Features

Mitii combines deep workspace indexing with a safe Plan/Act agent workflow — local-first, approval-gated, and auditable.

New in v2.6

Context debugger, memory browser, checkpoint panel, 8 LLM providers, plan/act model split, MCP HTTP/SSE, git-stash checkpoints, inline diff accept/reject, Cursor-style Planner UI, and planning skills auto-load. See Recent improvements.

Why Mitii?

What makes Mitii different →

Context and indexing

• Workspace scanner respects .gitignore and .mitiiignore; auto-indexes on folder open
• FTS5 full-text search with ripgrep fallback for unindexed paths
• Tree-sitter WASM symbol extraction (100+ languages) with regex fallback
• PageRank repo map — surfaces structurally important files
• Vector search — local MiniLM via @xenova/transformers; SQLite or LanceDB backend
• Hybrid retriever + reranker — merges search, vectors, rules, mentions, git, LSP, memory
• Context debugger — live budget meters, source breakdown, dropped-item visibility
• Pinned @ context — explicit file/folder mentions always considered

Deep dive: Context & indexing →

Agent workflow

• Ask / Plan / Agent / Review modes — separate analysis from execution
• Plan vs Act models — optional cheaper planner, stronger implementer
• Tool loop — 20+ built-in tools + dynamic MCP tools
• Research subagents — spawn_research_agent for parallel read-only exploration
• Task decomposition — multi-step plans with lifecycle tracking and persistence
• Cursor-style Planner panel — phased steps, requirement analysis, skill chips, expandable step details in Plan mode
• Planning skills — auto-loads planning-and-task-breakdown and related playbooks during orchestrated planning
• Post-edit verification — configurable lint/test after Act-mode runs
• Skills catalog — .mitii/skills/SKILL.md invoked via use_skill and auto-injected during planning
• Auto-continue — agent keeps working across step-limit boundaries
• Conversation compaction — long sessions trimmed intelligently

Deep dive: Plan / Act →

Safety and control

• Five autonomy presets — safe, guided, builder, pilot, enterprise (distinct behavior)
• Five approval modes — review_all, ask_edits, ask_deletes, ask_commands, auto
• Dangerous command blocking — rm -rf, sudo, force-push, etc.
• Untrusted workspace blocking — writes/shell disabled unless opted in
• Git-stash checkpoints — restore from Checkpoints panel
• Inline diff — accept/reject in editor; optional VS Code diff tabs
• Approval cards — approve once, approve for task, or deny

Deep dive: Safety →

Memory and persistence

• Long-term memory — memory_search / memory_write with FTS5 + vector hybrid
• Memory panel — browse and clear observations in sidebar
• Post-task extraction — async summarization after completed work
• Session history — resume from History tab
• Plan persistence — SQLite + .mitii/tasks/
• JSONL audit logs — every tool, approval, token event in .mitii/logs/

Deep dive: Memory & checkpoints →

LLM providers

Eight provider types: OpenAI-compatible, OpenAI, Anthropic, Gemini, DeepSeek, Cursor, Codex, Echo.

• Native Anthropic Messages API and Gemini GenerateContent API
• Local Ollama/vLLM via OpenAI-compatible endpoint
• API keys in VS Code SecretStorage
• Connection test in settings UI

Deep dive: Providers →

MCP and integrations

• Built-in servers — filesystem, memory, sequential-thinking (keyless via npx)
• Transports — stdio, HTTP SSE, Streamable HTTP
• Remote auth — bearer tokens in headers
• Workspace config — .mitii/mcp.json, .mcp.json, VS Code settings
• Integrations UI — toggle builtins, add custom servers, view status

Deep dive: MCP →

Web fetch

• fetch_web tool — HTTP fetch for external docs and API references
• HTML stripped to plain text; network gated by safety preset

UI

React sidebar webview:

• Chat with streaming, Shiki code blocks, markdown
• History, Settings (7 tabs)
• Plan panel, approval cards, agent activity
• Context debugger, memory browser, checkpoint browser
• Pinned context, token meter, indexing status
• Context warning banner when budget is tight

Project rules

Auto-loaded from repo:

• AGENTS.md, CLAUDE.md, WARP.md, .cursorrules
• .mitii/rules, .clinerules, .cursor/rules, .continue/rules

How Mitii compares

Pain point	What Mitii does
Agent doesn't know the codebase	Background index: FTS, symbols, vectors, repo map
Wrong files in context	Hybrid retrieval + reranker + context debugger
Edits without oversight	Approval queue + inline diff + checkpoints
Plans that never get executed	Plan mode persists steps; Agent mode runs tool loop
Context runs out mid-task	Compaction, auto-continue, task state across approvals
No audit trail	JSONL session logs + approval audit table
Locked into one vendor	8 provider types + MCP + project rules from any editor
Opaque safety	Named presets + approval modes + policy engine

Tool reference

Full built-in tool catalog →