Tech writing + tools that work + standalone projects Kevin
Three things, each with a job: the blog is for thinking and notes, the tools open and run in your browser (nothing leaves), and projects are downloadable or installable products.
$ ls
blog/ # Blog: notes & writing
tools/ # Tools: open and use
projects/ # Projects: standalone productsFeatured Posts
Recent thoughts and technical deep-dives
DeepSeek Harness Developer Preview: Everything Is a Plugin
DeepSeek Harness Developer Preview (v0.1) is now open for testing under the MIT license: models, tools, skills, sessions, sandboxes, loops, scheduling, and UI are all composed from plugins. The four run modes and how to get started.
OpenClaw: Core Architecture, How It Works, and Agent Deployment
OpenClaw's core architecture, how it works, and multi-agent deployment: workspace bootstrap files, per-session transient agents, session compaction/pruning memory, and the sessions_send vs sessions_spawn config.
DeepSeek Harness Hands-On: What the Other Half, Beyond the Model, Actually Buys You
A hands-on record of DeepSeek Harness after its open-source release: getting all four entry points (Web/Headless/Python SDK) running, whether Trajectory and the system prompt can be reconstructed from logs, a same-model (Kimi K3) tool-trajectory comparison against Kimi Code, and the same V4 Pro building a jump game under each harness.
Online Tools
Open and use — data never leaves your browser
US Mortgage Calculator
Pure client-side mortgage calculator: P&I, property tax, insurance, HOA, PMI, extra payments, 15/20/30 year comparison and amortization schedule. Data never leaves your browser.
Scientific Calculator
Free online scientific calculator: trigonometric functions, logarithms, exponentials, factorial, power operations, parentheses, history, and memory — pure client-side, nothing leaves your browser.
Currency Converter
Free online currency converter covering 166 currencies, rates cached hourly.
JSON Formatter / Minifier
Parse, format, and minify JSON — pure client-side, never uploaded.
Unix Timestamp Converter
Convert between Unix timestamps and dates, seconds or milliseconds.
Standalone Projects
Downloadable / installable products
Web to Markdown Converter
Browser extension that saves any web page as Markdown — tables, language-tagged code blocks, and lazy-loaded images are all handled and bundled into a single zip, with oversized images auto-compressed. Runs in your browser, so it captures what your AI agent's crawler can't reach.