A reference skill for Orkid's FxInterface, a graphics system for connecting shaders—the programs that run on a GPU—to application data.

Use it to understand shader parameters, textures, uniform and storage buffers, descriptor sets, compute shaders, and Python bindings.

It provides the relevant source-file references needed to answer detailed shader and GPU-binding questions accurately.

How tweakoz/orkid configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to tweakoz/orkid. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/tweakoz/orkid/develop/.claude/skills/orklev2-fxi/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/tweakoz/orkid

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/tweakoz/orkid/orklev2-fxi/github.svg)](https://agentmods.dev/skills/tweakoz/orkid/orklev2-fxi)

Your own site

<a href="https://agentmods.dev/skills/tweakoz/orkid/orklev2-fxi"><img src="https://agentmods.dev/badge/skills/tweakoz/orkid/orklev2-fxi/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/tweakoz/orkid/orklev2-fxi"><img src="https://agentmods.dev/badge/skills/tweakoz/orkid/orklev2-fxi.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 83 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,650 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. Third-party audits

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 1 finding, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

high Memory Poisoning · line 28
Skill manipulates agent memory, state, or stored context. Memory corruption can alter personality, override safety rules, or cause unpredictable behavior.

Fix: Protect agent memory and state from modification by untrusted content. Use read-only memory for critical instructions and validate all state changes.

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00083	$0.01650
Opus 5.5	$0.00033	$0.00660
Sonnet 5.5	$0.00017	$0.00330
Haiku 4.5	$0.00008	$0.00165

Measured 2mo ago against content hash bc5a8507e655, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

orklev2-fxi 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 2mo 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.

.claude/skills/orklev2-fxi/SKILL.md · 166 lines

How it starts

The opening of the file, as written. The whole thing — 166 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Orkid FxInterface (FXI) Reference

When answering questions about shader parameter binding, FXI operations, or UBO/SSBO management in orkid, consult the files below. All under ork.lev2/.

Key Files

Component	File
FXI Interface	`inc/ork/lev2/gfx/fxi.h` (lines 21–135)
Shader System Types	`inc/ork/lev2/gfx/shadman.h`
Vulkan FXI	`src/gfx/vulkan/headers/vulkan_ctx.h` (lines 462–582)
Python Shader Bindings	`pyext/src/pyext_gfx_shader.cpp`
Python Material Bindings	`pyext/src/pyext_gfx_material.cpp`

FXI Interface (fxi.h:21–135)

Frame & Block Lifecycle

BeginFrame() / EndFrame() — frame boundaries
BeginBlock(technique, RCID) → int (pass count)
EndBlock() — end technique block
CommitParams() — flush parameter changes to GPU
reset() — reset state

Shader/Technique/Parameter Lookup

technique(shader, name) → FxShaderTechnique*
parameter(shader, name) → FxShaderParam*
uniformBlock(shader, name) → FxUniformBlock*
samplerSet(shader, name) → fxsamplerset_constptr_t
computeShader(shader, name) → FxComputeShader*
storageBlock(shader, name) → fxparamstorageblock_constptr_t
findStorageMember(block, member_name) → fxbuffer_member_constptr_t

Scalar/Vector Parameter Binding

Method	Type
`bindParamBool(param, bool)`	bool
`bindParamInt(param, int)`	int
`bindParamFloat(param, float)`	float
`bindParamU32(param, uint32_t)`	uint32
`bindParamU64(param, uint64_t)`	uint64
`bindParamVect2(param, fvec2)`	vec2
`bindParamVect3(param, fvec3)`	vec3
`bindParamVect4(param, fvec4)`	vec4

Array Parameter Binding

Method	Type
`bindParamFloatArray(param, floats, count)`	float[]
`bindParamVect2Array(param, vecs, count)`	vec2[]
`bindParamVect3Array(param, vecs, count)`	vec3[]
`bindParamVect4Array(param, vecs, count)`	vec4[]

Matrix Binding

Method	Type
`bindParamMatrix(param, fmtx4)`	mat4
`bindParamMatrix(param, fmtx3)`	mat3
`bindParamMatrixArray(param, mats, count)`	mat4[]

Read the full file on GitHub · 166 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.

2mo ago First seen · 166 lines · 83 tokens per session scan A bc5a8507e655

Subscribe to this mod's changes

orklev2-fxi is a skill published in the GitHub repository tweakoz/orkid (35 stars, last pushed 2mo ago), licensed MIT. It adds 83 tokens to every session and 1,650 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-09-01.

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orklev2-fxi next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
orklev2-fxitweakoz/orkid	Skill	35	2mo ago	MIT	A	83	Claude Code
unity-pipelineAlex-Rachel/TEngine	Skill	2.4k	16d ago	MIT	A	97	Claude Code
dart-verify-simdartsim/dart	Skill	1.2k	yesterday	BSD-2-Clause	A	32	Claude Code, Codex
metasoundskevinpbuckley/VibeUE	Skill	812	2d ago	MIT	A	63	Claude Code, Codex
dart-model-upgradedartsim/dart	Skill	1.2k	yesterday	BSD-2-Clause	A	42	Claude Code
html-to-uguiAlex-Rachel/TEngine	Skill	2.4k	16d ago	MIT	A	75	Codex
luban-devAlex-Rachel/TEngine	Skill	2.4k	16d ago	MIT	A	62	Codex

orkid: Skill for Claude Code