diff --git a/src/resources/extensions/sf/auto-dispatch.ts b/src/resources/extensions/sf/auto-dispatch.ts
index 07cacfc01..d4755a8fa 100644
--- a/src/resources/extensions/sf/auto-dispatch.ts
+++ b/src/resources/extensions/sf/auto-dispatch.ts
@@ -32,6 +32,7 @@ import {
 	checkNeedsRunUat,
 } from "./auto-prompts.js";
 import { hasImplementationArtifacts } from "./auto-recovery.js";
+import { getExecuteTaskInstructionConflict } from "./execution-instruction-guard.js";
 import {
 	extractUatType,
 	loadActiveOverrides,
@@ -912,6 +913,20 @@ export const DISPATCH_RULES: DispatchRule[] = [
 			const tid = state.activeTask.id;
 			const tTitle = state.activeTask.title;
 			const unitId = `${mid}/${sid}/${tid}`;
+			const instructionConflict = getExecuteTaskInstructionConflict(
+				basePath,
+				mid,
+				sid,
+				tid,
+				tTitle,
+			);
+			if (instructionConflict) {
+				return {
+					action: "stop",
+					reason: instructionConflict.reason,
+					level: "error",
+				};
+			}
 			const prompt = await buildExecuteTaskPrompt(
 				mid,
 				sid,
diff --git a/src/resources/extensions/sf/execution-instruction-guard.ts b/src/resources/extensions/sf/execution-instruction-guard.ts
new file mode 100644
index 000000000..c59a94056
--- /dev/null
+++ b/src/resources/extensions/sf/execution-instruction-guard.ts
@@ -0,0 +1,94 @@
+import { existsSync, readFileSync } from "node:fs";
+import { join } from "node:path";
+import { resolveTaskFile } from "./paths.js";
+
+export interface ExecutionInstructionConflict {
+	reason: string;
+}
+
+const REPO_INSTRUCTION_FILES = [
+	"AGENTS.md",
+	"CLAUDE.md",
+	"CONTRIBUTING.md",
+	"README.md",
+] as const;
+
+function readIfExists(path: string): string {
+	try {
+		return existsSync(path) ? readFileSync(path, "utf-8") : "";
+	} catch {
+		return "";
+	}
+}
+
+function loadRepoInstructionText(basePath: string): string {
+	return REPO_INSTRUCTION_FILES.map((file) =>
+		readIfExists(join(basePath, file)),
+	)
+		.filter(Boolean)
+		.join("\n\n");
+}
+
+function hasLegacyStagingConstraint(instructions: string): boolean {
+	const text = instructions.toLowerCase();
+	const marksStagingHistorical =
+		text.includes("legacy staging artifacts") ||
+		/deploy\/staging\/?.{0,160}historical/s.test(text) ||
+		text.includes("there is no staging environment");
+	const forbidsStagingAsTarget =
+		text.includes("do not treat them as the deploy target") ||
+		text.includes("do not treat them as deploy target") ||
+		text.includes("do not assume docker-compose") ||
+		/unless.{0,80}local compose validation/s.test(text);
+
+	return marksStagingHistorical && forbidsStagingAsTarget;
+}
+
+function taskTargetsLocalComposeStaging(taskText: string): boolean {
+	const text = taskText.toLowerCase();
+	const hasCompose = /\bdocker(?:\s+compose|-compose)\b/.test(text);
+	const hasStagingTarget =
+		text.includes("deploy/staging") ||
+		text.includes("staging stack") ||
+		text.includes("staging environment") ||
+		text.includes("local-compose");
+	const asksToRunCompose =
+		/\b(validate|start|starts|smoke|poll|health|shut down|up|down)\b.{0,120}\bdocker(?:\s+compose|-compose)\b/s.test(
+			text,
+		) ||
+		/\bdocker(?:\s+compose|-compose)\b.{0,120}\b(up|-d|start|starts|run|validate|health|down)\b/s.test(
+			text,
+		);
+
+	return hasStagingTarget && (hasCompose || asksToRunCompose);
+}
+
+function taskRecordsExplicitLocalComposeRequest(taskText: string): boolean {
+	return /(?:user|human)\s+explicitly\s+(?:asked|requested).{0,120}(?:local compose|docker(?:\s+compose|-compose)|deploy\/staging)/is.test(
+		taskText,
+	);
+}
+
+export function getExecuteTaskInstructionConflict(
+	basePath: string,
+	mid: string,
+	sid: string,
+	tid: string,
+	taskTitle: string,
+): ExecutionInstructionConflict | null {
+	const instructions = loadRepoInstructionText(basePath);
+	if (!hasLegacyStagingConstraint(instructions)) return null;
+
+	const taskPlanPath = resolveTaskFile(basePath, mid, sid, tid, "PLAN");
+	const taskPlanContent = taskPlanPath ? readIfExists(taskPlanPath) : "";
+	const taskText = [taskTitle, taskPlanContent].filter(Boolean).join("\n\n");
+	if (!taskTargetsLocalComposeStaging(taskText)) return null;
+	if (taskRecordsExplicitLocalComposeRequest(taskText)) return null;
+
+	return {
+		reason:
+			`Cannot dispatch execute-task ${mid}/${sid}/${tid}: task plan targets Docker Compose staging, ` +
+			"but current repo instructions mark deploy/staging as historical and say not to treat it as the deploy target unless explicitly requested. " +
+			"Replan or skip this stale task, and use repo-appropriate verification instead.",
+	};
+}
diff --git a/src/resources/extensions/sf/tests/dispatch-missing-task-plans.test.ts b/src/resources/extensions/sf/tests/dispatch-missing-task-plans.test.ts
index 1da054069..fe9480f04 100644
--- a/src/resources/extensions/sf/tests/dispatch-missing-task-plans.test.ts
+++ b/src/resources/extensions/sf/tests/dispatch-missing-task-plans.test.ts
@@ -48,6 +48,14 @@ function makeContext(
 // ─── Scaffold helpers ──────────────────────────────────────────────────────
 
 function scaffoldSlicePlan(basePath: string, mid: string, sid: string): void {
+	const milestoneDir = join(basePath, ".sf", "milestones", mid);
+	mkdirSync(milestoneDir, { recursive: true });
+	writeFileSync(
+		join(milestoneDir, `${mid}-CONTEXT.md`),
+		["# Test Milestone Context", "", "Existing test fixture context.", ""].join(
+			"\n",
+		),
+	);
 	const dir = join(basePath, ".sf", "milestones", mid, "slices", sid);
 	mkdirSync(dir, { recursive: true });
 	writeFileSync(
@@ -121,6 +129,57 @@ test("dispatch: present task plan proceeds to execute-task normally", async (t)
 	);
 });
 
+test("dispatch: stale Docker Compose staging task is blocked by current repo instructions", async (t) => {
+	const tmp = mkdtempSync(join(tmpdir(), "sf-stale-staging-"));
+	t.after(() => rmSync(tmp, { recursive: true, force: true }));
+
+	writeFileSync(
+		join(tmp, "AGENTS.md"),
+		[
+			"## Pilot Test Infrastructure",
+			"There is no staging environment.",
+			"`deploy/staging/` Docker Compose is a historical artifact.",
+			"Do not treat them as the deploy target unless explicitly asked for local compose validation.",
+			"Do not assume docker-compose is the only or primary option.",
+			"",
+		].join("\n"),
+	);
+	scaffoldSlicePlan(tmp, "M002", "S03");
+	scaffoldTaskPlan(tmp, "M002", "S03", "T01");
+	writeFileSync(
+		join(
+			tmp,
+			".sf",
+			"milestones",
+			"M002",
+			"slices",
+			"S03",
+			"tasks",
+			"T01-PLAN.md",
+		),
+		[
+			"# T01: Validate docker-compose staging stack starts cleanly",
+			"",
+			"Start the full staging stack via docker-compose, poll for portal health, verify postgres connectivity, then shut down cleanly.",
+			"",
+			"verify: docker compose up -d && poll for health and then docker compose down",
+			"",
+		].join("\n"),
+	);
+
+	const result = await resolveDispatch(makeContext(tmp));
+
+	assert.equal(result.action, "stop");
+	assert.match(
+		result.action === "stop" ? result.reason : "",
+		/Docker Compose staging/,
+	);
+	assert.match(
+		result.action === "stop" ? result.reason : "",
+		/deploy\/staging as historical/,
+	);
+});
+
 test("dispatch: plan-slice recovery loop — second call after plan-slice still recovers cleanly", async (t) => {
 	// Simulate: plan-slice ran but T01-PLAN.md is still missing (e.g. agent crashed mid-write).
 	// Dispatch should still re-dispatch plan-slice, not hard-stop.