Accept string form for worktree setup/teardown

Lifecycle config now takes either a multiline shell script string or an
array of commands, making it friendlier to edit in a textarea. Schema
parsing moved to Zod so coercion stays in one place.

docs/DEVELOPMENT.md

@@ -62,6 +62,18 @@ Pass either a DB directory or a `paseo.sqlite` file to `--db`. The script opens
 
 ## paseo.json service scripts
 
+`worktree.setup` and `worktree.teardown` accept either a multiline shell script or an array
+of commands. Both run sequentially.
+
+```json
+{
+  "worktree": {
+    "setup": "npm ci\ncp \"$PASEO_SOURCE_CHECKOUT_PATH/.env\" .env\nnpm run db:migrate",
+    "teardown": "npm run db:drop || true"
+  }
+}
+```
+
 Every `scripts` entry with `"type": "service"` receives these environment variables:
 
 | Variable                    | Value                                                                                                                     |

packages/server/src/utils/worktree.test.ts

@@ -5,7 +5,9 @@ import {
   deriveWorktreeProjectHash,
   deletePaseoWorktree,
   getScriptConfigs,
+  getWorktreeSetupCommands,
   getWorktreeTerminalSpecs,
+  getWorktreeTeardownCommands,
   isServiceScript,
   isPaseoOwnedWorktreeCwd,
   listPaseoWorktrees,
@@ -442,6 +444,79 @@ describe.skipIf(process.platform === "win32")("createWorktree", () => {
     expect(portValue).toBeGreaterThan(0);
   });
 
+  it("runs string setup scripts from paseo.json as a single shell command", async () => {
+    const paseoConfig = {
+      worktree: {
+        setup: 'greeting="hello from string setup"\necho "$greeting" > setup.log',
+      },
+    };
+    writeFileSync(join(repoDir, "paseo.json"), JSON.stringify(paseoConfig));
+    execSync('git add paseo.json && git -c commit.gpgsign=false commit -m "add string setup"', {
+      cwd: repoDir,
+    });
+
+    const result = await createLegacyWorktreeForTest({
+      branchName: "main",
+      cwd: repoDir,
+      baseBranch: "main",
+      worktreeSlug: "string-setup-test",
+      paseoHome,
+    });
+
+    expect(getWorktreeSetupCommands(result.worktreePath)).toEqual([
+      'greeting="hello from string setup"\necho "$greeting" > setup.log',
+    ]);
+    expect(readFileSync(join(result.worktreePath, "setup.log"), "utf8").trim()).toBe(
+      "hello from string setup",
+    );
+  });
+
+  it("treats blank lifecycle strings as empty", () => {
+    writeFileSync(
+      join(repoDir, "paseo.json"),
+      JSON.stringify({
+        worktree: {
+          setup: " \n\t ",
+          teardown: " \n ",
+        },
+      }),
+    );
+
+    expect(getWorktreeSetupCommands(repoDir)).toEqual([]);
+    expect(getWorktreeTeardownCommands(repoDir)).toEqual([]);
+  });
+
+  it("filters non-string and blank entries from lifecycle arrays", () => {
+    writeFileSync(
+      join(repoDir, "paseo.json"),
+      JSON.stringify({
+        worktree: {
+          setup: [
+            'echo "first" > setup-array.log',
+            null,
+            "   ",
+            'echo "second" >> setup-array.log',
+          ],
+          teardown: [
+            'echo "first" > "$PASEO_SOURCE_CHECKOUT_PATH/teardown-array.log"',
+            null,
+            "",
+            'echo "second" >> "$PASEO_SOURCE_CHECKOUT_PATH/teardown-array.log"',
+          ],
+        },
+      }),
+    );
+
+    expect(getWorktreeSetupCommands(repoDir)).toEqual([
+      'echo "first" > setup-array.log',
+      'echo "second" >> setup-array.log',
+    ]);
+    expect(getWorktreeTeardownCommands(repoDir)).toEqual([
+      'echo "first" > "$PASEO_SOURCE_CHECKOUT_PATH/teardown-array.log"',
+      'echo "second" >> "$PASEO_SOURCE_CHECKOUT_PATH/teardown-array.log"',
+    ]);
+  });
+
   it("does not run setup commands when runSetup=false", async () => {
     const paseoConfig = {
       worktree: {
@@ -858,6 +933,34 @@ describe("paseo worktree manager", () => {
     expect(teardownLog).toContain(`port=${runtimeEnv.PASEO_WORKTREE_PORT}`);
   });
 
+  it("runs string teardown scripts from paseo.json as a single shell command", async () => {
+    const paseoConfig = {
+      worktree: {
+        teardown:
+          'cleanup_message="teardown string"\necho "$cleanup_message" > "$PASEO_SOURCE_CHECKOUT_PATH/teardown.log"',
+      },
+    };
+    writeFileSync(join(repoDir, "paseo.json"), JSON.stringify(paseoConfig));
+    execSync('git add paseo.json && git -c commit.gpgsign=false commit -m "add string teardown"', {
+      cwd: repoDir,
+    });
+
+    const created = await createLegacyWorktreeForTest({
+      branchName: "teardown-string-branch",
+      cwd: repoDir,
+      baseBranch: "main",
+      worktreeSlug: "teardown-string-test",
+      paseoHome,
+    });
+
+    await deletePaseoWorktree({ cwd: repoDir, worktreePath: created.worktreePath, paseoHome });
+
+    expect(getWorktreeTeardownCommands(repoDir)).toEqual([
+      'cleanup_message="teardown string"\necho "$cleanup_message" > "$PASEO_SOURCE_CHECKOUT_PATH/teardown.log"',
+    ]);
+    expect(readFileSync(join(repoDir, "teardown.log"), "utf8").trim()).toBe("teardown string");
+  });
+
   it("omits PASEO_WORKTREE_PORT from teardown env when runtime metadata is missing", async () => {
     const paseoConfig = {
       worktree: {

packages/server/src/utils/worktree.ts

@@ -7,6 +7,7 @@ import net from "node:net";
 import { createHash } from "node:crypto";
 import * as pty from "node-pty";
 import stripAnsi from "strip-ansi";
+import { z } from "zod";
 import { buildStringCommandShellInvocation } from "./string-command-shell.js";
 import {
   normalizeBaseRefName,
@@ -20,22 +21,6 @@ import { resolvePaseoHome } from "../server/paseo-home.js";
 import { ensureNodePtySpawnHelperExecutableForCurrentPlatform } from "../terminal/terminal.js";
 import { parseGitRevParsePath, resolveGitRevParsePath } from "./git-rev-parse-path.js";
 
-interface PaseoConfig {
-  worktree?: {
-    setup?: string[];
-    teardown?: string[];
-    terminals?: WorktreeTerminalConfig[];
-  };
-  scripts?: Record<
-    string,
-    {
-      type?: unknown;
-      command?: unknown;
-      port?: unknown;
-    }
-  >;
-}
-
 const execFileAsync = promisify(execFile);
 const READ_ONLY_GIT_ENV: NodeJS.ProcessEnv = {
   ...process.env,
@@ -99,6 +84,49 @@ export interface WorktreeTerminalConfig {
   command: string;
 }
 
+function normalizeLifecycleCommands(commands: unknown): string[] {
+  if (typeof commands === "string") {
+    return commands.trim().length > 0 ? [commands] : [];
+  }
+  if (!Array.isArray(commands)) {
+    return [];
+  }
+  return commands.filter((command): command is string => {
+    return typeof command === "string" && command.trim().length > 0;
+  });
+}
+
+const LifecycleCommandsSchema = z.unknown().transform(normalizeLifecycleCommands);
+
+const WorktreeConfigSchema = z
+  .object({
+    setup: LifecycleCommandsSchema,
+    teardown: LifecycleCommandsSchema,
+    terminals: z.unknown().optional(),
+  })
+  .passthrough()
+  .catch({ setup: [], teardown: [] });
+
+const ScriptEntrySchema = z
+  .object({
+    type: z.unknown(),
+    command: z.unknown(),
+    port: z.unknown(),
+  })
+  .partial()
+  .passthrough()
+  .catch({});
+
+const PaseoConfigSchema = z
+  .object({
+    worktree: WorktreeConfigSchema.optional(),
+    scripts: z.record(z.string(), ScriptEntrySchema).optional().catch({}),
+  })
+  .passthrough()
+  .catch({});
+
+type PaseoConfig = z.infer<typeof PaseoConfigSchema>;
+
 export interface PlainScriptConfig {
   type?: undefined;
   command: string;
@@ -207,7 +235,7 @@ function readPaseoConfig(repoRoot: string): PaseoConfig | null {
     return null;
   }
   try {
-    return JSON.parse(readFileSync(paseoConfigPath, "utf8"));
+    return PaseoConfigSchema.parse(JSON.parse(readFileSync(paseoConfigPath, "utf8")));
   } catch {
     throw new Error(`Failed to parse paseo.json`);
   }
@@ -215,20 +243,12 @@ function readPaseoConfig(repoRoot: string): PaseoConfig | null {
 
 export function getWorktreeSetupCommands(repoRoot: string): string[] {
   const config = readPaseoConfig(repoRoot);
-  const setupCommands = config?.worktree?.setup;
-  if (!setupCommands || setupCommands.length === 0) {
-    return [];
-  }
-  return setupCommands.filter((cmd) => typeof cmd === "string" && cmd.trim().length > 0);
+  return config?.worktree?.setup ?? [];
 }
 
 export function getWorktreeTeardownCommands(repoRoot: string): string[] {
   const config = readPaseoConfig(repoRoot);
-  const teardownCommands = config?.worktree?.teardown;
-  if (!teardownCommands || teardownCommands.length === 0) {
-    return [];
-  }
-  return teardownCommands.filter((cmd) => typeof cmd === "string" && cmd.trim().length > 0);
+  return config?.worktree?.teardown ?? [];
 }
 
 export function getWorktreeTerminalSpecs(repoRoot: string): WorktreeTerminalConfig[] {

packages/website/src/routes/docs/worktrees.tsx

@@ -64,8 +64,8 @@ function Worktrees() {
         <Code>
           <pre className="text-white/80">{`{
   "worktree": {
-    "setup":    ["npm ci"],
-    "teardown": ["rm -rf .cache"]
+    "setup":    "npm ci",
+    "teardown": "rm -rf .cache"
   },
   "scripts": {
     "test": { "command": "npm test" },
@@ -88,17 +88,15 @@ function Worktrees() {
         <Code>
           <pre className="text-white/80">{`{
   "worktree": {
-    "setup": [
-      "npm ci",
-      "cp \\"$PASEO_SOURCE_CHECKOUT_PATH/.env\\" .env",
-      "npm run db:migrate"
-    ],
-    "teardown": [
-      "npm run db:drop || true"
-    ]
+    "setup": "npm ci\\ncp \\"$PASEO_SOURCE_CHECKOUT_PATH/.env\\" .env\\nnpm run db:migrate",
+    "teardown": "npm run db:drop || true"
   }
 }`}</pre>
         </Code>
+        <p className="text-white/60 leading-relaxed">
+          Both fields accept a multiline shell script or an array of commands; commands run
+          sequentially either way.
+        </p>
         <p className="text-white/60 leading-relaxed">
           Commands run with the worktree as <code className="font-mono">cwd</code>. Use{" "}
           <code className="font-mono">$PASEO_SOURCE_CHECKOUT_PATH</code> to reach files in the