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ryanmacleanryanmaclean/skills/redact/SKILL.md

redact

Skill1 starsChanged 50 days agoMITView on GitHub

Use when printing, logging, or verifying any credential, API key, token, or secret — pipe through redact to show only first/last 4 chars (e.g. fc1d...4439) instead of the full value

  • Reads credentials

4 other projects use a version of this.

Adopted by

Most recently taken up by

The file

We split this skill into the rules it gives an agent

1 rule. 0 are common, 1 is distinctive, and 0 are very specific to this project.

  • 0

    Common

    Most of the 4 edited versions we read keep these.

  • 1

    Distinctive

    This author's own choices. Worth a look.

  • 0

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Always: when you need to reference or verify a secret:

    line 27

“Common” is measured: kept by at least 6 in 10 of the 4 edited versions of this file we could read. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

redact

Pipe-based secret masking. Shows first 4 + last 4 chars for identification without exposing the full value.

Usage

# Pipe any output containing secrets
echo $GITEA_API_KEY | redact                  # → fc1d...4439
curl -s http://host/api | redact              # masks tokens in JSON
some-command 2>&1 | redact                    # masks in logs

# Direct arg
redact $SOME_TOKEN                            # → abcd...wxyz

# Custom reveal length
echo $TOKEN | redact --head 6 --tail 6        # → fc1df7...345360

When to Use

Always when you need to reference or verify a secret:

# ❌ NEVER
echo "Token: $GITEA_API_KEY"
TOKEN="abc123..."
echo $TOKEN

# ✅ ALWAYS
echo $GITEA_API_KEY | redact
echo "Token: $(echo $GITEA_API_KEY | redact)"

Auto-Detected Patterns

  • 40-char hex strings (Gitea, SHA-like)
  • ghp_ / ghs_ GitHub tokens
  • glpat- GitLab tokens
  • Authorization: bearer/token <value> headers
  • api_key=, auth_token=, password=, secret=, token= key-value pairs

Installation

Script lives at ~/.local/bin/redact (Python 3, no dependencies). Available on all hosts where ~/.local/bin is in PATH.

Fleet Distribution

ansible pis:nas:workstations -i ansible/inventory -m copy \
  -a "src=~/.local/bin/redact dest=~/.local/bin/redact mode=0755"

Download now (ZIP)

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