balance-check

balance-check is a skill for Claude Code, Codex from TraftG/opencode-game-studio. It costs 42 tokens per session (533 once invoked), scanned A, original, MIT.

A game-development review tool that examines combat, rewards, resources, item values, and player progression. Game balance means keeping these systems from producing unfair or unintended advantages.

In plain words
What is it for?
Use it after changing game-balance data to calculate damage and time-to-kill, map resource income and spending, inspect progression, and evaluate loot acquisition.
Why use it?
It helps find options that dominate others, broken progression curves, impossible defensive states, infinite resource loops, and other problems hidden in data or formulas.

Skill for Claude CodeCodex

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/traftg/opencode-game-studio/balance-check
Any agent
npx skills add TraftG/opencode-game-studio --skill balance-check
Clone the repo
git clone --depth 1 https://github.com/TraftG/opencode-game-studio

Made for: Claude Code, Codex.

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 balance-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/traftg/opencode-game-studio/balance-check.svg)](https://agentmods.dev/skills/traftg/opencode-game-studio/balance-check)
Your own site
<a href="https://agentmods.dev/skills/traftg/opencode-game-studio/balance-check"><img src="https://agentmods.dev/badge/skills/traftg/opencode-game-studio/balance-check.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 533 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 $0.00042 $0.00533
Opus 5 $0.00021 $0.00267
Sonnet 5 $0.00008 $0.00107
Haiku 4.5 $0.00004 $0.00053

Measured 5d ago against content hash 5698b9aee687, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

balance-check 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.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

.opencode/skills/balance-check/SKILL.md · 73 lines

What it actually says

When this skill is invoked:

  1. Identify the balance domain from the argument.

  2. Read relevant data files from assets/data/ and design/balance/.

  3. Read the design document for the system being checked from design/gdd/.

  4. Perform analysis:

    For combat balance:

    • Calculate DPS for all weapons/abilities at each power tier
    • Check time-to-kill at each tier
    • Identify any options that dominate all others (strictly better)
    • Check if defensive options can create unkillable states
    • Verify damage type/resistance interactions are balanced

    For economy balance:

    • Map all resource faucets and sinks with flow rates
    • Project resource accumulation over time
    • Check for infinite resource loops
    • Verify gold sinks scale with gold generation
    • Check if any items are never worth purchasing

    For progression balance:

    • Plot the XP curve and power curve
    • Check for dead zones (no meaningful progression for too long)
    • Check for power spikes (sudden jumps in capability)
    • Verify content gates align with expected player power
    • Check if skip/grind strategies break intended pacing

    For loot balance:

    • Calculate expected time to acquire each rarity tier
    • Check pity timer math
    • Verify no loot is strictly useless at any stage
    • Check inventory pressure vs acquisition rate
  5. Output the analysis:

## Balance Check: [System Name]

### Data Sources Analyzed
- [List of files read]

### Health Summary: [HEALTHY / CONCERNS / CRITICAL ISSUES]

### Outliers Detected
| Item/Value | Expected Range | Actual | Issue |
|-----------|---------------|--------|-------|

### Degenerate Strategies Found
- [Strategy description and why it is problematic]

### Progression Analysis
[Graph description or table showing progression curve health]

### Recommendations
| Priority | Issue | Suggested Fix | Impact |
|----------|-------|--------------|--------|

### Values That Need Attention
[Specific values with suggested adjustments and rationale]
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 · 73 lines · 42 tokens per session scan A 5698b9aee687

Subscribe to this mod's changes

balance-check is a skill published in the GitHub repository TraftG/opencode-game-studio (38 stars, last pushed 4mo ago), licensed MIT. It adds 42 tokens to every session and 533 once invoked, about $0.0002 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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