A portable workflow for coding agents that organizes software work into planning, building, reviewing, testing, shipping, and reflection. It works with Claude Code and pi, two tools for working with code through an AI agent.

Use it to guide a feature or fix from an initial plan through testing, release, and a review of what could be improved.

It gives development tasks a repeatable sequence and keeps the same workflow available across both supported tools.

tempest — Plugin by mtthsnc

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Claude Code

/plugin marketplace add mtthsnc/tempest

agentmods

npx agentmods add plugins/mtthsnc/tempest/marketplace

Clone the repo

git clone --depth 1 https://github.com/mtthsnc/tempest

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

tempest scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude-plugin/marketplace.json · 22 lines

What it actually says

{
  "$schema": "https://anthropic.com/claude-code/marketplace.schema.json",
  "name": "tempest",
  "description": "tempest — a cross-harness software factory: opinionated build workflows as portable Agent Skills for Claude Code and pi.",
  "owner": {
    "name": "mtthsnc"
  },
  "plugins": [
    {
      "name": "tempest",
      "description": "A software factory for AI coding agents: opinionated plan -> build -> review -> test -> ship -> reflect workflows, shipped as portable Agent Skills that run identically on Claude Code and pi.",
      "author": {
        "name": "mtthsnc"
      },
      "category": "workflow",
      "source": "./plugins/tempest",
      "version": "0.1.0",
      "homepage": "https://github.com/mtthsnc/tempest"
    }
  ]
}

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

yesterday First seen · 22 lines scan A f5977b4f17ba

Subscribe to this mod's changes

tempest is a plugin published in the GitHub repository mtthsnc/tempest (2 stars, last pushed 2mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Code review Git and workflow Testing agent-skills ai-agents claude-code developer-tools pi software-factory

tempest

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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