Relay Task Kernel — Productivity skill for Claude Code

RTK — Relay Task Kernel

**One handoff contract that Claude Code, Codex, Gemini CLI and Copilot all read.**

[](LICENSE)  

繁體中文說明請看 [README.zh-TW.md](README.zh-TW.md)。

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The problem

You use more than one coding agent. Each wants its own instruction file:

AGENTS.md                        Codex
CLAUDE.md                        Claude Code
GEMINI.md                        Gemini CLI
.github/copilot-instructions.md  Copilot

So you write the rules four times. Then you tighten one rule and update three files. Then a new session starts, the agent has no idea what happened yesterday, and you re-explain the project for the ninth time — right before it force-pushes something.

RTK makes those four files thin pointers to one shared contract, and gives the project a small, deliberate memory that survives across sessions and across agents.

Quick start

npx github:leavemagic-cyber/relay-task-kernel init --all

`--all` writes the machine-wide protocol to `~/.rtk/` **and** the project overlay into the current repo. Answer four questions, or pass `--yes` to take the detected values.

Already have a `CLAUDE.md` you like? Keep it. RTK only manages the region between its own markers and never touches the rest of the file.

What it writes

~/.rtk/                        the protocol, shared by every repo
├── RTK.md                     load order + core contract
├── rules/                     core, forbidden-actions, code-edit
├── templates/                 task packet, context capsule, memory patch, handoff
└── schemas/                   machine-readable task packet
~/.codex/AGENTS.md             Codex global entry

your-repo/
├── START_HERE.md              the one card every agent reads first
├── AGENTS.md                  ─┐
├── CLAUDE.md