MCP structuredContent deduplication and data loss fix
Cluster 115430. Data as of
Nothing open on GitHub. Fix merged in #116693 on 20 Sep 2026. Check it covers your case.
The short answer
- Known?
- Yes. 3 related items grouped here, 1 issue already closed.
- Fix event
- A fix was merged to main in PR #116693. Check it covers your case. No release data is tracked.
- Tracker
- The maintainers' tracker marks this
resolved, deciding PR #116693. That is separate from the fix event. - Still open
- Nothing open on GitHub.
These items address a bug where MCP structuredContent was incorrectly discarded when text content was present. The fix narrows deduplication to only remove structuredContent when it is a verbatim JSON duplicate of the text block, preserving it otherwise.
Open issues0
Open PRs0
Fixes on record
-
#116693 fix(mcp): structuredContent is kept when the text block is only a summary; only verbatim JSON duplicates are deduped (#115430, salvage #115445)
files:
tests/tools/test_mcp_structured_content.py,tools/mcp_tool_handlers.py
1 PR closed without merging
From the close comments: merged via another change 1
-
#115445 fix(mcp): keep structuredContent unless content is its verbatim JSON dual-emit · merged via another change →
bfb3b1a,#116693,#115430,#115445
Closed issues · 1
- Closed#115430[Bug]: MCP structuredContent is discarded whenever text content is present, causing data loss
How this cluster was grouped
-
Link evidence (
structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference. -
Pairwise link density
0.67: the share of item pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36.1.00means every pair is linked.
Pick up a Lab task
Check whether a fix covers the open issues here, with your own agent. Bring back evidence for maintainers.
Open the LabAt a glance
- Merged PRs
- #116693
- Closed issues
- 1
- Attempts
- 1 PR closed without merging
- Fix link checked
- 20 Sep 2026