A project-recovery guide that sets up two ways to undo changes: the /rewind command and Git checkpoints. Git is a system that saves project versions so you can return to an earlier state.

Use it to create your first Git checkpoint and learn the recovery steps for changes that break the project. It is intended for projects you are currently working on.

It reduces the risk of experimenting in a project. If a change causes problems, the cheat sheet shows the recovery action to use.

safety-net — Skill for Claude Code and Codex by duncan-buildroom

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.

Any agent

npx skills add duncan-buildroom/freeskills --skill safety-net

Clone the repo

git clone --depth 1 https://github.com/duncan-buildroom/freeskills

Made for: Claude Code, Codex.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/duncan-buildroom/freeskills/safety-net/github.svg)](https://agentmods.dev/skills/duncan-buildroom/freeskills/safety-net)

Your own site

<a href="https://agentmods.dev/skills/duncan-buildroom/freeskills/safety-net"><img src="https://agentmods.dev/badge/skills/duncan-buildroom/freeskills/safety-net/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/duncan-buildroom/freeskills/safety-net"><img src="https://agentmods.dev/badge/skills/duncan-buildroom/freeskills/safety-net.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 151 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,824 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00151	$0.01824
Opus 5.5	$0.00060	$0.00730
Sonnet 5.5	$0.00030	$0.00365
Haiku 4.5	$0.00015	$0.00182

Measured 2mo ago against content hash 792395eb6bda, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

safety-net 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 2mo 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.

safety-net/SKILL.md · 126 lines

The source is not reproduced here

No licence file

Read it on GitHub

Files

What ships with it

1 file beside SKILL.md 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.

README.md 1.4 KB

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.

2mo ago First seen · 126 lines · 151 tokens per session scan A 792395eb6bda

Subscribe to this mod's changes

safety-net is a skill published in the GitHub repository duncan-buildroom/freeskills (63 stars, last pushed 23d ago), with no licence file. It adds 151 tokens to every session and 1,824 once invoked, about $0.0006 per session on Opus 5.5. 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 2026-08-30.

Git and workflow Productivity

safety-net next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
safety-netduncan-buildroom/freeskills	Skill	63	23d ago	none	A	151	Claude Code, Codex
Dotfilesdanielmiessler/LifeOS	Skill	20k	yesterday	MIT	A	125	Claude Code, Codex
conventional-commitJanDeDobbeleer/oh-my-posh	Skill	24k	2d ago	MIT	A	26	Claude Code, Codex
python-releaseComposioHQ/composio	Skill	31k	yesterday	MIT	A	53	Claude Code, Codex
release-noteskenryu42/cc-safety-net	Skill	1.9k	yesterday	MIT	A	65	Claude Code, Codex
ratchet-filesdzhng/skills	Skill	1.4k	2d ago	MIT	A	118	Claude Code, Codex
git-guardrails-claude-codevinvcn/mattpocock-skills-zh-CN	Skill	5.6k	9d ago	MIT	B	68	Claude Code, Codex