Greptile Overview

Greptile Summary

This PR removes all Yarn v1 compatibility code from the Cedar CLI, simplifying yarn command invocations across multiple handlers.

Key Changes:

• Removed getCmdMajorVersion() function from packages/cli/src/commands/upgrade.js:508-525 that detected yarn version
• Eliminated yarn v1-specific flags: -W (workspace flag), -s (silent flag), --force, and --non-interactive
• Simplified yarn install, yarn dedupe, yarn add, and yarn tsc commands to use only yarn v2+ syntax
• Removed unused mock in type-check.test.js:46-48 for getCmdMajorVersion

Issue Found:

• Test expectations in type-check.test.js:80,85,105 still expect double-space formatting ('yarn tsc') from the old conditional logic, but the actual command now produces single-space formatting ('yarn tsc'). Tests will fail without updating the expected strings.

Confidence Score: 3/5

• This PR has critical test failures that must be fixed before merging
• The refactoring itself is clean and correct—all yarn v1 code is properly removed. However, the test file has outdated expectations that will cause CI failures. The score reflects that the code changes are sound but tests need updates.
• packages/cli/src/commands/tests/type-check.test.js requires test expectation updates to match the new command format

Important Files Changed

File Analysis

Sequence Diagram

sequenceDiagram
    participant User
    participant CLI
    participant YarnV2Plus as Yarn v2+

    Note over CLI: Before: Checked yarn version<br/>and used v1-specific flags

    User->>CLI: upgrade command
    CLI->>YarnV2Plus: yarn install (no --force, --non-interactive)
    CLI->>YarnV2Plus: yarn dedupe (no fallback logic)

    User->>CLI: type-check command
    CLI->>YarnV2Plus: yarn tsc (no -s flag)

    User->>CLI: setup ui tailwindcss
    CLI->>YarnV2Plus: yarn add -D (no -W flag)

    User->>CLI: addPackagesTask
    CLI->>YarnV2Plus: yarn add (no -W flag)

    Note over CLI,YarnV2Plus: After: All commands assume<br/>Yarn v2+ (no version checks)

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