Hey, I'm Anton Veretennikov.

Code is just the start. Shipping reliable, maintainable products is the goal.

Panex

Terminal UI for running multiple processes in parallel. Like Turborepo's TUI without the monorepo, or a zero-config tmux alternative.

Split-pane view with full PTY support (QR codes, colors, interactive prompts)
Mouse forwarding, visual select with copy, scroll pinning, nestable
Run via bunx panex or npx panex

Synset

Query WordNet semantic dictionary for definitions, synonyms, and hypernyms. CLI + TypeScript library.

Fetches and caches WordNet database automatically
Both CLI and programmatic API
Zod-validated schema parsing
Export to SQLite database

import { getDefinitions, getSynonyms } from "synset";
const defs = await getDefinitions("happy");
const syns = await getSynonyms("happy");

OSHA 30 Helper

Interactive study tool for OSHA 30 certification with quiz-based approach and 1,500 searchable questions.

Full-text search across all questions
Quiz mode with instant feedback
Mobile-friendly interface

Parcheesi

Local multiplayer board game for shared-screen play with PixiJS rendering and player-oriented UI.

Smooth 60fps PixiJS animations
Designed for shared tablet play
Touch and mouse support

Precise Colors

High-precision color space conversions for TypeScript/JavaScript. Supports 12 color models with CIE 15.3 compliance.

12 color models (RGB, Lab, LCH, etc.)
CIE 15.3 standard compliance
Tree-shakeable ESM exports

import { rgb2lab, lab2lch, lch2css } from "precise-colors";

const lab = rgb2lab({ r: 100, g: 150, b: 255 });
const lch = lab2lch(lab);
console.log(lch2css(lch)); // "lch(62.55% 62.44 279.76)"

eslint-plugin-no-in-array

Type-aware eslint rule that detects misuse of the in operator with arrays in TypeScript.

Catches common JS gotcha
Type-aware analysis
Auto-fix suggestions

// The 'in' operator checks keys, not values!
"a" in ["a", "b", "c"]; // false! indices are "0", "1", "2"
// Use .includes() instead

Favicon Fella

CLI tool that generates all favicon and app icon variants from a single PNG image.

Generates favicon.ico, Apple Touch Icon, Android Chrome icons
Smart background color detection
Outputs site.webmanifest for PWAs

# Output for each source image:
favicon-16x16.png, favicon-32x32.png, favicon-48x48.png
favicon.ico (16/32/48 bundled)
apple-touch-icon.png (180x180)
android-chrome-192x192.png, android-chrome-512x512.png
site.webmanifest

Termi-link

Drop-in replacement for terminal-link providing clickable hyperlinks in supported terminals.

Cross-platform (macOS, Linux, Windows)
Drop-in terminal-link replacement
Graceful fallback for unsupported terminals

import termiLink from "termi-link";
console.log(termiLink("Click me", "https://example.com"));

DisplayedAppSwitcher

Windows system tray utility for multi-monitor workflows using Win32 API keyboard shortcuts.

Global hotkeys for window management
Multi-monitor aware
Lightweight system tray app

P.F. Engineering

Full-stack SSR e-commerce site with searchable image galleries, Markdown content, and PayPal integration.

Server-side rendering for SEO
PayPal checkout integration
Markdown-driven content

QR Code Worker

Cloudflare Worker generating QR codes with optimized API for resource-constrained IoT devices.

Optimized for low-memory IoT
3x3 module grid packing
Edge-deployed globally

// 3x3 module grids packed into 9-bit integers
// Reduces CPU and memory overhead on low-end hardware
+-----+-----+     +-----+-----+
|0 0 0|1 1 0| ->  |  24 | 235 |
|1 1 0|1 0 1|     |     |     |
+-----+-----+     +-----+-----+

Caddy Config Injection

gRPC-based dynamic configuration server for Caddy enabling runtime route registration.

Runtime route injection
gRPC protocol
No Caddy restart required

fn := lib.Fn(*addr, &pb.Route{
  Id: "example.com",
  Matches: []*pb.Match{{
    Hosts: []string{"example.com"},
  }},
})

Kanagawa Theme

Visual Studio color theme inspired by Hokusai's Great Wave off Kanagawa for comfortable coding sessions.

Low-contrast, eye-friendly palette
Inspired by Japanese ukiyo-e art
Full syntax highlighting coverage

Go run SASS

CLI wrapper for go-libsass eliminating recompilation overhead for build pipelines.

Pre-built binary, no compilation
Faster than node-sass
Cross-platform CLI

JSON Walk

Recursive JSON traversal library for Go with path-based callbacks for flexible data extraction.

Path-based matching
Type-aware callbacks
Zero allocations on hot path

jsonwalk.Walk(&v, jsonwalk.Callback(func(path jsonwalk.WalkPath, ...) {
  if path.Path() == "[0].Config.Env" && tp == jsonwalk.Array {
    // extract data
  }
}))

Fresh

Live-reload development tool for Go that automatically rebuilds and restarts applications on source code changes.

Watches file changes recursively
Configurable via YAML
Graceful process restart

$ fresh -help
Usage of fresh:
  -c string  config file path (default "./.fresh.yaml")
  -generate  generate sample settings file

Voronoi Diagrams

Fortune's algorithm implementation for computing Voronoi diagrams in Go with O(n log n) complexity.

O(n log n) time complexity
Bounding box support
Returns edges and vertices

sites := []voronoi.Vertex{{4, 5}, {6, 5}}
bbox := NewBBox(0, 0, 20, 10)
diagram := NewVoronoi().Compute(sites, bbox, true)

Interval

Numeric range normalization library with wrap and clamp operations—ideal for polar coordinates and cyclic values.

wrap for cyclic values (angles, hue)
clamp for bounded ranges
Integer and float variants

interval.WrapInt(0, 360, 400)  // => 40
interval.WrapInt(0, 360, -90)  // => 270
interval.ClampInt(0, 100, 500) // => 100

dos2unix

CLI utility for converting Windows line endings to Unix format.

Skips non-text files automatically
Recursive directory processing
In-place conversion

Terminal

Cross-platform terminal control library for Go with cursor positioning, colors, and alternative buffer.

Cursor and color control
Alternative screen buffer
Windows and Unix support

Ifchanged

File change detection library for Go using SHA256 hashing for build automation.

SHA256-based change detection
Persistent hash storage
Ideal for build scripts

Tree Structures

Dart red-black self-balancing BST with O(log n) operations and Graphviz visualization support.

Self-balancing red-black tree
O(log n) insert/delete/search
Graphviz DOT output

Gamut Mask

Color theory tool implementing gamut masking techniques for harmonious palette generation.

Interactive gamut mask editor
Real-time palette preview
Export color schemes