fix: set cwd to /vercel/sandbox/mono for Claude Code agent

[sweetmantech]

Summary

• Hardcodes cwd: "/vercel/sandbox/mono" in runClaudeCodeAgent so Claude Code always executes from inside the cloned monorepo
• Without this, commands ran from /vercel/sandbox (the Vercel Sandbox default), missing CLAUDE.md and git context

Test plan

• Added test asserting cwd is always set to /vercel/sandbox/mono
• Updated existing exact-match tests to include the new cwd field
• All 7 tests pass

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores

  • Configured the Claude code agent to operate from a consistent working directory.

• Tests

  • Updated tests to validate working directory configuration behavior.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 335807cd-73d7-463b-8fb6-e515e106701b

📥 Commits

Reviewing files that changed from the base of the PR and between e5134b1 and bed4ee0.

📒 Files selected for processing (3)

• src/sandboxes/__tests__/runClaudeCodeAgent.test.ts
• src/sandboxes/cloneMonorepoViaAgent.ts
• src/sandboxes/runClaudeCodeAgent.ts

📝 Walkthrough

Walkthrough

This change enforces a fixed working directory for Claude code agent CLI invocations by adding cwd: "/vercel/sandbox/mono" to the command options in runClaudeCodeAgent. The test file is updated to verify this behavior with expectation assertions.

Changes

Cohort / File(s)	Summary
Working Directory Configuration src/sandboxes/runClaudeCodeAgent.ts	Adds cwd: "/vercel/sandbox/mono" to commandOpts passed to sandbox.runCommand.
Test Updates src/sandboxes/__tests__/runClaudeCodeAgent.test.ts	Updates two existing tests to expect the cwd field and introduces a new test validating default cwd behavior (22 lines added).

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related PRs

• feat: inject CLAUDE_CODE_OAUTH_TOKEN into sandbox environment #86: Modifies the same runClaudeCodeAgent function but adjusts CLAUDE_CODE_OAUTH_TOKEN merging into the command environment.

Poem

🐰 A bunny hops through sandy paths so clear,
Setting waypoints, working directories appear,
/vercel/sandbox/mono now the constant home,
No matter where commands wander or roam! 🌟

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically describes the main change: setting the working directory to /vercel/sandbox/mono for the Claude Code agent, which is the core fix implemented across the modified files.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/claude-code-cwd

📝 Coding Plan

• Generate coding plan for human review comments

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[coderabbitai]

🧹 Nitpick comments (1)

src/sandboxes/runClaudeCodeAgent.ts (1)

34-43: Use a module constant for the workdir literal to reduce drift.

"/vercel/sandbox/mono" is now a behavior-critical value. Consider extracting it to a local constant so future edits are less error-prone.

♻️ Suggested refactor

+const CLAUDE_CODE_WORKDIR = "/vercel/sandbox/mono";
+
 export async function runClaudeCodeAgent(
   sandbox: Sandbox,
   options: RunClaudeCodeAgentOptions,
 ): Promise<RunClaudeCodeAgentResult> {
@@
   const commandOpts: Record<string, unknown> = {
     cmd: "claude",
     args,
-    cwd: "/vercel/sandbox/mono",
+    cwd: CLAUDE_CODE_WORKDIR,
     detached: true,
     env: {
       ...env,
       CLAUDE_CODE_OAUTH_TOKEN: process.env.CLAUDE_CODE_OAUTH_TOKEN,
     },
   };

As per coding guidelines, "Extract shared logic into reusable utilities to follow DRY (Don't Repeat Yourself)".

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@src/sandboxes/runClaudeCodeAgent.ts` around lines 34 - 43, The work directory
string "/vercel/sandbox/mono" used in the commandOpts object is
behavior-critical and should be a module-level constant to avoid drift; add a
descriptive constant (e.g., DEFAULT_WORKDIR or CLAUDE_WORKDIR) near the top of
src/sandboxes/runClaudeCodeAgent.ts and replace the literal in the
commandOpts.cwd assignment with that constant (ensure any other occurrences in
this file use the same constant so runClaudeCodeAgent and commandOpts reference
a single source of truth).

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In `@src/sandboxes/runClaudeCodeAgent.ts`:
- Around line 34-43: The work directory string "/vercel/sandbox/mono" used in
the commandOpts object is behavior-critical and should be a module-level
constant to avoid drift; add a descriptive constant (e.g., DEFAULT_WORKDIR or
CLAUDE_WORKDIR) near the top of src/sandboxes/runClaudeCodeAgent.ts and replace
the literal in the commandOpts.cwd assignment with that constant (ensure any
other occurrences in this file use the same constant so runClaudeCodeAgent and
commandOpts reference a single source of truth).

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 92aeb347-5594-4503-9598-23a1c956edda

📥 Commits

Reviewing files that changed from the base of the PR and between 70f345c and e5134b1.

📒 Files selected for processing (2)

• src/sandboxes/__tests__/runClaudeCodeAgent.test.ts
• src/sandboxes/runClaudeCodeAgent.ts