sdk

A Claude Code settings key, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.

Releases whose published page names sdk.

1. v2.1.305 20 Oct 2026
   A desktop host can set the name Claude Code's requests are sent under

   CLAUDE_CODE_ENTRYPOINT_ON_REQUESTS sets the name requests go out under, but only when CLAUDE_CODE_ENTRYPOINT is claude-desktop-3p

   found in this entry's text

2. v2.1.301 15 Oct 2026
   Tasks running elsewhere get their output handled differently; SDK MCP servers lose tools field

   Background tasks marked as running elsewhere now report a rewritten output path and a final response, and SDK-type MCP configs drop their tools list

   found in this entry's text

3. v2.1.301 15 Oct 2026
   SDK-type MCP servers can now be recognised as one of Claude Code's own servers

   A check that recognises a particular built-in session MCP server now also accepts SDK-type servers that meet several conditions

   found in this entry's text

4. v2.1.295 8 Oct 2026
   Disabled SDK MCP servers now report a "switched_off" status

   An MCP server supplied through the SDK that is disabled now reports its status as "switched_off" instead of "disabled"

   found in this entry's text

5. v2.1.292 6 Oct 2026
   MCP servers can stay out of automatic backgrounding with disableAutoBackground

   A new per-server disableAutoBackground field stops Claude Code from moving that MCP server's tool calls to the background

   found in this entry's text

6. v2.1.277 18 Sep 2026
   New prompt-source classification for message origin telemetry

   Internal telemetry now classifies where each message came from into one of nine categories

   found in this entry's text

7. v2.1.274 16 Sep 2026
   MCP server config now validates "sdk" type entries against an allowed channel

   MCP server configs of type "sdk" are now validated against an allowed channel before loading

   found in this entry's text

8. v2.1.274 16 Sep 2026
   New MCP tool metadata field describing the serving MCP server

   MCP tools now carry structured metadata identifying which server and source they came from, for security purposes

   found in this entry's text

9. v2.1.274 16 Sep 2026
   MCP server 'add' now rejects host-only transport types explicitly

   Adding host-only MCP server types (sdk, sse-ide, ws-ide) via config now fails with a clear error

   named in this entry, found in this entry's text

10. v2.1.274 16 Sep 2026
    MCP config 'sdk' server type now rejected outside SDK host registration

    MCP servers of type 'sdk' in config files are now rejected unless registered by the SDK itself

    named in this entry, found in this entry's text

11. v2.1.271 14 Sep 2026
    Background sessions (bg_session) now count as valid publish-context sessions

    Background sessions can now be used as a valid context for publishing

    found in this entry's text

12. v2.1.268 10 Sep 2026
    SDK-only MCP-server filtering relaxed for CCR-injected configs in remote/bridge contexts

    MCP server filtering in remote sessions now also allows non-SDK servers injected by CCR

    found in this entry's text

13. v2.1.260 3 Sep 2026
    Bridge SDK transcript forwarding now stamps assistant replies to their triggering user message

    SDK bridge sessions now stamp assistant replies with the user message that triggered them.

    found in this entry's text

14. v2.1.248 27 Aug 2026
    One-hour prompt cache decision reworked around overage

    Whether a one-hour prompt cache is allowed can now be overridden per agent and can ignore overage.

    found in this entry's text

15. v2.1.228 11 Aug 2026
    Agent SDK debug logs can go through the storage layer

    SDK debug logging tags a session id and can write through the storage layer when given one.

    found in this entry's text

16. v2.1.223 5 Aug 2026
    Programmatic submission of a queued feedback draft

    Scripts can now submit a queued feedback draft by id without opening the review dialog.

    found in this entry's text

17. v2.1.221 3 Aug 2026
    Headless MCP startup wait reworked

    Headless runs decide more carefully whether to wait for MCP servers before starting.

    found in this entry's text

18. v1.0.31 20 Jun 2025
    Documentation Updates

    found in this entry's text

No release's published evidence quotes this name. The ledger indexes the Evidence lines of every changelog on this site, so this says nobody here has ever quoted it; it says nothing about how old the name is.

The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.

Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the settings key does. All settings keys.