Add /ask to wiki-operator (grounded Q&A over the vault)

[Hefrock]

Implements /ask — the last identified gap in the wiki lifecycle (Retrieve). No new MCP capability needed; this closes a behavioral gap, not a plumbing one.

Why this one, after rename_note and ingestion got retracted

wiki-operator's own SKILL.md description has listed "what do I know about Y" as a trigger phrase since it was written — with no command behind it. That's a documented promise with no algorithm, which is a real, evidenced gap (unlike the other two, which turned out to already be covered by existing primitives + judgment).

What /ask does

• search_notes + read_note, scoped to Knowledge/ and Sources/ first (the vetted material); Journal/Daily/ only as a flagged last resort, explicitly marked as unprocessed
• optional one-hop list_links expansion to pull in tightly connected notes
• every claim in the answer carries an inline [[citation]]; draft/low-confidence sources are labeled as such, never presented with false authority
• never blends vault content with general knowledge silently — an unanswerable question is stated plainly; the user is asked before any general-knowledge fallback, which is always clearly labeled as outside the vault

The new artifact — Maps/_ask_log.md

Unanswered queries are appended here (template: assets/ask-log.md). This makes wiki-governor's Phase 4 gap-queue input real for the first time — previously it referenced "failed /ask queries" vaguely, since /ask didn't exist. Governor's Phase 4 now cites the file explicitly.

Single-writer discipline, documented in knowledge-os/architecture.md: /ask appends only, wiki-governor reads only — the same one-owner-per-artifact pattern already used for MCP writes (backup-before-overwrite, atomic rename).

Also fixed while in these files

• README's wiki-system prose still only listed 3 wiki skills — wiki-governor was missing (an oversight from the prior PR). Corrected.

Files

• skills/wiki-operator/SKILL.md — /ask command, updated description/trigger list, vault-structure diagram, output discipline
• skills/wiki-operator/assets/ask-log.md — new template
• skills/wiki-governor/SKILL.md — Phase 4 now cites _ask_log.md explicitly
• knowledge-os/architecture.md — new "Governance artifacts" section documenting the single-writer pattern
• README.md — command list + wiki-system prose fix

Docs-only change (no runnable code), so nothing new for CI to execute.

🤖 Generated with Claude Code

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