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langchain4j-cdi: Instructions file for GitHub Copilot

.github/copilot-instructions.md

langchain4j-cdi copilot-instructions.md is an instructions file for GitHub Copilot from langchain4j/langchain4j-cdi. It costs 1,834 tokens per session, scanned A, original, Apache-2.0.

A set of project instructions for LangChain4J CDI, a Java library that connects AI application components with Jakarta CDI and MicroProfile.

In plain words
What is it for?
Use it to prepare the required tools, compile the project, run validation, install modules, and work with its examples.
Why use it?
It gives developers a consistent setup and build process for working on this Java project.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is langchain4j/langchain4j-cdi's own configuration. It tells GitHub Copilot how to work on langchain4j-cdi itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything langchain4j-cdi configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is ../../mvnw quarkus:dev.

not rated 19repo 2d ago A scan 1,834 tokens original Apache-2.0
View source ↗ langchain4j/langchain4j-cdi
Reuse

Borrowing it

Nothing to install: this file belongs to langchain4j/langchain4j-cdi. 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/langchain4j/langchain4j-cdi/main/.github/copilot-instructions.md
Clone the repo
git clone --depth 1 https://github.com/langchain4j/langchain4j-cdi

Made for: GitHub Copilot.

Wrote this? Show the measurements

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README.md
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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.

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Per session 1,834 This file is loaded in full into every session.
When invoked 1,834 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01834 $0.01834
Opus 5.5 $0.00734 $0.00734
Sonnet 5.5 $0.00367 $0.00367
Haiku 4.5 $0.00183 $0.00183

Measured 2mo ago against content hash 3948940eb682, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

langchain4j-cdi copilot-instructions.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 2mo 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s "http://localhost:8080/q/openapi" | grep -q "openapi"
.github/copilot-instructions.md · 193 lines

How it starts

The opening of the file, as written. The whole thing — 193 lines — stays where its author put it; the contents beside it link to each section on GitHub.

LangChain4J CDI Integration

LangChain4J CDI is a Java library that integrates LangChain4J with CDI (Jakarta EE and Eclipse MicroProfile). It provides CDI extensions for building AI-powered applications using Java, Maven, and various application servers.

Always reference these instructions first and fallback to search or bash commands only when you encounter unexpected information that does not match the info here.

Working Effectively

Prerequisites

  • Java 17 (OpenJDK Temurin recommended)
  • Maven 3.9.11+ (use ./mvnw wrapper included in the repository)
  • Docker or Podman (for running examples with Ollama)

Bootstrap and Build

Run these commands in sequence for first-time setup:

  1. Basic build (core modules only):

    ./mvnw -B clean compile -DskipTests -pl '!examples/payara-car-booking'

    Takes ~1 minute. NEVER CANCEL. Set timeout to 5+ minutes.

  2. Full build with formatting validation:

    ./mvnw -B formatter:validate verify -pl '!examples/payara-car-booking'

    Takes ~2 minutes. NEVER CANCEL. Set timeout to 10+ minutes.

  3. Install modules to local repository:

    ./mvnw -B clean install -DskipTests -pl '!examples/payara-car-booking'

    Takes ~1 minute. NEVER CANCEL. Set timeout to 5+ minutes.

Essential Commands

  • Format and validate code style:

    ./mvnw -B -B spotless:check -pl '!examples/payara-car-booking'

    Takes ~30 seconds.

  • Format code (auto-fix):

    ./mvnw -B spotless:apply -pl '!examples/payara-car-booking'

    Takes ~30 seconds.

  • Run unit tests:

    ./mvnw -B clean test -pl '!examples/payara-car-booking,!langchain4j-cdi-integration-tests'

    Takes ~1.5 minutes. NEVER CANCEL. Set timeout to 8+ minutes.

  • Run all tests including integration:

    ./mvnw -B clean test -pl '!examples/payara-car-booking'

    Takes ~2 minutes. NEVER CANCEL. Set timeout to 10+ minutes.

  • Check dependencies:

    ./mvnw dependency:analyze -pl langchain4j-cdi-core

Read the full file on GitHub · 193 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.

  1. 2mo ago First seen · 193 lines · 1,834 tokens per session scan A 3948940eb682

Subscribe to this mod's changes

langchain4j-cdi copilot-instructions.md is an instructions file published in the GitHub repository langchain4j/langchain4j-cdi (19 stars, last pushed 2d ago), licensed Apache-2.0. It adds 1,834 tokens to every session, about $0.0073 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-01.

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