Reasonix is an MIT-licensed open-source coding agent that runs on your machine, with a DeepSeek preset and support for any OpenAI-compatible model. HagiCode is a workbench that runs Reasonix through its ACP mode and adds sessions, proposals and commit tooling.
Reasonix is an open-source coding agent that reads your project, edits files and runs commands and tests, with permission levels and rewind built in. You pick the model: DeepSeek ships as a preset and any OpenAI-compatible service is a config entry. HagiCode is a workbench that starts Reasonix as an executor and wraps it with parallel sessions, spec proposals, commits and history. It does not replace Reasonix and it does not provide models.
If you mainly want a terminal, desktop or editor agent with a cheap model and your own simple workflow, stay with Reasonix alone. Add HagiCode when you run several tasks at once or want each change to start from a written proposal.
| Aspect | Reasonix | HagiCode |
|---|---|---|
| What it is | Open-source coding agent: reads code, edits files, runs commands and tests in your project folder | AI programming workbench that runs agent CLIs, including Reasonix, as executors |
| Interface and platforms | Terminal UI, Studio desktop app, browser (reasonix web), VS Code, other editors over ACP; macOS, Linux, Windows | Desktop app (Windows, macOS, Linux), Docker Compose container, Microsoft Store edition |
| Pricing and licensing | MIT-licensed and free; you pay the model provider directly | Desktop and Container editions free; Store edition free base, optional one-time TurboEngine purchase |
| Model and provider access | DeepSeek preset; any OpenAI-compatible endpoint is a config entry; optional executor plus planner model | Hosts no models; uses the providers in your Reasonix config, or OmniRoute if you configure it |
| Parallel work | Subagent profiles within a session | Several sessions side by side, managed as named Agents |
| Spec and planning workflow | Plan mode: work starts only after you approve the plan | OpenSpec proposals: propose, validate, apply, archive |
| Git and commit handling | Per-turn file checkpoints let you rewind edits without touching git history | AI-written commit messages with repository locking; Git management in the UI |
| Asking you questions | Built-in ask tool with options | Shows each question in the conversation; one option per question, then continues the run |
| Setup effort | npm i -g reasonix or a desktop download, then reasonix setup to pick a model | Install Reasonix first, then HagiCode, then pick Reasonix as the Agent CLI |
| Best for | Developers who want a config-driven agent on a low-cost model, in terminal, desktop or editor | Running several Reasonix tasks across repos with specs, review and history in one place |
Providers, the agent, enabled tools and plugins are all declared in reasonix.toml. DeepSeek is a built-in preset, and any OpenAI-compatible endpoint is added as configuration rather than code.
You can optionally run an executor model and a planner model together, each in its own cache-stable session.
Permission levels let you have it ask every time or let everyday actions run on their own, and your forbid rules always hold. Plan mode starts work only once you approve.
A file is saved before it changes, so you can rewind by conversation turn without touching git history. Only files changed by its edit tools are covered, not what a shell command did.
Startup injects a small, stable environment summary, and stale tool output is trimmed before summary compaction. The project describes this as cache-aware, which matters on providers that discount cached prompt prefixes.
Terminal, the Studio desktop app, a browser UI started with reasonix web, or an editor over ACP all run the same local engine. MCP servers and Extension Protocol sidecars add tools, prompts and events.
Reasonix ships on two lines: 2.x (Studio, in active development) and 1.x (stable, maintenance). Check which one you install.
HagiCode does not bundle or replace Reasonix. It finds the reasonix executable, checks its version, and starts it in ACP mode for each run, so your install, provider keys and reasonix.toml stay as they are.
Model choice goes through the references defined in your Reasonix configuration; an undefined model fails the turn with a clear error instead of silently falling back.
Every Reasonix run in HagiCode is its own session, so one can handle a bug while another builds a feature. Agents management shows the status of each, instead of several terminals.
Reasonix's plan mode approves a plan inside one session. HagiCode's propose, validate, apply, archive flow keeps that plan as a durable record. Free editions allow 3 concurrent proposals.
HagiCode writes the commit message from your diff and locks the repository while it commits. The embedded Code Server opens files Reasonix changed in a browser editor.
Monospecs lists your repositories in one file so Reasonix starts a proposal knowing the whole change surface. Vault keeps reference projects and notes that new proposals can use as context.
Reasonix already takes any OpenAI-compatible endpoint, so OmniRoute fits as one more route you can select. Reasonix's tool calls use the same format as other agents, and an optional TokenMonitor status-bar item shows today's tokens and cost.
When Reasonix asks a question, HagiCode shows it in the conversation, the session waits for a reply, and your answer continues the same run. Each question takes one of the options Reasonix offered, and each answer is stored with the session.
HagiCode is an agentic coding workspace. Rich, convenient UI interactions make planning, agent execution, and project work approachable and easy to navigate, creating an engaging development experience.
Explore an engaging development experience through rich, convenient UI interactions.
HagiCode is an agentic coding workspace. OpenSpec workflows plan the change, multi-agent execution carries it out, and Hero Scenario makes the long run visible, so ideas become shipped software.
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