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fix(transport): prioritize system-wide CLI over bundled binary in _find_cli #970

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fix(transport): prioritize system-wide CLI over bundled binary in _find_cli #970

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18 changes: 12 additions & 6 deletions src/claude_agent_sdk/_internal/transport/subprocess_cli.py
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Original file line number Diff line number Diff line change
Expand Up @@ -79,13 +79,14 @@ def __init__(
self._write_lock: anyio.Lock = anyio.Lock()

def _find_cli(self) -> str:
"""Find Claude Code CLI binary."""
# First, check for bundled CLI
bundled_cli = self._find_bundled_cli()
if bundled_cli:
return bundled_cli
"""Find Claude Code CLI binary.

# Fall back to system-wide search
Searches in priority order:
1. System-wide PATH (allows users to override bundled binary)
2. Common installation locations
3. Bundled CLI (fallback)
"""
# First, check for system-wide CLI (PATH and common locations)
if cli := shutil.which("claude"):
return cli

Expand All @@ -102,6 +103,11 @@ def _find_cli(self) -> str:
if path.exists() and path.is_file():
return str(path)

# Fall back to bundled CLI if no system-wide installation found
bundled_cli = self._find_bundled_cli()
if bundled_cli:
return bundled_cli

raise CLINotFoundError(
"Claude Code not found. Install with:\n"
" npm install -g @anthropic-ai/claude-code\n"
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