mypy
Fewer than 5 people recommend it so far, so there's no written verdict. Here is what commenters said.
3recommend
1warn against
Nov 30, 2025first mention
Oct 27, 2026latest mention
Why people recommend it
“The one thing that did change anything was giving the agent a type checker. It ran mypy on nearly every change, and no type errors got through.”
“it is helpful to make them run ruff and mypy to keep them honest”
Show 1 more
“typing+mypy/mypyc goes a very long way”
Caveats and dissent
“the MyPy LSP ecosystem is somewhere between crumbling and deprecated at this point”
Often compared with
Who recommends it in their own words
Threads where it came up
- Do Stronger Type Systems Make Coding Agents Better? 1 mention
- SlopCodeBench 10/2026 – Opus 5.5, Astra wins overall, xhigh considered harmful 1 mention
- Scarf has moved away from Haskell 1 mention
- Are you expected to run five Python type-checkers now? 1 mention
- A Couple Million Lines of Haskell: Production Engineering at Mercury 1 mention
- Announcing the Beta release of ty 1 mention
Also written as Mypy, MyPy. Data: mypy.json. Quotes are verbatim; the verdict and theme labels are written by a model from these comments, and every clause links to its sources.
All comments 7
“The one thing that did change anything was giving the agent a type checker. It ran mypy on nearly every change, and no type errors got through.”
“it is helpful to make them run ruff and mypy to keep them honest”
“typing+mypy/mypyc goes a very long way”
“lets a type checker like mypy catch type mismatches in your code”
“Currently I use Python with Mypy.”
“We run both Pyright and Mypy... they catch different errors so we've kept both, but it feels redundant.”
“the MyPy LSP ecosystem is somewhere between crumbling and deprecated at this point”