todai
Monday, 20 April
6 min read · 1,065 words

ACTION NEEDED

  • Built with Opus 4.7 hackathon kicks off Tuesday — if you haven't applied, applications closed Sunday but the build week starts April 22. $100K in API credits, Claude Code team involved, two prompts: "build for a problem only you'd know" or "build something that doesn't have a name yet." Watch the r/ClaudeAI thread for community builds to follow or fork. https://cerebralvalley.ai/e/built-with-4-7-hackathon

REDDIT SIGNAL

  • First-hand report — qwen3.6-35b-a3b with 8-bit quant and 64K context via OpenCode on MBP M5 Max 128GB: "as good as Claude" for long research tasks with many tool calls, fast responses, no codebase sent to external servers. If you're hitting Claude Code rate limits or want an offline fallback, this is the most credible local alternative report yet. 556 upvotes, 267 comments | r/LocalLLaMA | https://www.reddit.com/r/LocalLLaMA/comments/1spdvpo/

TODAY'S ITEMS

1. Claude memory lands on Max plan — Pro rollout next two weeks

  • Anthropic confirmed Max plan users now have access to Claude's memory capabilities (the persistent, cross-session memory that tracks your workflow patterns, collaborators, and preferences). Pro plan rollout begins now and completes over the next two weeks.
  • Source: Anthropic Help Centre
  • Why it matters: Go to Settings → Memory in Claude and prime it now — tell it your stack, your project names, your code style preferences. Every session from here on inherits that context automatically instead of you re-explaining it.
  • Verified

2. Simon Willison dissects the Opus 4.6→4.7 system prompt changes — and builds a git timeline tool

  • Willison ran Claude Code on Anthropic's publicly published system prompt history to produce a git-based repo where you can use git diff, git log, and git blame to trace how Claude's instructions have evolved since Claude 3 (July 2024). His analysis of the 4.7 diff reveals: Claude now asks fewer clarifying questions (acts first when tools can resolve ambiguity), PowerPoint added as a Cowork tool, child safety section greatly expanded, and Claude is now told not to try to keep users in conversation.
  • Source: simonwillison.net
  • Why it matters: Understanding what changed in the system prompt tells you why Claude 4.7 behaves differently from 4.6 in chat — and the git timeline repo is a practical research tool if you're building on top of Claude and need to track prompt-level changes across model updates. https://github.com/simonw/research/tree/main/extract-system-prompts#readme
  • Verified

YOUR STACK — UPDATES

  • Claude Code (Apr 17 release): npm package now ships a native binary instead of bundled JavaScript — same npm install -g @anthropic-ai/claude-code command, faster startup. Also: Bash sandboxing hardened (deny rules now match commands wrapped in sudo/env/watch/setsid; /private/etc, /private/var paths treated as dangerous removal targets on macOS). https://github.com/anthropics/claude-code/releases

NEW TOOL / PRODUCT SPOTLIGHT

  • anthropics/skills: frontend-design — Official Anthropic skill that instructs Claude to reject generic "AI slop" aesthetics and make bold design decisions. Works with React & Tailwind out of the box. Install via Claude Code: /plugin marketplace add anthropics/skills then invoke with /frontend-design before any UI task. Pairs well with Claude Design for the design-to-code flow covered in Saturday's edition.
  • https://github.com/anthropics/skills/tree/main/skills/frontend-design

PROMPT OF THE DAY

Review my CLAUDE.md file and audit it for quality. For each
section, tell me:

1. Is this instruction still relevant, or is it stale/outdated?
2. Is it specific enough to actually change Claude's behaviour,
   or is it vague noise?
3. Is there a gap — something you wish you knew about this
   project that isn't documented here?
4. Suggest one concrete edit per section.

Output a revised CLAUDE.md with your edits shown inline using
a diff format so I can review each change before accepting.

Run this at the start of any project where CLAUDE.md hasn't been touched in a week — stale instructions are worse than no instructions because they cause confident wrong behaviour. Source: Inspired by shanraisshan/claude-code-best-practice project patterns https://github.com/shanraisshan/claude-code-best-practice

LANDSCAPE NOTES

  • OpenAI Codex (Apr 16): major update adds computer use, image generation, memory, web workflows, SSH devboxes, and in-app browsing. The gap between Claude Code and Codex is closing fast on feature count — worth tracking if you evaluate tooling for teams. https://openai.com/index/codex-for-almost-everything/
  • Anthropic engineering: "Quantifying infrastructure noise in agentic coding evals" — infrastructure config alone can swing SWE-bench/Terminal-Bench scores by up to 6 percentage points, more than the gap between top models on most leaderboards. Worth reading before trusting any eval comparison. https://www.anthropic.com/engineering/infrastructure-noise
  • Claude Cowork (Apr 9): now GA on macOS and Windows with role-based access controls and SCIM provisioning for Enterprise — if you're on Enterprise, admin can now restrict Cowork by team and department without blocking it org-wide. https://support.claude.com/en/articles/12138966-release-notes

TOOL OF THE WEEK

  • Mozilla Thunderbolt — open-source, self-hostable AI client from the Thunderbird team. Model-agnostic: routes through Claude, GPT, Mistral, OpenRouter, or local models via Ollama/llama.cpp. Designed for enterprise on-prem deployment, currently in active development + security audit. Ships on web, macOS, Windows, Linux, iOS, Android.
  • Deploy locally: git clone https://github.com/thunderbird/thunderbolt && cd thunderbolt/deploy && docker compose up (see deploy/README.md)
  • Setup time: ~20 minutes. Currently needs your own model API keys — no inference endpoint yet.
  • Why this week: 696★ today (2,090★ total), trending fast, directly relevant if your team wants a self-hosted Claude/multi-model interface without sending data to a vendor.
  • https://github.com/thunderbird/thunderbolt

TRENDING THIS WEEK

  • Opus 4.7 regression workaround confirmed — disable adaptive thinking, set effort to high. Fastest path to stable performance while Anthropic patches.
  • Claude Design launched Sat Apr 17 — design-to-Claude Code handoff pipeline, available on Pro/Max/Team/Enterprise at claude.ai/design.
  • Claude Code Ultraplan entered preview (Week 15, Apr 6-10) — draft plans in cloud, review in browser, execute remotely or pull back to CLI.
  • qwen3.6-35b via OpenCode on M-series Mac gaining momentum as local Claude Code alternative — 556 upvotes r/LocalLLaMA, multiple first-hand confirmations.
  • Claude Code native binary shipped Apr 17 — JavaScript layer removed from npm package, faster startup.