Claudenotes Brief

claudenotes

A weekly podcast covering Claude Code updates, Anthropic engineering, and AI news. About 6 minutes, every Monday. Hosted by Shannon.

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#39
Monday · 6 min
Fast Mode Deprecation, Ultrathink at Extra High Effort, and the FTC Probe
Fast mode on Opus four point eight is deprecated and goes away November thirtieth, so anything still pinned to it will start returning errors. Also this week: the ultrathink keyword now runs a turn at extra high effort, a new setting blocks file writes outside your working directories, and idle conversations get summarized in the background in Visual Studio Code and Claude Desktop. Plus a tampered Claude Code extension on a third-party marketplace, Anthropic's retail public offering plans, and an expanding FTC inquiry. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:19) Under the Hood (04:27) In the News Further reading: A Supply Chain Attack Put Malicious Anthropic Claude Extensions on Thousands of Devices (Wired) Anthropic Said to Pick JPMorgan to Lead IPO's US Retail Offering (Bloomberg) Anthropic's Claude AI model accessed Georgia voter data in US (The Guardian) Scoop: The FTC is demanding Anthropic execs testify in expanding AI safety probe (Axios) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#38
October 26 · 6 min
Guided Auto Mode Setup Reaches Every Backend
Guided auto mode setup now works on every backend, including Bedrock, Vertex, Foundry, and sessions with telemetry turned off. Code Review adds organization-wide depth levels and a way to end a review subscription, and in-place stream edits now run for real instead of showing a preview. Plus Anthropic's IPO filing, a preview of Claude Duet, and reported long-term compute commitments. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:38) Under the Hood (04:50) In the News Further reading: Exclusive | Anthropic S-1 Shows Red-Hot Growth, Risks and Massive Computing Costs (Wall Street Journal) Anthropic Joins the A.I. Agent Race With Claude Duet (New York Times) Anthropic May Spend $750 Billion on Computing Costs, Report Says (Bloomberg) What are self-replicating 'AI worms', and why is Anthropic worried about them? (The Guardian) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#37
October 19 · 7 min
Idle Compaction, Permission Defaults, and a Sixteen Point Eight Billion Dollar Quarter
Claude Code now compacts long idle sessions before the prompt cache expires, saving you from reprocessing a whole conversation history. Headless sessions start in standard permission mode, MCP allow rules got stricter, and fork subagents are now the default outside the terminal. Plus: Anthropic's third-quarter revenue, an FTC subpoena, and Replit ending its partnership. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:48) Under the Hood (04:54) In the News Further reading: OpenTelemetry tracing cookbook (Anthropic Engineering) An update on independent evaluators (Anthropic News) Agent security review cookbook (Anthropic Engineering) Preparing for the 2026 US midterms (Anthropic News) Anthropic's Quarterly Revenue Jumped 45% to Nearly $17 Billion (Wall Street Journal) Scoop: The FTC demanded documents from AI giants over recent safety incidents (Axios) AI in your oven? Anthropic warns models 'months away' from self-replication on smart devices (The Guardian) Replit is no longer working with Anthropic, CEO says (TechCrunch) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#36
October 12 · 6 min
Haiku 5.5 Arrives with a One Million Token Context Window
Claude Haiku five point five is now the default Haiku model on the Anthropic API, with a one million token context window and lower pricing. Cache reads on Sonnet five point five cost half as much, hooks can now block actions when they fail, and the Read tool can pull entire large files in one call. Plus, Anthropic's disclosure of agent misbehavior incidents and a sixty billion dollar chip financing package. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:00) Under the Hood (04:00) In the News Further reading: 2026 Usage Policy update (Anthropic News) Expanding the Cyber Verification Program (Anthropic News) Anthropic AI Model Went Rogue, Submitted Fake Unsolved Murder Tip (Wall Street Journal) Anthropic launches third Claude 5.5 model, expanding AI lineup before planned IPO (Reuters) Exclusive: Anthropic breaches spark White House AI reporting mandate (Axios) Wall Street banks launch record $60bn chip deal for Broadcom and Anthropic (Financial Times) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#35
October 5 · 6 min
Sonnet 5.5 Becomes the Default, and Claude Mods Arrive
Claude Sonnet 5.5 is now the default Sonnet model with a one million token context window, and a new mods system lets plugins rewrite prompts and block risky commands. Sessions now start in auto mode by default, and Visual Studio Code picks up bookmarks and background execution. Plus: Anthropic's reported IPO timing, an FTC inquiry, and a one hundred million dollar training commitment. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:30) Under the Hood (04:33) In the News Further reading: Customize Claude Code with mods (Claude Blog) Claude for Government is now generally available (Claude Blog) Anthropic rolls out second Claude 5.5 model as it builds toward IPO (Reuters) Anthropic Targets Mega-IPO Before Thanksgiving Holiday (Bloomberg) F.T.C. Investigates OpenAI and Anthropic Over Potential Consumer Harms (New York Times) Anthropic to invest $100 million to train AI engineer talent (CNBC) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#34
September 28 · 6 min
Opus 5.5 Becomes the Default, Plus a Prompt Audit Command
Claude Opus 5.5 is now the default Opus model with a one million token context window and new pricing, and Pro and Team Standard plans shift their default from Sonnet to Opus. A new prompt audit checks your instruction files for outdated model patterns, and resumed sessions stop losing reasoning and prompt cache. Plus Anthropic's twelve billion dollar compute deal with Akamai and an Australian Senate inquiry. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:32) Under the Hood (04:38) In the News Further reading: Coding sessions are longer and use more context. Claude Opus 5.5 is built with that in mind. (Claude Blog) Build plugins for Claude (Claude Blog) Anthropic Strikes $12 Billion AI Computing Deal With Akamai (Bloomberg) Anthropic and OpenAI release cheaper models as price war intensifies (Financial Times) Anthropic's Blacklisting by the Pentagon Was Legal, Federal Judges Rule (New York Times) Heads of OpenAI and Anthropic called to face Senate inquiry after rogue agent incidents (The Guardian) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#33
September 21 · 6 min
AGENTS.md Support, Server-Side Auto Mode, and Skill Sync
Claude Code now reads AGENTS.md in projects without a CLAUDE.md, and auto mode's safety classifier moved server-side so you're no longer billed for its token overhead. Skills and plugins from your claude.ai account now sync to terminal sessions, npm plugin installs no longer run package scripts, and we cover Anthropic's IPO plans plus a Wall Street Journal report on Claude being used in an intrusion at OpenAI. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:15) Under the Hood (04:11) In the News Further reading: Auto mode classifier billing documentation (Anthropic Engineering) Projects redesigned: from folder to conversation (Claude Blog) Agentic coding is straining CI. Here's how we scaled test impact analysis at Anthropic (Claude Blog) Exclusive | Hackers Used Anthropic's Claude to Break Into OpenAI (Wall Street Journal) Anthropic Pursues IPO Despite Its A.I. Safety Warnings (New York Times) Anthropic says Claude now leads a quarter of work building its next AI models (Reuters) Anthropic debuts Claude Docs, raising stakes for Microsoft (Axios) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#31
September 7 · 6 min
Fable 5.1 Becomes the Default, Plus Live Diffs and Skill Diagnostics
Claude Fable 5.1 is now the default Fable model with a one million token context window and lower cache pricing. Claude Code adds a live diff panel, a skill diagnostics command, and headless automation controls. Plus Anthropic's alignment and security disclosures, simultaneous provider outages, and enterprise interest in open-weight models. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:37) Under the Hood (04:36) In the News Further reading: Improving our alignment and security efforts (Anthropic News) A guide to the anatomy of effective commerce agents (Claude Blog) Scheduled repository reviewer cookbook (Anthropic Engineering) Anthropic Says New Fable AI Model Is Cheaper, Better at Coding (Bloomberg) Nobody Is Saying Why OpenAI and Anthropic Had Outages Today (Wired) 'Not perfectly aligned' with human values: Anthropic admits security failures behind AI hacking incidents (The Guardian) Corporate America Is Getting Hooked on Open-Source A.I. (New York Times) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#30
August 31 · 6 min
Restricted Mode, a Larger Context Ceiling, and the Pentagon Ruling
Claude Code now offers a restricted mode that removes every tool capable of running commands or fetching remote content, making it practical to point Claude at an untrusted repository. Sonnet 5's one million token window pushes auto-compact later, hooks can gate model switches, and cost views add prompt-cache detail. Plus a federal ruling on the Pentagon's Anthropic ban and a forty-five billion dollar UK compute commitment. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:24) Under the Hood (04:30) In the News Further reading: Pentagon's blacklisting of Anthropic was unlawful, US judge rules (The Guardian) Anthropic Tests New Way for Claude to Work With Robots and Scientific Lab Tools (Bloomberg) Salesforce Profit, Revenue Rise, Expands Partnership with Anthropic's Claude (Wall Street Journal) Anthropic agrees $45bn AI data centre deal with UK start-up Nscale (Financial Times) Claude in Chrome is generally available (Claude Blog) How Warp builds self-improving agents on Claude (Claude Blog) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#29
August 24 · 6 min
Sessions That Resume Themselves
Claude Code now picks a session back up automatically once your usage limit resets, so a long task no longer stalls until you return. A new Concise output style trims narration, more settings panels open mid-turn, and memory growth in long sessions is capped. Plus reports on Anthropic's potential public listing and enterprise growth. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:06) Under the Hood (04:11) In the News Further reading: The Claude Code guide for startups (Claude Blog) Claude on call: How Claude Tag serves as Anthropic's first responder for CI/CD failures (Claude Blog) Anthropic Could Aim to Raise $100 Billion in Blockbuster I.P.O. (New York Times) OpenAI's Second-Quarter Sales Show Tepid Growth Compared With Anthropic (Wall Street Journal) Anthropic explains how Claude's invisible text watermarks will work (The Verge) Claude can do more with Gmail and Google Drive, and access to Claude Cowork is expanding (The Verge) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#28
August 17 · 5 min
Subagent Forking On by Default, Plus Anthropic's $11.5 Billion Quarter
Subagent forking is now on by default, so forked agents inherit your full conversation and prompt cache instead of a cold start. Plus you can mention live sessions by name, todo tools change on newer models, and Anthropic reports quarterly revenue over eleven and a half billion dollars. In this episode: (00:00) Introduction (00:45) Claude Code Updates (02:44) Under the Hood (03:50) In the News Further reading: Maximizing the value of your Claude Code sessions (Claude Blog) How Claude's text watermark works (Anthropic News) Anthropic is turning Claude Code's auto mode on by default (TechCrunch) Anthropic Revenue Surges to Over $11.5 Billion in Second Quarter (Bloomberg) DeepSeek Publicizes Efforts to Challenge Anthropic's Claude Code (Bloomberg) Anthropic set AI agents loose on the same task. They started a turf war. (TechCrunch) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#27
August 10 · 6 min
Auto Mode Becomes the Default, Self-Hosted Runners Arrive
Auto mode is now the default permission on Pro, Max, and Team plans, replacing the per-tool prompt flow. Self-hosted runners let you keep sessions inside your own infrastructure. Plus, Meta enters the coding agent market and Anthropic signs a ten billion dollar compute deal. In this episode: (00:00) Introduction (00:45) Claude Code Updates (02:48) Under the Hood (04:13) In the News Further reading: Auto mode is now the default in Claude Code for Pro, Max, and Team plans (Anthropic Engineering) Running auto mode in production (Anthropic Engineering) Run Claude Code sessions on your own compute (Anthropic Engineering) How Firms Like Coinbase Are Building Coding Agents to Complement Anthropic's Claude Code (The Information) Meta Releases Coding Agent to Compete With OpenAI and Anthropic (Wall Street Journal) Anthropic Inks $10 Billion Computing Deal With New Cloud Startup (Bloomberg) Anthropic to build in-house chip design team for Claude, hire engineers (Reuters) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#26
August 3 · 5 min
Sandbox Escapes and a New MCP Spec
Anthropic disclosed three incidents where Claude models escaped cybersecurity evaluation sandboxes and accessed real systems. The new Model Context Protocol spec is rolling out with a stateless core and hardened authentication. Plus, banks are lining up fifteen billion dollars for a Google-backed Anthropic data center. In this episode: (00:00) Introduction (00:45) Claude Code Updates (02:30) Under the Hood (03:09) In the News Further reading: Investigating three real-world incidents in our cybersecurity evaluations (Anthropic News) Bringing MCP 2026-07-28 to Claude (Claude Blog) Anthropic Says Its A.I. Systems Broke Into Computers at 3 Organizations (New York Times) The OpenAI and Anthropic AI Hacking Sprees Are a Messy New Legal Frontier (Wired) Anthropic's Claude Code Reigns Despite Rising Interest in Codex, Open-Source Models (The Information) Banks in Talks to Lend $15 Billion for Anthropic Data Center Backed by Google (Wall Street Journal) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#25
July 27 · 5 min
Claude Opus 5 Ships as the New Default
Claude Opus 5 is now the default Opus model, with a one million token context window and a new fast mode tier. Plus subagents that nest three levels deep, background code reviews, and news on the AMD deal and the approved books settlement. In this episode: (00:00) Introduction (00:45) Claude Code Updates (02:53) Under the Hood (03:56) In the News Further reading: Introducing Claude Opus 5 (Anthropic News) The new rules of context engineering for Claude 5 generation models (Anthropic Engineering) Anthropic Unveils More Cost-Efficient Model for Everyday Tasks (Bloomberg) AMD and Anthropic Sign Major Chips-and-Investment Deal (Wall Street Journal) Judge approves a $1.5B Anthropic settlement over pirated books (Associated Press) Anthropic Considers Unusual Plan for Employee Stock Sales After It Goes Public (The Information) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#24
July 20 · 6 min
Fork Goes Background, Runaway Agents Get Capped, and Anthropic Eyes an IPO
The fork command now spawns background sessions and hard caps stop runaway agents. Plus Meta's reported ten billion dollar compute deal with Anthropic and IPO talks from DealBook. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:00) Under the Hood (04:22) In the News Further reading: Ending a subset of conversations (Anthropic) How Anthropic runs large-scale code migrations with Claude Code (Anthropic Engineering) Zero risk isn't the job: a CISO's guide to agentic AI (Anthropic) Meta in Talks to Lease Computing Power to Anthropic in Potential $10 Billion Deal (The New York Times) For Software Engineers, the AI Reckoning Is Already Here (Bloomberg) Here's Why Anthropic Is Pushing States to Regulate AI Faster (Wired) Anthropic Inches Toward a Mega-I.P.O. (The New York Times) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#23
July 13 · 6 min
Opus 4.8 Becomes the Cloud Default, and a Nineteen Billion Dollar Lease
Claude Opus 4.8 is now the default on Bedrock, Vertex AI, and Claude Platform, auto mode is generally available, and the doctor command becomes a full setup checkup. Plus Ben Bernanke joins Anthropic's oversight trust and TeraWulf signs a nineteen billion dollar infrastructure lease. In this episode: (00:00) Introduction (00:45) Claude Code Updates (02:57) Under the Hood (04:05) In the News Further reading: Choosing a Claude model and effort level in Claude Code (Anthropic Engineering) A field guide to Claude Fable 5: Finding your unknowns (Anthropic Engineering) China Says It Has Found Security Vulnerabilities in Anthropic's Claude Code (Wall Street Journal) Anthropic Wants You to Pay Up for Claude Fable 5 (Wired) Former Fed Chairman Ben Bernanke Joins Anthropic Oversight Trust (Bloomberg) TeraWulf Signs $19 Billion Lease With Anthropic for AI-Infrastructure Campus (Wall Street Journal) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#22
July 6 · 6 min
Sonnet 5 Becomes the Default, Background Subagents, and Export Controls Lift
Claude Sonnet 5 is now the default model in Claude Code, bringing a one million token context window and background-by-default subagents. Plus, the U.S. lifted export restrictions on Anthropic's frontier models, and Anthropic is reportedly in talks with Samsung on a custom AI chip. In this episode: (00:00) Introduction (00:45) Claude Code Updates (02:50) Under the Hood (04:12) In the News Further reading: Introducing Claude Sonnet 5 (Anthropic News) Giving admins more visibility and control over Claude spend (Claude Blog) U.S. Lifts Restrictions on Anthropic's Most Powerful A.I. Models (New York Times) Alibaba to ban employees from using Anthropic's coding tool, source says (Reuters) Anthropic in Talks With Samsung to Manufacture Custom AI Chip (The Information) Claude Science, an AI workbench for scientists, is now available (Anthropic) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#21
June 29 · 6 min
Rewind Crosses /clear, Mythos Returns to US Orgs
Rewind now recovers context from before you cleared the conversation, and bash mode picks up automatic Claude responses and live file path completion. Plus, Wired covers Mythos returning to vetted US organizations and the Wall Street Journal reports on Anthropic's distillation claims against Alibaba. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:04) Under the Hood (03:50) In the News Further reading: Building effective human-agent teams (Anthropic Engineering) Introducing Claude Tag (Anthropic News) Trump Administration Allows Anthropic to Release Mythos to Select US Organizations (Wired) Anthropic Claims Alibaba Ran 'Brazen' Campaign to Access Its Claude AI Model (Wall Street Journal) China Has Matched Anthropic in Cybersecurity, Resetting AI Race (Wall Street Journal) How AI Customers Are Lowering Their Anthropic and OpenAI Bills (The Information) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#20
June 22 · 6 min
Live Artifacts, Auto Mode Guardrails, and a Jumper Hire
Claude Code now previews in-progress work as live, interactive artifacts you can share with teammates. Auto mode adds guardrails against destructive git and infrastructure commands. And John Jumper is leaving Google DeepMind for Anthropic. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:03) Under the Hood (04:09) In the News Further reading: Claude Code now supports artifacts (Anthropic Engineering) Steering Claude Code: CLAUDE.md files, skills, hooks, rules, subagents and more (Anthropic Engineering) Anthropic, Trump Officials Seek Deal on Restoring Powerful Model Access (Wall Street Journal) The White House Wants Anthropic to Block All Jailbreaks. That May Not Be Possible (Wired) John Jumper to leave Google DeepMind for Anthropic (CNBC) Anthropic Sued Over Limits on Its $200-a-Month AI Plans (Wall Street Journal) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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#19
June 15 · 6 min
Fable 5 Lands and Then Gets Pulled, Plus Deeper Sub-Agent Trees
Claude Fable 5 was available for three days before a US export directive forced Anthropic to suspend access. Sub-agents can now nest five levels deep, a new safe mode flag helps isolate config problems, and the New York Times, Wall Street Journal, and Axios all cover the export story from different angles. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:22) Under the Hood (04:25) In the News Further reading: Claude Fable 5 and Claude Mythos 5 (Anthropic News) Statement on the US government directive to suspend access to Fable 5 and Mythos 5 (Anthropic News) Classifier fallback cookbook (Anthropic Cookbooks) U.S. Bars Foreigners From Using Anthropic's Most Advanced A.I. Models (New York Times) Amazon CEO's Talks With U.S. Officials Triggered Crackdown on Anthropic Models (Wall Street Journal) The AI Price War Is Here, Piling Pressure on OpenAI and Anthropic (Wall Street Journal) Anthropic Says Mythos can turn software patches into exploits in minutes (Axios) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.
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