Borrowing it
Nothing to install: this file belongs to wfbcargo/wfbcargo_spawn_mcp. 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/wfbcargo/wfbcargo_spawn_mcp/main/.claude/skills/drop-in-games/SKILL.mdgit clone --depth 1 https://github.com/wfbcargo/wfbcargo_spawn_mcpWrote 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/wfbcargo/wfbcargo_spawn_mcp/drop-in-games)<a href="https://agentmods.dev/skills/wfbcargo/wfbcargo_spawn_mcp/drop-in-games"><img src="https://agentmods.dev/badge/skills/wfbcargo/wfbcargo_spawn_mcp/drop-in-games/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/wfbcargo/wfbcargo_spawn_mcp/drop-in-games"><img src="https://agentmods.dev/badge/skills/wfbcargo/wfbcargo_spawn_mcp/drop-in-games.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00166 | $0.03307 |
| Opus 5.5 | $0.00066 | $0.01323 |
| Sonnet 5.5 | $0.00033 | $0.00661 |
| Haiku 4.5 | $0.00017 | $0.00331 |
Grade A, and why
drop-in-games 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 1mo 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 — 172 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Drop-in games on Spawn
A drop-in game is one a stranger clicks into, understands by doing, plays for two minutes or twenty, walks out of through a portal with their friends, and returns to without having lost anything. It is the shape of most breakout games on community platforms, and it is the shape that suits Spawn: a weekly jam judged in the first few minutes of play, worlds joined from a link on a phone, and a social layer — chat, parties, portals — that moves groups from game to game.
This is a lens, not a genre and not a rule. Creators build what they want. Use this skill to choose a concept when nobody has, and otherwise to find the drop-in version of what the creator asked for: a sprawling RPG still benefits from a playable first ten seconds and from not losing progress on a closed tab.
The social baseline (Spawn owns chat; parties stay together; every game has a door out) is
not part of this optional lens — it applies to every game and is in spawn_getting_started.
This skill assumes it and builds on it.
The shape, in six tests
A concept passes when every answer is yes. Ask them before the first file, and again at review.
| # | Test | Passes when | Fails when |
|---|---|---|---|
| 1 | Acts in 3 seconds | Arrival puts a body in the world with the core verb usable; the game explains itself by being played within 30 s | Title screen, "press start", a menu, a text tutorial, a wait for other players |
| 2 | One verb, one space | The whole game is one sentence ("tag the others before the lava rises") in one room-sized area the camera can hold | Several systems to learn, a map that needs travel or a minimap |
| 3 | Joins any time | A player arriving mid-round plays at once or watches from a safe spot with a visible "next round in N s" | Late joiners locked out, or dropped into a running match mid-danger |
| 4 | Leaves any time | A leaver costs nobody their round and loses nothing earned; returning shows their progress, grown if time passed | A round that stalls on a missing player; progress that lived only in memory |
| 5 | Solo-viable, better together | One player has a real game (score chase, ghost, simple rule-driven hazards); goals scale with headcount; friends change it | "Waiting for 4 players"; a multiplayer game where players never have to notice each other |
| 6 | Cheap to run | Timers, discrete events, and state written when it changes; any "enemy" is a rule or a timer | Swarms of pathfinding AI, synced rigid-body piles, per-tick writes, per-tick SQL |
What ships with it
2 files 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.
- 1mo ago First seen · 172 lines · 166 tokens per session scan A 6a10168ae5f1
drop-in-games is a skill published in the GitHub repository wfbcargo/wfbcargo_spawn_mcp (3 stars, last pushed 1mo ago), licensed MIT. It adds 166 tokens to every session and 3,307 once invoked, about $0.0007 per session on Opus 5.5. 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 2026-09-14.
drop-in-games compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| drop-in-gameswfbcargo/wfbcargo_spawn_mcp | Skill | 3 | 1mo ago | MIT | A | 166 | Claude Code |
| playtest-reportDonchitos/Claude-Code-Game-Studios | Skill | 37k | 20d ago | MIT | A | 20 | Claude Code |
| godot-signals-groupsgamedev-skills/awesome-gamedev-agent-skills | Skill | 7.4k | 11d ago | Apache-2.0 | A | 95 | Claude Code |
| texture-workflowarjun988/blender-skills | Skill | 2.0k | 2d ago | MIT | A | 41 | Claude Code |
| scenario-unreal-gameplayscenario-labs/skills | Skill | 3.5k | yesterday | MIT | A | 121 | Claude Code |
| motionOpenDCAI/GameFactory-3A | Skill | 1.0k | 10d ago | Apache-2.0 | A | 0 | Claude Code, Codex |
| unity-addressablesBesty0728/Unity-Skills | Skill | 1.9k | today | MIT | A | 25 | Claude Code, Codex |