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 agentmods add skills/striderza/opencodegamestudios/gate-checknpx skills add striderZA/OpenCodeGameStudios --skill gate-checkgit clone --depth 1 https://github.com/striderZA/OpenCodeGameStudiosWrote 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/striderza/opencodegamestudios/gate-check)<a href="https://agentmods.dev/skills/striderza/opencodegamestudios/gate-check"><img src="https://agentmods.dev/badge/skills/striderza/opencodegamestudios/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 | $0.00064 | $0.08225 |
| Opus 5 | $0.00032 | $0.04112 |
| Sonnet 5 | $0.00013 | $0.01645 |
| Haiku 4.5 | $0.00006 | $0.00822 |
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 yesterday.
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 — 669 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:
- Exploration — Pre-workflow: rapid prototyping multiple ideas (/explore)
- 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
Special gate: workflow-selection — Only valid from the Exploration stage.
When it passes, it sets both production/workflow-mode.txt (hybrid or full) and
production/stage.txt (Concept). See the Workflow Selection gate below.
1. Parse Arguments
Target phase: $ARGUMENTS[0] (blank = auto-detect current stage, then validate next transition)
Also resolve the review mode (once, store for all gate spawns this run):
- If
--review [full|lean|solo]was passed → use that - Else read
production/review-mode.txt→ use that value - Else → default to
lean
Note: in solo mode, director spawns (CD-PHASE-GATE, TD-PHASE-GATE, PR-PHASE-GATE, AD-PHASE-GATE) are skipped — gate-check becomes artifact-existence checks only. In lean mode, all four directors still run (phase gates are the purpose of lean mode).
- With argument:
/gate-check production— validate readiness for that specific phase/gate-check workflow-selection— run workflow selection (only valid from exploration stage) - No argument: Auto-detect current stage using the same heuristics as
/project-stage-detect, then confirm with the user before running:
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.
- yesterday First seen · 669 lines · 64 tokens per session scan A 8f3c8ce318b6
gate-check is a skill published in the GitHub repository striderZA/OpenCodeGameStudios (84 stars, last pushed 24d ago), licensed MIT. It adds 64 tokens to every session and 8,225 once invoked, about $0.0003 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 2026-09-03.
Other skills, from other repositories
generated-raster-asset-pipeline
Define acceptance, validation, and runtime integration rules for raster assets generated with image models before they become real project content.
lighting-lod-pipeline
Define lighting policy, light budgets, LOD chains, and culling rules so 3D scenes look intentional and hit frame budgets.
2d-animation-pipeline
Define authoring, import, and state machine rules for frame-by-frame and skeletal 2D animations.
sprite-pipeline
Define import, slicing, atlas packing, and naming rules for 2D sprite assets.
ui-animation-pipeline
Define transition, feedback, and state-driven animation rules for UI elements.
tilemap-pipeline
Define tileset creation, auto-tile rules, collision shapes, and tilemap configuration for 2D levels.