mcp-neovim-server no longer runs as a per-session npx stdio child.
It is now a MetaMCP namespace upstream on emmett (one persistent
process), reached over Streamable-HTTP via the mcp-session-pool:
Claude Code -> pool.localhost:12010/p/neovim/mcp
-> MetaMCP neovim namespace -> mcp-neovim-server -> nvim socket
- .mcp.json: stdio npx server -> streamable-http pool endpoint
- agents/companion.md + skills: tool names are now 3-segment
(mcp__neovim__neovim__vim_*) — the MetaMCP aggregation shape; the
surface description and unavailability runbook updated for the
three-link path (nvim socket / MetaMCP / session)
- README: connection-path diagram
Host side (servers/emmett, deployed separately): neovim added to
services.mcp-session-pool.upstreams; metamcp.nix seeds the neovim
mcp_servers row + mapping and adds nodejs to the unit PATH.
6.3 KiB
name, description, disable-model-invocation, allowed-tools
| name | description | disable-model-invocation | allowed-tools |
|---|---|---|---|
| claude-code-handoff | Delegate buffer-editing work to the in-editor Claude Code session managed by `coder/claudecode.nvim`. Use whenever a request would *change code in a buffer*: refactor, generate, explain-and-edit, fix a diagnostic. Opens (or focuses) the Claude Code split, attaches the relevant buffer/selection, sends an instruction, and tells the user how to accept/reject the resulting diff. Avoids duplicating Claude Code's diff UX from outside the editor. Trigger on "refactor this", "fix this in nvim", "generate the function in this buffer", "have Claude edit my file", "send this to Claude in nvim", "let Claude in the editor handle it". | false | Bash, Read, Skill, AskUserQuestion, mcp__neovim__neovim__* |
claude-code-handoff — let the in-editor Claude do the editing
Owner: nvim-agentic-companion:companion. This skill is the bridge
between you (the outer Claude Code session) and the inner
Claude Code session running in the user's nvim via
coder/claudecode.nvim. The inner session has the buffer, selection,
diagnostics, project root, and the diff-accept/reject UI. It is the
right tool for any edit that the user should review before it lands.
When this skill fires
- The user wants buffer contents modified: refactor, rename, fix, generate, complete, restructure.
- The change is bigger than a one-line vim substitute the user could do themselves.
- The user wants a diff to look at before committing.
When this skill does not fire
- Pure navigation (
editor-act). - Pure questions about state (
editor-introspect). - Edits to config files via the declarative NixVim path (those are
yours to edit with the
Edittool, then runnix run .#deploy).
The configured keymaps (current NixVim setup)
These are defined under <leader>a* in
/home/oleks/projects/servers/emmett/nixos/neovim.nix:
| Mode | Keys | Command | Purpose |
|---|---|---|---|
| n | <leader>ac |
:ClaudeCode |
Toggle the Claude split |
| n | <leader>af |
:ClaudeCodeFocus |
Move cursor to the split |
| n | <leader>ar |
:ClaudeCode --resume |
Resume previous session |
| n | <leader>aC |
:ClaudeCode --continue |
Continue last session |
| n | <leader>ab |
:ClaudeCodeAdd % |
Add current buffer |
| v | <leader>as |
:ClaudeCodeSend |
Send visual selection |
| n | <leader>aa |
:ClaudeCodeDiffAccept |
Accept the proposed diff |
| n | <leader>ad |
:ClaudeCodeDiffDeny |
Reject the proposed diff |
| n | <leader>am |
:ClaudeCodeSelectModel |
Pick model for next sess. |
| n | <leader>aS |
:ClaudeCodeStatus |
Check IDE↔Claude link |
| n | <leader>aT |
:ClaudeCodeTreeAdd |
Add file from neo-tree |
The full :ClaudeCode* command surface
When driving the editor via mcp__neovim__neovim__vim_command you have more
than the keymaps above. The complete set:
:ClaudeCode— toggle the terminal split.:ClaudeCodeFocus— smart focus/toggle (idempotent).:ClaudeCodeSelectModel— model picker, then open terminal.:ClaudeCodeSend— send the current visual selection.:ClaudeCodeAdd <file-path> [start-line] [end-line]— attach a file (or a precise range within it) to the in-editor session's context. Use the range form when only part of a large file is relevant.:ClaudeCodeDiffAccept/:ClaudeCodeDiffDeny— resolve the proposed diff in the diff tab.:ClaudeCodeStatus— print whether the WebSocket IDE link is alive. Use this when the user reports the inner Claude "not seeing" their edits.:ClaudeCodeTreeAdd— pick the file currently focused inneo-treeand add it to context.
If a future nvim update remaps any of these, prefer :ClaudeCodeStatus
to verify the bridge before debugging further.
If the user remaps these, re-introspect via editor-introspect before
quoting them.
Handoff procedure
-
Confirm the split is open. Either ask
editor-introspectto check for a Claude Code buffer/window, or just run:ClaudeCodeviamcp__neovim__neovim__vim_command— the command is idempotent (toggles, but if already visible the user sees no surprise). -
Attach the right context.
- If a buffer-level change:
:ClaudeCodeAdd %(current buffer) or:ClaudeCodeAdd <path>(a specific file). - If a selection-level change: the user must have a visual
selection. If they don't, ask them to make one, or offer
editor-actto highlight the relevant range first.
- If a buffer-level change:
-
Send the instruction. Phrase it as the user would speak to an agent that already has the file open. Example: instead of "in neovim.nix add a keymap for ...", say "add a
<leader>twkeymap that toggles wrap, next to the existing wrap-toggle block." Send via:ClaudeCodeSend(after selection) or by typing the prompt into the Claude Code buffer (mcp__neovim__neovim__vim_commandplus an explicit feedkeys is overkill — usually the user can type it themselves once focus is in the split).For partial-file context (large file, only one function matters) prefer
:ClaudeCodeAdd <path> <start> <end>over sending the entire buffer. The inner Claude sees a precise range; cheaper and more accurate. Example::ClaudeCodeAdd src/foo.rs 120 180. -
Brief the user. One sentence: where the conversation is happening (the split), what to expect (a proposed diff), and the accept/reject keys. Example:
Sent to the Claude Code split. You'll see a proposed diff —
<leader>aato accept,<leader>adto reject. -
Stop. Don't try to mirror or predict the inner session's output. The user will come back with the result, and you can resume from there.
Avoiding double-work
If the user is already inside the Claude Code split typing to the inner session, do not also try to do the edit yourself. Either:
- Stay quiet on the editing question and only handle introspection / navigation side requests, or
- Acknowledge: "the inner Claude is on it — ping me back if it stalls or you want a second opinion."
The whole point of the handoff is to avoid two agents editing the same buffer with different mental models.