zero-day-discovery

zero-day-discovery is a skill for Claude Code, Codex from Ed1s0nZ/CyberStrikeAI. It costs 64 tokens per session (753 once invoked), scanned A, original, Apache-2.0.

A security-research workflow for finding previously unknown software vulnerabilities and turning known vulnerability patches into testable exploits.

In plain words
What is it for?
Authorized vulnerability research using variant analysis, patch comparison, fuzzing, data-flow analysis, differential testing, and exploit validation.
Why use it?
It provides structured ways to investigate code, protocols, input handling, patches, and false positives when public vulnerability reports are insufficient.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Authorized vulnerability research using variant analysis, patch comparison, fuzzing, data-flow analysis, differential testing, and exploit validation.

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Install with agentmods
npx agentmods add skills/ed1s0nz/cyberstrikeai/zero-day-discovery
About the project

CyberStrikeAI is a security operations workspace that turns natural-language plans into governed, auditable actions while recording evidence and results for later reuse. Authorized security teams use it to manage agents, tools, vulnerabilities, knowledge, and attack-chain analysis. Catalogue add-ons provide agent and skill workflows for working with the platform.

Ed1s0nZ/CyberStrikeAI · 6,410 stars · on GitHub

Install

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.

Any agent
npx skills add Ed1s0nZ/CyberStrikeAI --skill zero-day-discovery
Clone the repo
git clone --depth 1 https://github.com/Ed1s0nZ/CyberStrikeAI

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for zero-day-discovery

README.md
[![agentmods](https://agentmods.dev/badge/skills/ed1s0nz/cyberstrikeai/zero-day-discovery/github.svg)](https://agentmods.dev/skills/ed1s0nz/cyberstrikeai/zero-day-discovery)
Your own site
<a href="https://agentmods.dev/skills/ed1s0nz/cyberstrikeai/zero-day-discovery"><img src="https://agentmods.dev/badge/skills/ed1s0nz/cyberstrikeai/zero-day-discovery/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.

agentmods 80×15 button for zero-day-discovery

Your own site · 80×15
<a href="https://agentmods.dev/skills/ed1s0nz/cyberstrikeai/zero-day-discovery"><img src="https://agentmods.dev/badge/skills/ed1s0nz/cyberstrikeai/zero-day-discovery.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 753 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00064 $0.00753
Opus 5 $0.00032 $0.00377
Sonnet 5 $0.00013 $0.00151
Haiku 4.5 $0.00006 $0.00075

Measured 11d ago against content hash 81e41579c6d4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

zero-day-discovery 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 11d 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.

skills/zero-day-discovery/SKILL.md · 31 lines

What it actually says

0day 自主发现引擎(全网搜不到漏洞时自己挖)

核心转变: 从"匹配已知漏洞库"→"理解代码/协议怎么工作,推断它哪里会坏"。0day不是运气,是方法。
五条主路:
  1.变体分析(最高产): 拿一个CVE补丁→提炼漏洞模式→全库grep同模式其它位置→补丁没覆盖的=0day
  2.补丁间隙: 读补丁过滤逻辑,黑名单几乎总能绕(漏了某种编码/等价函数/别名)→新CVE
  3.差分测试: 两组件对同一输入理解不一致(WAF vs 后端/校验器 vs 执行器)→走私/SSRF绕过
  4.Fuzzing: 写harness(包住处理不可信输入的函数)+造语料/字典+崩溃triage(可复现/可控/可利用性)
     AFL++/libFuzzer(覆盖率引导找内存破坏) boofuzz(协议) radamsa(黑盒) restler(REST API)
  5.污点推理(有源码最强): source(参数/Header/反序列化字段)无有效sanitizer到sink(exec/SQL/模板)=0day
     CodeQL写query自动求数据流可达 / Semgrep / Joern
N-day武器化(advisory出了但全网无PoC): 从补丁diff逆向重建exploit(bindiff/diaphora二进制对比,
  厂商regression test常就是PoC雏形)→本地试验场调通→打目标。漏洞窗口期最大化,红队最值钱能力之一。
猎人思维(看任何代码/端点/协议逐层逼问,每个"是"都是0day候选):
  信任边界:假设输入可信吗?什么情况不成立? | 状态时序:两步间状态能改吗(TOCTOU)?能打乱顺序吗?
  解析规范化:解析几次?normalize在校验前还是后? | 边界极值:负数/0/超大/类型混淆/编码/null字节?
  隐含能力:这功能"顺便"给了我什么? | 唯一性:ID/token可预测吗?"秘密"真是秘密吗?
把组件变"假设清单"逐个打破: 文件上传隐含假设"只传图片/扩展名可信/文件名不含路径/内容只是数据"→逐个打破=漏洞,组合=链。
0day验证(比CVE要求更高): 可复现(最小PoC)+根因清楚(哪行/哪个假设)+影响可证(实际读写执行)+排除误报。
Changes

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.

  1. 11d ago First seen · 31 lines · 64 tokens per session scan A 81e41579c6d4

Subscribe to this mod's changes

zero-day-discovery is a skill published in the GitHub repository Ed1s0nZ/CyberStrikeAI (6,410 stars, last pushed 15d ago), licensed Apache-2.0. It adds 64 tokens to every session and 753 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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