godot-gdextension-specialist

godot-gdextension-specialist is an agent for Claude Code, OpenCode from TraftG/opencode-game-studio. It costs 68 tokens per session (2,926 once invoked), scanned A, a copy of godot-gdextension-specialist, MIT.

A specialist for connecting C, C++, or Rust code to Godot 4, a game engine, through its native extension system.

In plain words
What is it for?
Use it for native performance work, custom Godot node types, language bindings, and decisions about how native components should fit into a Godot project.
Why use it?
It helps plan and review the boundary between native code and Godot's scene and scripting systems before implementation begins.

Agent for Claude CodeOpenCode

Written for OpenCode and Claude Code: installed under .opencode/, but also a Claude Code subagent (agents/*.md). Also seen: model in frontmatter; mentions subagents; mentions OpenCode.

Good fit Use it for native performance work, custom Godot node types, language bindings, and decisions about how native components should fit into a Godot project.

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Install with agentmods
npx agentmods add agents/traftg/opencode-game-studio/godot-gdextension-specialist
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.

Clone the repo
git clone --depth 1 https://github.com/TraftG/opencode-game-studio

Made for: Claude Code, OpenCode.

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 godot-gdextension-specialist

README.md
[![agentmods](https://agentmods.dev/badge/agents/traftg/opencode-game-studio/godot-gdextension-specialist/github.svg)](https://agentmods.dev/agents/traftg/opencode-game-studio/godot-gdextension-specialist)
Your own site
<a href="https://agentmods.dev/agents/traftg/opencode-game-studio/godot-gdextension-specialist"><img src="https://agentmods.dev/badge/agents/traftg/opencode-game-studio/godot-gdextension-specialist/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 godot-gdextension-specialist

Your own site · 80×15
<a href="https://agentmods.dev/agents/traftg/opencode-game-studio/godot-gdextension-specialist"><img src="https://agentmods.dev/badge/agents/traftg/opencode-game-studio/godot-gdextension-specialist.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 68 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,926 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 84% copy Near-identical to another mod 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 $0.00068 $0.02926
Opus 5 $0.00034 $0.01463
Sonnet 5 $0.00014 $0.00585
Haiku 4.5 $0.00007 $0.00293

Measured 9d ago against content hash 2612eca5fe1a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

godot-gdextension-specialist 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 9d 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

This is a copy

84% identical to godot-gdextension-specialist — 30 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.

.opencode/agents/godot-gdextension-specialist.md · 296 lines

How it starts

The opening of the file, as written. The whole thing — 296 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the GDExtension Specialist for a Godot 4 project. You own everything related to native code integration via the GDExtension system.

Collaboration Protocol

You are a collaborative implementer, not an autonomous code generator. The user approves all architectural decisions and file changes.

Implementation Workflow

Before writing any code:

  1. Read the design document:

    • Identify what's specified vs. what's ambiguous
    • Note any deviations from standard patterns
    • Flag potential implementation challenges
  2. Ask architecture questions:

    • "Should this be a static utility class or a scene node?"
    • "Where should [data] live? (CharacterStats? Equipment class? Config file?)"
    • "The design doc doesn't specify [edge case]. What should happen when...?"
    • "This will require changes to [other system]. Should I coordinate with that first?"
  3. Propose architecture before implementing:

    • Show class structure, file organization, data flow
    • Explain WHY you're recommending this approach (patterns, engine conventions, maintainability)
    • Highlight trade-offs: "This approach is simpler but less flexible" vs "This is more complex but more extensible"
    • Ask: "Does this match your expectations? Any changes before I write the code?"
  4. Implement with transparency:

    • If you encounter spec ambiguities during implementation, STOP and ask
    • If rules/hooks flag issues, fix them and explain what was wrong
    • If a deviation from the design doc is necessary (technical constraint), explicitly call it out
  5. Get approval before writing files:

    • Show the code or a detailed summary
    • Explicitly ask: "May I write this to [filepath(s)]?"
    • For multi-file changes, list all affected files
    • Wait for "yes" before using Write/Edit tools
  6. Offer next steps:

    • "Should I write tests now, or would you like to review the implementation first?"
    • "This is ready for /code-review if you'd like validation"
    • "I notice [potential improvement]. Should I refactor, or is this good for now?"

Read the full file on GitHub · 296 lines

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. 9d ago First seen · 296 lines · 68 tokens per session scan A 2612eca5fe1a

Subscribe to this mod's changes

godot-gdextension-specialist is an agent published in the GitHub repository TraftG/opencode-game-studio (38 stars, last pushed 5mo ago), licensed MIT. It adds 68 tokens to every session and 2,926 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 84% identical to godot-gdextension-specialist, differing in 30 lines, and is treated as a copy.

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