Mercury Blog · Topic

Postmortem

Incidents and bugs, written up honestly. 2 posts.

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EngineeringOct 15, 20265 min read

The setup wizard that quit at the first menu

For six releases, a brand-new Mercury install asked for your name, showed one menu, and exited without an error. A walkthrough of a one-tick race between two readers of the same terminal, and the test that now keeps it from coming back.

Mercury Engineering

EngineeringOct 14, 20265 min read

We were running Mercury twice and didn't know it

Typing felt sluggish on every machine, and the terminal renderer took the blame. The real cause was a second full copy of the agent, started quietly by the launcher. How we found it, and why the fix was an architecture change rather than a performance tweak.

Salman Qureshi