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.
npx agentmods add skills/berkcangumusisik/claude-code-practices/docker-buildnpx skills add berkcangumusisik/claude-code-practices --skill docker-buildgit clone --depth 1 https://github.com/berkcangumusisik/claude-code-practicesWrote 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.
[](https://agentmods.dev/skills/berkcangumusisik/claude-code-practices/docker-build)<a href="https://agentmods.dev/skills/berkcangumusisik/claude-code-practices/docker-build"><img src="https://agentmods.dev/badge/skills/berkcangumusisik/claude-code-practices/docker-build.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00014 | $0.00316 |
| Opus 5 | $0.00007 | $0.00158 |
| Sonnet 5 | $0.00003 | $0.00063 |
| Haiku 4.5 | $0.00001 | $0.00032 |
Grade A, and why
docker-build 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 6d 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.
What it actually says
Docker Setup
- Detect project type:
cat package.json 2>/dev/null | grep '"main"\|"start"\|"scripts"' -A 5
ls -la | grep -E "Dockerfile|docker-compose|\.dockerignore"
-
If Dockerfile exists, review it for:
- Multi-stage build (build stage vs runtime stage)
- Layer caching order (dependencies before source)
- Running as non-root user
.dockerignorecompleteness- Image size optimization
-
If no Dockerfile, generate one following best practices:
# Multi-stage: build → runtime
FROM node:20-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production
FROM node:20-alpine AS runtime
RUN addgroup -S app && adduser -S app -G app
WORKDIR /app
COPY --from=builder /app/node_modules ./node_modules
COPY . .
USER app
EXPOSE 3000
CMD ["node", "dist/index.js"]
- Also create/update
.dockerignore:
node_modules
dist
.env*
.git
coverage
*.test.*
- Show
docker buildanddocker runcommands to test.
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.
- 6d ago First seen · 54 lines · 14 tokens per session scan A 6196962e9cc4
docker-build is a skill published in the GitHub repository berkcangumusisik/claude-code-practices (10 stars, last pushed 4mo ago), licensed MIT. It adds 14 tokens to every session and 316 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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