diff --git a/README.md b/README.md
index 64f9d3b..c7c1361 100644
--- a/README.md
+++ b/README.md
@@ -10,10 +10,10 @@ Whether your test outputs format, Utsukushii helps you present your results with
 
 ## 🚀 Features
 
+- **Dev mode**: Run test from UI !
 - **JUnit Format Support**: Convert JUnit outputs into a unified, beautiful report.
 - **Dotnet trx logger Support**: Convert dotnet trx logger report into a unified, beautiful report.
 - **Go-Test Format Support**: Convert Go test outputs into a unified, beautiful report.
-- **Dev modes**: Run tests and look at their result in 1 command
 - **Merge reports**: Union multiple reports into single.
 
 ## 📥 Installation
@@ -26,24 +26,36 @@ go install github.com/yurvon-screamo/utsukushii@latest
 
 ## 📚 Usage
 
-### Golang dev
+### Dev mode
 
-Run test, gen content and serve:
+![dev_mode](dev_mode.png)
 
-```bash
-go test -v --json ./... | utsukushii go-dev
-```
+1) Create config file `utsukushii-dev.yaml`:
 
-### Dotnet dev
+   ```yaml
+   # Required part
+   # The command to run the tests 
+   cmd: go test -v --json ./...
+   # Your solution language, oneof - 'go', '.net' 
+   lang: go
 
-Run test, gen content and serve:
+   # Optional part
+   # title: my report title
+   # coverage: 46
+   # addr: ':8080'
+   # ignore_open: true
+   ```
 
-```bash
-dotnet test --logger trx | utsukushii dotnet-dev
-```
+2) Start it:
+
+   ```bash
+   utsukushii dev
+   ```
 
 ### Generate and Serve Reports
 
+![gen_serve](gen_serve.png)
+
 1. **Generate Content**:
 
    ```bash
@@ -56,6 +68,12 @@ dotnet test --logger trx | utsukushii dotnet-dev
    utsukushii serve --content my-utsukushii.json
    ```
 
+Support:
+
+- go test json
+- dotnet test trx
+- junit reports
+
 By default, the report is served at `http://localhost:8080`.
 
 ## 🛠️ Development and Design Goals
diff --git a/dev_mode.png b/dev_mode.png
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diff --git a/gen_serve.png b/gen_serve.png
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diff --git a/utsukushii-dev.yaml b/utsukushii-dev.yaml
index 18b7962..b3f7a21 100644
--- a/utsukushii-dev.yaml
+++ b/utsukushii-dev.yaml
@@ -1,2 +1,11 @@
+# Required part
+# The command to run the tests 
 cmd: go test -v --json ./...
+# Your solution language, oneof - 'go', '.net' 
 lang: go
+
+# Optional part
+# title: my report title
+# coverage: 46
+# addr: ':8080'
+# ignore_open: true