diff --git a/src/hooks/todo-continuation-enforcer/continuation-injection.test.ts b/src/hooks/todo-continuation-enforcer/continuation-injection.test.ts
index 56dd7cb4ea..100997c75f 100644
--- a/src/hooks/todo-continuation-enforcer/continuation-injection.test.ts
+++ b/src/hooks/todo-continuation-enforcer/continuation-injection.test.ts
@@ -40,7 +40,45 @@ describe("injectContinuation", () => {
     })
 
     // then
-    expect(capturedAgent).toBe("Sisyphus - Ultraworker")
+    expect(capturedAgent).toBe("\u200BSisyphus - Ultraworker")
+  })
+
+  test("falls back to the runtime display name when only config-key agent info is available", async () => {
+    // given
+    let capturedAgent: string | undefined
+    const ctx = {
+      directory: "/tmp/test",
+      client: {
+        session: {
+          todo: async () => ({ data: [{ id: "1", content: "todo", status: "pending", priority: "high" }] }),
+          promptAsync: async (input: {
+            body: {
+              agent?: string
+            }
+          }) => {
+            capturedAgent = input.body.agent
+            return {}
+          },
+        },
+      },
+    }
+    const sessionStateStore = {
+      getExistingState: () => ({ inFlight: false, lastInjectedAt: 0, consecutiveFailures: 0 }),
+    }
+
+    // when
+    await injectContinuation({
+      ctx: ctx as never,
+      sessionID: "ses_display_name_fallback",
+      resolvedInfo: {
+        agent: "sisyphus",
+        model: { providerID: "anthropic", modelID: "claude-sonnet-4-20250514" },
+      },
+      sessionStateStore: sessionStateStore as never,
+    })
+
+    // then
+    expect(capturedAgent).toBe("\u200BSisyphus - Ultraworker")
   })
 
   test("inherits tools from resolved message info when reinjecting", async () => {
diff --git a/src/hooks/todo-continuation-enforcer/continuation-injection.ts b/src/hooks/todo-continuation-enforcer/continuation-injection.ts
index 5844bebd20..29feddef02 100644
--- a/src/hooks/todo-continuation-enforcer/continuation-injection.ts
+++ b/src/hooks/todo-continuation-enforcer/continuation-injection.ts
@@ -19,6 +19,7 @@ import { log } from "../../shared/logger"
 import { isSqliteBackend } from "../../shared/opencode-storage-detection"
 import {
   getAgentConfigKey,
+  getAgentRuntimeName,
   normalizeAgentForPromptKey,
 } from "../../shared/agent-display-names"
 
@@ -130,7 +131,13 @@ export async function injectContinuation(args: {
   }
 
   const promptAgent = normalizeAgentForPromptKey(agentName)
-  const launchAgent = resolveRegisteredAgentName(agentName)
+  const configKey = promptAgent ?? (agentName ? getAgentConfigKey(agentName) : undefined)
+  const fallbackLaunchAgent = configKey ? getAgentRuntimeName(configKey) : undefined
+  const resolvedLaunchAgent = resolveRegisteredAgentName(agentName)
+  const launchAgent =
+    resolvedLaunchAgent && resolvedLaunchAgent !== agentName
+      ? resolvedLaunchAgent
+      : fallbackLaunchAgent ?? agentName ?? promptAgent
 
   if (promptAgent && skipAgents.some(s => getAgentConfigKey(s) === getAgentConfigKey(promptAgent))) {
     log(`[${HOOK_NAME}] Skipped: agent in skipAgents list`, { sessionID, agent: agentName })