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specseal

specseal is a plugin for Claude Code from MichaelYcJo/SpecSeal. Its manifest loads nothing; the 22 skills, 5 agents, 4 hooks it bundles cost 2,235 tokens per session together, scanned A, original, MIT.

A plugin for specification-driven software work, where written requirements guide implementation and review. It connects coding agents with review steps, enforcement hooks, an evidence record, and checks for differences between the specification and the code.

In plain words
What is it for?
Use it to coordinate implementation and review agents, enforce project checks, record verification evidence, detect specification drift, and support migrations from older code.
Why use it?
It helps keep implementation tied to the agreed requirements and makes review evidence easier to track. It is also intended to catch drift, meaning the code gradually stops matching the specification.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

not rated 1repo changed 4d ago A scan tokens not measured original MIT

Good fit Use it to coordinate implementation and review agents, enforce project checks, record verification evidence, detect specification drift, and support migrations from older code.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add MichaelYcJo/SpecSeal
/plugin install specseal
View source ↗ MichaelYcJo/SpecSeal
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/MichaelYcJo/SpecSeal

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.

agentmods badge for specseal

README.md
[![agentmods](https://agentmods.dev/badge/plugins/michaelycjo/specseal/specseal/github.svg)](https://agentmods.dev/plugins/michaelycjo/specseal/specseal)
Your own site
<a href="https://agentmods.dev/plugins/michaelycjo/specseal/specseal"><img src="https://agentmods.dev/badge/plugins/michaelycjo/specseal/specseal/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.

agentmods 80×15 button for specseal

Your own site · 80×15
<a href="https://agentmods.dev/plugins/michaelycjo/specseal/specseal"><img src="https://agentmods.dev/badge/plugins/michaelycjo/specseal/specseal.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 The manifest loads nothing itself; its 22 skills, 5 agents, 4 hooks cost 2,235 tokens a session between them.
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

specseal 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 4d 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.

.claude-plugin/plugin.json · 21 lines

What it actually says

{
  "name": "specseal",
  "displayName": "SpecSeal",
  "version": "0.22.4",
  "description": "SpecSeal — specs, sealed: an implement/review agent chain with hook enforcement, rules that name the tests holding them, and a tool-agnostic review handoff protocol.",
  "author": {
    "name": "MichaelYcJo"
  },
  "homepage": "https://github.com/MichaelYcJo/SpecSeal",
  "repository": "https://github.com/MichaelYcJo/SpecSeal",
  "license": "MIT",
  "keywords": [
    "spec-driven-development",
    "code-review",
    "agents",
    "hooks",
    "legacy-migration",
    "verification"
  ]
}
Contents

What it installs

The manifest is a name and a version. 22 skills, 5 agents, 4 hooks travel with it, and installing the plugin installs all of them — 2,235 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Files

What ships with it

1 file beside plugin.json in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

  1. 4d ago Changed 31801f9fa6db
  2. 7d ago Changed 114a91e5de75
  3. 11d ago Changed 3cc18f5b6bdd
  4. 12d ago Changed 3f79e513ef06
  5. 14d ago Changed · -2 lines 6f8ba7479fd9
  6. 17d ago Changed 5dd0315612aa
  7. 24d ago Changed f772231d7c74
  8. 25d ago Changed 6dd8a347e7b9
  9. 26d ago Changed c78a1291ce95
  10. 27d ago First seen · 23 lines scan A 87f518ca8721

Subscribe to this mod's changes

specseal is a plugin published in the GitHub repository MichaelYcJo/SpecSeal (1 stars, last pushed 4d 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.

Building agentsClaude CodeCode reviewai-agentsclaude-code-plugindeveloper-toolsevidence-ledger
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