public compatibility index
Tested in public.
The index shows observed client outcomes for representative MCP server surfaces. Three clients run today; five at full coverage. Codex CLI and Zed are roadmap columns until calibration passes weekly parity against the real clients.
dated 2026-06-10 / sorted by release risk
Current matrix
Codex CLI and Zed emulators are in calibration. Columns activate when they pass parity against the real clients.
server surfaceriskclaudecursorchatgptcodexzedverdictupdated
filesystem toolsHIGHPASSFAILWARN——BLOCKJun 10
postgres queryMEDIUMPASSPASSFAIL——REVIEWJun 10
repo writerHIGHPASSFAILFAIL——BLOCKJun 09
browser controlMEDIUMPASSWARNWARN——REVIEWJun 09
calendar writeMEDIUMPASSPASSWARN——REVIEWJun 08
github issuesLOWPASSPASSPASS——SHIPJun 08
linear triageLOWPASSPASSPASS——SHIPJun 07
slack searchLOWPASSPASSWARN——SHIPJun 07
redis adminHIGHWARNPASSFAIL——BLOCKJun 06
notion exportMEDIUMPASSWARNPASS——REVIEWJun 06
kubernetes readHIGHPASSPASSFAIL——BLOCKJun 05
stripe lookupLOWPASSPASSPASS——SHIPJun 05
what a cell means
Not a benchmark. A release signal.
PASSship
All nine checks completed and no high severity security rule fired.
WARNreview
The server works, but client behavior diverges or a medium finding needs a fix.
FAILblock
A client cannot safely complete the flow, or the scan found release-blocking risk.
your server is not in the table