v0.0.87

This release marks a significant evolution in ollama_chat, introducing robust
session management, a deeper RAG pipeline, and a suite of powerful new tools
for developers.

✨ New Features

🗄️ Advanced Session & State Management

• Sequel-Backed Storage: Transitioned to a professional database for
  persistent storage of sessions, model options, favourites, and prompts.
• Exclusive Locking: Implemented Vim-style session locking
  (locked_by_pid) to prevent concurrent access and data corruption.
• Enhanced Workflow:
  • Added /session previous for rapid context switching.
  • Added /session duplicate for branching experiments.
  • Introduced directory-aware session retrieval via working_directory.
  • Added the -n startup flag to jump straight into a new session.

🎭 Personae & Prompt Engineering

• Database Registry: System and user prompts are now managed via a database
  registry rather than static files.
• Character Import: Support for importing high-fidelity character profiles
  from .json and .png files (extracting data from tEXt chunks).
• Dynamic Profiles: Added variable interpolation (e.g., {{user}}) to
  allow personae to adapt to the current user.
• Management Suite: New /character command and a full set of add,
  edit, delete, duplicate, and export subcommands for prompts and
  personae.

📚 RAG & Document Intelligence

• Multi-Collection Support: Now supports multiple document collections. You
  can specify which collection to query during retrieval.
• Document Tagging: Introduced tagging for embeddings and retrieval,
  including a new -t flag for the /input command.
• Lifecycle Management: Added the ability to update specific collections
  and re-embed modified sources without wiping the entire store.
• Documentrix Upgrade: Fully integrated documentrix v0.4.0.

🛠️ Expanded Toolset

• EvalRuby: Execute Ruby code in a secure, sandboxed Docker container.
• GenerateImage: Native integration with ComfyUI for AI image generation.
• GetGHR: Fetch GitHub release information directly from the chat.
• ComputeBMI & RollDice: Added utility tools for health calculations
  and tabletop gaming.
• Destructive Ops: DeleteFile and MoveFile now include automatic safety
  backups.
• Interactive Patching: PatchFile has been overhauled to use interactive
  diff sessions (e.g., vimdiff).

🎨 User Experience (UX)

• Reline Integration: Switched from Readline to Reline for superior
  history management and input prefilling.
• Real-time Feedback: Added a streaming infobar to provide visual
  progress for long-running tasks like session summarization.
• Visual Cues: Integrated a set of status emojis (🔓, 🔐, 🟢, ⚫️)
  for clearer state and session selection.
• Clipboard Power: Implemented bidirectional clipboard editing for /copy
  and /paste.
• Pager Control: Added a -p flag to /last to bypass the pager for quick
  skimming.

⚙️ Refactorings & Hardening

🛡️ Security & Stability

• Shell Injection Protection: Hardened all tool executions by switching to
  array-based system calls and implementing Shellwords.escape.
• Symlink Protection: Enhanced PathValidator to prevent directory
  traversal attacks using realpath.
• Storage Migration: Moved the documents database to OC::XDG_STATE_HOME
  for better compliance with XDG standards.

🏗️ Core Improvements

• Unified I/O: Refactored MessageList to support both JSON and JSONL
  formats via a new JSONJSONLIO utility.
• Stateful Selection: Refactored the Chooser into a stateful mixin for
  more consistent UI behavior.
• CI Update: Switched CI images to debian trixie to ensure stability
  across Ruby 3.2 through 4.0.