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 agentmods add skills/hypnguyen1209/offensive-claude/exploit-developmentnpx skills add hypnguyen1209/offensive-claude --skill exploit-developmentgit clone --depth 1 https://github.com/hypnguyen1209/offensive-claudeWrote 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/hypnguyen1209/offensive-claude/exploit-development)<a href="https://agentmods.dev/skills/hypnguyen1209/offensive-claude/exploit-development"><img src="https://agentmods.dev/badge/skills/hypnguyen1209/offensive-claude/exploit-development.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00061 | $0.02635 |
| Opus 5 | $0.00030 | $0.01318 |
| Sonnet 5 | $0.00012 | $0.00527 |
| Haiku 4.5 | $0.00006 | $0.00264 |
Grade A, and why
exploit-development 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 4d 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 — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Exploit Development
End-to-end weaponization: turn a confirmed bug class into a reliable, version-pinned PoC, then a primitive chain (leak -> R/W -> control flow), against current mitigations. Every cluster pairs the offensive path with detection telemetry and OPSEC.
When to Activate
- A confirmed vulnerability needs a working, reliable PoC (>=90% success target).
- Userland binary exploitation: stack overflow, heap (UAF/overflow/double-free), format string.
- Defeating modern mitigations: ASLR/PIE, NX/DEP, stack canaries, Full RELRO, CFG, Intel CET shadow stack, V8 Sandbox/pointer compression.
- Browser/JIT engine exploitation (V8 type confusion, addrof/fakeobj, WASM jump-table pivot).
- Local privilege escalation via Linux/Windows kernel memory corruption.
- Converting a crash into a stable read/write/execute primitive chain.
Technique Map
| Technique | ATT&CK | CWE | Reference | Script |
|---|---|---|---|---|
| Stack overflow -> ret2libc/ROP | T1203 | CWE-121 | references/stack-rop-mitigations.md | scripts/offset_finder.py |
| ret2csu / SROP / stack pivot | T1203 | CWE-121 | references/stack-rop-mitigations.md | scripts/rop_autochain.py |
| ret2dlresolve (leakless) | T1203 | CWE-121 | references/stack-rop-mitigations.md | scripts/rop_autochain.py |
| CET/CFG-aware control-flow hijack | T1203 | CWE-1419 | references/stack-rop-mitigations.md | scripts/rop_autochain.py |
| tcache/fastbin poisoning + safe-linking | T1203 | CWE-416 | references/heap-glibc-fsop.md | scripts/safe_linking.py |
| House of Botcake / Einherjar / Apple2 | T1203 | CWE-415 | references/heap-glibc-fsop.md | scripts/heap_fsop.py |
| FSOP (stdout leak, House of Apple 2) | T1203 | CWE-787 | references/heap-glibc-fsop.md | scripts/heap_fsop.py |
| Format string leak + arbitrary write | T1203 | CWE-134 | references/format-string-leaks.md | scripts/fmtstr_leak.py |
| V8 type confusion -> addrof/fakeobj | T1203 | CWE-843 | references/browser-jit-uaf.md | scripts/v8_primitives.js |
| V8 Sandbox escape (WASM jump table) | T1203 | CWE-843 | references/browser-jit-uaf.md | scripts/v8_primitives.js |
| UAF heap-spray reclaim | T1203 | CWE-416 | references/browser-jit-uaf.md | scripts/v8_primitives.js |
| Linux kernel UAF -> cross-cache | T1068 | CWE-416 | references/kernel-exploitation.md | scripts/kernel_lpe_skeleton.c |
| Dirty Pagetable / Pagedirectory | T1068 | CWE-416 | references/kernel-exploitation.md | scripts/kernel_lpe_skeleton.c |
| msg_msg infoleak / spray | T1068 | CWE-125 | references/kernel-exploitation.md | scripts/kernel_lpe_skeleton.c |
| Windows PreviousMode / I/O Ring R/W | T1068 | CWE-787 | references/kernel-exploitation.md | scripts/kernel_lpe_skeleton.c |
| Empirical mitigation matrix (build witness under N profiles) | T1203 | CWE-693 | references/exploit-feasibility.md | scripts/feasibility_profile.py |
| Cached context + blocked-technique gate for /exploit | T1203 | CWE-693 | references/exploit-feasibility.md | scripts/exploit_context.py |
What ships with it
15 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/browser-jit-uaf.md 8.3 KB
- references/exploit-feasibility.md 3.2 KB
- references/format-string-leaks.md 7.2 KB
- references/heap-glibc-fsop.md 9.3 KB
- references/kernel-exploitation.md 10 KB
- references/stack-rop-mitigations.md 9.7 KB
- scripts/exploit_context.py 10 KB runs code
- scripts/feasibility_profile.py 9.3 KB runs code
- scripts/fmtstr_leak.py 3.5 KB runs code
- scripts/heap_fsop.py 4.5 KB runs code
- scripts/kernel_lpe_skeleton.c 6.5 KB
- scripts/offset_finder.py 3.6 KB runs code
- scripts/rop_autochain.py 4.1 KB runs code
- scripts/safe_linking.py 2.5 KB runs code
- scripts/v8_primitives.js 4.7 KB runs code
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.
- 4d ago First seen · 127 lines · 61 tokens per session scan A d79bb8b322a9
exploit-development is a skill published in the GitHub repository hypnguyen1209/offensive-claude (354 stars, last pushed 18d ago), licensed MIT. It adds 61 tokens to every session and 2,635 once invoked, about $0.0003 per session on Opus 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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