Daily AI Builder Brief - April 29, 2026

Executive Summary

Claude Code 2.1.123 fixes an OAuth 401 retry loop triggered by CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1.
Claude Code 2.1.122 adds ANTHROPIC_BEDROCK_SERVICE_TIER (default/flex/priority) and /resume lookup by pasted PR URL.
Claude Code 2.1.121 adds alwaysLoad to MCP server config so chosen tools skip tool-search deferral.
Auto mode is now live for Max subscribers on Opus 4.7, plus a new xhigh effort level between high and max.
New /ultrareview control, claude plugin prune, and a type-to-filter search in /skills.
Anthropic ships Claude for Creative Work: 9 connectors covering Adobe, Blender, Autodesk Fusion, Ableton, Splice, SketchUp, Affinity by Canva, Resolume Arena, Resolume Wire.
Affinity launches a hosted MCP server connecting its CRM to Claude, Gemini, Copilot, and ChatGPT.

Claude Code

2.1.123: OAuth 401 retry loop fix

Auth no longer loops when experimental betas are disabled via env var. (changelog)

2.1.122: Bedrock service tier + PR-aware /resume

Set ANTHROPIC_BEDROCK_SERVICE_TIER to pick default, flex, or priority. Pasting a PR URL into /resume finds the session that produced it across GitHub, GHE, GitLab, and Bitbucket. Image cap restored to 2000px for newer models. (changelog)

2.1.121: alwaysLoad, plugin prune, /effort slider

alwaysLoad: true on an MCP server keeps its tools out of the deferred pool. claude plugin prune removes orphaned auto-installed plugin deps. /effort without args opens an interactive slider; Opus 4.7 gains xhigh; Max users get Auto mode. (changelog)

Anthropic

Claude for Creative Work

9 connectors land at once: Adobe Creative Cloud (50+ tools), Blender (natural language to its Python API), Autodesk Fusion 3D modeling, Ableton, Splice, SketchUp, Affinity by Canva, Resolume Arena, Resolume Wire. Education partners include RISD, Ringling, and Goldsmiths. (announcement)

MCP Ecosystem

Affinity hosted MCP server

Affinity's relationship-intelligence CRM exposes deal and contact data as a hosted MCP server. Works with Claude, Gemini, Copilot, ChatGPT. No self-hosting required. (release)

Broader AI

Nothing today.

What This Means For Builders

If you ship MCP servers, ship an alwaysLoad recommendation in your install docs for tools agents need on every turn.
Bedrock users on flex pricing can now pin tier per session via env var; useful for cost-sensitive batch agents.
The PR-to-session lookup in /resume rewards consistent branch and commit hygiene; sessions become git-discoverable artifacts.
Creative connectors expand Claude's surface beyond code; if your product has a public API, an MCP wrapper is now the cheapest path to AI-tool distribution.