Claude Code is shipping at a weekly pace. After 2.1.90 brought the /powerup tutorials, the past few days delivered 2.1.91 and 2.1.92 — and both pack things that actually change the day-to-day.
Persistent MCP tool results
The headline feature in 2.1.91: MCP tools can now persist their results. Through the annotation _meta['anthropic/maxResultSizeChars'], you can push the per-call size limit up to 500,000 characters. Anyone working with larger payloads via MCP — logs, database dumps, entire code repositories — knows the old problem. Results would get truncated too aggressively or never make it through at all. With the new persistence logic, they stay available even as the context grows.
On top of that you get multi-line deep links, better shell execution controls and bug fixes for plan mode and transcript handling.
Interactive Bedrock login
2.1.92 adds a new login wizard for AWS Bedrock. Instead of fighting with AWS credentials and region strings, you click through a setup at startup that picks the auth method, sets the region and registers the right models. For anyone running Claude Code in enterprise environments via Bedrock, that is a real quality-of-life upgrade.
Write tool 60% faster
The quiet star of this release sits under the hood: the diff calculation in the Write tool got optimized. For sessions that write a lot to large files — especially ones with tabs and special characters — Anthropic reports a roughly 60 percent speed increase. If you regularly point Claude Code at big codebases, you should feel the difference immediately.
There are also 21 additional CLI changes, 10 flag changes, and the option to block CLI startup until remote settings have been freshly loaded.
My take
2.1.91 and 2.1.92 are not spectacular feature drops, but they are exactly the kind of update that matters in daily use. MCP persistence solves a concrete problem, the Bedrock wizard lowers the barrier to entry, and the Write performance is one of those things you do not notice — until it is there.