591 lines
22 KiB
EmacsLisp
591 lines
22 KiB
EmacsLisp
;;; ellie.el --- Emacs client for ollie-9p -*- lexical-binding: t -*-
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;; Version: 0.1.0
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;; Package-Requires: ((emacs "27.1"))
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;; Keywords: tools, ai, chat
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;;; Commentary:
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;;
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;; ollie.el talks to an ollie-9p session through plain file I/O on the
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;; mounted filesystem (default: ~/mnt/ollie, or $OLLIE).
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;;
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;; Quick start:
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;;
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;; (require 'ellie) ; or use use-package / :load-path
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;; M-x ellie ; opens *ellie*, attaches to last session or creates one
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;;
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;; In the *ellie* buffer:
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;;
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;; RET open an input window to compose and submit a prompt
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;; C-c C-q open an input window to compose a queued prompt
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;; C-c C-c stop the running turn
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;; C-c C-k kill the current session
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;; C-c C-n create a new session (also bound to "n" when idle)
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;; C-c C-a attach to a different existing session
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;; C-c C-p show the rendered system prompt
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;; g force-refresh the chat log
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;;
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;; In the *ellie-input* window:
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;;
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;; C-c C-c submit
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;; C-c C-k cancel
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;;
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;; State changes while the agent is running:
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;;
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;; Writes to the backend, model, and agent files are rejected by the
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;; server when the agent is not idle. Commands sent via ctl (e.g.
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;; compact, clear, model) are dispatched asynchronously and cannot
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;; return errors; if the agent is running, the command is silently
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;; rejected. Read the state file to confirm a change took effect.
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;;; Code:
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(require 'ansi-color)
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;;;; ──────────────── Customization ────────────────
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(defgroup ellie nil
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"Emacs client for ollie-9p."
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:group 'tools
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:prefix "ellie-")
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(defcustom ellie-mount-directory
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(or (getenv "OLLIE") (expand-file-name "~/mnt/ollie"))
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"Mount point for the ollie-9p filesystem."
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:type 'directory
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:group 'ellie)
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(defcustom ellie-default-session-opts nil
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"Default options passed when creating a new session.
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An alist of (KEY . VALUE) string pairs; valid keys are
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\"backend\", \"model\", \"agent\", and \"cwd\"."
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:type '(alist :key-type string :value-type string)
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:group 'ellie)
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(defcustom ellie-poll-interval 0.5
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"Seconds between chat-file polls (used when file-notify is unavailable)."
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:type 'number
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:group 'ellie)
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(defcustom ellie-input-window-height 8
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"Height in lines of the prompt input window."
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:type 'integer
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:group 'ellie)
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;;;; ──────────────── Internal state ────────────────
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(defvar ellie--session-id nil
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"ID of the currently active session (global).")
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(defvar ellie--chat-size -1
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"Last known byte count of the chat file; -1 means unread.")
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(defvar ellie--poll-timer nil
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"Timer for periodic refresh.")
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(defconst ellie--buf "*ellie*" "Name of the chat display buffer.")
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(defconst ellie--ibuf "*ellie-input*" "Name of the prompt input buffer.")
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;;;; ──────────────── Paths ────────────────
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(defun ellie--sessions-dir ()
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(expand-file-name "s" ellie-mount-directory))
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(defun ellie--sessions-new-path ()
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(expand-file-name "new" (ellie--sessions-dir)))
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(defun ellie--session-file (name)
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"Return the full path to file NAME inside the current session directory.
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Signals `user-error' if no session is active."
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(unless ellie--session-id
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(user-error "No active ollie session"))
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(expand-file-name name
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(expand-file-name ellie--session-id (ellie--sessions-dir))))
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(defun ellie--last-session-path ()
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(expand-file-name "~/.config/ollie/last-session"))
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;;;; ──────────────── Low-level file helpers ────────────────
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(defun ellie--fwrite (path text)
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"Write TEXT to PATH, suppressing the minibuffer message."
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(write-region text nil path nil 'silent))
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(defun ellie--fread (path)
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"Return the contents of PATH as a string, or nil if it does not exist."
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(when (file-exists-p path)
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(with-temp-buffer
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(insert-file-contents path)
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(buffer-string))))
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;;;; ──────────────── Session enumeration ────────────────
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(defun ellie--session-ids ()
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"Return a list of all current session IDs."
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(let ((sdir (ellie--sessions-dir)))
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(when (file-directory-p sdir)
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(seq-filter
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(lambda (name) (not (string-prefix-p "." name)))
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(mapcar #'file-name-nondirectory
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(seq-filter #'file-directory-p
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(directory-files sdir t)))))))
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;;;; ──────────────── Last-session persistence ────────────────
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(defun ellie--persist-session (id)
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"Upsert the {cwd}TAB{id} entry for `default-directory' in the last-session file."
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(let* ((path (ellie--last-session-path))
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(cwd (expand-file-name default-directory))
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(raw (ellie--fread path))
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(lines (when raw
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(seq-filter (lambda (l) (not (string-empty-p (string-trim l))))
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(split-string raw "\n"))))
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(entry (concat cwd "\t" id))
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(found nil)
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(new-lines
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(mapcar (lambda (l)
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(let ((parts (split-string l "\t" nil nil)))
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(if (and (= (length parts) 2) (string= (car parts) cwd))
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(progn (setq found t) entry)
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l)))
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lines)))
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(make-directory (file-name-directory path) t)
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(ellie--fwrite path
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(concat (mapconcat #'identity
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(if found new-lines (append new-lines (list entry)))
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"\n")
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"\n"))))
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(defun ellie--recall-session ()
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"Return the last-used session ID for `default-directory' if it still exists, else nil."
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(let* ((path (ellie--last-session-path))
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(cwd (expand-file-name default-directory))
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(raw (ellie--fread path)))
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(when raw
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(catch 'found
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(dolist (line (split-string raw "\n"))
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(let ((parts (split-string line "\t" nil nil)))
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(when (and (= (length parts) 2)
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(string= (car parts) cwd))
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(let ((id (string-trim (cadr parts))))
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(when (and (not (string-empty-p id))
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(file-directory-p (expand-file-name id (ellie--sessions-dir))))
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(throw 'found id))))))))))
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;;;; ──────────────── Session lifecycle ────────────────
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(defun ellie-new-session (&optional opts)
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"Create a new ollie session and make it current.
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OPTS is an alist of option pairs; defaults to `ellie-default-session-opts'.
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Returns the new session ID."
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(interactive)
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(unless (file-directory-p ellie-mount-directory)
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(user-error "ollie-9p not mounted at %s (customize `ellie-mount-directory')"
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ellie-mount-directory))
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(let* ((effective-opts (or opts ellie-default-session-opts))
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;; cwd is required; inject it if not already present.
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(effective-opts (if (assoc "cwd" effective-opts)
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effective-opts
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(cons (cons "cwd" default-directory) effective-opts)))
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(before (ellie--session-ids))
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(seen (make-hash-table :test 'equal))
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(cmd (mapconcat (lambda (kv)
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(format "%s=%s" (car kv) (cdr kv)))
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effective-opts " ")))
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(dolist (id before) (puthash id t seen))
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(ellie--fwrite (ellie--sessions-new-path) (concat cmd "\n"))
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(let ((deadline (+ (float-time) 5.0))
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result)
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(while (and (not result) (< (float-time) deadline))
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(dolist (id (ellie--session-ids))
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(unless (gethash id seen) (setq result id)))
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(unless result (sleep-for 0.05)))
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(unless result
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(user-error "Timed out waiting for a new ollie session"))
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(setq ellie--session-id result)
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(ellie--persist-session result)
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(message "Created ollie session %s" result)
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result)))
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(defun ellie-attach (id)
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"Attach to an existing session by ID and make it current."
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(interactive
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(let ((ids (ellie--session-ids)))
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(unless ids (user-error "No ollie sessions available"))
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(list (completing-read "Attach to session: " ids nil t))))
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(unless (file-directory-p (expand-file-name id (ellie--sessions-dir)))
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(user-error "Session not found: %s" id))
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(setq ellie--session-id id)
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(ellie--persist-session id)
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(message "Attached to ollie session %s" id))
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(defun ellie-kill-session ()
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"Kill the current ollie session."
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(interactive)
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(unless ellie--session-id (user-error "No active session"))
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(when (yes-or-no-p (format "Kill ollie session %s? " ellie--session-id))
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(delete-directory (expand-file-name ellie--session-id (ellie--sessions-dir)) t)
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(ellie--stop-watching)
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(setq ellie--session-id nil
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ellie--chat-size -1)
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(when-let (buf (get-buffer ellie--buf))
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(with-current-buffer buf
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(let ((inhibit-read-only t))
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(erase-buffer)
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(insert "(session killed)\n\n")
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(insert "Press 'n' or C-c C-n to start a new session.\n"))))
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(message "Session killed")))
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(defun ellie-rename-session (new-name)
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"Rename the current ollie session to NEW-NAME."
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(interactive "sNew session name: ")
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(unless ellie--session-id (user-error "No active session"))
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(when (string-empty-p (string-trim new-name))
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(user-error "Empty name"))
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(let ((old-dir (expand-file-name ellie--session-id (ellie--sessions-dir)))
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(new-dir (expand-file-name new-name (ellie--sessions-dir))))
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(rename-file old-dir new-dir)
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(setq ellie--session-id new-name)
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(ellie--persist-session new-name)
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(force-mode-line-update)
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(message "Renamed session to %s" new-name)))
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;;;; ──────────────── State ────────────────
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(defun ellie--state ()
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"Return the current session state string, or \"unknown\" on any error."
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(condition-case nil
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(or (when-let (s (ellie--fread (ellie--session-file "state")))
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(string-trim s))
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"unknown")
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(error "unknown")))
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(defun ellie--idle-p ()
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"Return non-nil if the session is currently idle."
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(ignore-errors (string= (ellie--state) "idle")))
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;;;; ──────────────── Agent operations ────────────────
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(defun ellie-submit (text)
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"Submit TEXT as a prompt to the current session.
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The server dispatches it asynchronously."
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(when (string-empty-p (string-trim text))
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(user-error "Empty prompt"))
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(ellie--fwrite (ellie--session-file "prompt") text))
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(defun ellie-queue (text)
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"Enqueue TEXT as a prompt to run after the current turn finishes."
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(when (string-empty-p (string-trim text))
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(user-error "Empty prompt"))
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(ellie--fwrite (ellie--session-file "enqueue") text))
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(defun ellie-stop ()
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"Send a stop signal to the current turn."
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(interactive)
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(ellie--fwrite (ellie--session-file "ctl") "stop\n")
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(message "ollie: stopped"))
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;;;; ──────────────── Diff faces ────────────────
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(defface ellie-diff-added
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'((((background dark)) :foreground "#5faf5f")
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(((background light)) :foreground "#3a7a3a"))
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"Face for added lines in tool-result diff output."
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:group 'ellie)
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(defface ellie-diff-removed
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'((((background dark)) :foreground "#d75f5f")
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(((background light)) :foreground "#a02020"))
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"Face for removed lines in tool-result diff output."
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:group 'ellie)
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(defface ellie-diff-hunk-header
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'((((background dark)) :foreground "#5fafaf")
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(((background light)) :foreground "#1a6a6a"))
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"Face for hunk headers in tool-result diff output."
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:group 'ellie)
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;;;; ──────────────── Chat display ────────────────
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;; We cache the mtime so we only re-read the file when it actually changes.
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;; The mode-line state is updated on every refresh tick.
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(defvar-local ellie--mode-line-state "unknown"
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"Cached session state string for the mode line.")
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(defvar-local ellie--mode-line-usage ""
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"Cached usage string for the mode line.")
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(defun ellie--block-start-p (line)
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"Return non-nil if LINE begins a named chat block."
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(or (string-prefix-p "-> " line)
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(string-prefix-p "user: " line)
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(string-prefix-p "assistant: " line)
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(string-prefix-p "retrying " line)
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(string-prefix-p "error: " line)
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(string-prefix-p "agent stalled" line)))
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(defun ellie--colorize-diffs ()
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"Add diff highlighting to tool-result blocks in the current buffer.
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Must be called after `ansi-color-apply-on-region'."
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(save-excursion
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(goto-char (point-min))
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(let ((in-result nil))
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(while (not (eobp))
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(let* ((bol (point))
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(eol (line-end-position))
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(line (buffer-substring-no-properties bol eol)))
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(cond
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;; Tool call: enter result mode; don't colorize this line.
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((string-prefix-p "-> " line)
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(setq in-result t))
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;; Block-start: exit result mode; don't colorize this line.
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((and in-result (ellie--block-start-p line))
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(setq in-result nil))
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;; Inside a result block: colorize diff lines.
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(in-result
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(let ((face (cond
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((or (string-prefix-p "＋++" line)
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(string-prefix-p "−--" line)) 'shadow)
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((string-prefix-p "＋" line) 'ellie-diff-added)
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((string-prefix-p "−" line) 'ellie-diff-removed)
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((string-prefix-p "@@" line) 'ellie-diff-hunk-header))))
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(when face
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(put-text-property bol eol 'face face)))))
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(forward-line 1))))))
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(defun ellie--refresh ()
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"Refresh the chat buffer if the chat file has grown on disk.
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Also updates the cached mode-line state."
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(let* ((buf (get-buffer ellie--buf))
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(chat (condition-case nil (ellie--session-file "chat") (error nil)))
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(attrs (and chat (file-attributes chat)))
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(size (and attrs (file-attribute-size attrs))))
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(when buf
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(with-current-buffer buf
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(setq ellie--mode-line-state (ellie--state))
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(setq ellie--mode-line-usage
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(or (condition-case nil
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(when-let (s (ellie--fread (ellie--session-file "ctxsz")))
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(string-trim s))
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(error nil))
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""))
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;; The chat log is append-only, so size increasing means new content.
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(when (and size (> size ellie--chat-size))
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(setq ellie--chat-size size)
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(let ((inhibit-read-only t)
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(at-end (= (point) (point-max))))
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(erase-buffer)
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(insert-file-contents chat)
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(ansi-color-apply-on-region (point-min) (point-max))
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(ellie--colorize-diffs)
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(when at-end (goto-char (point-max)))))
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(force-mode-line-update)))))
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;;;; ──────────────── Polling ────────────────
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;; inotify does not fire on 9P mounts, so we always use a timer.
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;; The mtime check in `ellie--refresh' keeps this cheap.
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(defun ellie--start-watching ()
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"Start a periodic timer to tail the chat file."
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(ellie--stop-watching)
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(setq ellie--poll-timer
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(run-with-timer ellie-poll-interval ellie-poll-interval #'ellie--refresh)))
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(defun ellie--stop-watching ()
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"Cancel the refresh timer."
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(when ellie--poll-timer
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(cancel-timer ellie--poll-timer)
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(setq ellie--poll-timer nil)))
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;;;; ──────────────── Input buffer ────────────────
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(defvar-local ellie--input-queued nil
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"Non-nil when this input buffer will enqueue rather than submit.")
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(defvar ellie-input-mode-map
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(let ((m (make-sparse-keymap)))
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(define-key m (kbd "C-c C-c") #'ellie-input-submit)
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(define-key m (kbd "C-c C-k") #'ellie-input-cancel)
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m)
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"Keymap for `ellie-input-mode'.")
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(define-derived-mode ellie-input-mode text-mode "Ollie-Input"
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"Major mode for composing ollie prompts.
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\\{ellie-input-mode-map}"
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(setq-local header-line-format
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'(:eval
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(format " %s · C-c C-c submit · C-c C-k cancel"
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(if ellie--input-queued
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(propertize "Queue prompt" 'face 'warning)
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(propertize "Send prompt" 'face 'success))))))
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(defun ellie--open-input (&optional queued)
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"Open the prompt input window below the current window.
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QUEUED non-nil means the prompt will be enqueued, not submitted immediately."
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(let ((buf (get-buffer-create ellie--ibuf)))
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(with-current-buffer buf
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(erase-buffer)
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(ellie-input-mode)
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(setq ellie--input-queued queued))
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(display-buffer buf
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`(display-buffer-below-selected
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(window-height . ,ellie-input-window-height)))
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(when-let (win (get-buffer-window buf t))
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(select-window win))))
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(defun ellie-input-submit ()
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"Submit the contents of the input buffer as a prompt."
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(interactive)
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(let ((text (buffer-string))
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(queued ellie--input-queued))
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(ellie--close-input-window)
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(if queued
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(ellie-queue text)
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(ellie-submit text))))
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(defun ellie-input-cancel ()
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"Discard the input and close the input window."
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(interactive)
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(ellie--close-input-window))
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(defun ellie--close-input-window ()
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"Kill the input buffer and delete its window."
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(when-let (win (get-buffer-window ellie--ibuf t))
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(delete-window win))
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(when-let (buf (get-buffer ellie--ibuf))
|
||
(kill-buffer buf)))
|
||
|
||
;;;; ──────────────── Chat major mode ────────────────
|
||
|
||
(defvar ellie-mode-map
|
||
(let ((m (make-sparse-keymap)))
|
||
(define-key m (kbd "RET") #'ellie-send-input)
|
||
(define-key m (kbd "C-c C-q") #'ellie-queue-input)
|
||
(define-key m (kbd "C-c C-c") #'ellie-stop)
|
||
(define-key m (kbd "C-c C-k") #'ellie-kill-session)
|
||
(define-key m (kbd "C-c C-r") #'ellie-rename-session)
|
||
(define-key m (kbd "C-c C-n") #'ellie-new-and-open)
|
||
(define-key m (kbd "C-c C-a") #'ellie-attach-and-open)
|
||
(define-key m (kbd "C-c C-d") #'ellie-dired)
|
||
(define-key m (kbd "C-c C-p") #'ellie-show-system-prompt)
|
||
(define-key m (kbd "n") #'ellie-new-and-open)
|
||
(define-key m (kbd "g") #'ellie-refresh)
|
||
m)
|
||
"Keymap for `ellie-mode'.")
|
||
|
||
(defun ellie-send-input ()
|
||
"Open the input window to compose and submit a prompt."
|
||
(interactive)
|
||
(ellie--open-input nil))
|
||
|
||
(defun ellie-queue-input ()
|
||
"Open the input window to compose a queued prompt."
|
||
(interactive)
|
||
(ellie--open-input t))
|
||
|
||
(defun ellie-refresh ()
|
||
"Force a refresh of the chat log from disk."
|
||
(interactive)
|
||
(setq ellie--chat-size -1)
|
||
(ellie--refresh))
|
||
|
||
(defun ellie-dired ()
|
||
"Open the ollie-9p mount point in Dired."
|
||
(interactive)
|
||
(dired ellie-mount-directory))
|
||
|
||
(define-derived-mode ellie-mode special-mode "Ollie"
|
||
"Major mode for the ollie chat interface.
|
||
|
||
Key bindings:
|
||
\\{ellie-mode-map}"
|
||
:group 'ellie
|
||
(buffer-disable-undo)
|
||
(setq-local mode-line-format
|
||
`("%e"
|
||
mode-line-front-space
|
||
(:eval
|
||
(propertize (format " ellie:%s" (or ellie--session-id "-"))
|
||
'face 'mode-line-buffer-id))
|
||
(:eval
|
||
(if (string= ellie--mode-line-state "idle")
|
||
(propertize "idle" 'face 'success)
|
||
(propertize ellie--mode-line-state 'face 'warning)))
|
||
(:eval
|
||
(when (not (string-empty-p ellie--mode-line-usage))
|
||
(concat " " (replace-regexp-in-string "%" "%%" ellie--mode-line-usage))))
|
||
" "
|
||
mode-line-end-spaces)))
|
||
|
||
;;;; ──────────────── System prompt ────────────────
|
||
|
||
(defun ellie-show-system-prompt ()
|
||
"Display the rendered system prompt for the current session in a buffer."
|
||
(interactive)
|
||
(let* ((path (ellie--session-file "systemprompt"))
|
||
(text (ellie--fread path)))
|
||
(unless text
|
||
(user-error "Could not read system prompt"))
|
||
(let ((buf (get-buffer-create "*ellie-system-prompt*")))
|
||
(with-current-buffer buf
|
||
(let ((inhibit-read-only t))
|
||
(erase-buffer)
|
||
(insert text)
|
||
(goto-char (point-min)))
|
||
(view-mode 1)
|
||
(when (fboundp 'markdown-mode)
|
||
(markdown-mode)))
|
||
(pop-to-buffer buf))))
|
||
|
||
;;;; ──────────────── Entry points ────────────────
|
||
|
||
;;;###autoload
|
||
(defun ellie ()
|
||
"Open the ollie chat interface.
|
||
Attaches to the last session if it still exists; otherwise creates a new one."
|
||
(interactive)
|
||
(unless (file-directory-p ellie-mount-directory)
|
||
(user-error "ollie-9p not mounted at %s (customize `ellie-mount-directory')"
|
||
ellie-mount-directory))
|
||
(unless ellie--session-id
|
||
(if-let (last (ellie--recall-session))
|
||
(progn
|
||
(setq ellie--session-id last)
|
||
(message "Attached to last ollie session %s" last))
|
||
(ellie-new-session)))
|
||
(ellie--open-buf))
|
||
|
||
;;;###autoload
|
||
(defun ellie-new-and-open ()
|
||
"Create a new ollie session and open the chat buffer."
|
||
(interactive)
|
||
(ellie-new-session)
|
||
(ellie--open-buf))
|
||
|
||
;;;###autoload
|
||
(defun ellie-attach-and-open (id)
|
||
"Attach to session ID and open the chat buffer."
|
||
(interactive
|
||
(let ((ids (ellie--session-ids)))
|
||
(unless ids (user-error "No ollie sessions available"))
|
||
(list (completing-read "Session: " ids nil t))))
|
||
(ellie-attach id)
|
||
(ellie--open-buf))
|
||
|
||
(defun ellie--open-buf ()
|
||
"Open or switch to the *ollie* chat buffer."
|
||
(let ((buf (get-buffer-create ellie--buf)))
|
||
(with-current-buffer buf
|
||
(unless (derived-mode-p 'ellie-mode)
|
||
(ellie-mode))
|
||
(setq ellie--chat-size -1)
|
||
(ellie--refresh)
|
||
(ellie--start-watching))
|
||
(pop-to-buffer buf)))
|
||
|
||
(provide 'ellie)
|
||
;;; ellie.el ends here
|