refactor(core): split index.ts and config-handler.ts into focused modules

Main entry point:
- create-hooks.ts, create-tools.ts, create-managers.ts
- plugin-interface.ts: plugin interface types
- plugin/ directory: plugin lifecycle modules

Config handler:
- agent-config-handler.ts, command-config-handler.ts
- tool-config-handler.ts, mcp-config-handler.ts
- provider-config-handler.ts, category-config-resolver.ts
- agent-priority-order.ts, prometheus-agent-config-builder.ts
- plugin-components-loader.ts

src/plugin/hooks/create-skill-hooks.ts

@@ -0,0 +1,37 @@
+import type { AvailableSkill } from "../../agents/dynamic-agent-prompt-builder"
+import type { HookName } from "../../config"
+import type { LoadedSkill } from "../../features/opencode-skill-loader/types"
+import type { PluginContext } from "../types"
+
+import { createAutoSlashCommandHook, createCategorySkillReminderHook } from "../../hooks"
+import { safeCreateHook } from "../../shared/safe-create-hook"
+
+export type SkillHooks = {
+  categorySkillReminder: ReturnType<typeof createCategorySkillReminderHook> | null
+  autoSlashCommand: ReturnType<typeof createAutoSlashCommandHook> | null
+}
+
+export function createSkillHooks(args: {
+  ctx: PluginContext
+  isHookEnabled: (hookName: HookName) => boolean
+  safeHookEnabled: boolean
+  mergedSkills: LoadedSkill[]
+  availableSkills: AvailableSkill[]
+}): SkillHooks {
+  const { ctx, isHookEnabled, safeHookEnabled, mergedSkills, availableSkills } = args
+
+  const safeHook = <T>(hookName: HookName, factory: () => T): T | null =>
+    safeCreateHook(hookName, factory, { enabled: safeHookEnabled })
+
+  const categorySkillReminder = isHookEnabled("category-skill-reminder")
+    ? safeHook("category-skill-reminder", () =>
+        createCategorySkillReminderHook(ctx, availableSkills))
+    : null
+
+  const autoSlashCommand = isHookEnabled("auto-slash-command")
+    ? safeHook("auto-slash-command", () =>
+        createAutoSlashCommandHook({ skills: mergedSkills }))
+    : null
+
+  return { categorySkillReminder, autoSlashCommand }
+}