r-spec

r-spec is a command for Claude Code from rfxn/rdf. It costs 0 tokens per session (5,832 once invoked), scanned A, original, GPL-2.0.

A command that turns an early feature or design idea into a detailed technical specification through research and discussion. A technical specification describes how a proposed system or change should work.

In plain words
What is it for?
Use it when starting a new feature, subsystem, or significant design change that needs an architecture-level plan.
Why use it?
It helps clarify requirements and architecture before implementation, reducing the risk of building from an incomplete idea. The description does not provide further details about its exact prompts or output.

Command for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the rdf plugin — 37 skills, 37 commands, 6 agents, 6 hooks shipped together

Good fit Use it when starting a new feature, subsystem, or significant design change that needs an architecture-level plan.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/rfxn/rdf/r-spec
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.

Clone the repo
git clone --depth 1 https://github.com/rfxn/rdf

Made for: Claude Code.

Or install rdf, the plugin that ships this one along with the rest of its 37 skills, 37 commands, 6 agents, 6 hooks.

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 r-spec

README.md
[![agentmods](https://agentmods.dev/badge/commands/rfxn/rdf/r-spec/github.svg)](https://agentmods.dev/commands/rfxn/rdf/r-spec)
Your own site
<a href="https://agentmods.dev/commands/rfxn/rdf/r-spec"><img src="https://agentmods.dev/badge/commands/rfxn/rdf/r-spec/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 r-spec

Your own site · 80×15
<a href="https://agentmods.dev/commands/rfxn/rdf/r-spec"><img src="https://agentmods.dev/badge/commands/rfxn/rdf/r-spec.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 5,832 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 unknown 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 $0.00000 $0.05832
Opus 5 $0.00000 $0.02916
Sonnet 5 $0.00000 $0.01166
Haiku 4.5 $0.00000 $0.00583

Measured 5d ago against content hash c7621d8ba477, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

r-spec 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 5d 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.

canonical/commands/r-spec.md · 695 lines

The source is not reproduced here

Licensed GPL-2.0

The repository is licensed GPL-2.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 5d ago Changed · -5 lines · -26 tokens per session c7621d8ba477
  2. 9d ago First seen · 700 lines · 26 tokens per session scan A f6b559057fdb

Subscribe to this mod's changes

r-spec is a command published in the GitHub repository rfxn/rdf (19 stars, last pushed 6d ago), licensed GPL-2.0. It costs nothing until one of its globs matches a file; then it loads 5,832 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.