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portals-web-games

portals-web-games is a skill for Claude Code from portals-labs/portals-plugin-claude. It costs 110 tokens per session (2,432 once invoked), scanned A, original, ISC.

A toolkit for building and managing browser games hosted on Portals, including their source code, platform features, and publishing.

In plain words
What is it for?
Use it to create, update, synchronize, configure, test, and publish Portals games, including features such as player identity, saved progress, leaderboards, multiplayer, voice, avatars, and in-game Coins.
Why use it?
It gives the coding agent the platform-specific instructions and tools needed to work with Portals game projects instead of treating them like ordinary websites.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the portals-plugin-claude plugin — 8 skills, 1 MCP server shipped together

not rated 4repo 3d ago A scan 110 tokens original ISC

Good fit Use it to create, update, synchronize, configure, test, and publish Portals games, including features such as player identity, saved progress, leaderboards, multiplayer, voice, avatars, and in-game Coins.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/portals-labs/portals-plugin-claude/portals-web-games
View source ↗ portals-labs/portals-plugin-claude
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.

Any agent
npx skills add portals-labs/portals-plugin-claude --skill portals-web-games
Clone the repo
git clone --depth 1 https://github.com/portals-labs/portals-plugin-claude

Made for: Claude Code.

Or install portals-plugin-claude, the plugin that ships this one along with the rest of its 8 skills, 1 MCP server.

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 portals-web-games

README.md
[![agentmods](https://agentmods.dev/badge/skills/portals-labs/portals-plugin-claude/portals-web-games/github.svg)](https://agentmods.dev/skills/portals-labs/portals-plugin-claude/portals-web-games)
Your own site
<a href="https://agentmods.dev/skills/portals-labs/portals-plugin-claude/portals-web-games"><img src="https://agentmods.dev/badge/skills/portals-labs/portals-plugin-claude/portals-web-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.

agentmods 80×15 button for portals-web-games

Your own site · 80×15
<a href="https://agentmods.dev/skills/portals-labs/portals-plugin-claude/portals-web-games"><img src="https://agentmods.dev/badge/skills/portals-labs/portals-plugin-claude/portals-web-games.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 110 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,432 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00110 $0.02432
Opus 5 $0.00055 $0.01216
Sonnet 5 $0.00022 $0.00486
Haiku 4.5 $0.00011 $0.00243

Measured 12d ago against content hash eb192eb8ddea, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

portals-web-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 12d 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/portals-plugin-claude/skills/portals-web-games/SKILL.md · 105 lines

How it starts

The opening of the file, as written. The whole thing — 105 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Portals Web Games

Use the portals-web-games MCP tools for remote Portals state and ordinary workspace tools for local source files.

Load the platform rules

Before creating or changing a game, read references/portals-web-games.md completely. Treat it as authoritative for the injected SDK, host-owned UI reserve, Coin products, sandbox restrictions, multiplayer and voice limits, Guardian avatar integration, local development, and generated-asset rules. Those instructions are bundled from this MCP project's src/instructions.ts.

For the full official documentation on one subsystem, use the dedicated skill instead of guessing at the API:

  • portals-sdk — identity, saved progress, casual scores, leaderboards, host context.
  • portals-multiplayer-and-voice — Portals.net sessions and channels, text chat, Portals.voice, dev-token local testing.
  • portals-server-scripts — a root server.js referee for lobbies, ready checks, authoritative countdowns, and kicking.
  • portals-server-sim — running the game simulation itself on the server: shared physics, snapshots, client prediction, and fallback to host authority.
  • portals-guardian-avatars — Guardian avatars, wearables, animation, and the character controller in Three.js.
  • portals-game-economy — selling in-game products for Coins: the product catalog, Portals.economy purchases, and the purchase sandbox.

Choose the workflow

Existing game

  1. Call list_web_games to resolve the game and confirm its current state.
  2. Pull with pull_web_game_source before editing unless the user explicitly wants to replace the remote source.
  3. Use a dedicated game directory. A pull overwrites matching project files, so never target an unrelated repository root or a directory whose ownership is unclear.
  4. Preserve the returned revision and pass it as expectedRevision to push_web_game_source. If the server reports PROJECT_CHANGED, stop and reconcile instead of overwriting newer edits.
  5. Inspect and test the local build, then push the directory containing index.html at its root. Pass the optional tag when the user named a label for the push.

Read the full file on GitHub · 105 lines

Files

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.

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. 12d ago First seen · 105 lines · 110 tokens per session scan A eb192eb8ddea

Subscribe to this mod's changes

portals-web-games is a skill published in the GitHub repository portals-labs/portals-plugin-claude (4 stars, last pushed 3d ago), licensed ISC. It adds 110 tokens to every session and 2,432 once invoked, about $0.0006 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 2026-08-31.

Browser automationGame development
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