Obsidian vault sync

Obsidian Vault sync / audit

Project-agnostic, global skill. It keeps an Obsidian Vault honest: scans the live codebase and the vault in parallel, diffs their states across 11 checks, and applies fixes only after the user approves each finding. The vault is always a mirror of ground truth — this skill is the sync mechanism that maintains that property over time.

Pairs with /obsidian-vault (which creates the vault). If no vault exists yet, stop and direct the user there.

Scope flags (parsed from invocation text)

Flag	Limits audit to
--tags	Tag drift and taxonomy checks only
--content	Note staleness, dead links, orphans, ADR staleness
--structure	Folder structure, canvas, _AI-CONTEXT.md drift
--plugins	Plugin/settings recommendations only
--all	All checks (default when no flag is given)

Procedure

1. Orient

• Locate the vault root: check <repo>/.obsidian-vault/ by default; ask if not found.
• If the vault root does not exist: stop, explain, suggest running /obsidian-vault first.
• Parse any scope flag from the invocation (default --all).
• Show the user: vault path, scope, and the list of checks that will run. Confirm before scanning.

2. Scan (two agents in parallel)

Spawn both simultaneously and wait for both to return before proceeding:

Agent A — Codebase scan (built-in Explore agent, read-only):

"Scan this repository and return a structured summary: (1) all top-level components/modules (folder names, package names from manifests), (2) key file paths (README, entrypoints, CI config, any architecture docs), (3) recent git activity — files added, deleted, or renamed in the last 60 commits (run git log --diff-filter=ADR --name-status --oneline -60), (4) any file paths that were deleted or renamed. Return a structured plain-text report — no file dumps, no code excerpts."

Agent B — Vault scan (vault-scanner custom agent): Spawn the vault-scanner agent (defined in this repo under global/claude/agents/vault-scanner.md) against the vault root. It returns a structured vault state report covering: all notes with their frontmatter, wikilinks, and sizes; all tags in use; tags defined in _TAG-TAXONOMY.md; folder structure; orphan candidates; dead wikilinks; .obsidian/ config contents; template frontmatter schemas; and all Dataview query blocks.

3. Diff → audit report

Cross-reference Agent A and Agent B outputs to evaluate every active check. For each check, produce a finding entry:

[CHECK NAME]  severity: high | medium | low
Summary: <one sentence>
Affected: <list of file paths or note titles>
Action: <add note | update frontmatter | fix wikilink | update canvas | skip | manual>

The 11 checks and their logic:

1. Missing coverage — components in Agent A output with no matching note in 01-Architecture/ or 06-Reference/. Severity: high if component has >5 source files.

2. Stale content — notes containing file paths (from Agent B) that appear in Agent A's deleted/renamed list. Severity: high if the note is an active ADR or architecture note.

3. Dead wikilinks — wikilinks and related: values from Agent B that don't resolve to any note path in Agent B's inventory. Severity: medium.

4. Orphan notes — notes from Agent B with no outgoing wikilinks in body and not referenced by any other note's related: field. Severity: low (may be intentional stubs).

5. Tag drift — two sub-checks:

   • Tags used in notes (Agent B) absent from _TAG-TAXONOMY.md → severity: medium
   • Tags in _TAG-TAXONOMY.md never used in any note → severity: low

6. Frontmatter drift — notes missing fields required by the current template for their type: value. Derive required fields by reading _templates/TPL-<type>.md frontmatter. Severity: medium (breaks Dataview queries).

7. ADR staleness — notes with type: adr and status: active that contain file paths appearing in Agent A's deleted/renamed list. Severity: high.

8. Canvas freshness — compare nodes in Architecture.canvas against components in Agent A output: nodes for deleted components (remove), missing nodes for new ones (add). Severity: medium.

9. _AI-CONTEXT.md drift — Agent B's folder list differs from what _AI-CONTEXT.md describes, or new tag conventions exist that aren't documented there. Severity: medium.

10. Dataview query health — Dataview blocks from Agent B that query a FROM path or filter on a type:/status: value that doesn't appear in Agent B's folder structure or note inventory. Severity: medium.

11. Plugin/settings recommendations — compare Agent B's community-plugins.json against vault usage patterns (e.g., Tasks plugin listed but no task syntax found in notes → flag as unused). Use WebFetch for one targeted lookup only if clearly useful (e.g., checking whether a listed plugin has been deprecated). Severity: low.

4. Present the full audit report

Show all findings before touching anything. Group by severity (high → medium → low). For each finding, show the check name, severity, affected files, and recommended action. Finish with a summary: N high / M medium / P low findings. Nothing changed yet.

If no findings: report "vault is fully in sync — nothing to update" and stop.

5. Apply fixes (approval-gated, per section or per item)

Ask the user: approve all high-severity findings, or go item by item?

For each approved finding, apply using this decision tree:

Safe to apply directly (no user content at risk):

• Add missing frontmatter fields to a note (append only; never rewrite existing fields)
• Add missing #component/<name> tags to _TAG-TAXONOMY.md
• Remove unused taxonomy tags (after confirming none are used)
• Update Architecture.canvas nodes (add/remove nodes for new/deleted components)
• Fix a dead related: wikilink if the correct target is unambiguous
• Update _AI-CONTEXT.md folder list / tag conventions section

Requires diff review before applying:

• Any note whose line count is significantly larger than its template stub — show a side-by-side diff of proposed changes vs current content; user chooses apply / skip / manual-merge.

Never apply automatically (always manual):

• ADR body content (user's decision text)
• Session log entries
• Research findings
• Any note with status: active where the proposed change rewrites meaning, not just metadata

6. Hand off

• List every file changed and every finding skipped.
• If any findings were skipped, offer to save the unresolved list to <vault-root>/00-Home/_Sync-Backlog.md for follow-up.
• Remind the user that re-running obsidian-vault-sync on an up-to-date vault should produce zero findings.

Guardrails

• Never start applying changes before presenting the full audit report (step 4 before 5).
• Never overwrite user-written note content without showing a diff and getting explicit approval. User content is irreplaceable; vault structure is not.
• Never delete notes — only flag orphans for the user to decide.
• Treat any note larger than ~2× its template stub as user-owned content; use diff review.
• If the vault root is not found, stop immediately — do not create directories or guess paths.
• Never fabricate findings: every reported issue must be traceable to something Agent A or Agent B actually returned.
• Keep the two scans strictly parallel; do not use one agent's output to guide the other.