lsp-code-analysis

lsp-code-analysis is a skill for Claude Code, Codex from lsp-client/lsp-skill. It costs 46 tokens per session (2,841 once invoked), scanned A, original, MIT.

A code-navigation and analysis tool based on the Language Server Protocol, a standard that lets editors understand programming languages. It can work with definitions, references, implementations, file outlines, and refactorings.

In plain words
What is it for?
Use it to explore code, jump to definitions, find references, trace implementations, inspect file structure, and preview safe refactoring changes.
Why use it?
It helps you understand an unfamiliar codebase without relying only on text searches. Its language-aware view can distinguish symbols such as functions, classes, and types.

Skill for Claude CodeCodex

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 skills/lsp-client/lsp-skill/lsp-code-analysis
Any agent
npx skills add lsp-client/lsp-skill --skill lsp-code-analysis
Clone the repo
git clone --depth 1 https://github.com/lsp-client/lsp-skill

Made for: Claude Code, Codex.

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 lsp-code-analysis

README.md
[![agentmods](https://agentmods.dev/badge/skills/lsp-client/lsp-skill/lsp-code-analysis.svg)](https://agentmods.dev/skills/lsp-client/lsp-skill/lsp-code-analysis)
Your own site
<a href="https://agentmods.dev/skills/lsp-client/lsp-skill/lsp-code-analysis"><img src="https://agentmods.dev/badge/skills/lsp-client/lsp-skill/lsp-code-analysis.svg" alt="Measured on agentmods" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,841 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 $0.02841
Opus 5 $0.00023 $0.01421
Sonnet 5 $0.00009 $0.00568
Haiku 4.5 $0.00005 $0.00284

Measured 4d ago against content hash 8392095478e7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

lsp-code-analysis 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 4d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/update.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/lsp-code-analysis/SKILL.md · 342 lines

How it starts

The opening of the file, as written. The whole thing — 342 lines — stays where its author put it; the contents beside it link to each section on GitHub.

LSP Code Analysis

IMPORTANT: PREREQUISITE

To use this skill, you MUST follow these steps:

  1. Check for updates: Run the update script to ensure you are using the latest version of the tool.
  2. Verify project support: Run lsp server start <project_path> to start the LSP server and confirm the project is supported.

IF YOU DO NOT PERFORM THESE STEPS, YOU ARE NOT ALLOWED TO USE THIS SKILL.

Abstract

This document specifies the operational requirements and best practices for the lsp-code-analysis skill. It provides a semantic interface to codebase navigation, analysis and refactoring via the Language Server Protocol (LSP).

Overview

You are provided with lsp CLI tool for semantic code navigation and analysis. It SHOULD be preferred over read or grep for most code understanding tasks.

Usages:

  • Semantic navigation: Jump to definitions, find references, locate implementations - understands code structure, not just text patterns.
  • Language-aware: Distinguishes between variables, functions, classes, types - eliminates false positives from text search.
  • Cross-file intelligence: Trace dependencies, refactor safely across entire codebase - knows what imports what.
  • Type-aware: Get precise type information, signatures, documentation - without reading implementation code.

Tool Selection

Guideline: You SHOULD prioritize LSP commands for code navigation and analysis. Agents MAY use read or grep ONLY when semantic analysis is not applicable (e.g., searching for comments or literal strings).

Task Traditional Tool Recommended LSP Command
Find Definition grep, read definition
Find Usages grep -r reference
Understand File read outline
View Docs/Types read doc
Refactor sed See Refactoring Guide

Read the full file on GitHub · 342 lines

Files

What ships with it

8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 4d ago First seen · 342 lines · 46 tokens per session scan A 8392095478e7

Subscribe to this mod's changes

lsp-code-analysis is a skill published in the GitHub repository lsp-client/lsp-skill (119 stars, last pushed 6mo ago), licensed MIT. It adds 46 tokens to every session and 2,841 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 2026-08-30.

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