qmd

QMD — Vault Semantic Search

Before reading vault files directly, search with QMD first. It returns relevant snippets without burning context on full file reads.

Tool Surfaces — Preference Order

Pick the highest surface available and stop. All three read the same SQLite store (scoped by qmd_index in vault-manifest.json), so they return the same results; the choice is about interface ergonomics and context cost.

1. MCP tools (preferred when registered) — mcp__qmd__query, mcp__qmd__get, mcp__qmd__multi_get, mcp__qmd__status. If these appear in your tool menu, the MCP server is live and pre-scoped to this vault. Call them directly — no --index argument needed, no shell involved, typed arguments. This is the intended path during a session.
2. CLI fallback — qmd --index <name> query|search|vsearch|get|multi-get. Use when the MCP server isn't registered (older vault clones, Windows install drift, disabled in .mcp.json), or for one-off shell checks outside a session. Always pass --index <name>.
3. Grep / Glob / Read — last resort, only when QMD is not installed at all. These burn context on full file reads and don't rank by relevance.

Never fall through surfaces without cause — if MCP is registered, calling the CLI in a Bash tool is just a slower path to the same result.

Named Index (This Vault)

This vault declares a named QMD index in vault-manifest.json under qmd_index. Every QMD command in this document uses --index <name> so queries, updates, and context strings stay scoped to this vault — not blended with any other vault that shares the machine.

The MCP server (.mcp.json) and the SessionStart hook read the same field, so all three surfaces (CLI, MCP, hook) point at the same SQLite store.

Read the index name from the manifest before running commands. This snippet prints a clear error when the field is missing instead of silently running qmd --index undefined:

INDEX=$(node -e '
  const m = JSON.parse(require("fs").readFileSync("vault-manifest.json", "utf8"));
  if (!m.qmd_index) { process.stderr.write("qmd_index not set in vault-manifest.json\n"); process.exit(1); }
  process.stdout.write(m.qmd_index);
') || exit 1
qmd --index "$INDEX" query "..."

In-session, substitute the value of qmd_index directly in your commands (the index name is stable across the vault's lifetime). The default in a fresh template is obsidian-mind.

Commands

Each operation lists the MCP call first, then the CLI equivalent. Prefer MCP when available.

Search (pick one per query)

• Hybrid (best quality) — mcp__qmd__query with searches=[{type:"lex", query:"..."}, {type:"vec", query:"..."}] and an intent arg. CLI: qmd --index <name> query "..." --json -n 10. Use for complex or conceptual queries.
• Keyword (fast BM25) — mcp__qmd__query with searches=[{type:"lex", query:"..."}]. CLI: qmd --index <name> search "..." --json -n 10. Use for exact terms, names, ticket numbers, dates.
• Semantic only — mcp__qmd__query with searches=[{type:"vec", query:"..."}]. CLI: qmd --index <name> vsearch "..." --json -n 5. Use for exploratory queries where you don't know the exact words.

Retrieve

• By path — mcp__qmd__get with path arg. CLI: qmd --index <name> get "path/to/file.md".
• By docid — mcp__qmd__get with #abc123 syntax. CLI: qmd --index <name> get "#docid".
• Batch by glob — mcp__qmd__multi_get with pattern arg. CLI: qmd --index <name> multi-get "org/people/*.md" --json -l 40.

Index Management (CLI only — MCP exposes read surfaces)

• qmd --index <name> update — Re-index after file changes (fast, ~1-2s incremental). The SessionStart hook and the PostToolUse debounced refresh both run this automatically; manual invocation is rarely needed.
• qmd --index <name> embed — Regenerate vector embeddings (slower, run after bulk changes).

Bootstrap (Fresh Clone)

The QMD SQLite store lives outside the repo (~/.cache/qmd/<index>.sqlite), so a fresh clone starts with no index. Run the bootstrap once:

node --experimental-strip-types scripts/qmd-bootstrap.ts

It reads qmd_index and qmd_context from vault-manifest.json, registers the collection, attaches the vault context, walks the vault, and generates embeddings. Idempotent — safe to re-run.

When to Search

Each case lists the preferred MCP call; fall back to the CLI equivalent if MCP isn't registered.

• User mentions a past decision, incident, person, project → mcp__qmd__query (hybrid).
• User asks "what did we decide about X" → mcp__qmd__query (hybrid with intent describing the decision context).
• User mentions a person by name → mcp__qmd__query with searches=[{type:"lex", query:"<name>"}].
• Before creating a new note → mcp__qmd__query with searches=[{type:"vec", query:"<topic>"}] to check for existing content.
• After creating a note → mcp__qmd__query with searches=[{type:"vec", query:"<note title>"}] to find notes that should link to it.
• Loading context for review prep → mcp__qmd__multi_get with pattern="perf/evidence/*.md".
• Loading 1-on-1 context → mcp__qmd__query with searches=[{type:"lex", query:"<person name> 1-1"}].

After Bulk Changes

Run qmd --index <name> update && qmd --index <name> embed in the shell. The SessionStart hook and the PostToolUse debounced refresh run update automatically, but embed should be run explicitly after sessions that create many notes.