On <2026-06-03 Wed> I somehow bumped into idea to use emacsclient as EDITOR in Claude Code.

Turns out CC respects EDITOR env variable, either from environment or configured in ~/.claude/settings.json:

{"env": {"EDITOR": "emacsclient", "VISUAL": "emacsclient"}}

Even if [Feature Request] Allow configuring external editor for Ctrl-G prompt editing · Issue #18990 · anthropics/claude-code is still in open.

In that issue I spotted this project: gradigit/claude-pager. Fast C transcript pager for Claude Code: no blank Ctrl-G screen, clickable links/files, queued prompt composer. And its sister editor: gradigit/turbodraft.

Tried both. Turbodraft - I don't need another text editor rather than Emacs, so skipping it. But claude-pager looks useful, so I forked it.

First, I wired Emacs into claude-pager; so that it renders transcripts in both CC screen when it waits for the prompt + adds it to Emacs temporary buffer.

This mostly solves clunkiness of copying from claude terminal into Emacs and back - now I press {C-g} in claude and continue editing in Emacs.

Related to Agent SDK billing and parting ways with agent-shell.

This is how my env block looks like in ~/.claude/settings.json.

{
  "env": {
    "EDITOR": "/Users/pavel/.velppa/claude-pager/bin/claude-pager-open",
    "CLAUDE_PAGER_EDITOR": "/Users/pavel/.velppa/claude-pager/emacs/claude-emacs-prompt",
    "CLAUDE_PAGER_EDITOR_TYPE": "gui"
  }
}

{C-g} in claude opens claude-pager-open that generates transcript and pastes it into both terminal and to the temp file to edit in Emacs, then runs claude-emacs-prompt shell file that calls elisp file which loads into the buffer, assigns keybindings etc.

Setup involves adding hooks:

SessionStart hook:
     26:            "command": "/Users/pavel/.velppa/claude-pager/shim/save-session-transcript.sh"

Then I rewrote the binary from C to Zig. Rewrite used Superpowers to develop a spec first, then launch a series of agents. It took 4+ hours for CC to finish rewrite, it was ready in the morning. It used all extra usage (42 EUR) in fast mode in first 20 minutes.

7000 loc in C => ??? in Zig.

easy-kill Emacs package allows killing multiple things, switching between them on the fly. I use it to quickly grab the buffer-file-name (full path or file name only), using {M-w b}.

github

leoliu/easy-kill

Keybindings:

{M-w} without active region

copy current line, same as {x y} in meow-normal-mode

{M-w C-w} without active region

kill current line, same as {x s} in meow-normal-mode

{M-w b}

copy current full path to buffer-file-name

{M-w b 0}

copy current buffer-file-name

{M-w b -}

copy current directory

On <2026-06-04 Thu> I added {M-w B} to copy current buffer-name, useful to paste into Claude Code (running under ghostel for me).

Here's the configuration block:

(use-package easy-kill
  :config
  (keymap-global-set "<remap> <kill-ring-save>" #'easy-kill)
  (defun easy-kill-on-buffer-name (_n)
    "Get current `buffer-name'."
    (if (easy-kill-get mark)
        (easy-kill-echo "Not supported in `easy-mark'")
      (easy-kill-adjust-candidate 'buffer-name (buffer-name))))
  (add-to-list 'easy-kill-alist '(?B buffer-name)))

1. Define function easy-kill-on-buffer-name.
2. Add binding to 'easy-kill-alist.

Emacs supports Unicode:

(insert-char (char-from-name "T-REX")) ;; 🦖

To have fun with kids, I wrapped kids-unicode minor mode that brings keymap redefining every key to insert emoji. Enable with {M-x kids-unicode-mode} and have fun typing, encoding names with emojis and train memory.

(use-package kids-unicode-mode :ensure nil)

Source: kids-unicode-mode.el

Showcase:

At work I work with Terraform, so need to edit quite a lot of tf files in GNU Emacs. There's no built-in terraform-ts-mode Emacs package and I don't want to install regexp-based terraform-mode package

Existing terraform-ts-mode is this: kgrotel/terraform-ts-mode, which claims being experimental. So it's a good opportunity to learn how to create major modes using Tree Sitter and on <2026-05-05 Tue> I built my own with Claude Code.

Installation: put terraform-ts-mode.el to load-path.

Usage:

(use-package terraform-ts-mode :ensure nil
  :init
  (add-to-list 'major-mode-remap-alist '(terraform-mode . terraform-ts-mode)))

With this knowledge, the next step is [TK: try mickeynp/combobulate package].

Let's build a legible frontend for HackerNews.

Goals:

• Bigger fonts
• Dark theme
• Better favourites

Results:

• https://hotter.surge.sh/hn/ – JS-based version
• https://hn.ptpf29qr6x.workers.dev – Cloudflare Workers version (so eww-friendly)

Project node is HackerNews legible frontend.

Let's talk about two semantic and useful prefixes in GNU Emacs - M-s and M-g. Semantics is there - M-s is for "search", M-g is for "go".