CLI --add-dir flags not forwarded to Claude Code

[FurlanLuka]

Problem

When passing --add-dir flags to happy, they are not forwarded to the underlying Claude Code process. Claude Code starts but only has access to the primary working directory.

# Works — Claude sees all dirs:
claude --add-dir /path/to/other-repo "prompt"

# Broken — Claude only sees cwd:
happy --add-dir /path/to/other-repo "prompt"

The agent confirms only the primary working directory is configured:

"I don't see any extra directories configured in this session — only api is in my working context."

Additional finding

Positional prompt arguments are also not working:

happy --add-dir /tmp "test"
# → Error: Input must be provided either through stdin or as a prompt argument when using --print

Root cause

Traced through the source:

1. index.ts — --add-dir is correctly captured in unknownArgs → options.claudeArgs ✅
2. runClaude.ts → loop() → Session — claudeArgs flows through ✅
3. claudeLocalLauncher.ts → claudeLocal.ts — args.push(...opts.claudeArgs) ✅
4. claudeRemote.ts — claudeArgs are NOT passed to the SDK query() call ❌

The SDK's QueryOptions in query.ts has no additionalDirs or equivalent option. When happy switches to remote mode (which happens when the message queue has items), --add-dir is silently dropped.

Even in local mode, the positional prompt arg appears to not reach Claude correctly through the launcher chain.

Proposed fix

1. Add additionalDirs?: string[] to QueryOptions in query.ts, mapping to --add-dir flags
2. In claudeRemote.ts, extract --add-dir values from claudeArgs and pass them as additionalDirs
3. Ensure positional prompt args work through the local launcher path

Environment

• happy: latest (npm)
• Claude Code: v2.1.63 (Homebrew)
• OS: macOS + Ubuntu (same behavior on both)