Daily AI Builder Brief - May 6, 2026

Executive Summary

Claude Code 2.1.131 fixes a Windows VS Code activation bug and a Mantle auth header regression.
Claude Code 2.1.129 adds --plugin-url for session-scoped plugin loading and gates gateway model discovery behind an env var.
Anthropic shipped 10 finance agent templates as Cowork/Code plugins and Managed Agents cookbooks.
Moody's MCP app plus 8 new data connectors land in Claude for financial workflows.
Claude add-ins for Excel, PowerPoint, and Word hit GA; Outlook is next.
Memory on Managed Agents enters public beta with cross-session state.
Plugin manifest format change: declare themes and monitors under experimental.
Jama Software shipped the first engineering management MCP server in Connect 9.35.

Claude Code

2.1.131 ships Windows VS Code and Mantle auth fixes

A hardcoded build path in the bundled SDK broke createRequire on Windows. The Mantle endpoint was sending requests without x-api-key. Both patched. Changelog

2.1.129 adds session plugins and tightens defaults

--plugin-url <url> pulls a plugin .zip for the current session only. CLAUDE_CODE_FORCE_SYNC_OUTPUT=1 covers terminals where auto-detection misses, like Emacs eat. Gateway /v1/models discovery is now opt-in via CLAUDE_CODE_ENABLE_GATEWAY_MODEL_DISCOVERY=1 (was automatic in 2.1.126 to 2.1.128). Plugin manifests should move themes and monitors under "experimental". Ctrl+R defaults back to all-projects history; Ctrl+S narrows to current project. Changelog

Anthropic

Ten finance agent templates plus Microsoft 365 add-ins

Pitchbook builders, KYC screeners, month-end closers. Each ships three ways: Cowork plugin, Code plugin, Managed Agents cookbook. Eight new connectors: Dun & Bradstreet, Fiscal AI, Financial Modeling Prep, Guidepoint, IBISWorld, SS&C IntraLinks, Third Bridge, Verisk. Excel, PowerPoint, Word add-ins are GA; Outlook coming. Adopters include Citadel, FIS, BNY, Carlyle, Mizuho, Travelers, Walleye. Anthropic news

Memory on Managed Agents in public beta

Cross-session learning for cloud-hosted agents on the Claude Platform. Pricing stays at 8 cents per agent runtime hour plus model usage. Managed Agents docs

MCP Ecosystem

Moody's ships an MCP app for Claude

Announced as part of the finance launch. Moody's data flows into Claude via the protocol, not a custom integration. Anthropic news

Jama Connect 9.35 ships first engineering MCP server

Traceability across Claude, Codex, Cursor, and Copilot, with Jama's permissions, lifecycle workflows, and audit enforced through the server rather than bypassed by the LLM. Jama announcement

Broader AI

Nothing today.

What This Means For Builders

If you ship plugins, move themes and monitors under experimental now to clear the validator warning before it becomes an error.
The Managed Agents memory beta closes the cross-session state gap. Worth piloting before your next agent build.
For regulated workflows, prefer vendor MCP servers (Moody's, Jama) over hand-rolled connectors so audit and permissions ride along automatically.
Pin Claude Code to 2.1.131 if you've got Windows VS Code users. Versions 2.1.126 to 2.1.128 had silent gateway model discovery you may not want.