Fix invisible characters in agent names

src/shared/agent-display-names.test.ts

@@ -186,6 +186,11 @@ describe("getAgentConfigKey", () => {
   it("resolves atlas even when the UI ordering prefix is present", () => {
     expect(getAgentConfigKey(getAgentListDisplayName("atlas"))).toBe("atlas")
   })
+
+  it("resolves display names even when zero-width characters are embedded", () => {
+    expect(getAgentConfigKey("Sisyphus\u200B - Ultraworker")).toBe("sisyphus")
+    expect(getAgentConfigKey("\uFEFFAtlas - Plan Executor")).toBe("atlas")
+  })
 })
 
 describe("getAgentListDisplayName", () => {
@@ -208,6 +213,10 @@ describe("normalizeAgentForPrompt", () => {
     expect(normalizeAgentForPrompt(getAgentListDisplayName("prometheus"))).toBe("Prometheus - Plan Builder")
     expect(normalizeAgentForPrompt(getAgentListDisplayName("atlas"))).toBe("Atlas - Plan Executor")
   })
+
+  it("removes zero-width characters before returning canonical names", () => {
+    expect(normalizeAgentForPrompt("Sisyphus\u200B - Ultraworker")).toBe("Sisyphus - Ultraworker")
+  })
 })
 
 describe("normalizeAgentForPromptKey", () => {

src/shared/agent-display-names.ts

@@ -33,8 +33,14 @@ const AGENT_LIST_SORT_PREFIXES: Record<string, string> = {
   atlas: "\u200B\u200B\u200B\u200B",
 }
 
+const ZERO_WIDTH_AGENT_CHARACTERS_REGEX = /[\u200B\u200C\u200D\uFEFF]/g
+
+export function stripInvisibleAgentCharacters(agentName: string): string {
+  return agentName.replace(ZERO_WIDTH_AGENT_CHARACTERS_REGEX, "")
+}
+
 export function stripAgentListSortPrefix(agentName: string): string {
-  return agentName.replace(/^\u200B+/, "")
+  return stripInvisibleAgentCharacters(agentName)
 }
 
 export function getAgentRuntimeName(configKey: string): string {
@@ -97,7 +103,7 @@ const LEGACY_DISPLAY_NAMES: Record<string, string> = {
  * "Atlas - Plan Executor" -> "atlas", "Atlas (Plan Executor)" -> "atlas", "atlas" -> "atlas"
  */
 export function getAgentConfigKey(agentName: string): string {
-  const lower = stripAgentListSortPrefix(agentName).toLowerCase()
+  const lower = stripAgentListSortPrefix(agentName).trim().toLowerCase()
   const reversed = REVERSE_DISPLAY_NAMES[lower]
   if (reversed !== undefined) return reversed
   const legacy = LEGACY_DISPLAY_NAMES[lower]
@@ -117,7 +123,7 @@ export function normalizeAgentForPrompt(agentName: string | undefined): string |
     return undefined
   }
 
-  const trimmed = stripAgentListSortPrefix(agentName.trim())
+  const trimmed = stripAgentListSortPrefix(agentName).trim()
   if (!trimmed) {
     return undefined
   }
@@ -143,7 +149,7 @@ export function normalizeAgentForPromptKey(agentName: string | undefined): strin
     return undefined
   }
 
-  const trimmed = stripAgentListSortPrefix(agentName.trim())
+  const trimmed = stripAgentListSortPrefix(agentName).trim()
   if (!trimmed) {
     return undefined
   }