03 / Explicit reliability simulation

Strengthen the backend and reliability

Make APIs, data, background work, and recovery paths easier to trust.

Simulation only. It does not touch a database, queue, cloud account, or production service.

Plain-language backend overview with icons: web app, API, database, job queue, and a recovery shield, plus a note that the runbook on this page is a browser-only simulation and AWS stays plan-only. — Backend overview / plain-language

Concept illustration of servers, a database cylinder, and a job queue under a protective dome with a heartbeat line. — Concept illustration: the system under observation and protection.

Problem

A backend is more than a happy-path endpoint. Reviewers need to see authentication boundaries, durable state, worker behavior, readiness signals, and what a recovery or rollback rehearsal can actually prove.

Approach

PulseBoard is the real evidence anchor: a production-shaped portfolio project with a Hono API, PostgreSQL and Prisma, Redis and BullMQ, API-key boundaries, OpenAPI, liveness/readiness, worker recovery, and local backup/restore and rollback rehearsals.

Proof

The demo below is an explicit simulation of an operational runbook. It walks through health checks, queue retry, a restore gate, and rollback verification so the distinction between a documented procedure and a live production claim stays visible.

Limits

The simulation is not a live incident system and does not establish production traffic, SLA, RPO/RTO, or a successful remote deployment. AWS remains plan-only in the current evidence boundary.

Product walkthrough

What it looks like in use

Real states of the interactive demo below: what a reviewer sees when the flow succeeds and when it fails.

Screenshot of the recovery runbook simulation with all four gates in the passed state and the completion message visible. — Simulation state / all gates passedThe simulation's completed state, as rendered by the interactive demo on this page.

Interactive / Explicit reliability simulation

Recovery runbook: step through a controlled simulation

Simulation only. It does not touch a database, queue, cloud account, or production service.

01 / HEALTH GATE

Check liveness

Confirm the service boundary responds before changing state.

02 / QUEUE RETRY

Retry work

Make the retry decision visible instead of silently dropping a job.

03 / RESTORE GATE

Validate restore

Check the restored state before treating recovery as complete.

04 / ROLLBACK CHECK

Verify rollback

Confirm the release boundary before reopening the path.

Ready. No external system will be touched.

For detailed review

Engineering diagrams

Denser diagrams of the same boundaries, for reviewers who want the full structure.

Architecture diagram separating PulseBoard repository evidence (Hono API, PostgreSQL with Prisma, Redis with BullMQ, worker, health gates, local rehearsals) from the browser-only recovery runbook simulation on this page; AWS stays plan-only. — Evidence vs simulation zonesZone A is repository evidence; Zone B is this page's browser-only simulation.

Timeline of the recovery runbook: health gate, queue retry, restore gate, and rollback check, each with its pass condition, labeled as an in-page simulation. — Recovery runbook timelineFour gates, each with an explicit pass condition before the next step runs.

Continue the review

Bring the existing codebase, constraint, or failure path.

This page demonstrates a bounded working method. The next step would be to inspect the actual repository and agree on the smallest verifiable slice.

Open the evidence page