December 2025 monthly summary focusing on delivering precise syntax highlighting improvements and maintaining high code quality across the Neovim Treesitter ecosystem. The work centered on enhancing dollar symbol highlighting within multi-symbol contexts, strengthening the reliability of fennel-related highlighting, and aligning with existing fixes to broaden coverage. Key outcomes include improved user-facing syntax fidelity for complex dollar-prefixed expressions (e.g., $3.some.properties) and multi-token patterns such as $[1-9], which reduces cognitive load for developers editing fennel code. Overall, this month delivered tangible improvements to developer productivity and editor trust by ensuring consistent, accurate highlighting across challenging contexts, contributing to a more robust parsing layer in nvim-treesitter.