HackSkills is an organized knowledge base of installable skills that gives AI agents practical security knowledge across areas such as web security, privilege escalation, reverse engineering, and digital forensics. It is intended for bug bounty work, penetration testing, CTF competitions, and authorized security research. The catalogue entries are the project's own master, category, and topic skills.
Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/yaklang/hack-skillsnpx agentmods add skills/yaklang/hack-skills/insecure-source-code-managementWrote 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.
[](https://agentmods.dev/skills/yaklang/hack-skills/insecure-source-code-management)<a href="https://agentmods.dev/skills/yaklang/hack-skills/insecure-source-code-management"><img src="https://agentmods.dev/badge/skills/yaklang/hack-skills/insecure-source-code-management/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.
<a href="https://agentmods.dev/skills/yaklang/hack-skills/insecure-source-code-management"><img src="https://agentmods.dev/badge/skills/yaklang/hack-skills/insecure-source-code-management.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket warn
- Snyk warn
- NVIDIA SkillSpector warn
SkillSpector: 3 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Privilege Escalation · line 23 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- high Privilege Escalation · line 129 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- low Excessive Agency · line 9 Skill's behavior or capabilities extend beyond its stated purpose. Scope creep allows an agent to perform actions unrelated to its documented functionality, increasing the attack surface.Fix: Limit the skill's scope to its documented purpose. Remove instructions that enable the agent to perform actions outside its stated functionality.
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 | $0.00047 | $0.01441 |
| Opus 5.5 | $0.00019 | $0.00576 |
| Sonnet 5.5 | $0.00009 | $0.00288 |
| Haiku 4.5 | $0.00005 | $0.00144 |
Grade A, and why
insecure-source-code-management scanned grade A with 0 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 1mo 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
6 near-identical copies found in the catalogue:
- insecure-source-code-management — 100% identical, 0 lines differ
- insecure-source-code-management — 100% identical, 0 lines differ
- insecure-source-code-management — 100% identical, 0 lines differ
- insecure-source-code-management — 100% identical, 0 lines differ
- insecure-source-code-management — 100% identical, 0 lines differ
- insecure-source-code-management — 97% identical, 4 lines differ
How it starts
The opening of the file, as written. The whole thing — 162 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SKILL: Insecure Source Code Management
AI LOAD INSTRUCTION: This skill covers detection and recovery of exposed version-control metadata, common backup artifacts, and related misconfigurations. Use only in authorized assessments. Treat recovered credentials and URLs as sensitive; do not exfiltrate real data beyond scope. For broad discovery workflow, cross-load recon-for-sec and recon-and-methodology when those skills exist in the workspace.
0. QUICK START
High-value paths to probe first (GET or HEAD, respect rate limits):
/.git/HEAD
/.git/config
/.svn/entries
/.svn/wc.db
/.hg/requires
/.bzr/README
/.DS_Store
/.env
Routing note: quickly probe these paths first; for full recon workflow, load methodology from recon-for-sec and recon-and-methodology before deeper testing.
1. GIT EXPOSURE
Detection
/.git/HEAD— valid repo often returns plain text like:
ref: refs/heads/main
/.git/config— may exposeremote.origin.url, user identity, or embedded credentials./.git/index,/.git/objects/— partial object store access enables reconstruction with the right tools.
403 vs 404
404— path likely absent or fully blocked at the edge.403on/.git/— directory may exist but listing is denied; still try direct file URLs:
/.git/HEAD
/.git/config
/.git/logs/HEAD
/.git/refs/heads/main
A 403 on the directory plus 200 on HEAD strongly indicates exposure.
Recovery tools (open source)
arthaud/git-dumper— dumps reachable.gittree when individual files are fetchable.internetwache/GitTools— Dumper, Extractor, Finder modules for partial/corrupt dumps.WangYihang/GitHacker— alternative recovery when standard dumpers miss edge cases.
Key files to prioritize
| Path | Why it matters |
|---|---|
.git/config |
Remotes, credentials, hooks paths |
.git/logs/HEAD |
Commit history, reflog-style leakage |
.git/refs/heads/* |
Branch tips, commit SHAs |
.git/packed-refs |
Packed branch/tag refs |
.git/objects/** |
Object blobs for reconstruction |
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.
- 1mo ago First seen · 162 lines · 47 tokens per session scan A 7e033f796ec8
insecure-source-code-management is a skill published in the GitHub repository yaklang/hack-skills (2,521 stars, last pushed 1mo ago), licensed MIT. It adds 47 tokens to every session and 1,441 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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