pp-marginalrevolution

name: pp-marginalrevolution description: "Marginal Revolution from your terminal via the public RSS feed. Trigger phrases: check marginal revolution, search marginal revolution, latest MR posts, marginal revolution links, use marginalrevolution, run marginalrevolution." author: "Nuri Chang" license: "Apache-2.0" argument-hint: " [args] | install cli|mcp" allowed-tools: "Read Bash" metadata: openclaw: requires: bins: - marginalrevolution-pp-cli

Marginal Revolution - Printing Press CLI

Prerequisites: Install the CLI

This skill drives the marginalrevolution-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:

   npx -y @mvanhorn/printing-press-library install marginalrevolution --cli-only
   

2. Verify: marginalrevolution-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 1.26.4 or newer):

go install github.com/mvanhorn/printing-press-library/library/media-and-entertainment/marginalrevolution/cmd/marginalrevolution-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 this CLI when you need current Marginal Revolution posts, categories, authors, comment counts, or cited outbound links without browser automation.

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

feed — Manage feed

• marginalrevolution-pp-cli feed — Returns the current public RSS feed. The feed is XML/RSS and does not require authentication.

RSS-native commands

• marginalrevolution-pp-cli latest --limit 10 --json - list recent posts
• marginalrevolution-pp-cli latest --author Tyler --category Economics - filter recent posts
• marginalrevolution-pp-cli search "ai" --agent - search current feed title/body/category text
• marginalrevolution-pp-cli read <url|guid|title> - read a current-feed post
• marginalrevolution-pp-cli links --limit 5 - extract outbound links from recent posts
• marginalrevolution-pp-cli categories - show category counts in the current feed
• marginalrevolution-pp-cli authors - show author counts in the current feed

Scope Notes

The public RSS feed is available to command-line clients. Marginal Revolution's WordPress JSON API and normal site-search URL returned Cloudflare browser challenges during implementation, so this CLI intentionally keeps search scoped to posts currently present in the feed.

Finding the right command

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

marginalrevolution-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 marginalrevolution-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:

  marginalrevolution-pp-cli feed --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:

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

Entries are stored locally at ~/.marginalrevolution-pp-cli/feedback.jsonl. They are never POSTed unless MARGINALREVOLUTION_FEEDBACK_ENDPOINT is set AND either --send is passed or MARGINALREVOLUTION_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:

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.

marginalrevolution-pp-cli profile save briefing --json
marginalrevolution-pp-cli --profile briefing feed
marginalrevolution-pp-cli profile list --json
marginalrevolution-pp-cli profile show briefing
marginalrevolution-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

Argument Parsing

Parse $ARGUMENTS:

1. Empty, help, or --help → show marginalrevolution-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:

claude mcp add marginalrevolution-pp-mcp -- marginalrevolution-pp-mcp

Verify: claude mcp list

Direct Use

1. Check if installed: which marginalrevolution-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:

   marginalrevolution-pp-cli <command> [subcommand] [args] --agent
   

4. If ambiguous, drill into subcommand help: marginalrevolution-pp-cli <command> --help.