generate-appworld-code

generate-appworld-code is a skill for Claude Code, Codex from jmanhype/claude-code-plugin-marketplace. It costs 50 tokens per session (1,375 once invoked), scanned A, original, MIT.

A code-writing guide for AppWorld tasks, an environment where an agent operates services such as Spotify, Venmo, Gmail, calendars and contacts through APIs. It turns a natural-language task and playbook advice into executable Python code.

In plain words
What is it for?
Use it to generate Python programs that search or update supported AppWorld services, apply given task-solving instructions, handle errors and signal when the task is finished.
Why use it?
It removes the need to manually translate each task into API calls and helps account for patterns such as logging in, handling pages of results and reporting completion.

Skill for Claude CodeCodex

Part of the ace-context-engineering plugin — 3 skills shipped together

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/jmanhype/claude-code-plugin-marketplace/generate-appworld-code
Any agent
npx skills add jmanhype/claude-code-plugin-marketplace --skill generate-appworld-code
Clone the repo
git clone --depth 1 https://github.com/jmanhype/claude-code-plugin-marketplace

Made for: Claude Code, Codex.

Or install ace-context-engineering, the plugin that ships this one along with the rest of its 3 skills.

Wrote 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.

agentmods badge for generate-appworld-code

README.md
[![agentmods](https://agentmods.dev/badge/skills/jmanhype/claude-code-plugin-marketplace/generate-appworld-code.svg)](https://agentmods.dev/skills/jmanhype/claude-code-plugin-marketplace/generate-appworld-code)
Your own site
<a href="https://agentmods.dev/skills/jmanhype/claude-code-plugin-marketplace/generate-appworld-code"><img src="https://agentmods.dev/badge/skills/jmanhype/claude-code-plugin-marketplace/generate-appworld-code.svg" alt="Measured on agentmods" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,375 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 5.1 $0.00050 $0.01375
Opus 5 $0.00025 $0.00687
Sonnet 5 $0.00010 $0.00275
Haiku 4.5 $0.00005 $0.00137

Measured 5d ago against content hash 61f0af645746, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

generate-appworld-code 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 5d 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.

plugins/ace-context-engineering/skills/generate-appworld-code/SKILL.md · 233 lines

How it starts

The opening of the file, as written. The whole thing — 233 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Generate AppWorld Code

Generate executable Python code for AppWorld agent tasks, applying learned strategies from the ACE playbook.

Purpose

When the AppWorld executor encounters a task, it calls this Skill with:

  • Task instruction (natural language)
  • Available apps (e.g., ['spotify', 'venmo'])
  • Playbook bullets (learned strategies to apply)

You generate Python code that:

  1. Solves the task using AppWorld APIs
  2. Applies bullet guidance strategies
  3. Handles errors gracefully
  4. Calls apis.supervisor.complete_task() when done

Input Format

{
  "instruction": "What is the title of the most-liked song in my Spotify playlists",
  "apps": ["spotify"],
  "strategies": [
    "Always login before API calls",
    "Handle pagination for large result sets"
  ],
  "bullets": [
    {
      "id": "bullet-xxx",
      "title": "Spotify login pattern",
      "content": "Login to Spotify using apis.spotify.login() with credentials..."
    }
  ]
}

AppWorld API Patterns

Spotify

# Login
response = apis.spotify.login(username="[email protected]", password="password")
token = response["access_token"]

# Get playlists
playlists = apis.spotify.show_playlist_library(access_token=token)

# Get songs in playlist
songs = apis.spotify.show_playlist_songs(
    access_token=token,
    playlist_id=playlists[0]["id"]
)

Venmo

# Login
response = apis.venmo.login(username="[email protected]", password="password")
token = response["access_token"]

# Get friends
friends = apis.venmo.show_friends(access_token=token)

# Send payment
apis.venmo.send_payment(
    access_token=token,
    recipient_id=friend["id"],
    amount=10.00,
    note="Payment note"
)

Gmail

# Login
response = apis.gmail.login(username="[email protected]", password="password")
token = response["access_token"]

# Fetch emails
emails = apis.gmail.fetch_emails(
    access_token=token,
    max_results=10,
    query="is:unread"
)

# Send email
apis.gmail.send_email(
    access_token=token,
    to="[email protected]",
    subject="Subject",
    body="Email body"
)

Read the full file on GitHub · 233 lines

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. 5d ago First seen · 233 lines · 50 tokens per session scan A 61f0af645746

Subscribe to this mod's changes

generate-appworld-code is a skill published in the GitHub repository jmanhype/claude-code-plugin-marketplace (27 stars, last pushed yesterday), licensed MIT. It adds 50 tokens to every session and 1,375 once invoked, about $0.0003 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 2026-08-30.

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