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.
npx skills add CoralGame/Claude-Code-Game-Studios --skill gate-checkgit clone --depth 1 https://github.com/CoralGame/Claude-Code-Game-StudiosWrote 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/coralgame/claude-code-game-studios/gate-check)<a href="https://agentmods.dev/skills/coralgame/claude-code-game-studios/gate-check"><img src="https://agentmods.dev/badge/skills/coralgame/claude-code-game-studios/gate-check.svg" alt="Measured on agentmods" 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 | $0.00029 | $0.02191 |
| Opus 5 | $0.00015 | $0.01095 |
| Sonnet 5 | $0.00006 | $0.00438 |
| Haiku 4.5 | $0.00003 | $0.00219 |
Grade A, and why
gate-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 6d 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.
This is a copy
95% identical to gate-check — 4 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 253 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Phase Gate Validation
This skill validates whether the project is ready to advance to the next development phase. It checks for required artifacts, quality standards, and blockers.
Distinct from /project-stage-detect: That skill is diagnostic ("where are we?").
This skill is prescriptive ("are we ready to advance?" with a formal verdict).
Production Stages (7)
The project progresses through these stages:
- Concept — Brainstorming, game concept document
- Systems Design — Mapping systems, writing GDDs
- Technical Setup — Engine config, architecture decisions
- Pre-Production — Prototyping, vertical slice validation
- Production — Feature development (Epic/Feature/Task tracking active)
- Polish — Performance, playtesting, bug fixing
- Release — Launch prep, certification
When a gate passes, write the new stage name to production/stage.txt
(single line, e.g. Production). This updates the status line immediately.
1. Parse Arguments
- With argument:
/gate-check production— validate readiness for that specific phase - No argument: Auto-detect current stage using the same heuristics as
/project-stage-detect, then validate the NEXT phase transition
2. Phase Gate Definitions
Gate: Concept → Systems Design
Required Artifacts:
-
design/gdd/game-concept.mdexists and has content - Game pillars defined (in concept doc or
design/gdd/game-pillars.md)
Quality Checks:
- Game concept has been reviewed (
/design-reviewverdict not MAJOR REVISION NEEDED) - Core loop is described and understood
- Target audience is identified
Gate: Systems Design → Technical Setup
Required Artifacts:
- Systems index exists at
design/gdd/systems-index.mdwith at least MVP systems enumerated - At least 1 GDD in
design/gdd/(beyond game-concept.md and systems-index.md)
Quality Checks:
- GDD(s) pass design review (8 required sections present)
- System dependencies are mapped in the systems index
- MVP priority tier is defined
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.
- 6d ago First seen · 253 lines · 29 tokens per session scan A 92ac4973e93e
gate-check is a skill published in the GitHub repository CoralGame/Claude-Code-Game-Studios (19 stars, last pushed 5mo ago), licensed MIT. It adds 29 tokens to every session and 2,191 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to gate-check, differing in 4 lines, and is treated as a copy.
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