Skylos
duriantaco/skylos
Run, interpret, or modify Skylos safely. An agent skill from duriantaco/skylos.
CTF/靶场 Flag 强制验证流程。当通过任何方式发现疑似 flag 字符串（含 flag{、FLAG{、ctf{ 等格式）时必须立即使用此 skill 验证，不要直接提交。防止因字符截断、编码错误、HTML 实体、base64 不完整解码、hex 截断等原因导致提交错误 flag。即使 flag 看起来完整，也可能存在隐藏字符或编码问题。覆盖 SQL…
Install Ctf Flag Verification
$ npx skills add wgpsec/AboutSecurity --skill ctf-flag-verification -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install wgpsec/AboutSecurity ctf-flag-verification --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/wgpsec/AboutSecurity.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/ctf/ctf-flag-verification .claude/skills/ctf-flag-verification && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "ctf-flag-verification" agent skill from https://github.com/wgpsec/AboutSecurity/tree/master/skills/ctf/ctf-flag-verification into .claude/skills/ctf-flag-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ctf-flag-verification", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/wgpsec/AboutSecurity/tree/master/skills/ctf/ctf-flag-verificationType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add wgpsec/AboutSecurity --skill ctf-flag-verification -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install wgpsec/AboutSecurity ctf-flag-verification --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/wgpsec/AboutSecurity.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/ctf/ctf-flag-verification .agents/skills/ctf-flag-verification && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "ctf-flag-verification" agent skill from https://github.com/wgpsec/AboutSecurity/tree/master/skills/ctf/ctf-flag-verification into .agents/skills/ctf-flag-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ctf-flag-verification", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add wgpsec/AboutSecurity --skill ctf-flag-verification -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install wgpsec/AboutSecurity ctf-flag-verification --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/wgpsec/AboutSecurity.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/ctf/ctf-flag-verification .cursor/skills/ctf-flag-verification && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "ctf-flag-verification" agent skill from https://github.com/wgpsec/AboutSecurity/tree/master/skills/ctf/ctf-flag-verification into .cursor/skills/ctf-flag-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ctf-flag-verification", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/wgpsec/AboutSecurity.git --path skills/ctf/ctf-flag-verification--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add wgpsec/AboutSecurity --skill ctf-flag-verification -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install wgpsec/AboutSecurity ctf-flag-verification --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/wgpsec/AboutSecurity.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/ctf/ctf-flag-verification .gemini/skills/ctf-flag-verification && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "ctf-flag-verification" agent skill from https://github.com/wgpsec/AboutSecurity/tree/master/skills/ctf/ctf-flag-verification into .gemini/skills/ctf-flag-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ctf-flag-verification", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install wgpsec/AboutSecurity ctf-flag-verificationInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add wgpsec/AboutSecurity --skill ctf-flag-verification -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/wgpsec/AboutSecurity.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/ctf/ctf-flag-verification .github/skills/ctf-flag-verification && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "ctf-flag-verification" agent skill from https://github.com/wgpsec/AboutSecurity/tree/master/skills/ctf/ctf-flag-verification into .github/skills/ctf-flag-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ctf-flag-verification", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add wgpsec/AboutSecurity --skill ctf-flag-verification -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install wgpsec/AboutSecurity ctf-flag-verification --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/wgpsec/AboutSecurity.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/ctf/ctf-flag-verification .opencode/skills/ctf-flag-verification && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "ctf-flag-verification" agent skill from https://github.com/wgpsec/AboutSecurity/tree/master/skills/ctf/ctf-flag-verification into .opencode/skills/ctf-flag-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ctf-flag-verification", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
ctf-flag-verification- GitHub stars
- 1.8k
- Token cost
- ~644 tokens
- SKILL.md length
- 194 words
- Files
- 3
- Skills in repo
- 64
- Repo updated
- First seen
- Licence
- None found
At a glance
CTF/靶场 Flag 强制验证流程。当通过任何方式发现疑似 flag 字符串（含 flag{、FLAG{、ctf{ 等格式）时必须立即使用此 skill 验证，不要直接提交。防止因字符截断、编码错误、HTML 实体、base64 不完整解码、hex 截断等原因导致提交错误 flag。即使 flag 看起来完整，也可能存在隐藏字符或编码问题。覆盖 SQL…
- Works in 3 steps: 长度不匹配 → 重新提取。EXTRACTVALUE 改用 Python… → 格式不对 → 检查 HTML 编码、base64 编码、trailing… → 多次失败 → 切换提取方法（EXTRACTVALUE → UNION → 盲注…
- Tasks that involve Capture the flag
- SKILL.md covers 核心原则 and 强制验证流程
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Ctf Flag Verification is an agent skill from wgpsec/AboutSecurity. CTF/靶场 Flag 强制验证流程。当通过任何方式发现疑似 flag 字符串（含 flag{、FLAG{、ctf{ 等格式）时必须立即使用此 skill 验证，不要直接提交。防止因字符截断、编码错误、HTML 实体、base64 不完整解码、hex 截断等原因导致提交错误 flag。即使 flag 看起来完整，也可能存在隐藏字符或编码问题。覆盖 SQL 注入分段提取、命令执行输出截断、文件读取编码、Web 页面解析等所有 flag 提取场景。任何时候看到 flag{ 字样都应触发此 skill
Its SKILL.md is about 640 tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files (for example `evals/evals.json` and `evals/recall.json`).
It sits in Security, covering Capture the flag. It works with SQL, Python and PHP. The repository describes itself as: Everything for pentest. | 渗透测试知识库，以 AI Agent 可执行的格式沉淀安全方法论。
When your agent uses it
- Tasks that involve Capture the flag
Example prompts
- “/ctf-flag-verification”
Requirements
- Python 3
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- 长度不匹配 → 重新提取。EXTRACTVALUE 改用 Python 自动脚本或 UNION SELECT
- 格式不对 → 检查 HTML 编码、base64 编码、trailing whitespace
- 多次失败 → 切换提取方法（EXTRACTVALUE → UNION → 盲注 → sqlmap --dump）
What it can do on your machine
Read from SKILL.md and the folder at commit db4573f. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are python).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Ctf Flag Verification loads about 644 tokens when it runs. Until then it costs about 70 tokens; SKILL.md has 194 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 194 words (~644 tokens).
“LLM 无法可靠地数 hex 字符或拼接长字符串。 所有 flag 的提取、拼接、验证必须用程序（Python）完成，绝不手动拼接。”
- name
- ctf-flag-verification
- metadata.tags
- ctf,flag,验证,capture the flag,靶场,flag验证,sqli,rce,lfi,file-read,提交,flag{,疑似flag,flag格式,flag截断,编码还原,hex,base64解码,字符截断,HTML实体,提取验证
- metadata.category
- ctf
Files
SKILL.md and 2 other files in skills/ctf/ctf-flag-verification of wgpsec/AboutSecurity.
- SKILL.md
- evals/evals.json
- evals/recall.json
Open the folder on GitHubat commit db4573f
Compare with similar skills
Ctf Flag Verification next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Ctf Flag Verification this skillwgpsec/AboutSecurity | 1.8k | — | ~644 | Automated safety check: Pass | None | |
| Skylosduriantaco/skylos | 843 | — | ~581 | Automated safety check: Pass | Apache-2.0 | |
| Secknowledge SkillPa55w0rd/secknowledge-skill | 423 | — | ~2.7k | Automated safety check: Pass | None | |
| Skylos Securityduriantaco/skylos | 843 | — | ~545 | Automated safety check: Pass | Apache-2.0 | |
| Php Audit Pipeline0xShe/PHP-Code-Audit-Skill | 402 | 1 repos | ~4.9k | Automated safety check: Pass | None | |
| Security WebshellsEyadkelleh/awesome-skills-security | 388 | — | ~636 | Automated safety check: Pass | None |
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Related
Categories
Questions about Ctf Flag Verification
What does Ctf Flag Verification do?
CTF/靶场 Flag 强制验证流程。当通过任何方式发现疑似 flag 字符串（含 flag{、FLAG{、ctf{ 等格式）时必须立即使用此 skill 验证，不要直接提交。防止因字符截断、编码错误、HTML 实体、base64 不完整解码、hex 截断等原因导致提交错误 flag。即使 flag 看起来完整，也可能存在隐藏字符或编码问题。覆盖 SQL…. Ctf Flag Verification is an agent skill from wgpsec/AboutSecurity.
When should I use Ctf Flag Verification?
Ctf Flag Verification fits situations like: tasks that involve Capture the flag.
How do I install Ctf Flag Verification in Claude Code?
Run `npx skills add wgpsec/AboutSecurity --skill ctf-flag-verification -a claude-code`. Or copy the skill folder (skills/ctf/ctf-flag-verification in wgpsec/AboutSecurity) into .claude/skills/ctf-flag-verification in your project. Claude Code loads it when a task matches its description.
How do I install Ctf Flag Verification in Codex?
Run `npx skills add wgpsec/AboutSecurity --skill ctf-flag-verification -a codex`. Or copy the skill folder (skills/ctf/ctf-flag-verification in wgpsec/AboutSecurity) into .agents/skills/ctf-flag-verification in your project. Codex loads it when a task matches its description.
Can I use Ctf Flag Verification in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add wgpsec/AboutSecurity --skill ctf-flag-verification -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/ctf-flag-verification, .gemini/skills/ctf-flag-verification, .github/skills/ctf-flag-verification and .opencode/skills/ctf-flag-verification in your project.
What does Ctf Flag Verification need to run?
SKILL.md names no scripts, command-line tools or credentials: Ctf Flag Verification is instructions for the agent only. Our summary lists: Python 3.
Does Ctf Flag Verification access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Ctf Flag Verification safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Ctf Flag Verification use?
No licence was found for Ctf Flag Verification or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Ctf Flag Verification use?
About 644 tokens (SKILL.md is roughly 2.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Ctf Flag Verification?
Skills that share tags, products or a category with Ctf Flag Verification: Skylos (duriantaco/skylos, 843 stars), Secknowledge Skill (Pa55w0rd/secknowledge-skill, 423 stars), Skylos Security (duriantaco/skylos, 843 stars) and Php Audit Pipeline (0xShe/PHP-Code-Audit-Skill, 402 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Ctf Flag Verification?
wgpsec (a GitHub organization) maintains it in wgpsec/AboutSecurity, which has 1,775 GitHub stars. The repository holds 64 skills in this directory. The repository was last updated on October 3, 2026.
Source: wgpsec/AboutSecurity on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.