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№ 0562026-06-07

Claude Report — 2026-06-07

🚀 Anthropic Official

Making Claude a Chemist

Published June 5, 2026. Anthropic's first chemistry specialization white paper tests Claude Opus 4.7, Opus 4.6, and Sonnet 4.6 against ChemDraw and MestReNova on 20 NMR spectra drawn from post-training-cutoff preprints; Opus 4.7 matches the dedicated tools on forward prediction (structure → spectrum) and uniquely enables inverse prediction (spectrum → molecular structure) — a task that previously required dedicated software and additional 2D experiments.

Claude Code v2.1.161–163 — Version Gate Settings, Plugin List, Hook additionalContext

Released June 4, 2026 across three builds (21:52 UTC for the top tag). Adds requiredMinimumVersion and requiredMaximumVersion to managed settings for fleet-wide version enforcement; /plugin list --enabled/--disabled to inspect active plugin state; claude agents --json now includes a waitingFor field for programmatic automation; Stop/SubagentStop hooks can return hookSpecificOutput.additionalContext to inject non-error feedback that continues the turn rather than aborting it; \$ escapes a literal $ before digit sequences in skill command bodies. Supporting changes: OTEL resource attributes added to metrics labels, WebFetch permission rule handling corrected, Windows path matching fixed in permission rules, agent row display and parallel tool handling improved.

🔌 Claude Code Plugins

Plugin cache unavailable — top-10 tracking skipped this run.

🛠️ Skills

glebis/claude-skills — rigorous-experiments skill added

Adds rigorous-experiments skill (commits Jun 5–6): supports statistical experimentation in three modes — design, validation, and audit — with an explorer UI that surfaces experiment titles and flags unexplained tests; a tufte-report improvement on Jun 5 ships explicit row-hover CSS for cleaner table readability.

Unchanged in window: anthropics/skills, anthropics/knowledge-work-plugins, Piebald-AI/claude-code-system-prompts, ComposioHQ/awesome-claude-skills, VILA-Lab/Dive-into-Claude-Code

🤖 Agents & Subagents

claude-agent-sdk-typescript v0.3.163 — stop_task Idempotency + Builtin MCP Server Fix

Released June 4, 2026 at 21:52 UTC. stop_task control requests now return success when the target task is already gone (not_found or not_running), enabling reliable stale-chip pruning without extra error handling; fixes SDK hosts being unable to inject builtin MCP servers (e.g. claude-in-chrome) via setMcpServers when the CLI launched without them pre-configured; Stop/SubagentStop hook events gain additionalContext in hookSpecificOutput in sync with the CLI change.

Unchanged in window: nicobailon/pi-subagents, Chachamaru127/claude-code-harness

🔗 MCPs & Integrations

awslabs/mcp 2026.06 — Compute Optimizer Region Fix + SQLite Timeout Increase

Released June 4, 2026 at 21:51 UTC. Fixes Compute Optimizer hardcoded us-east-1 region — the region parameter is now honored for all calls; clarifies end_date semantics in the cost-anomaly tool; raises SQLite busy_timeout from the default to 30 s to reduce lock contention under concurrent agent access; upgrades bundled AWS CLI to 1.45.22.

Unchanged in window: modelcontextprotocol/servers, github/github-mcp-server, modelcontextprotocol/typescript-sdk, portainer/portainer-mcp

💡 Community — Workflows & Ideas

No relevant news today.

📰 Quick Mentions

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