Vault Ask

Vault Ask

Synthesizes a reasoned answer to the user's question by searching session and insight notes in the Obsidian vault and citing sources. Returns a grounded answer, not a list of matches.

Tools needed: Grep, Read, Bash

Procedure

Follow these steps exactly. Do not skip steps or reorder them.

Step 1 — Load config

Run:

cd "$(git rev-parse --show-toplevel 2>/dev/null || pwd)"
python3 -c '
import sys, os
import glob; sys.path.insert(0, max(glob.glob(os.path.expanduser("~/.claude/plugins/cache/*/obsidian-brain/*/hooks")), default="hooks"))
from obsidian_utils import load_config
c = load_config()
if not c.get("vault_path"):
    print("ERROR: vault_path not configured", file=sys.stderr)
    sys.exit(1)
project = os.path.basename(os.getcwd()).lower().replace(" ", "-")
print("VAULT=" + c["vault_path"])
print("SESS=" + c.get("sessions_folder", "claude-sessions"))
print("INS=" + c.get("insights_folder", "claude-insights"))
print("PROJECT=" + project)
'

Parse each output line as KEY=VALUE, splitting on the first =.

If the command exits non-zero or prints ERROR, tell the user:

Config not found. Run /obsidian-setup first to configure your Obsidian vault.

Stop here if config is missing.

Construct the two search directories:

• SESSIONS_DIR = <vault_path>/<sessions_folder>
• INSIGHTS_DIR = <vault_path>/<insights_folder>

Validate vault access:

test -d "$SESSIONS_DIR" && test -d "$INSIGHTS_DIR" && echo "OK" || echo "FAIL"

If FAIL, tell the user:

The vault folders do not exist or are not accessible. Run /obsidian-setup to fix this.

Stop here if FAIL.

Step 2 — Parse the question

The user provides a question after /vault-ask. Extract 3–6 key search terms from it:

• Technology names — e.g. Redis, GraphQL, JWT, Postgres
• Concept keywords — e.g. error handling, rate limiting, caching
• Action words indicating note types — e.g. decided → look for decision notes, fixed → look for error-fix notes

Store the extracted terms as SEARCH_TERMS. Keep the original question for use in Step 7.

Step 3 — FTS pre-filter (fast path)

Before spawning search agents, try the vault index for instant results. Join SEARCH_TERMS into a single space-separated string (SEARCH_TERMS_JOINED). Then run:

python3 -c '
import sys, os, json, glob
sys.path.insert(0, max(glob.glob(os.path.expanduser("~/.claude/plugins/cache/*/obsidian-brain/*/hooks")), default="hooks"))
from obsidian_utils import load_config
from vault_index import ensure_index, search_vault
c = load_config()
db = ensure_index(c["vault_path"], [c.get("sessions_folder", "claude-sessions"), c.get("insights_folder", "claude-insights")])
results = search_vault(
    db,
    sys.argv[1],
    project=sys.argv[2] if len(sys.argv) > 2 and sys.argv[2] != "None" else None,
    limit=15,
)
print(json.dumps(results))
' "$SEARCH_TERMS_JOINED" "$PROJECT"

If the output is a non-empty JSON array with 5+ results: extract the path field from each result and use those file paths as CANDIDATE_FILES. Skip Step 4 entirely and proceed directly to Step 5.

If fewer than 5 results or the command fails (non-zero exit, invalid JSON, import error): fall through to Step 4 to cast a wider net with parallel Grep agents.

Step 4 — Search vault (3 parallel agents)

Launch three Grep searches in parallel — one per agent below. Use the Grep tool (never Bash grep).

Agent 1 — Session content: For each term in SEARCH_TERMS, run:

Grep(pattern="<term>", path=SESSIONS_DIR, glob="*.md", output_mode="files_with_matches", -i=true)

Collect the union of all file paths returned.

Agent 2 — Insight content: For each term in SEARCH_TERMS, run:

Grep(pattern="<term>", path=INSIGHTS_DIR, glob="*.md", output_mode="files_with_matches", -i=true)

Collect the union of all file paths returned.

Agent 3 — Tag search (both folders): For each term in SEARCH_TERMS, run two Grep calls:

Grep(pattern="claude/topic/.*<term>", path=SESSIONS_DIR, glob="*.md", output_mode="files_with_matches", -i=true)
Grep(pattern="claude/topic/.*<term>", path=INSIGHTS_DIR, glob="*.md", output_mode="files_with_matches", -i=true)

Collect all file paths returned.

Combine results from all three agents. Deduplicate by file path. Store as CANDIDATE_FILES.

If CANDIDATE_FILES is empty, tell the user:

No vault notes found matching your question. Try /vault-search with individual keywords to explore what's available.

Stop here.

Step 5 — Rank results

Score each file in CANDIDATE_FILES using these rules:

To determine note type and date without reading the full file, run:

Read(file_path="<path>", limit=40)

to get frontmatter fields (type:, date:). Use 40 lines because some notes (e.g., standups with large source_notes arrays) have frontmatter exceeding 20 lines. If type: or date: is not found within the first 40 lines, read the full frontmatter.

Sort CANDIDATE_FILES by score descending. Take the top 10. Store as RANKED_FILES.

Step 6 — Read top notes (context shield)

Read the top 5–10 files from RANKED_FILES. Apply the following size-based strategy:

• Files under ~100 lines: Read directly with the Read tool.
• Files over ~100 lines: Use the /context-shield skill (parallel, one sub-agent per file). Each sub-agent reads the file in isolation and returns a distilled summary relevant to the question.

For each file, extract:

• Note type (session, insight, decision, error-fix, snapshot)
• Date
• Key content relevant to the question — decisions made, patterns observed, errors and fixes
• Exact filename (without path) for use as a wikilink citation

Snapshot-aware reading. If a ranked file has type: claude-snapshot, also resolve its parent session via the source_session_note frontmatter wikilink and include the parent session body in the synthesis pool — the snapshot alone only captures a mid-session fragment. If a ranked file has type: claude-session and has associated snapshots, fetch those snapshot summaries via the shared helper and include them alongside the session body:

python3 -c '
import sys, os, json, glob
sys.path.insert(0, max(glob.glob(os.path.expanduser("~/.claude/plugins/cache/*/obsidian-brain/*/hooks")), default="hooks"))
from pathlib import Path
from obsidian_utils import fetch_snapshot_summaries
snaps = fetch_snapshot_summaries(Path(sys.argv[1]), sys.argv[2], sys.argv[3], sys.argv[4])
print(json.dumps([{"hhmmss": s["hhmmss"], "trigger": s["trigger"], "summary": s["summary"]} for s in snaps]))
' "$SESSIONS_DIR" "$SESSION_ID" "$DATE" "$PROJECT"

The goal is that an answer synthesized from a session hit reflects the full session arc (pre-compact + post-compact), not only the tail transcript.

Store all extracted content as NOTE_SUMMARIES.

Step 7 — Synthesize answer

Using NOTE_SUMMARIES, synthesize a comprehensive answer to the user's question. Follow these rules strictly:

1. Lead with the answer, not the methodology. Do not begin with "I searched your vault..." — begin with the actual answer.

2. Cite sources inline using wikilinks. Reference the note filename (without extension) as a wikilink:

   "You chose Redis over Memcached ([[2026-04-04-use-redis-a3f2-decision]]) because TTL-per-key was required for token expiry."

3. Distinguish certainty levels based on the evidence:

   • "You explicitly decided..." — use when a decision note clearly records the choice
   • "Based on your sessions, it appears..." — use when the pattern is inferred from session content
   • "Limited context available..." — use when only one or two notes weakly touch the topic

4. End with a Sources section:

   ### Sources
   - [[note-filename-1]] — <what this note contributed to the answer>
   - [[note-filename-2]] — <what this note contributed to the answer>
   

5. Cite snapshot parents. When a snapshot note contributes to the answer, cite BOTH the snapshot and its parent session so the user can navigate up:

   "Mid-session you sketched the API shape ([[2026-04-18-demo-aa-snapshot-140000]]; parent: [[2026-04-18-demo-aa]])."

If the notes contain contradictory information (e.g. a decision was changed later), surface that explicitly:

"You initially chose X ([[older-note]]), but later switched to Y ([[newer-note]])."

Step 8 — Present answer

Display the synthesized answer from Step 7 in the conversation.

Do NOT write anything to the vault — this skill is read-only.

If the user asks a follow-up question, return to Step 2 with the new question.

Key distinction

/vault-search returns a ranked list of matching notes. /vault-ask returns a reasoned, cited answer synthesized from note content.

Use /vault-ask when the user wants to know what their notes say, not which notes match.

Edge Cases

• Single result: Synthesize from that one source. Be explicit about limited coverage: "Only one relevant note was found..."
• All results are old (>90 days): Mention this: "Your most recent notes on this topic are from <date>."
• Question is ambiguous (multiple interpretations): Answer each interpretation with a subheading, or ask the user to clarify before proceeding.
• No matching tags, only content matches: That is fine — tag matches are bonus scoring, not required.
• Config exists but vault path is invalid: Warn the user and suggest running /obsidian-setup again.