Claude Report — 2026-08-19

🚀 Anthropic Official

Claude Code v2.1.235 (Aug 18)

• Adds an optional spellcheck setting that underlines misspelled words in the prompt input using your installed aspell, hunspell, or ispell.
• Fixes whole-prompt-cache invalidation when a language server disconnects or reconnects mid-session.
• Fixes Shift+Tab inside the permission prompt's comment field wrongly approving the edit and granting session-wide edit permission instead of closing the field.
• Fixes the Agent tool silently defaulting to a general-purpose subagent when unavailable — an omitted subagent_type now returns a clear error listing available agents.
• Improves permission dialogs so displayed text and "don't ask again" options always match what a grant would actually cover.
• Improves memory/CPU usage while cloud sessions like /ultrareview or /autofix-pr run in the background by no longer re-scanning their full event stream on every update.
• Hardens the embedded macOS/Linux grep: pathological patterns now fail fast instead of exhausting memory.
• Fixes VSCode focus jumping between open Claude tabs on window restore, plus several markdown-rendering, dialog-navigation, and Vim-mode state fixes.

Weekly Claude Code limit boost extended through August 31 (Aug 18)

Anthropic extends the 50% increase to weekly Claude Code usage limits through August 31, saying it hopes to make the boost permanent but that capacity may stay tight given demand.

How Claude is accelerating protein design and analytical chemistry (Aug 18)

Claude designed protein binders against 14 of 15 targets with 22.6–35.1% hit rates (vs. the field's typical 10-15%), including a 40% hit rate against RBX1 versus 3.7% among human competition participants; separately, Claude Opus 5 processed raw NMR and LC-MS data in under 25 minutes with results matching lab analysis within 0.08 units.

Claude Agent SDK for Python v0.2.140 (Aug 18)

Adds support for mcp 2.x alongside 1.x for in-process servers, a forward_subagent_text option to stream subagent text/thinking blocks, a structured ResultError exception, and can_use_tool callback support for string prompts; fixes get_subagent_messages() losing parent_tool_use_id/parent_agent_id, and bumps the bundled CLI to v2.1.235.

Claude Agent SDK for TypeScript v0.3.235 (Aug 18)

Bumps to parity with Claude Code v2.1.235; no independent API changes this release.

anthropics/skills — academy-guide rename (Aug 18)

Renames the "claude-academy-guide" skill added last week to "academy-guide" and shortens its description (#1605).

🔌 Claude Code Plugins

Plugin install-rank cache unavailable this cycle — top-10 install-rank tracking skipped per this run's instructions.

🛠️ Skills

agentskillexchange/skills

Adds a "SandBase" multi-source research skill and an "Atlas Cloud" image-generation skill (Aug 19), on top of continuous automated catalog syncs.

Piebald-AI/claude-code-system-prompts

Publishes the v2.1.235 system-prompt diff (+6,990 tokens, Aug 19), tracking Claude Code's latest release.

anthropics/skills

Renames academy-guide skill (Aug 18) — see Anthropic Official above.

Unchanged in window: tt-a1i/archify (still v2.15.0, Aug 17, already covered), alirezarezvani/claude-skills (no confirmed recent push).

🤖 Agents & Subagents

nicobailon/pi-subagents v0.51.0 (Aug 18)

Makes workflow orchestration safer across long-running sessions with stable-key workflow steering, external job providers, and better recovery from storage issues; removes deprecated chain controls and prompts.render from workflow scripts.

anthropics/claude-agent-sdk-python (Aug 18)

Ships v0.2.140 — see Anthropic Official above for details.

anthropics/claude-agent-sdk-typescript (Aug 18)

Ships v0.3.235 — see Anthropic Official above.

Unchanged in window: VoltAgent/awesome-claude-code-subagents (last commit Aug 12), AMAP-ML/LongHorizon-Harness (still v0.1.6, Aug 17, already covered).

🔗 MCPs & Integrations

modelcontextprotocol/typescript-sdk

Fixes auth token-refresh errors being silently swallowed after a saveTokens failure (#2053, Aug 18), on top of Aug 16-17 fixes for the initialize handshake's missing notifications/cancelled, protocol-version header rejection, and request-ID-0 cancellation handling.

modelcontextprotocol/python-sdk

Publishes versioning, roadmap, and dependency policies for MCP SDK v2, pins text I/O to UTF-8 to fail CI on locale-dependent reads/writes, and drops later-revision cache-hint fields on pre-2026 sessions (Aug 16).

DeusData/codebase-memory-mcp

Ships v0.10.8 (Aug 19) after a botched v0.10.7 (Aug 18, yanked from npm/PyPI over a tagging error), fixing Cypher aggregates that undercounted results, resolving Python aliased imports to their real definitions, fixing non-ASCII search degradation on Windows, and adding FreeBSD support.

shlokkhemani/rabbithole

Ships a burst of UI and CI work on its MCP server for branching, canvas-based document Q&A (Aug 18-19): docked note cards, a redesigned settings pane, tool-call progress keepalives, and a CI pipeline that deploys on a cached test verdict instead of re-running the suite.

Unchanged in window: github/github-mcp-server (still v1.9.0, Aug 10), awslabs/mcp (last release Aug 14), oraios/serena (its Clojure didChangeWatchedFiles fix merged Aug 18 but was already reported yesterday, no new functional change).

💡 Community — Workflows & Ideas

Show HN: Csift — the missing tool to sift your Claude Code sessions (Aug 19)

A Rust CLI (built by Claude Code itself) that regex-searches, recovers deleted files/images from, and audits Claude Code .jsonl transcripts offline — no embeddings, database, or network access — handling multi-gigabyte session corpora in about a second via memory-mapping and SIMD scanning.

Show HN: Roost — top for your Claude Code sessions (Aug 18)

A one-file, dependency-free terminal dashboard that shows live Claude Code sessions' token/context usage and, uniquely, the subagents each session has spawned with their own context windows.

When deny doesn't win: least-privilege permissions for Claude Code (Aug 17)

Introduces permcheck, a deterministic engine that lets a narrow allow rule carve a safe exception through a broad deny rule only when it's a provable strict subset of what's denied, replacing allow-lists that had grown past 900 rules and still prompted on safe commands.

Show HN: Clinch — local-first Warp fork built for agent session management (Aug 18)

A Warp-based terminal purpose-built for agentic engineering, with one-click transfer between Claude Code and Codex sessions, automatic session resume, and iPhone remote control of agents running on your Mac.

📰 Quick Mentions

• anthropics/claude-plugins-official — continues routine automated version bumps (carta, datadog, exa, firecrawl, and more) alongside a manual "enroll azure in releases-only" tracking-policy commit by bryan-anthropic (Aug 19).
• Personetta — one YAML persona spec shared across Cursor, Copilot, Claude, and Cline (Aug 19).
• awesome-mcp-servers — merges the "add-catchall-mcp" entry, PR #10100 (Aug 17).