Thorough Code Review
pretend1111/claude-desktop-app
Reviews code or recent changes for bugs, security issues, performance problems and maintainability, reporting findings by severity with the reason and a fix.
Expert in secure backend coding practices specializing in input validation, authentication, and API security.
Install Backend Security Coder
$ npx skills add aiskillstore/marketplace --skill backend-security-coder -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace backend-security-coder --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/aiskillstore/marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/sickn33/backend-security-coder .claude/skills/backend-security-coder && 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 "backend-security-coder" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/backend-security-coder into .claude/skills/backend-security-coder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "backend-security-coder", 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/aiskillstore/marketplace/tree/main/skills/sickn33/backend-security-coderType 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 aiskillstore/marketplace --skill backend-security-coder -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace backend-security-coder --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/sickn33/backend-security-coder .agents/skills/backend-security-coder && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "backend-security-coder" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/backend-security-coder into .agents/skills/backend-security-coder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "backend-security-coder", 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 aiskillstore/marketplace --skill backend-security-coder -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace backend-security-coder --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/sickn33/backend-security-coder .cursor/skills/backend-security-coder && 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 "backend-security-coder" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/backend-security-coder into .cursor/skills/backend-security-coder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "backend-security-coder", 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/aiskillstore/marketplace.git --path skills/sickn33/backend-security-coder--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 aiskillstore/marketplace --skill backend-security-coder -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace backend-security-coder --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/sickn33/backend-security-coder .gemini/skills/backend-security-coder && 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 "backend-security-coder" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/backend-security-coder into .gemini/skills/backend-security-coder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "backend-security-coder", 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 aiskillstore/marketplace backend-security-coderInstalls 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 aiskillstore/marketplace --skill backend-security-coder -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/sickn33/backend-security-coder .github/skills/backend-security-coder && 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 "backend-security-coder" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/backend-security-coder into .github/skills/backend-security-coder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "backend-security-coder", 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 aiskillstore/marketplace --skill backend-security-coder -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install aiskillstore/marketplace backend-security-coder --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/sickn33/backend-security-coder .opencode/skills/backend-security-coder && 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 "backend-security-coder" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/backend-security-coder into .opencode/skills/backend-security-coder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "backend-security-coder", 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
backend-security-coder- GitHub stars
- 430
- Used in
- 6 other repos
- Token cost
- ~2.6k tokens
- SKILL.md length
- 1,113 words
- Files
- 2
- Skills in repo
- 1,085
- Repo updated
- First seen
- Licence
- None found
At a glance
Expert in secure backend coding practices specializing in input validation, authentication, and API security.
- Works in 9 steps: Assess security requirements including… → Implement input validation with… → Configure secure authentication with… → …
- Tasks that involve Code review
- SKILL.md covers Use this skill when, Do not use this skill when, Instructions and Purpose, plus 7 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Backend Security Coder is an agent skill from aiskillstore/marketplace. Expert in secure backend coding practices specializing in input validation, authentication, and API security. Use PROACTIVELY for backend security implementations or security code reviews.
Its SKILL.md is about 2.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `skill-report.json`).
It sits in Development, covering Code review, Authentication and Secure coding. The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
When your agent uses it
- Tasks that involve Code review
- Tasks that involve Authentication
- Tasks that involve Secure coding
Example prompts
- “/backend-security-coder”
Requirements
- Docker
Workflow steps
9 steps, taken from the first numbered list in SKILL.md.
- Assess security requirements including threat model and compliance needs
- Implement input validation with comprehensive sanitization and allowlist approaches
- Configure secure authentication with multi-factor authentication and session management
- Apply database security with parameterized queries and access controls
- Set security headers and implement CSRF protection for web applications
- Implement secure API design with proper authentication and rate limiting
- Configure secure external requests with allowlists and validation
- Set up security logging and monitoring for threat detection
- Review and test security controls with both automated and manual testing
What it can do on your machine
Read from SKILL.md and the folder at commit 4ac52da. 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.
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
Backend Security Coder loads about 2.6k tokens when it runs. Until then it costs about 53 tokens; SKILL.md has 1,113 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 1,113 words (~2,551 tokens).
“You are a backend security coding expert specializing in secure development practices, vulnerability prevention, and secure architecture implementation.”
- name
- backend-security-coder
- risk
- critical
- source
- community
- date_added
- 2026-02-27
Files
SKILL.md and 1 other file in skills/sickn33/backend-security-coder of aiskillstore/marketplace.
- SKILL.md
- skill-report.json
Open the folder on GitHubat commit 4ac52da
Used in 6 other repositories
We found 21 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 6 other GitHub owners. This page covers the copy in aiskillstore/marketplace, which our catalogue first saw on October 7, 2026.
- sickn33/agentic-awesome-skillsskills/backend-security-coderplugins/agentic-awesome-skills/skills/backend-security-coder+3 more
- rmyndharis/antigravity-skillsskills/backend-security-coder
- agent-skills-hub/agent-skills-hubskills/backend-security-coder
- lingxling/awesome-skills-cnantigravity-awesome-skills/skills/backend-security-coderantigravity-awesome-skills/plugins/agentic-awesome-skills/skills/backend-security-coder+3 more
- benjaminasterA/antigravity-awesome-skillsskills/backend-security-coder
- henryalouf/ruflow.agents/skills/backend-security-coder.agents/skills/antigravity-awesome-skills/skills/backend-security-coder+6 more
Compare with similar skills
Backend Security Coder 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 |
|---|---|---|---|---|---|---|
| Backend Security Coder this skillaiskillstore/marketplace | 430 | 6 repos | ~2.6k | Automated safety check: Pass | None | |
| Thorough Code Reviewpretend1111/claude-desktop-app | 494 | 1 repos | ~502 | Automated safety check: Pass | Custom licence | |
| WordPress Code GuardamElnagdy/guard-skills | 1.3k | — | ~2.4k | Automated safety check: Pass | MIT | |
| ReviewdogAgentSecOps/SecOpsAgentKit | 219 | 1 repos | ~3k | Automated safety check: Pass | Custom licence | |
| ONNX Runtime Shape Inference Safety Auditmicrosoft/onnxruntime | 22k | — | ~3.3k | Automated safety check: Pass | MIT | |
| Security Review ChecklistZeroDeng01/sublinkPro | 1.7k | — | ~2.3k | Automated safety check: Pass | MIT |
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Checklist-driven security review for changes to authentication, authorization, MFA, secrets, input validation and other security-critical code.
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Categories
Questions about Backend Security Coder
What does Backend Security Coder do?
Expert in secure backend coding practices specializing in input validation, authentication, and API security. Backend Security Coder is an agent skill from aiskillstore/marketplace. Expert in secure backend coding practices specializing in input validation, authentication, and API security.
When should I use Backend Security Coder?
Backend Security Coder fits situations like: tasks that involve Code review; tasks that involve Authentication; tasks that involve Secure coding.
How do I install Backend Security Coder in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill backend-security-coder -a claude-code`. Or copy the skill folder (skills/sickn33/backend-security-coder in aiskillstore/marketplace) into .claude/skills/backend-security-coder in your project. Claude Code loads it when a task matches its description.
How do I install Backend Security Coder in Codex?
Run `npx skills add aiskillstore/marketplace --skill backend-security-coder -a codex`. Or copy the skill folder (skills/sickn33/backend-security-coder in aiskillstore/marketplace) into .agents/skills/backend-security-coder in your project. Codex loads it when a task matches its description.
Can I use Backend Security Coder 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 aiskillstore/marketplace --skill backend-security-coder -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/backend-security-coder, .gemini/skills/backend-security-coder, .github/skills/backend-security-coder and .opencode/skills/backend-security-coder in your project.
What does Backend Security Coder need to run?
SKILL.md names no scripts, command-line tools or credentials: Backend Security Coder is instructions for the agent only. Our summary lists: Docker.
Does Backend Security Coder 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 Backend Security Coder 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 Backend Security Coder use?
No licence was found for Backend Security Coder or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Backend Security Coder use?
About 2.6k tokens (SKILL.md is roughly 10k 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 Backend Security Coder?
Skills that share tags, products or a category with Backend Security Coder: Thorough Code Review (pretend1111/claude-desktop-app, 494 stars), WordPress Code Guard (amElnagdy/guard-skills, 1.3k stars), Reviewdog (AgentSecOps/SecOpsAgentKit, 219 stars) and ONNX Runtime Shape Inference Safety Audit (microsoft/onnxruntime, 22k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Backend Security Coder?
aiskillstore (a GitHub organization) maintains it in aiskillstore/marketplace, which has 430 GitHub stars. The repository holds 1,085 skills in this directory. The repository was last updated on October 7, 2026.
Source: aiskillstore/marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.