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plan-check

v1.2.0

Pre-implementation plan review. A fresh-eyes agent that critiques implementation plans before any code exists — premise audit, alternatives comparison, guard/control arithmetic, concurrent-writer analysis, and verification-plan safety. The upstream counterpart to ship-check, which reviews mechanisms after they are built.

Claude Code1 Skill

0 GitHub starsUpdated 2 weeks ago

Directory evidence

Runtimes
Claude Code
Parsed components
1 skill or MCP entry
Source updated
Oct 4, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install plan-check for Claude Code

Installs for the current user
claude plugin marketplace add IchenDEV/agent-plugin-mkt
claude plugin marketplace update agent-plugin-marketplace
claude plugin install plan-check@agent-plugin-marketplace

Paste and run these commands in a terminal with Claude Code. They add and refresh the PluginsMP catalog, then install this plugin.

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/aliasunder/agent-plugins

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The plugin root is plugins/plan-check/.

Plugin files

plugins/plan-check/
├── .claude-plugin/plugin.json
└── skills/plan-review/SKILL.md

Included Skills1

plan-reviewskills/plan-review/SKILL.md

Adversarial critique of an implementation plan BEFORE any code exists — premise audit, alternatives comparison, guard/control arithmetic, concurrent-writer analysis, mechanism-cost proportionality, and verification-plan quality. Derived from analysis of real planning failures that survived a full post-implementation review pipeline because review verifies mechanisms, not premises. Use when asked to "review this plan", "critique the plan", "plan check", "is this plan ready", "review the task note before I start", or before implementing any card that adds behavior, a guard, or spans sessions. NOT for: reviewing implemented code or PRs (use ship-check / pr-review), writing the plan itself (that's fable-mode + Plan agents), or auditing tests (test-audit).

Plugin manifests1

plugins/plan-check/.claude-plugin/plugin.json
{
  "name": "plan-check",
  "version": "1.2.0",
  "description": "Pre-implementation plan review. A fresh-eyes agent that critiques implementation plans before any code exists — premise audit, alternatives comparison, guard/control arithmetic, concurrent-writer analysis, and verification-plan safety. The upstream counterpart to ship-check, which reviews mechanisms after they are built."
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[plan-check on Agent Plugins Marketplace](https://pluginsmp.com/plugins/plan-check)