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 skills add martian56/claude-engineer --skill docker-dev-environmentgit clone --depth 1 https://github.com/martian56/claude-engineerWrote 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/martian56/claude-engineer/docker-dev-environment)<a href="https://agentmods.dev/skills/martian56/claude-engineer/docker-dev-environment"><img src="https://agentmods.dev/badge/skills/martian56/claude-engineer/docker-dev-environment/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/martian56/claude-engineer/docker-dev-environment"><img src="https://agentmods.dev/badge/skills/martian56/claude-engineer/docker-dev-environment.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00046 | $0.00472 |
| Opus 5.5 | $0.00018 | $0.00189 |
| Sonnet 5.5 | $0.00009 | $0.00094 |
| Haiku 4.5 | $0.00005 | $0.00047 |
Grade A, and why
docker-dev-environment 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 1mo 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 Dev Environment
Announce at start: "I'm using claude-engineer:docker-dev-environment to run services in Docker and the app native."
Iron Law
Only stateful services run in Docker. The app (frontend + backend) runs NATIVELY in its own shell.
Rationale: instant uvicorn --reload / next dev / vite HMR, real debuggers, and CI/toolchain parity -
Docker handles only the painful-to-install backing services.
The baseline services (docker-compose.yml)
- PostgreSQL - primary DB (
localhost:5432). - Redis - cache, sessions, rate-limit, job broker (
localhost:6379). - MinIO - S3-compatible object storage (
localhost:9000API /9001console) + a bucket-bootstrap step. - Mailpit - email capture for signup/reset flows (
localhost:1025SMTP /8025UI). All with healthchecks and named volumes. The native app connects vialocalhostURLs in.env.
The dev flow
docker compose up -d(services only).- Backend in shell A:
uv run uvicorn ...(native). - Frontend in shell B:
pnpm dev/bun dev/vite(native).
Non-negotiables
- Never containerize the app for local dev (the guard hook will remind you).
- Healthchecks on every service; the app waits for healthy services.
- Secrets/connection strings via
.env(git-ignored), documented.
Full detail (the complete compose file, MinIO bucket bootstrap, Mailpit SMTP config, connection settings):
read references/dev-services.md on demand.
Red flags - STOP
docker compose upthat builds/starts the app itself for local dev.- Hardcoded service URLs instead of
.env. - A service with no healthcheck.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 1mo ago First seen · 39 lines · 46 tokens per session scan A 83041f2eaad0
docker-dev-environment is a skill published in the GitHub repository martian56/claude-engineer (2 stars, last pushed 4mo ago), licensed MIT. It adds 46 tokens to every session and 472 once invoked, about $0.0002 per session on Opus 5.5. 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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