The MCP server exposes a single research tool that mirrors the /last30days <topic> slash command available in Claude Code. At runtime the binary extracts the vendored Python engine into a per-user cache and shells out to python3 to produce the synthesis input Claude renders.

Architecture

cmd/last30days-pp-mcp/ - server entry point
internal/engine/ - embed.FS of the Python engine + cache extractor + subprocess wrapper
internal/tools/ - MCP tool handlers (currently research)
internal/engine/vendored/ - mirror of skills/last30days/scripts/, generated by scripts/sync-engine.sh (gitignored). Lives inside the engine package because //go:embed cannot reach files outside its own package directory.
manifest.json - MCPB v0.3 manifest consumed by Claude Desktop and printing-press bundle

Local build

# Mirror the Python engine into vendored/.
bash scripts/sync-engine.sh

# Build for the current host.
go build -ldflags "-X main.Version=dev" -o build/last30days-pp-mcp ./cmd/last30days-pp-mcp

# Package as a .mcpb (requires the printing-press binary on PATH).
printing-press bundle . --skip-build --binary build/last30days-pp-mcp

The output .mcpb lands at build/last30days-pp-mcp-<os>-<arch>.mcpb. Drag it into Claude Desktop's Extensions panel to install.

Runtime requirements

End users need Python 3.12+ on PATH. The bundle ships the engine source but relies on the host interpreter.

Versioning

The MCPB manifest.json version is hand-bumped in the same PR that ships engine changes worth releasing. Release CI stamps the Go binary's main.Version from the tag.