DriftPaca

Demo:

demo.mp4

A beautiful, open-source AI chat client for Ollama with a modern glass-inspired UI.

Features

• Glass UI -- frosted glass effects on the sidebar, prompt bar, and bottom sheets
• Thinking visualization -- pulsing sparkle animation while models reason, with duration tracking
• Floating prompt bar -- translucent, always-accessible input with backdrop blur
• Compact chat layout -- clean message bubbles with inline Copy and Regenerate actions
• Sidebar with context menu -- long-press any chat to rename or delete with an animated glass popup
• Multi-model support -- local Ollama or Ollama Cloud, switch models per conversation
• Per-chat configuration -- system prompts, temperature, and advanced options per conversation
• Encrypted cloud traffic -- TLS/HTTPS for every Ollama Cloud and web search request, with the TLS session reused across calls for low latency
• Cross-platform -- iOS, Android, macOS, Linux, Windows

Getting Started

Prerequisites

• Flutter 3.x+
• Ollama Ollama Cloud API key

Run

git clone https://github.com/SongTonyLi/DriftPaca.git
cd DriftPaca
flutter pub get
flutter run

iOS

# List connected devices to find your device ID
flutter devices

# Simulator
flutter run -d <simulator-id>

# Physical device (release build required)
flutter build ios --release
flutter install -d <device-id>

Agent Memory

DriftPaca uses a three-tier memory architecture to personalize conversations without cross-chat contamination.

                          +------------------+
                          |   User Message   |
                          +--------+---------+
                                   |
                    +--------------v---------------+
                    |  1. TOPIC SELECTION (pre-msg)|
                    |  Lightweight LLM call picks  |
                    |  relevant keys from Tier 2+3 |
                    +--------------+---------------+
                                   |
                    +--------------v---------------+
                    |    BUILD SYSTEM PROMPT       |
                    |                              |
                    |  +-------------------------+ |
                    |  | System Info (runtime)   | |  <-- always injected
                    |  | Current time, timezone  | |
                    |  +-------------------------+ |
                    |  | Tier 1: Stable Profile  | |  <-- always injected
                    |  | Name, language, tone,   | |
                    |  | role, talking style     | |
                    |  +-------------------------+ |
                    |  | Tier 2+3: Selected Only | |  <-- selectively injected
                    |  | [topic: Flutter dev] ...| |
                    |  | [recent: debugging] ... | |
                    |  +-------------------------+ |
                    |  | Conversation Memory     | |  <-- always (per-chat)
                    |  | Summary, key context ...| |
                    |  +-------------------------+ |
                    +--------------+---------------+
                                   |
                    +--------------v---------------+
                    |       LLM RESPONSE           |
                    +--------------+---------------+
                                   |
                    +--------------v---------------+
                    |  2. MEMORY UPDATE (post-msg) |
                    |  Fire-and-forget LLM call    |
                    +--------------+---------------+
                                   |
              +--------------------+---------------------+
              |                    |                     |
   +----------v----------+ +-------v--------+ +----------v---------+
   | Tier 1: Profile     | | Tier 2: Topics | | Tier 3: Ephemeral  |
   | HIGH confidence only| | Create/Update/ | | Auto-expires (TTL) |
   | Name, language,     | | Merge organic  | | "debugging crash", |
   | tone, role, style   | | topic entries  | | "writing essay"    |
   +---------------------+ +----------------+ +--------------------+
              |                    |                     |
              +--------------------+---------------------+
                                   |
                            +------v------+
                            |   SQLite DB |
                            +-------------+

Anti-contamination guarantees:

• Profile only updates on high-confidence, stable observations
• Topic-specific knowledge is scoped and selectively injected per-conversation
• Ephemeral context auto-expires after 7-14 days
• If topic selection fails, only safe universal profile is injected
• Incognito chats skip agent memory entirely

Architecture

lib/
  Constants/     App constants and config
  Extensions/    Dart extensions (markdown styling)
  Models/        Data models (chat, message, model)
  Pages/         Main pages (chat, settings)
  Providers/     State management (Provider)
  Services/      Business logic (database, API, web search)
  Utils/         Utilities (scroll physics, size observer)
  Widgets/       Reusable widgets (drawer, app bar, bottom sheets)

Built With

• Flutter + Provider for state management
• SQLite for local chat persistence
• Ollama API for model inference
• flutter_markdown + LaTeX for rich content rendering

License

This project is open source. See LICENSE for details.

Acknowledgments

Originally forked from Reins by Ibrahim Cetin.