impl

An implementation-phase guide for audio plug-in digital signal processing, where code changes sound based on user-controlled parameters. It focuses on the plug-in’s processor source files after the design phase is complete.

In plain words
What is it for?
Use it to implement parameter-driven audio processing in PluginProcessor.h and PluginProcessor.cpp after the project design and framework checks pass.
Why use it?
It prevents implementation from starting with missing architecture decisions, an unchosen user-interface framework, or incomplete project state.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/noizefield/audio-plugin-coder/impl
Any agent
npx skills add Noizefield/audio-plugin-coder --skill impl
Clone the repo
git clone --depth 1 https://github.com/Noizefield/audio-plugin-coder

Made for: Claude Code, Codex.

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,593 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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.07593
Opus 5 $0.00000 $0.03796
Sonnet 5 $0.00000 $0.01519
Haiku 4.5 $0.00000 $0.00759

Measured 2d ago against content hash 6373dead8896, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

impl 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 2d 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

Copies of this mod

1 near-identical copy found in the catalogue:

.agent/skills/impl/SKILL.md · 978 lines

How it starts

The opening of the file, as written. The whole thing — 978 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SKILL: DSP IMPLEMENTATION

Goal: Implement audio processing where parameters control DSP Focus: PluginProcessor.h, PluginProcessor.cpp Output Location: $PluginPath/Source/


📊 PHASE 4: CODE (DSP Implementation)

Trigger: /impl [Name] (after DESIGN phase complete) Input: Reads $PluginPath/status.json and .ideas/parameter-spec.md Prerequisites: Architecture plan complete, UI framework selected

State Validation:

# Import state management module
. "$PSScriptRoot\..\scripts\state-management.ps1"
$PluginPath = Get-ApcPluginPath -PluginName $PluginName

# Validate prerequisites
if (-not (Test-PluginState -PluginPath $PluginPath -RequiredPhase "design_complete" -RequiredFiles @(".ideas/architecture.md", ".ideas/plan.md"))) {
    Write-Error "Prerequisites not met. Complete design phase first."
    exit 1
}

# Check framework selection
$state = Get-PluginState -PluginPath $PluginPath
if ($state.ui_framework -eq "pending") {
    Write-Error "UI framework not selected. Cannot proceed with implementation."
    exit 1
}
Write-Host "Framework: $($state.ui_framework)" -ForegroundColor Cyan

🎨 PHASE 4.0: DESIGN-TO-FRAMEWORK CONVERSION (CRITICAL - BEFORE DSP CODE)

Framework Routing:

  • If ui_framework == webview: use templates from templates/webview/
  • If ui_framework == visage: use templates from templates/visage/ and do not generate HTML

IMPORTANT: This phase converts the approved design specifications into framework-specific code. User must approve the conversion before DSP implementation begins.

4.0.1 Read Approved Design

  • Read Design/v[N]-ui-spec.md (latest approved version)
  • Read Design/v[N]-style-guide.md (latest approved version)
  • Read .ideas/parameter-spec.md for parameter definitions

4.0.2 Framework-Specific Conversion

For WebView Framework: Convert the approved design specs into production JUCE WebView code.

Create the required directory structure:

$PluginPath/Source/ui/
└───public/
    │   index.html          # Production UI based on approved design - ALL CSS/JS inline (webview-008)
    │   test-local.html     # Browser-test copy of index.html

Read the full file on GitHub · 978 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. 2d ago First seen · 978 lines · 0 tokens per session scan A 6373dead8896

Subscribe to this mod's changes

impl is a skill published in the GitHub repository Noizefield/audio-plugin-coder (313 stars, last pushed 7d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 7,593 tokens. 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 2026-08-30.

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