Publishes detailed workplans as GitHub issues using whole-codebase reasoning, and reviews diffs against those plans.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add yellhorn --env GEMINI_API_KEY='<GEMINI_API_KEY>' --env YELLHORN_MCP_SEARCH='<YELLHORN_MCP_SEARCH>' -- uv sync --group dev~/.codex/config.toml
[mcp_servers.yellhorn]
command = "uv"
args = ["sync", "--group", "dev"]
env = { GEMINI_API_KEY = "<GEMINI_API_KEY>", YELLHORN_MCP_SEARCH = "<YELLHORN_MCP_SEARCH>" }
# codex mcp add yellhorn --env GEMINI_API_KEY='<GEMINI_API_KEY>' --env YELLHORN_MCP_SEARCH='<YELLHORN_MCP_SEARCH>' -- uv sync --group dev~/.cursor/mcp.json
{
"mcpServers": {
"yellhorn": {
"command": "uv",
"args": [
"sync",
"--group",
"dev"
],
"env": {
"GEMINI_API_KEY": "<GEMINI_API_KEY>",
"YELLHORN_MCP_SEARCH": "<YELLHORN_MCP_SEARCH>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"yellhorn": {
"type": "stdio",
"command": "uv",
"args": [
"sync",
"--group",
"dev"
],
"env": {
"GEMINI_API_KEY": "<GEMINI_API_KEY>",
"YELLHORN_MCP_SEARCH": "<YELLHORN_MCP_SEARCH>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"yellhorn": {
"command": "uv",
"args": [
"sync",
"--group",
"dev"
],
"env": {
"GEMINI_API_KEY": "<GEMINI_API_KEY>",
"YELLHORN_MCP_SEARCH": "<YELLHORN_MCP_SEARCH>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"yellhorn": {
"command": "uv",
"args": [
"sync",
"--group",
"dev"
],
"env": {
"GEMINI_API_KEY": "<GEMINI_API_KEY>",
"YELLHORN_MCP_SEARCH": "<YELLHORN_MCP_SEARCH>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"yellhorn": {
"command": "uv",
"args": [
"sync",
"--group",
"dev"
],
"env": {
"GEMINI_API_KEY": "<GEMINI_API_KEY>",
"YELLHORN_MCP_SEARCH": "<YELLHORN_MCP_SEARCH>"
}
}
}
}Environment variables
GEMINI_API_KEYYELLHORN_MCP_SEARCH
Replace the placeholders with your own credentials and keep them out of version control.