claude-code - 💡(How to fix) Fix [Bug] Subagent spawning consumes excessive token budget (30% of 5h limit) [1 comments, 2 participants]

[{"error":"Error: Streamable HTTP error: Error POSTing to endpoint: event: message\r\ndata: {"jsonrpc":"2.0","id":23,"error":{"code":-32600,"message":"Anthropic Proxy: Invalid content from server","data":null}}\r\n\r\n\n at send (/$bunfs/root/src/entrypoints/cli.js:834:36427)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-22T13:43:40.058Z"},{"error":"Error: Streamable HTTP error: Error POSTing to endpoint: event: message\r\ndata: {"jsonrpc":"2.0","id":21,"error":{"code":-32600,"message":"Anthropic Proxy: Invalid content from server","data":null}}\r\n\r\n\n at send (/$bunfs/root/src/entrypoints/cli.js:834:36427)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-22T13:43:40.095Z"},{"error":"Error: Streamable HTTP error: Error POSTing to endpoint: event: message\r\ndata: {"jsonrpc":"2.0","id":26,"error":{"code":-32600,"message":"Anthropic Proxy: Invalid content from server","data":null}}\r\n\r\n\n at send (/$bunfs/root/src/entrypoints/cli.js:834:36427)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-22T13:44:10.324Z"},{"error":"Error: Streamable HTTP error: Error POSTing to endpoint: event: message\r\ndata: {"jsonrpc":"2.0","id":36,"error":{"code":-32600,"message":"Anthropic Proxy: Invalid content from server","data":null}}\r\n\r\n\n at send (/$bunfs/root/src/entrypoints/cli.js:834:36427)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-22T13:44:58.157Z"},{"error":"Error: Streamable HTTP error: Error POSTing to endpoint: event: message\r\ndata: {"jsonrpc":"2.0","id":60,"error":{"code":-32600,"message":"Anthropic Proxy: Invalid content from server","data":null}}\r\n\r\n\n at send (/$bunfs/root/src/entrypoints/cli.js:834:36427)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-22T13:49:43.558Z"},{"error":"Error: Streamable HTTP error: Error POSTing to endpoint: event: message\r\ndata: {"jsonrpc":"2.0","id":68,"error":{"code":-32600,"message":"Anthropic Proxy: Invalid content from server","data":null}}\r\n\r\n\n at send (/$bunfs/root/src/entrypoints/cli.js:834:36427)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-22T13:54:26.295Z"}]

TL;DR

The issue may be related to the Anthropic Proxy returning invalid content, causing Streamable HTTP errors.

Guidance

• Investigate the Anthropic Proxy configuration and logs to determine why it's returning invalid content.
• Verify that the request payload being sent to the endpoint is correctly formatted and valid.
• Check the cli.js file at line 834 to see how the send function is handling errors and if there's a way to improve error handling.
• Consider adding retry logic or exponential backoff to handle temporary errors.

Example

No code example is provided as the issue is more related to configuration and error handling.

Notes

The issue seems to be related to the Anthropic Proxy, but without more information about the proxy configuration and the request being sent, it's difficult to provide a more specific solution.

Recommendation

Apply a workaround by adding retry logic or exponential backoff to handle temporary errors, as the root cause of the issue is unclear.