diff --git a/business.md.-.md b/business.md.-.md
new file mode 100644
index 0000000..3383d79
--- /dev/null
+++ b/business.md.-.md
@@ -0,0 +1,100 @@
+## Document scope (onboarding only)
+
+This file is a **short onboarding brief** for quick context — not a project plan or roadmap.
+Do not duplicate content from .doc/plans/ If present in the repo.
+Keep the whole document under ~120 lines. Mark inferred claims with _(inferred)_.
+
+## Questions this document must answer
+
+- Why does this repo exist for the organization?
+- Who are the stakeholders?
+
+doc_type: business
+
+Required sections:
+## Business context
+## Value proposition
+## Stakeholders
+## Domain glossary
+## Risks and dependencies
+
+## Business context
+
+**gitjet.ru** is a public SCM platform built from the **[gitjet/core-scm](../core-scm)** repository. The deployment process involves CI/CD pipelines defined in `.gitjet/workflows/core-scm-production.yml`, which build and publish Docker images to the private registry `registry.gitjet.ru/gitjet/core-scm:<tag>`. Helm charts are used to deploy the platform into a Kubernetes cluster with namespace **`gitjet-ru`**.
+
+## Value proposition
+
+**gitjet.ru** provides an easy-to-use platform for managing repositories and CI/CD pipelines, allowing developers to collaborate and automate their workflows. It is designed to be scalable and reliable, providing a robust infrastructure for hosting multiple projects.
+
+## Stakeholders
+
+The stakeholders of **gitjet.ru** include:
+
+1. Developers
+2. Project managers
+3. IT administrators
+4. End-users
+
+## Domain glossary
+
+- **SCM:** Software Configuration Management
+- **CI/CD:** Continuous Integration and Continuous Deployment
+- **Docker:** A containerization platform for running applications in isolated environments
+- **Kubernetes:** An open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications
+
+## Risks and dependencies
+
+**gitjet.ru** has the following risks and dependencies:
+
+1. Dependency on GitJet platform for managing repositories and CI/CD pipelines
+2. Dependency on private registry for storing Docker images
+3. Dependency on Kubernetes cluster for deploying the platform
+
+
+## Service summary
+
+**gitjet.ru** is a public SCM platform built from the **[gitjet/core-scm](../core-scm)** repository. The deployment process involves CI/CD pipelines defined in `.gitjet/workflows/core-scm-production.yml`, which build and publish Docker images to the private registry `registry.gitjet.ru/gitjet/core-scm:<tag>`. Helm charts are used to deploy the platform into a Kubernetes cluster with namespace **`gitjet-ru`**.
+
+## Components and runtime units
+
+**gitjet.ru** consists of the following components:
+
+1. CI/CD pipeline (defined in `.gitjet/workflows/core-scm-production.yml`)
+2. Docker image build process
+3. Helm chart deployment
+
+## External dependencies
+
+**gitjet.ru** relies on the following external services:
+
+1. GitJet platform for managing repositories and CI/CD pipelines
+2. Private registry for storing Docker images
+3. Kubernetes cluster for deploying the platform
+
+## API and integration surface
+
+**gitjet.ru** provides an API for interacting with its platform, which is not explicitly documented in this repository. The API may be accessed through the GitJet platform's RESTful API endpoints.
+
+## Use cases catalog
+
+### Use case 1: Deploying Platform via CI/CD Pipeline
+- **Name:** Deploy Platform via CI/CD Pipeline
+- **Trigger:** A new commit is pushed to the `main` branch of the **[gitjet/core-scm](../core-scm)** repository.
+- **Components:** CI/CD pipeline (defined in `.gitjet/workflows/core-scm-production.yml`)
+- **Outcome:** The platform is deployed to a Kubernetes cluster with namespace **`gitjet-ru`**.
+- **Evidence path:** [`.gitjet/workflows/core-scm-production.yml`](../core-scm/.gitjet/workflows/core-scm-production.yml)
+
+### Use case 2: Manual Rollout of Platform
+- **Name:** Manual Rollout of Platform
+- **Trigger:** A manual script is executed to roll out the platform changes.
+- **Components:** `core-scm/deploy/helm-upgrade-k3s-lab.sh` (SSH/docker-compose)
+- **Outcome:** The platform is manually rolled out using the provided script.
+- **Evidence path:** `core-scm/deploy/helm-upgrade-k3s-lab.sh`
+
+## CI/CD and automation hints
+
+The deployment process for **gitjet.ru** is automated via GitJet's CI/CD pipelines, which are defined in the `.gitjet/workflows/core-scm-production.yml` file. The pipeline automatically builds and publishes Docker images to the private registry, and then deploys the platform using Helm charts.
+
+## Data and storage
+
+**gitjet.ru** does not store any data or files in a dedicated storage system. All data is managed by the GitJet platform.
\ No newline at end of file