connect(prompt=...) followed by receive_messages() hangs indefinitely

[jeremy-newhouse]

Description

When using ClaudeSDKClient.connect(prompt='...') with a prompt argument, calling receive_messages() afterwards hangs indefinitely — no messages are ever yielded.

The working pattern is connect() (no prompt) followed by query(prompt) then receive_messages().

Steps to Reproduce

Hangs:

client = ClaudeSDKClient(options=options)
await client.connect(prompt='Say hello')  # With prompt
async for msg in client.receive_messages():  # Hangs forever
    print(type(msg).__name__)

Works:

client = ClaudeSDKClient(options=options)
await client.connect()  # No prompt
await client.query('Say hello')
async for msg in client.receive_messages():  # Yields messages
    print(type(msg).__name__)

Expected Behavior

Both patterns should work. connect(prompt=...) should be equivalent to connect() + query(prompt).

Environment

• claude-agent-sdk: 0.1.51
• Claude CLI: 2.1.86
• Python: 3.12
• OS: Linux (Docker)