pp-docker-hub

Q: How do I install pp-docker-hub?

Run npx skills add https://github.com/mvanhorn/printing-press-library --skill pp-docker-hub in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/pp-docker-hub/ (personal) or .claude/skills/pp-docker-hub/ (project).

by mvanhornDevOps & Cloud

Printing Press CLI for Docker Hub. Docker Hub public API. Search container images, browse tags, check sizes, inspect Dockerfiles, and explore the...

Installs: 286
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Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/mvanhorn/printing-press-library --skill pp-docker-hub

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads pp-docker-hub automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Docker Hub — Printing Press CLI

Prerequisites: Install the CLI

This skill drives the docker-hub-pp-cli binary. You must verify the CLI is installed before invoking any command from this skill. If it is missing, install it first:

Install via the Printing Press installer. It defaults binaries to $HOME/.local/bin on macOS/Linux and %LOCALAPPDATA%\Programs\PrintingPress\bin on Windows:
```
npx -y @mvanhorn/printing-press-library install docker-hub --cli-only
```
Verify: docker-hub-pp-cli --version
Ensure the reported install directory is on $PATH for the agent/runtime that will invoke this skill.

If the npx install fails (no Node, offline, etc.), fall back to a direct Go install (requires Go 1.26.6 or newer):

go install github.com/mvanhorn/printing-press-library/library/developer-tools/docker-hub/cmd/docker-hub-pp-cli@latest

If --version reports "command not found" after install, the runtime cannot see the binary directory on $PATH. Do not proceed with skill commands until verification succeeds.

When Not to Use This CLI

Do not activate this CLI for requests that require creating, updating, deleting, publishing, commenting, upvoting, inviting, ordering, sending messages, booking, purchasing, or changing remote state. This printed CLI exposes read-only commands for inspection, export, sync, and analysis.

Command Reference

docker-hub-search — Manage docker hub search

docker-hub-pp-cli docker-hub-search — Full-text search across all Docker Hub repositories. Returns name, description, stars, and pull counts.

repositories — Repository metadata and details

docker-hub-pp-cli repositories <namespace> <repository> — Full metadata for a Docker Hub repository including pull count, stars, description, and last update time.

Finding the right command

When you know what you want to do but not which command does it, ask the CLI directly:

docker-hub-pp-cli which "<capability in your own words>"

which resolves a natural-language capability query to the best matching command from this CLI's curated feature index. Exit code 0 means at least one match; exit code 2 means no confident match — fall back to --help or use a narrower query.

Auth Setup

No authentication required.

Run docker-hub-pp-cli doctor to verify setup.

Agent Mode

Add --agent to any command. Expands to: --json --compact --no-input --no-color --yes.

Pipeable — JSON on stdout, errors on stderr
Filterable — --select keeps a subset of fields. Dotted paths descend into nested structures; arrays traverse element-wise. Critical for keeping context small on verbose APIs:
```
docker-hub-pp-cli docker-hub-search --agent --select id,name,status
```
Previewable — --dry-run shows the request without sending
Offline-friendly — sync/search commands can use the local SQLite store when available
Non-interactive — never prompts, every input is a flag
Read-only — do not use this CLI for create, update, delete, publish, comment, upvote, invite, order, send, or other mutating requests

Response envelope

Commands that read from the local store or the API wrap output in a provenance envelope:

{
  "meta": {"source": "live" | "local", "synced_at": "...", "reason": "..."},
  "results": <data>
}

Parse .results for data and .meta.source to know whether it's live or local. A human-readable N results (live) summary is printed to stderr only when stdout is a terminal — piped/agent consumers get pure JSON on stdout.

Agent Feedback

When you (or the agent) notice something off about this CLI, record it:

docker-hub-pp-cli feedback "the --since flag is inclusive but docs say exclusive"
docker-hub-pp-cli feedback --stdin < notes.txt
docker-hub-pp-cli feedback list --json --limit 10

Entries are stored locally at ~/.docker-hub-pp-cli/feedback.jsonl. They are never POSTed unless DOCKER_HUB_FEEDBACK_ENDPOINT is set AND either --send is passed or DOCKER_HUB_FEEDBACK_AUTO_SEND=true. Default behavior is local-only.

Write what surprised you, not a bug report. Short, specific, one line: that is the part that compounds.

Output Delivery

Every command accepts --deliver <sink>. The output goes to the named sink in addition to (or instead of) stdout, so agents can route command results without hand-piping. Three sinks are supported:

Sink	Effect
`stdout`	Default; write to stdout only
`file:<path>`	Atomically write output to `<path>` (tmp + rename)
`webhook:<url>`	POST the output body to the URL (`application/json` or `application/x-ndjson` when `--compact`)

Unknown schemes are refused with a structured error naming the supported set. Webhook failures return non-zero and log the URL + HTTP status on stderr.

Named Profiles

A profile is a saved set of flag values, reused across invocations. Use it when a scheduled agent calls the same command every run with the same configuration - HeyGen's "Beacon" pattern.

docker-hub-pp-cli profile save briefing --json
docker-hub-pp-cli --profile briefing docker-hub-search
docker-hub-pp-cli profile list --json
docker-hub-pp-cli profile show briefing
docker-hub-pp-cli profile delete briefing --yes

Explicit flags always win over profile values; profile values win over defaults. agent-context lists all available profiles under available_profiles so introspecting agents discover them at runtime.

Exit Codes

Code	Meaning
0	Success
2	Usage error (wrong arguments)
3	Resource not found
5	API error (upstream issue)
7	Rate limited (wait and retry)
10	Config error

Argument Parsing

Parse $ARGUMENTS:

Empty, help, or --help → show docker-hub-pp-cli --help output
Starts with install → ends with mcp → MCP installation; otherwise → see Prerequisites above
Anything else → Direct Use (execute as CLI command with --agent)

MCP Server Installation

Install the MCP server:

go install github.com/mvanhorn/printing-press-library/library/other/docker-hub-pp-cli/cmd/docker-hub-pp-mcp@latest

claude mcp add docker-hub-pp-mcp -- docker-hub-pp-mcp

Verify: claude mcp list

Direct Use

Check if installed: which docker-hub-pp-cli If not found, offer to install (see Prerequisites at the top of this skill).
Match the user query to the best command from the Unique Capabilities and Command Reference above.

Execute with the --agent flag:

docker-hub-pp-cli <command> [subcommand] [args] --agent

If ambiguous, drill into subcommand help: docker-hub-pp-cli <command> --help.

FAQ

What does the pp-docker-hub skill do?

Printing Press CLI for Docker Hub. Docker Hub public API. Search container images, browse tags, check sizes, inspect Dockerfiles, and explore the...

How do I install pp-docker-hub?

Run npx skills add https://github.com/mvanhorn/printing-press-library --skill pp-docker-hub in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/pp-docker-hub/ (personal) or .claude/skills/pp-docker-hub/ (project).

Which AI agents can use pp-docker-hub?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is pp-docker-hub safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains pp-docker-hub?

It is published by mvanhorn in mvanhorn/printing-press-library. It has 286 recorded installs.