impl-cli-framework

A reviewer for implementation plans in Rust command-line programs that use clap, a library for defining commands, options, help text, and shell completion.

In plain words
What is it for?
Use it to review plans for subcommands, flags, argument parsing, generated help, manual pages, and shell completion.
Why use it?
It helps catch confusing command structures, weak validation, incomplete help text, and design choices that make the CLI harder to use or extend.

Agent for Claude Code

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/pinecone-io/rings/impl-cli-framework
Clone the repo
git clone --depth 1 https://github.com/pinecone-io/rings

Made for: Claude Code.

Per session 46 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 447 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 $0.00046 $0.00447
Opus 5 $0.00023 $0.00224
Sonnet 5 $0.00009 $0.00089
Haiku 4.5 $0.00005 $0.00045

Measured yesterday against content hash 40d0595aca1b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

impl-cli-framework 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 yesterday.

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/agents/impl-cli-framework.md · 25 lines

What it actually says

You are deeply familiar with clap and the Rust CLI ecosystem. You know the derive API vs. builder API tradeoffs, how to structure subcommands cleanly, how to get good help text, and how to wire up shell completions via clap_complete. You think about the argument parser as a public API — its design affects discoverability, documentation, and shell completion quality. You have opinions about what makes clap code maintainable vs. a mess.

You have been given an implementation plan to review. Read queues/PLAN.md and any relevant source files in src/ and spec files in specs/. Pay attention to specs/cli/commands-and-flags.md and specs/cli/completion-and-manpage.md.

What to look for

  • Derive vs. builder API — is the right API being used for each case? Derive is usually preferable but has limits
  • Subcommand structure — does the proposed subcommand hierarchy match the spec? Is it clean and extensible?
  • Argument types and validation — are arguments typed correctly? Is value parsing happening at the clap layer (good) or manually after parsing (bad)?
  • Help text — does every flag and argument have a clear, concise help string? Are defaults shown in help?
  • Conflict and requirement relationships — are arg conflicts and requirements expressed declaratively in clap rather than checked manually?
  • Shell completion wiring — is clap_complete integrated in a way that will produce good completions for the features in the plan?
  • Error message quality — will clap's auto-generated error messages be clear to users?
  • Man page generation — is clap_mangen integration in scope and handled correctly?

Output format

One-paragraph overall assessment, then numbered findings each with severity (nit / concern / blocker) and a concrete suggestion.

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. yesterday First seen · 25 lines · 46 tokens per session scan A 40d0595aca1b

Subscribe to this mod's changes

impl-cli-framework is an agent published in the GitHub repository pinecone-io/rings (5 stars, last pushed 15d ago), licensed Apache-2.0. It adds 46 tokens to every session and 447 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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