Security - Secret Detection

Persona

Read .claude/roles/code-reviewer.md — adopt this profile and follow all its rules.

Activation

This skill activates:

• Before a git commit or git push
• On explicit request (/security)
• Via the CLI command flux security-scan (full repo scan)

Detected Patterns

Tokens & API Keys

Pattern	Example	Regex
GitLab PAT	glpat-xxxx	glpat-[a-zA-Z0-9_-]{20,}
GitHub PAT	ghp_xxxx	gh[ps]_[a-zA-Z0-9]{36,}
GitHub OAuth	gho_xxxx	gho_[a-zA-Z0-9]{36,}
OpenAI	sk-xxxx	sk-[a-zA-Z0-9]{32,}
Anthropic	sk-ant-xxxx	sk-ant-[a-zA-Z0-9-]{32,}
AWS Access Key	AKIA...	AKIA[0-9A-Z]{16}
AWS Secret	-	[a-zA-Z0-9/+=]{40} (AWS context)
Slack Token	xox[baprs]-	xox[baprs]-[a-zA-Z0-9-]+
Discord Token	-	[MN][a-zA-Z0-9]{23,}\.[a-zA-Z0-9-_]{6}\.[a-zA-Z0-9-_]{27}

Generic Credentials

Pattern	Context
password\s*=\s*["'][^"']+["']	Hardcoded passwords
secret\s*=\s*["'][^"']+["']	Hardcoded secrets
token\s*=\s*["'][^"']+["']	Hardcoded tokens
api[_-]?key\s*=\s*["'][^"']+["']	Hardcoded API keys
Bearer [a-zA-Z0-9_-]+\.[a-zA-Z0-9_-]+\.[a-zA-Z0-9_-]+	JWT tokens

Suspicious Files

File	Risk
.env	Environment variables (often secrets)
*.pem, *.key	Private keys
secrets.*, credentials.*	Secret files
config.toml with [secrets] section	Config with embedded secrets
id_rsa, id_ed25519	Private SSH keys

Workflow

Pre-commit scan (git diff --staged)

SECURITY - Pre-commit Scan

Analyzing staged diff...

Result:
- Files scanned: X
- Secrets detected: Y

[If secrets found]
WARNING: Secrets detected!

File: src/config.ts
Line 42: token = "glpat-..." (GitLab PAT)

Action: Fix before committing.
Suggestions:
- Use an environment variable
- Move to a secure configuration file

Full repo scan (flux security-scan)

SECURITY - Full Scan

Scanning entire repository...

Result:
- Files scanned: X
- Files ignored (.gitignore): Y
- Secrets detected: Z

[List of files with secrets]

Commands

Git diff staged

git diff --cached --name-only  # List of staged files
git diff --cached              # Diff content

Scan patterns

# Example with grep (the skill uses more advanced tools)
git diff --cached | grep -E "(glpat-|ghp_|sk-|password\s*=)"

False Positives

Ignore if:

• In a test file with dummy values (test_token, fake_key)
• In documentation (examples with xxxx or your-token-here)
• Pattern in a comment explaining the expected format

CLAUDE.md Integration

This skill applies the security rule:

Absolute rule: Never store tokens, API keys, or secrets in plain text in code or versioned files.

Report

The scan produces a report with:

1. Overall status (OK / WARNING)
2. Number of files scanned
3. List of detected secrets (file, line, type)
4. Correction suggestions