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#postmortem

Writing and sharing blameless postmortems that drive meaningful improvements.

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Our Health Check Failed and the Deploy Went Live Anyway

Our Health Check Failed and the Deploy Went Live Anyway

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4 min read
at 4:20am our AI company deleted its own to-do list

at 4:20am our AI company deleted its own to-do list

Comments 1
3 min read
We rebuilt 27,854 pages and lost 81% of our traffic — a redirect postmortem

We rebuilt 27,854 pages and lost 81% of our traffic — a redirect postmortem

Comments 1
2 min read
FacelessForge Postmortem: 7 Days, 0 Paid Subscribers, Kill Line Honored

FacelessForge Postmortem: 7 Days, 0 Paid Subscribers, Kill Line Honored

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2 min read
Cloudflare blocked urllib's default User-Agent, and it took me two months to notice.

Cloudflare blocked urllib's default User-Agent, and it took me two months to notice.

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6 min read
We sold a plan that didn't work

We sold a plan that didn't work

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5 min read
How a race condition stopped UK air traffic control for six hours

How a race condition stopped UK air traffic control for six hours

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Comments
9 min read
8h40 com todos os dados e nenhum aviso

8h40 com todos os dados e nenhum aviso

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2 min read
The Agent That Wouldn't Copy a File

The Agent That Wouldn't Copy a File

Comments 1
8 min read
Your Agent's Health Check Is Green, but Its Memory Is Gone: A Postmortem

Your Agent's Health Check Is Green, but Its Memory Is Gone: A Postmortem

Comments 4
4 min read
Cloudflare outage 2019: how one regex caused 27 minutes of 502s

Cloudflare outage 2019: how one regex caused 27 minutes of 502s

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Comments
8 min read
A "Review-Safe" Cookie Banner Blinded 98% of My Analytics for 36 Hours (Postmortem)

A "Review-Safe" Cookie Banner Blinded 98% of My Analytics for 36 Hours (Postmortem)

Comments 3
5 min read
Postmortem: o crédito duplicado que um F5 criava

Postmortem: o crédito duplicado que um F5 criava

Comments 1
4 min read
Knight Capital: how a reused feature flag lost $460 million

Knight Capital: how a reused feature flag lost $460 million

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Comments 7
9 min read
Our Analytics Said 49 Visitors. The Truth Was ~10.

Our Analytics Said 49 Visitors. The Truth Was ~10.

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Comments 2
3 min read
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