Agent skill

Architecture

Architecture of airspy-fmradion — signal flow from SDR source to audio output, key type aliases, the Source abstraction, and the FM decoder pipeline.

GPL-3.0Auto-check passed

Install Architecture

skills CLI

$ npx skills add jj1bdx/airspy-fmradion --skill architecture -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install jj1bdx/airspy-fmradion architecture --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/jj1bdx/airspy-fmradion.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/architecture .claude/skills/architecture && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "architecture" agent skill from https://github.com/jj1bdx/airspy-fmradion/tree/main/.claude/skills/architecture into .claude/skills/architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "architecture", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/jj1bdx/airspy-fmradion/tree/main/.claude/skills/architecture

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add jj1bdx/airspy-fmradion --skill architecture -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install jj1bdx/airspy-fmradion architecture --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jj1bdx/airspy-fmradion.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/architecture .agents/skills/architecture && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "architecture" agent skill from https://github.com/jj1bdx/airspy-fmradion/tree/main/.claude/skills/architecture into .agents/skills/architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "architecture", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add jj1bdx/airspy-fmradion --skill architecture -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install jj1bdx/airspy-fmradion architecture --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jj1bdx/airspy-fmradion.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/architecture .cursor/skills/architecture && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "architecture" agent skill from https://github.com/jj1bdx/airspy-fmradion/tree/main/.claude/skills/architecture into .cursor/skills/architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "architecture", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/jj1bdx/airspy-fmradion.git --path .claude/skills/architecture

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add jj1bdx/airspy-fmradion --skill architecture -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install jj1bdx/airspy-fmradion architecture --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jj1bdx/airspy-fmradion.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/architecture .gemini/skills/architecture && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "architecture" agent skill from https://github.com/jj1bdx/airspy-fmradion/tree/main/.claude/skills/architecture into .gemini/skills/architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "architecture", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install jj1bdx/airspy-fmradion architecture

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add jj1bdx/airspy-fmradion --skill architecture -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/jj1bdx/airspy-fmradion.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/architecture .github/skills/architecture && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "architecture" agent skill from https://github.com/jj1bdx/airspy-fmradion/tree/main/.claude/skills/architecture into .github/skills/architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "architecture", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add jj1bdx/airspy-fmradion --skill architecture -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install jj1bdx/airspy-fmradion architecture --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jj1bdx/airspy-fmradion.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/architecture .opencode/skills/architecture && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "architecture" agent skill from https://github.com/jj1bdx/airspy-fmradion/tree/main/.claude/skills/architecture into .opencode/skills/architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "architecture", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: architecture
GitHub stars: 168
Token cost: ~588 tokens
SKILL.md length: 154 words
Files: 1
Skills in repo: 2
Repo updated: Sep 30, 2026
First seen: Oct 7, 2026
Licence: GPL-3.0

At a glance

Architecture of airspy-fmradion — signal flow from SDR source to audio output, key type aliases, the Source abstraction, and the FM decoder pipeline.

Works in 7 steps: Optional IQ bandpass filter… → IF AGC (IfSimpleAgc) → Optional multipath filter… → …
Modifying the DSP chain
SKILL.md covers Signal flow, Key type aliases…, Source abstraction and FM decoder pipeline…
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Architecture is an agent skill from jj1bdx/airspy-fmradion. Architecture of airspy-fmradion — signal flow from SDR source to audio output, key type aliases, the Source abstraction, and the FM decoder pipeline. Use when reading or modifying the DSP chain, sources, decoders, buffers, or audio output.

Its SKILL.md is about 590 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It works with Linux and macOS. The repository describes itself as: Software decoder for FM/AM broadcast radio with AirSpy R2 / Mini, Airspy HF+, and RTL-SDR. The licence is GPL-3.0.

When your agent uses it

Modifying the DSP chain

Example prompts

“/architecture”

Workflow steps

7 steps, taken from the first numbered list in SKILL.md.

Optional IQ bandpass filter (LowPassFilterFirIQ)
IF AGC (IfSimpleAgc)
Optional multipath filter (MultipathFilter — normalized LMS, enabled
Phase discriminator → baseband
Audio resampler (r8brain via AudioResampler)
Pilot PLL for stereo detection (PilotPhaseLock, also generates PPS
Stereo L−R demodulation, de-emphasis, DC blocking

What it can do on your machine

Read from SKILL.md and the folder at commit 869753f. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Architecture loads about 588 tokens when it runs. Until then it costs about 63 tokens; SKILL.md has 154 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~63
When it runs · the whole SKILL.md, loaded when a task matches: ~588

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from jj1bdx/airspy-fmradion at commit 869753f, republished under its GPL-3.0 licence (© jj1bdx). 154 words, ~588 tokens.

Download SKILL.mdSave it as .claude/skills/architecture/SKILL.md (or your agent's skills folder).

name: architecture
description: Architecture of airspy-fmradion — signal flow from SDR source to audio output, key type aliases, the Source abstraction, and the FM decoder pipeline. Use when reading or modifying the DSP chain, sources, decoders, buffers, or audio output.

Architecture

Signal flow

SDR hardware / file
    ↓
Source subclass (AirspySource / AirspyHFSource / RtlSdrSource / FileSource)
    ↓  [separate thread, pushes IQSampleVector]
DataBuffer<IQSample>  ← thread-safe queue with condition variable
    ↓  [main thread pulls]
FourthConverterIQ     ← Fs/4 downconversion for zero-IF devices (Airspy HF+, RTL-SDR)
    ↓
IfResampler           ← r8brain-based rational resampler to decoder's target rate
    ↓
FmDecoder / AmDecoder / NbfmDecoder
    ↓  [SampleVector at 48 kHz]
AudioOutput (SndfileOutput or PortAudioOutput)

Key type aliases (include/SoftFM.h)

Alias	Underlying type	Use
`IQSample`	`std::complex<float>`	Raw IF samples
`IQSampleVector`	`std::vector<IQSample>`	Block of IF samples
`IQSampleDecoded`	`float`	Phase-discriminated baseband sample
`Sample`	`double`	Audio sample
`SampleVector`	`std::vector<double>`	Audio block
`IQSampleCoeff`	`std::vector<float>`	FIR filter coefficients for IQ path

Enums also live in SoftFM.h: FilterType, DevType, ModType, OutputMode, PilotState.

Source abstraction

All SDR frontends implement the abstract Source interface (include/Source.h):

configure(string) — parse key=value config string and open device
start(DataBuffer<IQSample>*, atomic_bool*) — begin streaming in a background thread
stop() / is_low_if() / get_sample_rate() / get_frequency()

Low-IF sources (Airspy R2/Mini output real low-IF, not zero-IF) skip the FourthConverterIQ step — controlled by is_low_if().

FM decoder pipeline (sfmbase/FmDecode.cpp)

Inside FmDecoder::process():

Optional IQ bandpass filter (LowPassFilterFirIQ)
IF AGC (IfSimpleAgc)
Optional multipath filter (MultipathFilter — normalized LMS, enabled with -E)
Phase discriminator → baseband
Audio resampler (r8brain via AudioResampler)
Pilot PLL for stereo detection (PilotPhaseLock, also generates PPS events)
Stereo L−R demodulation, de-emphasis, DC blocking

Files

Just SKILL.md in .claude/skills/architecture of jj1bdx/airspy-fmradion.

Open the folder on GitHubat commit 869753f

Compare with similar skills

Architecture next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Architecture compared with similar skills
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Engine Whats Newflutter/flutter	179k	—	~978	Automated safety check: Pass	BSD-3-Clause	today
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Native Feel Cross Platform Desktopyetone/native-feel-skill	1.9k	1 repos	~1.5k	Automated safety check: Pass	MIT	4 mo ago
TreeSheets Agent Socketaardappel/treesheets	3.2k	—	~5.7k	Automated safety check: Notes	Zlib	today

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Questions about Architecture

What does Architecture do?

Architecture of airspy-fmradion — signal flow from SDR source to audio output, key type aliases, the Source abstraction, and the FM decoder pipeline. Architecture is an agent skill from jj1bdx/airspy-fmradion. Architecture of airspy-fmradion — signal flow from SDR source to audio output, key type aliases, the Source abstraction, and the FM decoder pipeline.

When should I use Architecture?

Architecture fits situations like: modifying the DSP chain.

How do I install Architecture in Claude Code?

Run `npx skills add jj1bdx/airspy-fmradion --skill architecture -a claude-code`. Or copy the skill folder (.claude/skills/architecture in jj1bdx/airspy-fmradion) into .claude/skills/architecture in your project. Claude Code loads it when a task matches its description.

How do I install Architecture in Codex?

Run `npx skills add jj1bdx/airspy-fmradion --skill architecture -a codex`. Or copy the skill folder (.claude/skills/architecture in jj1bdx/airspy-fmradion) into .agents/skills/architecture in your project. Codex loads it when a task matches its description.

Can I use Architecture in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add jj1bdx/airspy-fmradion --skill architecture -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/architecture, .gemini/skills/architecture, .github/skills/architecture and .opencode/skills/architecture in your project.

What does Architecture need to run?

SKILL.md names no scripts, command-line tools or credentials: Architecture is instructions for the agent only.

Does Architecture access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Architecture safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Architecture use?

Architecture is published under the GPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Architecture use?

About 588 tokens (SKILL.md is roughly 2.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Architecture?

Skills that share tags, products or a category with Architecture: Engine Whats New (flutter/flutter, 179k stars), Openclaw Live Updater (openclaw/openclaw, 392k stars), Apple Container Test Runner (RustPython/RustPython, 22k stars) and Native Feel Cross Platform Desktop (yetone/native-feel-skill, 1.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Architecture?

jj1bdx (a GitHub user) maintains it in jj1bdx/airspy-fmradion, which has 168 GitHub stars. The repository holds 2 skills in this directory. The repository was last updated on September 30, 2026.

Source: jj1bdx/airspy-fmradion on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Architecture

Install Architecture

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Architecture

Signal flow

Key type aliases (include/SoftFM.h)

Source abstraction

FM decoder pipeline (sfmbase/FmDecode.cpp)

Files

Compare with similar skills

Similar skills

Engine Whats New

Openclaw Live Updater

Apple Container Test Runner

Native Feel Cross Platform Desktop

TreeSheets Agent Socket

Open Computer Use

More from jj1bdx/airspy-fmradion

Format

Questions about Architecture

Install Architecture

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Architecture

Signal flow

Key type aliases (include/SoftFM.h)

Source abstraction

FM decoder pipeline (sfmbase/FmDecode.cpp)

Files

Compare with similar skills

Similar skills

Engine Whats New

Openclaw Live Updater

Apple Container Test Runner

Native Feel Cross Platform Desktop

TreeSheets Agent Socket

Open Computer Use

More from jj1bdx/airspy-fmradion

Format

Related

Questions about Architecture