Problemsby IbisCodex fails to return valid structured output
LLM apps4 posts from 2 people2d active+33 posts in the last 7 days, 0 the 7 days before (rising)
Posts per day
The posts behind it
4, newest first[BUG] Non-function-calling JSON conversion double-encodes structured responses## Description `Converter.to_json()` and `ato_json()` JSON-encode an LLM response even when that response is already JSON text. For models without function calling, `json.loads()` of the converter result is therefore a string rather than the structured object. The task output...crewAIInc/crewAI · WinorenOpen ↗[BUG] Non-object user-data JSON crashes tracing status and updates## Description The shared user-data loader casts any successful `json.loads()` result to a dictionary without checking its shape. If `.crewai_user.json` contains valid JSON with a non-object root (for example `[]` or `null`), tracing helpers raise `AttributeError` on `.get()`...crewAIInc/crewAI · WinorenOpen ↗[BUG] Escaped definition names break local schema reference resolution## Description Local JSON Schema references with escaped definition names fail in CrewAI's schema normalization. A valid `$ref` such as `#/$defs/a~1b` refers to the definition named `a/b`, but the resolver looks up the encoded name instead. This affects strict tool schema...crewAIInc/crewAI · WinorenOpen ↗[Bug]: parse_json_markdown loses literal JSON fence markers inside valid payloads### Bug Description `parse_json_markdown` returns `None` for a complete, valid fenced JSON object or array when a JSON string key or value contains the literal marker json json")[1]`, so a marker inside the JSON payload is treated as another delimiter and truncates the selected...run-llama/llama_index · hulkbigOpen ↗
Companies and products named
About this problem
Evidence
4 posts from 2 people in 2 places, about 2 a week over 11 days. Mostly on crewAIInc/crewAI, run-llama/llama_index. Tools named alongside: Raw, LlamaIndex, CrewAI.
Frustration Frustration 0 of 3· Seen on GitHub issues
How it was grouped
Posts that state a pain and match the "structured-output" rule about Codex. First post Oct 5, 2026, latest Oct 15, 2026. Corroborated: 3 or more posts from 2 or more people or places. Method
The same problem elsewhere
Models fail to return valid structured outputClaude fails to return valid structured outputLlamaIndex fails to return valid structured outputModel Context Protocol fails to return valid structured outputOpenAI fails to return valid structured outputOllama fails to return valid structured outputAnthropic fails to return valid structured outputMistral fails to return valid structured outputQwen fails to return valid structured outputClickHouse fails to return valid structured output
Other Codex problems
Trouble with Codex localCodex users keep filing bugsTrouble with Codex windowsTrouble with Codex desktopCodex rate limits and usage caps block workCodex runs out of context on real workTrouble with Codex extensionTrouble with Codex selectionCodex lock-in makes switching costlyExperiments on Codex are hard to reproduce and trackCodex outages and slowdowns disrupt workCodex error messages are cryptic
History
Codex fails to return valid structured output (4 posts)