A development guide for building Java and Kotlin services with the Kora Framework 2.0, including its framework-specific patterns and tools.

It supports starting, changing, and maintaining Kora microservices, including application setup, dependency injection, HTTP, databases, messaging, and service interfaces.

It helps an agent follow Kora's rules and APIs instead of treating the framework like a generic Java or Kotlin project.

kora-v2 — Skill for Claude Code by kora-projects/kora-skills

Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo

git clone --depth 1 https://github.com/kora-projects/kora-skills

agentmods

npx agentmods add skills/kora-projects/kora-skills/kora-v2

Made for: Claude Code.

Or install kora-v2, the plugin that ships this one along with the rest of its 2 skills.

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/skills/kora-projects/kora-skills/kora-v2/github.svg)](https://agentmods.dev/skills/kora-projects/kora-skills/kora-v2)

Your own site

<a href="https://agentmods.dev/skills/kora-projects/kora-skills/kora-v2"><img src="https://agentmods.dev/badge/skills/kora-projects/kora-skills/kora-v2/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/skills/kora-projects/kora-skills/kora-v2"><img src="https://agentmods.dev/badge/skills/kora-projects/kora-skills/kora-v2.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 337 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 9,154 The whole file, excluding the scripts and references it only reads on demand.

Security scan C 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	$0.00337	$0.09154
Opus 5.5	$0.00135	$0.03662
Sonnet 5.5	$0.00067	$0.01831
Haiku 4.5	$0.00034	$0.00915

Measured 21d ago against content hash cb723a026e6c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

kora-v2 scanned grade C 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 21d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (install.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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf .kora-agent/kora-source-2.0/.git .kora-agent/kora-examples-2.0/.git .kora-agent/kora-docs-2.0/.git

plugins/kora-v2/SKILL.md · 436 lines

How it starts

The opening of the file, as written. The whole thing — 436 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Kora Framework 2.0 — Meta-skill

Single entry point for all Kora 2.0 development. This file is routing and rules only — the implementation knowledge lives in the 40 sub-skills listed below.


Framework	Kora 2.0, group `io.koraframework`, BOM `io.koraframework:kora-bom`
Version	`2.0.0.RC2`. `2.0.0-SNAPSHOT` is the `master` development line and needs a snapshot repository
Java	25 minimum. Kora 2.0 artifacts are compiled to class-file 69; older JVMs cannot load them
Gradle JVM	The JDK running Gradle itself must also be ≥ 25 when `io.koraframework:openapi-generator` is on the buildscript classpath
Kotlin	2.4.20 with KSP 2.3.12 — the versions the framework itself is built with
Build	Gradle 9.8.0 (the wrapper the framework itself pins)
Docs	koraframework.io/v2/en (ru) — see R0 for how much to trust it
Synced with	Kora tag `2.0.0.RC2` = `master` at `78351e1cf` (2026-10-02)

This meta-skill is the single entry point for Kora Framework development. It routes to 40 specialized domain skills, each with its own narrow area of expertise.

Read this file first when:

Starting a new Kora 2.0 microservice project from scratch (Java or Kotlin)
Adding or refactoring a @KoraApp application graph with *Module interfaces
Choosing which Kora modules to plug in (HTTP, Database, Kafka, gRPC, SOAP, S3, Telemetry)
Debugging DI container issues ("dependency not found", ambiguous bindings, graph build failures)
Configuring typed config with @ConfigSource / @ConfigMapper and environment substitution
Planning a multi-module Gradle project with @KoraSubmodule boundaries
Migrating an existing Kora 1.x service — see §6

1. Operating rules

Four rules. They apply to every Kora task, on every turn, from the first message. Each is stated once — here.

R0 is a gate: satisfy it before doing anything else. R1–R3 govern the work itself.

Read the full file on GitHub · 436 lines

Files

What ships with it

60 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.

21d ago Changed · +40 lines · +7 tokens per session cb723a026e6c
1mo ago First seen · 396 lines · 330 tokens per session scan C 691cf6ff36a2

Subscribe to this mod's changes

kora-v2 is a skill published in the GitHub repository kora-projects/kora-skills (2 stars, last pushed 21d ago), licensed Apache-2.0. It adds 337 tokens to every session and 9,154 once invoked, about $0.0013 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.

Backend and APIs Java Kotlin and Swift Languages blazing-fast compile-time framework kora proxy-free reflection-free

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kora-v2

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade C, and why

Recursive force deletehighDestructive command

How it starts

Kora Framework 2.0 — Meta-skill

1. Operating rules

What ships with it

What this file has done since we first saw it

Other skills, from other repositories

authoring-java-sdk-tasks

null-safety

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backend-microservice-development

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