diff --git a/packages/klipper/package.json b/packages/klipper/package.json
index 424fe1e..b1e1721 100644
--- a/packages/klipper/package.json
+++ b/packages/klipper/package.json
@@ -53,6 +53,7 @@
 		]
 	},
 	"activationEvents": [
-		"onLanguage:klipper-cfg"
+		"onLanguage:klipper-cfg",
+		"onLanguage:klipper-gcode"
 	]
 }
diff --git a/packages/klipper/src/app/documentSymbols.ts b/packages/klipper/src/app/documentSymbols.ts
new file mode 100644
index 0000000..7fc37af
--- /dev/null
+++ b/packages/klipper/src/app/documentSymbols.ts
@@ -0,0 +1,233 @@
+import {
+	CancellationToken,
+	DocumentSymbol,
+	DocumentSymbolProvider,
+	Position,
+	Range,
+	SymbolKind,
+	TextDocument,
+} from "vscode";
+
+type SymbolCandidate = {
+	name: string;
+	detail: string;
+	kind: SymbolKind;
+	line: number;
+	selectionRange: Range;
+};
+
+const CFG_SECTION_RE = /^\s*\[([^\]]+)\]/;
+const CFG_SECTION_KINDS: Record<string, SymbolKind> = {
+	gcode_macro: SymbolKind.Function,
+	delayed_gcode: SymbolKind.Event,
+	gcode_shell_command: SymbolKind.Function,
+	display_template: SymbolKind.Function,
+	include: SymbolKind.File,
+	menu: SymbolKind.Namespace,
+};
+
+const GCODE_HEADING_RE = /^\s*;+\s*(.+)$/;
+// Ignore slicer metadata that would spam the outline.
+const GCODE_HEADING_IGNORE_KEYS = new Set([
+	"FLAVOR",
+	"TIME",
+	"MINX",
+	"MINY",
+	"MINZ",
+	"MAXX",
+	"MAXY",
+	"MAXZ",
+	"LAYER_COUNT",
+	"LAYER",
+	"TYPE",
+	"MESH",
+	"FILAMENT",
+	"MATERIAL",
+	"NOZZLE",
+	"BED",
+	"GENERATED",
+	"SLICER",
+	"BUILD_VOLUME",
+]);
+
+function buildSymbols(
+	document: TextDocument,
+	candidates: SymbolCandidate[],
+): DocumentSymbol[] {
+	const lastLine = Math.max(document.lineCount - 1, 0);
+
+	return candidates.map((candidate, index) => {
+		const nextLine =
+			index + 1 < candidates.length ? candidates[index + 1].line - 1 : lastLine;
+		const endLine = Math.max(candidate.line, nextLine);
+		const endLineText = document.lineAt(endLine);
+		const range = new Range(
+			new Position(candidate.line, 0),
+			endLineText.range.end,
+		);
+		return new DocumentSymbol(
+			candidate.name,
+			candidate.detail,
+			candidate.kind,
+			range,
+			candidate.selectionRange,
+		);
+	});
+}
+
+function parseCfgSection(sectionText: string): {
+	name: string;
+	detail: string;
+	kind: SymbolKind;
+} {
+	const trimmed = sectionText.trim();
+	if (!trimmed) {
+		return { name: "section", detail: "", kind: SymbolKind.Namespace };
+	}
+
+	const parts = trimmed.split(/\s+/);
+	const rawType = parts[0];
+	const type = rawType.toLowerCase();
+	const rest = parts.slice(1).join(" ");
+	const kind = CFG_SECTION_KINDS[type] ?? SymbolKind.Namespace;
+
+	if (type === "include") {
+		return {
+			name: rest || trimmed,
+			detail: rawType,
+			kind,
+		};
+	}
+
+	if (rest) {
+		return { name: rest, detail: rawType, kind };
+	}
+
+	return { name: trimmed, detail: "", kind };
+}
+
+function parseGcodeHeading(text: string): string | null {
+	const trimmed = text.trim();
+	if (!trimmed) {
+		return null;
+	}
+
+	const bracketMatch = trimmed.match(/^\[(.+)\]$/);
+	if (bracketMatch) {
+		return bracketMatch[1].trim();
+	}
+
+	if (trimmed.startsWith("@") || trimmed.startsWith("#")) {
+		return trimmed.slice(1).trim() || null;
+	}
+
+	const keyMatch = trimmed.match(/^([A-Za-z0-9_]+)\s*[:\-]\s*(.*)$/);
+	if (keyMatch) {
+		const key = keyMatch[1].toUpperCase();
+		if (GCODE_HEADING_IGNORE_KEYS.has(key)) {
+			return null;
+		}
+		return trimmed;
+	}
+
+	if (/^[A-Z0-9][A-Z0-9 _-]{2,}$/.test(trimmed)) {
+		if (GCODE_HEADING_IGNORE_KEYS.has(trimmed.toUpperCase())) {
+			return null;
+		}
+		return trimmed;
+	}
+
+	return null;
+}
+
+export class KlipperCfgDocumentSymbolProvider
+	implements DocumentSymbolProvider
+{
+	provideDocumentSymbols(
+		document: TextDocument,
+		token: CancellationToken,
+	): DocumentSymbol[] {
+		const candidates: SymbolCandidate[] = [];
+
+		for (let line = 0; line < document.lineCount; line += 1) {
+			if (token.isCancellationRequested) {
+				break;
+			}
+
+			const lineText = document.lineAt(line).text;
+			const match = lineText.match(CFG_SECTION_RE);
+			if (!match) {
+				continue;
+			}
+
+			const sectionText = match[1];
+			const parsed = parseCfgSection(sectionText);
+			const headerStart = lineText.indexOf("[");
+			const headerEnd = lineText.indexOf("]", headerStart + 1);
+			const selectionStart = Math.max(headerStart + 1, 0);
+			const selectionEnd = Math.max(headerEnd, selectionStart);
+			const selectionRange = new Range(
+				new Position(line, selectionStart),
+				new Position(line, selectionEnd),
+			);
+
+			candidates.push({
+				name: parsed.name,
+				detail: parsed.detail,
+				kind: parsed.kind,
+				line,
+				selectionRange,
+			});
+		}
+
+		return buildSymbols(document, candidates);
+	}
+}
+
+export class KlipperGcodeDocumentSymbolProvider
+	implements DocumentSymbolProvider
+{
+	provideDocumentSymbols(
+		document: TextDocument,
+		token: CancellationToken,
+	): DocumentSymbol[] {
+		const candidates: SymbolCandidate[] = [];
+
+		for (let line = 0; line < document.lineCount; line += 1) {
+			if (token.isCancellationRequested) {
+				break;
+			}
+
+			const lineText = document.lineAt(line).text;
+			const match = lineText.match(GCODE_HEADING_RE);
+			if (!match) {
+				continue;
+			}
+
+			const rawHeading = match[1];
+			const heading = parseGcodeHeading(rawHeading);
+			if (!heading) {
+				continue;
+			}
+
+			const rawStart = lineText.indexOf(rawHeading);
+			const trimmedStart = rawHeading.indexOf(rawHeading.trim());
+			const selectionStart = Math.max(rawStart + trimmedStart, 0);
+			const selectionEnd = selectionStart + heading.length;
+			const selectionRange = new Range(
+				new Position(line, selectionStart),
+				new Position(line, selectionEnd),
+			);
+
+			candidates.push({
+				name: heading,
+				detail: "",
+				kind: SymbolKind.Namespace,
+				line,
+				selectionRange,
+			});
+		}
+
+		return buildSymbols(document, candidates);
+	}
+}
diff --git a/packages/klipper/src/app/main.ts b/packages/klipper/src/app/main.ts
index df4342c..d2f9548 100644
--- a/packages/klipper/src/app/main.ts
+++ b/packages/klipper/src/app/main.ts
@@ -1,5 +1,20 @@
-import { ExtensionContext } from "vscode";
+import { ExtensionContext, languages } from "vscode";
+import {
+	KlipperCfgDocumentSymbolProvider,
+	KlipperGcodeDocumentSymbolProvider,
+} from "./documentSymbols";
 
-export function activate(context: ExtensionContext) {}
+export function activate(context: ExtensionContext) {
+	context.subscriptions.push(
+		languages.registerDocumentSymbolProvider(
+			{ language: "klipper-cfg" },
+			new KlipperCfgDocumentSymbolProvider(),
+		),
+		languages.registerDocumentSymbolProvider(
+			{ language: "klipper-gcode" },
+			new KlipperGcodeDocumentSymbolProvider(),
+		),
+	);
+}
 
 export function deactivate() {}