What is spec-coach-marketplace?

A plugin marketplace listing for spec-coach, a tool that reviews development specifications against six quality areas such as testability, edge cases, failure handling, and constraints.

Use it to review specifications, requirements, user stories, and acceptance criteria, and to judge how much independent action an agent should take.

It helps reveal missing details in requirements before development begins, when unclear specifications can lead to rework.

spec-coach-marketplace — Plugin for Claude Code by boxabirds

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.

Clone the repo

git clone --depth 1 https://github.com/boxabirds/spec-coach

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/boxabirds/spec-coach/marketplace/github.svg)](https://agentmods.dev/plugins/boxabirds/spec-coach/marketplace)

Your own site

<a href="https://agentmods.dev/plugins/boxabirds/spec-coach/marketplace"><img src="https://agentmods.dev/badge/plugins/boxabirds/spec-coach/marketplace/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/boxabirds/spec-coach/marketplace"><img src="https://agentmods.dev/badge/plugins/boxabirds/spec-coach/marketplace.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

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. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

spec-coach-marketplace 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 2mo ago.

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.

marketplace/.claude-plugin/marketplace.json · 32 lines

What it actually says

{
  "$schema": "https://anthropic.com/claude-code/marketplace.schema.json",
  "name": "spec-coach-marketplace",
  "owner": {
    "name": "Great Creations London Ltd",
    "email": "[email protected]"
  },
  "metadata": {
    "description": "Specification quality coaching tools for development teams",
    "version": "1.0.0"
  },
  "plugins": [
    {
      "name": "spec-coach",
      "source": {
        "source": "github",
        "repo": "boxabirds/spec-coach"
      },
      "description": "Coaches you on specification quality using a six-dimension rubric — testability, edge cases, failure modes, constraints, decomposition, and autonomy calibration",
      "keywords": [
        "specifications",
        "requirements",
        "acceptance-criteria",
        "user-stories",
        "spec-quality",
        "coaching"
      ],
      "category": "workflow"
    }
  ]
}

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.

2mo ago First seen · 32 lines scan A 44e4a47cc84f

Subscribe to this mod's changes

spec-coach-marketplace is a plugin published in the GitHub repository boxabirds/spec-coach (5 stars, last pushed 8mo ago), licensed Apache-2.0. 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.

spec-coach-marketplace next to 6 plugins from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
spec-coach-marketplaceboxabirds/spec-coach	Plugin	5	8mo ago	Apache-2.0	A	—	Claude Code
humanizerblader/humanizer	Plugin	67k	12d ago	MIT	A	—	Claude Code
claude-plugins-official marketplaceanthropics/claude-plugins-official	Plugin	47k	today	Apache-2.0	A	—	Claude Code
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knowledge-work-plugins marketplaceanthropics/knowledge-work-plugins	Plugin	35k	2d ago	Apache-2.0	A	—	Claude Code
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