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.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.svg" alt="Measured on agentmods" 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. 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.

Model	Per session	Once invoked
Fable 5.1	$0.00083	$0.01650
Opus 5	$0.00042	$0.00825
Sonnet 5	$0.00017	$0.00330
Haiku 4.5	$0.00008	$0.00165

Measured 5d ago against content hash bc5a8507e655, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, 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 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.

.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.

5d 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 24d ago), licensed MIT. It adds 83 tokens to every session and 1,650 once invoked, about $0.0004 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 2026-09-01.

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orkid: Skill for Claude Code