Olddonkey Skills

Open-source Agent Skills distilled from workflows that ran, broke, and got fixed.

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Three Claude Code skills so far, plus a Cursor Plugin that ships two engineering skills:

• implementation-loop — delegate implementation to Codex, grok, or cursor-agent without delegating judgment: Claude reviews the real diff, runs the full test gate, and ships only what it would sign its name to. Those three are the agent-driven backend dial; Claude Code is also shipped as a fourth backend module for coordinator use.
• engineering-mode — goal-first engineering ownership: investigate, design, and plan, then drive implementation-loop unit by unit.
• cursor-implementation-loop — Cursor Plugin with the plan-first implementation loop and the goal-first cursor-engineering-mode wrapper; the parent agent reviews, gates, and publishes while an implementer subagent writes code.
• web-slides — turn material or outlines into click-driven 16:9 HTML slide decks for live presenting, with 24 built-in themes and a presenter view that keeps speaker notes off the shared screen.

Installation

Marketplace (recommended)

Inside Claude Code, add the marketplace once, then install the skills you want:

/plugin marketplace add olddonkey/olddonkey-skills
/plugin install implementation-loop@olddonkey-skills
/plugin install engineering-mode@olddonkey-skills
/plugin install web-slides@olddonkey-skills
/reload-plugins

These plugins were renamed by dropping the codex- prefix when the loop gained Codex, grok, and cursor-agent backends. A Claude Code coordinator backend module is also available. If the former Codex-prefixed plugin IDs are installed, uninstall them and install implementation-loop and engineering-mode instead.

The implementation-loop adapter scripts moved from scripts/ into backends/<name>/ for the 0.4.x release. The old executable paths forward for that release so existing harnesses keep working; update external callers to the new module paths before the shims are removed in release 0.5.0.

engineering-mode requires implementation-loop; the Codex backend needs an authenticated codex CLI and no additional Claude Code plugin — see Setup below. web-slides needs nothing beyond Node.js for the generated slide project.

Manual

Copy into your personal skills directory:

git clone https://github.com/olddonkey/olddonkey-skills /tmp/olddonkey-skills
mkdir -p ~/.claude/skills
cp -R /tmp/olddonkey-skills/skills/<skill-name> ~/.claude/skills/

Or symlink a clone for pull-to-update:

git clone https://github.com/olddonkey/olddonkey-skills ~/Documents/olddonkey-skills
mkdir -p ~/.claude/skills
ln -s ~/Documents/olddonkey-skills/skills/<skill-name> ~/.claude/skills/<skill-name>

If you created ~/.claude/skills for the first time during an active Claude Code session, restart the session so the new top-level directory is discovered. If your agent does not follow symlinks in its skills directory, use the copy option and re-copy after git pull.

Cursor Plugin

For Cursor, the one-line installer copies the standalone skill and both agents into Cursor's discovered directories. It works on all current builds and on a personal or temporary/company machine — it only writes under your home directory: