What is safe-encryption?

A command-line tool for encrypting and decrypting files or text, while managing the keys used to protect them. It is presented as an alternative to GPG and supports post-quantum encryption, multiple recipients, and authentication.

Use it to encrypt or decrypt data from the shell, manage encryption identities and recipients, and automate protected data handling.

It helps keep sensitive data private and provides guidance for choosing existing keys, creating new ones, and handling passwords in scripts.

How tan-yong-sheng/ai-vision-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to tan-yong-sheng/ai-vision-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/tan-yong-sheng/ai-vision-mcp/main/.claude/skills/safe-encryption/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/tan-yong-sheng/ai-vision-mcp

Made for: Claude Code.

Or install ai-vision-mcp, the plugin that ships this one along with the rest of its 29 skills, 1 plugin.

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/tan-yong-sheng/ai-vision-mcp/safe-encryption/github.svg)](https://agentmods.dev/skills/tan-yong-sheng/ai-vision-mcp/safe-encryption)

Your own site

<a href="https://agentmods.dev/skills/tan-yong-sheng/ai-vision-mcp/safe-encryption"><img src="https://agentmods.dev/badge/skills/tan-yong-sheng/ai-vision-mcp/safe-encryption/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/tan-yong-sheng/ai-vision-mcp/safe-encryption"><img src="https://agentmods.dev/badge/skills/tan-yong-sheng/ai-vision-mcp/safe-encryption.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 14,793 The whole file, excluding the scripts and references it only reads on demand.

Security scan D 3 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original 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	$0.00028	$0.14793
Opus 5	$0.00014	$0.07397
Sonnet 5	$0.00006	$0.02959
Haiku 4.5	$0.00003	$0.01479

Measured 11d ago against content hash db510f4b35c2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade D, and why

safe-encryption scanned grade D with 3 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 11d 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

curl -sL https://thesafe.dev/downloads/safe-darwin-arm64 -o safe && chmod +x safe && sudo mv safe /usr/local/bin/

Reaches for credential fileshighPrivilege escalation

SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.

safe: using SSH key ~/.ssh/id_ed25519

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -sL https://thesafe.dev/downloads/safe-darwin-arm64 -o safe && chmod +x safe && sudo mv safe /usr/local/bin/

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

safe-encryption — 100% identical, 3,101 lines differ

.claude/skills/safe-encryption/SKILL.md · 1,551 lines

How it starts

The opening of the file, as written. The whole thing — 1,551 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SAFE Encryption Tool

SAFE is a modern encryption CLI with post-quantum support, multi-recipient encryption, and composable authentication.

Behavior Guidelines

When this skill is loaded:

Check if safe is installed (which safe). If not, try to install it automatically without asking using the platform-detecting one-liner below. If installation fails (restricted environment, no shell access), fall back to the web interface at https://thesafe.dev — see "Browser-Based Alternative" below.
When the user asks to encrypt/decrypt, just do it. Don't ask for confirmation.
If a password is needed and not provided, use -p without a value (prompts interactively or reads SAFE_PASSPHRASE env var). In automation, use -p env:VARNAME to read from environment variables.
If a key file is needed, run safe keys to check existing identities and recipients. If no key exists, run safe keygen x25519 to generate one (auto-stores to ~/.safe/).
Always use absolute paths for key files and encrypted files to avoid working directory issues.
Always pipe instead of writing temp files. When decrypting inline/embedded content (base64, pasted data), pipe directly: echo "..." | base64 -d | safe decrypt -k key.key. Never write intermediate .safe files to /tmp or elsewhere.
Bare name recipients work. Use -r alice instead of -r /full/path/to/alice.x25519.pub when the recipient is in ~/.safe/recipients/.
Decrypt auto-discovers keys. If no -k or -p is provided, safe decrypt automatically tries all keys in ~/.safe/keys/.

Installation

Download the prebuilt binary from thesafe.dev/download:

macOS Apple Silicon:

curl -sL https://thesafe.dev/downloads/safe-darwin-arm64 -o safe && chmod +x safe && sudo mv safe /usr/local/bin/

macOS Intel:

curl -sL https://thesafe.dev/downloads/safe-darwin-amd64 -o safe && chmod +x safe && sudo mv safe /usr/local/bin/

Read the full file on GitHub · 1,551 lines

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.

11d ago First seen · 1,551 lines · 28 tokens per session scan D db510f4b35c2

Subscribe to this mod's changes

safe-encryption is a skill published in the GitHub repository tan-yong-sheng/ai-vision-mcp (78 stars, last pushed 5mo ago), licensed MIT. It adds 28 tokens to every session and 14,793 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it D with 3 findings (asks for root, reaches for credential files, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Security

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ai-vision-mcp: Skill for Claude Code