chore: remove dead code - unused imports and variables

- Remove unused import OhMyOpenCodeConfig from src/index.ts
- Remove unused import dirname from src/features/opencode-skill-loader/loader.ts
- Remove unused import detectKeywords from src/hooks/keyword-detector/index.ts
- Remove unused import CliMatch from src/tools/ast-grep/utils.ts
- Prefix unused parameter _original in src/tools/ast-grep/utils.ts

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

Author: code-yeongyu

src/features/opencode-skill-loader/loader.ts

@@ -1,5 +1,5 @@
 import { existsSync, readdirSync, readFileSync } from "fs"
-import { join, basename, dirname } from "path"
+import { join, basename } from "path"
 import { homedir } from "os"
 import yaml from "js-yaml"
 import { parseFrontmatter } from "../../shared/frontmatter"

src/hooks/keyword-detector/index.ts

@@ -1,5 +1,5 @@
 import type { PluginInput } from "@opencode-ai/plugin"
-import { detectKeywords, detectKeywordsWithType, extractPromptText } from "./detector"
+import { detectKeywordsWithType, extractPromptText } from "./detector"
 import { log } from "../../shared"
 import { injectHookMessage } from "../../features/hook-message-injector"
 

src/index.ts

@@ -53,7 +53,7 @@ import {
 } from "./tools";
 import { BackgroundManager } from "./features/background-agent";
 import { SkillMcpManager } from "./features/skill-mcp-manager";
-import { type OhMyOpenCodeConfig, type HookName } from "./config";
+import { type HookName } from "./config";
 import { log } from "./shared";
 import { loadPluginConfig } from "./plugin-config";
 import { createModelCacheState, getModelLimit } from "./plugin-state";

src/tools/ast-grep/utils.ts

@@ -1,4 +1,4 @@
-import type { CliMatch, AnalyzeResult, SgResult } from "./types"
+import type { AnalyzeResult, SgResult } from "./types"
 
 export function formatSearchResult(result: SgResult): string {
   if (result.error) {
@@ -93,7 +93,7 @@ export function formatAnalyzeResult(results: AnalyzeResult[], extractedMetaVars:
   return lines.join("\n")
 }
 
-export function formatTransformResult(original: string, transformed: string, editCount: number): string {
+export function formatTransformResult(_original: string, transformed: string, editCount: number): string {
   if (editCount === 0) {
     return "No matches found to transform"
   }