Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
Tooling ArchitectureArea: what it touches
Internal ChangesKind: in v2.1.265,
Internal ChangesSection of the release
What
A batch of built-in tools, including task-killing tools, MCP resource listing and reading, MCP web search, and several self-hosted runner admin tools (pool status, pool sessions, pool secrets, runner list, session requeue), were rewritten internally. They now build their logic once from shared session context rather than receiving that context separately on every call.
Why
This is an internal code structure change with no described effect on behavior. It does not change what these tools do for the reader.
