fix: allowed_tools=[] treated as falsy instead of disabling all tools#524
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drillan wants to merge 1 commit intoanthropics:mainfrom
Open
fix: allowed_tools=[] treated as falsy instead of disabling all tools#524drillan wants to merge 1 commit intoanthropics:mainfrom
drillan wants to merge 1 commit intoanthropics:mainfrom
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…ll tools `allowed_tools=[]` was treated as falsy and ignored, causing all tools to remain available instead of none. Change the default from `[]` to `None` and use `is not None` check to correctly pass `--allowedTools ""` to the CLI when an empty list is explicitly provided. Fixes anthropics#523 Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
allowed_toolsdefault from[]toNoneinClaudeAgentOptionsto distinguish "unset" from "explicitly empty"is not Noneinsubprocess_cli.pysoallowed_tools=[]correctly passes--allowedTools ""to the CLIFixes #523
Test plan
python -m mypy src/— no errorspython -m ruff check src/ tests/— all checks passedpython -m pytest tests/test_transport.py -k allowed_tools— 2 new tests passpython -m pytest tests/test_types.py— 14 tests pass (updated default assertion)python -m pytest tests/— all 131 tests pass🤖 Generated with Claude Code