From Eclipses to P95 Latency: What the Joseon Dynasty Can Teach Us About Incident Response

The Joseon Dynasty ruled Korea for more than five centuries, from 1392 to 1897.

That is longer than the United States has existed. Longer than the printing press has been in widespread use. Five hundred years of one government, one bureaucracy, one record-keeping system.

And they documented everything.

The 朝鮮王朝實錄 (Veritable Records of the Joseon Dynasty) is one of the most extensive continuous historical records ever produced. Royal decrees, diplomatic correspondence, criminal cases, military campaigns, natural disasters, celestial observations, agricultural conditions, and administrative decisions were meticulously recorded.

Every eclipse.

Every comet.

Every drought.

Every flood.

Every tiger that wandered into a village.

At first glance, it reads like a civilization obsessed with omens. Look closer and it begins to resemble something else: an accountability system operating at national scale.

The Mandate of Heaven as an Accountability Mechanism

Joseon inherited the concept of the Mandate of Heaven from Chinese political philosophy.

The basic premise was simple: Heaven's approval of a ruler could be inferred from events in the natural world. Stable harvests, favorable weather, and orderly skies suggested good governance. Floods, eclipses, unusual celestial events, and other disruptions demanded attention.

Whether or not one accepted the underlying cosmology, the system functioned as a powerful accountability mechanism.

When an eclipse occurred, someone had to observe it.

Someone had to record it.

Officials had to discuss its significance.

The court had to determine whether action was required.

The response had to be documented.

And the entire process became part of a permanent historical record.

A king could not plausibly claim ignorance of a reported eclipse.

An official could not quietly invent a justification for a policy years later.

The record existed. The deliberation existed. The decision existed.

Accountability was structural.

omen.ops: A Dynasty Rendered as Telemetry

Recently, Ajin built omen.ops, a project that renders the Veritable Records as a modern observability dashboard.

It is one of the most serious pieces of digital scholarship I have encountered. Every entry is sourced, annotated, and presented with the gravity the original record-keepers intended. Rather than merely digitizing the records, the project reinterprets them through the lens of modern operations, observability, and incident management.

Suddenly, centuries-old historical events look remarkably familiar.

Eclipses appear as system alerts.

Comets register as anomaly spikes.

Droughts become degradation events.

The Mandate of Heaven itself is represented as a system health score.

The effect is both humorous and strangely illuminating.

A guest star observed over thirteen consecutive night-watches in 1592 appears as a P1 incident. The court astronomers of the Gwansanggam—the royal bureau responsible for celestial observation—tracked its position relative to known stars, recorded its persistence, and noted the absence of any established remediation procedure.

In modern operations language, the alert was acknowledged, classified, documented, and ultimately deemed unactionable.

Every engineer who has ever been paged at 3 AM has encountered the same category of problem.

The dashboard also presents a derived metric called the Mandate Volatility Index.

It compresses centuries of recorded anomalies into a single score relative to a reign's baseline conditions.

The historical court and the modern SRE team face the same challenge: overwhelming amounts of signal with limited human attention.

Different centuries. Different tools. Same problem.

They needed summaries.

We use dashboards.

They had volatility indexes.

We have P95 latency graphs.

The Tiger Incident

The most memorable entry may not involve the heavens at all.

In 1571, a white-browed tiger reportedly killed hundreds of people and livestock near the capital.

The response escalated rapidly.

The court mobilized a specialized Tiger-Catching Commander and launched a coordinated hunt.

Then a secondary problem emerged.

The soldiers sent to eliminate the tiger began looting civilians.

The court was suddenly managing two incidents instead of one.

The tiger threat was eventually mitigated. Multiple animals were killed. The military operation was scaled back. Reports of civilian misconduct were documented.

Incident opened.

Response initiated.

Unexpected side effects detected.

Mitigation adjusted.

Incident closed.

The terminology changes. The workflow does not.

The Governance Problem Hasn't Changed

The tools have changed completely. The governance problem has not.

What fascinates me about the Joseon system is not the astronomy.

It is the process.

Observe.

Record.

Deliberate.

Authorize.

Act.

Document.

That sequence appears repeatedly throughout the Veritable Records.

It is also the sequence behind every mature operational system.

Modern monitoring platforms are excellent at collecting signals. They can detect latency spikes, memory pressure, queue backlogs, failed deployments, and infrastructure degradation in seconds.

What many systems still struggle with is everything that happens after detection.

Who saw the alert?

Who approved the response?

What evidence was considered?

Why was a particular action taken?

Can someone reconstruct the decision six months later?

Detection is only the beginning.

Accountability begins when decisions become traceable.

Building for Active Control

This idea sits at the center of what I am building with FastAPI AlertEngine.

FastAPI AlertEngine is incident intelligence for FastAPI services. A free SDK adds health monitoring to your application with a single line of code. When degradation is detected, a managed orchestrator investigates the likely cause and sends you a WhatsApp or Telegram notification containing a single-use approval link. Nothing executes without your authorization.

The goal is not simply to collect more alerts.

Most organizations already have more alerts than they can reasonably process.

The goal is to preserve the decision chain.

Observe the signal.

Capture the evidence.

Present the context.

Recommend an action.

Require authorization.

Execute the response.

Record everything.

The Joseon court performed this process with brush, ink, astronomers, royal historians.

We perform it with telemetry pipelines, machine reasoning, APIs.

The difference is speed.

The court might take days to process an eclipse.

We can detect a P95 latency spike, identify likely causes, generate remediation options, and request approval in seconds.

But the underlying governance problem remains unchanged.

How do you ensure that the people responsible for a system are confronted with evidence, required to make a decision, and unable to rewrite history afterward?

Five hundred years ago, the Joseon Dynasty answered that question with brush and ink.

We are still figuring it out with Redis and JWT tokens.

Explore the historical dashboard: https://ajin.im/is/building/omen.ops/

If you run FastAPI in production and want incident response that asks before it acts, the free SDK is available through FastAPI AlertEngine.