The next claudecode.nvim release. Merging this PR creates the release tag and GitHub Release, then starts Communique GitHub Release note generation.

[0.4.0] - 2026-06-23

Added

• :ClaudeCodeSendText {text} command and require("claudecode.terminal").send_to_terminal(text, opts) to send arbitrary text to the open Claude terminal as if typed at the prompt (submitting by default; :ClaudeCodeSendText! inserts without submitting). Multi-line text is sent via bracketed paste. Works with the in-editor native/snacks providers only. (#272, #197)
• :checkhealth claudecode health check that verifies Neovim version, setup(), the Claude CLI, the terminal provider, the WebSocket server, the lock file, and live client connection. (#275)
• :ClaudeCodeCloseAllDiffs command to close all pending Claude diffs at once; already-accepted-but-unwritten diffs are left intact so saved edits are never discarded. (#261, #248)
• diff_opts.layout = "unified": a VS Code-style unified diff rendered in a single buffer with interleaved deleted (red/strikethrough) and added (green) lines, as a compact alternative to "vertical"/"horizontal". Requires Neovim >= 0.9.0; ClaudeCodeInlineDiffAdd/Delete/AddSign/DeleteSign highlight groups are customizable. (#195, #295)
• terminal.auto_insert option (default true) controlling whether the Claude terminal auto-enters insert/terminal mode on focus; set auto_insert = false to preserve your Normal-mode scroll position. Applies to the native/snacks providers and the new-tab diff terminal. (#233)
• terminal.diff_split_width_percentage (optional terminal width while a diff is open), diff_opts.auto_resize_terminal (default true; set false to own the layout), and User autocmds ClaudeCodeDiffOpened/ClaudeCodeDiffClosed carrying data payloads. (#270)
• User ClaudeCodeSendComplete autocmd, fired once per file when a send is accepted while Claude is connected, with data = { file_path, start_line, end_line, context } (0-indexed lines). Lets you focus a Claude session running outside Neovim (provider = "none"/"external"). (#265, #228)
• netrw file-selection support: <leader>as in netrw buffers adds marked or cursor files to Claude's context. (#62)
• snacks.nvim picker support for :ClaudeCodeTreeAdd/:ClaudeCodeSend: with a snacks picker list focused, the selected/highlighted file(s) are added to Claude's context. (#269, #192)
• Modernized model picker with evergreen labels (Claude Opus (Latest), Claude Sonnet (Latest), Claude Haiku (Latest)), 1M-context variants (opus[1m]/sonnet[1m]), and Default (account recommended). (#256)

Fixed

• Auth token for the IDE lock file is now generated from a CSPRNG (128-bit hex) and the lock file is written atomically with 0600 permissions in a 0700 directory (previously world-readable 0644); handshake auth comparison is constant-time. (#259)
• The WebSocket server now closes connections on malformed frames (with the correct RFC 6455 close code) instead of stalling forever on un-drainable buffers. (#258)
• Parallel Neovim instances no longer fail to start with EADDRINUSE: port selection is re-seeded per process and the server retries the next candidate port on bind/listen failure. (#284, #283)
• closeAllDiffTabs is now scoped to claudecode's own diffs and no longer destroys an open diffview.nvim, fugitive, or native :diffsplit review; openFile/openDiff no longer reuse a window that is in diff mode. (#290, #277)
• The Claude terminal now excludes loopback hosts (localhost, 127.0.0.1, ::1) from no_proxy/NO_PROXY, so a configured proxy no longer tunnels Claude's ws://127.0.0.1 IDE connection and times out @ mentions. (#268, #70)
• Rejecting a Claude diff with :q/:close/<C-w>c/closing the tab now resolves it as rejected via a new WinClosed autocmd. (#266)
• Quickly-made visual selections are now pushed to Claude reliably: selections are flushed synchronously on visual-mode exit and persist until the cursor moves, fixing single-line selections that previously never reached Claude (especially in the /ide external flow). (#267, #246)
• Diffs opened via openDiff are now auto-closed when the client that opened them disconnects or the integration stops, instead of lingering forever. (#261, #248)
• Diffs now open when the Claude terminal is the only window, by creating a split instead of failing with "No suitable editor window found". (#260)
• Fixed the "climbing cursor" in the Snacks terminal on hide/show toggle by parking floats via nvim_win_set_config({hide=...}) and recreating splits like the native provider (float fix requires Neovim >= 0.10). (#271)
• Worked around a Neovim core bug (< 0.12.2) that fragmented large bracketed pastes into the terminal, via a version-gated vim.paste shim controlled by terminal.fix_streamed_paste ("auto" by default; no-op on Neovim >= 0.12.2). (#252)
• Prevented a segfault (exit 139) when accepting a new-file diff with render-markdown.nvim installed, by calling diffoff before Neovim's post-write redraw. (#224)
• Legacy diff_opts.vertical_split/open_in_current_tab options now apply correctly (they were silently ignored due to merge order). (#142)
• Detect system sleep/wake and reset keepalive timestamps so clients aren't falsely disconnected after a laptop wakes. (#141)
• IDE diagnostics now work when the tool is called with a bare file path instead of a file:// URI. (#163)
• getDiagnostics returns grouped URI-based payloads with editor-native ranges and severity names; the unsupported resources capability is no longer advertised; background file opens preserve focus and serialize JSON compactly. (#274)
• Selection context is now also sent on BufEnter, so switching buffers without moving the cursor updates Claude. (#159)
• Selection-context fallback for third-party (provider = "none") terminals now matches by substring, since Neovim rewrites buffer names to paths/URLs. (#160)
• ClaudeCodeSend now classifies tree/explorer buffers by filetype only, so ordinary files whose path contains neo-tree/NvimTree are no longer misrouted. (#292, #289)
• Handle $ in file paths for :ClaudeCodeAdd and the openFile tool. (#286)
• Snacks Explorer and snacks picker windows are no longer mistaken for the main editor window when opening diffs, preventing corrupted explorer layouts. (#255, #165)
• Fixed a Snacks launch failure caused by shell-glob interpretation of model aliases like opus[1m]; the command is now passed as an argv list with no shell. (#256)
• keep_terminal_focus now works for floating Claude terminals (e.g. Snacks position="float"). (#178)
• Plugin-created diff splits are now closed deterministically on cleanup, and a stranded empty tab is closed if open_in_new_tab diff setup errors. (#175, #264)
• An empty scratch buffer left over when the terminal provider is none is now wiped on diff open. (#223)
• Updated Haiku to the 4.5 model version. (#146)

Changed

• The diff layout value "inline" (added in feat(diff): add layout = "inline" for VS Code-style unified diff #195, never released) was renamed to "unified"; the old value is rejected. (#295)

Maintained by the release-please workflow. CHANGELOG.md and the release PR body are regenerated by Communique on every push to main, so manual edits to this PR are overwritten.