[idea] Expand LSP keymaps — hover, rename, code action, signature help

[stanfish06]

What

The config currently maps only gd (definition) and gr (references) for LSP. The other high-value LSP actions — hover docs, rename, code action, and insert-mode signature help — have no keymaps and are only reachable via :lua vim.lsp.buf.*().

Where

lua/config/plugin_config.lua — inside a LspAttach autocmd (as already recommended in issue #27).

Why it matters

With six active LSPs (lua, python, c/cpp, ts/js, rust, go, swift), these operations are used constantly. Without keymaps they're effectively inaccessible. K for hover is the Neovim convention (it already falls back to keywordprg in non-LSP buffers so a buffer-local binding is safe). Rename and code action are unavailable any other way.

Suggested keymaps

vim.api.nvim_create_autocmd("LspAttach", {
    callback = function(ev)
        local opts = { buffer = ev.buf }
        -- navigation (see also issue #27)
        vim.keymap.set("n", "gd", vim.lsp.buf.definition, opts)
        vim.keymap.set("n", "gr", vim.lsp.buf.references, opts)
        -- hover / signature
        vim.keymap.set("n", "K",       vim.lsp.buf.hover,          opts)
        vim.keymap.set("i", "<C-k>",   vim.lsp.buf.signature_help, opts)
        -- edit
        vim.keymap.set("n", "<leader>rn", vim.lsp.buf.rename,       opts)
        vim.keymap.set("n", "<leader>ca", vim.lsp.buf.code_action,  opts)
        -- workspace
        vim.keymap.set("n", "<leader>D",  vim.lsp.buf.type_definition, opts)
    end,
})

<leader>rn / <leader>ca are free in the current keymap and follow the convention used by most Neovim starter configs. K is buffer-local so it only overrides the built-in keywordprg lookup in LSP-attached buffers.

Notes

• Consolidating all LSP keymaps into one LspAttach block (including the gd/gr from [audit] gd/gr LSP keymaps set globally — override vim builtins in every buffer #27) keeps LSP config in one place in plugin_config.lua.
• Neovim 0.11+ ships vim.lsp.buf.code_action with a floating menu by default — no extra UI plugin needed.

[stanfish06]

All of K hover, insert-mode signature help, rename, and code action are core Neovim defaults now (K/signature-help since 0.10-0.11 as i_CTRL-S, grn rename and gra code action since 0.11) — verified against Neovim's news files. gd/gri/grt are already explicitly (and deliberately) overridden in this config's LspAttach block with dedup logic, and la already covers code action. Closing as superseded by Neovim core defaults + existing config. (Duplicate ground also covered by #269 and #197, closing those too.)

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Generated by Claude Code