Justify
Audit changes for additive bias, Iron Law compliance, and minimal intervention. Justifies every change against a "simplest safe change" standard.
- Type
- Slash Command
- Repository
- athola/claude-night-market
- GitHub stars
- 339
- License
- MIT
- Repo last updated
- Sep 24, 2026
- Source file
- plugins/imbue/commands/justify.md
What Justify is
Justify is a slash command published in the athola/claude-night-market repository on GitHub, which has about 339 stars. The repository describes itself as: “23 Claude Code plugins: TDD enforcement hooks, git/PR workflows, spec-driven development, code review, project lifecycle, fix-from-error, maintenance automation, context optimization, research, and multi-LLM delegation. 186 skills, 128 commands, 54 agents.”
A slash command is a reusable prompt saved as a markdown file and run by typing its name after a slash. In Claude Code, custom commands have been merged into skills: a file in .claude/commands/ and a skill folder in .claude/skills/ both create the same kind of command, and existing command files keep working.
Justify gives you a repeatable way to run the same instructions without retyping them, optionally with arguments.
How to install Justify
Claude Code
- Download justify.md from the repository.
- Save it to ~/.claude/commands/ (all projects) or .claude/commands/ (one project). As a skill, you can instead save it as ~/.claude/skills/<name>/SKILL.md.
- Run it by typing / followed by its name.
Claude Cowork
- Turn the command into a skill: create a folder with the file saved as SKILL.md and zip it.
- In Customize → Skills, click +, then upload the ZIP.
- Run it from any task with / and the skill name.
New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.
Inside the source file
An excerpt from plugins/imbue/commands/justify.md, shared under the repository's MIT license. Read the full file on GitHub.
Post-implementation audit that forces honest accounting of every change. Detects AI additive bias, test-logic tampering, and unnecessary complexity.
Usage
# Justify all changes on the current branch
/justify
# Justify only staged changes
/justify --scope staged
# Justify specific files
/justify src/auth.py tests/test_auth.pyWhat It Does
- Loads the justify methodology: Skill(imbue:justify)
- Gathers the change delta (git diff from base branch)
- Computes an additive bias score
- Checks Iron Law compliance (test logic tampering)
- Runs minimal intervention analysis per file
- Generates a justification report with risk assessment
When to Use
- After completing implementation, before committing
- Before creating a PR
- When scope-guard flags RED or YELLOW zone
- After any session where significant code was added
Before you install
- Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
- Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
- Try it in a test project or a copy of your files before pointing it at real work.
- Pin the version you tested, and review changes before updating.
- Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.
FAQ
What is Justify?
Justify is a slash command for Claude Code and Claude Cowork from the athola/claude-night-market repository on GitHub. Audit changes for additive bias, Iron Law compliance, and minimal intervention. Justifies every change against a "simplest safe change" standard.
How do I install Justify in Claude Code?
Download justify.md from the repository. Save it to ~/.claude/commands/ (all projects) or .claude/commands/ (one project). As a skill, you can instead save it as ~/.claude/skills/<name>/SKILL.md. Run it by typing / followed by its name.
Can I use Justify in Claude Cowork?
Turn the command into a skill: create a folder with the file saved as SKILL.md and zip it. In Customize → Skills, click +, then upload the ZIP. Run it from any task with / and the skill name.
Is Justify safe to install?
It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.
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