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/create-tools.ts

@@ -0,0 +1,53 @@
+import type { AvailableCategory, AvailableSkill } from "./agents/dynamic-agent-prompt-builder"
+import type { OhMyOpenCodeConfig } from "./config"
+import type { BrowserAutomationProvider } from "./config/schema/browser-automation"
+import type { LoadedSkill } from "./features/opencode-skill-loader/types"
+import type { PluginContext, ToolsRecord } from "./plugin/types"
+import type { Managers } from "./create-managers"
+
+import { createAvailableCategories } from "./plugin/available-categories"
+import { createSkillContext } from "./plugin/skill-context"
+import { createToolRegistry } from "./plugin/tool-registry"
+
+export type CreateToolsResult = {
+  filteredTools: ToolsRecord
+  mergedSkills: LoadedSkill[]
+  availableSkills: AvailableSkill[]
+  availableCategories: AvailableCategory[]
+  browserProvider: BrowserAutomationProvider
+  disabledSkills: Set<string>
+  taskSystemEnabled: boolean
+}
+
+export async function createTools(args: {
+  ctx: PluginContext
+  pluginConfig: OhMyOpenCodeConfig
+  managers: Pick<Managers, "backgroundManager" | "tmuxSessionManager" | "skillMcpManager">
+}): Promise<CreateToolsResult> {
+  const { ctx, pluginConfig, managers } = args
+
+  const skillContext = await createSkillContext({
+    directory: ctx.directory,
+    pluginConfig,
+  })
+
+  const availableCategories = createAvailableCategories(pluginConfig)
+
+  const { filteredTools, taskSystemEnabled } = createToolRegistry({
+    ctx,
+    pluginConfig,
+    managers,
+    skillContext,
+    availableCategories,
+  })
+
+  return {
+    filteredTools,
+    mergedSkills: skillContext.mergedSkills,
+    availableSkills: skillContext.availableSkills,
+    availableCategories,
+    browserProvider: skillContext.browserProvider,
+    disabledSkills: skillContext.disabledSkills,
+    taskSystemEnabled,
+  }
+}