Move worktrees to ~/.sandlot/<repo>/<branch> outside the project directory

src/cli.ts

@@ -1,7 +1,8 @@
 #!/usr/bin/env bun
 
 import { Command } from "commander"
-import { join } from "path"
+import { basename, join } from "path"
+import { homedir } from "os"
 import * as git from "./git.ts"
 import * as vm from "./vm.ts"
 import * as state from "./state.ts"
@@ -22,8 +23,7 @@ program
   .description("Create a new session and launch Claude")
   .action(async (branch: string, prompt?: string) => {
     const root = await git.repoRoot()
-    const worktreeRel = `.sandlot/${branch}`
-    const worktreeAbs = join(root, worktreeRel)
+    const worktreeAbs = join(homedir(), '.sandlot', basename(root), branch)
 
     const existing = await state.getSession(root, branch)
     if (existing) {
@@ -40,7 +40,7 @@ program
 
     await state.setSession(root, {
       branch,
-      worktree: worktreeRel,
+      worktree: worktreeAbs,
       created_at: new Date().toISOString(),
     })
 
@@ -94,7 +94,7 @@ program
     await vm.ensure()
     spin.succeed("Session ready")
 
-    await vm.claude(join(root, session.worktree))
+    await vm.claude(session.worktree)
   })
 
 // ── sandlot close <branch> ───────────────────────────────────────────
@@ -102,11 +102,10 @@ program
 const closeAction = async (branch: string) => {
   const root = await git.repoRoot()
   const session = await state.getSession(root, branch)
-  const worktreeRel = session?.worktree ?? `.sandlot/${branch}`
-  const worktreeAbs = join(root, worktreeRel)
+  const worktreeAbs = session?.worktree ?? join(homedir(), '.sandlot', basename(root), branch)
 
   await git.removeWorktree(worktreeAbs, root)
-  console.log(`Removed worktree ${worktreeRel}/`)
+  console.log(`Removed worktree ${worktreeAbs}/`)
 
   await git.deleteLocalBranch(branch, root)
   console.log(`Deleted local branch ${branch}`)
@@ -157,7 +156,7 @@ program
       process.exit(1)
     }
 
-    const worktreeAbs = join(root, session.worktree)
+    const worktreeAbs = session.worktree
 
     const spin = spinner("Starting VM")
     await vm.ensure()

src/vm.ts

@@ -15,7 +15,7 @@ export async function ensure(): Promise<void> {
 
   // Create from scratch
   const home = homedir()
-  await $`limactl create --name=${VM_NAME} --mount=${home}/dev:w template:ubuntu-24.04`.quiet()
+  await $`limactl create --name=${VM_NAME} --mount=${home}/dev --mount=${home}/.sandlot:w template:ubuntu-24.04`.quiet()
   await $`limactl start ${VM_NAME}`.quiet()
 
   // Provision