feat(config): add custom_agents overrides and strict agent validation

src/plugin-handlers/prometheus-agent-config-builder.ts

@@ -1,6 +1,7 @@
 import type { CategoryConfig } from "../config/schema";
 import { PROMETHEUS_PERMISSION, getPrometheusPrompt } from "../agents/prometheus";
 import { resolvePromptAppend } from "../agents/builtin-agents/resolve-file-uri";
+import { parseRegisteredAgentSummaries } from "../agents/custom-agent-summaries";
 import { AGENT_MODEL_REQUIREMENTS } from "../shared/model-requirements";
 import {
   fetchAvailableModels,
@@ -27,6 +28,7 @@ export async function buildPrometheusAgentConfig(params: {
   pluginPrometheusOverride: PrometheusOverride | undefined;
   userCategories: Record<string, CategoryConfig> | undefined;
   currentModel: string | undefined;
+  customAgentSummaries?: unknown;
 }): Promise<Record<string, unknown>> {
   const categoryConfig = params.pluginPrometheusOverride?.category
     ? resolveCategoryConfig(params.pluginPrometheusOverride.category, params.userCategories)
@@ -65,11 +67,18 @@ export async function buildPrometheusAgentConfig(params: {
   const maxTokensToUse =
     params.pluginPrometheusOverride?.maxTokens ?? categoryConfig?.maxTokens;
 
+  const customAgentCatalog = parseRegisteredAgentSummaries(params.customAgentSummaries)
+  const customAgentBlock = customAgentCatalog.length > 0
+    ? `\n\n<custom_agent_catalog>\nAvailable custom agents for planning/delegation:\n${customAgentCatalog
+      .map((agent) => `- ${agent.name}: ${agent.description || "No description provided"}`)
+      .join("\n")}\n</custom_agent_catalog>`
+    : ""
+
   const base: Record<string, unknown> = {
     ...(resolvedModel ? { model: resolvedModel } : {}),
     ...(variantToUse ? { variant: variantToUse } : {}),
     mode: "all",
-    prompt: getPrometheusPrompt(resolvedModel),
+    prompt: getPrometheusPrompt(resolvedModel) + customAgentBlock,
     permission: PROMETHEUS_PERMISSION,
     description: `${(params.configAgentPlan?.description as string) ?? "Plan agent"} (Prometheus - OhMyOpenCode)`,
     color: (params.configAgentPlan?.color as string) ?? "#FF5722",