nvim/AGENTS.md

AGENTS: Neovim Config Migration

Scope: applies to the entire ~/.config/nvim directory tree.

This repository is being migrated to a modern, minimal Neovim setup driven by Lua and lazy.nvim. Follow these rules when making changes.

Goals

• Modern Lua-first config; avoid Vimscript unless explicitly requested.
• Keep it minimal, fast, and maintainable.
• Base plugin management on lazy.nvim with modular plugin specs.
• Support tab-per-context workflow with Neo-tree per tab, Telescope navigation, LSP, Treesitter, Copilot, and sane UX defaults.

Do Not Reintroduce

• Custom Vimscript tabline/statusline, foldtext, UI hacks.
• Legacy autocommands toggling cursorline/column per window.
• CoC or CoC-specific config.
• netrw settings (Neo-tree will be used).
• Providers for ruby/perl/node (disable unless required by a plugin).
• Auto-reload vimrc-on-write templates.
• cursorcolumn and old folding logic not related to UFO.

Repository Structure (target)

~/.config/nvim/
├── init.lua                   -- entrypoint; bootstraps lazy.nvim and loads Lua modules
└── lua/
    ├── settings.lua          -- non-plugin options
    ├── keymaps.lua           -- non-plugin keymaps
    ├── autocmds.lua          -- non-plugin autocommands
    ├── abbreviations.lua     -- insert-mode abbreviations
    ├── netrw-config.lua      -- netrw configuration
    ├── utils.lua             -- helpers (only if needed)
    └── plugins/              -- one file per plugin or domain
        ├── telescope.lua
        ├── treesitter.lua
        ├── cmp.lua
        ├── lsp.lua
        ├── copilot.lua
        ├── oil.lua
        ├── ufo.lua
        ├── gitsigns.lua
        └── none-ls.lua

Coding Conventions

• Use Lua APIs: vim.opt, vim.api.nvim_create_autocmd, vim.keymap.set.
• No inline Vimscript or vim.cmd blocks unless strictly necessary.
• Keep plugin configuration self-contained in its plugin spec file.
• Prefer small, readable modules and minimal configuration over heavy customization.
• Keymaps: use vim.keymap.set with { silent = true, noremap = true } defaults unless otherwise required.
• Autocommands: group via vim.api.nvim_create_augroup and create specific, narrowly scoped autocmds.
• Avoid global state; return tables from modules and plugin specs.

Plugin Management (lazy.nvim)

• Each plugin lives in lua/plugins/<name>.lua and returns a spec table.
• Use opts = {} for default options and config = function(_, opts) ... end for setup.
• Do not install any plugin not listed without explicit user confirmation (proposal and rationale are welcome).
• Approved additions: folke/neoconf.nvim for project-local configuration.

Required Plugin Categories

• Core: nvim-lspconfig, nvim-cmp, cmp-nvim-lsp, cmp-buffer, cmp-path, LuaSnip.
• Navigation: neo-tree.nvim, telescope.nvim (+ optional telescope-fzf-native.nvim).
• Treesitter: nvim-treesitter, nvim-treesitter-textobjects, nvim-ts-autotag.
• UX/Editing: Comment.nvim, surround.nvim, nvim-autopairs, indent-blankline.nvim, leap.nvim or flash.nvim, nvim-ufo, undotree (optional).
• Git: gitsigns.nvim.
• Markdown: render-markdown.nvim.
• Copilot: copilot.lua, copilot-cmp.
• Formatting: none-ls.nvim.

Workflow Requirements to Preserve

• Tab-per-context: each tab has its own Neo-tree root.
• Provide keymaps for: Neo-tree floating, Neo-tree sidebar toggle, and file preview. Previews should not pollute buffer list.
• Keep splits inside tabs.
• Use Telescope and LSP for navigation.
• Heavy HTML/PHP/JS/Markdown usage (WordPress plugin dev) — prioritize these languages in LSP/Treesitter.

Behaviours to Keep (modernized)

• Abbreviations: adn→and, waht→what, tehn→then, functin→function, positin→position.
• Templates: auto-populate .sh from template.
• Whitespace highlighting (use modern alternatives, e.g., listchars, plugins if needed).
• Persistent folds (prefer nvim-ufo).
• Spell & text: spelllang=en_gb, custom listchars, showbreak.

Migration Notes

• Do not edit legacy Vimscript files except to extract settings to Lua. Keep them intact until migration completes.
• Introduce init.lua and bootstrap lazy.nvim before adding plugins.
• Disable unnecessary providers early: vim.g.loaded_ruby_provider = 0, etc.
• Keep startup fast; avoid unnecessary autoloading or heavy defaults.
• When cleaning, archive existing files into a legacy/ folder within this config instead of deleting. Maintain a brief index if helpful.

Validation

• Ensure Neovim starts without errors and with minimal startup time.
• Verify tab workflow, Neo-tree behaviour, Telescope, LSP basics, and completion.
• Keep plugin count tight; remove anything unused.

Process

• Before large changes, update the task plan via the CLI update_plan tool.
• Keep the live checklist in MIGRATION_PLAN.md:1 up to date and in sync with changes.
• After any config or plugin change, immediately update MIGRATION_PLAN.md (check off items, add notes, or adjust next steps).
• After any change or decision, also update README.md:1 (decisions log and design docs).
• At the start of each phase, confirm scope and priorities for that phase.
• Execute phases via subphases (N.x), where each bullet under a phase is its own implement-and-test step (e.g., Phase 3.1, 3.2, 3.3, 3.4).
• Record decisions and rationale in README.md:1 as they’re made.
• Keep PR-sized patches; avoid broad unrelated edits.
• Document non-obvious choices in commit messages or short comments near the code that needs it.