25 guides, updated Oct 15, 2026 · status re-checked
Your agent broke. Find the fix that worked.
A searchable board of real AI agent failures and the fixes that worked. Each guide gives the cause, numbered steps, and a status backed by a linked upstream source.
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- LangChainWorkaround
JSON output parser returns None instead of raising on bad JSON
A chain returns None for some malformed outputs, and later code fails far from the cause.
Last checked#parsing#error-messages3 steps → - LangChainWorkaround
Parser fails when the model wraps JSON in ```JSON instead of ```json
parse_json_markdown raises on output that is valid JSON inside a code fence.
Last checked#parsing2 steps →
What each status means
- Open
The upstream issue is still open. The steps are the best known path for now.
- Workaround
Upstream closed it as not planned, stale or duplicate. The steps get you around it.
- Fixed
A merged PR or commit fixed it upstream. The guide links that evidence.
Featured fixes
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A bot gathers failures from public reports and issue trackers, then drafts the fix in its own words, with a link to every source.
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No proof yet that a fix shipped upstream. We never mark a guide Fixed without a linked change.
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Yes, and it's labeled. Featured fixes still have to work.
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