Four open source projects, documented from their code.

Guides and reference for four projects by Jean Carlo Benites Porras. Every page comes from the source, the tests and the build files of its repository, and each example names the classes, options or endpoints it uses so you can check it there.

58tests in spring-idempotencyJUnit, src/test. 15 of the 69 runs need Docker
24tests in spring-gotenberg-reportsJUnit, src/test. 6 need Docker
27tests in ngx-sse-resourceVitest, one spec file
41tests in share-linksnode --test, four files

Test cases in each repository, counted in the source on 11 November 2026.

spring-idempotency
Idempotency-Key support for Spring Boot MVC. A client retries a POST or PATCH with the same key and the server replays the first response instead of running the handler again.
Quick start Source
Entry
@Idempotent
Kind
Library
Runs on
Java 21, Spring Boot 4.1
Version
0.1.0-SNAPSHOT
spring-gotenberg-reports
PDF reports from Thymeleaf HTML templates, rendered by Gotenberg. Long reports are split into sections, rendered in parallel and merged, with progress over Server-Sent Events.
Quick start Source
Entry
GET /api/reports/{type}/{id}
Kind
Reference application
Runs on
Java 21, Spring Boot 4.1, Gotenberg 8
Version
0.1.0-SNAPSHOT
ngx-sse-resource
Server-Sent Events as Angular signals. One function opens an EventSource, keeps the last event in a signal, reconnects with exponential backoff and closes with its component.
Quick start Source
Entry
sseResource()
Kind
Library
Runs on
Angular 22
Version
0.1.0
share-links
A small HTTP service for short links to URL-fragment state and for image uploads with delete tokens. One Node process, standard library only.
Quick start Source
Entry
POST /api/links
Kind
Self-hosted service
Runs on
Node 24, no dependencies
Version
1.0.0

Two Go libraries by the same author have their own documentation site at libs.clx.pe.

brackets
Tournament formats for Go: seeding, brackets, byes, Swiss pairings, round robins, group stages and multi-stage flows.
Go
hashchain
An append-only, tamper-evident log for Go. Every entry commits to the hash of the entry before it.
Go

Written from the code and tests of each repository. If a page and the code disagree, the code is right and the page has a bug. Open an issue.

@Idempotent · IdempotencyStore · GET /api/reports/{type}/{id} · SseConnectionError · storage_full · Idempotency-Key · GotenbergClient · sseResource() · POST /api/links · Retry-After · Idempotent-Replayed: true · ReportRenderer · SSE_EVENT_SOURCE · POST /api/images · @Idempotent · IdempotencyStore

ReportRenderer · SSE_EVENT_SOURCE · POST /api/images · @Idempotent · IdempotencyStore · GET /api/reports/{type}/{id} · SseConnectionError · storage_full · Idempotency-Key · GotenbergClient · sseResource() · POST /api/links · Retry-After · Idempotent-Replayed: true · ReportRenderer · SSE_EVENT_SOURCE

POST /api/links · Retry-After · Idempotent-Replayed: true · ReportRenderer · SSE_EVENT_SOURCE · POST /api/images · @Idempotent · IdempotencyStore · GET /api/reports/{type}/{id} · SseConnectionError · storage_full · Idempotency-Key · GotenbergClient · sseResource() · POST /api/links · Retry-After

Idempotency-Key · GotenbergClient · sseResource() · POST /api/links · Retry-After · Idempotent-Replayed: true · ReportRenderer · SSE_EVENT_SOURCE · POST /api/images · @Idempotent · IdempotencyStore · GET /api/reports/{type}/{id} · SseConnectionError · storage_full · Idempotency-Key · GotenbergClient

GET /api/reports/{type}/{id} · SseConnectionError · storage_full · Idempotency-Key · GotenbergClient · sseResource() · POST /api/links · Retry-After · Idempotent-Replayed: true · ReportRenderer · SSE_EVENT_SOURCE · POST /api/images · @Idempotent · IdempotencyStore · GET /api/reports/{type}/{id} · SseConnectionError

POST /api/images · @Idempotent · IdempotencyStore · GET /api/reports/{type}/{id} · SseConnectionError · storage_full · Idempotency-Key · GotenbergClient · sseResource() · POST /api/links · Retry-After · Idempotent-Replayed: true · ReportRenderer · SSE_EVENT_SOURCE · POST /api/images · @Idempotent

Four open source projects, documented from their code.

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