Agent skill

Supercheck Security Auth

by supercheck-io in supercheck-io/supercheck

Work on Supercheck authentication, RBAC, tenant isolation, sessions, API and trigger keys, invitations, project membership, project variables, OAuth, super-admin behavior, SSRF, or…

AGPL-3.0Auto-check passedBackend & APIs

Install Supercheck Security Auth

skills CLI

$ npx skills add supercheck-io/supercheck --skill supercheck-security-auth -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install supercheck-io/supercheck supercheck-security-auth --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/supercheck-io/supercheck.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/security-auth .claude/skills/supercheck-security-auth && rm -rf skills-src

Use ~/.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/

Paste into Claude Code

Install the "supercheck-security-auth" agent skill from https://github.com/supercheck-io/supercheck/tree/main/.agents/skills/security-auth into .claude/skills/supercheck-security-auth/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "supercheck-security-auth", 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

$skill-installer install https://github.com/supercheck-io/supercheck/tree/main/.agents/skills/security-auth

Type 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.

skills CLI

$ npx skills add supercheck-io/supercheck --skill supercheck-security-auth -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install supercheck-io/supercheck supercheck-security-auth --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/supercheck-io/supercheck.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/security-auth .agents/skills/supercheck-security-auth && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "supercheck-security-auth" agent skill from https://github.com/supercheck-io/supercheck/tree/main/.agents/skills/security-auth into .agents/skills/supercheck-security-auth/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "supercheck-security-auth", 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.

skills CLI

$ npx skills add supercheck-io/supercheck --skill supercheck-security-auth -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install supercheck-io/supercheck supercheck-security-auth --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/supercheck-io/supercheck.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/security-auth .cursor/skills/supercheck-security-auth && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "supercheck-security-auth" agent skill from https://github.com/supercheck-io/supercheck/tree/main/.agents/skills/security-auth into .cursor/skills/supercheck-security-auth/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "supercheck-security-auth", 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

$ gemini skills install https://github.com/supercheck-io/supercheck.git --path .agents/skills/security-auth

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add supercheck-io/supercheck --skill supercheck-security-auth -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install supercheck-io/supercheck supercheck-security-auth --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/supercheck-io/supercheck.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/security-auth .gemini/skills/supercheck-security-auth && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "supercheck-security-auth" agent skill from https://github.com/supercheck-io/supercheck/tree/main/.agents/skills/security-auth into .gemini/skills/supercheck-security-auth/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "supercheck-security-auth", 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.

GitHub CLI

$ gh skill install supercheck-io/supercheck supercheck-security-auth

Installs 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).

skills CLI

$ npx skills add supercheck-io/supercheck --skill supercheck-security-auth -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/supercheck-io/supercheck.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/security-auth .github/skills/supercheck-security-auth && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "supercheck-security-auth" agent skill from https://github.com/supercheck-io/supercheck/tree/main/.agents/skills/security-auth into .github/skills/supercheck-security-auth/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "supercheck-security-auth", 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.

skills CLI

$ npx skills add supercheck-io/supercheck --skill supercheck-security-auth -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install supercheck-io/supercheck supercheck-security-auth --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/supercheck-io/supercheck.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/security-auth .opencode/skills/supercheck-security-auth && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "supercheck-security-auth" agent skill from https://github.com/supercheck-io/supercheck/tree/main/.agents/skills/security-auth into .opencode/skills/supercheck-security-auth/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "supercheck-security-auth", 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: supercheck-security-auth
GitHub stars: 215
Token cost: ~1.2k tokens
SKILL.md length: 519 words
Files: 1
Skills in repo: 12
Repo updated: Oct 9, 2026
First seen: Oct 7, 2026
Licence: AGPL-3.0

At a glance

Work on Supercheck authentication, RBAC, tenant isolation, sessions, API and trigger keys, invitations, project membership, project variables, OAuth, super-admin behavior, SSRF, or…

Project membership
SKILL.md covers Authentication, Roles, membership, and scope, API and trigger keys and Project variables and encryption, plus 2 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Project variables

What it does

Supercheck Security Auth is an agent skill from supercheck-io/supercheck. Work on Supercheck authentication, RBAC, tenant isolation, sessions, API and trigger keys, invitations, project membership, project variables, OAuth, super-admin behavior, SSRF, or security-sensitive routes.

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Backend & APIs, covering Authorization and RBAC, Multi-tenancy and Web application vulnerabilities. The repository describes itself as: Open-Source Testing, Monitoring, and AI SRE — as Code. The licence is AGPL-3.0.

When your agent uses it

Project membership
Project variables
Super-admin behavior
Security-sensitive routes

Example prompts

“/supercheck-security-auth”

What it can do on your machine

Read from SKILL.md and the folder at commit 155da39. 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 mermaid).
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

Supercheck Security Auth loads about 1.2k tokens when it runs. Until then it costs about 58 tokens; SKILL.md has 519 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~58
When it runs · the whole SKILL.md, loaded when a task matches: ~1.2k

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 supercheck-io/supercheck at commit 155da39, republished under its AGPL-3.0 licence (© supercheck-io). 519 words, ~1,216 tokens.

Download SKILL.mdSave it as .claude/skills/supercheck-security-auth/SKILL.md (or your agent's skills folder).

name: supercheck-security-auth
description: Work on Supercheck authentication, RBAC, tenant isolation, sessions, API and trigger keys, invitations, project membership, project variables, OAuth, super-admin behavior, SSRF, or security-sensitive routes.

Supercheck security and authentication

mermaid

flowchart LR
  REQ[Cookie or bearer request] --> AUTH[Resolve identity]
  AUTH --> SCOPE[Resolve organization/project]
  SCOPE --> RBAC{Authorize exact action}
  RBAC -->|allow| VALIDATE[Validate input]
  VALIDATE --> QUERY[Scoped operation]
  RBAC -->|deny| DENY[401 or 403]

Authentication

Better Auth owns browser sessions, users, organizations, and membership. Do not add NextAuth patterns.
Browser routes may use session cookies. CLI and API-key routes require bearer-compatible auth context.
Never use a cookie-only permission helper in an API route that supports CLI bearer tokens.
Return 401 when identity is absent/invalid and 403 when an authenticated identity lacks permission.
Session cookies retain secure, HTTP-only, same-site, domain, expiration, revocation, and proxy-aware behavior.
OAuth redirect URLs must exactly match provider configuration. GitHub applications require access to user email; Google requires configured consent and callback URLs.

Roles, membership, and scope

Read canonical resources, actions, and roles from app/src/lib/rbac; never recreate role strings or a second permission matrix.
Resolve tenant context before data access. IDs supplied by clients are selectors, not proof of ownership.
Organization resources scope to the authenticated organization. Project resources additionally verify project ownership/membership.
Project admins/editors require the applicable project membership relationship. Organization-wide privileges apply only through central RBAC rules.
Invitations validate organization/project, role eligibility, normalized email, expiry, reuse/acceptance state, and inviter authority.
Super-admin routes require explicit global-admin authorization and must not reuse ordinary tenant authorization as a shortcut.
Security, membership, secret, administration, and billing mutations produce redacted audit events.

API and trigger keys

CLI/session API tokens, test keys, and job trigger keys are different credential classes. Validate type, prefix/current format, expiry, enabled state, scope, and allowed operation.
Store credential material according to the current one-time-display/hash design; never make plaintext recoverable through list/get APIs.
Token lists expose safe metadata only. Creation returns a plaintext token only at the intended one-time boundary.
Rate-limit authentication and credential-sensitive endpoints and return useful retry metadata where supported.
Do not put tokens in repository config, URLs, logs, analytics, error messages, queue payloads, or client persistence beyond the intended secure store.

Show full SKILL.md (222 more words)Show less

Project variables and encryption

Encrypt secret values server-side with the current scoped encryption context and split keys.
List/read APIs return redacted metadata for secrets. Decryption occurs only immediately before authorized isolated execution.
Never enqueue decrypted variables or persist them in capacity/job payloads.
File variables use the supported upload path and size/type controls. They are not serialized into CLI config.
Playwright and k6 variable/file semantics differ. In k6, readFile() is unsupported; use open(getFile('KEY')) during init.
Redact resolved secret values from stdout, stderr, execution logs, notifications, traces, and error objects.

Input, browser, and network security

Use shared Zod schemas and size/shape bounds for all untrusted data.
User-controlled outbound URLs use the shared pinned-public-fetch/SSRF policy. Validate protocol, resolution, every redirect, and final connection target; block private/reserved ranges and metadata endpoints, including IPv4/IPv6 transition forms.
Browser messages require event.source, exact parsed origin, allowed protocol/hostname, and schema-valid payloads. Use exact targetOrigin, never *, for privileged communication.
Preserve CSRF, CSP, origin, proxy-header, upload, and response-field allowlisting protections.
Provider/webhook signatures are verified before parsing side effects; webhook processing is idempotent and tenant-bound.

Required negative tests

Cross-organization and cross-project reads/writes.
Cookie versus bearer callers for dual-auth routes.
Wrong role/action, revoked/expired/wrong-type keys, reused invitations, and super-admin denial.
Secret redaction in API output, logs, queues, and failures.
SSRF through redirects, DNS rebinding, alternate IP forms, localhost/private/metadata targets.
Forged browser origins/sources and malformed messages.

Files

Just SKILL.md in .agents/skills/security-auth of supercheck-io/supercheck.

Open the folder on GitHubat commit 155da39

Compare with similar skills

Supercheck Security Auth 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.

Supercheck Security Auth compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Supercheck Security Auth this skillsupercheck-io/supercheck	215	—	~1.2k	Automated safety check: Pass	AGPL-3.0	today
Quarkus Securityaffaan-m/ECC	276k	—	~2.6k	Automated safety check: Pass	MIT	4 days ago
Quarkus Securityaffaan-m/ECC	276k	—	~2.8k	Automated safety check: Pass	MIT	4 days ago
Quarkus Securityaffaan-m/ECC	276k	—	~3.1k	Automated safety check: Pass	MIT	4 days ago
Cometchat Securitycometchat/cometchat-skills	131	—	~1.9k	Automated safety check: Pass	MIT	4 days ago
Authaiskillstore/marketplace	430	—	~1.6k	Automated safety check: Pass	None	today

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More from supercheck-io/supercheck

All 12 skills in this repo

Supercheck Architecture
supercheck-io/supercheck
Work on Supercheck system architecture, Next.js routes and actions, React data hooks, Drizzle schemas and migrations, app-worker boundaries, or cross-package contracts.
215 GitHub stars~1.3k tokensUpdated today
Auto-check passed
Supercheck Code Review
supercheck-io/supercheck
Review Supercheck staged, unstaged, commit, branch, or pull-request changes for correctness, regressions, security, tenancy, architecture, tests, docs, licensing, and commit/merge/release readiness.
215 GitHub stars~1k tokensUpdated today
Auto-check passed
Supercheck Data Storage
supercheck-io/supercheck
Work on Supercheck PostgreSQL data, S3 or MinIO artifacts, signed URLs and asset proxying, retention cleanup, dashboard/report queries, exports, or audit logging.
215 GitHub stars~942 tokensUpdated today
Auto-check passed
Supercheck Execution Engine
supercheck-io/supercheck
Work on Supercheck BullMQ queues, schedulers, capacity management, Playwright or k6 execution, monitors, dynamic locations, cancellation, Redis, Kubernetes Jobs, gVisor, or app-worker execution…
215 GitHub stars~1.2k tokensUpdated today
Auto-check passed
Supercheck Feature Implementation
supercheck-io/supercheck
Implement a new or changed Supercheck feature end to end across schema, auth/RBAC, services, routes/actions, UI, queues/workers, CLI/recorder, tests, docs, and deployment contracts.
215 GitHub stars~1.1k tokensUpdated today
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Supercheck Infrastructure Deployment
supercheck-io/supercheck
Work on Supercheck Docker Compose, K3s, Kubernetes manifests, gVisor, OpenTofu/Hetzner, secrets, external services, autoscaling, backups, disaster recovery, DNS/TLS, or production deployment.
215 GitHub stars~1.4k tokensUpdated today
Auto-check: notes

Questions about Supercheck Security Auth

What does Supercheck Security Auth do?

Work on Supercheck authentication, RBAC, tenant isolation, sessions, API and trigger keys, invitations, project membership, project variables, OAuth, super-admin behavior, SSRF, or…. Supercheck Security Auth is an agent skill from supercheck-io/supercheck. Work on Supercheck authentication, RBAC, tenant isolation, sessions, API and trigger keys, invitations, project membership, project variables, OAuth, super-admin behavior, SSRF, or security-sensitive routes.

When should I use Supercheck Security Auth?

Supercheck Security Auth fits situations like: project membership; project variables; super-admin behavior; security-sensitive routes.

How do I install Supercheck Security Auth in Claude Code?

Run `npx skills add supercheck-io/supercheck --skill supercheck-security-auth -a claude-code`. Or copy the skill folder (.agents/skills/security-auth in supercheck-io/supercheck) into .claude/skills/supercheck-security-auth in your project. Claude Code loads it when a task matches its description.

How do I install Supercheck Security Auth in Codex?

Run `npx skills add supercheck-io/supercheck --skill supercheck-security-auth -a codex`. Or copy the skill folder (.agents/skills/security-auth in supercheck-io/supercheck) into .agents/skills/supercheck-security-auth in your project. Codex loads it when a task matches its description.

Can I use Supercheck Security Auth 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 supercheck-io/supercheck --skill supercheck-security-auth -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/supercheck-security-auth, .gemini/skills/supercheck-security-auth, .github/skills/supercheck-security-auth and .opencode/skills/supercheck-security-auth in your project.

What does Supercheck Security Auth need to run?

SKILL.md names no scripts, command-line tools or credentials: Supercheck Security Auth is instructions for the agent only.

Does Supercheck Security Auth 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 Supercheck Security Auth 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 Supercheck Security Auth use?

Supercheck Security Auth is published under the AGPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Supercheck Security Auth use?

About 1.2k tokens (SKILL.md is roughly 4.9k 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 Supercheck Security Auth?

Skills that share tags, products or a category with Supercheck Security Auth: Quarkus Security (affaan-m/ECC, 276k stars), Quarkus Security (affaan-m/ECC, 276k stars), Quarkus Security (affaan-m/ECC, 276k stars) and Cometchat Security (cometchat/cometchat-skills, 131 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Supercheck Security Auth?

supercheck-io (a GitHub organization) maintains it in supercheck-io/supercheck, which has 215 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on October 9, 2026.

Source: supercheck-io/supercheck on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Supercheck Security Auth

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Supercheck security and authentication

Authentication

Roles, membership, and scope

API and trigger keys

Project variables and encryption

Input, browser, and network security

Required negative tests

Files

Compare with similar skills

Similar skills

More from supercheck-io/supercheck

Related

Questions about Supercheck Security Auth