docker-lint

docker-lint is a command for Claude Code from fatihkan/badi. It costs 0 tokens per session (406 once invoked), scanned B, original, MIT.

A Dockerfile checker that reviews how a container image is built. It flags practices that can increase security risks, image size, or differences between builds.

In plain words
What is it for?
Use it to review base image versions, user permissions, health checks, package-install commands, file-copy instructions, exposed ports, and .dockerignore settings.
Why use it?
It catches common Docker setup problems before they reach production, such as running as root, using unpinned image versions, or leaving unnecessary files in the build context.

Command for Claude Code

Written for Claude Code: installed under .claude/.

Part of the badi plugin — 81 skills, 86 commands, 30 agents, 7 hooks shipped together

Good fit Use it to review base image versions, user permissions, health checks, package-install…

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/fatihkan/badi/docker-lint
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/fatihkan/badi

Made for: Claude Code.

Or install badi, the plugin that ships this one along with the rest of its 81 skills, 86 commands, 30 agents, 7 hooks.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for docker-lint

README.md
[![agentmods](https://agentmods.dev/badge/commands/fatihkan/badi/docker-lint.svg)](https://agentmods.dev/commands/fatihkan/badi/docker-lint)
Your own site
<a href="https://agentmods.dev/commands/fatihkan/badi/docker-lint"><img src="https://agentmods.dev/badge/commands/fatihkan/badi/docker-lint.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 406 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 3 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00406
Opus 5 $0.00000 $0.00203
Sonnet 5 $0.00000 $0.00081
Haiku 4.5 $0.00000 $0.00041

Measured today against content hash 219173d018ec, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade B, and why

docker-lint scanned grade B with 3 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Asks for rootlowPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- `chmod 777` forbidden

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Recursive force deletemediumDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

- `rm -rf /var/lib/apt/lists/*` (cleanup)

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

HEALTHCHECK --interval=30s CMD curl -f http://localhost:3000/health || exit 1
.claude/commands/docker-lint.md · 75 lines

What it actually says

Dockerfile best-practice checks. Security, size, and reproducibility warnings.

Required Tools

  • Bash (badi dev docker-lint)

Procedure

Step 1: Check

badi dev docker-lint

Step 2: What Is Checked

FROM:

  • Version pinning instead of :latest (security + reproducibility)
  • Alpine/distroless preference suggestion

USER:

  • Without a USER directive it runs as root (security risk)
  • Creating a non-root user is recommended

HEALTHCHECK:

  • Mandatory for orchestration
  • HTTP endpoint or command

RUN apt-get:

  • update + install in the same RUN (cache busting)
  • --no-install-recommends (size)
  • rm -rf /var/lib/apt/lists/* (cleanup)

ADD vs COPY:

  • ADD should not be used outside its tar feature
  • COPY for local files

Permissions:

  • chmod 777 forbidden
  • 755 or tighter

Ports:

  • EXPOSE < 1024 requires root

.dockerignore:

  • Must exist (node_modules, .git, etc.)

Step 3: Advanced Tools

For detailed analysis:

brew install hadolint
hadolint Dockerfile

Step 4: Common Fixes

# BEFORE
FROM node:latest
RUN apt-get update
RUN apt-get install -y python3

# AFTER
FROM node:20-alpine
RUN apt-get update && apt-get install -y --no-install-recommends python3 \
    && rm -rf /var/lib/apt/lists/*
USER node
HEALTHCHECK --interval=30s CMD curl -f http://localhost:3000/health || exit 1

Example

/docker-lint
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. today First seen · 75 lines · 0 tokens per session scan B 219173d018ec

Subscribe to this mod's changes

docker-lint is a command published in the GitHub repository fatihkan/badi (7 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 406 tokens. A static security scan graded it B with 3 findings (asks for root, recursive force delete, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-06.