fix: numeric skill names, ultrawork missing run_in_background, ZWSP agent lookups

- #3354: Coerce data.name to String in loadSkillFromPath/loadSkillFromPathAsync
  to prevent crash when YAML parses numeric skill names (e.g., name: 12306)

- #3416: Add required run_in_background parameter to all task() examples in
  ultrawork prompts (default, gpt, gemini, planner) to match tool schema

- #3379/#3417/#3418/#3337/#3335: Strip ZWSP (U+200B) before agent name
  comparisons in agent-tool-restrictions, sync-prompt-sender, tool-execute-after,
  tool-execute-before, oracle-verification-detector, call-omo-agent,
  recovery-prompt-config, and agent-variant to prevent ZWSP-prefixed display
  names from breaking exact-match lookups

src/tools/call-omo-agent/tools.ts

@@ -6,7 +6,7 @@ import type { CategoriesConfig, AgentOverrides } from "../../config/schema"
 import type { DelegatedModelConfig } from "../../shared/model-resolution-types"
 import type { FallbackEntry } from "../../shared/model-requirements"
 import { AGENT_MODEL_REQUIREMENTS } from "../../shared/model-requirements"
-import { getAgentConfigKey } from "../../shared/agent-display-names"
+import { getAgentConfigKey, stripInvisibleAgentCharacters } from "../../shared/agent-display-names"
 import { normalizeFallbackModels } from "../../shared/model-resolver"
 import { buildFallbackChainFromModels } from "../../shared/fallback-chain-from-models"
 import { log } from "../../shared"
@@ -104,20 +104,21 @@ export function createCallOmoAgent(
       const toolCtx = toolContext as ToolContextWithMetadata
       log(`[call_omo_agent] Starting with agent: ${args.subagent_type}, background: ${args.run_in_background}`)
 
-      // Case-insensitive agent validation - allows "Explore", "EXPLORE", "explore" etc.
+      // Strip ZWSP and case-insensitive agent validation - allows "Explore", "EXPLORE", "explore" etc.
+      const strippedAgentType = stripInvisibleAgentCharacters(args.subagent_type)
       if (
         !ALLOWED_AGENTS.some(
-          (name) => name.toLowerCase() === args.subagent_type.toLowerCase(),
+          (name) => name.toLowerCase() === strippedAgentType.toLowerCase(),
         )
       ) {
         return `Error: Invalid agent type "${args.subagent_type}". Only ${ALLOWED_AGENTS.join(", ")} are allowed.`
       }
 
-      const normalizedAgent = args.subagent_type.toLowerCase() as AllowedAgentType
+      const normalizedAgent = strippedAgentType.toLowerCase() as AllowedAgentType
       args = { ...args, subagent_type: normalizedAgent }
 
       // Check if agent is disabled
-      if (disabledAgents.some((disabled) => disabled.toLowerCase() === normalizedAgent)) {
+      if (disabledAgents.some((disabled) => stripInvisibleAgentCharacters(disabled).toLowerCase() === normalizedAgent)) {
         return `Error: Agent "${normalizedAgent}" is disabled via disabled_agents configuration. Remove it from disabled_agents in your ${CONFIG_BASENAME}.json to use it.`
       }
 

src/tools/delegate-task/sync-prompt-sender.ts

@@ -8,6 +8,7 @@ import {
 } from "../../shared/model-suggestion-retry"
 import { formatDetailedError } from "./error-formatting"
 import { getAgentToolRestrictions } from "../../shared/agent-tool-restrictions"
+import { stripInvisibleAgentCharacters } from "../../shared/agent-display-names"
 import { applySessionPromptParams } from "../../shared/session-prompt-params-helpers"
 import { setSessionTools } from "../../shared/session-tools-store"
 import { createInternalAgentTextPart } from "../../shared/internal-initiator-marker"
@@ -41,7 +42,7 @@ function buildPromptGenerationParams(model: DelegatedModelConfig | undefined): R
 }
 
 function isOracleAgent(agentToUse: string): boolean {
-  return agentToUse.toLowerCase() === "oracle"
+  return stripInvisibleAgentCharacters(agentToUse).toLowerCase() === "oracle"
 }
 
 function isUnexpectedEofError(error: unknown): boolean {
@@ -80,7 +81,7 @@ export async function sendSyncPrompt(
   const promptArgs = {
     path: { id: input.sessionID },
     body: {
-      agent: input.agentToUse.replace(/^\u200B+/, ""),
+      agent: stripInvisibleAgentCharacters(input.agentToUse),
       system: input.systemContent,
       tools,
       parts: [createInternalAgentTextPart(effectivePrompt)],