What is jvm-source-lens CLAUDE.md?

Repository instructions for JVM Source Lens, a command-line and MCP tool that finds a Java or other JVM project's classpath and source code. The classpath is the set of libraries and project files available to the program.

They guide work on the Node and Bun toolchain, Gradle-based builds, tests, packaging, documentation, and the CLI and MCP server.

They give coding agents the project's required workflow, tools, documentation rules, and build checks so changes match the repository.

How Sintexer/jvm-source-lens configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to Sintexer/jvm-source-lens. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/Sintexer/jvm-source-lens/master/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/Sintexer/jvm-source-lens

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/sintexer/jvm-source-lens/claude-md/github.svg)](https://agentmods.dev/instructions/sintexer/jvm-source-lens/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/sintexer/jvm-source-lens/claude-md"><img src="https://agentmods.dev/badge/instructions/sintexer/jvm-source-lens/claude-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/sintexer/jvm-source-lens/claude-md"><img src="https://agentmods.dev/badge/instructions/sintexer/jvm-source-lens/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 2,203 This file is loaded in full into every session.

When invoked 2,203 The same file — it is already loaded in full.

Security scan A 1 finding. 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.

Model	Per session	Once invoked
Fable 5.1	$0.02203	$0.02203
Opus 5.5	$0.00881	$0.00881
Sonnet 5.5	$0.00441	$0.00441
Haiku 4.5	$0.00220	$0.00220

Measured 1mo ago against content hash 7f069c48dc8d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

jvm-source-lens CLAUDE.md scanned grade A with 1 finding 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 1mo 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

Bun-specific preferences for new code: use `Bun.spawn` / `Bun.file` over `node:child_process` / `node:fs` where convenient; `bun:test` (`import { test, expect } from "bun:test"`); no `dotenv` (Bun loads `.env` automatica

CLAUDE.md · 78 lines

How it starts

The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project

JVM Source Lens (jvmsrc) — a CLI + MCP server that resolves a JVM project's actual classpath by invoking the build tool (Gradle first), then extracts Java source for a fully-qualified class (sources JAR preferred, CFR decompilation fallback planned).

User-facing overview: README.md. Authoritative spec: SPEC.md. Implementation status: ROADMAP.md. Update SPEC when behavior or schemas change; update README for install/usage; check off ROADMAP when shipping features.

Toolchain

Runtime: Node ≥20 for published CLI (esbuild --target=node20); CI smoke-tests 20 and 24. Bun for this repo (see CONTRIBUTING.md).

bun run build — esbuild → dist/ (--target=node20)
bun test / bun run dev:cli / dev:mcp
bun run prepack — typecheck + build + validate bundled resources

The published bin (jvmsrc) and main both point at dist/, so a build is required before npm pack / install testing.

Bun-specific preferences for new code: use Bun.spawn / Bun.file over node:child_process / node:fs where convenient; bun:test (import { test, expect } from "bun:test"); no dotenv (Bun loads .env automatically).

Test layout

Three tiers, all run with bun test:

Location	Kind	Gradle needed?
`src/*/.test.ts`	Unit tests, co-located with source	No
`test/fixtures/`	Fast regression with synthetic `ResolutionOutput`	No (wrapper JAR optional for local Gradle debugging)
`test/scenarios/`	Real-Gradle scenario tests	Yes — wrapper JARs required (gitignored)

Gradle smoke fixture

Fast tests in test/fixtures/gradle-smoke-fixture.test.ts exercise inter-project get / class-search paths using synthetic ResolutionOutput that points at the committed test/fixtures/gradle-smoke tree — no gradlew in CI (bun test stays under a few seconds for that file).

Read the full file on GitHub · 78 lines

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.

1mo ago Changed · +1 lines · +69 tokens per session 7f069c48dc8d
2mo ago First seen · 77 lines · 2,134 tokens per session scan A 3bb49d042976

Subscribe to this mod's changes

jvm-source-lens CLAUDE.md is an instructions file published in the GitHub repository Sintexer/jvm-source-lens (4 stars, last pushed today), licensed MIT. It adds 2,203 tokens to every session, about $0.0088 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

jvm-source-lens CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
jvm-source-lens CLAUDE.mdSintexer/jvm-source-lens	Instructions file	4	today	MIT	A	2,203	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,649	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode ai-customization.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	1,907	GitHub Copilot

jvm-source-lens: Instructions file for Claude Code