Claude Report — 2026-09-17

🚀 Anthropic Official

Claude Code v2.1.274 (Sep 17)

Adds a visible warning when memory usage turns critical, with steps to free memory or restart safely; improves connection handling for legacy HTTP+SSE MCP servers; fixes sessions getting stuck endlessly retrying "unexpected tool_use_id" 400 errors; and improves the artifact tool, VS Code session continuation after reload, and the Slack Claude Tag integration.

Claude Code v2.1.271 (Sep 14)

Adds fast mode for Claude Code Remote sessions (cloud and self-hosted runners), per-command allowed_domains for Bash/PowerShell/Monitor in auto mode, and improves artifact publishing and terminal rendering performance.

claude-agent-sdk-typescript v0.3.274 (Sep 17)

Adds startup_failure_reason on stream-json startup failures, mcpServer: {name, source} on canUseTool options and tool hook inputs, new CLAUDE_CODE_MCP_STARTUP_WAIT_MS and CLAUDE_CODE_EMIT_STARTUP_TIMING env vars, and fixes getSessionMessages() omitting messages sent while Claude was running a tool.

claude-agent-sdk-python v0.2.154 (Sep 17)

Bumps the bundled Claude CLI to v2.1.274; no SDK-level feature changes.

Claude Code weekly usage limits update (effective Sep 14)

Permanently raises standard Claude Code weekly limits 25% over pre-promotion levels for Pro/Max/Team/seat-based Enterprise, and removes the separate weekly Opus-specific cap so the whole allowance can go to any model. Net effect versus the expiring temporary 50% boost (which ran since May) is a 17% cut, which Anthropic acknowledged in a follow-up post after developer backlash.

Claude Cowork merges into chat; Docs, Slides, Design ship in beta (Sep 16)

Folds the separate Claude Cowork product back into the main chat interface so Claude decides task scope on its own, and launches Claude Docs, Claude Slides, and Claude Design in beta on every paid plan — drafted documents and decks can be edited inline, presented from Claude, or exported to PowerPoint/PDF. Rollout starts on Pro/Max web, desktop, and mobile; Enterprise gets 30 days' notice.

🔌 Claude Code Plugins

Plugin tracking skipped this run — official marketplace install-count cache unavailable.

🛠️ Skills

tt-a1i/archify

Ships 9 commits on Sep 16 (dependency updates, delta preservation, UTF-8 SVG fixes) after 4 commits Sep 15 and 3 Sep 14, including a new "Archify review skill" doc.

ayghri/i-have-adhd

Merges a README update (Sep 16) and cost-measurement/session-eval validation changes (Sep 15), following Spanish-README and MIT-license-link docs commits on Sep 14.

Unchanged in window: K-Dense-AI/scientific-agent-skills (only an automated security-scan report refresh Sep 14, no functional change since Sep 13), affaan-m/ECC (no default-branch commits since Sep 12), agentskillexchange/skills (only automated sync/regenerate bot commits).

🤖 Agents & Subagents

None of the top items updated in window.

Unchanged in window: nicobailon/pi-subagents (last activity Sep 15, already reported), VoltAgent/awesome-claude-code-subagents (last activity Sep 14, already reported), anthropics/commerce-agents (last commit Aug 31).

🔗 MCPs & Integrations

oraios/serena

Ships a Sep 17 language-server cache-directory fix and a Godot LS coordinate-offset fix, following a Sep 16 project remove CLI command and an atomic-save fix for edited source files.

ChromeDevTools/chrome-devtools-mcp

Adds sanitized client-name telemetry and multi-file-path support for upload_file (#2668), plus a doc update pointing the chrome-devtools SKILL at the get_css_styles tool — all Sep 17.

modelcontextprotocol/ext-skills

Publishes the finalized Skills-over-MCP extension docs (SEP-2640) via VitePress/Cloudflare Pages, ratifies three previously-proposed decisions to Accepted, and adds a SECURITY.md — all merged Sep 16.

Unchanged in window: DeusData/codebase-memory-mcp (v0.11.0 packaging sync already reported, no new merges since Sep 16), github/github-mcp-server (reaction-removal tools already reported, no new merges since Sep 16), upstash/context7 (last activity Sep 14, already reported).

💡 Community — Workflows & Ideas

No relevant news today.

📰 Quick Mentions

• Piebald-AI/claude-code-system-prompts — tracks Claude Code's full system prompt across releases; the Sep 17 update for v2.1.274 adds roughly 6,150 tokens of new prompt content.
• anthropics/claude-plugins-official — adds Pendo's five plugins (analytics, guides, orchestrate, setup-agent-analytics, setup-mcp-agent-analytics) plus Clay, Intuit QuickBooks, and Zocks Advisor to the official marketplace (Sep 16).