claude-red is a library of structured skills that give Claude specialized offensive-security methods for areas such as web vulnerabilities, shellcode, exploit development, and identity systems. It is intended for authorized red-team work, bug-bounty triage, security research, CTF preparation, and operator training. Its catalogue contains the project's skills for loading these security specializations into Claude.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add SnailSploit/Claude-Red --skill offensive-mitigationsgit clone --depth 1 https://github.com/SnailSploit/Claude-RedWrote 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/snailsploit/claude-red/offensive-mitigations)<a href="https://agentmods.dev/skills/snailsploit/claude-red/offensive-mitigations"><img src="https://agentmods.dev/badge/skills/snailsploit/claude-red/offensive-mitigations/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/snailsploit/claude-red/offensive-mitigations"><img src="https://agentmods.dev/badge/skills/snailsploit/claude-red/offensive-mitigations.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, 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 1086 Potential security issue detected. Manual review is recommended.Fix: Review the flagged content for security risks. Ensure no credentials, secrets, or sensitive data are exposed.
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 | $0.00000 | $0.13528 |
| Opus 5.5 | $0.00000 | $0.05411 |
| Sonnet 5.5 | $0.00000 | $0.02706 |
| Haiku 4.5 | $0.00000 | $0.01353 |
Grade A, and why
offensive-mitigations 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.
How it starts
The opening of the file, as written. The whole thing — 1,350 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SKILL: Modern Kernel Exploit Mitigations
Metadata
- Skill Name: security-mitigations
- Folder: offensive-mitigations
- Source: https://github.com/SnailSploit/offensive-checklist/blob/main/mitigations.md
Description
Security mitigation reference and bypass catalog: ASLR, DEP/NX, RELRO, stack canaries, CFI, sandboxing, seccomp. Covers both detection of enabled mitigations and known bypass techniques. Use when assessing target hardening or planning exploit mitigation bypasses.
Trigger Phrases
Use this skill when the conversation involves any of:
mitigations, ASLR bypass, DEP bypass, NX bypass, RELRO, stack canary bypass, CFI bypass, sandbox bypass, seccomp bypass, mitigation detection, checksec
Instructions for Claude
When this skill is active:
- Load and apply the full methodology below as your operational checklist
- Follow steps in order unless the user specifies otherwise
- For each technique, consider applicability to the current target/context
- Track which checklist items have been completed
- Suggest next steps based on findings
Full Methodology
Modern Kernel Exploit Mitigations
Memory-safety & Isolation
Kernel Address Space Layout Randomization (KASLR)
- Randomizes memory addresses where the kernel and its components are loaded.
- Makes it difficult for attackers to predict kernel code and data locations.
Bypass Techniques
- Information Leaks: Exploiting vulnerabilities (e.g., uninitialized memory, side-channels) to leak kernel pointers and calculate the base address.
- Side-Channel Attacks: Using timing, cache, or other microarchitectural side channels to infer memory layout.
- Prefetch Cache Timing: Measures access speed across the kASLR range (0xfffff80000000000 to 0xfffff80800000000, ~0x8000 iterations with 0x100000 alignment). The fastest access indicates a cached address, revealing the actual kernel base. Uses
rdtscpfor timing,mfencefor memory barriers, andprefetchnta/prefetcht2for cache manipulation.
- Prefetch Cache Timing: Measures access speed across the kASLR range (0xfffff80000000000 to 0xfffff80800000000, ~0x8000 iterations with 0x100000 alignment). The fastest access indicates a cached address, revealing the actual kernel base. Uses
- Targeting Non-Randomized Regions: Exploiting data or code segments that are not fully randomized.
- Brute-Force: Feasible in environments with limited entropy (e.g., some 32-bit systems or specific configurations).
- Intel LAM: Linear Address Masking support exists on recent kernels/CPUs but may be disabled by default. Verify with kernel config, boot params, and CPU flags on your target.
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 · 1,350 lines · 0 tokens per session scan A cbd789c1bf8f
offensive-mitigations is a skill published in the GitHub repository SnailSploit/Claude-Red (7,620 stars, last pushed 8d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 13,528 tokens. 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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