plan: use path helpers in close

.opencode/plans/1773656570427-mighty-tiger.md

@@ -173,10 +173,14 @@ export function sanitizeName(name: string): string {
   // Session name sanitization
 }
 
+export function getSessionPath(sessionName: string): string {
+  const homedir = process.env.HOME || process.env.USERPROFILE || "/tmp";
+  return `${homedir}/.local/share/opencode/multi-model/${sessionName}`;
+}
+
 export function getWorktreePath(sessionName: string, windowName: string): string {
   // Worktree path generation
-  const homedir = process.env.HOME || process.env.USERPROFILE || "/tmp";
-  return `${homedir}/.local/share/opencode/multi-model/${sessionName}/${windowName}`;
+  return `${getSessionPath(sessionName)}/${windowName}`;
 }
 
 export interface WorktreeInfo {
@@ -189,8 +193,7 @@ export async function getWorktreesForSession(sessionName: string): Promise<Workt
   const { stdout } = await runCommand(["git", "worktree", "list", "--porcelain"]);
   const worktrees: WorktreeInfo[] = [];
   
-  const homedir = process.env.HOME || process.env.USERPROFILE || "/tmp";
-  const sessionPath = `${homedir}/.local/share/opencode/multi-model/${sessionName}`;
+  const sessionPath = getSessionPath(sessionName);
   
   let currentWorktree: Partial<WorktreeInfo> = {};
   
@@ -236,7 +239,7 @@ import type { MultiModelOptions, MultiModelResult } from "../types";
 import { 
   runCommand, shellQuote, normalizeModels, findDuplicates,
   createWindowPlans, suggestModels, formatInvalidModelError,
-  sanitizeName, getWorktreePath, undoWorktree, getBinaryName
+  sanitizeName, getWorktreePath, getSessionPath, undoWorktree, getBinaryName
 } from "./utils";
 
 export async function launchMultiModel(options: MultiModelOptions): Promise<MultiModelResult> {
@@ -263,7 +266,7 @@ To close the session and cleanup:
   
 Or manually:
   tmux kill-session -t ${options.sessionName}
-  rm -rf ~/.local/share/opencode/multi-model/${safeSessionName} && git worktree prune
+  rm -rf ${getSessionPath(safeSessionName)} && git worktree prune
   git branch -D $(git branch --format='%(refname:short)' --list 'opencode/${safeSessionName}/*')
 `
   };
@@ -275,7 +278,7 @@ Or manually:
 ```typescript
 // src/core/close.ts
 import type { CloseSessionOptions, CloseSessionResult } from "../types";
-import { runCommand, getWorktreePath, getWorktreesForSession, sanitizeName } from "./utils";
+import { runCommand, getSessionPath, getWorktreesForSession, sanitizeName } from "./utils";
 import * as readline from "readline";
 
 async function promptUser(question: string): Promise<string> {
@@ -341,7 +344,7 @@ export async function closeMultiModel(options: CloseSessionOptions): Promise<Clo
       }
       
       // Also remove the base directory if empty
-      const worktreeBase = `~/.local/share/opencode/multi-model/${options.sessionName}`;
+      const worktreeBase = getSessionPath(options.sessionName);
       try {
         await runCommand(["rmdir", worktreeBase]);
       } catch {