feat(deps): update module github.com/alecthomas/chroma/v2 to v2.20.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
github.com/alecthomas/chroma/v2	v2.18.0 -> v2.20.0

---

Release Notes

alecthomas/chroma (github.com/alecthomas/chroma/v2)

v2.20.0

Compare Source

Changelog

• 303b65d feat: improve tracing
• 1f48e65 fix(markdown): don't delegate to HTML lexer
• ea89498 chore(deps): update ubuntu docker tag to v24 (#​1104)
• 14227ee chore(deps): update dependency biome to v2 (#​1109)
• 4a1dcb2 chore(deps): update dependency uv to v0.8.4 (#​1115)
• dca61f8 chore(deps): pin dependencies (#​1098)
• a21d7b8 chore: go mod tidy + update README list of languages
• 1ca24c9 correct lexing AS keyword for docker (#​1114)
• 1dfa2b6 update css.xml with current properties (#​1113)
• 5b2a4c5 feat(formatter): add writeCSSComments option (#​1112)
• 02ff9d4 Sync Catppuccin styles (#​1111)
• a53c924 Create Lexer for Nu (#​1110)
• 0e031c7 chore(deps): update all non-major dependencies (#​1108)
• 673bbb4 chore(deps): update all non-major dependencies (#​1103)
• 5d56970 Add uv.lock to TOML lexer (#​1105)
• eb9a552 fix: Dockerfile $PORT should be just a port
• acaae4e feat: add Dockerfile for chromad
• f3be4c6 Create lexer for Gemtext (#​1102)
• a0c6dff chore(deps): update all non-major dependencies (#​1099)
• abe0195 Create lexer for lox (#​1100)
• dfb2819 Fixed ObjectPascal comment issue (#​1097)
• 908d2a3 sync catppuccin-mocha.xml with upstream (#​1094)
• acd21c6 add aspect-ratio property to css.xml (#​1095)
• 55d924d chore(deps): update all non-major dependencies (#​1092)
• d0ad679 feat: improve Go lexer
• d2f8caa refactor: simplify WASM init
• fb36d31 chore: apply biome linter fixes
• b69cd3d chore: add JS formatting with biome

v2.19.0

Compare Source

Changelog

• adeac8f feat: WASM playground
• 484750a chore: add uv
• a5ceb28 fix: add lexer compile time validation for group by
• cd5c4a8 docs(readme): update go reference badge to point to v2 and new domain (#​1087)
• 970eacc Add MoonScript lexer (#​1091)
• 6ffb465 chore(deps): update all non-major dependencies (#​1082)
• 2c20473 Various lexer & style fixes for RPGLE (#​1086)
• c803d79 fix(zig): detect zig object notation files as zig (#​1085)
• bc60826 Add Core lexer (#​1083)
• ffedbf4 fix(kotlin): detect kotlin script files as kotlin (#​1081)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[github-actions]

Renovate PR Review Results

⚖️ Safety Assessment: ✅ Safe

🔍 Release Content Analysis

v2.20.0 Changes:

• New Features: Improved tracing, new language lexers (Nu, Gemtext, Lox), CSS formatter option writeCSSComments
• Bug Fixes: Markdown lexer delegation fix, ObjectPascal comment handling, Docker AS keyword parsing
• Enhancements: Improved Go lexer, updated CSS properties, Catppuccin theme sync
• Breaking Changes: None identified
• Security Fixes: None mentioned

v2.19.0 Changes:

• New Features: WASM playground, new language lexers (MoonScript, Core)
• Improvements: Enhanced file type detection for Zig and Kotlin, compile-time lexer validation
• Breaking Changes: None identified
• Security Fixes: None mentioned

🎯 Impact Scope Investigation

Core Usage Analysis:

• Primary Integration: internal/gat/gat.go:16,36-38 - Uses core Chroma types (chroma.Lexer, chroma.Formatter, chroma.Style)
• Lexer Management: internal/lexers/lexers.go:6-7,36,44,51,55,61,64-65 - Uses Chroma's lexer registry and analysis functions
• Style Management: internal/styles/styles.go:7-8,27,31,36-38,42 - Uses Chroma's style registry and XML parsing
• Formatter Management: internal/formatters/formatters.go:4-5,8-9,13-14 - Uses Chroma's formatter registry

API Surface Analysis:
All Chroma APIs used in the codebase are stable public APIs:

• lexers.Get(), lexers.Match(), lexers.Analyse(), lexers.Fallback
• chroma.Coalesce(), chroma.NewXMLStyle()
• styles.Register(), styles.Registry, styles.Names()
• formatters.Registry, formatters.Names()

Dependency Impact:

• Updated github.com/alecthomas/repr from v0.4.0 to v0.5.1 (internal dependency)
• No changes to gat's direct API usage patterns

💡 Recommended Actions

Immediate Actions:

• ✅ Merge Approved: The update can be safely merged
• 🧪 Consider Testing: Run existing tests to verify functionality (optional but recommended)

Benefits of Update:

• Access to new language lexers (Nu, Gemtext, Lox, MoonScript, Core)
• Improved syntax highlighting for Go, Markdown, Docker, ObjectPascal
• Enhanced CSS property support
• Better tracing capabilities

No Migration Required:

• All existing APIs remain backward compatible
• No configuration changes needed
• No code modifications required

🔗 Reference Links

• Chroma v2.20.0 Release
• Chroma v2.19.0 Release
• Chroma Repository