secret-leak-check

Original：🇺🇸 English

Translated

Use this skill to detect potential secret and privacy leaks in changed files, staged diffs, commit messages, and git identity settings before code is shared or merged.

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Sourcezenless-lab/skills

Added on2026-03-15

NPX Install

npx skill4agent add zenless-lab/skills secret-leak-check

SKILL.md Content

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Secret & Privacy Leak Check Skill

Use this skill when reviewing repository changes for accidental exposure of sensitive data.

Skill Overview

This skill helps you detect:

Traditional secrets (tokens, API keys, credentials, connection strings).
Sensitive architecture details (database schema/internal topology details that should not be public).
Privacy data (personal email addresses, phone numbers, real names).
Leakage risks in commit messages.
Git identity/privacy misconfiguration in open-source contexts.

Core Principles

Scope first, then rules: Determine scan scope before running pattern checks.
Diff-first by default: Prioritize review of newly introduced risk.
Context-aware checks: Apply open-source/GitHub-specific checks only when conditions match.
Actionable results only: Report findings with severity, location, and remediation guidance.

Workflow

Step 1: Determine Scan Scope

Use references/scope_selection.md.

Default behavior when user gives no explicit scope:

Scan staged changes first (index vs
```
HEAD
```
, e.g.,
```
git diff --cached
```
).
Then scan unstaged working tree changes (working tree vs index, e.g.,
```
git diff
```
).
If no staged changes exist, scan all modified and untracked files in the working tree.

If user explicitly asks to scan all commits in a PR, expand scope to:

Current staged diff (index vs
```
HEAD
```
, if any).
Current unstaged/untracked working tree changes (working tree vs index, if any).
Every commit in the PR range, scanned commit-by-commit for leak content in diffs and commit messages.

If user explicitly asks to scan all files, ignore diff-only logic and scan the entire requested range. After scope is determined, build the concrete target file list. Do not report "full scan complete" unless all in-scope files satisfy both conditions.

If any files are excluded, list them explicitly with reason.

Step 2: Apply Detection Rules by Data Category

Use references/detection_rules.md.

Run category-specific checks for:

Secret tokens and API keys.
Credential-like material and high-risk config values.
Database schema/internal structure leakage.
PII and privacy data (email, phone, real name).

Step 3: Run Scenario-Specific Checks

Load only relevant references:

Diff/staging behavior: references/scenario_diff_and_staging.md
Full-repo/range behavior: references/scenario_full_scan.md
Commit message review: references/scenario_commit_messages.md

If the user does not explicitly disable it, also check commit messages in the active scan range. If user explicitly asks to scan all commits in a PR, commit message checks must cover each commit in that PR range.

Step 4: Validate Git Identity Privacy (Conditional)

Use references/scenario_git_identity_privacy.md.

Rules:

Only for open-source project scenario: check whether git config email may expose personal email.
Only when the remote is GitHub: check whether a GitHub privacy email (
```
<id>+<username>@users.noreply.github.com
```
) is used when privacy is desired.

Step 5: Report Findings

Use references/reporting_template.md.

For each finding include:

Severity (
```
critical
```
/
```
high
```
/
```
medium
```
/
```
low
```
)
Category (
```
secret
```
/
```
privacy
```
/
```
metadata
```
)
Location (file path, diff hunk, or commit hash/message)
Why it is risky
Concrete remediation

Response Template

Scan Scope: [staged diff / working-tree-vs-HEAD / changed files / full scan / pr-all-commits]

Context Checks:

Open-source scenario: [yes/no]

GitHub remote detected: [yes/no]

Findings Summary:

Critical: [count]

High: [count]

Medium: [count]

Low: [count]

Findings:

[severity] [category] [location] — [risk] — [recommended fix]

Commit Message Review:

[result for checked commit range]

Git Identity Privacy Check:

[result and recommendation]