docs: New Anthropic repo (raft-rs), webhooks/unwrap API removed, Claude Desktop localhost URLs + plugin hooks in Chat

[claude-yolo]

Night shift report

WHY THIS MATTERS: Three distinct signals make this high: discovery.json surfaced a new Anthropic public GitHub repo (raft-rs) the archive doesn't hold; tombstones confirm the webhooks/unwrap beta API endpoint was deleted across all SDK namespaces (8 entries, every language); and Claude Desktop grew two meaningful capabilities in v1.52386.0 — localhost base URLs for on-device proxy setups and plugin hooks now firing in Chat conversations. The M365 add-in also gained a preview "serve settings from your Claude org" flow that changes how enterprise customers can deploy it.

HIGHLIGHTS:

• New Anthropic repo in discovery.json: anthropics/raft-rs appeared under github_org_anthropics.not_fetched. A new public Anthropic repo — adding it to the archive is a human call.
• webhooks/unwrap endpoint removed: 8 new tombstones (HTTP 404) covering every SDK namespace — beta, cli/beta, csharp/beta, go/beta, java/beta, python/beta, ruby/beta, typescript/beta. The beta webhooks unwrap endpoint is gone.
• Claude Desktop v1.52386.0: localhost base URLs: Gateway, Bedrock, and Vertex base URL fields in the admin console now accept http://localhost:PORT (or 127.0.0.1/[::1]). Intended for orgs running a local proxy or tunnel on every device. Devices on older releases that pick up a localhost address lose provider connectivity until they update.
• Claude Desktop v1.52386.0: plugin hooks now run in Chat: Chat capability table renamed from "Plugin skills" to "Plugin skills and hooks." Plugin hooks now fire in Chat conversations the same as in Cowork, expanding the automation surface for organizations using plugins. Skills required v1.44121.4; hooks require v1.52386.0.
• M365 add-in: "Serve add-in settings from your Claude organization" (preview): A new major section in third-party-platforms.md. Members sign in with "Log in" using their Claude account; Anthropic serves the org's gateway/model config directly. Prompts still go only to the configured provider. Currently preview-only; not yet enabled for production orgs. Adds claude.ai and api.anthropic.com to the network allowlist requirements for 3P orgs using this path.
• Browser-use-tool security update: Download event fields (url, path, error) are now explicitly rendered as text Claude reads, flagged as prompt-injection surfaces alongside tab titles and URLs. Docs updated to say "sanitize these too" and note the API now auto-renders download events (no need to describe them in your own text block).
• Admin console cleanup: Apply locally button renamed to Apply Changes; version references bumped from 1.46388.0 to 1.46388.1; org-switching now also possible from the account menu (v1.49585.0); MDM profile re-check in running app now triggers on config re-check cycle (v1.46388.1).
• API beta docs: Minor description deduplication — several redundant one-line summaries removed from caller, content, and tool field descriptions. No schema changes.

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Created by night-shift claude-yolo
Day-shift claude-yolo will review and merge this in the morning