The Hallway Track

claude-code

39 tracked signals on claude-code.

Breaking Claude Code Opus 5 Auto Mode

Simon Willison · Aug 27, 2026

Prompt injection attack bypasses Claude Code Auto Mode with 80% success rate

“The safety mechanism itself can become part of the failure. The classifier allowed the creation of the malware process, but then it blocked the command intended to stop it!”
Boris Cherny: Stop Hobbling Your AI

Y Combinator · Jul 27, 2026

Opus 5 achieves prompt injection resistance and can run autonomously for days without scaffolding

“A year ago the model would have just done it. But nowadays Opus does not.”
Claude Code’s Next Era — Thariq Shihipar, Anthropic

Dario Amodei · Latent Space Blog · Sep 29, 2026

Anthropic's Claude Code evolves toward self-modifying agents via 'Cloud Brain, Local Hands' architecture.

“From the rapid rise of Claude Code to a future where agents can rewrite their own harnesses, collaborate across teams, and operate across cloud and local environments, the way we build software is changing extraordinarily fast.”
WWDC26: Speedrun your game port with agentic coding | Apple

Apple Developer (WWDC) · Jun 08, 2026

Apple's Game Porting Toolkit 4 adds agentic coding skills that let coding agents port games to Apple platforms far faster.

“We're at a moment where coding agents are fundamentally changing how software gets built. Game porting is no different.”
Uber Caps Usage of AI Tools Like Claude Code to Manage Costs

Simon Willison · Jun 03, 2026

Uber caps employees at $1,500/month per AI coding tool like Claude Code to control runaway costs.

“The rideshare giant is limiting all employees to $1,500 in monthly token spending per AI coding tool, an Uber spokesperson said in response to a Bloomberg News inquiry.”
I think Anthropic and OpenAI have found product-market fit

Simon Willison · May 27, 2026

Anthropic and OpenAI shifted enterprise pricing to API usage, signaling true product-market fit.

“I had assumed that companies making extensive use of agents were getting similar discounts. It turns out I could not have been more wrong about that.”
Some ideas for what comes next, May 2026

Nathan Lambert · Interconnects · May 26, 2026

Open models and even Google lack a true competitor to Claude Code and Codex for agentic work.

“even the mighty Google doesn't have a clear competitor for Claude Code and Codex”
Parallel Coding Agents with Lakebase | Claude Code + GitHub Actions

Databricks · Oct 01, 2026

Databricks demo pairs Git worktrees with Lakebase database branching to safely isolate parallel coding agents

“Each agent gets its own isolated branch of the database, so it can run migrations, test changes, and experiment without affecting anything else.”
Scale AI coding agents while controlling costs with ug – the Unity Gateway CLI

Databricks · Sep 24, 2026

Databricks' Unity Gateway CLI lets enterprises govern and cost-control AI coding agents like Claude Code and Codex.

“From 0 to 60% I use Claude Code and the models are available there. 60 to 80% of the time I use Codex and a specific system model. And if I'm hitting 80-100% of my budget, I want to use a cheaper model like Kimmy.”
Quoting voxium

Simon Willison · Sep 20, 2026

A new hire reports their big-company team is forced to ship Claude Code output nobody reads or understands.

“People are working 12 to 13 hours a day just to press enter. Nobody is reading anything.”
[AINews] not much happened today

Aravind Srinivas · Latent Space Blog · Sep 18, 2026

Anthropic, Google, and others are standardizing persistent, asynchronous agent runtimes as the default UX.

“one conversation, many cloud threads”
From Primitives to Production: How Anthropic Builds Agents

Databricks · Aug 19, 2026

Anthropic defines agents by leaning on model intelligence with minimal core primitives in a loop.

“Agents in anthropic are actually very simply defined where essentially you want to give the model and lean in on model intelligence as much as possible.”
Quoting Thariq Shihipar

Simon Willison · Sep 18, 2026

Claude Code now supports AGENTS.md, falling back to it when no CLAUDE.md exists.

“Starting today in version 2.1.277, if there is no CLAUDE.md in a folder, Claude will check for and use AGENTS.md.”
Video compressor

Simon Willison · Sep 07, 2026

A new video compressor tool was developed using FFMPEG and WebAssembly.

Benchmarking semantic code retrieval on Claude Code — Kuba Rogut, Turbopuffer

AI Engineer · Jun 03, 2026

Claude Code defaults to agentic grep search, but semantic code retrieval yields measurable accuracy and retention gains.

“they just kind of found agentic search which is actually you know, grepping through your file system kind of worked better and you know, seems to work simpler for cloud code”
AI Engineer Melbourne 2026 Keynote Livestream | Day 1

AI Engineer · Jun 03, 2026

AI-written code is rising from ~10% today toward 40-50% by year-end, and AI is increasingly the harness, not just the model

“this is my argument around why AI engineering will be the last job, why you guys all have job security and why you guys will take over the world”
Claude Code can destroy your database

No Priors · May 30, 2026

Existing security tools lack context to govern AI coding agents that may autonomously delete production databases.

“if cloud code is working on an unrelated task and suddenly thinks that maybe the right thing to do is to delete our database and recreate it, maybe we don't want that to happen”
Claude Code uses Bun written in Rust now

Simon Willison · Jul 19, 2026

Claude Code v2.1.181+ ships Bun's Rust rewrite in production across millions of devices

“Claude Code v2.1.181 (released June 17th) and later use the Rust port of Bun. Startup got 10% faster on Linux but otherwise, barely anyone noticed. Boring is good.”
Kākāpō Party

Simon Willison · Sep 26, 2026

Claude Opus 5.5 generates pixel art animations from photos via simple prompts

“I had seen some buzz around how good Claude Opus 5.5 was at creating pixel art animations.”
llm-anthropic 0.27

Simon Willison · Aug 24, 2026

Anthropic Python SDK v1.0 switches to httpx2, mirroring OpenAI's identical move two weeks prior.

“Upgrade to anthropic>=1 - read https://raw.githubusercontent.com/anthropics/anthropic-sdk-python/refs/heads/main/MIGRATION.md and get the tests passing”
Cloudflare CAPTCHA on at least one ampersand

Simon Willison · Jun 16, 2026

Cloudflare CAPTCHA rules can be scoped to only challenge search URLs containing an ampersand, fixed via Claude Code.

“After some mucking around with Claude Code it turns out you can register the following rule instead, so the CAPTCHA only kicks in for search URLs containing at least one ampersand”
Mapping SQLite result columns back to their source `table.column`

Simon Willison · Jun 13, 2026

Simon Willison used Claude Code (Opus 4.8) to find methods mapping SQLite result columns back to their source table.column.

“I decided to set Claude Code (Opus 4.8, since Fable is currently banned by the US government) on the problem.”