Better Auth Best Practices
latitude-dev/latitude-llm
Configure Better Auth server and client, set up database adapters, manage sessions, add plugins, and handle environment variables.
Enforce universal security protocols for safe, resilient software.
Install Common Security Standards
$ npx skills add HoangNguyen0403/agent-skills-standard --skill common-security-standards -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard common-security-standards --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/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/common/common-security-standards .claude/skills/common-security-standards && 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 "common-security-standards" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/common/common-security-standards into .claude/skills/common-security-standards/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "common-security-standards", 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/HoangNguyen0403/agent-skills-standard/tree/develop/skills/common/common-security-standardsType 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 HoangNguyen0403/agent-skills-standard --skill common-security-standards -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard common-security-standards --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/common/common-security-standards .agents/skills/common-security-standards && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "common-security-standards" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/common/common-security-standards into .agents/skills/common-security-standards/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "common-security-standards", 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 HoangNguyen0403/agent-skills-standard --skill common-security-standards -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard common-security-standards --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/common/common-security-standards .cursor/skills/common-security-standards && 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 "common-security-standards" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/common/common-security-standards into .cursor/skills/common-security-standards/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "common-security-standards", 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/HoangNguyen0403/agent-skills-standard.git --path skills/common/common-security-standards--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 HoangNguyen0403/agent-skills-standard --skill common-security-standards -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard common-security-standards --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/common/common-security-standards .gemini/skills/common-security-standards && 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 "common-security-standards" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/common/common-security-standards into .gemini/skills/common-security-standards/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "common-security-standards", 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 HoangNguyen0403/agent-skills-standard common-security-standardsInstalls 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 HoangNguyen0403/agent-skills-standard --skill common-security-standards -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/common/common-security-standards .github/skills/common-security-standards && 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 "common-security-standards" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/common/common-security-standards into .github/skills/common-security-standards/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "common-security-standards", 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 HoangNguyen0403/agent-skills-standard --skill common-security-standards -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard common-security-standards --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/common/common-security-standards .opencode/skills/common-security-standards && 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 "common-security-standards" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/common/common-security-standards into .opencode/skills/common-security-standards/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "common-security-standards", 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
common-security-standards- GitHub stars
- 572
- Token cost
- ~764 tokens
- SKILL.md length
- 296 words
- Files
- 5 (incl. references)
- Skills in repo
- 211
- Repo updated
- First seen
- Licence
- MIT
At a glance
Enforce universal security protocols for safe, resilient software.
- Works in 4 steps: Identify trust boundaries — map every… → Validate and sanitize all external input… → Apply least privilege to users,… → …
- Implementing authentication
- SKILL.md covers Priority: P0 (CRITICAL), Always-Apply Rules, Workflow and Context-Specific Rules, plus 3 more sections
- Calls npm and pip
What it does
Common Security Standards is an agent skill from HoangNguyen0403/agent-skills-standard. Enforce universal security protocols for safe, resilient software. Use when implementing authentication, encryption, authorization, input validation, secret management, or any security-sensitive feature across any language or framework.
Its SKILL.md is about 760 tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including reference files (for example `evals/evals.json`, `references/INJECTION_TESTING.md` and `references/VULNERABILITY_REMEDIATION.md`).
It sits in Backend & APIs, covering Secrets management and Authentication. The repository describes itself as: A collection of Agent Skills Standard and Best Practice for Programming Languages, Frameworks that help our AI Agent follow best practies on frameworks and programming laguages. The licence is MIT.
When your agent uses it
- Implementing authentication
- Input validation
- Secret management
- Any security-sensitive feature across any language
Example prompts
- “/common-security-standards”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Identify trust boundaries — map every data entry point (API, UI, CSV, webhook).
- Validate and sanitize all external input at each boundary.
- Apply least privilege to users, services, and containers.
- Verify with SAST/DAST scanners in CI before merge.
What it can do on your machine
Read from SKILL.md and the folder at commit b529c2d. 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
Shell commands in SKILL.md call:
npmpip
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use npm and pip, which can reach the network depending on how they are called.
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
Common Security Standards loads about 764 tokens when it runs, and up to ~1.4k if it reads all its reference files. Until then it costs about 66 tokens; SKILL.md has 296 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
The full file from HoangNguyen0403/agent-skills-standard at commit b529c2d, republished under its MIT licence (© HoangNguyen0403). 296 words, ~764 tokens.
Download SKILL.mdSave it as
.claude/skills/common-security-standards/SKILL.md (or your agent's skills folder). This skill also uses 4 other files; get the full folder from GitHub.- name
- common-security-standards
- description
- Enforce universal security protocols for safe, resilient software. Use when implementing authentication, encryption, authorization, input validation, secret management, or any security-sensitive feature across any language or framework.
Security Standards
Priority: P0 (CRITICAL)
Always-Apply Rules
Apply these on every code write, regardless of context:
- No hardcoded secrets: Use environment variables or secret managers. Never commit keys, passwords, or tokens to source control.
- No raw SQL strings: Use parameterized queries or ORMs —
WHERE id = ${userId}always wrong. - No stacktraces in prod: Return generic error codes; log full detail server-side only.
Workflow
Activate when: implementing auth, encryption, authorization, input handling, or any security-sensitive feature.
- Identify trust boundaries — map every data entry point (API, UI, CSV, webhook).
- Validate and sanitize all external input at each boundary.
- Apply least privilege to users, services, and containers.
- Verify with SAST/DAST scanners in CI before merge.
Context-Specific Rules
Data Safeguarding
- Zero Trust: Never trust external input. Sanitize and validate every data boundary.
- Least Privilege: Grant minimum necessary permissions to users, services, and containers.
- Encryption: AES-256 for data-at-rest; TLS 1.3 for data-in-transit.
- PII Logging: Never log PII (email, phone, names). Mask sensitive fields before logging.
See implementation examples for parameterized queries and secret management.
Secure Coding
- Injection Prevention: Use parameterized queries or ORMs to stop SQL, Command, and XSS injections.
- Dependency Management: Regularly scan (
npm audit,pip audit) and update third-party libraries to patch CVEs. - Secure Auth: Implement Multi-Factor Authentication (MFA) and secure session management.
- Error Privacy: Never leak stack traces or internal implementation details to end-user.
Continuous Security
- Shift Left: Integrate security scanners (SAST/DAST) early in CI/CD pipeline.
- Data Minimization: Collect and store only minimum data required for business logic.
- Audit Logging: Maintain logs for sensitive operations (Auth, Deletion, Admin changes).
Anti-Patterns
- No default passwords: Force rotation on first use with strong entropy requirements.
References
Remediation anchors
- Remediation anchors: Argon2id, parameterized queries or ORM, rate limiting, HttpOnly Secure cookies
© HoangNguyen0403, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 4 other files (references) in skills/common/common-security-standards of HoangNguyen0403/agent-skills-standard.
- SKILL.md
- evals/evals.json
- references/INJECTION_TESTING.md
- references/VULNERABILITY_REMEDIATION.md
- references/implementation.md
Open the folder on GitHubat commit b529c2d
Compare with similar skills
Common Security Standards 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 |
|---|---|---|---|---|---|---|
| Common Security Standards this skillHoangNguyen0403/agent-skills-standard | 572 | — | ~764 | Automated safety check: Pass | MIT | |
| Better Auth Best Practiceslatitude-dev/latitude-llm | 4.7k | 7 repos | ~1.6k | Automated safety check: Pass | MIT | |
| Debugsbusso/claudeclaw | 194 | 1 repos | ~3.3k | Automated safety check: Notes | MIT | |
| API Security Designvinayaklatthe/microsoft-security-skills | 175 | — | ~2.2k | Automated safety check: Pass | MIT | |
| JS Secrets Extractionuphiago/recon-skills | 1.3k | — | ~2.6k | Automated safety check: Pass | MIT | |
| Scanning For Hardcoded Secretsjeremylongshore/tons-of-skills-marketplace | 2.8k | — | ~2.1k | Automated safety check: Notes | MIT |
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Categories
Questions about Common Security Standards
What does Common Security Standards do?
Enforce universal security protocols for safe, resilient software. Common Security Standards is an agent skill from HoangNguyen0403/agent-skills-standard. Enforce universal security protocols for safe, resilient software.
When should I use Common Security Standards?
Common Security Standards fits situations like: implementing authentication; input validation; secret management; any security-sensitive feature across any language.
How do I install Common Security Standards in Claude Code?
Run `npx skills add HoangNguyen0403/agent-skills-standard --skill common-security-standards -a claude-code`. Or copy the skill folder (skills/common/common-security-standards in HoangNguyen0403/agent-skills-standard) into .claude/skills/common-security-standards in your project. Claude Code loads it when a task matches its description.
How do I install Common Security Standards in Codex?
Run `npx skills add HoangNguyen0403/agent-skills-standard --skill common-security-standards -a codex`. Or copy the skill folder (skills/common/common-security-standards in HoangNguyen0403/agent-skills-standard) into .agents/skills/common-security-standards in your project. Codex loads it when a task matches its description.
Can I use Common Security Standards 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 HoangNguyen0403/agent-skills-standard --skill common-security-standards -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/common-security-standards, .gemini/skills/common-security-standards, .github/skills/common-security-standards and .opencode/skills/common-security-standards in your project.
What does Common Security Standards need to run?
Going by SKILL.md and its folder, Common Security Standards needs the command-line tools its instructions call (npm and pip).
Does Common Security Standards access the network?
SKILL.md contains no URLs. Its commands use npm and pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Common Security Standards 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 Common Security Standards use?
Common Security Standards is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Common Security Standards use?
About 764 tokens (SKILL.md is roughly 3.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 674 tokens, read only when the agent opens those files.
What are the alternatives to Common Security Standards?
Skills that share tags, products or a category with Common Security Standards: Better Auth Best Practices (latitude-dev/latitude-llm, 4.7k stars), Debug (sbusso/claudeclaw, 194 stars), API Security Design (vinayaklatthe/microsoft-security-skills, 175 stars) and JS Secrets Extraction (uphiago/recon-skills, 1.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Common Security Standards?
HoangNguyen0403 (a GitHub user) maintains it in HoangNguyen0403/agent-skills-standard, which has 572 GitHub stars. The repository holds 211 skills in this directory. The repository was last updated on October 9, 2026.
Source: HoangNguyen0403/agent-skills-standard on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.