Files
last30days-skill/mcp/cmd/last30days-pp-mcp/main.go
T
Matt Van Horn 35f12cb9ea feat(mcp): stdio MCP server with research tool
U3 of the Claude Desktop .mcpb bundle plan.

- internal/engine/run.go invokes python3 with the cached last30days.py,
  forwards os.Environ() so MCPB user_config env-injection reaches the
  engine, sets PYTHONPATH so the lib/ imports resolve, and surfaces
  three distinct error shapes (missing interpreter with install URL,
  non-zero exit with stderr, timeout). RunOptions.PythonPath lets tests
  inject a stub without manipulating PATH.
- internal/engine/run_test.go drives a shell-script stub interpreter
  through happy path, env forwarding, PYTHONPATH, non-zero exit with
  stderr surfacing, timeout, missing python3 (empty PATH), missing
  last30days.py, empty CacheDir, and timeout-env-override parsing.
- internal/tools/research.go registers a single research tool whose
  schema mirrors /last30days <topic> (required topic, optional emit
  enum, optional save bool). Validation failures surface as MCP
  tool errors so Claude sees structured failures instead of transport
  faults; engine extract or run errors fold engine stderr into the
  message so users can diagnose without leaving Desktop.
- internal/tools/research_test.go covers requireString, emitArgument,
  boolArgument, handler-level validation routing, and formatRunError.
- cmd/last30days-pp-mcp/main.go wires NewMCPServer + tools.Register +
  ServeStdio. main.Version is ldflags-stamped at build time and
  namespaces the per-user cache. mcp-go pinned at v0.54.0.

Smoke check: ./build/last30days-pp-mcp answers tools/list with the
research tool plus full schema and read-only/open-world annotations.
go test ./... passes across engine + tools (32 cases).
2026-05-17 20:51:00 -07:00

40 lines
984 B
Go

// Package main is the entry point for the last30days MCP server bundled
// as a .mcpb for Claude Desktop. The server registers a single research
// tool (see internal/tools) and serves it over stdio. See mcp/README.md
// for build and packaging instructions.
package main
import (
"fmt"
"os"
"github.com/mark3labs/mcp-go/server"
"github.com/mvanhorn/last30days-skill/mcp/internal/tools"
)
// Version is stamped at build time via -ldflags "-X main.Version=<tag>".
// It namespaces the per-user cache directory in internal/engine so multiple
// installed versions can coexist without clobbering each other.
var Version = "dev"
const (
serverName = "last30days"
serverVersion = "1"
)
func main() {
s := server.NewMCPServer(
serverName,
serverVersion,
server.WithToolCapabilities(false),
)
tools.Register(s, tools.Config{Version: Version})
if err := server.ServeStdio(s); err != nil {
fmt.Fprintf(os.Stderr, "last30days-pp-mcp: %v\n", err)
os.Exit(1)
}
}