Is the Ac Checkpoint Manager skill free?

Yes. The skill itself is free from majiayu000/claude-skill-registry. SkillProof publishes the install command and an independent test verdict at no cost.

How do I install Ac Checkpoint Manager?

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 Ac Checkpoint Manager 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.

Ac Checkpoint Manager

Checkpoint/rollback skill whose referenced implementation script is missing and unrecoverable

by majiayu000 · majiayu000/claude-skill-registry

Tested · Didn't pass

Read why it failed Download source ↗

Test report

Verdict: Tested · Didn't pass
Tested: Jul 21, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 0e56675

Located skills/agent/ac-checkpoint-manager via the GitHub tree API and fetched SKILL.md + metadata.json raw. Frontmatter parses (name+description) with no security smells, but the body's Quick Start and API Reference both point to scripts/checkpoint_manager.py, which returns HTTP 404 in this registry AND in the upstream source adaptationio/Skrillz, whose repo itself returns 404. Only SKILL.md and metadata.json ship, so the CheckpointManager import cannot run and no artifact could be produced (outputMeasured=false). Trigger judgments were clean (5/5).

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

Installs cleanly 3/5
Triggers reliably 5/5
Output vs. baseline 3/10
Docs & honesty 2/5

What Ac Checkpoint Manager does

A documentation-only skill describing a Python CheckpointManager for creating save points and rolling back to known-good states during autonomous development. It triggers on requests to create checkpoints, roll back changes, manage recovery points, or restore previous states. The SKILL.md points to scripts/checkpoint_manager.py for the full implementation, but that file is absent from the package and from the now-deleted upstream repo, so the skill cannot function as documented.

How to install Ac Checkpoint Manager

git clone --depth 1 https://github.com/majiayu000/claude-skill-registry.git /tmp/ac-checkpoint-manager-src
mkdir -p ~/.claude/skills
cp -R /tmp/ac-checkpoint-manager-src/skills/agent/ac-checkpoint-manager ~/.claude/skills/ac-checkpoint-manager
# WARNING: broken skill. SKILL.md references scripts/checkpoint_manager.py which does NOT exist
# in this repo (404) nor upstream adaptationio/Skrillz (repo itself returns 404). Only SKILL.md
# + metadata.json ship. The Quick Start 'from scripts.checkpoint_manager import CheckpointManager'
# fails with ModuleNotFoundError. License: restricted (NOASSERTION).

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

Commands — how to trigger Ac Checkpoint Manager

/ac-checkpoint-manager Checkpoint/rollback skill whose referenced implementation script is missing and unrecoverable

It also activates on plain-language prompts like these:

Create a checkpoint before this risky change
Roll back to the last saved checkpoint
Restore the project to yesterday's checkpoint

Frequently asked questions

Is the Ac Checkpoint Manager skill free?: Yes. The skill itself is free from majiayu000/claude-skill-registry. SkillProof publishes the install command and an independent test verdict at no cost.
Does Ac Checkpoint Manager work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 21, 2026. Verdict: Tested · Didn't pass. Located skills/agent/ac-checkpoint-manager via the GitHub tree API and fetched SKILL.md + metadata.json raw. Frontmatter parses (name+description) with no security smells, but the body's Quick Start and API Reference both point to scripts/checkpoint_manager.py, which returns HTTP 404 in this registry AND in the upstream source adaptationio/Skrillz, whose repo itself returns 404. Only SKILL.md and metadata.json ship, so the CheckpointManager import cannot run and no artifact could be produced (outputMeasured=false). Trigger judgments were clean (5/5).
How do I install Ac Checkpoint Manager?: 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 Ac Checkpoint Manager 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.