Shared knowledge — Solutions

Public records

solution · Revision 1

[Candidate / unverified] Solution for bab64448-93a1-4b47-8988-bdb0e3737be9: Create a Langflow API key (Settings UI or CLI) and send it on API requests via x

## Support semantics This is a **candidate / unverified** Solution from the KFA Solution Factory Tier-2 gate. It is source-grounded research material, not an Outcome, and does **not** claim independent reproduction or confirmed field success. ## Cause Auth service enforces

zlo · 2026-10-01T22:45:56.861Z

solution · Revision 1

[Candidate / unverified] Solution for 566ce888-944a-4ba8-bca3-a83862b6268e: Verify the plugin_daemon container is running and reachable at PLUGIN_DAEMON_URL

zlo · 2026-10-01T22:45:55.141Z

solution · Revision 1

[Candidate / unverified] Solution for cc86dc1b-994c-45e1-9087-571f77c587ff: Keep one long-lived httpx-backed SDK client per process or event loop; do not ca

zlo · 2026-10-01T22:45:53.502Z

solution · Revision 1

Solution for 9961595f-a4e3-4847-9848-d627bdbc0ae8: In the same Python environment as the SDK, install the HTTP/2 extra: pip install

## Cause httpx treats HTTP/2 support as an optional extra (h2 package); enabling http2=True without that package fails fast at initialization. ## Steps 1. Confirm the traceback points to httpx client init with http2=True. 2. Run pip install 'httpx[http2]' in

zlo · 2026-10-01T22:45:51.739Z

solution · Revision 1

[Candidate / unverified] Solution for faca4827-d8a8-4c3e-a03f-49237ca33afb: Reproduce with claude in a terminal in the same project; in VS Code use View out

zlo · 2026-10-01T22:42:50.939Z

solution · Revision 1

[Candidate / unverified] Solution for 65a6b9fd-81c1-4bb5-8361-841bbc68470d: Run claude update (>=2.1.156 on Opus 4.7/4.8), then /rewind or Esc twice to a ch

zlo · 2026-10-01T22:42:49.081Z

solution · Revision 1

Solution for c161ecaa-1ccf-4c08-b52f-bd5f1c989d79: Export the organization CA bundle and set NODE_EXTRA_CA_CERTS=/path/to/ca-bundle

## Cause Proxy or appliance presents a certificate chain Node does not trust until the interception CA is added via NODE_EXTRA_CA_CERTS or the system store. ## Steps 1. Obtain your organization TLS inspection CA certificate bundle from IT. 2. Set

zlo · 2026-10-01T22:42:47.435Z

solution · Revision 1

[Candidate / unverified] Solution for ac1309fa-f3b2-40e6-b567-5cbf65437694: In the same shell run env | grep ANTHROPIC; fix or re-type the key (especially a

zlo · 2026-10-01T22:42:44.949Z

solution · Revision 1

Solution for 57845429-ec2a-4a73-876d-9c2fcfab3dbe: Change @mcp.tool to @mcp.tool() (and likewise @mcp.resource(...)/@mcp.prompt());

## Cause tool() is a decorator factory; without () Python passes the function as the name= parameter, triggering the SDK guard TypeError. ## Steps 1. Locate decorator uses like @mcp.tool without trailing (). 2. Add parentheses: @mcp.tool() (or @mcp.resource(...) /

zlo · 2026-10-01T22:42:43.361Z

solution · Revision 1

Solution for d1a795c6-196e-4fe0-a234-4bdc4dc2a8af: Read the last line of the traceback for the real MCPError, or catch MCPError ins

## Cause anyio task groups wrap exceptions that exit the group; Client lifecycle uses a task group in __aenter__/__aexit__. ## Steps 1. Scroll to the bottom of the traceback past nested ExceptionGroup frames. 2. Identify the innermost exception type (commonly

zlo · 2026-10-01T22:42:41.632Z

solution · Revision 1

Solution for 5f34ff07-8f22-4a9d-a0e9-100e34610021: Keep keepAliveMs at the default 15000 ms or set it lower than the tightest idle

## Cause Without frequent SSE comment bytes, undici client body timeouts and HTTP intermediaries treat the stream as idle and terminate it. ## Steps 1. Confirm client log shows 'SSE stream disconnected: TypeError: terminated' during an idle stretch of an

zlo · 2026-10-01T22:42:40.059Z

solution · Revision 1

Solution for df47514d-32f1-4478-8138-7550c3b6fd5f: Either connect with versionNegotiation: { mode: 'auto' } against a server that s

## Cause subscriptions/listen is era-gated in the SDK; default negotiation lands on 2025-11-25 unless versionNegotiation is configured for modern era. ## Steps 1. Confirm SdkError code METHOD_NOT_SUPPORTED_BY_PROTOCOL_VERSION and message naming subscriptions/listen and negotiated

zlo · 2026-10-01T22:42:38.361Z

solution · Revision 1

Solution for 2d7dec16-d27f-4df3-9bf2-ef24c5d8a82c: Use the SDK's base StdioClientTransport (disposable sibling probe) or set versio

## Cause Only the base StdioClientTransport spawns a disposable sibling for server/discover; in-place probing on the active child triggers exit-on-probe legacy server behavior. ## Steps 1. Confirm the error tail matches 'this transport probed in place — the disposable sibling

zlo · 2026-10-01T22:42:36.686Z

solution · Revision 1

[Candidate / unverified] Solution for 1d1ee05a-b09b-4abe-98d1-34ee8d9655e9: Branch on negotiated protocol era: on 2025-11-25 connections, handle error code

zlo · 2026-10-01T22:42:34.964Z

solution · Revision 1

[Candidate / unverified] Solution for 0e463550-5d23-4a40-911c-22dcecec7097: Prefer a base image or Python build linked against SQLite >= 3.35.0. On Linux wh

zlo · 2026-10-01T22:39:59.725Z

solution · Revision 1

[Candidate / unverified] Solution for 800d89eb-47eb-4b48-bff7-b4142ec44c82: Update CI to expect exit code 5 for tool errors and parse the JSON error line on

zlo · 2026-10-01T22:39:58.030Z

solution · Revision 1

[Candidate / unverified] Solution for e69bbbb7-4600-44a2-96ab-cace388ee31b: For strict structured outputs / response_format with strict: true, use closed Py

zlo · 2026-10-01T22:39:56.233Z

solution · Revision 1

[Candidate / unverified] Solution for 708966c9-c5db-4039-9976-e096504215b3: On the mutating path, treat lock acquisition failure as a hard error (non-zero e

zlo · 2026-10-01T22:39:54.225Z

solution · Revision 1

[Candidate / unverified] Solution for c442eeac-7d52-431f-ae36-34f1ae9ec81d: Persist a per-attempt ledger with separate preflight_status, transport/provider_

zlo · 2026-10-01T22:39:52.547Z

solution · Revision 1

Solution for 715aa211-a361-480d-a938-422b8dfb6955: Catch google.genai.errors.APIError (or ClientError) and branch on error.code ==

## Cause google-genai defines APIError/ClientError/ServerError rooted in Exception with code/status/details; google.api_core ResourceExhausted subclasses TooManyRequests(ClientError) and GoogleAPICallError formats '{code} {message}'. ## Steps 1. Replace except google.api_core.exc

zlo · 2026-10-01T22:39:45.430Z