code-security

Included with Lifetime

$97 forever

Security guidelines for writing secure code. Use when writing code, reviewing code for vulnerabilities, or asking about secure coding practices like 'check for SQL injection' or 'review security'. IMPORTANT: Always consult this skill when writing or reviewing any code that handles user input, authentication, file operations, database queries, network requests, cryptography, or infrastructure configuration (Terraform, Kubernetes, Docker, GitHub Actions) — even if the user doesn't explicitly mention security. Also use when users ask to 'review my code', 'check this for bugs', or 'is this safe'.

Backend & APIs

What this skill does


# Code Security Guidelines

Comprehensive security rules for writing secure code across 15+ languages. Covers OWASP Top 10, infrastructure security, and coding best practices with 28 rule categories.

## How to Use This Skill

**Proactive mode** — When writing or reviewing code, automatically check for relevant vulnerabilities based on the language and patterns present. You don't need to wait for the user to ask about security.

**Reactive mode** — When the user asks about security, use the categories below to find the relevant rule file, then read it for detailed vulnerable/secure code examples.

### Workflow
1. Identify the language and what the code does (handles input? queries a DB? reads files?)
2. Check the relevant rules below — focus on Critical and High impact first
3. Read the specific rule file from `rules/` for detailed code examples in that language
4. Apply the secure patterns, or flag the vulnerable patterns if reviewing

## Language-Specific Priority Rules

When writing code in these languages, check these rules first:

| Language | Priority Rules to Check |
|----------|------------------------|
| **Python** | SQL injection, command injection, path traversal, code injection, SSRF, insecure crypto |
| **JavaScript/TypeScript** | XSS, prototype pollution, code injection, insecure transport, CSRF |
| **Java** | SQL injection, XXE, insecure deserialization, insecure crypto, SSRF |
| **Go** | SQL injection, command injection, path traversal, insecure transport |
| **C/C++** | Memory safety, unsafe functions, command injection, path traversal |
| **Ruby** | SQL injection, command injection, code injection, insecure deserialization |
| **PHP** | SQL injection, XSS, command injection, code injection, path traversal |
| **HCL/YAML** | Terraform (AWS/Azure/GCP), Kubernetes, Docker, GitHub Actions |

## Categories

### Critical Impact
- **SQL Injection** (`rules/sql-injection.md`) - Use parameterized queries, never concatenate user input
- **Command Injection** (`rules/command-injection.md`) - Avoid shell commands with user input, use safe APIs
- **XSS** (`rules/xss.md`) - Escape output, use framework protections
- **XXE** (`rules/xxe.md`) - Disable external entities in XML parsers
- **Path Traversal** (`rules/path-traversal.md`) - Validate and sanitize file paths
- **Insecure Deserialization** (`rules/insecure-deserialization.md`) - Never deserialize untrusted data
- **Code Injection** (`rules/code-injection.md`) - Never eval() user input
- **Hardcoded Secrets** (`rules/secrets.md`) - Use environment variables or secret managers
- **Memory Safety** (`rules/memory-safety.md`) - Prevent buffer overflows, use-after-free (C/C++)

### High Impact
- **Insecure Crypto** (`rules/insecure-crypto.md`) - Use SHA-256+, AES-256, avoid MD5/SHA1/DES
- **Insecure Transport** (`rules/insecure-transport.md`) - Use HTTPS, verify certificates
- **SSRF** (`rules/ssrf.md`) - Validate URLs, use allowlists
- **JWT Issues** (`rules/authentication-jwt.md`) - Always verify signatures
- **CSRF** (`rules/csrf.md`) - Use CSRF tokens on state-changing requests
- **Prototype Pollution** (`rules/prototype-pollution.md`) - Validate object keys in JavaScript

### Infrastructure
- **Terraform AWS/Azure/GCP** (`rules/terraform-aws.md`, `rules/terraform-azure.md`, `rules/terraform-gcp.md`) - Encryption, least privilege, no public access
- **Kubernetes** (`rules/kubernetes.md`) - No privileged containers, run as non-root
- **Docker** (`rules/docker.md`) - Don't run as root, pin image versions
- **GitHub Actions** (`rules/github-actions.md`) - Avoid script injection, pin action versions

### Medium/Low Impact
- **Regex DoS** (`rules/regex-dos.md`) - Avoid catastrophic backtracking
- **Race Conditions** (`rules/race-condition.md`) - Use proper synchronization
- **Correctness** (`rules/correctness.md`) - Avoid common logic bugs
- **Best Practices** (`rules/best-practice.md`) - General secure coding patterns

See `rules/_sections.md` for the full index with CWE/OWASP references.

## Quick Reference

| Vulnerability | Key Prevention |
|--------------|----------------|
| SQL Injection | Parameterized queries |
| XSS | Output encoding |
| Command Injection | Avoid shell, use APIs |
| Path Traversal | Validate paths |
| SSRF | URL allowlists |
| Secrets | Environment variables |
| Crypto | SHA-256, AES-256 |

Files: 34

Size: 261.3 KB

Complexity: 62/100

Category: Backend & APIs

Source: https://github.com/semgrep/skills/tree/main/skills/code-security

Related in Backend & APIs

jfrog

Included

Interact with the JFrog Platform via the JFrog CLI and REST/GraphQL APIs. Use this skill when the user wants to manage Artifactory repositories, upload or download artifacts, manage builds, configure permissions, manage users and groups, work with access tokens, configure JFrog CLI servers, search artifacts, manage properties, set up replication, manage JFrog Projects, run security audits or scans, look up CVE details, query exposures scan results from JFrog Advanced Security, manage release bundles and lifecycle operations, aggregate or export platform data, or perform any JFrog Platform administration task. Also use when the user mentions jf, jfrog, artifactory, xray, distribution, evidence, apptrust, onemodel, graphql, workers, mission control, curation, advanced security, exposures, or any JFrog product name.

Backend & APIsscripts

cupynumeric-migration-readiness

Included

Pre-migration readiness assessor for porting NumPy to cuPyNumeric. Use BEFORE substantial porting work begins when the user asks whether code will scale on GPU, whether they should migrate to cuPyNumeric, which NumPy patterns transfer cleanly, what must be refactored before porting, or mentions pre-port assessment, scaling analysis, or refactor planning. Inspect the user's source code, look up NumPy usage, cross-reference the cuPyNumeric API support manifest, and distinguish distributed-scaling-friendly patterns from blockers such as unsupported APIs, scalar synchronization, host round-trips, Python/object-heavy control flow, shape/data-dependent branching, and in-place mutation hazards. Produce a verdict of READY, LIGHT REFACTOR, SIGNIFICANT REFACTOR, or NOT RECOMMENDED, with concrete refactor pointers.

Backend & APIsscripts

alibabacloud-data-agent-skill

Included

Invoke Alibaba Cloud Apsara Data Agent for Analytics via CLI to perform natural language-driven data analysis on enterprise databases. Data Agent for Analytics is an intelligent data analysis agent developed by Alibaba Cloud Database team for enterprise users. It automatically completes requirement analysis, data understanding, analysis insights, and report generation based on natural language descriptions. This tool supports: discovering data resources (instances/databases/tables) managed in DMS, initiating query or deep analysis sessions, real-time progress tracking, and retrieving analysis conclusions and generated reports. Use this Skill when users need to query databases, analyze data trends, generate data reports, ask questions in natural language, or mention "Data Agent", "data analysis", "database query", "SQL analysis", "data insights".

Backend & APIsscripts

token-optimizer

Included

Reduce OpenClaw token usage and API costs through smart model routing, heartbeat optimization, budget tracking, and native 2026.2.15 features (session pruning, bootstrap size limits, cache TTL alignment). Use when token costs are high, API rate limits are being hit, or hosting multiple agents at scale. The 4 executable scripts (context_optimizer, model_router, heartbeat_optimizer, token_tracker) are local-only — no network requests, no subprocess calls, no system modifications. Reference files (PROVIDERS.md, config-patches.json) document optional multi-provider strategies that require external API keys and network access if you choose to use them. See SECURITY.md for full breakdown.

Backend & APIsscripts

resend-cli

Included

Use this skill when the task is specifically about operating Resend from an AI agent, terminal session, or CI job via the official resend CLI: installing/authenticating the CLI, sending/listing/updating/cancelling emails, batch sends, domains and DNS, webhooks and local listeners, inbound receiving, contacts, topics, segments, broadcasts, templates, API keys, profiles, or debugging Resend CLI/API failures. Trigger on mentions of Resend CLI, `resend`, `resend doctor`, `resend emails send`, `resend domains`, `resend webhooks listen`, `resend emails receiving`, or agent-friendly terminal automation.

Backend & APIsscripts

alibabacloud-odps-maxframe-coding

Included

Use this skill for MaxFrame SDK development and documentation navigation on Alibaba Cloud MaxCompute (ODPS). Helps answer MaxFrame API, concept, official example, and supported pandas API questions; create data processing programs; read/write MaxCompute tables; debug jobs (remote or local); and build custom DPE runtime images. Trigger when users mention MaxFrame, MaxCompute with MaxFrame, ODPS table processing, DPE runtime, MaxFrame docs/examples, DataFrame/Tensor operations, or GPU runtime setup. Works for both English and Chinese queries about Alibaba Cloud data processing with MaxFrame.

Backend & APIsscripts