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circuitRF: Instructions file for Claude Code

CLAUDE.md

circuitRF CLAUDE.md is an instructions file for Claude Code from potatobeanradio/circuitRF. It costs 9,886 tokens per session, scanned A, original, MIT.

Project instructions for circuitRF, a lightweight cross-platform radio-frequency circuit simulator that handles specialized RF calculations rather than general SPICE simulation.

In plain words
What is it for?
Use them when searching the codebase, resolving issues, maintaining the .NET and Avalonia application, or documenting significant fixes in resolution notes.
Why use it?
They define the simulator's intended scope, technology choices, and repository practices so changes do not add unrelated features or obscure important fixes.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md.

This is potatobeanradio/circuitRF's own configuration. It tells Claude Code how to work on circuitRF itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything circuitRF configures →

not rated 103repo +4 changed today A scan 9,886 tokens original MIT
View source ↗ potatobeanradio/circuitRF
Reuse

Borrowing it

Nothing to install: this file belongs to potatobeanradio/circuitRF. 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/potatobeanradio/circuitRF/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/potatobeanradio/circuitRF

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 circuitRF CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/potatobeanradio/circuitrf/claude-md.svg)](https://agentmods.dev/instructions/potatobeanradio/circuitrf/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/potatobeanradio/circuitrf/claude-md"><img src="https://agentmods.dev/badge/instructions/potatobeanradio/circuitrf/claude-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 9,886 This file is loaded in full into every session.
When invoked 9,886 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.09886 $0.09886
Opus 5 $0.04943 $0.04943
Sonnet 5 $0.01977 $0.01977
Haiku 4.5 $0.00989 $0.00989

Measured today against content hash 4573b9e2c5d7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

circuitRF CLAUDE.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 today.

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.md · 480 lines

How it starts

The opening of the file, as written. The whole thing — 480 lines — stays where its author put it; the contents beside it link to each section on GitHub.

circuitRF

Lightweight cross-platform RF circuit simulator (DC, S-parameters, harmonic balance, loadpull/sourcepull). NOT a SPICE simulator. See docs/PRD.md for scope, the five hero circuits, and non-goals. This file is standing project memory — keep it current.

Searching this repo

Use grep (or ripgrep) directly whenever possible instead of spawning a search agent. This repo's structure is well-known and its files are plain text — a targeted grep -n finds a symbol, class, or XAML control faster and far cheaper than delegating a "find X" task to an agent. Reach for an agent only when the search genuinely needs multi-step reasoning across many unrelated locations, not for straightforward lookups.

Resolving Issues

If significant findings were found during bug fixes or changes, write to the relevant RESOLVED.md files never CLAUDE.md. This helps keep the CLAUDE.md files small.

Never quote the owner or users in git commit comments, RESOLVED.md files or anywhere in the code. Instead, briefly paraphrase owner/user messages. Pre-existing quotes are ok.

Stack

  • .NET 10 (LTS), C# 14

  • Avalonia 12 (UI), SkiaSharp (canvas rendering), CommunityToolkit.MVVM (MVVM)

  • CSparse.NET (sparse complex LU for large MNA), NumFlat (dense linear algebra)

  • RfCore (Touchstone I/O, network params, the DataSet/DataCube result types, interpolation, renormalization, plotting) is a first-class project of this repository, exactly like Core, Engine, and Ui — src/RfCore/ with its tests at tests/RfCore.Tests/, both listed in circuitrf.slnx, referenced via ordinary ProjectReference.

    It is NOT a subtree, and there is nothing left to "un-subtree" (2026-07-30). It arrived via git subtree add on 2026-07-29 purely to preserve history (brief-housekeeping-tearoff-palette-repo.md §6 — splotRF, the other consumer of the standalone RfCore repo, was being retired). "Being a subtree" is not a persistent state in git: there is no .gitmodules, no config, no live link to anything. RfCore's 24 original commits are a permanent second parent of merge 0bd04db, and git blame on any file under src/RfCore/ still resolves to its original author and date. The only residue is a three-line git-subtree-dir/-mainline/-split trailer in that one old commit message, which is inert unless someone runs git subtree pull — so don't. Treat src/RfCore/ as ordinary first-party code.

Read the full file on GitHub · 480 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. today Changed · +10 tokens per session 4573b9e2c5d7
  2. yesterday Changed · +59 lines · +1,382 tokens per session 62e66d051d28
  3. 4d ago Changed · +24 lines · +576 tokens per session 9fca8da72460
  4. 8d ago First seen · 397 lines · 7,918 tokens per session scan A accb671e8cf8

Subscribe to this mod's changes

circuitRF CLAUDE.md is an instructions file published in the GitHub repository potatobeanradio/circuitRF (103 stars, last pushed today), licensed MIT. It adds 9,886 tokens to every session, about $0.0494 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 2026-08-30.

Scientificedaharmonic-balancemethod-of-momentsrf-designrf-deviceswirebond
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