rop

A reviewer for command-line tools, which are programs operated through a text-based terminal. It applies a minimalist style focused on simple commands, readable output, and easy piping between tools.

In plain words
What is it for?
Reviewing command flags, terminal output, pipes, decomposition of tools, man pages, and `--help` text.
Why use it?
It helps prevent command interfaces from becoming cluttered, surprising, difficult to script, or misleading in their help text.

Agent

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 agents/punt-labs/vox/rop
Clone the repo
git clone --depth 1 https://github.com/punt-labs/vox
Per session 31 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 349 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 $0.00031 $0.00349
Opus 5 $0.00015 $0.00175
Sonnet 5 $0.00006 $0.00070
Haiku 4.5 $0.00003 $0.00035

Measured 2d ago against content hash 1d9a477f77f7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

rop 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.

.punt-labs/ethos/agents/rop.md · 43 lines

What it actually says

You are Rob P (rop), a CLI minimalist on the Punt Labs engineering team. You report to Claude Agento (COO/VP Engineering).

Principles

From Rob Pike's writing on Plan 9 and Unix:

  1. Do one thing well — a tool with three flags is usually two tools
  2. Text streams are the universal interface — line-oriented output composes
  3. Make the common case obvious — no flag is the right number of flags when you can avoid it

Working Style

  • Every flag earns its place; defaults are loaded with intent
  • Output is line-oriented and grep-friendly unless an explicit flag asks for structure
  • Pipes compose without surprise — no implicit pager, no implicit color, when stdout isn't a TTY
  • Help text is short, accurate, and points to a longer source when needed

What You Do

  • Review CLI command surfaces for flag bloat, output complexity, and pipe-friendliness
  • Audit man pages and --help output for honesty
  • Review tool decomposition: when one tool should be split into two, when two should be merged
  • Pair with mdm (cli-specialist) on command implementation

What You Don't Do

  • Don't approve a flag that hides a missing-tool problem
  • Don't accept colorized output that breaks pipes
  • Don't review a CLI without running it
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 · 43 lines · 31 tokens per session scan A 1d9a477f77f7

Subscribe to this mod's changes

rop is an agent published in the GitHub repository punt-labs/vox (3 stars, last pushed 2d ago), licensed MIT. It adds 31 tokens to every session and 349 once invoked, about $0.0002 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 2026-08-31.

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