lsp-design

lsp-design is a skill for Claude Code from revfactory/claude-code-harness. It costs 42 tokens per session (653 once invoked), scanned A, original, no licence file.

A guide to implementing a Language Server Protocol (LSP) server, the software that gives code editors features such as completion, diagnostics, and definition lookup.

In plain words
What is it for?
It is for implementing LSP servers with autocomplete, error diagnostics, go-to-definition, and hover information.
Why use it?
It provides direction for building editor-language support, including incremental parsing and common editor features.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Good fit It is for implementing LSP servers with autocomplete, error diagnostics, go-to-definition, and hover information.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/revfactory/claude-code-harness/lsp-design
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 revfactory/claude-code-harness --skill lsp-design
Clone the repo
git clone --depth 1 https://github.com/revfactory/claude-code-harness

Made for: Claude Code.

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-design

README.md
[![agentmods](https://agentmods.dev/badge/skills/revfactory/claude-code-harness/lsp-design/github.svg)](https://agentmods.dev/skills/revfactory/claude-code-harness/lsp-design)
Your own site
<a href="https://agentmods.dev/skills/revfactory/claude-code-harness/lsp-design"><img src="https://agentmods.dev/badge/skills/revfactory/claude-code-harness/lsp-design/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 lsp-design

Your own site · 80×15
<a href="https://agentmods.dev/skills/revfactory/claude-code-harness/lsp-design"><img src="https://agentmods.dev/badge/skills/revfactory/claude-code-harness/lsp-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 653 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 $0.00042 $0.00653
Opus 5 $0.00021 $0.00327
Sonnet 5 $0.00008 $0.00131
Haiku 4.5 $0.00004 $0.00065

Measured 12d ago against content hash 6508bf170174, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-15, from the pricing page.

Security

Grade A, and why

lsp-design 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 12d 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.

experiments/results/case-015/harness/.claude/skills/lsp-design/SKILL.md · 77 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

2 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. 12d ago First seen · 77 lines · 42 tokens per session scan A 6508bf170174

Subscribe to this mod's changes

lsp-design is a skill published in the GitHub repository revfactory/claude-code-harness (119 stars, last pushed 6mo ago), with no licence file. It adds 42 tokens to every session and 653 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 2026-09-03.

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