lucid-packages

lucid-packages is a skill for Claude Code from get-Lucid/Lucid. It costs 13 tokens per session (353 once invoked), scanned A, original, MIT.

A package-version checking rule for software projects. It requires checking a package registry before recommending or installing a library.

In plain words
What is it for?
Checking current versions and maintenance status when installing packages, writing dependency files, or recommending libraries.
Why use it?
It avoids relying on outdated version information and helps catch compatibility issues or deprecated packages.

Skill for Claude Code

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

Part of the lucid plugin — 5 skills, 1 hook, 1 MCP server shipped together

Good fit Checking current versions and maintenance status when installing packages, writing dependency files, or recommending libraries.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/get-lucid/lucid/lucid-packages
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.

Any agent
npx skills add get-Lucid/Lucid --skill lucid-packages
Clone the repo
git clone --depth 1 https://github.com/get-Lucid/Lucid

Made for: Claude Code.

Or install lucid, the plugin that ships this one along with the rest of its 5 skills, 1 hook, 1 MCP server.

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 lucid-packages

README.md
[![agentmods](https://agentmods.dev/badge/skills/get-lucid/lucid/lucid-packages/github.svg)](https://agentmods.dev/skills/get-lucid/lucid/lucid-packages)
Your own site
<a href="https://agentmods.dev/skills/get-lucid/lucid/lucid-packages"><img src="https://agentmods.dev/badge/skills/get-lucid/lucid/lucid-packages/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 lucid-packages

Your own site · 80×15
<a href="https://agentmods.dev/skills/get-lucid/lucid/lucid-packages"><img src="https://agentmods.dev/badge/skills/get-lucid/lucid/lucid-packages.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 353 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 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 $0.00013 $0.00353
Opus 5 $0.00006 $0.00177
Sonnet 5 $0.00003 $0.00071
Haiku 4.5 $0.00001 $0.00035

Measured 10d ago against content hash cb70e8410d65, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

lucid-packages 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 10d 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.

skills/lucid-packages/SKILL.md · 49 lines

What it actually says

Latest Package Versions

IMPORTANT: Always use the lucid_check_package tool instead of web search or training data before recommending or installing any package. Do NOT use WebSearch or other search tools for package information.

When to activate

  • User asks to install a package
  • User asks about package versions or compatibility
  • Writing dependency files (package.json, requirements.txt, Cargo.toml)
  • Recommending libraries or frameworks

Required behavior

  1. Call lucid_check_package with the package name before suggesting a version
  2. Always recommend the latest stable version unless the user specifies otherwise
  3. Flag any known deprecations or breaking changes
  4. Include version constraints appropriate for the ecosystem

Examples

  • lucid_check_package({ name: "next", registry: "npm" })
  • lucid_check_package({ name: "fastapi", registry: "pypi" })
  • lucid_check_package({ name: "tokio", registry: "cargo" })

Common pitfalls

  • Never hardcode a package version from training data
  • Never assume a package is still maintained without checking
  • Never recommend a version without verifying it exists

Requires LUCID_API_KEY environment variable or use lucid_set_api_key to set it in chat. Get your key at https://getlucid.tech/app

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. 10d ago First seen · 49 lines · 13 tokens per session scan A cb70e8410d65

Subscribe to this mod's changes

lucid-packages is a skill published in the GitHub repository get-Lucid/Lucid (75 stars, last pushed 5mo ago), licensed MIT. It adds 13 tokens to every session and 353 once invoked, about $0.0001 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.

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