openclaw - 💡(How to fix) Fix [Bug]: Agent text output delivered to Telegram even when agent uses only Bot API + NO_REPLY [1 participants]

Fix Plan

To resolve the issue of duplicate/garbage messages being delivered to the user, we need to modify the agent to suppress any text output before ending its turn with NO_REPLY.

Here are the concrete steps:

• Modify the agent code to buffer any text output during its turn.
• Only deliver the final formatted message via the Telegram Bot API (curl).
• Ensure that the agent ends its turn with NO_REPLY after delivering the final message.

Example code snippet (in Python):

# Initialize an empty buffer for text output
text_buffer = []

# During the agent's turn, append any text output to the buffer
text_buffer.append("Let me check...")

# Perform tool calls and other operations

# Deliver the final formatted message via Telegram Bot API (curl)
final_message = "Final answer: 42"
requests.post(
    f"https://api.telegram.org/bot{BOT_TOKEN}/sendMessage",
    json={"chat_id": chat_id, "text": final_message}
)

# End the turn with NO_REPLY
print("NO_REPLY")

In this example, any text output during the agent's turn is appended to the text_buffer list, but not delivered to the user. Only the final formatted message is delivered via the Telegram Bot API (curl), and the turn is ended with NO_REPLY.

Verification

To verify that the fix worked, test the agent in a multi-step scenario and check that:

• Only the final formatted message is delivered to the user.
• No intermediate text output is visible to the user.
• The agent ends its turn with NO_REPLY as expected.

Extra Tips

• Ensure that the streaming configuration is set to "off" to prevent any intermediate text output from being delivered to the user.
• Review the related issues (#13944, #15473, #25374, #50985, #50989) to ensure that this fix does not introduce any regressions.