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Agent skill

Pp Art Goat

by mvanhorn in mvanhorn/printing-press-library

OmniMuseum aggregator for a daily contemplative art practice — eight open-access museum and astronomy APIs as one local corpus.

Apache-2.0Auto-check: notesResearch & Science

Install Pp Art Goat

skills CLI
$ npx skills add mvanhorn/printing-press-library --skill pp-art-goat -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mvanhorn/printing-press-library pp-art-goat --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mvanhorn/printing-press-library.git skills-src && mkdir -p .claude/skills && cp -r skills-src/cli-skills/pp-art-goat .claude/skills/pp-art-goat && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
pp-art-goat
GitHub stars
2.1k
Token cost
~3.3k tokens
SKILL.md length
1,420 words
Files
1
Skills in repo
506
Repo updated
First seen
Licence
Apache-2.0

At a glance

OmniMuseum aggregator for a daily contemplative art practice — eight open-access museum and astronomy APIs as one local corpus.

  • Works in 3 steps: Install via the Printing Press… → Verify: art-goat-pp-cli --version → Ensure the reported install directory is…
  • Phrases: sit with a piece of art
  • SKILL.md covers Prerequisites: Install the CLI, When to Use This CLI, When Not to Use This CLI and Unique Capabilities, plus 9 more sections
  • Calls claude, npx and go; needs DEMO_KEY and NASA_API_KEY

What it does

Pp Art Goat is an agent skill from mvanhorn/printing-press-library. OmniMuseum aggregator for a daily contemplative art practice — eight open-access museum and astronomy APIs as one local corpus. Trigger phrases: sit with a piece of art, today's piece of art, what's APOD, browse art collections, museum aggregator, open access art practice, 8-source contemplative tool, art journal stats, walk a theme across museums, journal compare sits, revisit a past sit, bridge from last sit mood, artist arc across sources, use art-goat, run art-goat.

Its SKILL.md is about 3.3k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Research & Science, covering Physical and earth sciences. The repository describes itself as: Official library of CLIs generated by the CLI Printing Press. Endorsed, tested, and community-contributed. The licence is Apache-2.0.

When your agent uses it

  • Phrases: sit with a piece of art
  • Todays piece of art
  • Browse art collections
  • Museum aggregator

Example prompts

  • “s piece of art, what”
  • “/pp-art-goat”

Requirements

  • Node.js
  • A credential in DEMO_KEY
  • A credential in NASA_API_KEY
  • Pre-approved tools (allowed-tools): Read, Bash

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Install via the Printing Press installer. It defaults binaries to $HOME/.local/bin on macOS/Linux and…
  2. Verify: art-goat-pp-cli --version
  3. Ensure the reported install directory is on $PATH for the agent/runtime that will invoke this skill.

What it can do on your machine

Read from SKILL.md and the folder at commit d9a1696. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Bash

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • claude
    • npx
    • go

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use npx, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • DEMO_KEY
    • NASA_API_KEY
    • SMITHSONIAN_API_KEY
    • ART_GOAT_API_KEY
    • RIJKSMUSEUM_API_KEY
    • ART_GOAT_RIJKS_KEY
    • TEPAPA_API_KEY
    • ART_GOAT_TEPAPA_KEY

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Pp Art Goat loads about 3.3k tokens when it runs. Until then it costs about 129 tokens; SKILL.md has 1,420 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~129
When it runs · the whole SKILL.md, loaded when a task matches
~3.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
    allowed-tools: Read, Bash

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from mvanhorn/printing-press-library at commit d9a1696, republished under its Apache-2.0 licence (© mvanhorn). 1,420 words, ~3,265 tokens.

Download SKILL.mdSave it as .claude/skills/pp-art-goat/SKILL.md (or your agent's skills folder).
name
pp-art-goat
description
OmniMuseum aggregator for a daily contemplative art practice — eight open-access museum and astronomy APIs as one local corpus. Trigger phrases: `sit with a piece of art`, `today's piece of art`, `what's APOD`, `browse art collections`, `museum aggregator`, `open access art practice`, `8-source contemplative tool`, `art journal stats`, `walk a theme across museums`, `journal compare sits`, `revisit a past sit`, `bridge from last sit mood`, `artist arc across sources`, `use art-goat`, `run art-goat`.
allowed-tools
Read, Bash
author
justinwfu
license
Apache-2.0
argument-hint
<command> [args] | install cli|mcp
<!-- GENERATED FILE — DO NOT EDIT.
     This file is a verbatim mirror of library/media-and-entertainment/art-goat/SKILL.md,
     regenerated post-merge by tools/generate-skills/. Hand-edits here are
     silently overwritten on the next regen. Edit the library/ source instead.
     See the repository agent guide, section "Generated artifacts: registry.json, cli-skills/". -->

art-goat — Printing Press CLI

Prerequisites: Install the CLI

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

  1. Install via the Printing Press installer. It defaults binaries to $HOME/.local/bin on macOS/Linux and %LOCALAPPDATA%\Programs\PrintingPress\bin on Windows:
    bash
    npx -y @mvanhorn/printing-press-library install art-goat --cli-only
  2. Verify: art-goat-pp-cli --version
  3. 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):

bash
go install github.com/mvanhorn/printing-press-library/library/media-and-entertainment/art-goat/cmd/art-goat-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 to Use This CLI

Use art-goat when you want a daily contemplative practice grounded in real museum and astronomy collections. It's the right choice when one piece of extended attention is more useful than skimming a feed of fifty. It's not the right choice for shopping for art, building a catalog, or doing research that needs the museum's full canonical metadata in raw form — for that, use the AIC API directly.

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.

Unique Capabilities

These capabilities aren't available in any other tool for this API.

Contemplative practice

  • sit — Sit with one piece of art for a fixed period. Opens the image in your browser, shows the curator's description, runs a quiet timer, and captures your reflection in the journal.

    Use this when you want to spend deliberate time with one piece instead of skimming a feed. The reflection is persisted locally for later search.

    bash
    art-goat-pp-cli sit --duration 10 --dry-run

  • today — Today's curated piece, chosen using anti-repeat against your sits and journal-aware diversity against your recent medium and culture choices. Includes a one-line 'why this today'.

    Use today as the default daily entry point. It avoids showing you what you already sat with and rotates against your recent medium and region choices.

    bash
    art-goat-pp-cli today
Practice journal

  • journal stats — Practice statistics emphasising source breadth, medium variety, region coverage, and mood drift, with streak available at the bottom labeled 'if you want to know'.

    Use this to see breadth instead of streak length. Practice quality is captured as how widely you've ranged, not how many days in a row you've sat.

    bash
    art-goat-pp-cli journal stats

  • journal search — FTS5 over your reflection history. Surfaces every past sit whose text matches the query.

    Use this to find prior reflections by token. Years of practice become queryable.

    bash
    art-goat-pp-cli journal search "solitude"

Command Reference

planetary — Manage planetary

  • art-goat-pp-cli planetary — Fetch the Astronomy Picture of the Day for a given date or date range. Anonymous via DEMO_KEY.
Finding the right command

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

bash
art-goat-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.

Recipes

Start a daily practice
bash
art-goat-pp-cli sources sync && art-goat-pp-cli today

Populate the store, then enter today's curated practice in a single line.

Sit with a specific piece
bash
art-goat-pp-cli sit aic:24645 --duration 10

Pull AIC's Hokusai 'Under the Wave off Kanagawa' for a ten-minute sit.

Look back on reflections
bash
art-goat-pp-cli journal search "water" --json --select started_at,work_id,reflection

Find every past sit where you wrote about water. JSON output piped through select keeps the response narrow.

Step laterally across sources
bash
art-goat-pp-cli similar aic:24645 --json --select source,title,creator

Surface other works in the corpus that share medium, period, region, or creator with a seed. Useful for letting one piece point you to neighboring ones across museums.

Find all works by an artist
bash
art-goat-pp-cli artist "van gogh" --json --select id,title,date

Federated substring match on the canonical creator field, chronological.

Read a creator's career arc across museums
bash
art-goat-pp-cli artist "hokusai" --arc

Groups works into stylistic periods using date_start + the period field where available and renders a 5-line career narrative. Plays to the federated corpus — pulling a creator across museums gives a richer arc than any one museum's holdings.

Walk a theme through the corpus
bash
art-goat-pp-cli path --theme "impermanence"
art-goat-pp-cli path --theme "stillness" --steps 7 --json

FTS5 search across title/medium/period/region/creator/description, returned as a diversity-ordered walk. --steps controls walk length (default 5). Print only — no journal writes.

Bridge from your last sit's mood
bash
art-goat-pp-cli today --mode bridge-from-last

Reads the last sit's mood (1–5 scale) from the journal and picks toward the opposite half — heavy → calmer, calm → energizing. Falls back to default rotation if no prior sit. Useful for a contemplative practice that rotates energy across days, not just visual variety.

Compare two sits
bash
art-goat-pp-cli journal compare 12 47

Side-by-side: each sit's work, prompt, reflection, mood, and tags. Turns the journal from a flat list into a longitudinal log.

Revisit a past sit
bash
art-goat-pp-cli journal revisit --age 1y
art-goat-pp-cli journal revisit --age 6mo --json

Surfaces the sit closest to today - <age> within a ±7 day window. Supports Nd, Nw, Nmo, Ny. "What was I noticing this day a year ago" — a tiny addition with outsized practice value.

Quick contemplative pulse without a timer
bash
art-goat-pp-cli presence --source met

Random piece + prompt, no timer, no journal write. Drop-in for a 30-second pause without committing to a full sit.

Show full SKILL.md (594 more words)Show less
Export practice to Markdown
bash
ART_GOAT_JOURNAL_PATH=~/Obsidian/art-goat art-goat-pp-cli journal export

Mirror the journal to your Obsidian vault. SQLite stays canonical for queries; the Markdown files are tool-agnostic.

Auth Setup

Anonymous out of the box for aic, met, cleveland, and npmtw. NASA APOD and Smithsonian Open Access work via DEMO_KEY (~30 req/hr ceiling); upgrade with NASA_API_KEY / SMITHSONIAN_API_KEY / ART_GOAT_API_KEY. Rijksmuseum and Te Papa require free signup keys: RIJKSMUSEUM_API_KEY (or ART_GOAT_RIJKS_KEY) and TEPAPA_API_KEY (or ART_GOAT_TEPAPA_KEY). The CLI surfaces the exact env var in its error when a key is missing.

Run art-goat-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:

    bash
    art-goat-pp-cli planetary --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:

json
{
  "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:

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

Entries are stored locally at ~/.art-goat-pp-cli/feedback.jsonl. They are never POSTed unless ART_GOAT_FEEDBACK_ENDPOINT is set AND either --send is passed or ART_GOAT_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:

SinkEffect
stdoutDefault; 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.

art-goat-pp-cli profile save briefing --json
art-goat-pp-cli --profile briefing planetary
art-goat-pp-cli profile list --json
art-goat-pp-cli profile show briefing
art-goat-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

CodeMeaning
0Success
2Usage error (wrong arguments)
3Resource not found
4Authentication required
5API error (upstream issue)
7Rate limited (wait and retry)
10Config error

Argument Parsing

Parse $ARGUMENTS:

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

MCP Server Installation

Install the MCP binary from this CLI's published public-library entry or pre-built release, then register it:

bash
claude mcp add art-goat-pp-mcp -- art-goat-pp-mcp

Verify: claude mcp list

Direct Use

  1. Check if installed: which art-goat-pp-cli If not found, offer to install (see Prerequisites at the top of this skill).
  2. Match the user query to the best command from the Unique Capabilities and Command Reference above.
  3. Execute with the --agent flag:
    bash
    art-goat-pp-cli <command> [subcommand] [args] --agent
  4. If ambiguous, drill into subcommand help: art-goat-pp-cli <command> --help.

© mvanhorn, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in cli-skills/pp-art-goat of mvanhorn/printing-press-library.

Open the folder on GitHubat commit d9a1696

Compare with similar skills

Pp Art Goat next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

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Categories

Questions about Pp Art Goat

What does Pp Art Goat do?

OmniMuseum aggregator for a daily contemplative art practice — eight open-access museum and astronomy APIs as one local corpus. Pp Art Goat is an agent skill from mvanhorn/printing-press-library. OmniMuseum aggregator for a daily contemplative art practice — eight open-access museum and astronomy APIs as one local corpus.

When should I use Pp Art Goat?

Pp Art Goat fits situations like: phrases: sit with a piece of art; todays piece of art; browse art collections; museum aggregator.

How do I install Pp Art Goat in Claude Code?

Run `npx skills add mvanhorn/printing-press-library --skill pp-art-goat -a claude-code`. Or copy the skill folder (cli-skills/pp-art-goat in mvanhorn/printing-press-library) into .claude/skills/pp-art-goat in your project. Claude Code loads it when a task matches its description.

How do I install Pp Art Goat in Codex?

Run `npx skills add mvanhorn/printing-press-library --skill pp-art-goat -a codex`. Or copy the skill folder (cli-skills/pp-art-goat in mvanhorn/printing-press-library) into .agents/skills/pp-art-goat in your project. Codex loads it when a task matches its description.

Can I use Pp Art Goat in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mvanhorn/printing-press-library --skill pp-art-goat -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/pp-art-goat, .gemini/skills/pp-art-goat, .github/skills/pp-art-goat and .opencode/skills/pp-art-goat in your project.

What does Pp Art Goat need to run?

Going by SKILL.md and its folder, Pp Art Goat needs the command-line tools its instructions call (claude, npx and go) and credentials named DEMO_KEY, NASA_API_KEY, SMITHSONIAN_API_KEY and ART_GOAT_API_KEY. Our summary lists: Node.js; A credential in DEMO_KEY; A credential in NASA_API_KEY. Its frontmatter pre-approves these tools: Read, Bash.

Does Pp Art Goat access the network?

SKILL.md contains no URLs. Its commands use npx, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Pp Art Goat safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Pp Art Goat use?

Pp Art Goat is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Pp Art Goat use?

About 3.3k tokens (SKILL.md is roughly 13k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Pp Art Goat?

Skills that share tags, products or a category with Pp Art Goat: Astropy (zLanqing/codex-claude-academic-skills, 4.7k stars), Pymatgen (zLanqing/codex-claude-academic-skills, 4.7k stars), Cantera Ignition Delay (K-Dense-AI/scientific-agent-skills, 48k stars) and Weather (trpc-group/trpc-agent-go, 1.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Pp Art Goat?

mvanhorn (a GitHub user) maintains it in mvanhorn/printing-press-library, which has 2,056 GitHub stars. The repository holds 506 skills in this directory. The repository was last updated on October 9, 2026.

Source: mvanhorn/printing-press-library on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.