Claude Report — 2026-09-16

🚀 Anthropic Official

Claude Code v2.1.273 (Sep 15)

Adds LLM gateway request headers (x-claude-code-request-class, x-claude-code-agent-type, opt-in via CLAUDE_CODE_GATEWAY_HINT_HEADERS=1), MCP server disconnection notifications with reconnect tracking, and the ability to fork a --remote-control session into a local background session. Also fixes the bash permission checker mishandling dangerous commands like rm in bypass mode, org Skills staying available after being turned off, MDM/managed-settings being ignored, 401/403 credential-prompt clarity on Bedrock/Vertex/Foundry, prompt-cache rewriting on /login//upgrade//extra-usage, and the context meter double-counting advisor-tool turns.

claude-agent-sdk-typescript v0.3.273 (Sep 15)

Adds a usage_report sibling on assistant messages (surfaces headless /usage results), a reason: "worker_restart" value on task notifications, a hook-timeout fix, and an SSE transport fix for slash-command list updates.

claude-agent-sdk-python v0.2.153 (Sep 15)

First release since the Sep 2 freeze. Adds a snapshot option for system prompts (SystemPromptPreset/new SystemPromptCustom) to keep the system prompt fixed across resumed sessions for better prompt-cache reuse, requiring CLI 2.1.257+; bundled Claude CLI bumped to v2.1.273.

anthropic-sdk-typescript v0.126.0 (Sep 15)

Adds a beta compaction parameter with signed compaction blocks, auto-mode tool permissions for Managed Agents, url_sources on the web fetch tool, workspace data-residency geo enums, and a thinking_mismatch_allowed beta input transform. Companion patch releases shipped same day for the Vertex, Bedrock, Foundry, AWS, and Google Cloud SDK variants.

anthropic-sdk-python v1.6.0 (Sep 15)

Mirrors the TypeScript SDK: beta compaction parameter, auto-mode tool permissions, workspace data-residency enums, async credential token provider support, and a Retry-After handling fix.

Messages API: on-demand conversation compaction (beta) (Sep 14)

New compact-2026-09-04 beta header. A top-level compaction parameter returns a signed block summarizing prior messages that can replace those messages on later requests; supports background compaction, verbatim-preserved recent turns, and valid extended-thinking blocks on models with preserved thinking.

Salesforce in Claude (beta) (Sep 15)

Launches a plugin integrating sellers' Salesforce data directly into Claude, with 37 skills automating account research, call prep, pipeline review, and CRM updates.

Scaling CI 25x for agentic coding (Sep 14)

Anthropic's engineering blog details how agentic coding (Claude authoring 80% of new code, 8x more code shipped per quarter) drove a 25x CI-job increase in six months, forcing a redesign of test-impact analysis from a single-process listener to stateless workers appending to a database/in-memory-backed journal.

🔌 Claude Code Plugins

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

The claude-plugins-official repo has no per-plugin folders — it's a single manifest (.claude-plugin/marketplace.json) with git-subdir pointers, so version bumps aren't independently diffable from this repo alone. Window activity: 144 commits total; the only non-routine changes were one net-new plugin, Informatica (Sep 16), one new BlackRock Advisor Center entry (Sep 13), and a same-day publish-then-revert of "Claude for Small Business" (Sep 15). Everything else was automated version-pointer bumps across roughly 85 plugins including stripe, wix, vercel, dynatrace, langfuse, and others — no visible functional diffs at this repo level.

🛠️ Skills

tt-a1i/archify

Ships 12 commits Sep 13–16, including a Sep 16 fix for semantic ID handling in the viewer (#424) and a new "Archify review skill" doc (#435).

K-Dense-AI/scientific-agent-skills

Adds an AlphaGenome skill plus supporting images (Sep 13), followed by an automated security-scan report update (Sep 14); no activity Sep 15–16.

ayghri/i-have-adhd

Merges eval-cost validation, a Spanish README, and session-eval changes through Sep 15.

Unchanged in window: affaan-m/ECC (no default-branch commits since Sep 12), agentskillexchange/skills (only automated sync/regenerate bot commits, no functional change).

🤖 Agents & Subagents

nicobailon/pi-subagents

Tags v0.68.0 (Sep 15), followed by 7 more same-day fix/test commits covering worktree dependency handling, npm detection, and a Ghostty inspector fix.

VoltAgent/awesome-claude-code-subagents

Merges a memory-curator subagent plus new auth and webhook-engineer agents, with a WordPress-reference cleanup (Sep 14).

Unchanged in window: anthropics/commerce-agents (last commit Aug 31, no in-window activity). See Anthropic Official above for claude-agent-sdk-typescript (now v0.3.273) and claude-agent-sdk-python (now v0.2.153, first move in 13 days).

🔗 MCPs & Integrations

oraios/serena

Ships an atomic-save fix for edited source files (#2041, Sep 16) and doc/cache-invalidation fixes plus a new project remove CLI command (Sep 15).

DeusData/codebase-memory-mcp

Continues its memory-optimization pass through Sep 13–16 with a v0.11.0 packaging sync and further sanitizer fixes, latest merge Sep 16.

ChromeDevTools/chrome-devtools-mcp

Bumps its devtools-frontend dependency (#2755, Sep 16) after Sep 14–15 fixes to config coercion and log-to-file gating.

github/github-mcp-server

Breaks its week-long freeze: merges update_issue_comment (#3284, Sep 15) then adds remove_issue_reaction, remove_issue_comment_reaction, and remove_pull_request_review_comment_reaction tools (#3285, Sep 16).

Unchanged in window: upstash/context7 (last activity Sep 14, already reported yesterday — no further evolution).

💡 Community — Workflows & Ideas

Product Traceability 2.0 (Sep 15)

Moves product-memory maintenance out of the main coding-agent loop via lifecycle hooks and a smaller auxiliary model that observes diffs and updates requirements; a small controlled test reports 54.6% fewer agent round trips and a 38.5% cost reduction.

malaysherasia-ai/claude-never-again (created Sep 13, active through Sep 16)

Converts fixed bugs into either bash pre-commit hooks (warn-mode, promotable to block) for scriptable cases, or one-line rules in a LESSONS.md Claude reads each session for non-scriptable ones — the same scripts fire from git's native hooks and Claude Code's internal hooks.

quemsah/awesome-claude-plugins (pushed Sep 16)

Runs an automated pipeline ranking the top 100 Claude Code plugin repos by adoption metrics across roughly 39,000 indexed repos.

skillsynchq/txcript (pushed Sep 15)

Moves AI chat sessions across coding-agent harnesses (Claude Code, Codex, OpenCode, Cursor).

pausan/agenttik (pushed Sep 16)

Wraps Claude Code and other CLIs in a local multi-project workspace (Go/SQLite/Vue3/Wails) for running parallel sessions with git-diff inspection and usage tracking.

📰 Quick Mentions

• Codacy skills, part 4 — local static-analysis skill scans and fixes code before an agent pushes commits (Sep 14).
• MeetVys/inkling — Show HN tool that returns HTML instead of Markdown when Claude Code fetches docs (Sep 15).
• cookiy-ai/sell-sessions-skill — open-source tool to package and sell recorded Claude Code/Codex sessions (Sep 16).