What is app.spectrum.analyzer AGENTS.md?

Repository instructions for a browser-based audio spectrum analyzer that reads live sound, calculates frequency data, and draws it on a canvas. A spectrum analyzer shows how much sound exists at different frequencies.

Use them when modifying the analyzer's audio setup, frequency processing, canvas rendering, controls, or shared utilities.

They explain the project's structure and conventions, helping an agent change the right files without introducing an unnecessary framework.

How polarity/app.spectrum.analyzer configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to polarity/app.spectrum.analyzer. 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/polarity/app.spectrum.analyzer/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/polarity/app.spectrum.analyzer

Made for: Codex, 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/polarity/app.spectrum.analyzer/agents-md/github.svg)](https://agentmods.dev/instructions/polarity/app.spectrum.analyzer/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/polarity/app.spectrum.analyzer/agents-md"><img src="https://agentmods.dev/badge/instructions/polarity/app.spectrum.analyzer/agents-md/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/instructions/polarity/app.spectrum.analyzer/agents-md"><img src="https://agentmods.dev/badge/instructions/polarity/app.spectrum.analyzer/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 858 This file is loaded in full into every session.

When invoked 858 The same file — it is already loaded in full.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00858	$0.00858
Opus 5.5	$0.00343	$0.00343
Sonnet 5.5	$0.00172	$0.00172
Haiku 4.5	$0.00086	$0.00086

Measured 2mo ago against content hash b79bf3f4ff07, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

app.spectrum.analyzer AGENTS.md 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.

AGENTS.md · 77 lines

How it starts

The opening of the file, as written. The whole thing — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agents Guide

This file gives coding agents a project-specific guide for app.spectrum.analyzer.

Project Scope

This repository is a browser-based spectrum analyzer built with vanilla HTML, CSS, and JavaScript modules.
The app captures live audio input, computes FFT data in the browser, and renders a fullscreen frequency spectrum on canvas.
Keep the project framework-free unless the user explicitly asks for a stack change.

Architecture Map

index.html: Entry document, metadata, root canvas, controls shell, descriptive copy, and footer links.
styles.css: Current global layout and control styling.
main.js: App bootstrap, UI assembly, start button wiring, and canvas setup.
audioSetup.js: Audio device enumeration, AudioContext creation, analyzer setup, and media stream connection.
audioProcessing.js: Threshold, RMS, and slope-weight state plus spectrum-processing helpers.
drawingFunctions.js: Main render loop, canvas resize logic, peak detection, labels, and guide rendering.
uiComponents.js: Dynamic slider and color-picker creation for the controls panel.
utils.js: Shared colors, frequency helpers, note detection, and calibration logic.
.github/instructions/: Editor and agent guidance already present in the repo; keep new docs aligned with it.
docs/overview.md: Human-readable project overview and runtime flow.
docs/design-system.md: Current visual direction and target alignment with app.vectorscope.

Conventions To Follow

JavaScript style follows StandardJS conventions used in the repo:
- 2-space indentation
- No semicolons
Keep UI/bootstrap logic in main.js, audio device and analyzer setup in audioSetup.js, and drawing logic in drawingFunctions.js.
Preserve the current fullscreen spectrum layout unless the user explicitly asks for a structural UI change.
When adjusting visuals, prefer centralized theme tokens in CSS over adding more hard-coded colors in JS or inline styles.
Avoid introducing frameworks, build tooling, or bundlers for simple changes.

Read the full file on GitHub · 77 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 · 77 lines · 858 tokens per session scan A b79bf3f4ff07

Subscribe to this mod's changes

app.spectrum.analyzer AGENTS.md is an instructions file published in the GitHub repository polarity/app.spectrum.analyzer (21 stars, last pushed 7mo ago), licensed MIT. It adds 858 tokens to every session, about $0.0034 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 2026-08-30.

audio-visualizer

app.spectrum.analyzer AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
app.spectrum.analyzer AGENTS.mdpolarity/app.spectrum.analyzer	Instructions file	21	7mo ago	MIT	A	858	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

app.spectrum.analyzer: Instructions file for Codex