mkreyman

mutate.sh -- prove a test can actually fail

Break the code on purpose. Run the test. If it doesn't go red, its green never meant anything.

./mutate.sh <file> --old '<working text>' --new '<broken text>' -- <your check command>

The exit code is inverted, deliberately:

mkreyman

Two hooks that make a coding agent actually use your knowledge base

A knowledge base your agents ignore is a folder. These are the two Claude Code hooks that changed that for me: one makes searching cheaper than asking, the other makes writing things down automatic.

Both are generalized -- set KB_SEARCH_TOOL to whatever your KB's MCP search tool is called.

---

mkreyman

Methylation Panel Report from Raw DNA (23andMe / MyHeritage / AncestryDNA)

Usage:

# Download your raw DNA export from 23andMe, MyHeritage, AncestryDNA, or FTDNA
# Then run:
python3 analyze_methylation.py your_raw_dna.csv --name "Your Name"

# Outputs:
# - Text report to stdout

mkreyman

Adversarial multi-agent code review (that actually filters false positives)

How I review code -- including AI-written code -- with a squad of AI agents, without drowning in confident-but-wrong findings. Product-agnostic. I run it in Claude Code with parallel sub-agents, but the shape ports to any setup where you can run more than one agent.

The one rule

The agent (or person) that wrote the code never reviews or approves it. Reviewers and the verifier are separate from the author. Everything below exists to enforce that.

Why not just "AI, review my PR"

mkreyman

#!/usr/bin/env node
// (c) Anthropic PBC. All rights reserved. Use is subject to the Legal Agreements outlined here: https://code.claude.com/docs/en/legal-and-compliance.

// Version: 2.0.76

// Want to see the unminified source? We're hiring!
// https://job-boards.greenhouse.io/anthropic/jobs/4816199008
import{createRequire as Ez9}from"node:module";var Vz9=Object.create;var{getPrototypeOf:Hz9,defineProperty:CF1,getOwnPropertyNames:Dz9}=Object;var Fz9=Object.prototype.hasOwnProperty;var l=(A,Q,B)=>{B=A!=null?Vz9(Hz9(A)):{};let G=Q||!A||!A.__esModule?CF1(B,"default",{value:A,enumerable:!0}):B;for(let Z of Dz9(A))if(!Fz9.call(G,Z))CF1(G,Z,{get:()=>A[Z],enumerable:!0});return G};var U=(A,Q)=>()=>(Q||A((Q={exports:{}}).exports,Q),Q.exports);var M5=(A,Q)=>{for(var B in Q)CF1(A,B,{get:Q[B],enumerable:!0,configurable:!0,set:(G)=>Q[B]=()=>G})};var O=(A,Q)=>()=>(A&&(Q=A(A=0)),Q);var LA=Ez9(import.meta.url);var zz9,cfA;var $F1=O(()=>{zz9=typeof global=="object"&&global&&global.Object===Object&&global,cfA=zz9});var Cz9,

mkreyman

"use strict";

var fs     = require('fs');
var path   = require('path');
var AWS    = require('aws-sdk');
var util   = require('util');
var stream = require('readable-stream');
var _      = require('lodash');

mkreyman

Useful Links

• Slides: Lesser known features in Cypher - Alex Price

• Cypher Query Tuning - Michael

• Cypher Query Tuning - Mark & Petra

mkreyman

version: "3.3"
services:
  neo4j:
    image: neo4j:latest
    tty: true
    environment:
      - NEO4J_AUTH=none
      - NEO4J_dbms_unmanaged__extension__classes=org.neo4j.graphql=/graphql
      - NEO4J_dbms_security_procedures_unrestricted=apoc.\\\*
      - NEO4J_apoc_import_file_enabled=true

mkreyman

<style>
.donate-button {
    text-align: center;
}
.donate-button .bitcoin-address {
    font-size: 1.5em;
}
</style>

<div class="donate-button">

mkreyman

def to_struct(kind, attrs) do
  struct = struct(kind)
  Enum.reduce Map.to_list(struct), struct, fn {k, _}, acc ->
    case Map.fetch(attrs, Atom.to_string(k)) do
      {:ok, v} -> %{acc | k => v}
      :error -> acc
    end
  end
end