect(footer).toHaveTextContent('P');
+		expect(footer).toHaveTextContent('to pin the tooltip');
+	});
+
+	it('renders footer with "Press P or Esc to unpin" hint when pinned', () => {
+		renderTooltip({ isPinned: true, canPinTooltip: true });
+
+		const footer = screen.getByTestId('uplot-tooltip-footer');
+		expect(footer).toHaveTextContent('Press');
+		expect(footer).toHaveTextContent('P');
+		expect(footer).toHaveTextContent('Esc');
+		expect(footer).toHaveTextContent('to unpin');
+	});
+
+	it('does not render Unpin button when not pinned', () => {
+		renderTooltip({ isPinned: false, canPinTooltip: true });
+
+		expect(screen.queryByTestId('uplot-tooltip-unpin')).not.toBeInTheDocument();
+	});
+
+	it('renders Unpin button when pinned', () => {
+		renderTooltip({ isPinned: true, canPinTooltip: true });
+
+		const unpinBtn = screen.getByTestId('uplot-tooltip-unpin');
+		expect(unpinBtn).toBeInTheDocument();
+		expect(unpinBtn).toHaveAttribute('aria-label', 'Unpin tooltip');
+	});
+
+	it('calls dismiss when Unpin button is clicked', async () => {
+		const dismiss = jest.fn();
+		renderTooltip({ isPinned: true, canPinTooltip: true, dismiss });
+
+		const user = userEvent.setup();
+		const unpinBtn = screen.getByTestId('uplot-tooltip-unpin');
+		await user.click(unpinBtn);
+
+		expect(dismiss).toHaveBeenCalledTimes(1);
+	});
+
+	it('footer has role="status" for screen reader announcements', () => {
+		renderTooltip({ canPinTooltip: true });
+
+		const footer = screen.getByRole('status');
+		expect(footer).toBeInTheDocument();
+	});
+});
+
+describe('Tooltip header status pill', () => {
+	beforeEach(() => {
+		jest.clearAllMocks();
+		mockUseIsDarkMode.mockReturnValue(false);
+	});
+
+	it('shows Pinned status when pinned and header is visible', () => {
+		const uPlotInstance = createUPlotInstance(0);
+
+		renderTooltip({ uPlotInstance, isPinned: true });
+
+		expect(screen.getByText('Pinned')).toBeInTheDocument();
+	});
+
+	it('does not render status pill when showTooltipHeader is false', () => {
+		const uPlotInstance = createUPlotInstance(0);
+
+		renderTooltip({ uPlotInstance, showTooltipHeader: false, isPinned: false });
+
+		expect(screen.queryByTestId('uplot-tooltip-status')).not.toBeInTheDocument();
+	});
+});

frontend/src/lib/uPlotV2/components/Tooltip/components/TooltipFooter/TooltipFooter.module.scss

@@ -0,0 +1,18 @@
+.footer {
+	display: flex;
+	align-items: center;
+	justify-content: space-between;
+	gap: 10px;
+	padding: 7px 12px;
+	border-top: 1px solid var(--l2-border);
+	background: var(--l2-background);
+	border-radius: 0 0 6px 6px;
+}
+
+.hint {
+	display: flex;
+	align-items: center;
+	gap: 5px;
+	font-size: 11px;
+	color: var(--l2-foreground);
+}

frontend/src/lib/uPlotV2/components/Tooltip/components/TooltipFooter/TooltipFooter.tsx

@@ -0,0 +1,58 @@
+import { Button } from '@signozhq/ui';
+import { Kbd } from '@signozhq/ui';
+import { DEFAULT_PIN_TOOLTIP_KEY } from 'lib/uPlotV2/plugins/TooltipPlugin/types';
+import { X } from 'lucide-react';
+
+import Styles from './TooltipFooter.module.scss';
+
+interface TooltipFooterProps {
+	pinKey?: string;
+	isPinned: boolean;
+	dismiss: () => void;
+}
+
+export default function TooltipFooter({
+	pinKey = DEFAULT_PIN_TOOLTIP_KEY,
+	isPinned,
+	dismiss,
+}: TooltipFooterProps): JSX.Element {
+	return (
+		<div
+			className={Styles.footer}
+			role="status"
+			data-testid="uplot-tooltip-footer"
+		>
+			<div className={Styles.hint}>
+				{isPinned ? (
+					<>
+						<span>Press</span>
+						<Kbd active>{pinKey.toUpperCase()}</Kbd>
+						<span>or</span>
+						<Kbd active>Esc</Kbd>
+						<span>to unpin</span>
+					</>
+				) : (
+					<>
+						<span>Press</span>
+						<Kbd>{pinKey.toUpperCase()}</Kbd>
+						<span>to pin the tooltip</span>
+					</>
+				)}
+			</div>
+
+			{isPinned && (
+				<Button
+					variant="outlined"
+					color="secondary"
+					size="sm"
+					onClick={dismiss}
+					aria-label="Unpin tooltip"
+					data-testid="uplot-tooltip-unpin"
+				>
+					<X size={10} />
+					<span>Unpin</span>
+				</Button>
+			)}
+		</div>
+	);
+}

frontend/src/lib/uPlotV2/components/Tooltip/components/TooltipHeader/TooltipHeader.module.scss

@@ -0,0 +1,32 @@
+.headerContainer {
+	padding: 1rem 1rem 0 1rem;
+	display: flex;
+	flex-direction: column;
+	gap: var(--spacing-4);
+
+	&:last-child {
+		padding-bottom: var(--spacing-4);
+	}
+}
+
+.headerRow {
+	font-size: var(--font-size-sm);
+	font-weight: 500;
+	display: flex;
+	align-items: center;
+	justify-content: space-between;
+	gap: var(--spacing-2);
+}
+
+.status {
+	display: flex;
+	align-items: center;
+	gap: var(--spacing-1);
+	font-size: 10px;
+	font-weight: 600;
+	text-transform: uppercase;
+	letter-spacing: 0.05em;
+	color: var(--callout-primary-title);
+	flex-shrink: 0;
+}
+

frontend/src/lib/uPlotV2/components/Tooltip/components/TooltipHeader/TooltipHeader.tsx

@@ -0,0 +1,85 @@
+import { useMemo } from 'react';
+import cx from 'classnames';
+import type { Timezone } from 'components/CustomTimePicker/timezoneUtils';
+import { DATE_TIME_FORMATS } from 'constants/dateTimeFormats';
+import dayjs from 'dayjs';
+import { Pin } from 'lucide-react';
+import { useTimezone } from 'providers/Timezone';
+import type uPlot from 'uplot';
+
+import { TooltipContentItem } from '../../../types';
+import TooltipItem from '../TooltipItem/TooltipItem';
+
+import Styles from './TooltipHeader.module.scss';
+
+interface TooltipHeaderProps {
+	uPlotInstance: uPlot;
+	timezone?: Timezone;
+	showTooltipHeader: boolean;
+	isPinned: boolean;
+	activeItem: TooltipContentItem | null;
+}
+
+export default function TooltipHeader({
+	uPlotInstance,
+	timezone,
+	showTooltipHeader,
+	isPinned,
+	activeItem,
+}: TooltipHeaderProps): JSX.Element {
+	const { timezone: userTimezone } = useTimezone();
+	const resolvedTimezone = timezone?.value ?? userTimezone.value;
+
+	const headerTitle = useMemo(() => {
+		if (!showTooltipHeader) {
+			return null;
+		}
+		const cursorIdx = uPlotInstance.cursor.idx;
+		if (cursorIdx == null) {
+			return null;
+		}
+		const timestamp = uPlotInstance.data[0]?.[cursorIdx];
+		if (timestamp == null) {
+			return null;
+		}
+		return dayjs(timestamp * 1000)
+			.tz(resolvedTimezone)
+			.format(DATE_TIME_FORMATS.MONTH_DATETIME_SECONDS);
+	}, [
+		resolvedTimezone,
+		uPlotInstance.data,
+		uPlotInstance.cursor.idx,
+		showTooltipHeader,
+	]);
+
+	return (
+		<div
+			className={Styles.headerContainer}
+			data-testid="uplot-tooltip-header-container"
+		>
+			{showTooltipHeader && headerTitle && (
+				<div className={Styles.headerRow}>
+					<span>{headerTitle}</span>
+					{isPinned && (
+						<div className={cx(Styles.status)} data-testid="uplot-tooltip-status">
+							<>
+								<Pin size={12} />
+								<span>Pinned</span>
+							</>
+						</div>
+					)}
+				</div>
+			)}
+
+			{activeItem && (
+				<TooltipItem
+					item={activeItem}
+					isItemActive={true}
+					containerTestId="uplot-tooltip-pinned"
+					markerTestId="uplot-tooltip-pinned-marker"
+					contentTestId="uplot-tooltip-pinned-content"
+				/>
+			)}
+		</div>
+	);
+}

frontend/src/lib/uPlotV2/components/Tooltip/components/TooltipList/TooltipList.module.scss

@@ -0,0 +1,27 @@
+.list {
+	width: 100%;
+	:global(div[data-viewport-type='element']) {
+		left: 0;
+		box-sizing: border-box;
+		padding: 4px 12px 4px 16px;
+	}
+
+	&::-webkit-scrollbar {
+		width: 0.3rem;
+	}
+
+	&::-webkit-scrollbar-track {
+		background: transparent;
+	}
+
+	&::-webkit-scrollbar-thumb {
+		background: var(--bg-slate-100);
+		border-radius: 0.5rem;
+	}
+}
+
+.listLightMode {
+	&::-webkit-scrollbar-thumb {
+		background: var(--bg-vanilla-400);
+	}
+}

frontend/src/lib/uPlotV2/components/Tooltip/components/TooltipList/TooltipList.tsx

@@ -0,0 +1,48 @@
+import { useMemo, useState } from 'react';
+import { Virtuoso } from 'react-virtuoso';
+import cx from 'classnames';
+import { useIsDarkMode } from 'hooks/useDarkMode';
+
+import { TooltipContentItem } from '../../../types';
+import TooltipItem from '../TooltipItem/TooltipItem';
+
+import Styles from './TooltipList.module.scss';
+
+// Fallback per-item height before Virtuoso reports the real total.
+const TOOLTIP_ITEM_HEIGHT = 38;
+const LIST_MAX_HEIGHT = 300;
+
+interface TooltipListProps {
+	content: TooltipContentItem[];
+}
+
+export default function TooltipList({
+	content,
+}: TooltipListProps): JSX.Element {
+	const isDarkMode = useIsDarkMode();
+	const [totalListHeight, setTotalListHeight] = useState(0);
+
+	// Use the measured height from Virtuoso when available; fall back to a
+	// per-item estimate on first render. Math.ceil prevents a 1 px
+	// subpixel rounding gap from triggering a spurious scrollbar.
+	const height = useMemo(
+		() =>
+			totalListHeight > 0
+				? Math.ceil(Math.min(totalListHeight, LIST_MAX_HEIGHT))
+				: Math.min(content.length * TOOLTIP_ITEM_HEIGHT, LIST_MAX_HEIGHT),
+		[totalListHeight, content.length],
+	);
+
+	return (
+		<Virtuoso
+			className={cx(Styles.list, !isDarkMode && Styles.listLightMode)}
+			data-testid="uplot-tooltip-list"
+			data={content}
+			style={{ height }}
+			totalListHeightChanged={setTotalListHeight}
+			itemContent={(_, item): JSX.Element => (
+				<TooltipItem item={item} isItemActive={false} />
+			)}
+		/>
+	);
+}

frontend/src/lib/uPlotV2/components/types.ts

@@ -62,6 +62,7 @@ export interface TooltipRenderArgs {
 
 export interface BaseTooltipProps {
 	showTooltipHeader?: boolean;
+	canPinTooltip?: boolean;
 	yAxisUnit?: string;
 	decimalPrecision?: PrecisionOption;
 	content?: TooltipContentItem[];

frontend/src/lib/uPlotV2/plugins/TooltipPlugin/TooltipPlugin.module.scss

@@ -1,4 +1,4 @@
-.tooltip-plugin-container {
+.tooltipPluginContainer {
 	top: 0;
 	left: 0;
 	width: 100%;
@@ -10,13 +10,9 @@
 	transform: translate(-1000px, -1000px); // hide the tooltip initially
 	opacity: 0;
 	pointer-events: none;
-
-	&.pinned {
-		box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
-	}
-
-	&.visible {
-		opacity: 1;
-		pointer-events: all;
-	}
+}
+
+.visible {
+	opacity: 1;
+	pointer-events: all;
 }

frontend/src/lib/uPlotV2/plugins/TooltipPlugin/TooltipPlugin.tsx

@@ -1,7 +1,6 @@
 import { useCallback, useLayoutEffect, useMemo, useRef, useState } from 'react';
 import { createPortal } from 'react-dom';
 import cx from 'classnames';
-import { getFocusedSeriesAtPosition } from 'lib/uPlotLib/plugins/onClickPlugin';
 import uPlot from 'uplot';
 
 import { syncCursorRegistry } from './syncCursorRegistry';
@@ -17,18 +16,21 @@ import {
 } from './tooltipController';
 import {
 	DashboardCursorSync,
-	TooltipClickData,
+	DEFAULT_PIN_TOOLTIP_KEY,
 	TooltipControllerContext,
 	TooltipControllerState,
 	TooltipLayoutInfo,
 	TooltipPluginProps,
 	TooltipViewState,
 } from './types';
-import { createInitialViewState, createLayoutObserver } from './utils';
+import {
+	buildClickData,
+	createInitialViewState,
+	createLayoutObserver,
+} from './utils';
 
-import './TooltipPlugin.styles.scss';
+import Styles from './TooltipPlugin.module.scss';
 
-const INTERACTIVE_CONTAINER_CLASSNAME = '.tooltip-plugin-container';
 // Delay before hiding an unpinned tooltip when the cursor briefly leaves
 // the plot – this avoids flicker when moving between nearby points.
 const HOVER_DISMISS_DELAY_MS = 100;
@@ -44,6 +46,8 @@ export default function TooltipPlugin({
 	syncMetadata,
 	pinnedTooltipElement,
 	canPinTooltip = false,
+	pinKey = DEFAULT_PIN_TOOLTIP_KEY,
+	onClick,
 }: TooltipPluginProps): JSX.Element | null {
 	const containerRef = useRef<HTMLDivElement>(null);
 	const rafId = useRef<number | null>(null);
@@ -131,8 +135,8 @@ export default function TooltipPlugin({
 		// Dismiss the tooltip when the user clicks / presses a key
 		// outside the tooltip container while it is pinned.
 		const onOutsideInteraction = (event: Event): void => {
-			const target = event.target as HTMLElement;
-			if (!target.closest(INTERACTIVE_CONTAINER_CLASSNAME)) {
+			const target = event.target as Node;
+			if (!containerRef.current?.contains(target)) {
 				dismissTooltip();
 			}
 		};
@@ -159,13 +163,14 @@ export default function TooltipPlugin({
 
 		// Attach / detach global listeners when pin state changes so
 		// we can detect when the user interacts outside the tooltip.
+		// Keyboard unpinning is handled exclusively in handleKeyDown so
+		// that only P (toggle) and Escape (release) can dismiss — not
+		// arbitrary keystrokes like arrow keys or Tab.
 		function toggleOutsideListeners(enable: boolean): void {
 			if (enable) {
 				document.addEventListener('mousedown', onOutsideInteraction, true);
-				document.addEventListener('keydown', onOutsideInteraction, true);
 			} else {
 				document.removeEventListener('mousedown', onOutsideInteraction, true);
-				document.removeEventListener('keydown', onOutsideInteraction, true);
 			}
 		}
 
@@ -283,66 +288,84 @@ export default function TooltipPlugin({
 			}
 		};
 
-		// When pinning is enabled, a click on the plot overlay while
-		// hovering converts the transient tooltip into a pinned one.
-		// Uses getPlot(controller) to avoid closing over u (plot), which
-		// would retain the plot and detached canvases across unmounts.
-		const handleUPlotOverClick = (event: MouseEvent): void => {
+		// Handles all tooltip-pin keyboard interactions:
+		//   Escape  — always releases the tooltip when pinned (never steals Escape
+		//             from other handlers since we do not call stopPropagation).
+		//   pinKey  — toggles: pins when hovering+unpinned, unpins when pinned.
+		const handleKeyDown = (event: KeyboardEvent): void => {
+			// Escape: release-only (never toggles on).
+			if (event.key === 'Escape') {
+				if (controller.pinned) {
+					dismissTooltip();
+				}
+				return;
+			}
+
+			if (event.key.toLowerCase() !== pinKey.toLowerCase()) {
+				return;
+			}
+
+			// Toggle off: P pressed while already pinned.
+			if (controller.pinned) {
+				dismissTooltip();
+				return;
+			}
+
+			// Toggle on: P pressed while hovering.
 			const plot = getPlot(controller);
+			if (
+				!plot ||
+				!controller.hoverActive ||
+				controller.focusedSeriesIndex == null
+			) {
+				return;
+			}
+
+			const cursorLeft = plot.cursor.left ?? -1;
+			const cursorTop = plot.cursor.top ?? -1;
+			if (cursorLeft < 0 || cursorTop < 0) {
+				return;
+			}
+
+			const plotRect = plot.over.getBoundingClientRect();
+			const syntheticEvent = ({
+				clientX: plotRect.left + cursorLeft,
+				clientY: plotRect.top + cursorTop,
+				target: plot.over,
+				offsetX: cursorLeft,
+				offsetY: cursorTop,
+			} as unknown) as MouseEvent;
+
+			controller.clickData = buildClickData(syntheticEvent, plot);
+			controller.pinned = true;
+			scheduleRender(true);
+		};
+
+		// Forward overlay clicks to the consumer-provided onClick callback.
+		const handleOverClick = (event: MouseEvent): void => {
+			const plot = getPlot(controller);
+			/**
+			 * Only trigger onClick if the click happened on the plot overlay and there is a focused series.
+			 * It also ensures that clicks only trigger onClick when there is a relevant data point (i.e. a focused series) to provide context for the click.
+			 */
 			if (
 				plot &&
 				event.target === plot.over &&
-				controller.hoverActive &&
-				!controller.pinned &&
 				controller.focusedSeriesIndex != null
 			) {
-				const xValue = plot.posToVal(event.offsetX, 'x');
-				const yValue = plot.posToVal(event.offsetY, 'y');
-				const focusedSeries = getFocusedSeriesAtPosition(event, plot);
-
-				let clickedDataTimestamp = xValue;
-				if (focusedSeries) {
-					const dataIndex = plot.posToIdx(event.offsetX);
-					const xSeriesData = plot.data[0];
-					if (
-						xSeriesData &&
-						dataIndex >= 0 &&
-						dataIndex < xSeriesData.length &&
-						xSeriesData[dataIndex] !== undefined
-					) {
-						clickedDataTimestamp = xSeriesData[dataIndex];
-					}
-				}
-
-				const clickData: TooltipClickData = {
-					xValue,
-					yValue,
-					focusedSeries,
-					clickedDataTimestamp,
-					mouseX: event.offsetX,
-					mouseY: event.offsetY,
-					absoluteMouseX: event.clientX,
-					absoluteMouseY: event.clientY,
-				};
-
-				controller.clickData = clickData;
-
-				setTimeout(() => {
-					controller.pinned = true;
-					scheduleRender(true);
-				}, 0);
+				const clickData = buildClickData(event, plot);
+				onClick?.(clickData);
 			}
 		};
 
 		let overClickHandler: ((event: MouseEvent) => void) | null = null;
 
-		// Called once per uPlot instance; used to store the instance
-		// on the controller and optionally attach the pinning handler.
+		// Called once per uPlot instance; used to store the instance on the controller.
 		const handleInit = (u: uPlot): void => {
 			controller.plot = u;
 			updateState({ hasPlot: true });
-			if (canPinTooltip) {
-				overClickHandler = handleUPlotOverClick;
+			if (onClick) {
+				overClickHandler = handleOverClick;
 				u.over.addEventListener('click', overClickHandler);
 			}
 		};
@@ -389,13 +412,18 @@ export default function TooltipPlugin({
 
 		window.addEventListener('resize', handleWindowResize);
 		window.addEventListener('scroll', handleScroll, true);
+		if (canPinTooltip) {
+			document.addEventListener('keydown', handleKeyDown, true);
+		}
 
 		return (): void => {
 			layoutRef.current?.observer.disconnect();
 			window.removeEventListener('resize', handleWindowResize);
 			window.removeEventListener('scroll', handleScroll, true);
 			document.removeEventListener('mousedown', onOutsideInteraction, true);
-			document.removeEventListener('keydown', onOutsideInteraction, true);
+			if (canPinTooltip) {
+				document.removeEventListener('keydown', handleKeyDown, true);
+			}
 			cancelPendingRender();
 			removeReadyHook();
 			removeInitHook();
@@ -405,9 +433,7 @@ export default function TooltipPlugin({
 			removeSetCursorHook();
 			if (overClickHandler) {
 				const plot = getPlot(controller);
-				if (plot) {
-					plot.over.removeEventListener('click', overClickHandler);
-				}
+				plot?.over.removeEventListener('click', overClickHandler);
 				overClickHandler = null;
 			}
 			clearPlotReferences();
@@ -447,8 +473,12 @@ export default function TooltipPlugin({
 	}, [isHovering, hasPlot]);
 
 	const tooltipBody = useMemo(() => {
-		if (isPinned && pinnedTooltipElement != null && viewState.clickData != null) {
-			return pinnedTooltipElement(viewState.clickData);
+		if (isPinned) {
+			if (pinnedTooltipElement != null && viewState.clickData != null) {
+				return pinnedTooltipElement(viewState.clickData);
+			}
+			// No custom pinned element — keep showing the last hover contents.
+			return contents ?? null;
 		}
 
 		if (isHovering) {
@@ -471,9 +501,8 @@ export default function TooltipPlugin({
 
 	return createPortal(
 		<div
-			className={cx('tooltip-plugin-container', {
-				pinned: isPinned,
-				visible: isTooltipVisible,
+			className={cx(Styles.tooltipPluginContainer, {
+				[Styles.visible]: isTooltipVisible,
 			})}
 			style={{
 				...style,
@@ -484,6 +513,7 @@ export default function TooltipPlugin({
 			aria-atomic="true"
 			aria-hidden={!isTooltipVisible}
 			ref={containerRef}
+			data-pinned={isPinned}
 			data-testid="tooltip-plugin-container"
 		>
 			{tooltipBody}

frontend/src/lib/uPlotV2/plugins/TooltipPlugin/tooltipController.ts

@@ -102,6 +102,12 @@ export function updateHoverState(
 	controller: TooltipControllerState,
 	syncTooltipWithDashboard: boolean,
 ): void {
+	// When pinned, keep hoverActive stable so the tooltip stays visible
+	// until explicitly dismissed — the cursor lock fires asynchronously
+	// and setSeries/setLegend can otherwise race and clear hoverActive.
+	if (controller.pinned) {
+		return;
+	}
 	// When the cursor is driven by dashboard‑level sync, we only show
 	// the tooltip if the plot is in viewport and at least one series
 	// is active. Otherwise we fall back to local interaction logic.

frontend/src/lib/uPlotV2/plugins/TooltipPlugin/types.ts

@@ -11,6 +11,9 @@ import type { UPlotConfigBuilder } from '../../config/UPlotConfigBuilder';
 
 export const TOOLTIP_OFFSET = 10;
 
+// Default key that pins the tooltip while hovering over the chart.
+export const DEFAULT_PIN_TOOLTIP_KEY = 'p';
+
 export enum DashboardCursorSync {
 	Crosshair,
 	None,
@@ -41,6 +44,10 @@ export interface TooltipSyncMetadata {
 export interface TooltipPluginProps {
 	config: UPlotConfigBuilder;
 	canPinTooltip?: boolean;
+	/** Key that pins the tooltip while hovering. Defaults to DEFAULT_PIN_TOOLTIP_KEY ('l'). */
+	pinKey?: string;
+	/** Called when the user clicks the uPlot overlay. Receives resolved click data. */
+	onClick?: (clickData: TooltipClickData) => void;
 	syncMode?: DashboardCursorSync;
 	syncKey?: string;
 	syncMetadata?: TooltipSyncMetadata;

frontend/src/lib/uPlotV2/plugins/TooltipPlugin/utils.ts

@@ -1,4 +1,11 @@
-import { TOOLTIP_OFFSET, TooltipLayoutInfo, TooltipViewState } from './types';
+import { getFocusedSeriesAtPosition } from 'lib/uPlotLib/plugins/onClickPlugin';
+
+import {
+	TOOLTIP_OFFSET,
+	TooltipClickData,
+	TooltipLayoutInfo,
+	TooltipViewState,
+} from './types';
 
 export function isPlotInViewport(
 	rect: uPlot.BBox,
@@ -158,3 +165,40 @@ export function createLayoutObserver(
 	};
 	return layout;
 }
+
+/**
+ * Resolves a TooltipClickData snapshot from a MouseEvent (real or synthetic)
+ * and the current uPlot instance. Shared by the overlay click handler and the
+ * keyboard-pin handler (which synthesises an event from the cursor position).
+ */
+export function buildClickData(
+	event: MouseEvent,
+	plot: uPlot,
+): TooltipClickData {
+	const xValue = plot.posToVal(event.offsetX, 'x');
+	const yValue = plot.posToVal(event.offsetY, 'y');
+	const focusedSeries = getFocusedSeriesAtPosition(event, plot);
+
+	const dataIndex = plot.posToIdx(event.offsetX);
+	let clickedDataTimestamp = xValue;
+	const xSeriesData = plot.data[0];
+	if (
+		xSeriesData &&
+		dataIndex >= 0 &&
+		dataIndex < xSeriesData.length &&
+		xSeriesData[dataIndex] !== undefined
+	) {
+		clickedDataTimestamp = xSeriesData[dataIndex];
+	}
+
+	return {
+		xValue,
+		yValue,
+		focusedSeries,
+		clickedDataTimestamp,
+		mouseX: event.offsetX,
+		mouseY: event.offsetY,
+		absoluteMouseX: event.clientX,
+		absoluteMouseY: event.clientY,
+	};
+}

frontend/src/lib/uPlotV2/plugins/__tests__/TooltipPlugin.test.ts

@@ -7,7 +7,10 @@ import type uPlot from 'uplot';
 import { TooltipRenderArgs } from '../../components/types';
 import { UPlotConfigBuilder } from '../../config/UPlotConfigBuilder';
 import TooltipPlugin from '../TooltipPlugin/TooltipPlugin';
-import { DashboardCursorSync } from '../TooltipPlugin/types';
+import {
+	DashboardCursorSync,
+	DEFAULT_PIN_TOOLTIP_KEY,
+} from '../TooltipPlugin/types';
 
 // Avoid depending on the full uPlot + onClickPlugin behaviour in these tests.
 // We only care that pinning logic runs without throwing, not which series is focused.
@@ -60,7 +63,7 @@ function getHandler(config: ConfigMock, hookName: string): HookHandler {
 function createFakePlot(): {
 	over: HTMLDivElement;
 	setCursor: jest.Mock<void, [uPlot.Cursor]>;
-	cursor: { event: Record<string, unknown> };
+	cursor: { event: Record<string, unknown>; left: number; top: number };
 	posToVal: jest.Mock<number, [value: number]>;
 	posToIdx: jest.Mock<number, []>;
 	data: [number[], number[]];
@@ -71,7 +74,9 @@ function createFakePlot(): {
 	return {
 		over,
 		setCursor: jest.fn(),
-		cursor: { event: {} },
+		// left / top are set to valid values so keyboard-pin tests do not
+		// hit the "cursor off-screen" guard inside handleKeyDown.
+		cursor: { event: {}, left: 50, top: 50 },
 		// In real uPlot these map overlay coordinates to data-space values.
 		posToVal: jest.fn((value: number) => value),
 		posToIdx: jest.fn(() => 0),
@@ -144,7 +149,7 @@ describe('TooltipPlugin', () => {
 				}),
 			);
 
-			expect(document.querySelector('.tooltip-plugin-container')).toBeNull();
+			expect(screen.queryByTestId('tooltip-plugin-container')).toBeNull();
 		});
 
 		it('registers all required uPlot hooks on mount', () => {
@@ -182,9 +187,7 @@ describe('TooltipPlugin', () => {
 			expect(renderTooltip).toHaveBeenCalled();
 			expect(screen.getByText('tooltip-body')).toBeInTheDocument();
 
-			const container = document.querySelector(
-				'.tooltip-plugin-container',
-			) as HTMLElement;
+			const container = screen.getByTestId('tooltip-plugin-container');
 			expect(container).not.toBeNull();
 			expect(container.parentElement).toBe(document.body);
 		});
@@ -203,9 +206,7 @@ describe('TooltipPlugin', () => {
 
 			renderAndActivateHover(config);
 
-			const container = document.querySelector(
-				'.tooltip-plugin-container',
-			) as HTMLElement;
+			const container = screen.getByTestId('tooltip-plugin-container');
 			expect(container.parentElement).toBe(document.body);
 
 			const fullscreenRoot = document.createElement('div');
@@ -245,24 +246,27 @@ describe('TooltipPlugin', () => {
 	// ---- Pin behaviour ----------------------------------------------------------
 
 	describe('pin behaviour', () => {
-		it('pins the tooltip when canPinTooltip is true and overlay is clicked', () => {
+		it('pins the tooltip when canPinTooltip is true and the pinKey is pressed while hovering', () => {
 			const config = createConfigMock();
 
-			const fakePlot = renderAndActivateHover(config, undefined, {
-				canPinTooltip: true,
-			});
+			renderAndActivateHover(config, undefined, { canPinTooltip: true });
 
 			const container = screen.getByTestId('tooltip-plugin-container');
-			expect(container.classList.contains('pinned')).toBe(false);
+			expect(container.getAttribute('data-pinned') === 'true').toBe(false);
 
 			act(() => {
-				fakePlot.over.dispatchEvent(new MouseEvent('click', { bubbles: true }));
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', {
+						key: DEFAULT_PIN_TOOLTIP_KEY,
+						bubbles: true,
+					}),
+				);
 			});
 
 			return waitFor(() => {
 				const updated = screen.getByTestId('tooltip-plugin-container');
 				expect(updated).toBeInTheDocument();
-				expect(updated.classList.contains('pinned')).toBe(true);
+				expect(updated.getAttribute('data-pinned') === 'true').toBe(true);
 			});
 		});
 
@@ -272,7 +276,7 @@ describe('TooltipPlugin', () => {
 				React.createElement('div', null, 'pinned-tooltip'),
 			);
 
-			const fakePlot = renderAndActivateHover(
+			renderAndActivateHover(
 				config,
 				() => React.createElement('div', null, 'hover-tooltip'),
 				{
@@ -284,7 +288,12 @@ describe('TooltipPlugin', () => {
 			expect(screen.getByText('hover-tooltip')).toBeInTheDocument();
 
 			act(() => {
-				fakePlot.over.dispatchEvent(new MouseEvent('click', { bubbles: true }));
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', {
+						key: DEFAULT_PIN_TOOLTIP_KEY,
+						bubbles: true,
+					}),
+				);
 			});
 
 			await waitFor(() => {
@@ -318,18 +327,20 @@ describe('TooltipPlugin', () => {
 				getHandler(config, 'setSeries')(fakePlot, 1, { focus: true });
 			});
 
-			// Pin the tooltip.
+			// Pin the tooltip via the keyboard shortcut.
 			act(() => {
-				fakePlot.over.dispatchEvent(new MouseEvent('click', { bubbles: true }));
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', {
+						key: DEFAULT_PIN_TOOLTIP_KEY,
+						bubbles: true,
+					}),
+				);
 			});
 
-			// Wait until the tooltip is actually pinned (pointer events enabled)
+			// Wait until the tooltip is actually pinned.
 			await waitFor(() => {
-				const container = document.querySelector(
-					'.tooltip-plugin-container',
-				) as HTMLElement | null;
-				expect(container).not.toBeNull();
-				expect(container?.classList.contains('pinned')).toBe(true);
+				const container = screen.getByTestId('tooltip-plugin-container');
+				expect(container.getAttribute('data-pinned') === 'true').toBe(true);
 			});
 
 			const button = await screen.findByRole('button', { name: 'Dismiss' });
@@ -342,8 +353,7 @@ describe('TooltipPlugin', () => {
 
 				expect(container).toBeInTheDocument();
 				expect(container.getAttribute('aria-hidden')).toBe('true');
-				expect(container.classList.contains('visible')).toBe(false);
-				expect(container.classList.contains('pinned')).toBe(false);
+				expect(container.getAttribute('data-pinned') === 'true').toBe(false);
 				expect(container.textContent).toBe('');
 			});
 		});
@@ -369,16 +379,21 @@ describe('TooltipPlugin', () => {
 				jest.runAllTimers();
 			});
 
-			// Pin.
+			// Pin via keyboard.
 			act(() => {
-				fakePlot.over.dispatchEvent(new MouseEvent('click', { bubbles: true }));
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', {
+						key: DEFAULT_PIN_TOOLTIP_KEY,
+						bubbles: true,
+					}),
+				);
 				jest.runAllTimers();
 			});
 
 			expect(
-				(document.querySelector(
-					'.tooltip-plugin-container',
-				) as HTMLElement)?.classList.contains('pinned'),
+				screen
+					.getByTestId('tooltip-plugin-container')
+					.getAttribute('data-pinned') === 'true',
 			).toBe(true);
 
 			// Simulate data update – should dismiss the pinned tooltip.
@@ -390,8 +405,7 @@ describe('TooltipPlugin', () => {
 			const container = screen.getByTestId('tooltip-plugin-container');
 			expect(container).toBeInTheDocument();
 			expect(container.getAttribute('aria-hidden')).toBe('true');
-			expect(container.classList.contains('visible')).toBe(false);
-			expect(container.classList.contains('pinned')).toBe(false);
+			expect(container.getAttribute('data-pinned') === 'true').toBe(false);
 
 			jest.useRealTimers();
 		});
@@ -417,15 +431,21 @@ describe('TooltipPlugin', () => {
 				jest.runAllTimers();
 			});
 
+			// Pin via keyboard.
 			act(() => {
-				fakePlot.over.dispatchEvent(new MouseEvent('click', { bubbles: true }));
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', {
+						key: DEFAULT_PIN_TOOLTIP_KEY,
+						bubbles: true,
+					}),
+				);
 				jest.runAllTimers();
 			});
 
 			expect(
-				document
-					.querySelector('.tooltip-plugin-container')
-					?.classList.contains('pinned'),
+				screen
+					.getByTestId('tooltip-plugin-container')
+					.getAttribute('data-pinned') === 'true',
 			).toBe(true);
 
 			// Click outside the tooltip container.
@@ -439,14 +459,13 @@ describe('TooltipPlugin', () => {
 
 				expect(container).toBeInTheDocument();
 				expect(container.getAttribute('aria-hidden')).toBe('true');
-				expect(container.classList.contains('visible')).toBe(false);
-				expect(container.classList.contains('pinned')).toBe(false);
+				expect(container.getAttribute('data-pinned') === 'true').toBe(false);
 			});
 
 			jest.useRealTimers();
 		});
 
-		it('unpins the tooltip on outside keydown', async () => {
+		it('unpins the tooltip when Escape is pressed while pinned', async () => {
 			jest.useFakeTimers();
 			const config = createConfigMock();
 
@@ -467,18 +486,24 @@ describe('TooltipPlugin', () => {
 				jest.runAllTimers();
 			});
 
+			// Pin via keyboard.
 			act(() => {
-				fakePlot.over.dispatchEvent(new MouseEvent('click', { bubbles: true }));
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', {
+						key: DEFAULT_PIN_TOOLTIP_KEY,
+						bubbles: true,
+					}),
+				);
 				jest.runAllTimers();
 			});
 
 			expect(
-				document
-					.querySelector('.tooltip-plugin-container')
-					?.classList.contains('pinned'),
+				screen
+					.getByTestId('tooltip-plugin-container')
+					.getAttribute('data-pinned') === 'true',
 			).toBe(true);
 
-			// Press a key outside the tooltip.
+			// Press Escape to release.
 			act(() => {
 				document.body.dispatchEvent(
 					new KeyboardEvent('keydown', { key: 'Escape', bubbles: true }),
@@ -490,12 +515,282 @@ describe('TooltipPlugin', () => {
 				const container = screen.getByTestId('tooltip-plugin-container');
 				expect(container).toBeInTheDocument();
 				expect(container.getAttribute('aria-hidden')).toBe('true');
-				expect(container.classList.contains('visible')).toBe(false);
-				expect(container.classList.contains('pinned')).toBe(false);
+				expect(container.getAttribute('data-pinned') === 'true').toBe(false);
 			});
 
 			jest.useRealTimers();
 		});
+
+		it('unpins the tooltip when the pin key is pressed a second time (toggle off)', async () => {
+			jest.useFakeTimers();
+			const config = createConfigMock();
+
+			renderAndActivateHover(config, undefined, { canPinTooltip: true });
+			jest.runAllTimers();
+
+			// First press — pin.
+			act(() => {
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', {
+						key: DEFAULT_PIN_TOOLTIP_KEY,
+						bubbles: true,
+					}),
+				);
+				jest.runAllTimers();
+			});
+
+			await waitFor(() => {
+				expect(
+					screen
+						.getByTestId('tooltip-plugin-container')
+						.getAttribute('data-pinned') === 'true',
+				).toBe(true);
+			});
+
+			// Second press — unpin (toggle off).
+			act(() => {
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', {
+						key: DEFAULT_PIN_TOOLTIP_KEY,
+						bubbles: true,
+					}),
+				);
+				jest.runAllTimers();
+			});
+
+			await waitFor(() => {
+				const container = screen.getByTestId('tooltip-plugin-container');
+				expect(container.getAttribute('data-pinned') === 'true').toBe(false);
+			});
+
+			jest.useRealTimers();
+		});
+
+		it('does not unpin on Escape when tooltip is not pinned', () => {
+			const config = createConfigMock();
+			renderAndActivateHover(config, undefined, { canPinTooltip: true });
+
+			// Escape without pinning first — should be a no-op.
+			act(() => {
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', { key: 'Escape', bubbles: true }),
+				);
+			});
+
+			const container = screen.getByTestId('tooltip-plugin-container');
+			// Tooltip should still be hovering (visible), not dismissed.
+			expect(container.getAttribute('aria-hidden')).toBe('false');
+			expect(container.getAttribute('data-pinned') === 'true').toBe(false);
+		});
+
+		it('does not unpin on arbitrary keys that are not Escape or the pin key', async () => {
+			jest.useFakeTimers();
+			const config = createConfigMock();
+
+			renderAndActivateHover(config, undefined, { canPinTooltip: true });
+			jest.runAllTimers();
+
+			// Pin.
+			act(() => {
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', {
+						key: DEFAULT_PIN_TOOLTIP_KEY,
+						bubbles: true,
+					}),
+				);
+				jest.runAllTimers();
+			});
+
+			await waitFor(() => {
+				expect(
+					screen
+						.getByTestId('tooltip-plugin-container')
+						.getAttribute('data-pinned') === 'true',
+				).toBe(true);
+			});
+
+			// Arrow key — should NOT unpin.
+			act(() => {
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', { key: 'ArrowDown', bubbles: true }),
+				);
+				jest.runAllTimers();
+			});
+
+			await waitFor(() => {
+				expect(
+					screen
+						.getByTestId('tooltip-plugin-container')
+						.getAttribute('data-pinned') === 'true',
+				).toBe(true);
+			});
+
+			jest.useRealTimers();
+		});
+	});
+
+	// ---- Keyboard pin edge cases ------------------------------------------------
+
+	describe('keyboard pin edge cases', () => {
+		it('does not pin when cursor coordinates are negative (cursor off-screen)', () => {
+			const config = createConfigMock();
+
+			render(
+				React.createElement(TooltipPlugin, {
+					config,
+					render: () => React.createElement('div', null, 'tooltip-body'),
+					syncMode: DashboardCursorSync.None,
+					canPinTooltip: true,
+				}),
+			);
+
+			// Negative cursor coords — handleKeyDown bails out before pinning.
+			const fakePlot = {
+				...createFakePlot(),
+				cursor: { event: {}, left: -1, top: -1 },
+			};
+
+			act(() => {
+				getHandler(config, 'init')(fakePlot);
+				getHandler(config, 'setSeries')(fakePlot, 1, { focus: true });
+			});
+
+			act(() => {
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', {
+						key: DEFAULT_PIN_TOOLTIP_KEY,
+						bubbles: true,
+					}),
+				);
+			});
+
+			const container = screen.getByTestId('tooltip-plugin-container');
+			expect(container.getAttribute('data-pinned') === 'true').toBe(false);
+		});
+
+		it('does not pin when hover is not active', () => {
+			const config = createConfigMock();
+
+			render(
+				React.createElement(TooltipPlugin, {
+					config,
+					render: () => React.createElement('div', null, 'tooltip-body'),
+					syncMode: DashboardCursorSync.None,
+					canPinTooltip: true,
+				}),
+			);
+
+			const fakePlot = createFakePlot();
+
+			act(() => {
+				// Initialise the plot but do NOT call setSeries – hoverActive stays false.
+				getHandler(config, 'init')(fakePlot);
+			});
+
+			act(() => {
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', {
+						key: DEFAULT_PIN_TOOLTIP_KEY,
+						bubbles: true,
+					}),
+				);
+			});
+
+			// The container exists once the plot is initialised, but it should
+			// be hidden and not pinned since hover was never activated.
+			const container = screen.getByTestId('tooltip-plugin-container');
+			expect(container.getAttribute('data-pinned') === 'true').toBe(false);
+			expect(container.getAttribute('aria-hidden')).toBe('true');
+		});
+
+		it('ignores other keys and only pins on the configured pinKey', async () => {
+			const config = createConfigMock();
+
+			renderAndActivateHover(config, undefined, {
+				canPinTooltip: true,
+				pinKey: 'p',
+			});
+
+			// 'l' should NOT pin when pinKey is 'p'.
+			act(() => {
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', {
+						key: 'l',
+						bubbles: true,
+					}),
+				);
+			});
+
+			await waitFor(() => {
+				expect(
+					screen
+						.getByTestId('tooltip-plugin-container')
+						.getAttribute('data-pinned') === 'true',
+				).toBe(false);
+			});
+
+			// Custom pin key 'p' SHOULD pin.
+			act(() => {
+				document.body.dispatchEvent(
+					new KeyboardEvent('keydown', { key: 'p', bubbles: true }),
+				);
+			});
+
+			await waitFor(() => {
+				expect(
+					screen
+						.getByTestId('tooltip-plugin-container')
+						.getAttribute('data-pinned') === 'true',
+				).toBe(true);
+			});
+		});
+
+		it('does not register a keydown listener when canPinTooltip is false', () => {
+			const config = createConfigMock();
+			const addSpy = jest.spyOn(document, 'addEventListener');
+
+			render(
+				React.createElement(TooltipPlugin, {
+					config,
+					render: () => null,
+					syncMode: DashboardCursorSync.None,
+					canPinTooltip: false,
+				}),
+			);
+
+			const keydownCalls = addSpy.mock.calls.filter(
+				([type]) => type === 'keydown',
+			);
+			expect(keydownCalls).toHaveLength(0);
+		});
+
+		it('removes the keydown pin listener on unmount', () => {
+			const config = createConfigMock();
+			const addSpy = jest.spyOn(document, 'addEventListener');
+			const removeSpy = jest.spyOn(document, 'removeEventListener');
+
+			const { unmount } = render(
+				React.createElement(TooltipPlugin, {
+					config,
+					render: () => null,
+					syncMode: DashboardCursorSync.None,
+					canPinTooltip: true,
+				}),
+			);
+
+			const pinListenerCall = addSpy.mock.calls.find(
+				([type]) => type === 'keydown',
+			);
+			expect(pinListenerCall).toBeDefined();
+			if (!pinListenerCall) {
+				return;
+			}
+			const [, pinListener, pinOptions] = pinListenerCall;
+
+			unmount();
+
+			expect(removeSpy).toHaveBeenCalledWith('keydown', pinListener, pinOptions);
+		});
 	});
 
 	// ---- Cursor sync ------------------------------------------------------------

frontend/yarn.lock

@@ -5593,10 +5593,10 @@
     tailwind-merge "^2.5.2"
     tailwindcss-animate "^1.0.7"
 
-"@signozhq/ui@0.0.9":
-  version "0.0.9"
-  resolved "https://registry.yarnpkg.com/@signozhq/ui/-/ui-0.0.9.tgz#e00f2ec86c5528eea91d1669510a702c4253de0d"
-  integrity sha512-L9DV0OF69Z2sMnxwPEGpSTiDxI/liT6+QfzngGVnxMl/9t3WKcPr1/p8dbPOcAS6bU9lQEBOiYlsoIejM8DsXw==
+"@signozhq/ui@0.0.10":
+  version "0.0.10"
+  resolved "https://registry.yarnpkg.com/@signozhq/ui/-/ui-0.0.10.tgz#cdbab838f8cb543cf5b483a86e9d9b65265b81ff"
+  integrity sha512-XLeET+PgSP7heqKMsb9YZOSRT3TpfMPHNQRnY1I4SK8mXSct7BYWwK0Q3Je0uf4Z3aWOcpRYoRUPHWZQBpweFQ==
   dependencies:
     "@chenglou/pretext" "^0.0.5"
     "@radix-ui/react-checkbox" "^1.2.3"

go.mod

@@ -30,7 +30,7 @@ require (
 	github.com/gorilla/mux v1.8.1
 	github.com/gorilla/websocket v1.5.4-0.20250319132907-e064f32e3674
 	github.com/huandu/go-sqlbuilder v1.39.1
-	github.com/jackc/pgx/v5 v5.8.0
+	github.com/jackc/pgx/v5 v5.9.2
 	github.com/json-iterator/go v1.1.13-0.20220915233716-71ac16282d12
 	github.com/knadh/koanf v1.5.0
 	github.com/knadh/koanf/v2 v2.3.2
@@ -66,6 +66,7 @@ require (
 	github.com/uptrace/bun/dialect/pgdialect v1.2.9
 	github.com/uptrace/bun/dialect/sqlitedialect v1.2.9
 	github.com/uptrace/bun/extra/bunotel v1.2.9
+	github.com/yuin/goldmark v1.7.16
 	go.opentelemetry.io/collector/confmap v1.51.0
 	go.opentelemetry.io/collector/otelcol v0.144.0
 	go.opentelemetry.io/collector/pdata v1.51.0

go.sum

@@ -675,8 +675,8 @@ github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsI
 github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
 github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 h1:iCEnooe7UlwOQYpKFhBabPMi4aNAfoODPEFNiAnClxo=
 github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761/go.mod h1:5TJZWKEWniPve33vlWYSoGYefn3gLQRzjfDlhSJ9ZKM=
-github.com/jackc/pgx/v5 v5.8.0 h1:TYPDoleBBme0xGSAX3/+NujXXtpZn9HBONkQC7IEZSo=
-github.com/jackc/pgx/v5 v5.8.0/go.mod h1:QVeDInX2m9VyzvNeiCJVjCkNFqzsNb43204HshNSZKw=
+github.com/jackc/pgx/v5 v5.9.2 h1:3ZhOzMWnR4yJ+RW1XImIPsD1aNSz4T4fyP7zlQb56hw=
+github.com/jackc/pgx/v5 v5.9.2/go.mod h1:mal1tBGAFfLHvZzaYh77YS/eC6IX9OWbRV1QIIM0Jn4=
 github.com/jackc/puddle/v2 v2.2.2 h1:PR8nw+E/1w0GLuRFSmiioY6UooMp6KJv0/61nB7icHo=
 github.com/jackc/puddle/v2 v2.2.2/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
 github.com/jessevdk/go-flags v1.6.1 h1:Cvu5U8UGrLay1rZfv/zP7iLpSHGUZ/Ou68T0iX1bBK4=
@@ -1153,6 +1153,8 @@ github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9de
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
+github.com/yuin/goldmark v1.7.16 h1:n+CJdUxaFMiDUNnWC3dMWCIQJSkxH4uz3ZwQBkAlVNE=
+github.com/yuin/goldmark v1.7.16/go.mod h1:ip/1k0VRfGynBgxOz0yCqHrbZXhcjxyuS66Brc7iBKg=
 github.com/yusufpapurcu/wmi v1.2.4 h1:zFUKzehAFReQwLys1b/iSMl+JQGSCSjtVqQn9bBrPo0=
 github.com/yusufpapurcu/wmi v1.2.4/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
 github.com/zeebo/assert v1.3.1 h1:vukIABvugfNMZMQO1ABsyQDJDTVQbn+LWSMy1ol1h6A=

pkg/templating/markdownrenderer/blockkit/blockkit.go

@@ -0,0 +1,755 @@
+package blockkit
+
+import (
+	"bytes"
+	"encoding/json"
+	"strings"
+
+	"github.com/SigNoz/signoz/pkg/types/templatingtypes"
+	"github.com/yuin/goldmark"
+	"github.com/yuin/goldmark/ast"
+	"github.com/yuin/goldmark/extension"
+	extensionast "github.com/yuin/goldmark/extension/ast"
+	"github.com/yuin/goldmark/renderer"
+	"github.com/yuin/goldmark/util"
+)
+
+// Extender is a goldmark.Extender that registers the Block Kit node renderer
+// together with the GFM extensions it relies on (tables, strikethrough, task
+// lists).
+var Extender goldmark.Extender = &extender{}
+
+type extender struct{}
+
+func (e *extender) Extend(m goldmark.Markdown) {
+	extension.Table.Extend(m)
+	extension.Strikethrough.Extend(m)
+	extension.TaskList.Extend(m)
+	m.Renderer().AddOptions(
+		renderer.WithNodeRenderers(util.Prioritized(newRenderer(), 1)),
+	)
+}
+
+// listFrame tracks state for a single level of list nesting.
+type listFrame struct {
+	style     string // "bullet" or "ordered"
+	indent    int
+	itemCount int
+}
+
+// listContext holds all state while processing a list tree.
+type listContext struct {
+	result             []templatingtypes.RichTextList
+	stack              []listFrame
+	current            *templatingtypes.RichTextList
+	currentItemInlines []interface{}
+}
+
+// tableContext holds state while processing a table.
+type tableContext struct {
+	rows               [][]templatingtypes.TableCell
+	currentRow         []templatingtypes.TableCell
+	currentCellInlines []interface{}
+	isHeader           bool
+}
+
+// nodeRenderer converts Markdown AST to Slack Block Kit JSON.
+type nodeRenderer struct {
+	blocks []interface{}
+	mrkdwn strings.Builder
+	// holds active styles for the current rich text element
+	styleStack []templatingtypes.RichTextStyle
+	// holds the current list context while processing a list tree.
+	listCtx *listContext
+	// holds the current table context while processing a table.
+	tableCtx *tableContext
+	// stores the current blockquote depth while processing a blockquote.
+	// so blockquote with nested list can be rendered correctly.
+	blockquoteDepth int
+}
+
+func newRenderer() renderer.NodeRenderer {
+	return &nodeRenderer{}
+}
+
+// RegisterFuncs registers node rendering functions.
+func (r *nodeRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
+	// Blocks
+	reg.Register(ast.KindDocument, r.renderDocument)
+	reg.Register(ast.KindHeading, r.renderHeading)
+	reg.Register(ast.KindParagraph, r.renderParagraph)
+	reg.Register(ast.KindThematicBreak, r.renderThematicBreak)
+	reg.Register(ast.KindCodeBlock, r.renderCodeBlock)
+	reg.Register(ast.KindFencedCodeBlock, r.renderFencedCodeBlock)
+	reg.Register(ast.KindBlockquote, r.renderBlockquote)
+	reg.Register(ast.KindList, r.renderList)
+	reg.Register(ast.KindListItem, r.renderListItem)
+	reg.Register(ast.KindImage, r.renderImage)
+
+	// Inlines
+	reg.Register(ast.KindText, r.renderText)
+	reg.Register(ast.KindEmphasis, r.renderEmphasis)
+	reg.Register(ast.KindCodeSpan, r.renderCodeSpan)
+	reg.Register(ast.KindLink, r.renderLink)
+
+	// Extensions
+	reg.Register(extensionast.KindStrikethrough, r.renderStrikethrough)
+	reg.Register(extensionast.KindTable, r.renderTable)
+	reg.Register(extensionast.KindTableHeader, r.renderTableHeader)
+	reg.Register(extensionast.KindTableRow, r.renderTableRow)
+	reg.Register(extensionast.KindTableCell, r.renderTableCell)
+	reg.Register(extensionast.KindTaskCheckBox, r.renderTaskCheckBox)
+}
+
+// inRichTextMode returns true when we're inside a list or table context
+// in slack blockkit list and table items are rendered as rich_text elements
+// if more cases are found in future those needs to be added here.
+func (r *nodeRenderer) inRichTextMode() bool {
+	return r.listCtx != nil || r.tableCtx != nil
+}
+
+// currentStyle merges the stored style stack into templatingtypes.RichTextStyle
+// which can be applied on rich text elements.
+func (r *nodeRenderer) currentStyle() *templatingtypes.RichTextStyle {
+	s := templatingtypes.RichTextStyle{}
+	for _, f := range r.styleStack {
+		s.Bold = s.Bold || f.Bold
+		s.Italic = s.Italic || f.Italic
+		s.Strike = s.Strike || f.Strike
+		s.Code = s.Code || f.Code
+	}
+	if s == (templatingtypes.RichTextStyle{}) {
+		return nil
+	}
+	return &s
+}
+
+// flushMrkdwn collects markdown text and adds it as a templatingtypes.SectionBlock with mrkdwn text
+// whenever starting a new block we flush markdown to render it as a separate block.
+func (r *nodeRenderer) flushMrkdwn() {
+	text := strings.TrimSpace(r.mrkdwn.String())
+	if text != "" {
+		r.blocks = append(r.blocks, templatingtypes.SectionBlock{
+			Type: "section",
+			Text: &templatingtypes.TextObject{
+				Type: "mrkdwn",
+				Text: text,
+			},
+		})
+	}
+	r.mrkdwn.Reset()
+}
+
+// addInline adds an inline element to the appropriate context.
+func (r *nodeRenderer) addInline(el interface{}) {
+	if r.listCtx != nil {
+		r.listCtx.currentItemInlines = append(r.listCtx.currentItemInlines, el)
+	} else if r.tableCtx != nil {
+		r.tableCtx.currentCellInlines = append(r.tableCtx.currentCellInlines, el)
+	}
+}
+
+// --- Document ---
+
+func (r *nodeRenderer) renderDocument(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		r.blocks = nil
+		r.mrkdwn.Reset()
+		r.styleStack = nil
+		r.listCtx = nil
+		r.tableCtx = nil
+		r.blockquoteDepth = 0
+	} else {
+		// on exiting the document node write the json for the collected blocks.
+		r.flushMrkdwn()
+		var data []byte
+		var err error
+		if len(r.blocks) > 0 {
+			data, err = json.Marshal(r.blocks)
+			if err != nil {
+				return ast.WalkStop, err
+			}
+		} else {
+			// if no blocks are collected, write an empty array.
+			data = []byte("[]")
+		}
+		_, err = w.Write(data)
+		if err != nil {
+			return ast.WalkStop, err
+		}
+	}
+	return ast.WalkContinue, nil
+}
+
+// --- Heading ---
+
+func (r *nodeRenderer) renderHeading(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		r.mrkdwn.WriteString("*")
+	} else {
+		r.mrkdwn.WriteString("*\n")
+	}
+	return ast.WalkContinue, nil
+}
+
+// --- Paragraph ---
+
+func (r *nodeRenderer) renderParagraph(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		if r.mrkdwn.Len() > 0 {
+			text := r.mrkdwn.String()
+			if !strings.HasSuffix(text, "\n") {
+				r.mrkdwn.WriteString("\n")
+			}
+		}
+		// handling of nested blockquotes
+		if r.blockquoteDepth > 0 {
+			r.mrkdwn.WriteString(strings.Repeat("> ", r.blockquoteDepth))
+		}
+	}
+	return ast.WalkContinue, nil
+}
+
+// --- ThematicBreak ---
+
+func (r *nodeRenderer) renderThematicBreak(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		r.flushMrkdwn()
+		r.blocks = append(r.blocks, templatingtypes.DividerBlock{Type: "divider"})
+	}
+	return ast.WalkContinue, nil
+}
+
+// --- CodeBlock (indented) ---
+
+func (r *nodeRenderer) renderCodeBlock(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if !entering {
+		return ast.WalkContinue, nil
+	}
+	r.flushMrkdwn()
+
+	var buf bytes.Buffer
+	lines := node.Lines()
+	for i := 0; i < lines.Len(); i++ {
+		line := lines.At(i)
+		buf.Write(line.Value(source))
+	}
+
+	text := buf.String()
+	// Remove trailing newline
+	text = strings.TrimRight(text, "\n")
+	// Slack API rejects empty text in rich_text_preformatted elements
+	if text == "" {
+		text = " "
+	}
+
+	elements := []interface{}{
+		templatingtypes.RichTextInline{Type: "text", Text: text},
+	}
+
+	r.blocks = append(r.blocks, templatingtypes.RichTextBlock{
+		Type: "rich_text",
+		Elements: []interface{}{
+			templatingtypes.RichTextPreformatted{
+				Type:     "rich_text_preformatted",
+				Elements: elements,
+				Border:   0,
+			},
+		},
+	})
+	return ast.WalkContinue, nil
+}
+
+// --- FencedCodeBlock ---
+
+func (r *nodeRenderer) renderFencedCodeBlock(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if !entering {
+		return ast.WalkContinue, nil
+	}
+	r.flushMrkdwn()
+
+	n := node.(*ast.FencedCodeBlock)
+	var buf bytes.Buffer
+	lines := node.Lines()
+	for i := 0; i < lines.Len(); i++ {
+		line := lines.At(i)
+		buf.Write(line.Value(source))
+	}
+
+	text := buf.String()
+	text = strings.TrimRight(text, "\n")
+	// Slack API rejects empty text in rich_text_preformatted elements
+	if text == "" {
+		text = " "
+	}
+
+	elements := []interface{}{
+		templatingtypes.RichTextInline{Type: "text", Text: text},
+	}
+
+	// If language is specified, collect it.
+	var language string
+	lang := n.Language(source)
+	if len(lang) > 0 {
+		language = string(lang)
+	}
+	// Add the preformatted block to the blocks slice with the collected language.
+	r.blocks = append(r.blocks, templatingtypes.RichTextBlock{
+		Type: "rich_text",
+		Elements: []interface{}{
+			templatingtypes.RichTextPreformatted{
+				Type:     "rich_text_preformatted",
+				Elements: elements,
+				Border:   0,
+				Language: language,
+			},
+		},
+	})
+
+	return ast.WalkSkipChildren, nil
+}
+
+// --- Blockquote ---
+
+func (r *nodeRenderer) renderBlockquote(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		r.blockquoteDepth++
+	} else {
+		r.blockquoteDepth--
+	}
+	return ast.WalkContinue, nil
+}
+
+// --- List ---
+
+func (r *nodeRenderer) renderList(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	list := node.(*ast.List)
+
+	if entering {
+		style := "bullet"
+		if list.IsOrdered() {
+			style = "ordered"
+		}
+
+		if r.listCtx == nil {
+			// Top-level list: flush mrkdwn and create context
+			r.flushMrkdwn()
+			r.listCtx = &listContext{}
+		} else {
+			// Nested list: check if we already have some collected list items that needs to be flushed.
+			// in slack blockkit, list items with different levels of indentation are added as different rich_text_list blocks.
+			if len(r.listCtx.currentItemInlines) > 0 {
+				sec := templatingtypes.RichTextBlock{
+					Type:     "rich_text_section",
+					Elements: r.listCtx.currentItemInlines,
+				}
+				if r.listCtx.current != nil {
+					r.listCtx.current.Elements = append(r.listCtx.current.Elements, sec)
+				}
+				r.listCtx.currentItemInlines = nil
+				// Increment parent's itemCount
+				if len(r.listCtx.stack) > 0 {
+					r.listCtx.stack[len(r.listCtx.stack)-1].itemCount++
+				}
+			}
+			// Finalize current list to result only if items were collected
+			if r.listCtx.current != nil && len(r.listCtx.current.Elements) > 0 {
+				r.listCtx.result = append(r.listCtx.result, *r.listCtx.current)
+			}
+		}
+
+		// the stack accumulated till this level derives hte indentation
+		// the stack get's collected as we go in more nested levels of list
+		// and as we get our of the nesting we remove the items from the slack
+		indent := len(r.listCtx.stack)
+		r.listCtx.stack = append(r.listCtx.stack, listFrame{
+			style:     style,
+			indent:    indent,
+			itemCount: 0,
+		})
+
+		newList := &templatingtypes.RichTextList{
+			Type:     "rich_text_list",
+			Style:    style,
+			Indent:   indent,
+			Border:   0,
+			Elements: []interface{}{},
+		}
+
+		// Handle ordered list with start > 1
+		if list.IsOrdered() && list.Start > 1 {
+			newList.Offset = list.Start - 1
+		}
+
+		r.listCtx.current = newList
+
+	} else {
+		// Leaving list: finalize current list
+		if r.listCtx.current != nil && len(r.listCtx.current.Elements) > 0 {
+			r.listCtx.result = append(r.listCtx.result, *r.listCtx.current)
+		}
+
+		// Pop stack to so upcoming indentations can be handled correctly.
+		r.listCtx.stack = r.listCtx.stack[:len(r.listCtx.stack)-1]
+
+		if len(r.listCtx.stack) > 0 {
+			// Resume parent: start a new list segment at parent indent/style
+			parent := &r.listCtx.stack[len(r.listCtx.stack)-1]
+			newList := &templatingtypes.RichTextList{
+				Type:     "rich_text_list",
+				Style:    parent.style,
+				Indent:   parent.indent,
+				Border:   0,
+				Elements: []interface{}{},
+			}
+			// Set offset for ordered parent continuation
+			if parent.style == "ordered" && parent.itemCount > 0 {
+				newList.Offset = parent.itemCount
+			}
+			r.listCtx.current = newList
+		} else {
+			// Top-level list is done since all stack are popped: build templatingtypes.RichTextBlock if non-empty
+			if len(r.listCtx.result) > 0 {
+				elements := make([]interface{}, len(r.listCtx.result))
+				for i, l := range r.listCtx.result {
+					elements[i] = l
+				}
+				r.blocks = append(r.blocks, templatingtypes.RichTextBlock{
+					Type:     "rich_text",
+					Elements: elements,
+				})
+			}
+			r.listCtx = nil
+		}
+	}
+
+	return ast.WalkContinue, nil
+}
+
+// --- ListItem ---
+
+func (r *nodeRenderer) renderListItem(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		r.listCtx.currentItemInlines = nil
+	} else {
+		// Only add if there are inlines (might be empty after nested list consumed them)
+		if len(r.listCtx.currentItemInlines) > 0 {
+			sec := templatingtypes.RichTextBlock{
+				Type:     "rich_text_section",
+				Elements: r.listCtx.currentItemInlines,
+			}
+			if r.listCtx.current != nil {
+				r.listCtx.current.Elements = append(r.listCtx.current.Elements, sec)
+			}
+			r.listCtx.currentItemInlines = nil
+			// Increment parent frame's itemCount
+			if len(r.listCtx.stack) > 0 {
+				r.listCtx.stack[len(r.listCtx.stack)-1].itemCount++
+			}
+		}
+	}
+
+	return ast.WalkContinue, nil
+}
+
+// --- Table ---
+// when table is encountered, we flush the markdown and create a table context.
+// when header row is encountered, we set the isHeader flag to true
+// when each row ends in renderTableRow we add that row to rows array of table context.
+// when table cell is encountered, we apply header related styles to the collected inline items,
+// all inline items are parsed as separate AST items like list item, links, text, etc. are collected
+// using the addInline function and wrapped in a rich_text_section block.
+
+func (r *nodeRenderer) renderTable(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		r.flushMrkdwn()
+		r.tableCtx = &tableContext{}
+	} else {
+		// Pad short rows to match header column count for valid Block Kit payload
+		// without this slack blockkit attachment is invalid and the API fails
+		rows := r.tableCtx.rows
+		if len(rows) > 0 {
+			maxCols := len(rows[0])
+			for i, row := range rows {
+				for len(row) < maxCols {
+					emptySec := templatingtypes.RichTextBlock{
+						Type:     "rich_text_section",
+						Elements: []interface{}{templatingtypes.RichTextInline{Type: "text", Text: " "}},
+					}
+					row = append(row, templatingtypes.TableCell{
+						Type:     "rich_text",
+						Elements: []interface{}{emptySec},
+					})
+				}
+				rows[i] = row
+			}
+		}
+		r.blocks = append(r.blocks, templatingtypes.TableBlock{
+			Type: "table",
+			Rows: rows,
+		})
+		r.tableCtx = nil
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderTableHeader(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		r.tableCtx.isHeader = true
+		r.tableCtx.currentRow = nil
+	} else {
+		r.tableCtx.rows = append(r.tableCtx.rows, r.tableCtx.currentRow)
+		r.tableCtx.currentRow = nil
+		r.tableCtx.isHeader = false
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderTableRow(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		r.tableCtx.currentRow = nil
+	} else {
+		r.tableCtx.rows = append(r.tableCtx.rows, r.tableCtx.currentRow)
+		r.tableCtx.currentRow = nil
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderTableCell(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		r.tableCtx.currentCellInlines = nil
+	} else {
+		// If header, make text bold for the collected inline items.
+		if r.tableCtx.isHeader {
+			for i, el := range r.tableCtx.currentCellInlines {
+				if inline, ok := el.(templatingtypes.RichTextInline); ok {
+					if inline.Style == nil {
+						inline.Style = &templatingtypes.RichTextStyle{Bold: true}
+					} else {
+						inline.Style.Bold = true
+					}
+					r.tableCtx.currentCellInlines[i] = inline
+				}
+			}
+		}
+		// Ensure cell has at least one element for valid Block Kit payload
+		if len(r.tableCtx.currentCellInlines) == 0 {
+			r.tableCtx.currentCellInlines = []interface{}{
+				templatingtypes.RichTextInline{Type: "text", Text: " "},
+			}
+		}
+		// All inline items that are collected for a table cell are wrapped in a rich_text_section block.
+		sec := templatingtypes.RichTextBlock{
+			Type:     "rich_text_section",
+			Elements: r.tableCtx.currentCellInlines,
+		}
+		// The rich_text_section block is wrapped in a rich_text block.
+		cell := templatingtypes.TableCell{
+			Type:     "rich_text",
+			Elements: []interface{}{sec},
+		}
+		r.tableCtx.currentRow = append(r.tableCtx.currentRow, cell)
+		r.tableCtx.currentCellInlines = nil
+	}
+	return ast.WalkContinue, nil
+}
+
+// --- TaskCheckBox ---
+
+func (r *nodeRenderer) renderTaskCheckBox(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if !entering {
+		return ast.WalkContinue, nil
+	}
+	n := node.(*extensionast.TaskCheckBox)
+	text := "[ ] "
+	if n.IsChecked {
+		text = "[x] "
+	}
+	if r.inRichTextMode() {
+		r.addInline(templatingtypes.RichTextInline{Type: "text", Text: text})
+	} else {
+		r.mrkdwn.WriteString(text)
+	}
+	return ast.WalkContinue, nil
+}
+
+// --- Inline: Text ---
+
+func (r *nodeRenderer) renderText(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if !entering {
+		return ast.WalkContinue, nil
+	}
+	n := node.(*ast.Text)
+	value := string(n.Segment.Value(source))
+
+	if r.inRichTextMode() {
+		r.addInline(templatingtypes.RichTextInline{
+			Type:  "text",
+			Text:  value,
+			Style: r.currentStyle(),
+		})
+		if n.HardLineBreak() || n.SoftLineBreak() {
+			r.addInline(templatingtypes.RichTextInline{Type: "text", Text: "\n"})
+		}
+	} else {
+		r.mrkdwn.WriteString(value)
+		if n.HardLineBreak() || n.SoftLineBreak() {
+			r.mrkdwn.WriteString("\n")
+			if r.blockquoteDepth > 0 {
+				r.mrkdwn.WriteString(strings.Repeat("> ", r.blockquoteDepth))
+			}
+		}
+	}
+	return ast.WalkContinue, nil
+}
+
+// --- Inline: Emphasis ---
+
+func (r *nodeRenderer) renderEmphasis(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	n := node.(*ast.Emphasis)
+	if r.inRichTextMode() {
+		if entering {
+			s := templatingtypes.RichTextStyle{}
+			if n.Level == 1 {
+				s.Italic = true
+			} else {
+				s.Bold = true
+			}
+			r.styleStack = append(r.styleStack, s)
+		} else {
+			// the collected style gets used by the rich text element using currentStyle()
+			// so we remove this style from the stack.
+			if len(r.styleStack) > 0 {
+				r.styleStack = r.styleStack[:len(r.styleStack)-1]
+			}
+		}
+	} else {
+		if n.Level == 1 {
+			r.mrkdwn.WriteString("_")
+		} else {
+			r.mrkdwn.WriteString("*")
+		}
+	}
+	return ast.WalkContinue, nil
+}
+
+// --- Inline: Strikethrough ---
+
+func (r *nodeRenderer) renderStrikethrough(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if r.inRichTextMode() {
+		if entering {
+			r.styleStack = append(r.styleStack, templatingtypes.RichTextStyle{Strike: true})
+		} else {
+			// the collected style gets used by the rich text element using currentStyle()
+			// so we remove this style from the stack.
+			if len(r.styleStack) > 0 {
+				r.styleStack = r.styleStack[:len(r.styleStack)-1]
+			}
+		}
+	} else {
+		r.mrkdwn.WriteString("~")
+	}
+	return ast.WalkContinue, nil
+}
+
+// --- Inline: CodeSpan ---
+
+func (r *nodeRenderer) renderCodeSpan(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if !entering {
+		return ast.WalkContinue, nil
+	}
+	if r.inRichTextMode() {
+		// Collect all child text
+		var buf bytes.Buffer
+		for c := node.FirstChild(); c != nil; c = c.NextSibling() {
+			if t, ok := c.(*ast.Text); ok {
+				v := t.Segment.Value(source)
+				if bytes.HasSuffix(v, []byte("\n")) {
+					buf.Write(v[:len(v)-1])
+					buf.WriteByte(' ')
+				} else {
+					buf.Write(v)
+				}
+			} else if s, ok := c.(*ast.String); ok {
+				buf.Write(s.Value)
+			}
+		}
+		style := r.currentStyle()
+		if style == nil {
+			style = &templatingtypes.RichTextStyle{Code: true}
+		} else {
+			style.Code = true
+		}
+		r.addInline(templatingtypes.RichTextInline{
+			Type:  "text",
+			Text:  buf.String(),
+			Style: style,
+		})
+		return ast.WalkSkipChildren, nil
+	}
+	// mrkdwn mode
+	r.mrkdwn.WriteByte('`')
+	for c := node.FirstChild(); c != nil; c = c.NextSibling() {
+		if t, ok := c.(*ast.Text); ok {
+			v := t.Segment.Value(source)
+			if bytes.HasSuffix(v, []byte("\n")) {
+				r.mrkdwn.Write(v[:len(v)-1])
+				r.mrkdwn.WriteByte(' ')
+			} else {
+				r.mrkdwn.Write(v)
+			}
+		} else if s, ok := c.(*ast.String); ok {
+			r.mrkdwn.Write(s.Value)
+		}
+	}
+	r.mrkdwn.WriteByte('`')
+	return ast.WalkSkipChildren, nil
+}
+
+// --- Inline: Link ---
+
+func (r *nodeRenderer) renderLink(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	n := node.(*ast.Link)
+	if r.inRichTextMode() {
+		if entering {
+			// Walk the entire subtree to collect text from all descendants,
+			// including nested inline nodes like emphasis, strong, code spans, etc.
+			var buf bytes.Buffer
+			_ = ast.Walk(node, func(child ast.Node, entering bool) (ast.WalkStatus, error) {
+				if !entering || child == node {
+					return ast.WalkContinue, nil
+				}
+				if t, ok := child.(*ast.Text); ok {
+					buf.Write(t.Segment.Value(source))
+				} else if s, ok := child.(*ast.String); ok {
+					buf.Write(s.Value)
+				}
+				return ast.WalkContinue, nil
+			})
+			// Once we've collected the text for the link (given it was present)
+			// let's add the link to the rich text block.
+			r.addInline(templatingtypes.RichTextLink{
+				Type:  "link",
+				URL:   string(n.Destination),
+				Text:  buf.String(),
+				Style: r.currentStyle(),
+			})
+			return ast.WalkSkipChildren, nil
+		}
+	} else {
+		if entering {
+			r.mrkdwn.WriteString("<")
+			r.mrkdwn.Write(n.Destination)
+			r.mrkdwn.WriteString("|")
+		} else {
+			r.mrkdwn.WriteString(">")
+		}
+	}
+	return ast.WalkContinue, nil
+}
+
+// --- Image (skip) ---
+
+func (r *nodeRenderer) renderImage(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	return ast.WalkSkipChildren, nil
+}

pkg/templating/markdownrenderer/blockkit/blockkit_test.go

@@ -0,0 +1,542 @@
+package blockkit
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/yuin/goldmark"
+)
+
+func jsonEqual(a, b string) bool {
+	var va, vb interface{}
+	if err := json.Unmarshal([]byte(a), &va); err != nil {
+		return false
+	}
+	if err := json.Unmarshal([]byte(b), &vb); err != nil {
+		return false
+	}
+	ja, _ := json.Marshal(va)
+	jb, _ := json.Marshal(vb)
+	return string(ja) == string(jb)
+}
+
+func prettyJSON(s string) string {
+	var v interface{}
+	if err := json.Unmarshal([]byte(s), &v); err != nil {
+		return s
+	}
+	b, _ := json.MarshalIndent(v, "", "  ")
+	return string(b)
+}
+
+func TestRenderer(t *testing.T) {
+	tests := []struct {
+		name     string
+		markdown string
+		expected string
+	}{
+		{
+			name:     "empty input",
+			markdown: "",
+			expected: `[]`,
+		},
+		{
+			name:     "simple paragraph",
+			markdown: "Hello world",
+			expected: `[
+				{
+					"type": "section",
+					"text": { "type": "mrkdwn", "text": "Hello world" }
+				}
+			]`,
+		},
+		{
+			name:     "heading",
+			markdown: "# My Heading",
+			expected: `[
+				{
+					"type": "section",
+					"text": { "type": "mrkdwn", "text": "*My Heading*" }
+				}
+			]`,
+		},
+		{
+			name:     "multiple paragraphs",
+			markdown: "First paragraph\n\nSecond paragraph",
+			expected: `[
+				{
+					"type": "section",
+					"text": { "type": "mrkdwn", "text": "First paragraph\nSecond paragraph" }
+				}
+			]`,
+		},
+		{
+			name:     "todo list ",
+			markdown: "- [ ] item 1\n- [x] item 2",
+			expected: `[
+				{
+					"type": "rich_text",
+					"elements": [
+					{ 
+						"border": 0, 
+						"elements": [ 
+							{ "elements": [ { "text": "[ ] ", "type": "text" }, { "text": "item 1", "type": "text" } ], "type": "rich_text_section" }, 
+							{ "elements": [ { "text": "[x] ", "type": "text" }, { "text": "item 2", "type": "text" } ], "type": "rich_text_section" } 
+						],
+						"indent": 0, 
+						"style": "bullet", 
+						"type": "rich_text_list" 
+						}
+					]
+				}
+			]`,
+		},
+		{
+			name:     "thematic break between paragraphs",
+			markdown: "Before\n\n---\n\nAfter",
+			expected: `[
+				{ "type": "section", "text": { "type": "mrkdwn", "text": "Before" } },
+				{ "type": "divider" },
+				{ "type": "section", "text": { "type": "mrkdwn", "text": "After" } }
+			]`,
+		},
+		{
+			name:     "fenced code block with language",
+			markdown: "```go\nfmt.Println(\"hello\")\n```",
+			expected: `[
+				{
+					"type": "rich_text",
+					"elements": [
+						{
+							"type": "rich_text_preformatted",
+							"border": 0,
+							"language": "go",
+							"elements": [
+								{ "type": "text", "text": "fmt.Println(\"hello\")" }
+							]
+						}
+					]
+				}
+			]`,
+		},
+		{
+			name:     "indented code block",
+			markdown: "    code line 1\n    code line 2",
+			expected: `[
+				{
+					"type": "rich_text",
+					"elements": [
+						{
+							"type": "rich_text_preformatted",
+							"border": 0,
+							"elements": [
+								{ "type": "text", "text": "code line 1\ncode line 2" }
+							]
+						}
+					]
+				}
+			]`,
+		},
+		{
+			name:     "empty fenced code block",
+			markdown: "```\n```",
+			expected: `[
+				{
+					"type": "rich_text",
+					"elements": [
+						{
+							"type": "rich_text_preformatted",
+							"border": 0,
+							"elements": [
+								{ "type": "text", "text": " " }
+							]
+						}
+					]
+				}
+			]`,
+		},
+		{
+			name:     "simple bullet list",
+			markdown: "- item 1\n- item 2\n- item 3",
+			expected: `[
+				{
+					"type": "rich_text",
+					"elements": [
+						{
+							"type": "rich_text_list", "style": "bullet", "indent": 0, "border": 0,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "item 1" }] },
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "item 2" }] },
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "item 3" }] }
+							]
+						}
+					]
+				}
+			]`,
+		},
+		{
+			name:     "simple ordered list",
+			markdown: "1. first\n2. second\n3. third",
+			expected: `[
+				{
+					"type": "rich_text",
+					"elements": [
+						{
+							"type": "rich_text_list", "style": "ordered", "indent": 0, "border": 0,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "first" }] },
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "second" }] },
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "third" }] }
+							]
+						}
+					]
+				}
+			]`,
+		},
+		{
+			name:     "nested bullet list (2 levels)",
+			markdown: "- item 1\n- item 2\n  - sub a\n  - sub b\n- item 3",
+			expected: `[
+				{
+					"type": "rich_text",
+					"elements": [
+						{
+							"type": "rich_text_list", "style": "bullet", "indent": 0, "border": 0,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "item 1" }] },
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "item 2" }] }
+							]
+						},
+						{
+							"type": "rich_text_list", "style": "bullet", "indent": 1, "border": 0,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "sub a" }] },
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "sub b" }] }
+							]
+						},
+						{
+							"type": "rich_text_list", "style": "bullet", "indent": 0, "border": 0,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "item 3" }] }
+							]
+						}
+					]
+				}
+			]`,
+		},
+		{
+			name:     "nested ordered list with offset",
+			markdown: "1. first\n   1. nested-a\n   2. nested-b\n2. second\n3. third",
+			expected: `[
+				{
+					"type": "rich_text",
+					"elements": [
+						{
+							"type": "rich_text_list", "style": "ordered", "indent": 0, "border": 0,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "first" }] }
+							]
+						},
+						{
+							"type": "rich_text_list", "style": "ordered", "indent": 1, "border": 0,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "nested-a" }] },
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "nested-b" }] }
+							]
+						},
+						{
+							"type": "rich_text_list", "style": "ordered", "indent": 0, "border": 0, "offset": 1,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "second" }] },
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "third" }] }
+							]
+						}
+					]
+				}
+			]`,
+		},
+		{
+			name:     "mixed ordered/bullet nesting",
+			markdown: "1. ordered\n   - bullet child\n2. ordered again",
+			expected: `[
+				{
+					"type": "rich_text",
+					"elements": [
+						{
+							"type": "rich_text_list", "style": "ordered", "indent": 0, "border": 0,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "ordered" }] }
+							]
+						},
+						{
+							"type": "rich_text_list", "style": "bullet", "indent": 1, "border": 0,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "bullet child" }] }
+							]
+						},
+						{
+							"type": "rich_text_list", "style": "ordered", "indent": 0, "border": 0, "offset": 1,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "ordered again" }] }
+							]
+						}
+					]
+				}
+			]`,
+		},
+		{
+			name:     "list items with bold/italic/link/code",
+			markdown: "- **bold item**\n- _italic item_\n- [link](http://example.com)\n- `code item`",
+			expected: `[
+				{
+					"type": "rich_text",
+					"elements": [
+						{
+							"type": "rich_text_list", "style": "bullet", "indent": 0, "border": 0,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "bold item", "style": { "bold": true } }] },
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "italic item", "style": { "italic": true } }] },
+								{ "type": "rich_text_section", "elements": [{ "type": "link", "url": "http://example.com", "text": "link" }] },
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "code item", "style": { "code": true } }] }
+							]
+						}
+					]
+				}
+			]`,
+		},
+		{
+			name:     "table with header and body",
+			markdown: "| Name | Age |\n|------|-----|\n| Alice | 30 |",
+			expected: `[
+				{
+					"type": "table",
+					"rows": [
+						[
+							{ "type": "rich_text", "elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "Name", "style": { "bold": true } }] }
+							]},
+							{ "type": "rich_text", "elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "Age", "style": { "bold": true } }] }
+							]}
+						],
+						[
+							{ "type": "rich_text", "elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "Alice" }] }
+							]},
+							{ "type": "rich_text", "elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "30" }] }
+							]}
+						]
+					]
+				}
+			]`,
+		},
+		{
+			name:     "blockquote",
+			markdown: "> quoted text",
+			expected: `[
+				{
+					"type": "section",
+					"text": { "type": "mrkdwn", "text": "> quoted text" }
+				}
+			]`,
+		},
+		{
+			name:     "blockquote with nested list",
+			markdown: "> item 1\n> > item 2\n> > item 3",
+			expected: `[
+				{
+					"text": {
+					"text": "> item 1\n> > item 2\n> > item 3",
+					"type": "mrkdwn"
+					},
+					"type": "section"
+				}
+			]`,
+		},
+		{
+			name:     "inline formatting in paragraph",
+			markdown: "This is **bold** and _italic_ and ~strike~ and `code`",
+			expected: `[
+				{
+					"type": "section",
+					"text": { "type": "mrkdwn", "text": "This is *bold* and _italic_ and ~strike~ and ` + "`code`" + `" }
+				}
+			]`,
+		},
+		{
+			name:     "link in paragraph",
+			markdown: "Visit [Google](http://google.com)",
+			expected: `[
+				{
+					"type": "section",
+					"text": { "type": "mrkdwn", "text": "Visit <http://google.com|Google>" }
+				}
+			]`,
+		},
+		{
+			name:     "image is skipped",
+			markdown: "![alt](http://example.com/image.png)",
+			// For image skip the block and return empty array
+			expected: `[]`,
+		},
+		{
+			name:     "paragraph then list then paragraph",
+			markdown: "Before\n\n- item\n\nAfter",
+			expected: `[
+				{ "type": "section", "text": { "type": "mrkdwn", "text": "Before" } },
+				{
+					"type": "rich_text",
+					"elements": [
+						{
+							"type": "rich_text_list", "style": "bullet", "indent": 0, "border": 0,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "item" }] }
+							]
+						}
+					]
+				},
+				{ "type": "section", "text": { "type": "mrkdwn", "text": "After" } }
+			]`,
+		},
+		{
+			name:     "ordered list with start > 1",
+			markdown: "5. fifth\n6. sixth",
+			expected: `[
+				{
+					"type": "rich_text",
+					"elements": [
+						{
+							"type": "rich_text_list", "style": "ordered", "indent": 0, "border": 0, "offset": 4,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "fifth" }] },
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "sixth" }] }
+							]
+						}
+					]
+				}
+			]`,
+		},
+		{
+			name:     "deeply nested ordered list (3 levels) with offsets",
+			markdown: "1. Some things\n\t1. are best left\n2. to the fate\n\t1. of the world\n\t\t1. and then\n\t\t2. this is how\n3. it turns out to be",
+			expected: `[
+				{
+					"type": "rich_text",
+					"elements": [
+						{ "type": "rich_text_list", "style": "ordered", "indent": 0, "border": 0,
+						  "elements": [{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "Some things" }] }] },
+
+						{ "type": "rich_text_list", "style": "ordered", "indent": 1, "border": 0,
+						  "elements": [{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "are best left" }] }] },
+
+						{ "type": "rich_text_list", "style": "ordered", "indent": 0, "border": 0, "offset": 1,
+						  "elements": [{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "to the fate" }] }] },
+
+						{ "type": "rich_text_list", "style": "ordered", "indent": 1, "border": 0,
+						  "elements": [{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "of the world" }] }] },
+
+						{ "type": "rich_text_list", "style": "ordered", "indent": 2, "border": 0,
+						  "elements": [
+						    { "type": "rich_text_section", "elements": [{ "type": "text", "text": "and then" }] },
+						    { "type": "rich_text_section", "elements": [{ "type": "text", "text": "this is how" }] }
+						  ]
+						},
+
+						{ "type": "rich_text_list", "style": "ordered", "indent": 0, "border": 0, "offset": 2,
+						  "elements": [{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "it turns out to be" }] }] }
+					]
+				}
+			]`,
+		},
+		{
+			name:     "link with bold label in list item",
+			markdown: "- [**docs**](http://example.com)",
+			expected: `[
+				{
+					"type": "rich_text",
+					"elements": [
+						{
+							"type": "rich_text_list", "style": "bullet", "indent": 0, "border": 0,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "link", "url": "http://example.com", "text": "docs" }] }
+							]
+						}
+					]
+				}
+			]`,
+		},
+		{
+			name:     "table with empty cell",
+			markdown: "| A | B |\n|---|---|\n| 1 | |",
+			expected: `[
+				{
+					"type": "table",
+					"rows": [
+						[
+							{ "type": "rich_text", "elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "A", "style": { "bold": true } }] }
+							]},
+							{ "type": "rich_text", "elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "B", "style": { "bold": true } }] }
+							]}
+						],
+						[
+							{ "type": "rich_text", "elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "1" }] }
+							]},
+							{ "type": "rich_text", "elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": " " }] }
+							]}
+						]
+					]
+				}
+			]`,
+		},
+		{
+			name:     "table with missing column in row",
+			markdown: "| A | B |\n|---|---|\n| 1 |",
+			expected: `[
+				{
+					"type": "table",
+					"rows": [
+						[
+							{ "type": "rich_text", "elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "A", "style": { "bold": true } }] }
+							]},
+							{ "type": "rich_text", "elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "B", "style": { "bold": true } }] }
+							]}
+						],
+						[
+							{ "type": "rich_text", "elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": "1" }] }
+							]},
+							{ "type": "rich_text", "elements": [
+								{ "type": "rich_text_section", "elements": [{ "type": "text", "text": " " }] }
+							]}
+						]
+					]
+				}
+			]`,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			md := goldmark.New(
+				goldmark.WithExtensions(Extender),
+			)
+			var buf bytes.Buffer
+			if err := md.Convert([]byte(tt.markdown), &buf); err != nil {
+				t.Fatalf("convert error: %v", err)
+			}
+			got := buf.String()
+			if !jsonEqual(got, tt.expected) {
+				t.Errorf("JSON mismatch\n\nMarkdown:\n%s\n\nExpected:\n%s\n\nGot:\n%s",
+					tt.markdown, prettyJSON(tt.expected), prettyJSON(got))
+			}
+		})
+	}
+}

pkg/templating/markdownrenderer/blockkit/doc.go

@@ -0,0 +1,9 @@
+// Package blockkit provides a goldmark extension that renders markdown as
+// Slack Block Kit JSON (an array of blocks suitable for the Slack API's
+// `blocks` payload field).
+//
+// The current Slack notifier uses the sibling mrkdwn package instead, because
+// Block Kit's hard limits (one table per message, 50 blocks per message,
+// 12k-character total text) would silently truncate or reject notifications
+// with rich bodies. This package is kept in tree for future use.
+package blockkit

pkg/templating/markdownrenderer/concurrency_test.go

@@ -0,0 +1,47 @@
+package markdownrenderer
+
+import (
+	"sync"
+	"testing"
+)
+
+// TestConcurrentRender exercises every render entry point from many
+// goroutines. Run with `go test -race` to catch shared-state regressions
+// in the HTML, Block Kit or mrkdwn paths.
+func TestConcurrentRender(t *testing.T) {
+	const goroutines = 32
+	const iterations = 20
+
+	markdowns := []string{
+		"# Heading\n\nparagraph **bold** *em* `code`",
+		"- item 1\n- item 2\n  - nested\n- item 3",
+		"| a | b |\n| - | - |\n| 1 | 2 |\n| 3 | 4 |",
+		"> quote\n>> nested quote",
+		"```go\npackage main\n```",
+		"[link](https://example.com) and ![img](https://example.com/i.png)",
+	}
+
+	renderers := map[string]func(string) (string, error){
+		"html":     RenderHTML,
+		"blockkit": RenderSlackBlockKit,
+		"mrkdwn":   RenderSlackMrkdwn,
+	}
+
+	var wg sync.WaitGroup
+	for name, render := range renderers {
+		for g := 0; g < goroutines; g++ {
+			wg.Add(1)
+			go func(name string, render func(string) (string, error), g int) {
+				defer wg.Done()
+				for i := 0; i < iterations; i++ {
+					md := markdowns[(g+i)%len(markdowns)]
+					if _, err := render(md); err != nil {
+						t.Errorf("%s render failed: %v", name, err)
+						return
+					}
+				}
+			}(name, render, g)
+		}
+	}
+	wg.Wait()
+}

pkg/templating/markdownrenderer/doc.go

@@ -0,0 +1,3 @@
+// Package markdownrenderer renders markdown to the formats that alert
+// notifications are delivered in: HTML, Slack Block Kit JSON, and Slack mrkdwn.
+package markdownrenderer

pkg/templating/markdownrenderer/html_test.go

@@ -0,0 +1,166 @@
+package markdownrenderer
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+var testMarkdown = `# 🔥 FIRING: High CPU Usage on api-gateway
+
+https://signoz.example.com/alerts/123
+https://runbooks.example.com/cpu-high
+
+## Alert Details
+
+**Status:** **FIRING** | *api-gateway* service is experiencing high CPU usage. ~~resolved~~ previously.
+
+Alert triggered because ` + "`cpu_usage_percent`" + ` exceeded threshold ` + "`90`" + `.
+
+[View Alert in SigNoz](https://signoz.example.com/alerts/123) | [View Logs](https://signoz.example.com/logs?service=api-gateway) | [View Traces](https://signoz.example.com/traces?service=api-gateway)
+
+![critical](https://signoz.example.com/badges/critical.svg "Critical Alert")
+
+## Alert Labels
+
+| Label    | Value       |
+| -------- | ----------- |
+| service  | api-gateway |
+| instance | pod-5a8b3c  |
+| severity | critical    |
+| region   | us-east-1   |
+
+## Remediation Steps
+
+1. Check current CPU usage on the pod
+2. Review recent deployments for regressions
+3. Scale horizontally if load-related
+    1. Increase replica count
+    2. Verify HPA configuration
+
+## Affected Services
+
+* api-gateway
+* auth-service
+* payment-service
+    * payment-processor
+    * payment-validator
+
+## Incident Checklist
+
+- [x] Alert acknowledged
+- [x] On-call notified
+- [ ] Root cause identified
+- [ ] Fix deployed
+
+## Alert Rule Description
+
+> This alert fires when CPU usage exceeds 90% for more than 5 minutes on any pod in the api-gateway service.
+>
+>> For capacity planning guidelines, see the infrastructure runbook section on horizontal pod autoscaling.
+
+## Triggered Query
+` + "```promql\navg(rate(container_cpu_usage_seconds_total{service=\"api-gateway\"}[5m])) by (pod) > 0.9\n```" + `
+
+## Inline Details
+
+This alert was generated by SigNoz using ` + "`alertmanager`" + ` rules engine.
+`
+
+func TestRenderHTML_Composite(t *testing.T) {
+	html, err := RenderHTML(testMarkdown)
+	require.NoError(t, err)
+
+	expected := "<h1>🔥 FIRING: High CPU Usage on api-gateway</h1>\n" +
+		"<p><a href=\"https://signoz.example.com/alerts/123\">https://signoz.example.com/alerts/123</a>\n<a href=\"https://runbooks.example.com/cpu-high\">https://runbooks.example.com/cpu-high</a></p>\n" +
+		"<h2>Alert Details</h2>\n" +
+		"<p><strong>Status:</strong> <strong>FIRING</strong> | <em>api-gateway</em> service is experiencing high CPU usage. <del>resolved</del> previously.</p>\n" +
+		"<p>Alert triggered because <code>cpu_usage_percent</code> exceeded threshold <code>90</code>.</p>\n" +
+		"<p><a href=\"https://signoz.example.com/alerts/123\">View Alert in SigNoz</a> | <a href=\"https://signoz.example.com/logs?service=api-gateway\">View Logs</a> | <a href=\"https://signoz.example.com/traces?service=api-gateway\">View Traces</a></p>\n" +
+		"<p><img src=\"https://signoz.example.com/badges/critical.svg\" alt=\"critical\" title=\"Critical Alert\"></p>\n" +
+		"<h2>Alert Labels</h2>\n" +
+		"<table>\n<thead>\n<tr>\n<th>Label</th>\n<th>Value</th>\n</tr>\n</thead>\n" +
+		"<tbody>\n<tr>\n<td>service</td>\n<td>api-gateway</td>\n</tr>\n" +
+		"<tr>\n<td>instance</td>\n<td>pod-5a8b3c</td>\n</tr>\n" +
+		"<tr>\n<td>severity</td>\n<td>critical</td>\n</tr>\n" +
+		"<tr>\n<td>region</td>\n<td>us-east-1</td>\n</tr>\n</tbody>\n</table>\n" +
+		"<h2>Remediation Steps</h2>\n" +
+		"<ol>\n<li>Check current CPU usage on the pod</li>\n<li>Review recent deployments for regressions</li>\n<li>Scale horizontally if load-related\n" +
+		"<ol>\n<li>Increase replica count</li>\n<li>Verify HPA configuration</li>\n</ol>\n</li>\n</ol>\n" +
+		"<h2>Affected Services</h2>\n" +
+		"<ul>\n<li>api-gateway</li>\n<li>auth-service</li>\n<li>payment-service\n" +
+		"<ul>\n<li>payment-processor</li>\n<li>payment-validator</li>\n</ul>\n</li>\n</ul>\n" +
+		"<h2>Incident Checklist</h2>\n" +
+		"<ul>\n<li><input checked=\"\" disabled=\"\" type=\"checkbox\"> Alert acknowledged</li>\n" +
+		"<li><input checked=\"\" disabled=\"\" type=\"checkbox\"> On-call notified</li>\n" +
+		"<li><input disabled=\"\" type=\"checkbox\"> Root cause identified</li>\n" +
+		"<li><input disabled=\"\" type=\"checkbox\"> Fix deployed</li>\n</ul>\n" +
+		"<h2>Alert Rule Description</h2>\n" +
+		"<blockquote>\n<p>This alert fires when CPU usage exceeds 90% for more than 5 minutes on any pod in the api-gateway service.</p>\n" +
+		"<blockquote>\n<p>For capacity planning guidelines, see the infrastructure runbook section on horizontal pod autoscaling.</p>\n</blockquote>\n</blockquote>\n" +
+		"<h2>Triggered Query</h2>\n" +
+		"<pre><code class=\"language-promql\">avg(rate(container_cpu_usage_seconds_total{service=&quot;api-gateway&quot;}[5m])) by (pod) &gt; 0.9\n</code></pre>\n" +
+		"<h2>Inline Details</h2>\n" +
+		"<p>This alert was generated by SigNoz using <code>alertmanager</code> rules engine.</p>\n"
+
+	assert.Equal(t, expected, html)
+}
+
+func TestRenderHTML_InlineFormatting(t *testing.T) {
+	input := `# 🔥 FIRING: High CPU on api-gateway
+## Alert Status
+
+**FIRING** alert for *api-gateway* service — ~~resolved~~ previously.
+
+Metric ` + "`cpu_usage_percent`" + ` exceeded threshold. [View in SigNoz](https://signoz.example.com/alerts/123)
+
+![critical](https://signoz.example.com/badges/critical.svg "Critical Alert")`
+
+	html, err := RenderHTML(input)
+	require.NoError(t, err)
+
+	expected := "<h1>🔥 FIRING: High CPU on api-gateway</h1>\n<h2>Alert Status</h2>\n" +
+		"<p><strong>FIRING</strong> alert for <em>api-gateway</em> service — <del>resolved</del> previously.</p>\n" +
+		"<p>Metric <code>cpu_usage_percent</code> exceeded threshold. <a href=\"https://signoz.example.com/alerts/123\">View in SigNoz</a></p>\n" +
+		"<p><img src=\"https://signoz.example.com/badges/critical.svg\" alt=\"critical\" title=\"Critical Alert\"></p>\n"
+
+	assert.Equal(t, expected, html)
+}
+
+func TestRenderHTML_BlockElements(t *testing.T) {
+	input := `1. Check CPU usage on the pod
+2. Review recent deployments
+3. Scale horizontally if needed
+
+* api-gateway
+* auth-service
+* payment-service
+
+- [x] Alert acknowledged
+- [ ] Root cause identified
+
+> This alert fires when CPU usage exceeds 90% for more than 5 minutes.
+
+| Label    | Value       |
+| -------- | ----------- |
+| service  | api-gateway |
+| severity | <no value>    |
+
+` + "```promql\navg(rate(container_cpu_usage_seconds_total{service=\"api-gateway\"}[5m])) by (pod) > 0.9\n```"
+
+	html, err := RenderHTML(input)
+	require.NoError(t, err)
+
+	expected := "<ol>\n<li>Check CPU usage on the pod</li>\n<li>Review recent deployments</li>\n<li>Scale horizontally if needed</li>\n</ol>\n" +
+		"<ul>\n<li>api-gateway</li>\n<li>auth-service</li>\n<li>payment-service</li>\n</ul>\n" +
+		"<ul>\n<li><input checked=\"\" disabled=\"\" type=\"checkbox\"> Alert acknowledged</li>\n" +
+		"<li><input disabled=\"\" type=\"checkbox\"> Root cause identified</li>\n</ul>\n" +
+		"<blockquote>\n<p>This alert fires when CPU usage exceeds 90% for more than 5 minutes.</p>\n</blockquote>\n" +
+		"<table>\n<thead>\n<tr>\n<th>Label</th>\n<th>Value</th>\n</tr>\n</thead>\n" +
+		"<tbody>\n<tr>\n<td>service</td>\n<td>api-gateway</td>\n</tr>\n" +
+		"<tr>\n<td>severity</td>\n<td>&lt;no value&gt;</td>\n</tr>\n</tbody>\n</table>\n" +
+		"<pre><code class=\"language-promql\">avg(rate(container_cpu_usage_seconds_total{service=&quot;api-gateway&quot;}[5m])) by (pod) &gt; 0.9\n</code></pre>\n"
+
+	assert.Equal(t, expected, html)
+}

pkg/templating/markdownrenderer/markdownrenderer.go

@@ -0,0 +1,62 @@
+package markdownrenderer
+
+import (
+	"bytes"
+	"sync"
+
+	"github.com/SigNoz/signoz/pkg/errors"
+	"github.com/SigNoz/signoz/pkg/templating/markdownrenderer/blockkit"
+	"github.com/SigNoz/signoz/pkg/templating/markdownrenderer/mrkdwn"
+	"github.com/yuin/goldmark"
+	"github.com/yuin/goldmark/extension"
+)
+
+// htmlRenderer is built once and shared. Goldmark's built-in HTML path and
+// the novalue extension carry no mutable state, so a single goldmark.Markdown
+// is safe to Convert concurrently.
+var htmlRenderer = goldmark.New(goldmark.WithExtensions(extension.GFM, escapeNoValue))
+
+// The Slack renderers hold per-document state on the node renderer (list
+// context, table context, style stack, blockquote/list prefixes). Two
+// goroutines calling Convert on the same goldmark.Markdown would corrupt
+// that state. A sync.Pool gives each concurrent caller its own instance
+// while still amortising the cost of building the pipeline.
+var (
+	blockkitPool = sync.Pool{
+		New: func() any {
+			return goldmark.New(goldmark.WithExtensions(blockkit.Extender))
+		},
+	}
+	mrkdwnPool = sync.Pool{
+		New: func() any {
+			return goldmark.New(goldmark.WithExtensions(mrkdwn.Extender))
+		},
+	}
+)
+
+// RenderHTML converts markdown to HTML.
+func RenderHTML(markdown string) (string, error) {
+	return render(htmlRenderer, markdown, "HTML")
+}
+
+// RenderSlackBlockKit converts markdown to a Slack Block Kit JSON array.
+func RenderSlackBlockKit(markdown string) (string, error) {
+	md := blockkitPool.Get().(goldmark.Markdown)
+	defer blockkitPool.Put(md)
+	return render(md, markdown, "Slack Block Kit")
+}
+
+// RenderSlackMrkdwn converts markdown to Slack's mrkdwn format.
+func RenderSlackMrkdwn(markdown string) (string, error) {
+	md := mrkdwnPool.Get().(goldmark.Markdown)
+	defer mrkdwnPool.Put(md)
+	return render(md, markdown, "Slack mrkdwn")
+}
+
+func render(md goldmark.Markdown, markdown string, format string) (string, error) {
+	var buf bytes.Buffer
+	if err := md.Convert([]byte(markdown), &buf); err != nil {
+		return "", errors.WrapInternalf(err, errors.CodeInternal, "failed to convert markdown to %s", format)
+	}
+	return buf.String(), nil
+}

pkg/templating/markdownrenderer/mrkdwn/doc.go

@@ -0,0 +1,4 @@
+// Package mrkdwn provides a goldmark extension that renders markdown as
+// Slack's "mrkdwn" text format (the legacy text field used in attachments
+// and message payloads).
+package mrkdwn

pkg/templating/markdownrenderer/mrkdwn/mrkdwn.go

@@ -0,0 +1,404 @@
+package mrkdwn
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+	"unicode/utf8"
+
+	"github.com/yuin/goldmark"
+	"github.com/yuin/goldmark/ast"
+	"github.com/yuin/goldmark/extension"
+	extensionast "github.com/yuin/goldmark/extension/ast"
+	"github.com/yuin/goldmark/renderer"
+	"github.com/yuin/goldmark/util"
+)
+
+// Extender is a goldmark.Extender that registers the Slack mrkdwn node
+// renderer together with the GFM extensions it relies on (tables,
+// strikethrough).
+var Extender goldmark.Extender = &extender{}
+
+type extender struct{}
+
+func (e *extender) Extend(m goldmark.Markdown) {
+	extension.Table.Extend(m)
+	extension.Strikethrough.Extend(m)
+	m.Renderer().AddOptions(
+		renderer.WithNodeRenderers(util.Prioritized(newRenderer(), 1)),
+	)
+}
+
+// nodeRenderer renders nodes as Slack mrkdwn.
+type nodeRenderer struct {
+	prefixes []string
+}
+
+func newRenderer() renderer.NodeRenderer {
+	return &nodeRenderer{}
+}
+
+// RegisterFuncs implements NodeRenderer.RegisterFuncs.
+func (r *nodeRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
+	// Blocks
+	reg.Register(ast.KindDocument, r.renderDocument)
+	reg.Register(ast.KindHeading, r.renderHeading)
+	reg.Register(ast.KindBlockquote, r.renderBlockquote)
+	reg.Register(ast.KindCodeBlock, r.renderCodeBlock)
+	reg.Register(ast.KindFencedCodeBlock, r.renderCodeBlock)
+	reg.Register(ast.KindList, r.renderList)
+	reg.Register(ast.KindListItem, r.renderListItem)
+	reg.Register(ast.KindParagraph, r.renderParagraph)
+	reg.Register(ast.KindTextBlock, r.renderTextBlock)
+	reg.Register(ast.KindRawHTML, r.renderRawHTML)
+	reg.Register(ast.KindThematicBreak, r.renderThematicBreak)
+
+	// Inlines
+	reg.Register(ast.KindAutoLink, r.renderAutoLink)
+	reg.Register(ast.KindCodeSpan, r.renderCodeSpan)
+	reg.Register(ast.KindEmphasis, r.renderEmphasis)
+	reg.Register(ast.KindImage, r.renderImage)
+	reg.Register(ast.KindLink, r.renderLink)
+	reg.Register(ast.KindText, r.renderText)
+
+	// Extensions
+	reg.Register(extensionast.KindStrikethrough, r.renderStrikethrough)
+	reg.Register(extensionast.KindTable, r.renderTable)
+}
+
+func (r *nodeRenderer) writePrefix(w util.BufWriter) {
+	for _, p := range r.prefixes {
+		_, _ = w.WriteString(p)
+	}
+}
+
+// writeLineSeparator writes a newline followed by the current prefix.
+// Used for tight separations (e.g., between list items or text blocks).
+func (r *nodeRenderer) writeLineSeparator(w util.BufWriter) {
+	_ = w.WriteByte('\n')
+	r.writePrefix(w)
+}
+
+// writeBlockSeparator writes a blank line separator between block-level elements,
+// respecting any active prefixes for proper nesting (e.g., inside blockquotes).
+func (r *nodeRenderer) writeBlockSeparator(w util.BufWriter) {
+	r.writeLineSeparator(w)
+	r.writeLineSeparator(w)
+}
+
+// separateFromPrevious writes a block separator if the node has a previous sibling.
+func (r *nodeRenderer) separateFromPrevious(w util.BufWriter, n ast.Node) {
+	if n.PreviousSibling() != nil {
+		r.writeBlockSeparator(w)
+	}
+}
+
+func (r *nodeRenderer) renderDocument(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		// The renderer is pooled, so wipe any prefix stack left over from a
+		// prior document (e.g. one that errored mid-walk and left push/pop
+		// unbalanced) before starting a fresh convert.
+		r.prefixes = r.prefixes[:0]
+	} else {
+		_, _ = w.WriteString("\n\n")
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderHeading(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		r.separateFromPrevious(w, node)
+	}
+	_, _ = w.WriteString("*")
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderBlockquote(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		r.separateFromPrevious(w, n)
+		r.prefixes = append(r.prefixes, "> ")
+		_, _ = w.WriteString("> ")
+	} else {
+		r.prefixes = r.prefixes[:len(r.prefixes)-1]
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderCodeBlock(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		r.separateFromPrevious(w, n)
+		// start code block and write code line by line
+		_, _ = w.WriteString("```\n")
+		l := n.Lines().Len()
+		for i := 0; i < l; i++ {
+			line := n.Lines().At(i)
+			v := line.Value(source)
+			_, _ = w.Write(v)
+		}
+	} else {
+		_, _ = w.WriteString("```")
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderList(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		if node.PreviousSibling() != nil {
+			r.writeLineSeparator(w)
+			// another line break if not a nested list item and starting another block
+			if node.Parent() == nil || node.Parent().Kind() != ast.KindListItem {
+				r.writeLineSeparator(w)
+			}
+		}
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderListItem(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		if n.PreviousSibling() != nil {
+			r.writeLineSeparator(w)
+		}
+		parent := n.Parent().(*ast.List)
+		// compute and write the prefix based on list type and index
+		var prefixStr string
+		if parent.IsOrdered() {
+			index := parent.Start
+			for c := parent.FirstChild(); c != nil && c != n; c = c.NextSibling() {
+				index++
+			}
+			prefixStr = fmt.Sprintf("%d. ", index)
+		} else {
+			prefixStr = "• "
+		}
+		_, _ = w.WriteString(prefixStr)
+		r.prefixes = append(r.prefixes, "\t") // add tab for nested list items
+	} else {
+		r.prefixes = r.prefixes[:len(r.prefixes)-1]
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderParagraph(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		r.separateFromPrevious(w, n)
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderTextBlock(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering && n.PreviousSibling() != nil {
+		r.writeLineSeparator(w)
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderRawHTML(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		n := n.(*ast.RawHTML)
+		l := n.Segments.Len()
+		for i := 0; i < l; i++ {
+			segment := n.Segments.At(i)
+			_, _ = w.Write(segment.Value(source))
+		}
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderThematicBreak(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		r.separateFromPrevious(w, n)
+		_, _ = w.WriteString("---")
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderAutoLink(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if !entering {
+		return ast.WalkContinue, nil
+	}
+	n := node.(*ast.AutoLink)
+	url := string(n.URL(source))
+	label := string(n.Label(source))
+
+	if n.AutoLinkType == ast.AutoLinkEmail && !strings.HasPrefix(strings.ToLower(url), "mailto:") {
+		url = "mailto:" + url
+	}
+
+	if url == label {
+		_, _ = fmt.Fprintf(w, "<%s>", url)
+	} else {
+		_, _ = fmt.Fprintf(w, "<%s|%s>", url, label)
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderCodeSpan(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
+	if entering {
+		_ = w.WriteByte('`')
+		for c := n.FirstChild(); c != nil; c = c.NextSibling() {
+			segment := c.(*ast.Text).Segment
+			value := segment.Value(source)
+			if bytes.HasSuffix(value, []byte("\n")) { // replace newline with space
+				_, _ = w.Write(value[:len(value)-1])
+				_ = w.WriteByte(' ')
+			} else {
+				_, _ = w.Write(value)
+			}
+		}
+		return ast.WalkSkipChildren, nil
+	}
+	_ = w.WriteByte('`')
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderEmphasis(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	n := node.(*ast.Emphasis)
+	mark := "_"
+	if n.Level == 2 {
+		mark = "*"
+	}
+	_, _ = w.WriteString(mark)
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderLink(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	n := node.(*ast.Link)
+	if entering {
+		_, _ = w.WriteString("<")
+		_, _ = w.Write(util.URLEscape(n.Destination, true))
+		_, _ = w.WriteString("|")
+	} else {
+		_, _ = w.WriteString(">")
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderImage(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if !entering {
+		return ast.WalkContinue, nil
+	}
+	n := node.(*ast.Image)
+	_, _ = w.WriteString("<")
+	_, _ = w.Write(util.URLEscape(n.Destination, true))
+	_, _ = w.WriteString("|")
+
+	// Write the alt text directly
+	var altBuf bytes.Buffer
+	for c := n.FirstChild(); c != nil; c = c.NextSibling() {
+		if textNode, ok := c.(*ast.Text); ok {
+			altBuf.Write(textNode.Segment.Value(source))
+		}
+	}
+	_, _ = w.Write(altBuf.Bytes())
+
+	_, _ = w.WriteString(">")
+	return ast.WalkSkipChildren, nil
+}
+
+func (r *nodeRenderer) renderText(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if !entering {
+		return ast.WalkContinue, nil
+	}
+	n := node.(*ast.Text)
+	segment := n.Segment
+	value := segment.Value(source)
+	_, _ = w.Write(value)
+	if n.HardLineBreak() || n.SoftLineBreak() {
+		r.writeLineSeparator(w)
+	}
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderStrikethrough(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	_, _ = w.WriteString("~")
+	return ast.WalkContinue, nil
+}
+
+func (r *nodeRenderer) renderTable(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if !entering {
+		return ast.WalkContinue, nil
+	}
+
+	r.separateFromPrevious(w, node)
+
+	// Collect cells and max widths
+	var rows [][]string
+	var colWidths []int
+
+	for c := node.FirstChild(); c != nil; c = c.NextSibling() {
+		if c.Kind() == extensionast.KindTableHeader || c.Kind() == extensionast.KindTableRow {
+			var row []string
+			colIdx := 0
+			for cc := c.FirstChild(); cc != nil; cc = cc.NextSibling() {
+				if cc.Kind() == extensionast.KindTableCell {
+					cellText := extractPlainText(cc, source)
+					row = append(row, cellText)
+					runeLen := utf8.RuneCountInString(cellText)
+					if colIdx >= len(colWidths) {
+						colWidths = append(colWidths, runeLen)
+					} else if runeLen > colWidths[colIdx] {
+						colWidths[colIdx] = runeLen
+					}
+					colIdx++
+				}
+			}
+			rows = append(rows, row)
+		}
+	}
+
+	// writing table in code block
+	_, _ = w.WriteString("```\n")
+	for i, row := range rows {
+		for colIdx, cellText := range row {
+			width := 0
+			if colIdx < len(colWidths) {
+				width = colWidths[colIdx]
+			}
+			runeLen := utf8.RuneCountInString(cellText)
+			padding := max(0, width-runeLen)
+
+			_, _ = w.WriteString(cellText)
+			_, _ = w.WriteString(strings.Repeat(" ", padding))
+			if colIdx < len(row)-1 {
+				_, _ = w.WriteString(" | ")
+			}
+		}
+		_ = w.WriteByte('\n')
+
+		// Print separator after header
+		if i == 0 {
+			for colIdx := range row {
+				width := 0
+				if colIdx < len(colWidths) {
+					width = colWidths[colIdx]
+				}
+				_, _ = w.WriteString(strings.Repeat("-", width))
+				if colIdx < len(row)-1 {
+					_, _ = w.WriteString("-|-")
+				}
+			}
+			_ = w.WriteByte('\n')
+		}
+	}
+	_, _ = w.WriteString("```")
+
+	return ast.WalkSkipChildren, nil
+}
+
+// extractPlainText extracts all the text content from the given node.
+func extractPlainText(n ast.Node, source []byte) string {
+	var buf bytes.Buffer
+	_ = ast.Walk(n, func(node ast.Node, entering bool) (ast.WalkStatus, error) {
+		if !entering {
+			return ast.WalkContinue, nil
+		}
+		if textNode, ok := node.(*ast.Text); ok {
+			buf.Write(textNode.Segment.Value(source))
+		} else if strNode, ok := node.(*ast.String); ok {
+			buf.Write(strNode.Value)
+		}
+		return ast.WalkContinue, nil
+	})
+	return strings.TrimSpace(buf.String())
+}

pkg/templating/markdownrenderer/mrkdwn/mrkdwn_test.go

@@ -0,0 +1,115 @@
+package mrkdwn
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/yuin/goldmark"
+)
+
+func TestRenderer(t *testing.T) {
+	tests := []struct {
+		name     string
+		markdown string
+		expected string
+	}{
+		{
+			name:     "Heading with Thematic Break",
+			markdown: "# Title 1\n# Hello World\n---\nthis is sometext",
+			expected: "*Title 1*\n\n*Hello World*\n\n---\n\nthis is sometext\n\n",
+		},
+		{
+			name:     "Blockquote",
+			markdown: "> This is a quote\n> It continues",
+			expected: "> This is a quote\n> It continues\n\n",
+		},
+		{
+			name:     "Fenced Code Block",
+			markdown: "```go\npackage main\nfunc main() {}\n```",
+			expected: "```\npackage main\nfunc main() {}\n```\n\n",
+		},
+		{
+			name:     "Unordered List",
+			markdown: "- item 1\n- item 2\n- item 3",
+			expected: "• item 1\n• item 2\n• item 3\n\n",
+		},
+		{
+			name:     "nested unordered list",
+			markdown: "- item 1\n- item 2\n\t- item 2.1\n\t\t- item 2.1.1\n\t\t- item 2.1.2\n\t- item 2.2\n- item 3",
+			expected: "• item 1\n• item 2\n\t• item 2.1\n\t\t• item 2.1.1\n\t\t• item 2.1.2\n\t• item 2.2\n• item 3\n\n",
+		},
+		{
+			name:     "Ordered List",
+			markdown: "1. item 1\n2. item 2\n3. item 3",
+			expected: "1. item 1\n2. item 2\n3. item 3\n\n",
+		},
+		{
+			name:     "nested ordered list",
+			markdown: "1. item 1\n2. item 2\n\t1. item 2.1\n\t\t1. item 2.1.1\n\t\t2. item 2.1.2\n\t2. item 2.2\n\t3. item 2.3\n3. item 3\n4. item 4",
+			expected: "1. item 1\n2. item 2\n\t1. item 2.1\n\t\t1. item 2.1.1\n\t\t2. item 2.1.2\n\t2. item 2.2\n\t3. item 2.3\n3. item 3\n4. item 4\n\n",
+		},
+		{
+			name:     "Links and AutoLinks",
+			markdown: "This is a [link](https://example.com) and an autolink <https://test.com>",
+			expected: "This is a <https://example.com|link> and an autolink <https://test.com>\n\n",
+		},
+		{
+			name:     "Images",
+			markdown: "An image ![alt text](https://example.com/image.png)",
+			expected: "An image <https://example.com/image.png|alt text>\n\n",
+		},
+		{
+			name:     "Emphasis",
+			markdown: "This is **bold** and *italic* and __bold__ and _italic_",
+			expected: "This is *bold* and _italic_ and *bold* and _italic_\n\n",
+		},
+		{
+			name:     "Strikethrough",
+			markdown: "This is ~~strike~~",
+			expected: "This is ~strike~\n\n",
+		},
+		{
+			name:     "Code Span",
+			markdown: "This is `inline code` embedded.",
+			expected: "This is `inline code` embedded.\n\n",
+		},
+		{
+			name:     "Table",
+			markdown: "Col 1 | Col 2 | Col 3\n--- | --- | ---\nVal 1 | Long Value 2 | 3\nShort | V | 1000",
+			expected: "```\nCol 1 | Col 2        | Col 3\n------|--------------|------\nVal 1 | Long Value 2 | 3    \nShort | V            | 1000 \n```\n\n",
+		},
+		{
+			name:     "Mixed Nested Lists",
+			markdown: "1. first\n\t- nested bullet\n\t- another bullet\n2. second",
+			expected: "1. first\n\t• nested bullet\n\t• another bullet\n2. second\n\n",
+		},
+		{
+			name:     "Email AutoLink",
+			markdown: "<user@example.com>",
+			expected: "<mailto:user@example.com|user@example.com>\n\n",
+		},
+		{
+			name:     "No value string parsed as is",
+			markdown: "Service: <no value>",
+			expected: "Service: <no value>\n\n",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			md := goldmark.New(goldmark.WithExtensions(Extender))
+
+			var buf bytes.Buffer
+			if err := md.Convert([]byte(tt.markdown), &buf); err != nil {
+				t.Fatalf("failed to convert: %v", err)
+			}
+
+			// Do exact string matching
+			actual := buf.String()
+			if actual != tt.expected {
+				t.Errorf("\nExpected:\n%q\nGot:\n%q\nRaw Expected:\n%s\nRaw Got:\n%s",
+					tt.expected, actual, tt.expected, actual)
+			}
+		})
+	}
+}

pkg/templating/markdownrenderer/novalue.go

@@ -0,0 +1,61 @@
+package markdownrenderer
+
+import (
+	"github.com/yuin/goldmark"
+	gast "github.com/yuin/goldmark/ast"
+	"github.com/yuin/goldmark/renderer"
+	"github.com/yuin/goldmark/renderer/html"
+	"github.com/yuin/goldmark/util"
+)
+
+// Go text/template writes the literal string "<no value>" when a referenced
+// key is missing. The default goldmark HTML path treats it as raw HTML and
+// drops it, hiding the missing value. This renderer escapes it so operators
+// can see which variable was unset in the rendered notification.
+type noValueHTMLRenderer struct {
+	html.Config
+}
+
+func newNoValueHTMLRenderer(opts ...html.Option) renderer.NodeRenderer {
+	r := &noValueHTMLRenderer{Config: html.NewConfig()}
+	for _, opt := range opts {
+		opt.SetHTMLOption(&r.Config)
+	}
+	return r
+}
+
+func (r *noValueHTMLRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
+	reg.Register(gast.KindRawHTML, r.renderRawHTML)
+}
+
+func (r *noValueHTMLRenderer) renderRawHTML(w util.BufWriter, source []byte, node gast.Node, entering bool) (gast.WalkStatus, error) {
+	if !entering {
+		return gast.WalkSkipChildren, nil
+	}
+	n := node.(*gast.RawHTML)
+	if r.Unsafe {
+		for i := 0; i < n.Segments.Len(); i++ {
+			segment := n.Segments.At(i)
+			_, _ = w.Write(segment.Value(source))
+		}
+		return gast.WalkSkipChildren, nil
+	}
+	if string(n.Segments.Value(source)) == "<no value>" {
+		_, _ = w.WriteString("&lt;no value&gt;")
+		return gast.WalkSkipChildren, nil
+	}
+	_, _ = w.WriteString("<!-- raw HTML omitted -->")
+	return gast.WalkSkipChildren, nil
+}
+
+type escapeNoValueExtension struct{}
+
+// escapeNoValue renders the literal `<no value>` produced by Go's text/template
+// as visible escaped text instead of dropping it as raw HTML.
+var escapeNoValue = &escapeNoValueExtension{}
+
+func (e *escapeNoValueExtension) Extend(m goldmark.Markdown) {
+	m.Renderer().AddOptions(renderer.WithNodeRenderers(
+		util.Prioritized(newNoValueHTMLRenderer(), 500),
+	))
+}

pkg/templating/markdownrenderer/novalue_test.go

@@ -0,0 +1,66 @@
+package markdownrenderer
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/yuin/goldmark"
+	"github.com/yuin/goldmark/extension"
+)
+
+func TestEscapeNoValue(t *testing.T) {
+	tests := []struct {
+		name     string
+		markdown string
+		expected string
+	}{
+		{
+			name:     "plain text",
+			markdown: "Service: <no value>",
+			expected: "<p>Service: &lt;no value&gt;</p>\n",
+		},
+		{
+			name:     "inside strong",
+			markdown: "Service: **<no value>**",
+			expected: "<p>Service: <strong>&lt;no value&gt;</strong></p>\n",
+		},
+		{
+			name:     "inside emphasis",
+			markdown: "Service: *<no value>*",
+			expected: "<p>Service: <em>&lt;no value&gt;</em></p>\n",
+		},
+		{
+			name:     "inside strikethrough",
+			markdown: "Service: ~~<no value>~~",
+			expected: "<p>Service: <del>&lt;no value&gt;</del></p>\n",
+		},
+		{
+			name:     "real html still omitted",
+			markdown: "hello <div>world</div>",
+			expected: "<p>hello <!-- raw HTML omitted -->world<!-- raw HTML omitted --></p>\n",
+		},
+		{
+			name:     "inside heading",
+			markdown: "# Title <no value>",
+			expected: "<h1>Title &lt;no value&gt;</h1>\n",
+		},
+		{
+			name:     "inside list item",
+			markdown: "- item <no value>",
+			expected: "<ul>\n<li>item &lt;no value&gt;</li>\n</ul>\n",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gm := goldmark.New(goldmark.WithExtensions(escapeNoValue, extension.Strikethrough))
+			var buf bytes.Buffer
+			if err := gm.Convert([]byte(tt.markdown), &buf); err != nil {
+				t.Fatal(err)
+			}
+			if buf.String() != tt.expected {
+				t.Errorf("expected:\n%s\ngot:\n%s", tt.expected, buf.String())
+			}
+		})
+	}
+}

pkg/templating/markdownrenderer/slack_test.go

@@ -0,0 +1,145 @@
+package markdownrenderer
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func jsonEqual(a, b string) bool {
+	var va, vb any
+	if err := json.Unmarshal([]byte(a), &va); err != nil {
+		return false
+	}
+	if err := json.Unmarshal([]byte(b), &vb); err != nil {
+		return false
+	}
+	ja, _ := json.Marshal(va)
+	jb, _ := json.Marshal(vb)
+	return string(ja) == string(jb)
+}
+
+func prettyJSON(s string) string {
+	var v any
+	if err := json.Unmarshal([]byte(s), &v); err != nil {
+		return s
+	}
+	b, _ := json.MarshalIndent(v, "", "  ")
+	return string(b)
+}
+
+func TestRenderSlackBlockKit(t *testing.T) {
+	tests := []struct {
+		name     string
+		markdown string
+		expected string
+	}{
+		{
+			name:     "simple paragraph",
+			markdown: "Hello world",
+			expected: `[
+				{
+					"type": "section",
+					"text": { "type": "mrkdwn", "text": "Hello world" }
+				}
+			]`,
+		},
+		{
+			name: "alert-themed with heading, list, and code block",
+			markdown: `# Alert Triggered
+
+- Service: **checkout-api**
+- Status: _critical_
+
+` + "```" + `
+error: connection timeout after 30s
+` + "```",
+			expected: `[
+				{
+					"type": "section",
+					"text": { "type": "mrkdwn", "text": "*Alert Triggered*" }
+				},
+				{
+					"type": "rich_text",
+					"elements": [
+						{
+							"type": "rich_text_list", "style": "bullet", "indent": 0, "border": 0,
+							"elements": [
+								{ "type": "rich_text_section", "elements": [
+									{ "type": "text", "text": "Service: " },
+									{ "type": "text", "text": "checkout-api", "style": { "bold": true } }
+								]},
+								{ "type": "rich_text_section", "elements": [
+									{ "type": "text", "text": "Status: " },
+									{ "type": "text", "text": "critical", "style": { "italic": true } }
+								]}
+							]
+						}
+					]
+				},
+				{
+					"type": "rich_text",
+					"elements": [
+						{
+							"type": "rich_text_preformatted",
+							"border": 0,
+							"elements": [
+								{ "type": "text", "text": "error: connection timeout after 30s" }
+							]
+						}
+					]
+				}
+			]`,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := RenderSlackBlockKit(tt.markdown)
+			if err != nil {
+				t.Fatalf("Render error: %v", err)
+			}
+
+			if !json.Valid([]byte(got)) {
+				t.Fatalf("output is not valid JSON:\n%s", got)
+			}
+
+			if !jsonEqual(got, tt.expected) {
+				t.Errorf("JSON mismatch\n\nMarkdown:\n%s\n\nExpected:\n%s\n\nGot:\n%s",
+					tt.markdown, prettyJSON(tt.expected), prettyJSON(got))
+			}
+		})
+	}
+}
+
+func TestRenderSlackMrkdwn(t *testing.T) {
+	markdown := `# Alert Triggered
+
+- Service: **checkout-api**
+- Status: _critical_
+- Dashboard: [View Dashboard](https://example.com/dashboard)
+
+| Metric | Value | Threshold |
+| --- | --- | --- |
+| Latency | 250ms | 100ms |
+| Error Rate | 5.2% | 1% |
+
+` + "```" + `
+error: connection timeout after 30s
+` + "```"
+
+	expected := "*Alert Triggered*\n\n" +
+		"• Service: *checkout-api*\n" +
+		"• Status: _critical_\n" +
+		"• Dashboard: <https://example.com/dashboard|View Dashboard>\n\n" +
+		"```\nMetric     | Value | Threshold\n-----------|-------|----------\nLatency    | 250ms | 100ms    \nError Rate | 5.2%  | 1%       \n```\n\n" +
+		"```\nerror: connection timeout after 30s\n```\n\n"
+
+	got, err := RenderSlackMrkdwn(markdown)
+	if err != nil {
+		t.Fatalf("Render error: %v", err)
+	}
+
+	if got != expected {
+		t.Errorf("mrkdwn mismatch\n\nExpected:\n%q\n\nGot:\n%q", expected, got)
+	}
+}

pkg/types/templatingtypes/templatingtypes.go

@@ -0,0 +1,83 @@
+// Package templatingtypes holds the data types produced by the markdown
+// renderers under pkg/templating (e.g. Slack Block Kit JSON DTOs).
+package templatingtypes
+
+// SectionBlock represents a Slack section block with mrkdwn text.
+type SectionBlock struct {
+	Type string      `json:"type"`
+	Text *TextObject `json:"text"`
+}
+
+// DividerBlock represents a Slack divider block.
+type DividerBlock struct {
+	Type string `json:"type"`
+}
+
+// RichTextBlock is a container for rich text elements (lists, code blocks,
+// table and cell blocks).
+type RichTextBlock struct {
+	Type     string `json:"type"`
+	Elements []any  `json:"elements"`
+}
+
+// TableBlock represents a Slack table rendered as a rich_text block with
+// preformatted text.
+type TableBlock struct {
+	Type string        `json:"type"`
+	Rows [][]TableCell `json:"rows"`
+}
+
+// TableCell is a cell in a TableBlock.
+type TableCell struct {
+	Type     string `json:"type"`
+	Elements []any  `json:"elements"`
+}
+
+// TextObject is the text field inside a SectionBlock.
+type TextObject struct {
+	Type string `json:"type"`
+	Text string `json:"text"`
+}
+
+// RichTextList represents an ordered or unordered list.
+type RichTextList struct {
+	Type     string `json:"type"`
+	Style    string `json:"style"`
+	Indent   int    `json:"indent"`
+	Border   int    `json:"border"`
+	Offset   int    `json:"offset,omitempty"`
+	Elements []any  `json:"elements"`
+}
+
+// RichTextPreformatted represents a code block.
+type RichTextPreformatted struct {
+	Type     string `json:"type"`
+	Elements []any  `json:"elements"`
+	Border   int    `json:"border"`
+	Language string `json:"language,omitempty"`
+}
+
+// RichTextInline represents inline text with optional styling, e.g. text
+// inside a list or a table cell.
+type RichTextInline struct {
+	Type  string         `json:"type"`
+	Text  string         `json:"text"`
+	Style *RichTextStyle `json:"style,omitempty"`
+}
+
+// RichTextLink represents a link inside rich text, e.g. a link inside a list
+// or a table cell.
+type RichTextLink struct {
+	Type  string         `json:"type"`
+	URL   string         `json:"url"`
+	Text  string         `json:"text,omitempty"`
+	Style *RichTextStyle `json:"style,omitempty"`
+}
+
+// RichTextStyle toggles inline styling on a rich-text element.
+type RichTextStyle struct {
+	Bold   bool `json:"bold,omitempty"`
+	Italic bool `json:"italic,omitempty"`
+	Strike bool `json:"strike,omitempty"`
+	Code   bool `json:"code,omitempty"`
+}