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Achievement: Pair Extraordinairex2Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: Starstruckx2Achievement: Arctic Code Vault Contributor

Achievements

Achievement: Pair Extraordinairex2Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: Starstruckx2Achievement: Arctic Code Vault Contributor

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craigk5n/README.md

Craig Knudsen's Profile

Principal AI Engineer with 25+ years building production systems — currently focused on agentic AI and the Model Context Protocol (MCP). Creator and maintainer of WebCalendar (1M+ downloads). Shipping open source since before the term existed (see the last bullet).

AI / MCP

  • WebCalendar now includes an MCP server that exposes calendar operations (events, search, scheduling) to AI assistants.
  • Agentic Dev Team - A new project I'm experimenting with. A self-hosted autonomous coding team. You describe what to build and approve ideas; a pipeline of AI agents using opencode handles planning, coding, review, testing, and security checking end-to-end.

Actively maintained

  • WebCalendar — PHP 8 LAMP multi-user calendar I created and maintain; 1M+ downloads, 30+ translations. Recently modernized the UI (Bootstrap/jQuery, replacing legacy Prototype.js) and rewrote the web-based installer for PHP 8.
  • webcalendar-core — modern PHP 8.1+ Clean Architecture library (26 services, 17 repository interfaces, RFC 5545 iCalendar); this will power the next generation of WebCalendar.
  • php-icalendar-core — RFC 5545-compliant iCalendar parser/writer for PHP 8.1+; this will also be critical in the next generation of WebCalendar.
  • Cliquetool — Go tool for finding cliques in a graph (built to teach myself Go).
  • ilibgo — Go image library with an X11-style API; a port of my C ilib
  • GTimer - Linux GTK app for tracking time spent

Contributions

  • CVE Services — contributed to MITRE's CVE Program REST API (containerizing the NodeJS app; also built the AWS CodePipeline CI/CD).

Older / archived

Elsewhere

LinkedIn · k5n.us · craig AT k5n.us

Fun fact: my first open-source release was xapplaunch, a system menubar for HP-UX/SunOS/AIX/OSF-1, posted to a public FTP server in 1995 — three years before the term "open source" existed.

Popular repositories Loading

  1. webcalendar webcalendar Public

    WebCalendar is a PHP application used to maintain a calendar for a single user or an intranet group of users. It can also be configured as an event calendar.

    PHP 172 80

  2. gtimer gtimer Public

    GTimer is a GTK application for timing how you spend your time among various projects and tasks with support for generating plain text and HTML reports.

    C 15 6

  3. webcalendar-docker webcalendar-docker Public

    Docker container for WebCalendar

    Shell 8 2

  4. k5ncal k5ncal Public

    Java-based calendar application that leverages existing standards (iCalendar) to create an open source cross-platform multi-user desktop calendar application.

    Java 6 5

  5. javacaltools javacaltools Public

    Library for parsing/importing and writing iCalendar-formatted data

    Java 2 1

  6. php-icalendar-core php-icalendar-core Public

    Modern RFC 5545-compliant iCalendar parser & writer for PHP 8.1+ with strict/lenient modes, recurrence support, and rich text extensions

    PHP 2