fix(tsconfig): lowercase module

[Tobbe]

The tsconfig json schema currently doesn't support "module": "Node20", see SchemaStore/schemastore#5326

But even if/when that PR gets merged, the intellisense (hover hints/auto complete) will use "node20". And while not 100% consistent, the tsconfig docs also seems to prefer all-lowercase values, listing "node20" as an allowed value

https://www.typescriptlang.org/tsconfig/#module

So this PR switches the "module" value, and a couple of others, to lowercase

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[nx-cloud]

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☁️ Nx Cloud last updated this comment at 2026-01-30 15:14:41 UTC

[greptile-apps]

Greptile Overview

Greptile Summary

This PR standardizes TypeScript configuration values to use lowercase, aligning with TypeScript's official documentation and IDE intellisense conventions.

Changes Made

• Module values: Node20 → node20, ESNext → esnext
• ModuleResolution values: Node16 → node16
• Target values: ES2023 → es2023
• Note: "module": "Node16" intentionally remains uppercase (only updated to node20 where applicable)
• JSON formatting: Added trailing commas throughout for consistency

Files Updated

• 62 tsconfig.json/jsconfig.json files across the monorepo
• CLI package handler logic (packageHandler.js)
• Template files for new package generation
• Test files and snapshots

Impact

• Resolves schema validation warnings in IDEs
• Aligns with TypeScript documentation conventions
• The packageHandler.js already performs case-insensitive comparison (line 103-104), so existing functionality is preserved
• All tests updated to expect lowercase values

Confidence Score: 5/5

• This PR is safe to merge with no risk
• The changes are purely stylistic, converting TypeScript configuration values to lowercase to match official conventions. The packageHandler already performs case-insensitive comparisons, all tests pass with updated expectations, and no functional behavior is altered.
• No files require special attention

Important Files Changed

Filename	Overview
packages/cli/src/commands/generate/package/packageHandler.js	Updated expectedModule values to lowercase (node20, esnext) to match TypeScript conventions
packages/cli/src/commands/generate/package/tests/package.test.ts	Updated test expectations to use lowercase module values, added test for lowercase node16 input
packages/cli/src/commands/generate/package/templates/tsconfig.json.template	Changed template to generate lowercase target and module values for new packages
packages/cli/tsconfig.json	Changed module and moduleResolution to lowercase, added trailing commas
test-project/api/tsconfig.json	Changed target, module, and moduleResolution to lowercase, added trailing commas

Sequence Diagram

sequenceDiagram
    participant Dev as Developer
    participant CLI as Cedar CLI
    participant Handler as packageHandler.js
    participant FS as File System
    participant TS as TypeScript Parser

    Dev->>CLI: Generate new package
    CLI->>Handler: updateTsconfig()
    
    loop For each target (api, web, scripts)
        Handler->>FS: Read tsconfig.json
        FS-->>Handler: Return config text
        Handler->>TS: parseConfigFileTextToJson()
        TS-->>Handler: Parsed config object
        
        alt Has module config
            Handler->>Handler: currentModule.toLowerCase()
            Handler->>Handler: Check if acceptable value
            
            alt Not acceptable
                Handler->>Handler: modify() with lowercase value<br/>(node20, esnext)
                Handler->>FS: Write updated tsconfig
                FS-->>Handler: Success
            else Already acceptable
                Handler->>Handler: Skip update
            end
        else No module config
            Handler->>Handler: Skip tsconfig
        end
    end
    
    Handler-->>CLI: Update complete
    CLI-->>Dev: Package generated with<br/>lowercase module values

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[greptile-apps]

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[github-actions]

The changes in this PR are now available in 3.0.0-canary.13306+cdce5184d