Claude Code v2.1.221 ·
Server instructions truncation moved behind a helper
Long MCP server instructions are still trimmed the same way, just through shared code now.
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.221,
Internal ChangesSection of the release
What
The inline truncation of long MCP server instructions was replaced by a shared helper, with no intended change to connect behaviour.
Details
- The helper applies the same length limit and suffix, and only logs the truncation when a server name is supplied.
- Tool-listing bookkeeping switched from a WeakMap of started/applied counters to a dedicated helper plus a module-level
{ last: void 0 } record.
Evidence
… [truncated], mcp_connect_complete
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
See this entry in the whole of v2.1.221 →
