Slife

Terminal-based AI agent — a function-calling loop with minimum harness. Chat with an LLM that calls tools, remembers every turn, and orchestrates other agents.

You: "Find all TODO comments and create GitHub issues"
  → LLM calls search_content("TODO")
  → LLM calls github__create_issue(...) for each one
  → LLM: "Created 7 issues. All linked above."

One TUI window around an LLM tool loop: up to 50 native tools in 14 categories (plus 2 harness tools), five built-in plugin services, always-on memory with hybrid search, inline images, runtime model switching across three API backends, and an agent-to-agent mesh — everything presented to the LLM as uniform OpenAI-style function definitions.

Requires Python 3.13+. Runs on Windows (native & WSL), macOS, and Linux.

Install

Zero prerequisites. The install script auto-installs uv, Node.js, and bun if needed. On WSL, Linux-native versions are installed (Windows executables cannot receive custom env vars via WSL interop). Mosquitto (only needed for the A2A MQTT mesh) is offered interactively.

macOS / Linux / WSL

# Global
curl -fsSL https://raw.githubusercontent.com/juzcn/slife/main/install.sh | bash
# China mainland
curl -fsSL https://gitee.com/juzcn/slife/raw/main/install.sh | bash

Windows PowerShell

# Global
powershell -ExecutionPolicy Bypass -Command "irm https://raw.githubusercontent.com/juzcn/slife/main/install.ps1 | iex"
# China mainland
powershell -ExecutionPolicy Bypass -Command "irm https://gitee.com/juzcn/slife/raw/main/install.ps1 | iex"

Try without installing

uvx --from git+https://github.com/juzcn/slife.git slife

Update

Re-run the install script — it auto-preserves optional packages (llama-cpp-python, sentence-transformers) by diffing the previous venv and re-adding them.

Uninstall

# macOS / Linux / WSL
curl -fsSL https://raw.githubusercontent.com/juzcn/slife/main/uninstall.sh | bash
# China mainland
curl -fsSL https://gitee.com/juzcn/slife/raw/main/uninstall.sh | bash

# Windows PowerShell
powershell -ExecutionPolicy Bypass -Command "irm https://raw.githubusercontent.com/juzcn/slife/main/uninstall.ps1 | iex"
# China mainland
powershell -ExecutionPolicy Bypass -Command "irm https://gitee.com/juzcn/slife/raw/main/uninstall.ps1 | iex"

User data (~/.slife/, ~/.credstore/) is not removed — delete manually for a full reset.

Quick Start

credstore set-password              # first time — encrypted backup
credstore set DEEPSEEK_API_KEY      # store API key (masked input)
slife

To share the same API key across multiple providers:

credstore copy DEEPSEEK_API_KEY BAILIAN_API_KEY

Configuration

Secrets in the OS keyring, config in JSON5:

env: {
  DEEPSEEK_API_KEY: "${DEEPSEEK_API_KEY}",   // → resolved from keyring at runtime
}

models: {
  providers: {
    deepseek: {
      base_url: "https://api.deepseek.com",
      api_key: "${DEEPSEEK_API_KEY}",
      api: "openai-completions",
      models: [{ model: "deepseek-v4-pro", name: "DeepSeek V4 Pro", reasoning: true }],
    },
  },
},
active_model: "deepseek/deepseek-v4-pro",

${VAR:-default} fallback syntax is supported. Secrets can also be referenced as keyring:service/key URIs.

Three first-class API backends:

Switch at runtime: model_list → model_switch(ref="bailian/qwen3.8-max").

Secrets never reach the LLM. User input, tool-call arguments, and every tool result pass through a pattern-based sanitizer before entering the conversation — API key shapes (sk-*, ghp_*, Bearer tokens, …) are auto-masked.

Features

Tools

All unified as OpenAI function definitions. The LLM sees no difference between native, plugin, and external MCP tools.

52 native tools in 14 categories — auto-discovered from slife/tools/ (up to 50 LLM-visible + 2 harness; include_image is dropped when the active model has no vision, and install_python_package is disabled by default in the shipped config):

Every tool additionally accepts three harness meta-parameters: _timeout (per-call override), _async (run in background, poll with check_async), and _approve (inline approval prompt in the chat — Y approve / N deny / Esc deny).

Harness tools come in two tiers. _-prefixed native tools (_sys_note / _sys_trim) are LLM-visible but reserved: the agent loop auto-invokes them each turn to maintain context state (report usage %, trim old turns when over the ceiling); they are schema-declared (so the Anthropic / OpenAI-Responses backends accept their call pairs) but the system prompt forbids the LLM from calling them, and both are harmless if it does anyway. __-prefixed plugin tools (__memory_save_turn, __mcp_call_tool, …) are LLM-invisible — filtered out of the schema entirely and called programmatically via client.call_tool().

Five managed categories (Skills / CLI / REST API / Models / MCP) support X_list / X_set / X_remove (+ X_set_enabled where a toggle applies) — all X_set tools are idempotent upserts.

Plugin tools — registered at runtime as {server}__{tool} proxies:

Built-in plugin tools that already carry their server as a name prefix (mcp_set, wechat_login) are registered as-is; the rest are namespaced {server}__{tool}. External MCP servers configured in slife.json5 → mcp.servers always appear as {server}__{tool} (e.g. filesystem__read_file).

Windows execution. execute_shell runs in the detected shell — PowerShell or cmd (the same value the system prompt reports, so the LLM's syntax actually executes) — and its output is decoded with the system code page (GBK/cp936 on Chinese Windows). run_python_script forces the child Python to UTF-8 (-X utf8) so non-ASCII output can't crash the child.

Memory — Always On

Every conversation turn is permanently recorded in SQLite (~/.slife/<agent>.db). Hybrid search across four modes:

Memory is a core feature — the agent never runs silently without it. If the memory DB is broken (missing column, corruption, disk error), the agent fails loudly instead of pretending: a session that can't restore aborts at startup with the error; a turn that can't be saved freezes the inbox and shows a red banner — new turns stop until the DB is fixed and the agent is restarted. A memdb plugin that fails to load likewise aborts startup.

Embedding backends: local GGUF (BGE-M3, offline), HuggingFace transformers, or OpenAI-compatible API. Keyword search works without any embedding backend. Semantic (hybrid) results are only served once the index is fully built for the current model — while a full reindex runs (new/changed model, restart mid-index), hybrid degrades to keyword-only and resumes automatically when indexing finishes. A single SemanticManager owns the lifecycle (search gate, embedder, background index drainer): memory_set_embedding / memory_set_enabled(true) block until the model loads and the index starts building, and memory_check_embedding reports the live state (disabled / loading / indexing / ready / stalled) alongside the gate.

Each turn also records two timestamps — the user's input time (created_at, the Enter-press moment) and the assistant's completion time (completed_at) — shown as dim [HH:MM] markers in the chat (user messages and assistant responses respectively). Databases created before completed_at are migrated once with python scripts/migrate_memdb_completed_at.py (no in-plugin ALTER); fresh databases get the column automatically. Image attachments (images) use the same standalone-script pattern — python scripts/migrate_memdb_images.py for pre-existing databases.

Autonomous Heartbeat

While idle, the agent gets a periodic autonomous window (every agent.heartbeat_interval seconds, default 60) to think or act on its own. It runs as a normal turn (own conversation, saved to memory); the reply contract is real content if it has something worth saying, otherwise a single .. A bare . reply is silence — never rendered in the chat or session restore, from any event (heartbeat, A2A async-completion notification, etc.); the [Heartbeat] trigger is filtered, and a real autonomous reply renders as ⚡ 自主. A precondition for emergent self-initiated behavior.

Image & Vision

Attach images with @path / @url syntax (quotes supported for paths with spaces), displayed inline in the terminal:

Check this screenshot @D:\Downloads\error.png

Two-tier rendering: Sixel (full-colour on Windows Terminal / WezTerm / iTerm2 / Kitty) → HalfcellImage (coloured Unicode half-blocks on any true-colour terminal) → text placeholder. Vision-capable models receive local files as base64 data URIs and HTTP(S) URLs as-is; the include_image tool lets the agent attach images mid-conversation, and memfiles__expose_file publishes any local file as a public HTTPS link via the ngrok tunnel (returns a graceful error while the tunnel is offline).

Plugins

Five built-in plugins as independent child processes:

External MCP servers configured in slife.json5 → mcp.servers — any stdio, SSE, or Streamable HTTP MCP server works, no Slife SDK required. For url-configured servers, SSE is auto-detected and Streamable HTTP is the fallback; a Streamable response may arrive as a single JSON body or an SSE stream (both handled).

All plugins — built-in and auto-discovered third-party alike — run with a watchdog that auto-restarts them on crash (exponential backoff 1s→30s, max 5 restarts). The MCP wrapper watchdog also reconnects external servers after restart. Runtime health checks — check_memdb, check_wechat, check_memfiles, check_mcp, check_a2a, check_watchdog — monitor application-level state and are surfaced via system_health; the watchdog is purely process-level.

A2A — Agent-to-Agent (mesh)

The A2A protocol (JSON-RPC operations and Message/Task/AgentCard data shapes mirroring the official a2a-python reference interface) runs over a pluggable transport binding — currently MQTT. The a2a plugin hosts the LLM-visible tools and the A2AClient, and only starts when the broker is reachable:

• Mesh tools (one uniform a2a_ prefix): a2a_send_task, a2a_send_task_async, a2a_get_task_result, a2a_cancel_task, a2a_list_agents, a2a_list_tasks, a2a_agent_card, a2a_broadcast.
• Local workers are NOT A2A: spawn_subagent, list_subagents, stop_subagent, subagent_send_task, subagent_send_task_async, subagent_get_task_result, subagent_list_tasks, subagent_cancel_task. A worker runs one task at a time; a sync send to a busy worker is auto-queued as async (task_id returned) and reported.

A2A's only implemented transport binding is MQTT — setting transport to any other value disables A2A with a warning instead of crashing startup. All messages — human, WeChat, MQTT, subagent results — flow through a single inbox queue and are processed one turn at a time.

Keyboard Shortcuts

CLI

Optional Extras

Linux / macOS — builds from source:

uv tool install "slife[gguf]" --reinstall

Windows — pre-built wheels (no C++ compiler needed); uv is configured to use the llama-cpp-python CPU wheel index. See install docs for wheel selection and first-use instructions.

Development

git clone https://github.com/juzcn/slife.git
cd slife
uv sync --all-extras

uv run credstore set-password
uv run credstore set DEEPSEEK_API_KEY
uv run slife

# Tests
uv run pytest
uv run pytest --cov --cov-report=term-missing

Dev mode auto-detects when you run from the source tree: data files stay in the project directory. Production installs (uv tool / pipx / pip) always use ~/.slife/ — even when launched from inside a checkout or from the home directory. CI runs the test suite on Ubuntu, macOS, and Windows with Python 3.13.

Architecture

See DESIGN.md — philosophy, agent loop, tool system, plugin contract, MCP gateway, memory database, A2A mesh, credential security model, and full project structure.

License

MIT