Mixai

mixai — switch between AI coding agents without losing context

Seamlessly move your work between AI coding agents — Claude Code, Codex, Cursor, and Antigravity — without losing context.

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> npm package: mixai-cli · install: npm install -g mixai-cli · repository: github.com/thinhledev/mixai

mixai is a local-first command-line tool (CLI) that works alongside the AI coding agents you already use. When you hit a usage limit, want a second opinion, or simply prefer a different agent for the next task, mixai hands off your work — full context intact — in a single command. It also gives every agent a shared, persistent memory of your project's decisions and history, so no agent ever starts from scratch.

Everything runs on your machine. Your credentials never leave your computer, and creating a hand-off never spends a single token.

Keywords: AI coding agent orchestrator, Claude Code ↔ Codex ↔ Cursor ↔ Antigravity handoff, cross-agent context handoff, persistent project memory for LLM agents, MCP memory server, agent switching CLI.

Why mixai

• 🔀 Switch agents in one command. mixai switch codex checkpoints your current Claude session and opens Codex right where you left off. Round-trip freely between all four agents — Claude ↔ Codex ↔ Cursor ↔ Antigravity.
• 🧠 Shared project memory. Decisions, constraints, and preferences are captured once and made available to every agent. Ask any agent "why did we choose X?" and the answer is already in context — no re-explaining, no re-reading old transcripts.
• ✂️ Smaller prompts, lower cost. Memory stays bounded and is compressed as it ages; search returns compact previews instead of walls of text. A built-in ledger shows exactly what each agent spends and what mixai's compression saves — measured, not guessed.
• ♻️ Survives context resets. When an agent compacts or clears its context window, mixai restores the important parts instantly from local memory — no expensive re-exploration of your repository.
• 🔌 Works with your existing tools. mixai orchestrates the native agent apps and CLIs you already have. It doesn't replace them, relay your credentials, or lock you in.

Requirements

• Node.js 22.5 or newer. Persistent-memory features use Node's built-in SQLite.
• At least one supported agent installed and signed in: Claude Code, Codex, Cursor, or Antigravity.
• macOS for one-click desktop hand-offs. Other platforms use the agents' terminal CLIs (--surface interactive).

Installation

Install the mixai-cli package from npm:

npm install -g mixai-cli
mixai status      # see which agents are installed and ready
mixai --version   # confirm the installed version

npm install sets up the mixai command globally, but it doesn't wire mixai into any project — that's a separate, per-project step, and it doesn't happen automatically:

cd your-project
mixai integrate    # once per project: hooks, MCP registration, and instruction files

This installs mixai into that project's agent config (.claude/, .codex/, .cursor/, and Antigravity's global ~/.gemini/GEMINI.md) so hand-off, memory, and context restoration happen automatically as you work — see [Automatic integration](#how-it-works) below. Without it, mixai still works, but only when you invoke it yourself (mixai switch, mixai run, mixai memory search, ...). Run mixai integrate --check anytime to confirm a project is still wired up correctly.

Hit a usage limit? Just switch

If an agent's usage limit, rate limit, or quota kicks in mid-task — a real desktop-app account can hit this independently of any CLI credentials — switch to whichever other agent still has room. Your objective, git state, and conversation carry over, so you're not re-explaining anything:

mixai switch codex      --from claude   # Claude hit its limit — pick up in Codex instead
mixai switch cursor     --from codex    # Codex is out of quota — try Cursor
mixai switch claude     --from cursor   # ...or back to Claude, if it's recovered
mixai switch antigravity --from claude  # continue in Antigravity

NOTE: Follow the instructions in the command's output, copy and paste them into the open desktop app to continue your work.

Quick start

# Hand off your latest Codex work to Claude Code
mixai switch claude --from codex

# Route a one-off task; the best available agent is chosen for you
mixai run "Explain the architecture and flag the riskiest module"

# Let the agent edit your project (read-only by default)
mixai run --write "Add input validation and tests"

# Ask your project's memory a question
mixai memory search "why did we pick Postgres over Mongo"

Commands

Working across agents

| Command | What it does | |---|---| | mixai status | Show which agents are installed, authenticated, and ready | | mixai run "" | Route a task to the best available agent (--write to allow edits, --provider to pin one) | | mixai switch | Checkpoint current work and open another agent to continue it | | mixai fork | Like switch, but branches a separate conversation and leaves the original untouched | | mixai export | Save a hand-off checkpoint without opening another agent | | mixai sessions | List local agent sessions for this project | | mixai brief | Print a fast context brief — objective, git state, relevant memory — with zero token cost |

Project memory

| Command | What it does | |---|---| | mixai memory search "" | Search project memory: decisions, past work, transcripts | | mixai memory show | Show a full memory record | | mixai memory stats | Overview of what's stored, spent, and saved | | mixai memory spend | Token/cost breakdown by agent, purpose, or day | | mixai memory savings | Measured token savings from mixai's compression | | mixai memory compact | Run memory consolidation and roll-ups by hand | | mixai memory reindex | Rebuild memory from checkpoint files |

Integration

| Command | What it does | |---|---| | mixai integrate | Wire mixai into your agents so memory and hand-off work automatically (--check, --remove) | | mixai mcp | Serve memory and hand-off tools over MCP for agents that speak it |

How it works

Token-free checkpoints. Every hand-off writes a checkpoint to .mixai/ — the objective, the conversation, git status, and a patch of your changes. No model is called, so it works even after an agent's quota is exhausted. Your repository stays the source of truth; the checkpoint is just a portable hand-off bundle.

Persistent memory that stays small. Each checkpoint is indexed into a local SQLite database and distilled into durable facts (decisions, constraints, preferences) plus a short summary. Recent history is kept verbatim; older history is progressively compressed into digests, while durable facts never expire. An agent can pick up a decision from weeks ago without the context ever growing unbounded. Search works out of the box via SQLite's FTS5 full-text index with BM25 relevance ranking, and layers in semantic search automatically if a local Ollama is available.

Cost transparency. mixai records every model call it makes with exact token counts where the provider reports them, and measures the token savings from its own compression. mixai memory spend and mixai memory savings give you the real numbers — not marketing percentages.

Automatic integration (optional). mixai integrate wires mixai into each agent's lifecycle hooks so memory updates as you work, context is restored after a compaction or reset, and — when you hit a limit — the agent can check which other agents are ready and offer to switch. Every change is an idempotent, reversible edit to your project's agent config; mixai integrate --remove undoes all of it.

Editor & MCP integration

Agents that speak MCP can call mixai's tools directly instead of shelling out. mixai integrate sets this up for you, or register it manually:

# Claude Code
claude mcp add mixai-memory -- mixai mcp --cwd /path/to/project

# Cursor: .cursor/mcp.json
{ "mcpServers": { "mixai-memory": { "command": "mixai", "args": ["mcp", "--cwd", "/path/to/project"] } } }

Exposed tools: memory_search, memory_get, memory_save, context_brief (rebuild working context after a reset), list_handoff_targets / switch_to_provider (see which other agents are ready and hand off to one, gated by your editor's own approval prompt), and the code map tools below.

Code map

Two on-demand tools help the agent navigate your repo without reading whole files:

• code_outline — lists a file's functions, classes, methods, and types with line numbers, so the agent jumps straight to the relevant lines instead of reading the whole file.
• code_find_references — finds every place a symbol is used across the repo, so renames and refactors don't miss a spot (including files you just created).

Why it saves tokens and context: the agent pulls just the structure it needs, on demand, instead of reading — and re-reading — large files. And unlike an always-loaded "repo map," these tools add nothing to every message: only the small result of a call you asked for, once. No native build and no extra dependencies, so they work anywhere mixai runs.

Configuration

Optional — everything has sensible defaults. Copy gateway.config.example.json to gateway.config.json to tune agent routing, memory limits, hook behavior, and embeddings. The file is gitignored, since commands and model choices are often machine-specific.

Privacy

• Nothing is uploaded. All data lives in .mixai/ inside your project, which is gitignored by default.
• Credentials are never copied or relayed — each agent uses its own local login.
• Checkpoints and briefs never call a model, so they cost nothing and work offline.

Development

git clone https://github.com/thinhledev/mixai
cd mixai
npm install
npm run build
npm test
npm link          # use your local build as the global `mixai` command

Provider integrations follow each vendor's official automation surface: Codex non-interactive mode, Claude Code CLI, and Cursor headless CLI.

License

[MIT](LICENSE) © Thinh Le

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: thinhledev
• Source: thinhledev/mixai
• License: MIT
• Homepage: https://www.npmjs.com/package/mixai-cli

Install and usage instructions live in the source repository linked above.