faust-header-gen

faust-header-gen is a skill for Claude Code from gertsylvest/meta-team. It costs 54 tokens per session (928 once invoked), scanned A, original, MIT.

A generator that reads C code produced by Faust and creates a matching C or C++ header with the public function declarations.

In plain words
What is it for?
Use it to create guarded headers with C++ compatibility, shared Faust type definitions, and opaque declarations for Faust-generated audio code.
Why use it?
It removes manual header maintenance and helps prevent the header from falling out of sync with the generated implementation.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: positional $N argument.

Good fit Use it to create guarded headers with C++ compatibility, shared Faust type definitions, and opaque declarations for Faust-generated audio code.

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Install with agentmods
npx agentmods add skills/gertsylvest/meta-team/faust-header-gen
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.

Any agent
npx skills add gertsylvest/meta-team --skill faust-header-gen
Clone the repo
git clone --depth 1 https://github.com/gertsylvest/meta-team

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.

agentmods badge for faust-header-gen

README.md
[![agentmods](https://agentmods.dev/badge/skills/gertsylvest/meta-team/faust-header-gen/github.svg)](https://agentmods.dev/skills/gertsylvest/meta-team/faust-header-gen)
Your own site
<a href="https://agentmods.dev/skills/gertsylvest/meta-team/faust-header-gen"><img src="https://agentmods.dev/badge/skills/gertsylvest/meta-team/faust-header-gen/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 faust-header-gen

Your own site · 80×15
<a href="https://agentmods.dev/skills/gertsylvest/meta-team/faust-header-gen"><img src="https://agentmods.dev/badge/skills/gertsylvest/meta-team/faust-header-gen.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 928 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 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00054 $0.00928
Opus 5 $0.00027 $0.00464
Sonnet 5 $0.00011 $0.00186
Haiku 4.5 $0.00005 $0.00093

Measured 10d ago against content hash 5a1eddc15ee6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

faust-header-gen 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 10d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (gen_header.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

library/skills/faust-header-gen/SKILL.md · 70 lines

How it starts

The opening of the file, as written. The whole thing — 70 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Faust Header Gen

Read a Faust-generated C file and produce a matching extern "C" header. Eliminates the manual step of writing and maintaining a synth.h, which was historically a source of errors whenever the Faust class name (-cn) changed or new functions were added.

Requirements

  • Python 3.8+

Instructions

Arguments are in $ARGUMENTS. Pass them directly to the generator:

python3 "$(dirname "$0")/gen_header.py" $ARGUMENTS

What the generated header contains

Element Detail
Include guard #ifndef CLASSNAME_H / #define CLASSNAME_H (or custom via --guard)
FAUSTFLOAT default #ifndef FAUSTFLOAT / #define FAUSTFLOAT float guard so the header can be included without the generated C
Dependency note Comment stating faust/gui/CInterface.h must be included before this header (it defines UIGlue, MetaGlue, FAUSTFLOAT)
extern "C" wrapping Guarded by #ifdef __cplusplus so the header works for both C and C++ consumers
Opaque forward declaration typedef struct ClassName ClassName; — declares a named struct tag even though the generated C uses an anonymous struct typedef. This is the correct pattern for C++ consumers who hold only opaque pointers.
Public function prototypes All non-static functions whose names end with the class name, grouped into: Lifecycle, Metadata, Query, Initialisation, User Interface, DSP
RESTRICT stripped The generated C uses RESTRICT on parameter declarations. Headers omit it — restrict is an optimisation hint, not a type qualifier that affects linkage.
void on zero-arg functions newSynth() in the generated C becomes newSynth(void) in the header — correct C for "no arguments".

Options

Option Default Description
-o FILE stdout Write header to file instead of stdout
--guard NAME CLASSNAME_H Override the include guard name
--exports FILE Also write a linker exports file (one _symbol per line, for .exp dylib builds)

Read the full file on GitHub · 70 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 10d ago First seen · 70 lines · 54 tokens per session scan A 5a1eddc15ee6

Subscribe to this mod's changes

faust-header-gen is a skill published in the GitHub repository gertsylvest/meta-team (5 stars, last pushed 1mo ago), licensed MIT. It adds 54 tokens to every session and 928 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 2026-08-31.

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