docker-disk-cleanup

A diagnostic workflow for finding what uses disk space in Docker, a tool for running software in isolated containers.

In plain words
What is it for?
Use it to inspect Docker storage, list unused resources, explain the space usage, and choose the smallest suitable cleanup action.
Why use it?
It shows whether images, stopped containers, volumes, or build cache are filling the disk before cleanup is considered.

Skill for Claude CodeCodex

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/agenticdevops/aoh/docker-disk-cleanup
Any agent
npx skills add agenticdevops/aoh --skill docker-disk-cleanup
Clone the repo
git clone --depth 1 https://github.com/agenticdevops/aoh

Made for: Claude Code, Codex.

Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 207 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 $0.00033 $0.00207
Opus 5 $0.00016 $0.00103
Sonnet 5 $0.00007 $0.00041
Haiku 4.5 $0.00003 $0.00021

Measured 2d ago against content hash dc3b0b96ec2e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

docker-disk-cleanup 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 2d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/inspect_docker_disk.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

collections/core/docker-disk-cleanup/skills/docker-disk-cleanup/SKILL.md · 33 lines

What it actually says

Docker Disk Cleanup

Overview

Diagnose Docker disk pressure before recommending cleanup. Prefer read-only inspection first and clearly separate safe recommendations from destructive commands.

Process

  1. Inspect Docker disk usage with docker system df.
  2. List stopped containers, dangling images, unused volumes, and builder cache.
  3. Explain what is consuming space.
  4. Recommend the smallest cleanup action that addresses the issue.
  5. Do not run destructive cleanup unless the active runtime explicitly supports approval and the user asks for it.

Helpful Commands

docker system df
docker ps -a --filter status=exited
docker images --filter dangling=true
docker volume ls
docker builder du

Deterministic Helper

Use scripts/inspect_docker_disk.sh when a repeatable read-only inspection is useful.

Files

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.

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. 2d ago First seen · 33 lines · 33 tokens per session scan A dc3b0b96ec2e

Subscribe to this mod's changes

docker-disk-cleanup is a skill published in the GitHub repository agenticdevops/aoh (5 stars, last pushed 1mo ago), licensed MIT. It adds 33 tokens to every session and 207 once invoked, about $0.0002 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.