Read, create, update, delete, rename a note, or edit its frontmatter. action=read returns content+frontmatter+contentHash+revisionHash+outgoingLinks. Path accepts vault-relative paths, titles, and frontmatter aliases (except create, which writes the literal path). update: prefer patch (old_string/new_string) or replace_section (heading); replace is size-guarded; optional frontmatter merge on the same update (one journaled op for body + metadata). Pass expectedRevision from read to detect concurrent edits (expectedHash remains a deprecated body-hash alias). Mutations return operationId/undoAvailable when journaling is enabled; use vault undo to reverse.

Find notes. action=content (default): full-text search, prefer 2-3 keywords, token-AND with OR fallback and typo correction, format=compact for index-only results. action=by_tags: frontmatter tag filter (AND). action=list: enumerate notes by folder (missing folder -> not_found). action=recent: newest first. action=tags: full tag vocabulary with counts; accepts no other arguments. content/by_tags/list/recent support cursor/truncated/nextCursor (stale cursor -> structured error with details.changedPaths). Responses may set incomplete+skipped when the vault scan could not read every file. list/recent/content exclude index/log/hot/_raw/_archives unless includeOperational=true.

Return a note's link neighborhood: resolved outgoing wikilinks, unresolved outgoing links, plus paginated backlinks (notes linking here). Depth 1 only. Path accepts vault-relative paths, titles, and frontmatter aliases.

Vault maintenance. action=health: structured report (orphans, broken links, index drift, stale pages). action=sync_index: regenerate index.md from frontmatter. action=slop_check: read-only LLM-slop report (body + frontmatter). action=deslop: journaled char/emoji auto-fix (confirm: true; dryRun preview). action=create_folder/list_folders/delete_folder: folder ops (delete requires confirm, empty folders only). action=log: append to log.md and optionally hot.md (wiki bookkeeping). action=history: list journaled operations. action=undo: reverse a journaled operation (requires confirm: true). action=manifest: typed read/upsert/remove for _meta/manifest.md ingest ledger.