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Baron Core

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Baron core: capability-port contracts, the semantic role layer, and adapter base classes.

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About

Baron core: capability-port contracts, the semantic role layer, and adapter base classes.

README

One pane of glass from backlog to deploy — for AI coding agents. Drive issues, branches, PRs, CI, deployments, and notifications across any stack through a single normalized contract, instead of hardwiring one vendor's API into your prompts.

Baron running the task-start then task-finish recipes through its normalized ports

The problem

AI coding agents bake one vendor's API and one team's process into prompts. The moment your issues live in Azure DevOps but your code is on GitHub, or your board columns aren't literally "To Do / Done", or you switch trackers next quarter — the prompts break, and the agent falls back to raw, vendor-specific tools. You've hardcoded vendor lock-in into the way you work.

What Baron does

Baron puts a normalized contract between the agent and your providers. The agent speaks one abstract vocabulary — work items, branches, PRs, CI runs, deployments, notifications, in terms of roles (backlog → ready → in_progress → in_review → done, plus blocked) — and Baron translates to each provider's real API, states, and quirks. Mix providers freely (Linear issues + GitHub PRs + Slack notifications). Same prompt, any stack.

What it looks like

You:  Start a task: add rate limiting to the login endpoint.

Baron  ▸ runs the task-start recipe as ONE deterministic call:
  ✓ Created STORE-142 "Add rate limiting to the login endpoint"  (type role: task)
  ✓ Branched feature/STORE-142 from the repo's default branch
  ✓ Moved STORE-142 → in_progress
  ✓ Commented: "Started on branch feature/STORE-142."

That same prompt on Azure DevOps sets the work item state to Active; on GitHub it applies an in-progress label — because in_progress is a role, not a vendor state. You confirmed that mapping once, at baron init. The agent never learns a vendor's column names, and the workflow's order is enforced by Baron's engine, not by the model improvising.

Why it's different

  • Capability ports, not "a tracker." issues / scm / ci / deploy / notify, each bound to a provider independently — so a consumer mixes providers rather than betting on one vendor spanning everything.
  • Normalize, don't raw-proxy. New capabilities become first-class normalized ports; a clearly labeled provider-native escape hatch is the explicit last resort, never the default path.
  • Capability gaps are never silent. When a provider lacks something (say, native issue hierarchy), Baron either emulates it (e.g. labels), degrades with a warning, or errors loudly — decided by policy, never swallowed.
  • Workflows are deterministic recipes. Multi-step flows (task-start, task-finish, ship) are declarative YAML run as one rule-enforced call — the engine enforces step order, the agent doesn't.

Quick start

Baron runs from source today (no build step needed — workspace packages resolve to TypeScript source):

pnpm install

# 1. Configure: introspect a provider and write .baron/policy.json (you confirm the role mapping)
pnpm baron init --provider azure-devops      # or: --provider github

# 2. Add credentials (env or .baron/credentials — never committed). For Azure DevOps:
#    AZURE_DEVOPS_ORG, AZURE_DEVOPS_PROJECT, AZURE_DEVOPS_REPO, AZURE_DEVOPS_TOKEN

# 3. Check the policy against the live provider
pnpm baron doctor

# 4. Run a workflow recipe
pnpm baron run --recipe packages/recipes/recipes/task-start.yaml

Or wire the MCP server into your agent and call the tools directly across every port — baron_issue_create, baron_scm_pr_create, baron_ci_runs, baron_deploy_deployments, baron_notify_send, plus baron_recipe_run for whole workflows. In Claude Code, the plugin also ships per-recipe skills (/baron:task-start, /baron:ship). See docs/mcp.md.

New to it? The Azure DevOps setup walkthrough is copy-paste from scratch (PAT scopes, init → doctor → MCP, troubleshooting).

Providers

Provider Ports
Azure DevOps issues · scm · ci · deploy
GitHub issues · scm · ci · deploy
Slack notify

More adapters (Jira, Linear, GitLab, Notion) are on the roadmap — the whole point is that adding one never changes how the agent talks to Baron.

Documentation

Guide What it covers
Getting started Install, prerequisites, first initdoctorrun.
Setup walkthrough — Azure DevOps From-scratch, copy-paste setup on Azure DevOps + Claude Code.
Concepts Ports, roles, capability gaps, the knowledge loop — the mental model.
Configuration .baron/policy.json, role/type/gap maps, credentials.
CLI baron init / doctor / run reference.
Recipes Writing YAML recipes: ask / do / message, interpolation, the op table.
MCP server & plugin The MCP tools and the Claude Code plugin.
Trying it with Claude Code Hands-on: wire the MCP server to a real project + a verification checklist.
Providers Which provider supports which port and capability.
Demo script Ready-to-record 60-second "single pane" demo (Claude Code or CLI).

The full design decision record is in ARCHITECTURE.md; the contributor working contract is CLAUDE.md, contribution terms are in CONTRIBUTING.md, and the publish playbook is RELEASING.md.

Status

v1 is built end-to-end: the issues, scm, ci, and deploy ports across Azure DevOps and GitHub plus notify via Slack, the config engine (baron init / doctor), a multi-port MCP server, the YAML recipe engine + baron run, the knowledge loop, and a Claude Code plugin. Every adapter passes a network-free conformance suite; the Azure DevOps ports are additionally live-validated against a real project. GitHub/Slack live validation is next.

License

Open-core. The core, the P0 adapters (Azure DevOps, GitHub, Slack), the recipes, and the CLI/MCP server are licensed under Apache-2.0. Future commercial-tier features (SSO, secret-manager integrations, multi-team governance, audit) will ship under a separate commercial license — see ARCHITECTURE.md decision #20.

from github.com/loncadev/baron

Install Baron Core in Claude Desktop, Claude Code & Cursor

Recommended · one command, every IDE
unyly install baron-core

Installs into Claude Desktop, Claude Code, Cursor & VS Code — handles npx, uvx and build-from-source repos for you.

First time? Get the CLI: curl -fsSL https://unyly.org/install | sh

Or configure manually

Run in your terminal:

claude mcp add baron-core -- npx -y @lonca/baron-core

FAQ

Is Baron Core MCP free?

Yes, Baron Core MCP is free — one-click install via Unyly at no cost.

Does Baron Core need an API key?

No, Baron Core runs without API keys or environment variables.

Is Baron Core hosted or self-hosted?

Self-hosted: the server runs locally on your machine via the install command above.

How do I install Baron Core in Claude Desktop, Claude Code or Cursor?

Open Baron Core on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.

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