Changelog

• Models: Added support for OpenAI's new models:
  • gpt-4.1 (128K context)
  • gpt-4.1-mini (128K context)
  • gpt-4.1-nano (128K context)
  • o3 (200K context, reasoning model)
  • o4-mini (200K context, reasoning model)

• -p, --print Flag: Run in non-interactive batch mode. Processes input message or piped stdin without TUI, prints agent response directly to stdout. Ideal for scripting, piping, and CI/CD integration. Exits after first response.
• -P, --print-streaming Flag: Like -p, but streams response tokens as they arrive. Use --print-streaming --no-markdown for raw unformatted output.
• --print-turn Flag: Continue processing tool calls and agent turns until the agent naturally finishes or requires user input. Combine with -p for complete multi-turn conversations.
• --no-markdown Flag: Output raw text without Markdown formatting. Useful when piping output to tools that expect plain text.
• Streaming Print Mode: Added internal printStreaming option for streaming output in non-TUI mode.
• RPC Mode print Command: Send {"type":"print","content":"text"} to get formatted print output via print_output events.
• Auto-Save in Print Mode: Print mode conversations are automatically saved to the session directory, allowing later resumption with --continue.
• Thinking level options: Added --thinking-off, --thinking-minimal, --thinking-low, --thinking-medium, --thinking-high flags for directly specifying thinking level without the selector UI.

• Simplified RPC Protocol: Replaced the prompt wrapper command with direct message objects. Send {"role":"user","content":"text"} instead of {"type":"prompt","message":"text"}. Better aligns with message format throughout the codebase.
• RPC Message Handling: Agent now processes raw message objects directly, with timestamp auto-populated if missing.

• Change Ctrl+I to Ctrl+P for model cycling shortcut to avoid collision with Tab key in some terminals

• Absolute glob patterns (e.g., /Users/foo/**/*.ts) are now handled correctly. Previously the leading / was being stripped, causing the pattern to be interpreted relative to the current directory.

• Fix read path traversal vulnerability. Paths are now validated to prevent reading outside the working directory or its parents. The read tool can read from cwd, its ancestors (for config files), and all descendants. Symlinks are resolved before validation.

• Fix --system-prompt <path> allowing the path argument to be captured by the message collection, causing "file not found" errors.

• Fixed fatal error "Cannot set properties of undefined (setting '0')" when editing empty files in the edit tool.
• Simplified edit tool output: Shows only "Edited file.txt" for successful edits instead of verbose search/replace details.
• Fixed fatal error in footer rendering when token counts contain NaN values due to missing usage data.

• Fixed chat rendering crash when messages contain preformatted/styled text (e.g., thinking traces with gray italic styling). The markdown renderer now preserves existing ANSI escape codes when they appear before inline elements.

• Fix file drop functionality for absolute paths

• Fixed TUI crash when pasting content containing tab characters. Tabs are now converted to 4 spaces before insertion.
• Fixed terminal corruption after exit when shell integration sequences (OSC 133) appeared in bash output. These sequences are now stripped along with other ANSI codes.

• Added fd integration for file path autocompletion. Now uses fd for faster fuzzy file search

• File-based Slash Commands: Create custom reusable prompts as .txt files in ~/.pi/slash-commands/. Files become /filename commands with first-line descriptions. Supports {{selection}} placeholder for referencing selected/attached content.
• /branch Command: Create conversation branches from any previous user message. Opens a selector to pick a message, then creates a new session file starting from that point. Original message text is placed in the editor for modification.
• Unified Content References: Both @path in messages and --file path CLI arguments now use the same attachment system with consistent MIME type detection.
• Drag & Drop Files: Drop files onto the terminal to attach them to your message. Supports multiple files and both text and image content.

• Model Selector with Search: The /model command now opens a searchable list. Type to filter models by name, use arrows to navigate, Enter to select.
• Improved File Autocomplete: File path completion after @ now supports fuzzy matching and shows file/directory indicators.
• Session Selector with Search: The --resume and --session flags now open a searchable session list with fuzzy filtering.
• Attachment Display: Files added via @path are now shown as "Attached: filename" in the user message, separate from the prompt text.
• Tab Completion: Tab key now triggers file path autocompletion anywhere in the editor, not just after @ symbol.

• Show base64-truncated indicator for large images in tool output

• Full multimodal support: attach images (PNG, JPEG, GIF, WebP) and PDFs to prompts using @path syntax or --file flag

• Removed padding on first user message in TUI to improve visual consistency.

• Added RPC mode (--rpc) for programmatic integration. Accepts JSON commands on stdin, emits JSON events on stdout. See RPC mode documentation for protocol details.

• Refactored internal architecture to support multiple frontends (TUI, RPC) with shared agent logic.

• Added thinking level persistence. Default level stored in ~/.pi/settings.json, restored on startup. Per-session overrides saved in session files.
• Added model cycling shortcut: Ctrl+I cycles through available models (or scoped models with -m flag).
• Added automatic retry with exponential backoff for transient API errors (network issues, 500s, overload).
• Cumulative token usage now shown in footer (total tokens used across all messages in session).
• Added --system-prompt flag to override default system prompt with custom text or file contents.
• Footer now shows estimated total cost in USD based on model pricing.

• Replaced --models flag with -m/--model supporting multiple values. Specify models as provider/model@thinking (e.g., anthropic/claude-sonnet-4-20250514@high). Multiple -m flags scope available models for the session.
• Thinking level border now persists visually after selector closes.
• Improved tool result display with collapsible output (default collapsed, expand with Ctrl+O).

• Add custom model configuration via ~/.pi/models.json

Initial public release.

• Interactive TUI with streaming responses
• Conversation session management with --continue, --resume, and --session flags
• Multi-line input support (Shift+Enter or Option+Enter for new lines)
• Tool execution: read, write, edit, bash, glob, grep, think
• Thinking mode support for Claude with visual indicator and /thinking selector
• File path autocompletion with @ prefix
• Slash command autocompletion
• /export command for HTML session export
• /model command for runtime model switching
• /session command for session statistics
• Model provider support: Anthropic (Claude), OpenAI, Google (Gemini)
• Git branch display in footer
• Message queueing during streaming responses
• OAuth integration for Gmail and Google Calendar access
• HTML export with syntax highlighting and collapsible sections