feat: custom gfm plugin for gt-remark

[fernando-aviles]

Greptile Overview

Greptile Overview

Greptile Summary

This PR adds a custom GitHub Flavored Markdown (GFM) plugin to the gt-remark package by implementing remarkGfmCustom. The plugin registers GFM extensions for strikethrough, tables, task lists, and footnotes.

Key Changes:

• Added remarkGfmCustom plugin that configures micromark and mdast extensions for GFM features
• Added 8 new dependencies: 4 micromark extensions and 4 mdast utilities
• Exported remarkGfmCustom alongside existing escapeHtmlInTextNodes plugin

Issues Found:

• Missing tests for the new remarkGfmCustom plugin - no verification it works correctly
• Plugin implementation uses data-only pattern (doesn't return transformer), which is valid but should be tested to ensure GFM features work as expected

Confidence Score: 3/5

• This PR is functionally safe but lacks test coverage for new functionality
• The implementation follows unified plugin patterns correctly and adds standard GFM dependencies. However, the new remarkGfmCustom plugin has zero test coverage, making it impossible to verify it works correctly with strikethrough, tables, task lists, and footnotes. The existing escapeHtmlInTextNodes has comprehensive tests, but the new plugin needs similar coverage.
• Pay attention to packages/remark/src/index.ts - the new plugin needs testing before production use

Important Files Changed

File Analysis

Filename	Score	Overview
packages/remark/src/index.ts	3/5	Added custom GFM plugin implementation with all GFM extensions, but missing tests and no return statement clarification
packages/remark/package.json	5/5	Added 8 new GFM-related dependencies for micromark extensions and mdast utilities

Sequence Diagram

sequenceDiagram
    participant User
    participant Unified as Unified Processor
    participant Plugin as remarkGfmCustom
    participant Data as Processor Data
    participant Extensions as GFM Extensions
    
    User->>Unified: .use(remarkGfmCustom)
    Unified->>Plugin: Call plugin function
    Plugin->>Data: Access this.data()
    Plugin->>Data: Initialize extension arrays
    Plugin->>Extensions: Load micromark extensions
    Extensions-->>Plugin: gfmStrikethrough, gfmTable, etc.
    Plugin->>Data: Push to micromarkExtensions
    Plugin->>Extensions: Load from/to markdown utils
    Extensions-->>Plugin: gfmStrikethroughFromMarkdown, etc.
    Plugin->>Data: Push to fromMarkdownExtensions
    Plugin->>Data: Push to toMarkdownExtensions
    Plugin-->>Unified: Extensions registered
    Unified->>User: Processor ready with GFM support

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Important Files Changed

File Analysis

Filename	Score	Overview
packages/remark/src/index.ts	3/5	Added custom GFM plugin implementation with all GFM extensions, but missing tests and no return statement clarification
packages/remark/package.json	5/5	Added 8 new GFM-related dependencies for micromark extensions and mdast utilities

Sequence Diagram

sequenceDiagram
    participant User
    participant Unified as Unified Processor
    participant Plugin as remarkGfmCustom
    participant Data as Processor Data
    participant Extensions as GFM Extensions
    
    User->>Unified: .use(remarkGfmCustom)
    Unified->>Plugin: Call plugin function
    Plugin->>Data: Access this.data()
    Plugin->>Data: Initialize extension arrays
    Plugin->>Extensions: Load micromark extensions
    Extensions-->>Plugin: gfmStrikethrough, gfmTable, etc.
    Plugin->>Data: Push to micromarkExtensions
    Plugin->>Extensions: Load from/to markdown utils
    Extensions-->>Plugin: gfmStrikethroughFromMarkdown, etc.
    Plugin->>Data: Push to fromMarkdownExtensions
    Plugin->>Data: Push to toMarkdownExtensions
    Plugin-->>Unified: Extensions registered
    Unified->>User: Processor ready with GFM support

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