trove-docker

trove-docker is a skill for Claude Code, Codex from bravew/trove. It costs 21 tokens per session (414 once invoked), scanned A, original, MIT.

A collection of Dockerfile and Docker Compose guidelines for building and running applications in containers. It covers versioned base images, dependency caching, multi-stage builds, non-root users, health checks, and related configuration.

In plain words
What is it for?
Use it when creating or editing Dockerfiles or Docker Compose files, including dependency installation, production image setup, and container health configuration.
Why use it?
It helps keep container builds repeatable, smaller, safer, and easier to cache. It also points out common issues such as using floating image tags or copying frequently changing files too early.

Skill for Claude CodeCodex

Part of the trove-infra plugin — 3 skills shipped together

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.

agentmods
npx agentmods add skills/bravew/trove/trove-docker
Any agent
npx skills add bravew/trove --skill trove-docker
Clone the repo
git clone --depth 1 https://github.com/bravew/trove

Made for: Claude Code, Codex.

Or install trove-infra, the plugin that ships this one along with the rest of its 3 skills.

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 trove-docker

README.md
[![agentmods](https://agentmods.dev/badge/skills/bravew/trove/trove-docker.svg)](https://agentmods.dev/skills/bravew/trove/trove-docker)
Your own site
<a href="https://agentmods.dev/skills/bravew/trove/trove-docker"><img src="https://agentmods.dev/badge/skills/bravew/trove/trove-docker.svg" alt="Measured on agentmods" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 414 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00021 $0.00414
Opus 5 $0.00010 $0.00207
Sonnet 5 $0.00004 $0.00083
Haiku 4.5 $0.00002 $0.00041

Measured 5d ago against content hash 3601a6fd657f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

trove-docker scanned grade A with 0 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 5d ago.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/trove-infra/.agents/skills/trove-docker/SKILL.md · 65 lines

What it actually says

Trove · v2026.7.4

Session Init

This skill ships Trove conventions. Prefer existing project patterns over generic best practices when they conflict.

Docker Conventions

Dockerfile Best Practices

# Use specific version tags, not :latest
FROM python:3.13-slim AS base

# Set working directory early
WORKDIR /app

# Copy dependency files first (cache layer)
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy application code last (changes most often)
COPY . .

# Run as non-root user
RUN adduser --disabled-password --gecos '' appuser
USER appuser

EXPOSE 8000
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]

Multi-Stage Builds

Use multi-stage builds to reduce image size:

FROM node:22-alpine AS builder
WORKDIR /app
COPY package.json pnpm-lock.yaml ./
RUN pnpm install --frozen-lockfile
COPY . .
RUN pnpm build

FROM nginx:alpine
COPY --from=builder /app/dist /usr/share/nginx/html

AI Gotchas

  • Layer caching: Order instructions from least to most frequently changing
  • COPY vs ADD: Use COPY unless you need URL download or tar extraction
  • HEALTHCHECK: Always include for production images
  • .dockerignore: Exclude node_modules, .git, .env, test files
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. 5d ago First seen · 65 lines · 21 tokens per session scan A 3601a6fd657f

Subscribe to this mod's changes

trove-docker is a skill published in the GitHub repository bravew/trove (10 stars, last pushed 6d ago), licensed MIT. It adds 21 tokens to every session and 414 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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