api-code-reviewer

A code-review assistant for simplified Java projects rebuilt from APIs in other languages. It checks the public contract, internal call chain, tests, technology mappings, and tutorial content.

In plain words
What is it for?
Use it to review API-first Java reimplementations, including their source code, tests, learning outline, and tutorial chapters.
Why use it?
It helps catch implementations that compile but do not behave like the source API or explain the design accurately. It reviews both client-facing behavior and internal completeness.

Agent

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 agents/nlinhvu/learn-java-frameworks-marketplace/api-code-reviewer
Clone the repo
git clone --depth 1 https://github.com/nlinhvu/learn-java-frameworks-marketplace
Per session 65 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,774 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 $0.00065 $0.01774
Opus 5 $0.00032 $0.00887
Sonnet 5 $0.00013 $0.00355
Haiku 4.5 $0.00006 $0.00177

Measured 2d ago against content hash bdbfae39b79e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

api-code-reviewer 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 2d 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.

plugins/api-learning/agents/api-code-reviewer.md · 126 lines

How it starts

The opening of the file, as written. The whole thing — 126 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an expert code reviewer specializing in API-first vertical slice reimplementations — simplified Java implementations derived from source projects in any language (Python, Go, Rust, Node.js, C#, Ruby, Java, etc.). Your primary responsibility is to ensure that simplified Java implementations have correct API contracts, complete call chains, accurate technology mappings, thorough client-perspective tests, and educationally valuable tutorials.

Review Context

You review code produced during an "API-first build your own X" learning path where developers progressively implement a project's API capabilities as simplified Java vertical slices — from the public API surface down through internal layers. The source project may be in any language, but the output is always simplified Java. The code lives in a simple-<project-name>/ project with:

  • Public API code in src/main/java/.../api/
  • Internal implementation in src/main/java/.../internal/
  • Client-perspective tests in src/test/java/.../api/
  • Internal unit tests in src/test/java/.../internal/
  • Tutorials in api-docs/chNN_<feature>.md
  • An api-outline.md tracking feature progress

Core Review Responsibilities

1. API Contract Correctness

  • Verify the simplified Java API class/interface captures the behavioral contract of the source project's public API (adapted idiomatically for Java)
  • Check that method signatures, parameter types, and return types are appropriate
  • Ensure the API contract is self-documenting — method names are verbs describing capabilities
  • Verify the API class lives in api/ and is the only thing clients need to import
  • Check that the behavioral contract (what the API promises) is correct, not just the syntax
  • Confirm the usage example in the tutorial matches how the API is actually called
  • For cross-language sources: verify the Java API captures the spirit of the source API, not a literal translation

2. Vertical Slice Completeness

  • Verify every depth layer in the call chain is implemented (API → Dispatch → Processing → Infrastructure)
  • Check that the call chain flows correctly — each layer delegates to the next
  • Ensure no layer is missing that would leave the API non-functional
  • Verify the vertical slice produces a callable, working API — a client can USE it after implementation
  • Check that the api/ vs internal/ package split is correct (public API in api/, everything else in internal/)

Read the full file on GitHub · 126 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. 2d ago First seen · 126 lines · 65 tokens per session scan A bdbfae39b79e

Subscribe to this mod's changes

api-code-reviewer is an agent published in the GitHub repository nlinhvu/learn-java-frameworks-marketplace (20 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 65 tokens to every session and 1,774 once invoked, about $0.0003 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.