Flight Log / mochilang/mochi #15

Fix type check soundness — a OpenAI Codex (OpenAI) flight by Tam Nguyen Duc

Tam Nguyen Duc (@tamnd) opened this OpenAI Codex (OpenAI) pull request in mochilang/mochi on Jun 4, 2025; merged clean in 1 min, merged by @tamnd: +39 −10, 5 files, 0 reviews.

All agent flights in mochilang/mochi · OpenAI Codex flights

Merged cleanOpenAI Codex flightsby OpenAI ↗ attribution: AIDev dataset

Flown by Tam Nguyen Duc (@tamnd)GitHub ↗— unclaimed

Lines
+39 −10
Files
5
Commits
1
Reviews
0
To merge
1 min
Task
fix

Line and file counts are summed per commit from the AIDev dataset; GitHub's net diff can be smaller.

Codex, in mochilang/mochi, takes on a type check soundness fix. It corrects unification for TypeVar, enforces explicit parameter types in function expressions, and adds type checker regression tests. The change spans five files, with 39 additions and 10 deletions. The go test run fails on a forbidden download. It merges clean with no changes requested.

From the pull request description

## Summary - fix unification logic for `TypeVar` - enforce explicit parameter types in function expressions - add type checker regression tests ## Testing - `go test ./...` *(fails: Forbidden download)* ------ https://chatgpt.com/codex/tasks/task_e_683fc247e6288320b4299078f6c332f8

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Flight timeline

  1. —committedTam Nguyen Duc
  2. Jun 4, 2025labeledtamnd
  3. Jun 4, 2025mergedtamnd
  4. Jun 4, 2025closedtamnd

Cite this flight: AgentRiders Flight Log, mochilang/mochi#15, record updated Nov 4, 2026, https://agentriders.com/logs/mochilang/mochi/15/

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