fix: stabilize opencode declarations across package managers

.opencode/tools/git-summary.ts

@@ -4,10 +4,10 @@
  * Returns branch/status/log/diff details for the active repository.
  */
 
-import { tool } from "@opencode-ai/plugin/tool"
+import { tool, type ToolDefinition } from "@opencode-ai/plugin/tool"
 import { execSync } from "child_process"
 
-export default tool({
+const gitSummaryTool: ToolDefinition = tool({
   description:
     "Generate git summary with branch, status, recent commits, and optional diff stats.",
   args: {
@@ -45,6 +45,8 @@ export default tool({
   },
 })
 
+export default gitSummaryTool
+
 function run(command: string, cwd: string): string {
   try {
     return execSync(command, { cwd, encoding: "utf-8", stdio: ["ignore", "pipe", "pipe"] }).trim()