fix(call-omo-agent): address cubic review findings and add requirement-based tests

- Fix agent-resolver.ts: add defensive validation on agent name (typeof, trim, filter)
- Fix tools.test.ts: correct mock to return {data: agents} matching SDK contract
- Fix agent-config-handler.ts: include opencode global/project agents in customAgentSummaries
- Add agent-resolver.test.ts: 14 requirement-based tests covering R1-R7 behavioral specs
- Add tools-edge-cases.test.ts: 5 integration tests for rollback, whitespace, dedup, session_id

src/plugin-handlers/agent-config-handler.ts

@@ -96,6 +96,8 @@ export async function applyAgentConfig(params: {
   const includeClaudeAgents = params.pluginConfig.claude_code?.agents ?? true;
   const userAgents = includeClaudeAgents ? loadUserAgents() : {};
   const projectAgents = includeClaudeAgents ? loadProjectAgents(params.ctx.directory) : {};
+  const opencodeGlobalAgents = loadOpencodeGlobalAgents();
+  const opencodeProjectAgents = loadOpencodeProjectAgents(params.ctx.directory);
   const rawPluginAgents = params.pluginComponents.agents;
 
   const pluginAgents = Object.fromEntries(
@@ -113,6 +115,8 @@ export async function applyAgentConfig(params: {
     ...Object.entries(configAgent ?? {}),
     ...Object.entries(userAgents),
     ...Object.entries(projectAgents),
+    ...Object.entries(opencodeGlobalAgents),
+    ...Object.entries(opencodeProjectAgents),
     ...Object.entries(pluginAgents).filter(([, config]) => config !== undefined),
   ]
     .filter(([, config]) => config != null)
@@ -139,9 +143,6 @@ export async function applyAgentConfig(params: {
     disableOmoEnv,
   );
 
-  const opencodeGlobalAgents = loadOpencodeGlobalAgents();
-  const opencodeProjectAgents = loadOpencodeProjectAgents(params.ctx.directory);
-
   const disabledAgentNames = new Set(
     (migratedDisabledAgents ?? []).map(a => a.toLowerCase())
   );