Is the Anti Entropy Governance skill free?

Yes. The skill itself is free from GanyuanRan/Aegis. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Anti Entropy Governance SkillProof Score?

9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.

How do I install Anti Entropy Governance?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Anti Entropy Governance with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Anti Entropy Governance

Picks delete-vs-retain when retiring old code, and hard-stops before irreversible data deletion

by GanyuanRan · GanyuanRan/Aegis

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.2/10
Tested: Jul 21, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 127eba0

⚠ The author changed this skill after we tested it. The verdict below describes the version we ran on Jul 21, 2026; it's queued for a re-test.

Fetched the raw SKILL.md (HTTP 200) and confirmed it references no external scripts/files (only sibling skill names), so nothing to break; installed cleanly into a temp HOME. Ran one representative task mixing an internal keyword-fallback retirement with a stale users.legacy_locales column drop. Baseline artifact treated both as one cleanup and offered to run ALTER TABLE users DROP COLUMN legacy_locales, verifying only via "tests green"; the skill-followed artifact classified the column as persistent-state, emitted the Data Destruction Guard, refused to run the DROP as the next action, demanded environment+backup+reader-check+scoped confirmation, and separately proceeded with delete-first on the code plus a real negative/lingering-reference verification plan. Artifacts at scratchpad/baseline_artifact.md and scratchpad/skill_artifact.md. No security smells; the skill is itself anti-destructive.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 8/10
Docs & honesty 5/5

What Anti Entropy Governance does

A governance skill for code-retirement tasks: it classifies each deletion target (internal code vs schema/contract vs persistent live data) and picks delete-first, compat-exception, or confirmation-first accordingly. Triggers when you retire old logic, collapse duplicate owners, remove fallbacks, or touch schema, persistence, or source-of-truth boundaries, and it blocks irreversible data deletion (DROP TABLE/COLUMN, TRUNCATE, bulk deletes) until you give explicit scoped confirmation.

How to install Anti Entropy Governance

git clone --depth 1 https://github.com/GanyuanRan/Aegis.git /tmp/anti-entropy-governance-src
mkdir -p ~/.claude/skills
cp -R /tmp/anti-entropy-governance-src/skills/anti-entropy-governance ~/.claude/skills/anti-entropy-governance
# Single-file skill (SKILL.md only), no scripts/deps. MIT licensed.
# Part of the larger "aegis" plugin but the skill dir is self-contained and works standalone.
# Designed to be composed by other Aegis skills (brainstorming/writing-plans/systematic-debugging/verification-before-completion); also works on its own.

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Anti Entropy Governance

/anti-entropy-governance Picks delete-vs-retain when retiring old code, and hard-stops before irreversible data deletion

It also activates on plain-language prompts like these:

Should I delete this deprecated fallback path
Review whether it's safe to remove this old logic
Check if this schema change breaks source-of-truth boundaries

Frequently asked questions

Is the Anti Entropy Governance skill free?: Yes. The skill itself is free from GanyuanRan/Aegis. SkillProof publishes the install command and an independent test verdict at no cost.
Does Anti Entropy Governance work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 21, 2026. Verdict: Tested · Works. Fetched the raw SKILL.md (HTTP 200) and confirmed it references no external scripts/files (only sibling skill names), so nothing to break; installed cleanly into a temp HOME. Ran one representative task mixing an internal keyword-fallback retirement with a stale users.legacy_locales column drop. Baseline artifact treated both as one cleanup and offered to run ALTER TABLE users DROP COLUMN legacy_locales, verifying only via "tests green"; the skill-followed artifact classified the column as persistent-state, emitted the Data Destruction Guard, refused to run the DROP as the next action, demanded environment+backup+reader-check+scoped confirmation, and separately proceeded with delete-first on the code plus a real negative/lingering-reference verification plan. Artifacts at scratchpad/baseline_artifact.md and scratchpad/skill_artifact.md. No security smells; the skill is itself anti-destructive.
What is the Anti Entropy Governance SkillProof Score?: 9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.
How do I install Anti Entropy Governance?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Anti Entropy Governance with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.