OpenSpec Tutorial (2026): Spec-Driven Development in Claude Code, Step by Step
Key Takeaways OpenSpec is a free command-line tool that makes your coding agent write a short plan...
Tutorials
XMarkdown: Markdown charts, diagrams and math for AI reports
Abstract XMarkdown is an open-source Markdown renderer for documents that need charts,...
"Done" wasn't done: the AI kept describing the work instead of checking it
The most important lesson from building ParkEase with an AI wasn't about code. It was about one word:...
Your embedding model is a schema decision: how to choose it and plan the re-embed
Monday AI Insight. Most RAG projects pick an embedding model in about five minutes: open a...
Scaffolding KiCad-MCP-Bridge: How We Built a Distributed AI PCB Engine (And Solved the Lab Security Problem)
A deep dive into building an open-source distributed hardware engine bridging AI agents on laptops to KiCad workstations over Thunderbolt, and architecting zero-port multi-tenant s...
"When a Comment Calls Itself 'Known,' My Reviewer Didn't Buy It"
My CLAUDE.md in this repo has one line near the bottom that I don't fully control: "after your work...
"I Could Not Build the Condition Where My Agent Didn't Know Today's Date"
A trending post this week described an agent that had the correct timestamp sitting right in its...
Can You Actually Build a Useful Agent Team Without Code?
This came up in Chinese AI developer communities recently: a post claiming that anyone, not just...
I built a daily GitHub AI leaderboard — 3 things nobody tells you about star counts
I'm a solo developer in China. In August I got annoyed enough by AI tool directories to build my own,...
OpenAI Posted 722 Math Papers. Who Checks the Checker?
On Oct 6, OpenAI put 722 mathematics manuscripts online, and only one had a human edit before...
I Built, Tested & Reviewed an App From My Phone with Codex (Step-by-Step)
How to Use Codex on Your Phone: Setup, Screenshots, and Your First Commit ...
Reverse Prompt Injection: When the Environment Hijacks Authority (Part 3)
Reverse Prompt Injection: When the Environment Hijacks Authority (Part 3) In Part 1, I...
AI SDK 7.0.163 Added Two Stream Parts in a Patch Release. My Exhaustive Switch Stopped Compiling
Upgrading ai from 7.0.162 to 7.0.163+ adds ping and steering-message to TextStreamPart, so an assertNever switch over fullStream stops compiling. Tested fix and runtime behavior.
bisect2-1794189432390-1
A 30-day case study of four coding agents on one repository, and what to pin instead of writing...
bisect-1794189340324-1
A 30-day case study of four coding agents on one repository, and what to pin instead of writing...
probe-t4-full-unfenced-1794189257860
Liquid syntax error: 'raw' tag was never closed
Your Read-Only Bot Isn’t Read-Only Safe
Somebody on r/kubernetes asked the question properly this week: what should a read-only debugging bot...
The 3 A.M. Chai Rule: Replace 40 Flapping Alerts with Three Real SLOs
The big observability vendors just admitted out loud what every on-call engineer has known for ten...
The Three Guard Rails Every AI Code Review Rollout Needs
Your bot just sent you an invoice for its own learning curve. Pull up a chair, grab a cup of chai,...
The Four Ghosts in Your Data Warehouse (And How to Evict Them)
Forgotten copies, full price. Pull up a chair, grab some chai, and let me tell you about a quiet...
How We Took Second at a Hackathon with Codex and 18 Git Worktrees
A friend and I took second place at the Codex Community hackathon in Guadalajara with Panas. Across...
Prose Does Not Bind Agents: Four Safeguards That Fail the Build
Four safeguards that fail a build when coding agents break them, from a 30-day case study on one repository, with every figure reproducible.
We built a ChatGPT-style chat with no AI framework
We built the AI chat in Sybill by hand, with ChatGPT as our reference. In January 2025 we started...