Founder and CEO of Oxagen
I build agents that ship on their own.
I research how coding agents work and where they fail. I build them too, including agents that write their own tools. The goal is software that agents deliver on their own, and that still scales and stays easy to maintain. I wrote code by hand for 16 years before I handed all of it to agents in 2026.
Activity
27,022 contributions in 225 days
Each dot is one day on GitHub. Before 26 February 2026, Mac wrote his code by hand. After it, agents wrote the code and he directed them, read their work, and decided what merged.
- Contributions in all of 2025
- 38Before agents wrote the code
- Contributions since 26 Feb 2026
- 27,022225 days
- Merged pull requests
- 7,102All time, every repository
- Most in one day
- 1,144August 30, 2026
- Longest daily streak
- 62Days in a row
- Active days in the last year
- 211Out of 365
How these numbers are counted
- Contributions are GitHub's contribution calendar counts, which include private contributions Mac has chosen to show.
- This total adds up every day from February 26, 2026, when agents began writing Mac's code, through today.
- Pull request and issue counts are all-time GitHub search results, which cover only the repositories macanderson's token can see.
- The longest streak is the most days in a row with at least one contribution each.
Books
Books
Guide
How to Own Intelligence
A step-by-step guide to building a data pipeline for fine-tuning large language models on your own data
17 chapters, 119 sources, 1 h 49 min to read
Field manual
How to Build Autonomous Coding Agents
Build the deterministic system around the model. Then operate the agents you run: identity, authority, budget, equipment, and a record another person can read.
21 parts, 27 sources, 1 h 39 min to read
Research
Latest research
- October 9, 2026How to Own IntelligenceEvery coding-agent session your team runs produces a trace. Kept and graded by an oracle the agent cannot touch, those traces become the training set for a model you own. This book covers the oracle, the air gap, the one-bit verdict, the harness hooks that collect traces for free, how much data a fine-tune needs, and the pipeline that delivers new weights every week.109 min
- September 30, 2026Agents are waiting on a process built for peopleAn agent can write a change in minutes. Then the change waits for a person to read it. This post measures that wait, what eight companies changed about it, and how Oxagen ships at every hour.11 min
- September 16, 2026Steering a run you are not watchingWhen a long run goes wrong, most teams can stop it or type at it. Both work badly. A steer is a third option. It is a message with a delivery mode, a status, and a record.7 min
- September 16, 2026The agent time horizon is doublingMETR measures how long a task an agent can finish on its own. That length has doubled about every seven months since 2019. This post covers what week-long runs mean for supervision.7 min
- September 16, 2026The problem is not slop, it is your processThe worry about AI slop is about output quality. The measurements point to a different cause. Teams give an agent a workflow built for people and expect it to work.7 min
Work
Products
Company
Oxagen
Workforce management for autonomous agents. Each agent gets an identity, a mandate that sets what it may do and spend, the tools it needs, and a record of what it did.
Wraps Claude Code and Codex
Open source, Rust
Stella
A fast, model-agnostic terminal coding agent. Its definition of done is a witness test: one that fails on the old code and passes on the new.
58 of 89 on Terminal-Bench 2.1, against 44 for Claude Code on the same model
Benchmarks
Arena
Runs a coding agent head to head against Claude Code, Gemini, and other agents, with regression checks that keep it improving instead of drifting.
Rules published before each run
Open specification
Context Graph Protocol
A typed graph format for an agent's context: how to represent it, exchange it, and account for every token of it.
SDKs for TypeScript, Python, and Go
For agents
Agent access
This site is written for AI agents as well as people. Point yours at it and it reads the same facts you do.
See the site blueprint- /llms.txt
A map of the whole site in the llms.txt format.
- /llms-full.txt
Every page in one markdown file.
- /manual/write-the-mandate.md
Any page as markdown. Add .md to the address.
- /mcp
A read-only MCP server with search and page tools.
Add the MCP server to Claude Code:
claude mcp add --transport http macanderson https://macanderson.com/mcp
Subscribe
Updates by email
New research, field manual updates, and the first episodes of Mac's video series go to subscribers first.