Consolidate duplicate patterns and simplify codebase (#1317)

* refactor(shared): unify binary downloader and session path storage

- Create binary-downloader.ts for common download/extract logic
- Create session-injected-paths.ts for unified path tracking
- Refactor comment-checker, ast-grep, grep downloaders to use shared util
- Consolidate directory injector types into shared module

* feat(shared): implement unified model resolution pipeline

- Create ModelResolutionPipeline for centralized model selection
- Refactor model-resolver to use pipeline
- Update delegate-task and config-handler to use unified logic
- Ensure consistent model resolution across all agent types

* refactor(agents): simplify agent utils and metadata management

- Extract helper functions for config merging and env context
- Register prompt metadata for all agents
- Simplify agent variant detection logic

* cleanup: inline utilities and remove unused exports

- Remove case-insensitive.ts (inline with native JS)
- Simplify opencode-version helpers
- Remove unused getModelLimit, createCompactionContextInjector exports
- Inline transcript entry creation in claude-code-hooks
- Update tests accordingly

---------

Co-authored-by: justsisyphus <justsisyphus@users.noreply.github.com>

src/index.ts

@@ -12,8 +12,6 @@ import {
   createThinkModeHook,
   createClaudeCodeHooksHook,
   createAnthropicContextWindowLimitRecoveryHook,
-
-  createCompactionContextInjector,
   createRulesInjectorHook,
   createBackgroundNotificationHook,
   createAutoUpdateCheckerHook,
@@ -80,9 +78,9 @@ import { initTaskToastManager } from "./features/task-toast-manager";
 import { TmuxSessionManager } from "./features/tmux-subagent";
 import { clearBoulderState } from "./features/boulder-state";
 import { type HookName } from "./config";
-import { log, detectExternalNotificationPlugin, getNotificationConflictWarning, resetMessageCursor, includesCaseInsensitive, hasConnectedProvidersCache, getOpenCodeVersion, isOpenCodeVersionAtLeast, OPENCODE_NATIVE_AGENTS_INJECTION_VERSION } from "./shared";
+import { log, detectExternalNotificationPlugin, getNotificationConflictWarning, resetMessageCursor, hasConnectedProvidersCache, getOpenCodeVersion, isOpenCodeVersionAtLeast, OPENCODE_NATIVE_AGENTS_INJECTION_VERSION } from "./shared";
 import { loadPluginConfig } from "./plugin-config";
-import { createModelCacheState, getModelLimit } from "./plugin-state";
+import { createModelCacheState } from "./plugin-state";
 import { createConfigHandler } from "./plugin-handlers";
 
 const OhMyOpenCodePlugin: Plugin = async (ctx) => {
@@ -176,9 +174,6 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
         experimental: pluginConfig.experimental,
       })
     : null;
-  const compactionContextInjector = isHookEnabled("compaction-context-injector")
-    ? createCompactionContextInjector()
-    : undefined;
   const rulesInjector = isHookEnabled("rules-injector")
     ? createRulesInjectorHook(ctx)
     : null;
@@ -303,9 +298,8 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
   const backgroundTools = createBackgroundTools(backgroundManager, ctx.client);
 
   const callOmoAgent = createCallOmoAgent(ctx, backgroundManager);
-  const isMultimodalLookerEnabled = !includesCaseInsensitive(
-    pluginConfig.disabled_agents ?? [],
-    "multimodal-looker"
+  const isMultimodalLookerEnabled = !(pluginConfig.disabled_agents ?? []).some(
+    (agent) => agent.toLowerCase() === "multimodal-looker"
   );
   const lookAt = isMultimodalLookerEnabled ? createLookAt(ctx) : null;
   const browserProvider = pluginConfig.browser_automation_engine?.provider ?? "playwright";
@@ -626,9 +620,8 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
       if (input.tool === "task") {
         const args = output.args as Record<string, unknown>;
         const subagentType = args.subagent_type as string;
-        const isExploreOrLibrarian = includesCaseInsensitive(
-          ["explore", "librarian"],
-          subagentType ?? ""
+        const isExploreOrLibrarian = ["explore", "librarian"].some(
+          (name) => name.toLowerCase() === (subagentType ?? "").toLowerCase()
         );
 
         args.tools = {