[Bug] `/ask` mode fails with Claude Code 2.1.80: `--allowedTools ""` causes prompt argument to be ignored

[yicheny]

Description

When using /ask in Discord, the agent always returns:

❌ Error: Input must be provided either through stdin or as a prompt argument when using --print

This happens regardless of what prompt text is entered. /code works fine.

Root Cause

In the source code, askModeArgs is set to ["--allowedTools", ""]. When Claude Code is invoked in auto permission mode, the final command becomes:

claude -p --output-format stream-json --verbose --allowedTools "" "actual prompt here"

Claude Code 2.1.80 treats the empty string "" from --allowedTools as the positional prompt argument, causing the actual prompt to be silently dropped. This results in the "Input must be provided" error.

Reproduction

# This fails:
claude -p --output-format stream-json --verbose --allowedTools "" "hello"
# Error: Input must be provided either through stdin or as a prompt argument when using --print

# This works:
claude -p --output-format stream-json --verbose "hello"
# Returns response correctly

Environment

• @doctorwu/agent-inbox: 1.2.5
• Claude Code: 2.1.80
• Node: v24.14.0
• Platform: macOS (arm64)
• IM: Discord

Workaround

Change all askModeArgs assignments in dist/index.mjs from ["--allowedTools", ""] to [].

Suggested Fix

In the source code, either:

1. Remove --allowedTools "" from ask mode args entirely, or
2. Only include --allowedTools when a non-empty value is provided