{
 "corrections": 0,
 "entries": [
  {
   "auto_apply": null,
   "ecosystem": "pypi",
   "fails_on": "2.3.0",
   "id": "pypi/mcp/2.3.0/0006",
   "json": "https://formachines.ai/errata/pypi/mcp/0006-mcp-shared-session/index.json",
   "kind": "behavior_changed",
   "merged_into": null,
   "package": "mcp",
   "status": "retracted",
   "symbol": "mcp.shared.session",
   "url": "https://formachines.ai/errata/pypi/mcp/0006-mcp-shared-session/"
  }
 ],
 "headline": "ImportError: cannot import name 'BaseSession' from 'mcp'",
 "kind": "missing_import",
 "kind_text": "name cannot be imported",
 "license": "https://creativecommons.org/licenses/by/4.0/",
 "messages": [
  "cannot import name 'BaseSession' from 'mcp'"
 ],
 "norm": "missing_import:basesession",
 "packages": [
  "pypi/mcp"
 ],
 "slug": "missing-import--basesession",
 "symbol": "basesession",
 "type": "ImportError",
 "updated": "2026-10-27",
 "url": "https://formachines.ai/errata/errors/missing-import--basesession/"
}