Corsa differences in `export=` module augmentation

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Description

## Corsa changes how module augmentation interacts with export-equals and exported name visibility
augmentExportEquals2.errors.txt.diff
exportAssignmentMembersVisibleInAugmentation.errors.txt.diff

Contributor guide

Research direction

Review the attached two error diff files to identify the mismatch in module augmentation with export=. Reproduce the failure by running the relevant tests in the TypeScript test suite, then trace the compiler's module resolution code to find where the behavior diverges.

Tech stack

typescript

Domain

compilers

Issue type

Bug

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-2 days

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

Active

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

Unclear

Prerequisites

GitTypeScriptNode.js

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

35