Agent skill

Install the shredder in your agent.

The skill is a SKILL.md plus a local Python hasher. After install, you point the agent at a path. It hashes on disk, writes a certificate, and keeps the file out of the chat.

curl -fsSL https://noreadablecompany.xyz/install.sh | sh

The installer writes into agent folders it finds under your home directory, and into .agents/skills/shred if the current directory looks like a repo. PowerShell fetches install.ps1.

What it does

Hash a file you already have. Print digest, time, name, size. Tell you to delete the original. That is the whole job.

On disk scripts/shred.py streams the bytes. It never prints contents. openssl or certutil are fallbacks for the digest only.
Not in the chat It does not read the file into the chat or upload it. If you already pasted a secret, the history still holds it.
Slash command Agents that map skills to commands get /shred. Others pick it up from the description when you say shred, destroy, or hash for a certificate.
Same limit as the tab A digest is not proof that backups, swap, or other clones are gone. Delete the original yourself.

Drop the files yourself

If you do not want to pipe a script, copy the two files into the folder your agent already reads.

SKILL.md · scripts/shred.py

Any agent ~/.agents/skills/shred/ and, in a repo, .agents/skills/shred/
Claude Code ~/.claude/skills/shred/ or .claude/skills/shred/
Cursor ~/.cursor/skills/shred/ or .cursor/skills/shred/
Codex / Grok / Copilot / Gemini ~/.codex/skills, ~/.grok/skills, ~/.copilot/skills, ~/.gemini/skills. Same folder name: shred.

Project install without the script:

mkdir -p .agents/skills/shred/scripts
curl -fsSL https://noreadablecompany.xyz/skills/shred/SKILL.md -o .agents/skills/shred/SKILL.md
curl -fsSL https://noreadablecompany.xyz/skills/shred/scripts/shred.py -o .agents/skills/shred/scripts/shred.py

Prefer the browser?

Shred a file X