Changelog

All notable changes to Letta Code are documented here.

0.12.9

• Added Conversations support - each session creates an isolated conversation while sharing agent memory
• Added /resume command to browse and switch between past conversations
• Added --resume (-r) flag to resume last session (agent + conversation)
• Added --conversation (-C, --conv) flag to resume a specific conversation by ID
• Added default agents (Memo and Incognito) auto-created for new users
• Changed /clear to start a new conversation (non-destructive) instead of deleting messages
• Added /clear-messages hidden command for destructive message reset (advanced)
• Fixed Task tool rendering issues with parallel subagents
• Fixed ADE links to include conversation context
• Deprecated --continue flag (use --resume instead)

0.12.6

• Added memory subagent for cleaning up and reorganizing memory blocks
• Added defragmenting-memory built-in skill with backup/restore workflow
• Added streaming output display for long-running bash commands
• Added line count summary for Read tool results
• Added network retry for transient LLM streaming errors
• Added Skill tool support in plan mode (load/unload/refresh are read-only)
• Fixed tool approval flow that was broken by ESC handling changes
• Improved Task tool and subagent display rendering
• Fixed UI flickering in Ghostty terminal

0.12.5

• Added terminal title and progress indicator for approval screens
• Added LETTA_DEBUG_TIMINGS environment variable for request timing diagnostics
• Fixed “Create new agent” from selector being stuck in a loop

0.12.4

• Fixed subagent display spacing and extra newlines
• Fixed subagent live streaming not updating during execution

0.12.3

• Added LSP diagnostics to Read tool for TypeScript and Python files
• Added refresh command to Task tool for rescanning custom subagents
• Added file-based overflow for long tool outputs
• Fixed left/right arrow key cursor navigation in approval text inputs
• Fixed pre-stream approval desync errors with keep-alive recovery
• Fixed subagents not inheriting parent’s tool permission rules

0.12.2

• Added /ralph and /yolo-ralph commands for autonomous agentic loop mode
• Fixed read-only subagents (explore, plan, recall) to work in plan mode
• Fixed Windows PowerShell ENOENT errors with shell fallback

0.12.1

• Added recall subagent for searching parent agent’s conversation history
• Fixed agent selector not showing when LRU agent retrieval fails
• Fixed approval desync issues for slash commands and queued messages
• Fixed SDK retry race conditions on streaming requests
• Fixed pending approval denials not being cached on ESC interrupt
• Fixed stale processConversation calls affecting UI state after interrupts

0.12.0

• Refactored to use new client-side tool calling via the messages endpoint
• Added acquiring-skills skill for discovering and installing skills from external repositories
• Added migrating-memory skill for copying memory blocks between agents
• Updated skills system (migrating-memory, finding-agents, searching-messages)
• Improved interrupt handling with better messaging
• Fixed ESC interrupt to properly stop streams
• Fixed skill scripts to work when installed via npm
• Fixed Task tool (subagent) rendering issues
• Fixed bash mode exit behavior after submitting commands
• Fixed binary file detection being overly aggressive
• Fixed approval results handling when auto-handling remaining approvals
• Fixed stream retry behavior after interrupts

0.11.1

• Added system prompt and memory block configuration for headless mode
• Added --input-format stream-json flag for programmatic input handling
• Improved parallel tool call approval UI

0.11.0

• Added inline dialogs for improved user experience
• Improved token counter display
• Fixed server-side tools incorrectly showing as interrupted

0.10.5

• Fixed Windows installation issues
• Fixed keyboard shortcuts for Ctrl+C, Ctrl+V, and Shift+Enter

0.10.4

• Fixed iTerm2 keybindings
• Fixed ESC and CTRL-C handling across all dialogs

0.10.3

• Added desktop notifications when UI needs user attention
• Added read-only shell commands support in plan mode

0.10.2

• Added Ctrl+V support for clipboard image paste in all terminals
• Fixed keybindings
• Fixed model name display in welcome screen

0.10.1

• Added Shift+Enter multi-line input support

0.10.0

• Added visual diffs for Edit/Write tool returns
• Added automatic retry for transient LLM API errors
• Added custom slash commands support (/commands)
• Added scrolling and manual ordering to command autocomplete
• Added toggle to show all agents in /agents view
• Added per-resource queues for parallel tool execution
• Fixed plan mode on non-default toolsets
• Fixed CLI crash when browser auto-open fails in WSL

0.8.0

• Added GLM-4.7 model support
• Added /new command for creating new agents
• Added /feedback command improvements
• Added memory reminders to improve memory usage
• Renamed /resume to /agents (with backwards-compatible alias)
• Fixed plan mode path resolution on Windows

0.7.4

• Added support for bundled skills and multi-source skill discovery
• Increased loaded_skills block limit to 100k characters

0.7.3

• Added support for Claude Pro and Max plans
• Added optional telemetry
• Added --system flag for existing agents
• Fixed Windows-specific issues

0.7.2

• Added /help command with interactive dialog
• Added /mcp command for MCP server management
• Added /compact command for message compaction
• Added text search for all models
• Improved memory tool visibility with colored name and diff output

0.7.1

• Added BYOK (Bring Your Own Key) support - use your own API keys
• Added /usage command to check usage and credits
• Added --info flag to show project and agent info
• Added naming dialog when pinning agents

0.7.0

• Added /memory command to view agent memory blocks
• Added ‘add-model’ skill for adding new LLM models
• Added Gemini 3 Flash model support
• Added feedback UI

0.6.3

• Added support for relative paths in all tools
• Added tab completion for slash commands
• Added Kimi K2 Thinking model
• Added personalized thinking prompts with agent name
• Added goodbye message on exit
• Renamed /bashes to /bg

0.6.2

• Added stateless subagents via Task tool
• Added Kimi K2 Thinking model support
• Improved subagents UI

0.6.1

• Added autocomplete for slash commands
• Faster startup with cached tool initialization
• Added exit and quit as aliases for /exit

0.6.0

• Added profile-based persistence with startup selector
• Added /profile command for managing profiles
• Added simplified welcome screen design
• Added double Ctrl+C to exit from approval screen
• Added paginated agent list in /resume
• Added /description command to update agent description
• Added message search

0.5.2

• Added /resume command with improved agent selector UI
• Added LETTA_DEBUG environment variable for debug logging
• Added agent description support
• Added GPT-5.2 support
• Added Gemini 3 (Vertex) support

0.5.1

• Added startup status messages showing agent info

0.5.0

• Added /init command for initializing memory blocks
• Added system prompt swapping
• Changed default naming to PascalCase

0.4.1

• Added /download command to export agent file locally
• Added Skills omni-tool

0.4.0

• Added Claude Opus 4.5 support
• Added toolset switching UI
• Added --toolset flag
• Added Gemini tools support
• Added model-based toolset switching
• Added eager cancel functionality

0.3.0

• Added sleeptime memory management
• Added --sleeptime CLI flag
• Added GPT-5.1 models support
• Added Gemini-3 models support
• Added --fresh-blocks flag for isolation
• Added /swap command for model switching

0.2.0

• Added /link and /unlink commands for managing agent tools
• Added Skills support
• Added parallel tool calling
• Added multi-device sign in support
• Added agent renaming capability

0.1.16

• Added Sonnet 4.5 with 180k context window

0.1.15

• Added multiline input support
• Added --new flag for creating new memory blocks
• Added agent URL display in commands

0.1.11

• Added Claude Haiku 4.5 to model selector
• Added project-level agent persistence with auto-resume
• Added API key caching
• Added --model flag
• Added GLM-4.6 support
• Added autocomplete for commands
• Added up/down for history navigation
• Added fetch_web to default tool list

0.1.10

• Added stream-json output format

0.1.9

• Added pretty preview for file listings in approval dialog
• Added LETTA_BASE_URL environment variable support

0.1.8

• Added usage tracking
• Added ESC to cancel operations
• Added Ctrl-C exit with agent state dump

0.1.3

• Initial release of Letta Code, the memory-first coding agent