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+# Original project brief
+
+This is the brief llamachat was built from, kept for historical reference.
+It describes the v1 target; see the README for what the code actually does
+and the CHANGELOG for what changed since.
+
+## Context
+
+The backend is a llama.cpp server running in router mode, configured through
+a `presets.ini` file that defines multiple models, including at least one
+vision-capable model paired with an mmproj file. The server exposes an
+OpenAI-compatible API on localhost.
+
+The target desktop is Slackware with Hyprland on Wayland, using qt6ct and
+Kvantum for Qt theming.
+
+## Goals
+
+- A lightweight PySide6 (Qt6) desktop app, not a browser-based or Electron
+  solution. It should pick up the system Qt theme rather than fighting it.
+- Toggled via a global keyboard shortcut bound in Hyprland, behaving like a
+  scratchpad: press once to show, press again to hide. This requires the
+  app to run as a single persistent background process that listens on a
+  Unix domain socket for a toggle signal, rather than spawning a new
+  process/window per invocation.
+- Two chat modes:
+  1. **One-shot**: quick single question/answer, no multi-turn context.
+  2. **Chat**: persistent multi-turn conversation, resumable.
+  Both are saved to history and searchable. The UI should make the mode
+  switch obvious and easy (e.g. a toggle or tab, not buried in a menu).
+- **Model selection**: a dropdown/picker populated from the models
+  currently available on the llama.cpp router (query `/v1/models` or
+  equivalent at runtime, do not hardcode model names).
+- **File attachment**: both drag-and-drop onto the chat window and a
+  standard file picker dialog.
+  - Text/code files: read content and inject into context (with reasonable
+    size limits and a truncation warning if the file is too large for the
+    active model's context window).
+  - Image files: only valid when a vision-capable (mmproj-paired) model is
+    selected. If an image is dropped while a non-vision model is active,
+    prompt to switch to the vision preset (this triggers a router-side
+    unload/reload, so show a "loading model..." state, expect a
+    multi-second delay, do not treat it as instant).
+- **History**: stored in SQLite, covering both one-shot and chat-mode
+  sessions. Needs:
+  - A browsable list (most recent first) that can be scrolled and reopened.
+  - Full-text search across past conversations (use SQLite FTS5).
+  - Reopening a past chat-mode conversation should allow continuing it
+    (append new messages with prior context intact). Reopening a one-shot
+    entry is read-only reference, no continuation needed.
+  - No automatic "model searches its own history" / RAG feature in this
+    version. Explicitly out of scope for v1.
+- **Streaming responses**: use the OpenAI-compatible streaming endpoint so
+  responses render token-by-token, not as one blocking call.
+
+## Non-goals for v1
+
+- No RAG / embedding-based history search.
+- No multi-user support.
+- No cloud fallback or non-local model support.
+- No mobile/remote access, this is a local desktop tool only.
+
+## Technical constraints
+
+- Python 3, PySide6 for GUI.
+- `httpx` (with streaming support) for talking to the llama.cpp OpenAI-
+  compatible API.
+- SQLite (stdlib `sqlite3`) with an FTS5 virtual table for search.
+- Unix domain socket for IPC between the Hyprland keybind and the running
+  app instance (toggle show/hide). Provide the small client-side command
+  the Hyprland keybind should call.
+- Config (backend URL, socket path, default model, etc.) in a simple file,
+  not hardcoded, e.g. `~/.config/llamachat/config.toml`.
+- Target platform is Slackware/Hyprland/Wayland specifically, so avoid
+  anything X11-only or assuming GNOME/KDE session services are present.
+- The Hyprland config is written in **Lua** (Hyprland 0.55+, which replaced
+  the older hyprlang `.conf` format). Use Lua syntax throughout (keybinds,
+  window rules, and the autostart entry as Lua function calls), not
+  old-style `key = value` hyprlang lines. Do not assume backward
+  compatibility with hyprlang is present, target Lua only.
+
+## Process
+
+1. Confirm the llama.cpp router port/endpoint and presets.ini model naming
+   convention before assuming them.
+2. Propose the SQLite schema (tables for sessions, messages, attachments)
+   and the FTS5 setup before implementing.
+3. Propose the Unix socket protocol (message format for toggle/show/hide,
+   and any future commands) before implementing.
+4. Provide the Hyprland config snippets needed (window rule for
+   floating/scratchpad behavior, autostart line, keybind) as part of the
+   deliverable, not just the Python app.
+5. Keep the UI minimal: model picker, mode toggle, chat/input area,
+   drag-drop zone, history sidebar or panel. No feature creep beyond what
+   is listed above.
+
+Work through this iteratively: propose the architecture and schema first,
+review, then implement.