feat: auto detect hostname

README.md

@@ -87,12 +87,12 @@ fgj pr view 123          # Automatically uses current repo
 fgj pr list -R owner/repo
 ```
 
-The tool reads `.git/config` to find the origin remote and extract the owner/repo information. If you're not in a git repository, you'll need to use the `-R` flag.
+The tool reads `.git/config` to find the origin remote and extract both the owner/repo information and the Forgejo instance hostname. If you're not in a git repository, you'll need to use the `-R` flag.
 
 ### Pull Requests
 
 ```bash
-# List pull requests (auto-detects repo from git)
+# List pull requests (auto-detects repo and hostname from git)
 fgj pr list
 
 # Or specify explicitly
@@ -114,7 +114,7 @@ fgj pr merge 123 --merge-method squash
 ### Issues
 
 ```bash
-# List issues (auto-detects repo from git)
+# List issues (auto-detects repo and hostname from git)
 fgj issue list
 
 # Or specify explicitly
@@ -237,14 +237,22 @@ hosts:
 
 ### Environment Variables
 
-- `FGJ_HOST`: Override the default Forgejo instance
+- `FGJ_HOST`: Override the default Forgejo instance (auto-detected from git remote if not set)
 - `FGJ_TOKEN`: Provide authentication token
 
+Hostname is resolved in this priority order:
+1. Command-specific flags (e.g., `--hostname`)
+2. `FGJ_HOST` environment variable
+3. Auto-detected from git remote URL
+4. Default to `codeberg.org`
+
 ### Command-line Flags
 
-- `--hostname`: Specify Forgejo instance for a command
+- `--hostname`: Specify Forgejo instance for a command (overrides auto-detection and environment variables)
 - `--config`: Use a custom config file
 
+When working in a git repository, `fgj` automatically detects the Forgejo instance from your origin remote URL, so you typically don't need to specify `--hostname` unless working with multiple instances.
+
 ## Use with AI Coding Agents
 
 `fgj` is designed to work seamlessly with AI coding agents like Claude Code. Common patterns: