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mattmc3 / CLAUDE.md
Last active July 2, 2026 14:05
AI Core Principals

Working Principles

  1. Don't assume. Don't hide confusion. Surface tradeoffs. When unsure, ask or flag it rather than guessing.
  2. Smallest change that gets one concrete thing working. Change one thing, verify it, move on. Never rewrite, regenerate, or restructure broadly (many files or architecture) without explicit approval. When unsure, do less and check in.
  3. Touch only what you must. Clean up only your own mess.
  4. Define success criteria, then loop until verified. Build and test to confirm before declaring done.
  5. Be concise. Lead with the answer. Give the answer or do the work first, then a short summary. Cut long option-analysis and trade-off menus unless explicitly asked. I steer actively and pull detail when wanted.
  6. No AI fingerprints anywhere: code comments, commits, PRs, docs.

Scope

@mattmc3
mattmc3 / myscript.zsh
Created March 24, 2026 13:16
Zsh - test for antidote
echo "myscript.zsh gist"
@mattmc3
mattmc3 / simple-dark-mode-toggle.js
Last active March 18, 2026 14:01
TamperMonkey script to toggle dark mode
// ==UserScript==
// @name Simple Dark Mode Toggle
// @namespace http://tampermonkey.net/
// @version 2.3
// @description Toggle dark mode on any site with UI pill toggle and keyboard shortcut
// @match *://*/*
// @grant GM_registerMenuCommand
// @grant GM_unregisterMenuCommand
// @grant GM_getValue
// @grant GM_setValue
@mattmc3
mattmc3 / smart-up-and-down.zsh
Last active January 8, 2026 13:37
Fish like up/down history/buffer navigation in Zsh
# 0 = history mode, 1 = edit mode
typeset -g __editing=0
# Up: history until editing begins
function smart-up() {
if (( __editing )); then
zle up-line-or-history
else
zle up-history
fi
@mattmc3
mattmc3 / expandShortFlags.go
Created September 4, 2025 01:00
Go expandShortFlags
// turn -abc5 into -a -b -c5
// ex:
// takesValue := map[rune]bool{'c': true}
// expandedArgs := expandShortOpts(os.Args[1:], takesValue)
func expandShortFlags(args []string, withValue map[rune]bool) []string {
var out []string
doubledash := false
for _, arg := range args {
if doubledash {
out = append(out, arg)
@mattmc3
mattmc3 / normalize_flags.sh
Last active June 17, 2025 02:44
Bash getopts - normalize flags
#!/usr/bin/env bash
# Normalize --long-flags to -s short ones for use with getopts.
normalize_flags() {
local shortopt longopt
local -a args=()
local -A spec=()
# Process option definitions until we hit the -- separator
while [[ "$#" -gt 0 && "$1" != -- ]]; do
@mattmc3
mattmc3 / colorize-paths.awk
Last active March 8, 2025 20:36
awk - Colorize any path in command output
#!/usr/bin/awk -f
# colorize-path - add color to paths in specified field
# usage:
# command | ./bin/colorize-paths
# git ls-tree -r HEAD | ./bin/colorize-paths -v field=4
# ls -la | ./bin/colorize-paths -v field=9
#
BEGIN {
@mattmc3
mattmc3 / magic-enter.xsh
Created February 26, 2025 21:02
Xonsh magic enter
from xonsh.built_ins import XSH
$MAGIC_ENTER_GIT_COMMAND = "git status -sb ."
$MAGIC_ENTER_OTHER_COMMAND = "ls -lahF ."
$MAGIC_ENTER_RUN_COMMAND = ""
@events.on_transform_command
def magic_enter(cmd, **_):
"""Custom Enter key behavior: runs 'ls' if no command was given."""
if not cmd.strip():
@mattmc3
mattmc3 / get-script-dir.fish
Created February 26, 2025 13:21
Fish: Get directory of current script
#!/usr/bin/env fish
path resolve (status --current-filename)/..
@mattmc3
mattmc3 / prompt.sh
Created February 26, 2025 12:48
Bash prompt bottom padding
# 5 lines from the bottom
PS1=$'\n\n\n\n\n\e[5A'"$PS1"