Bug

The MCP server (dist/mcp.js) fails to start with:

Error: Database path not set. Tests must set INDEX_PATH env var or use createStore() with explicit path.
This prevents tests from accidentally writing to the global index.

Root Cause

dist/store.js has a _productionMode flag (default false) that gates access to the default database path (~/.cache/qmd/index.sqlite). The CLI entrypoint (dist/qmd.js) calls enableProductionMode() at startup, but dist/mcp.js does not — so getDefaultDbPath() throws at line 334 instead of resolving the path.

Fix

One-line addition in mcp.js — import and call enableProductionMode() before createStore():

- import { createStore, extractSnippet, addLineNumbers, structuredSearch, DEFAULT_MULTI_GET_MAX_BYTES, } from "./store.js";
+ import { createStore, extractSnippet, addLineNumbers, structuredSearch, DEFAULT_MULTI_GET_MAX_BYTES, enableProductionMode, } from "./store.js";
+ enableProductionMode();

Environment

• qmd v0.1.0 (installed via Claude Code plugin system)
• Node.js on Linux (GitHub Codespace)
• CLI works fine (qmd search resolves the path correctly)
• MCP server crashes on every invocation

Workaround

Either:

1. Apply the patch above to dist/mcp.js in the plugin cache
2. Set INDEX_PATH=~/.cache/qmd/index.sqlite in the environment before the MCP server starts