Engineering
AI agent observability: The developer's guide to agent monitoring
Most discussions about agent observability read like outdated compliance checklists with "AI" substituted for older technologies. They emphasize comprehensive…
Engineering
Seer fixes Seer: How Seer pointed us toward a bug and helped fix an outage
How Sentry's AI debugging tool Seer helped identify and fix a cascading region blocklist bug that caused an outage in Seer's own EU deployment.
Engineering
Do you need an MCP to build your native app?
Do you need an MCP to build your native app? Surprisingly, modern agents succeed either way. The real difference is how much time, cost, and context you waste along the way.
Engineering
Building Type-Safe Metrics API in Swift: Part II
Replace Any with type-safe protocols, handle array conformance limitations, and future-proof your Swift enums.
Engineering
Building Type-Safe Metrics API in Swift: Part I
Explore protocol extensions, enums with associated values, and ExpressibleByStringLiteral to build type-safe Swift APIs.
Engineering
"Swizzling" iOS functions in Swift
How to hook pure Swift functions at runtime using an in-process debugger.
Engineering
Reverse Engineering iOS to Fix SDK Crashes
We reverse-engineered a private iOS framework to uncover why iPadOS 26 broke type casting in our SDK.
Engineering
Keeping Up With the Python Ecosystem
The Sentry Python SDK has built-in support for more than 60 popular packages. This is how we make sure we actually support what we claim to be supporting.
Engineering
Tablecloth Trick: Migrating Issue Alerts to a New System
How we silently switched error issue alerts to a new system.
Engineering
From /users/123 to /users/:id: A Guide to Route Parametrization
How Sentry's JS SDKs figure out your dynamic route names to make querying your issues easier.
Engineering
Shipping Features Without Writing Code
How Cursor's background agent added C# support to Sentry with minimal prompting.
Engineering
Building a Product Tour in React
How we went about building a performant, in-app product tour API using only React
Engineering
Formatting SQL in the Browser Using PEG
Writing a rudimentary SQL parser and formatter in JavaScript that handles Sentry's need to format invalid SQL and output into JSX.
Engineering
How Sentry queries unstructured data in ClickHouse 62x faster
We repurposed a hashtable to make ClickHouse significantly faster for analytical queries
