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dev: bring ty to parity with mypy and suppress what it reports today - #4207

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oresttokovenko wants to merge 13 commits into

apache:mainfrom

oresttokovenko:migrate-to-ty-part-1

Draft

dev: bring ty to parity with mypy and suppress what it reports today#4207
oresttokovenko wants to merge 13 commits into
apache:mainfrom
oresttokovenko:migrate-to-ty-part-1

Commits on Oct 30, 2026
- dev: add ty as a manual pre-commit hook
  oresttokovenko
  committed
  f737a33
- dev: pin mypy locally and exclude vendor from it
  oresttokovenko
  committed
  7a33c63
- ty: exclude tests/ from analysis for now
  oresttokovenko
  committed
  3829df4
- ty: report missing type arguments like mypy does
  oresttokovenko
  committed
  2acd0dd
- utils: annotate Singleton instead of suppressing mypy
  oresttokovenko
  committed
  3e5b85a
- dev: give mypy suppressions their error codes
  oresttokovenko
  committed
  8dbcd7a
- utils: type the Singleton instance cache key
  oresttokovenko
  committed
  0bc99eb
Commits on Nov 2, 2026
- utils: import Self from typing
  oresttokovenko
  committed
  cf2bed9
- ty: mirror the mypy configuration and scope both checkers to the package
  oresttokovenko
  committed
  dface02
- dev: run ty in its own pre-commit environment
  oresttokovenko
  committed
  62b50ec
- ty: suppress the diagnostics the package reports today
  oresttokovenko
  committed
  12a8f3b
- ci: report ty in the existing lint job
  oresttokovenko
  committed
  040369e
- dev: trim a redundant comment on the ty hook
  oresttokovenko
  committed
  ce941ce