World of ClaudeCraft is a browser-based classic-style multiplayer online game with a persistent shared world that can also run locally or be controlled through a Python reinforcement-learning interface. Players can quest and raid in the online world, while developers can host it themselves and train AI agents to play. The catalogue skills, agents, instructions, hooks, and setting support workflows for interacting with and developing the game.
Borrowing it
Nothing to install: this file belongs to levy-street/world-of-claudecraft. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/levy-street/world-of-claudecraft/main/.agents/skills/woc-feature-plan/SKILL.mdgit clone --depth 1 https://github.com/levy-street/world-of-claudecraftWrote 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.
[](https://agentmods.dev/skills/levy-street/world-of-claudecraft/woc-feature-plan)<a href="https://agentmods.dev/skills/levy-street/world-of-claudecraft/woc-feature-plan"><img src="https://agentmods.dev/badge/skills/levy-street/world-of-claudecraft/woc-feature-plan/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/levy-street/world-of-claudecraft/woc-feature-plan"><img src="https://agentmods.dev/badge/skills/levy-street/world-of-claudecraft/woc-feature-plan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00055 | $0.00623 |
| Opus 5 | $0.00028 | $0.00311 |
| Sonnet 5 | $0.00011 | $0.00125 |
| Haiku 4.5 | $0.00006 | $0.00062 |
Grade A, and why
woc-feature-plan 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 13d 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.
How it starts
The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Feature Plan
Create the smallest planning artifact that makes a large feature safe to execute across sessions.
Research before planning
- Read the root and relevant local
CLAUDE.mdfiles. - Run
git status --shortand preserve unrelated work. - Inspect production paths, tests, module seams, and relevant project documentation.
- Use bounded parallel exploration for independent subsystems.
- Fetch current official documentation for version-sensitive external interfaces.
- When work adds or changes SQL, a database call site, stored-data growth, scheduled database
work, pool sizing or admission, transaction or lock scope, or timeout policy; a database
driver/dependency version, or PostgreSQL engine/resource/configuration/topology, use
woc_database_performancefor a read-only scaling pass.
Do not create planning files until the goal, scope, and important constraints are understood. Ask the user when a choice would materially change architecture or product behavior.
Define the change
Record current behavior and ownership, desired behavior and acceptance criteria, affected systems and platforms, constraining invariants, decisions already made, truly blocking open decisions, and compatibility, migration, localization, privacy, security, database performance, and testing implications. For database-backed work, record expected query frequency and cardinality, the index/cache/pagination strategy, pool and lock impact, version-sensitive timeout/planner assumptions, and the measured evidence the implementation must produce. Reference canonical instructions instead of copying them.
Build vertical phases
Prefer phases that deliver a testable behavior slice. Each phase states:
- Outcome and explicit scope.
- Expected modules or seams.
- Tests to add or update.
- Validation commands and manual verification.
- Exit criteria.
- State needed by the next phase.
Keep a phase small enough for one focused session when practical. Do not isolate documentation that belongs beside its implementation.
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.
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.
- 13d ago First seen · 68 lines · 55 tokens per session scan A 3c75c0ea336e
woc-feature-plan is a skill published in the GitHub repository levy-street/world-of-claudecraft (2,251 stars, last pushed yesterday), licensed MIT. It adds 55 tokens to every session and 623 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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