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pantheon-ai/colyseus-multiplayer

Build authoritative real-time multiplayer servers with Colyseus 0.17+. Use when implementing rooms, schema state sync, client message validation, matchmaking, authentication, reconnection handling, or server-side anti-cheat constraints. Keywords: colyseus, room lifecycle, schema, multiplayer, websocket, matchmaking, onJoin, onLeave, onDrop, allowReconnection.

71

Quality

89%

Does it follow best practices?

Impact

No eval scenarios have been run

SecuritybySnyk

Passed

No known issues

Overview
Quality
Evals
Security
Files

Quality

Content

77%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is actionable and the workflow has explicit validation checkpoints, but it repeats the move-validation and reconnection code across the main example and anti-patterns, and its three referenced files are missing from the bundle.

Suggestions

Add the three referenced files under references/ (room-lifecycle-and-state.md, message-validation-and-security.md, matchmaking-and-reconnection.md) or remove the References section so Claude is not pointed at missing paths.

De-duplicate the movement-delta clamping and onLeave/allowReconnection code that appears in both the Room Implementation Example and the Anti-Patterns section to reduce token cost.

Consider moving the detailed Anti-Patterns into the message-validation-and-security reference to keep SKILL.md a lean overview.

DimensionReasoningScore

Conciseness

Mostly efficient and assumes Claude's competence, but the move-validation logic and the onLeave/allowReconnection pattern are each shown twice — once in the Room Implementation Example and again in the Anti-Patterns section — so not every token earns its place.

2 / 3

Actionability

Provides copy-paste-ready commands ('npm create colyseus-app@latest server', 'bun run src/index.ts') and a complete, executable TypeScript room example with concrete validation code, matching the score-3 anchor.

3 / 3

Workflow Clarity

The 'Deterministic Workflow' gives a clear 8-step sequence with two explicit '**Checkpoint:**' validation steps describing exactly what to verify, matching the score-3 anchor for sequenced validation with feedback loops.

3 / 3

Progressive Disclosure

The References section is well-signaled and one level deep with descriptions, but the referenced files (references/room-lifecycle-and-state.md, message-validation-and-security.md, matchmaking-and-reconnection.md) do not exist in the bundle, so the navigation paths are broken.

2 / 3

Total

10

/

12

Passed

Description

100%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is specific, third-person, and answers both what and when with an explicit 'Use when' trigger and a keyword list. It is concise and clearly distinct from other skills.

DimensionReasoningScore

Specificity

Lists multiple concrete actions — 'Build authoritative real-time multiplayer servers', 'implementing rooms, schema state sync, client message validation, matchmaking, authentication, reconnection handling, or server-side anti-cheat constraints' — matching the score-3 anchor for several specific concrete actions.

3 / 3

Completeness

Clearly answers both 'what' ('Build authoritative real-time multiplayer servers with Colyseus 0.17+') and 'when' with an explicit 'Use when...' trigger clause, matching the score-3 anchor.

3 / 3

Trigger Term Quality

Both an explicit 'Use when...' clause and a 'Keywords:' list ('colyseus, room lifecycle, schema, multiplayer, websocket, matchmaking, onJoin, onLeave, onDrop, allowReconnection') give strong coverage of natural terms a user would say.

3 / 3

Distinctiveness Conflict Risk

A clear niche (Colyseus authoritative multiplayer servers) with specific triggers (onJoin/onLeave/onDrop, allowReconnection, schema) makes it unlikely to fire for the wrong skill.

3 / 3

Total

12

/

12

Passed

Validation

81%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation13 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

allowed_tools_field

'allowed-tools' contains unusual tool name(s)

Warning

relative_links

Relative link issues: 3 missing

Warning

referenced_paths_exist

Referenced path issues: 3 missing

Warning

Total

13

/

16

Passed

Reviewed

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