Simon Willison
Articles about AI Agents, software-development, coding-agents.173 articles · Last updated: 04/04/2026
Articles
A quote from Kyle Daigle
explanation · 04/04/2026 · github, platform-activity, software-development
Vulnerability Research Is Cooked
explanation · 03/04/2026 · vulnerability-research, ai-agents, exploit-development
The cognitive impact of coding agents
explanation · 03/04/2026 · coding-agents, ai-ethics, podcast-appearances
A quote from Daniel Stenberg
explanation · 03/04/2026 · ai-security, open-source, curl
Research: Can JavaScript Escape a CSP Meta Tag Inside an Iframe?
explanation · 03/04/2026 · javascript, content-security-policy, iframes
A quote from Willy Tarreau
explanation · 03/04/2026 · kernel-security, software-development, ai-impacts
A quote from Greg Kroah-Hartman
explanation · 03/04/2026 · ai-security, open-source, linux-kernel
The Axios supply chain attack used individually targeted social engineering
explanation · 03/04/2026 · supply-chain-attacks, social-engineering, malware
March 2026 sponsors-only newsletter
reference · 02/04/2026 · agentic-engineering, streaming-experts, supply-chain-attacks
Highlights from my conversation about agentic engineering on Lenny’s Podcast
explanation · 02/04/2026 · ai-engineering, automation, software-development
Release: llm-gemini 0.30
reference · 02/04/2026 · llm-development, gemini-release, monthly-briefing
Gemma 4: Byte for byte, the most capable open models
explanation · 02/04/2026 · llms, google-deepmind, ai-research
Release: datasette-extract 0.3a0
reference · 01/04/2026 · data-import, datasette, machine-learning
A quote from Soohoon Choi
explanation · 01/04/2026 · ai-development, software-engineering, economic-incentives
Release: datasette-llm-usage 0.2a0
reference · 01/04/2026 · datasette, llm-usage, logging
Release: datasette-llm 0.1a6
reference · 01/04/2026 · llm-integration, python-api, datasette
Release: datasette-llm 0.1a5
reference · 01/04/2026 · llm-integration, plugin-development, datasette
Release: datasette-enrichments-llm 0.2a0
reference · 01/04/2026 · datasette, llm, release-notes
Release: datasette-enrichments-llm 0.2a1
reference · 01/04/2026 · datasette, llm, enrichments
Supply Chain Attack on Axios Pulls Malicious Dependency from npm
explanation · 31/03/2026 · supply-chain-attacks, npm-security, axios
Release: llm 0.30
reference · 31/03/2026 · large-language-models, plugin-development, documentation
Release: datasette-llm 0.1a4
reference · 31/03/2026 · datasette, llm, release-notes
Release: llm-echo 0.4
reference · 31/03/2026 · llm-echo, sponsorship, monthly-briefing
Release: llm-all-models-async 0.1
reference · 31/03/2026 · llm-plugins, async-models, datasette
Release: llm-mrchatterbox 0.1
reference · 30/03/2026 · llm-release, sponsorship, email-digest
Mr. Chatterbox is a (weak) Victorian-era ethically trained model you can run on your own computer
how-to · 30/03/2026 · language-models, victorian-literature, ai-development
A quote from Georgi Gerganov
explanation · 30/03/2026 · local-models, ai-challenges, model-inference
Release: datasette-files 0.1a3
reference · 30/03/2026 · datasette, plugin-development, file-management
Release: datasette-llm 0.1a3
reference · 30/03/2026 · datasette, llm, release-notes
Pretext
explanation · 29/03/2026 · browser-library, text-rendering, performance-optimization
Tool: Python Vulnerability Lookup
how-to · 29/03/2026 · python, security, vulnerabilities
Tool: Pretext — Under the Hood
explanation · 29/03/2026 · llm-developments, tool-overview, sponsorship
A quote from Matt Webb
explanation · 28/03/2026 · ai-agents, coding-architecture, software-development
Vibe coding SwiftUI apps is a lot of fun
how-to · 27/03/2026 · swiftui, vibe-coding, macos-apps
A quote from Richard Fontana
explanation · 27/03/2026 · licensing, chardet, open-source
Release: datasette-showboat 0.1a2
reference · 27/03/2026 · datasette, software-release, llm-developments
We Rewrote JSONata with AI in a Day, Saved $500K/Year
explanation · 27/03/2026 · ai-development, jsonata, cost-savings
Quantization from the ground up
explanation · 26/03/2026 · quantization, large-language-models, model-accuracy
My minute-by-minute response to the LiteLLM malware attack
how-to · 26/03/2026 · malware, pypi, security
Thoughts on slowing the fuck down
explanation · 25/03/2026 · agentic-engineering, cognitive-debt, software-development
LiteLLM Hack: Were You One of the 47,000?
explanation · 25/03/2026 · security, supply-chain, python
Release: datasette-llm 0.1a1
reference · 25/03/2026 · llm-integration, datasette-plugins, data-enrichment
Release: datasette-files-s3 0.1a1
reference · 25/03/2026 · datasette, s3, file-storage
A quote from Christopher Mims
explanation · 24/03/2026 · ai, technology, critique
Streaming experts
explanation · 24/03/2026 · streaming-experts, mixture-of-experts, ai-optimization
Auto mode for Claude Code
explanation · 24/03/2026 · ai-agents, permissions, safeguards
Malicious litellm_init.pth in litellm 1.82.8 — credential stealer
explanation · 24/03/2026 · supply-chain-attacks, credential-theft, python-packages
Package Managers Need to Cool Down
explanation · 24/03/2026 · package-managers, dependency-management, supply-chain-security
Release: datasette-files 0.1a2
reference · 23/03/2026 · datasette, file-upload, plugins
Research: Starlette 1.0 skill
tutorial · 23/03/2026 · web-development, asgi-frameworks, starlette
A quote from David Abram
explanation · 23/03/2026 · software-development, llms, decision-making
A quote from Neurotica
explanation · 23/03/2026 · ai-ethics, generative-ai, slop
Beats now have notes
explanation · 23/03/2026 · blogging, content-creation, web-development
Tool: Merge State Visualizer
explanation · 22/03/2026 · version-control, crdts, interactive-ui
Experimenting with Starlette 1.0 with Claude skills
how-to · 22/03/2026 · python-frameworks, starlette, ai-agents
Research: JavaScript Sandboxing Research
explanation · 22/03/2026 · javascript, sandboxing, nodejs
Research: PCGamer Article Performance Audit
explanation · 22/03/2026 · web-performance, ad-tech, network-traffic
Tool: DNS Lookup
how-to · 22/03/2026 · dns, cloudflare, api
Using Git with coding agents - Agentic Engineering Patterns
how-to · 21/03/2026 · git, coding-agents, version-control
Profiling Hacker News users based on their comments
explanation · 21/03/2026 · ai-coding, user-profiling, security-concerns
Turbo Pascal 3.02A, deconstructed
explanation · 20/03/2026 · turbo-pascal, decompilation, software-history
A quote from Kimi.ai @Kimi_Moonshot
explanation · 20/03/2026 · ai-integration, machine-learning, partnerships
Thoughts on OpenAI acquiring Astral and uv/ruff/ty
explanation · 19/03/2026 · openai, astral, python
Autoresearching Apple’s “LLM in a Flash” to run Qwen 397B locally
how-to · 18/03/2026 · llm-inference, apple-research, qwen-model
Snowflake Cortex AI Escapes Sandbox and Executes Malware
explanation · 18/03/2026 · ai-security, malware-execution, prompt-injection
Subagents - Agentic Engineering Patterns
explanation · 17/03/2026 · ai-agents, subagents, coding-agents
GPT-5.4 mini and GPT-5.4 nano, which can describe 76,000 photos for $52
explanation · 17/03/2026 · gpt-5, openai, ai-models
A quote from Tim Schilling
explanation · 17/03/2026 · open-source, django, llm
A quote from Ken Jin
reference · 17/03/2026 · python, jit, performance
A quote from A member of Anthropic’s alignment-science team
explanation · 16/03/2026 · ai-ethics, alignment-science, generative-ai
Introducing Mistral Small 4
explanation · 16/03/2026 · ai-models, machine-learning, coding-languages
Use subagents and custom agents in Codex
how-to · 16/03/2026 · ai-agents, custom-agents, openai-codex
A quote from Guilherme Rambo
explanation · 16/03/2026 · macbook, security, hardware-indicators
How coding agents work - Agentic Engineering Patterns
explanation · 16/03/2026 · coding-agents, large-language-models, token-processing
Coding agents for data analysis
tutorial · 16/03/2026 · data-analysis, coding-agents, workshop
What is agentic engineering? - Agentic Engineering Patterns
explanation · 15/03/2026 · agentic-engineering, coding-agents, llms
My fireside chat about agentic engineering at the Pragmatic Summit
explanation · 14/03/2026 · ai-adoption, agentic-engineering, test-driven-development
A quote from Jannis Leidel
explanation · 14/03/2026 · ai-ethics, open-source, github
1M context is now generally available for Opus 4.6 and Sonnet 4.6
explanation · 13/03/2026 · opus-4-6, sonnet-4-6, openai
A quote from Craig Mod
explanation · 13/03/2026 · accounting-software, custom-development, productivity-tools
Shopify/liquid: Performance: 53% faster parse+render, 61% fewer allocations
explanation · 13/03/2026 · performance-optimization, coding-agents, liquid-template-engine
A quote from Les Orchard
explanation · 12/03/2026 · ai-coding, developer-divide, software-development
MALUS—Clean Room as a Service
explanation · 12/03/2026 · satire, open-source, ai-robots
Coding After Coders: The End of Computer Programming as We Know It
explanation · 12/03/2026 · ai-assisted-development, future-of-programming, software-engineering
A quote from John Carmack
reference · 11/03/2026 · software-engineering, john-carmack, yagni
Sorting algorithms
explanation · 11/03/2026 · sorting-algorithms, python, animation
AI should help us produce better code - Agentic Engineering Patterns
how-to · 10/03/2026 · ai-agents, technical-debt, software-development
Perhaps not Boring Technology after all
explanation · 09/03/2026 · llms, programming, technology-choices
Production query plans without production data
explanation · 09/03/2026 · postgresql, query-planning, database-statistics
A quote from Joseph Weizenbaum
reference · 08/03/2026 · computer-history, ai-ethics, internet-archive
Codex for Open Source
explanation · 07/03/2026 · open-source, ai-tools, chatgpt
Anthropic and the Pentagon
explanation · 06/03/2026 · ai-ethics, military-ai, ai-competition
Clinejection — Compromising Cline’s Production Releases just by Prompting an Issue Triager
explanation · 06/03/2026 · prompt-injection, github-security, ai-triage
Agentic manual testing - Agentic Engineering Patterns
how-to · 06/03/2026 · manual-testing, coding-agents, automated-tests
A quote from Ally Piechowski
how-to · 06/03/2026 · rails, code-audit, software-development
Introducing GPT‑5.4
explanation · 05/03/2026 · gpt-5-4, api-models, openai
Can coding agents relicense open source through a “clean room” implementation of code?
explanation · 05/03/2026 · open-source, clean-room-implementation, coding-agents
Something is afoot in the land of Qwen
explanation · 04/03/2026 · ai-models, team-resignation, alibaba
Anti-patterns: things to avoid - Agentic Engineering Patterns
how-to · 04/03/2026 · agentic-engineering, code-review, pull-requests
A quote from Donald Knuth
explanation · 03/03/2026 · generative-ai, automatic-deduction, creative-problem-solving
Gemini 3.1 Flash-Lite
explanation · 03/03/2026 · ai-models, cost-efficiency, product-update
February sponsors-only newsletter
explanation · 02/03/2026 · openclaw, agentic-engineering, strongdm
GIF optimization tool using WebAssembly and Gifsicle - Agentic Engineering Patterns
how-to · 02/03/2026 · gif-optimization, webassembly, gifsicle
A quote from claude.com/import-memory
how-to · 01/03/2026 · data-export, personalization, ai-assistants
Interactive explanations - Agentic Engineering Patterns - Simon Willison's Weblog
explanation · 28/02/2026 · cognitive-debt, interactive-explanations, ai-agents
Free Claude Max for (large project) open source maintainers
reference · 27/02/2026 · open-source, maintainers, claude-max
Please, please, please stop using passkeys for encrypting user data
explanation · 27/02/2026 · data-encryption, user-security, authentication
Unicode Explorer using binary search over fetch() HTTP range requests
how-to · 27/02/2026 · http-range-requests, unicode, binary-search
An AI agent coding skeptic tries AI agent coding, in excessive detail
explanation · 27/02/2026 · ai-agents, machine-learning, rust-programming
A quote from Andrej Karpathy
explanation · 26/02/2026 · ai-programming, coding-agents, ai-impact
Hoard things you know how to do - Agentic Engineering Patterns - Simon Willison's Weblog
how-to · 26/02/2026 · coding-agents, software-development, knowledge-management
A quote from Benedict Evans
explanation · 26/02/2026 · ai-engagement, openai-strategy, user-experience
Google API Keys Weren’t Secrets. But then Gemini Changed the Rules.
explanation · 26/02/2026 · api-keys, google-maps, gemini
Claude Code Remote Control
explanation · 25/02/2026 · remote-control, claude-code, software-updates
I vibe coded my dream macOS presentation app
how-to · 25/02/2026 · macos-development, presentation-tools, swiftui
Linear walkthroughs - Agentic Engineering Patterns - Simon Willison's Weblog
how-to · 25/02/2026 · coding-agents, showboat, swiftui
tldraw issue: Move tests to closed source repo
explanation · 25/02/2026 · open-source, intellectual-property, software-development
A quote from Kellan Elliott-McCrea
explanation · 25/02/2026 · technology, emotional-intelligence, web-development
First run the tests - Agentic Engineering Patterns - Simon Willison's Weblog
how-to · 24/02/2026 · automated-testing, ai-agents, software-engineering
go-size-analyzer
explanation · 24/02/2026 · go-tooling, binary-analysis, webassembly
A quote from Paul Ford
explanation · 23/02/2026 · vibe-coding, communication, empathy
Writing code is cheap now - Agentic Engineering Patterns - Simon Willison's Weblog
explanation · 23/02/2026 · agentic-engineering, software-development, code-quality
A quote from Summer Yue
explanation · 23/02/2026 · ai-tools, inbox-management, automation
Ladybird adopts Rust, with help from AI
explanation · 23/02/2026 · rust, ai-assisted-coding, software-engineering
Red/green TDD - Agentic Engineering Patterns - Simon Willison's Weblog
explanation · 23/02/2026 · test-driven-development, coding-agents, software-engineering
Reply guy
explanation · 23/02/2026 · ai-bots, twitter-engagement, generative-ai
Writing about Agentic Engineering Patterns
explanation · 23/02/2026 · agentic-engineering, coding-agents, software-development
London Stock Exchange: Raspberry Pi Holdings plc
explanation · 22/02/2026 · stock-market, ai-projects, raspberry-pi
The Claude C Compiler: What It Reveals About the Future of Software
explanation · 22/02/2026 · ai-coding, software-development, compiler-design
How I think about Codex
explanation · 22/02/2026 · openai, codex, ai-agents
Quoting Thibault Sottiaux
explanation · 21/02/2026 · thought-leadership, interviews, technology
Andrej Karpathy talks about “Claws”
explanation · 21/02/2026 · ai-agents, claws, openclaw
Quoting Thariq Shihipar
explanation · 20/02/2026 · Agent-Native Architecture, Prompt Engineering, Claude Code
ggml.ai joins Hugging Face to ensure the long-term progress of Local AI
explanation · 20/02/2026 · OpenAI API, AI Agents, Anthropic API
Adding TILs, releases, museums, tools and research to my blog
explanation · 20/02/2026 · Open Source Projects, Web Development, AI Agents
Taalas serves Llama 3.1 8B at 17,000 tokens/second
explanation · 20/02/2026 · AI Agents, Model Optimization, Hardware Startups
SWE-bench February 2026 leaderboard update
reference · 19/02/2026 · OpenAI API, Prompt Engineering, AI Agents
Experimenting with sponsorship for my blog and newsletter
explanation · 19/02/2026 · Blogging, Sponsorship, Independent Publishing
LadybirdBrowser/ladybird: Abandon Swift adoption
explanation · 19/02/2026 · Software Development, Programming Languages, Project Management
Gemini 3.1 Pro
reference · 19/02/2026 · Prompt Engineering, AI Agents, LangChain
Recovering lost code
how-to · 19/02/2026 · Prompt Engineering, Agent-Native Architecture, Claude Code
A quote from Martin Fowler
explanation · 18/02/2026 · llms, software-development, expert-generalists
Typing without having to type
explanation · 18/02/2026 · Programming Productivity, Type Hints, AI Agents
The A.I. Disruption We’ve Been Waiting for Has Arrived
explanation · 18/02/2026 · ai-disruption, coding-tools, technology-impact
Introducing Claude Sonnet 4.6
explanation · 17/02/2026 · ai-models, anthropic, sonnet-4-6
Rodney v0.4.0
reference · 17/02/2026 · browser-automation, cli-tools, software-release
Gemini 3 Deep Think
explanation · 12/02/2026 · Creative AI, Prompt Engineering, AI Agents
Quoting Anthropic
explanation · 12/02/2026 · Anthropic API, Claude Code
Supervisor, not overseer
explanation · 12/02/2026 · Ethical Considerations in AI, AI Agents, Language and Terminology
Covering electricity price increases from our data centers
explanation · 12/02/2026 · Energy Consumption, Corporate Responsibility, AI Agents
Introducing GPT‑5.3‑Codex‑Spark
explanation · 12/02/2026 · OpenAI API, Prompt Engineering, AI Agents
An AI Agent Published a Hit Piece on Me
explanation · 12/02/2026 · AI Agents, Open Source, GitHub
GLM-5: From Vibe Coding to Agentic Engineering
explanation · 11/02/2026 · Agent-Native Architecture, Prompt Engineering, AI Agents
Skills in OpenAI API
how-to · 11/02/2026 · OpenAI API, Prompt Engineering, Claude Code
Quoting Andrew Deck for Niemen Lab
explanation · 11/02/2026 · Large Language Models, Prompt Engineering, AI Agents
cysqlite - a new sqlite driver
explanation · 11/02/2026 · Python Programming, WebAssembly, Cython
Introducing Showboat and Rodney, so agents can demo what they’ve built
explanation · 10/02/2026 · Agent-Native Architecture, AI Agents, Software Testing
AI Doesn’t Reduce Work—It Intensifies It
explanation · 09/02/2026 · Cognitive Load, AI Agents, Sustainable Working Practices
Structured Context Engineering for File-Native Agentic Systems
explanation · 09/02/2026 · Agent-Native Architecture, AI Agents, Prompt Engineering
Quoting Thomas Ptacek
explanation · 08/02/2026 · Anthropic API, AI Agents, Vulnerability Research
Kākāpō mug by Karen James
explanation · 08/02/2026 · Personal Appreciation, Kākāpō Conservation, Ceramic Art
Vouch
explanation · 07/02/2026 · AI Agents, GitHub, Open Source Contributions
Quoting Brandon Sanderson
explanation · 03/02/2026 · Generative AI, Artistic Expression, AI Ethics
January sponsors-only newsletter is out
explanation · 03/02/2026 · AI Agents, Prompt Engineering, Agent-Native Architecture
Introducing Deno Sandbox
how-to · 03/02/2026 · Python, Deno, Security
Introducing the Codex app
explanation · 02/02/2026 · AI Agents, Agent-Native Architecture, OpenAI API
A Social Network for A.I. Bots Only. No Humans Allowed.
explanation · 02/02/2026 · AI Agents, Journalism, Generative AI
TIL: Running OpenClaw in Docker
how-to · 01/02/2026 · AI Agents, Docker, OpenClaw
Singing the gospel of collective efficacy
explanation · 31/01/2026 · Collective Efficacy, Social Impact, Community Engagement
Quoting Andrej Karpathy
explanation · 31/01/2026 · Generative AI, AI, OpenAI
Moltbook is the most interesting place on the internet right now
explanation · 30/01/2026 · AI Agents, Prompt Engineering, OpenAI API
Quoting Steve Yegge
explanation · 30/01/2026 · AI Agents, Agent-Native Architecture, Prompt Engineering
We gotta talk about AI as a programming tool for the arts
explanation · 30/01/2026 · Generative AI, AI-Assisted Programming, AI Ethics