Code Security
semgrep/skills
Security guidelines for writing secure code. An agent skill from semgrep/skills.
Lints Dockerfiles with Hadolint for security misconfigurations and best-practice violations, locally and in CI, with strict, balanced and permissive rule templates.
Install Hadolint Dockerfile Security Linting
$ npx skills add AgentSecOps/SecOpsAgentKit --skill container-hadolint -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install AgentSecOps/SecOpsAgentKit container-hadolint --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/AgentSecOps/SecOpsAgentKit.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/devsecops/container-hadolint .claude/skills/container-hadolint && 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 "container-hadolint" agent skill from https://github.com/AgentSecOps/SecOpsAgentKit/tree/main/skills/devsecops/container-hadolint into .claude/skills/container-hadolint/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "container-hadolint", 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/AgentSecOps/SecOpsAgentKit/tree/main/skills/devsecops/container-hadolintType 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 AgentSecOps/SecOpsAgentKit --skill container-hadolint -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install AgentSecOps/SecOpsAgentKit container-hadolint --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/AgentSecOps/SecOpsAgentKit.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/devsecops/container-hadolint .agents/skills/container-hadolint && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "container-hadolint" agent skill from https://github.com/AgentSecOps/SecOpsAgentKit/tree/main/skills/devsecops/container-hadolint into .agents/skills/container-hadolint/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "container-hadolint", 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 AgentSecOps/SecOpsAgentKit --skill container-hadolint -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install AgentSecOps/SecOpsAgentKit container-hadolint --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/AgentSecOps/SecOpsAgentKit.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/devsecops/container-hadolint .cursor/skills/container-hadolint && 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 "container-hadolint" agent skill from https://github.com/AgentSecOps/SecOpsAgentKit/tree/main/skills/devsecops/container-hadolint into .cursor/skills/container-hadolint/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "container-hadolint", 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/AgentSecOps/SecOpsAgentKit.git --path skills/devsecops/container-hadolint--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 AgentSecOps/SecOpsAgentKit --skill container-hadolint -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install AgentSecOps/SecOpsAgentKit container-hadolint --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/AgentSecOps/SecOpsAgentKit.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/devsecops/container-hadolint .gemini/skills/container-hadolint && 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 "container-hadolint" agent skill from https://github.com/AgentSecOps/SecOpsAgentKit/tree/main/skills/devsecops/container-hadolint into .gemini/skills/container-hadolint/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "container-hadolint", 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 AgentSecOps/SecOpsAgentKit container-hadolintInstalls 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 AgentSecOps/SecOpsAgentKit --skill container-hadolint -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/AgentSecOps/SecOpsAgentKit.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/devsecops/container-hadolint .github/skills/container-hadolint && 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 "container-hadolint" agent skill from https://github.com/AgentSecOps/SecOpsAgentKit/tree/main/skills/devsecops/container-hadolint into .github/skills/container-hadolint/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "container-hadolint", 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 AgentSecOps/SecOpsAgentKit --skill container-hadolint -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install AgentSecOps/SecOpsAgentKit container-hadolint --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/AgentSecOps/SecOpsAgentKit.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/devsecops/container-hadolint .opencode/skills/container-hadolint && 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 "container-hadolint" agent skill from https://github.com/AgentSecOps/SecOpsAgentKit/tree/main/skills/devsecops/container-hadolint into .opencode/skills/container-hadolint/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "container-hadolint", 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
container-hadolint- GitHub stars
- 219
- Used in
- 1 other repo
- Token cost
- ~4.4k tokens
- SKILL.md length
- 872 words
- Files
- 9 (incl. references, assets)
- Skills in repo
- 24
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Lints Dockerfiles with Hadolint for security misconfigurations and best-practice violations, locally and in CI, with strict, balanced and permissive rule templates.
- Works in 6 steps: Local Development Scanning → CI/CD Pipeline Integration → Configuration Customization → …
- Auditing a Dockerfile for security misconfigurations and anti-patterns
- SKILL.md covers Overview, Quick Start, Core Workflows and Security Considerations, plus 3 more sections
- Calls hadolint, docker and jq; reaches github.com
What it does
Hadolint checks Dockerfile instructions before images are built and deployed, and it passes RUN instructions through ShellCheck. The skill covers installing it, scanning a Dockerfile and producing JSON output for automation, and it explains the report format, with rule codes such as DL3008 and DL3025 and severity levels of error, warning and info. It cites 100+ built-in rules mapped to CIS Docker Benchmark controls.
Four workflows are laid out: local scanning, CI/CD integration with GitHub Actions and GitLab CI examples, rule customization through a .hadolint.yaml file, and security-focused validation, which the excerpt cuts off. The assets folder holds strict, balanced and permissive config templates plus the two CI files, and the references folder has a security rules guide and an example.
When your agent uses it
- Auditing a Dockerfile for security misconfigurations and anti-patterns
- Adding a Dockerfile lint step to a GitHub Actions or GitLab CI pipeline
- Checking container builds for hardcoded secrets and credentials
- Validating Dockerfiles against CIS Docker Benchmark requirements
Example prompts
- “Scan the Dockerfile in this repo with Hadolint and explain each finding.”
- “Add a Hadolint job to our GitLab CI pipeline that fails on warnings.”
- “Set up a .hadolint.yaml that suits a legacy Dockerfile without drowning us in noise.”
Requirements
- Hadolint
- A Dockerfile to scan
Workflow steps
6 steps, taken from the step headings in SKILL.md.
- Local Development Scanning
- CI/CD Pipeline Integration
- Configuration Customization
- Security-Focused Validation
- Multi-Stage Build Validation
- Pre-Commit Hook Integration
What it can do on your machine
Read from SKILL.md and the folder at commit 6e25a4b. 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:
hadolintdockerjqbrewwgetgitgh
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
github.com
Also links to:
cisecurity.orgdocs.docker.comshellcheck.net
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
Hadolint Dockerfile Security Linting loads about 4.4k tokens when it runs, and up to ~6.9k if it reads all its reference files. Until then it costs about 147 tokens; SKILL.md has 872 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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 872 words (~4,354 tokens).
“Hadolint is a Dockerfile linter that validates container build files against security best practices and the CIS Docker Benchmark. It analyzes Dockerfile instructions to identify misconfigurations, anti-patterns, and security vulnerabilities before images are built and deployed.”
- name
- container-hadolint
- version
- 0.1.0
- maintainer
- SirAppSec
- category
- devsecops
- tags
- docker, hadolint, dockerfile, container-security, cis-benchmark, linting, ci-cd
- frameworks
- CIS, OWASP
- dependencies.tools
- hadolint, docker
- references
- https://github.com/hadolint/hadolint, https://www.cisecurity.org/benchmark/docker, https://docs.docker.com/develop/develop-images/dockerfile_best-practices/
Files
SKILL.md and 8 other files (references, assets) in skills/devsecops/container-hadolint of AgentSecOps/SecOpsAgentKit.
- SKILL.md
- assets/.gitkeep
- assets/github-actions.yml
- assets/gitlab-ci.yml
- assets/hadolint-balanced.yaml
- assets/hadolint-permissive.yaml
- assets/hadolint-strict.yaml
- references/EXAMPLE.md
- references/security_rules.md
Open the folder on GitHubat commit 6e25a4b
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in AgentSecOps/SecOpsAgentKit, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Hadolint Dockerfile Security Linting 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 |
|---|---|---|---|---|---|---|
| Hadolint Dockerfile Security Linting this skillAgentSecOps/SecOpsAgentKit | 219 | 1 repos | ~4.4k | Automated safety check: Pass | Custom licence | |
| Code Securitysemgrep/skills | 322 | — | ~1.2k | Automated safety check: Pass | Custom licence | |
| CI/CD Pipeline Principlesirahardianto/awesome-agv | 157 | — | ~2.7k | Automated safety check: Notes | MIT | |
| Megatron-LM Base Image BumpNVIDIA/Megatron-LM | 18k | — | ~2.8k | Automated safety check: Pass | Apache-2.0 | |
| Building Devsecops Pipeline With GitLab CImukul975/Anthropic-Cybersecurity-Skills | 34k | — | ~2.2k | Automated safety check: Pass | Apache-2.0 | |
| Senior DevOps Toolkitmaslennikov-ig/claude-code-orchestrator-kit | 259 | 6 repos | ~1.1k | Automated safety check: Notes | Custom licence |
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NVIDIA/Megatron-LM
Moves Megatron-LM CI to a newer NVIDIA PyTorch base image, updating both the GitHub and GitLab pins together and handling the CI follow-up.
Building Devsecops Pipeline With GitLab CI
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Related
Works with
Categories
Questions about Hadolint Dockerfile Security Linting
What does Hadolint Dockerfile Security Linting do?
Lints Dockerfiles with Hadolint for security misconfigurations and best-practice violations, locally and in CI, with strict, balanced and permissive rule templates. Hadolint checks Dockerfile instructions before images are built and deployed, and it passes RUN instructions through ShellCheck. The skill covers installing it, scanning a Dockerfile and producing JSON output for automation, and it explains the report format, with rule codes such as DL3008 and DL3025 and severity levels of error, warning and info.
When should I use Hadolint Dockerfile Security Linting?
Hadolint Dockerfile Security Linting fits situations like: auditing a Dockerfile for security misconfigurations and anti-patterns; adding a Dockerfile lint step to a GitHub Actions or GitLab CI pipeline; checking container builds for hardcoded secrets and credentials; validating Dockerfiles against CIS Docker Benchmark requirements.
How do I install Hadolint Dockerfile Security Linting in Claude Code?
Run `npx skills add AgentSecOps/SecOpsAgentKit --skill container-hadolint -a claude-code`. Or copy the skill folder (skills/devsecops/container-hadolint in AgentSecOps/SecOpsAgentKit) into .claude/skills/container-hadolint in your project. Claude Code loads it when a task matches its description.
How do I install Hadolint Dockerfile Security Linting in Codex?
Run `npx skills add AgentSecOps/SecOpsAgentKit --skill container-hadolint -a codex`. Or copy the skill folder (skills/devsecops/container-hadolint in AgentSecOps/SecOpsAgentKit) into .agents/skills/container-hadolint in your project. Codex loads it when a task matches its description.
Can I use Hadolint Dockerfile Security Linting 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 AgentSecOps/SecOpsAgentKit --skill container-hadolint -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/container-hadolint, .gemini/skills/container-hadolint, .github/skills/container-hadolint and .opencode/skills/container-hadolint in your project.
What does Hadolint Dockerfile Security Linting need to run?
Going by SKILL.md and its folder, Hadolint Dockerfile Security Linting needs the command-line tools its instructions call (hadolint, docker, jq, brew, wget and git). Our summary lists: Hadolint; A Dockerfile to scan.
Does Hadolint Dockerfile Security Linting access the network?
SKILL.md names 4 domains. In commands or code: github.com; the agent is likely to contact it when it follows the instructions. As links in the text: cisecurity.org, docs.docker.com and shellcheck.net. This is read from the text; nothing was executed.
Is Hadolint Dockerfile Security Linting 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 Hadolint Dockerfile Security Linting use?
Hadolint Dockerfile Security Linting has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Hadolint Dockerfile Security Linting use?
About 4.4k tokens (SKILL.md is roughly 17k 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 2.6k tokens, read only when the agent opens those files.
What are the alternatives to Hadolint Dockerfile Security Linting?
Skills that share tags, products or a category with Hadolint Dockerfile Security Linting: Code Security (semgrep/skills, 322 stars), CI/CD Pipeline Principles (irahardianto/awesome-agv, 157 stars), Megatron-LM Base Image Bump (NVIDIA/Megatron-LM, 18k stars) and Building Devsecops Pipeline With GitLab CI (mukul975/Anthropic-Cybersecurity-Skills, 34k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Hadolint Dockerfile Security Linting?
AgentSecOps (a GitHub organization) maintains it in AgentSecOps/SecOpsAgentKit, which has 219 GitHub stars. The repository holds 24 skills in this directory. The repository was last updated on April 15, 2026.
Source: AgentSecOps/SecOpsAgentKit on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.