feat: deprecate the Tasks panel and hide it on Coder 2.35 and above

package.json

@@ -313,7 +313,7 @@
 				},
 				{
 					"id": "coderTasks",
-					"title": "Coder Tasks",
+					"title": "Coder Tasks (Deprecated)",
 					"icon": "media/tasks-logo.svg"
 				},
 				{
@@ -354,14 +354,14 @@
 					"id": "coder.tasksLogin",
 					"name": "Coder Tasks",
 					"icon": "media/tasks-logo.svg",
-					"when": "!coder.authenticated"
+					"when": "!coder.authenticated && coder.tasksSupported"
 				},
 				{
 					"type": "webview",
 					"id": "coder.tasksPanel",
 					"name": "Coder Tasks",
 					"icon": "media/tasks-logo.svg",
-					"when": "coder.authenticated"
+					"when": "coder.authenticated && coder.tasksSupported"
 				}
 			],
 			"coderExperimentalWorkspaces": [

src/core/contextManager.ts

@@ -5,6 +5,7 @@ const CONTEXT_DEFAULTS = {
 	"coder.isOwner": false,
 	"coder.loaded": false,
 	"coder.sharedWorkspacesSupported": true,
+	"coder.tasksSupported": false,
 	"coder.workspace.connected": false,
 	"coder.workspace.updatable": false,
 	"coder.workspacesPanelEnabled": false,

src/extension.ts

@@ -4,6 +4,7 @@ import axios, { isAxiosError } from "axios";
 import { getErrorMessage } from "coder/site/src/api/errors";
 import { createRequire } from "node:module";
 import * as path from "node:path";
+import * as semver from "semver";
 import * as vscode from "vscode";
 
 import { AnnouncementManager } from "./announcements/manager";
@@ -15,6 +16,7 @@ import { ServiceContainer } from "./core/container";
 import { DeploymentManager } from "./deployment/deploymentManager";
 import { CertificateError } from "./error/certificateError";
 import { getErrorDetail, toError } from "./error/errorUtils";
+import { tasksSupported } from "./featureSet";
 import {
 	ActivationTelemetry,
 	type ActivationTracer,
@@ -202,12 +204,32 @@ async function doActivate(
 	);
 	ctx.subscriptions.push(sharedWorkspacesProvider);
 
+	// The deprecated Tasks panel only shows on deployments old enough to
+	// still support it, which requires fetching the deployment version.
+	const updateTasksSupported = async () => {
+		let supported = false;
+		if (deploymentManager.session.current.kind === "signedIn") {
+			try {
+				const buildInfo = await client.getBuildInfo();
+				supported = tasksSupported(semver.parse(buildInfo.version));
+			} catch (error) {
+				output.warn(
+					"Unable to fetch deployment version for Tasks panel",
+					error,
+				);
+			}
+		}
+		contextManager.set("coder.tasksSupported", supported);
+	};
+	void updateTasksSupported();
+
 	// Re-probe support on session change (login, logout, deployment switch);
 	// the next fetch clears the message again if still unsupported.
 	ctx.subscriptions.push(
-		deploymentManager.session.onDidChange(() =>
-			contextManager.set("coder.sharedWorkspacesSupported", true),
-		),
+		deploymentManager.session.onDidChange(() => {
+			contextManager.set("coder.sharedWorkspacesSupported", true);
+			void updateTasksSupported();
+		}),
 	);
 
 	// createTreeView, unlike registerTreeDataProvider, gives us the tree view API

src/featureSet.ts

@@ -26,6 +26,14 @@ function versionAtLeast(
 	return version.compare(minVersion) >= 0 || version.prerelease[0] === "devel";
 }
 
+/**
+ * True when the deployment predates the June 2026 Tasks deprecation
+ * (2.34 and below). The deprecated Tasks panel is hidden everywhere else.
+ */
+export function tasksSupported(version: semver.SemVer | null): boolean {
+	return version !== null && !versionAtLeast(version, "2.35.0");
+}
+
 /**
  * Builds and returns a FeatureSet object for a given coder version.
  */

test/unit/featureSet.test.ts

@@ -1,7 +1,11 @@
 import * as semver from "semver";
 import { describe, expect, it } from "vitest";
 
-import { type FeatureSet, featureSetForVersion } from "@/featureSet";
+import {
+	type FeatureSet,
+	featureSetForVersion,
+	tasksSupported,
+} from "@/featureSet";
 
 function expectFlag(
 	flag: keyof FeatureSet,
@@ -66,6 +70,16 @@ describe("check version support", () => {
 			["v2.36.0", "v2.36.1", "v2.37.0", "v3.0.0"],
 		);
 	});
+	it("tasks panel only on deployments before deprecation", () => {
+		for (const v of ["v2.34.0", "v2.34.7+e491217", "v2.0.0"]) {
+			expect(tasksSupported(semver.parse(v)), v).toBe(true);
+		}
+		for (const v of ["v2.35.0", "v2.36.1", "v3.0.0", "v2.36.0-devel+abc123"]) {
+			expect(tasksSupported(semver.parse(v)), v).toBe(false);
+		}
+		expect(tasksSupported(null)).toBe(false);
+	});
+
 	it("enables all features for development builds", () => {
 		const featureSet = featureSetForVersion(
 			semver.parse("v0.0.0-devel+abc123"),