lit-sync - SKILL.md Agent Skill

name: lit-sync description: Sync research references from .bib files to Zotero library + Obsidian literature notes. Extract cross-cutting concept notes when enough literature accumulates. Works after /search-lit or standalone. triggers: lit-sync, 문헌 동기화, 레퍼런스 정리, 개념 노트 추출, lit sync, Zotero 동기화, reference sync, 참고문헌 옵시디언 tools: Read, Write, Edit, Bash, Grep, Glob model: inherit

Literature Sync: Zotero + Obsidian Pipeline

Takes the .bib output of /search-lit (or any user-specified .bib file) and synchronizes the references into the Zotero library and Obsidian literature notes. When enough literature notes accumulate, extracts cross-cutting concept notes.

Communication Rules

Communicate with the user in their preferred language.
Vault layout — honor what exists, default to English. Before creating notes, detect the vault's existing layout: if the vault already uses a particular folder structure (including a Korean one such as 02 연구/문헌/ and 02 연구/개념노트/), honor it — never silently rename a user's folders. For a new or unclear vault, default to the English folders Literature/ and Concepts/ with the English note templates below.
A Korean opt-in variant (Korean folder layout + Korean-heading templates) lives in references/locale/ko/note_templates.md — use it when the vault is Korean-structured or the user prefers Korean notes.

When to Use

After /search-lit completes — sync the produced .bib into Zotero + Obsidian.
Bulk-register references from an existing .bib into Zotero + Obsidian.
Tidy the references/ folder inside a project workspace.
On explicit concept-extraction request → extract cross-cutting concepts from existing literature notes.

Prerequisites

Project owner only — /lit-sync is an owner-scoped operation per docs/zotero_policy.md. Collaborators consume the committed manuscript/_src/refs.bib snapshot read-only.
Zotero desktop 7.x + Better BibTeX plugin installed.
Better BibTeX "Keep updated" auto-export configured to <project>/manuscript/_src/refs.bib (owner setup checklist in docs/zotero_policy.md §Setup).
Zotero MCP server available (skip the Zotero phase if not connected; auto-export refresh still fires once Zotero is reopened).
Obsidian CLI or direct file writing to the Obsidian vault.
Obsidian vault path: configured in user's environment (e.g., $OBSIDIAN_VAULT).

Artifact Contract

Per docs/artifact_contract.md, /lit-sync is the sole writer of:

Artifact	Writer	Readers
`manuscript/_src/refs.bib`	`/lit-sync` (via Better BibTeX auto-export trigger)	`/write-paper`, `/verify-refs`, `/render`
`references/zotero_collection.json`	`/lit-sync`	`/verify-refs`, `/sync-submission`

Direct hand edits to refs.bib are drift — revert on sight.

Pipeline Overview

.bib file (or /search-lit output)
    │
    ▼ Phase 1: Parse
    Extract DOI, PMID, title, authors, journal, year
    │
    ▼ Phase 2: Zotero Sync (owner)
    Dedupe → zotero_add_by_doi → place in collection → pin citekey
    │
    ▼ Phase 2.5: refs.bib snapshot refresh
    Trigger Better BibTeX auto-export → verify manuscript/_src/refs.bib mtime updated
    │
    ▼ Phase 3: Obsidian Literature Notes
    Create Literature/{citekey}.md (empty note OK — fill later with highlights)
    │
    ▼ Phase 4: Concept Extraction (conditional)
    ≥10 literature notes → scan for cross-cutting concepts → propose concept notes

Phase 1: Parse BibTeX

Input

The user-specified .bib file path, or the .bib just produced by /search-lit.

Process

# Parse .bib entries with regex.
# Extract per entry:
#   - citekey (e.g., Kim_2024_Validation)
#   - doi
#   - pmid
#   - title
#   - authors (first + last minimum)
#   - journal
#   - year
#   - volume, number, pages (if present)

Log any parse failures and skip those entries.

Phase 2: Zotero Sync

Step 2.1: Determine project collection

Identify the project from the current working directory or from an explicit user override. Reuse an existing collection key if one is recorded; otherwise create a new collection.

Collection mapping: Check existing Zotero collections for the current project. If no collection exists, create one with zotero_create_collection. Record the collection key for future use.

Step 2.2: Dedupe + add

For each entry:

Use zotero_search_items to search by DOI or title — if already present, skip.
Otherwise call zotero_add_by_doi (when a DOI is available) or zotero_add_by_url (falling back to the PubMed URL when no DOI is available).
Use zotero_manage_collections to place the item in the project collection.

Step 2.3: Result report

Zotero Sync:
  Added:     8 papers (new)
  Skipped:   3 papers (already in library)
  Failed:    1 paper (no DOI/PMID)
  Collection: RFA-Meta (TZQEP4NH)

If the Zotero MCP is not connected, skip this entire phase and proceed to Phase 3.

Always write references/zotero_collection.json in the project workspace:

{
  "schema_version": 1,
  "status": "synced",
  "collection": "RFA-Meta",
  "collection_key": "TZQEP4NH",
  "added": 8,
  "skipped": 3,
  "failed": 1
}

If Zotero is unavailable, write the same file with status: "skipped" and a human-readable reason.

Phase 2.5: refs.bib snapshot refresh

Better BibTeX "Keep updated" auto-export normally refreshes manuscript/_src/refs.bib within seconds of a Zotero change. This phase verifies the snapshot actually updated before downstream skills consume it.

Step 2.5.1: Resolve path

Read SSOT.yaml → truth.refs_bib. Default: manuscript/_src/refs.bib. If absent (legacy project), fall back to manuscript/_src/refs.bib and emit a WARN recommending SSOT migration.

Step 2.5.1b: Precondition assertion (early-exit, do NOT poll)

Before entering the 10s polling loop in Step 2.5.2, verify both preconditions. If either fails, abort Phase 2.5 with setup instructions instead of waiting for a timeout that will never resolve.

BBT auto-export registered. ~/Zotero/better-bibtex/read-only.json must be a non-empty JSON list. Check with:
```
python3 -c 'import json,sys,pathlib; p=pathlib.Path.home()/".zotero"/"zotero"/"Profiles"; \
  f=pathlib.Path.home()/"Zotero"/"better-bibtex"/"read-only.json"; \
  sys.exit(0 if f.exists() and json.loads(f.read_text() or "[]") else 1)'
```
Or equivalent shell: [ -s ~/Zotero/better-bibtex/read-only.json ] && [ "$(jq 'length' ~/Zotero/better-bibtex/read-only.json)" -gt 0 ].

On failure print:

Phase 2.5 skipped: BBT auto-export not configured (~/Zotero/better-bibtex/read-only.json is empty or missing). Set up "Keep updated" auto-export per docs/zotero_policy.md §Setup, then re-run /lit-sync.
Target refs.bib exists. The resolved truth.refs_bib path from Step 2.5.1 must exist on disk (even empty is OK — BBT will overwrite). On failure print:

Phase 2.5 skipped: target snapshot <path> not found. Configure BBT auto-export with "On Change" to the SSOT path, then re-run.

In either early-exit, set refs_bib_refreshed: false + reason: "precondition:<which>" in the Step 2.5.3 JSON and return control to the caller. /verify-refs treats refs_bib_refreshed: false as an unverified snapshot — downstream skills (/write-paper, /render) block until the precondition is resolved.

Rationale (2026-04-24 Phase 1B-b dry-run): on a machine with BBT installed but no auto-export registered, the original Step 2.5.2 polled for 10s then emitted a generic "mtime unchanged" WARN that did not point at the actual cause. Findings: ~/.local/cache/phase1b_b_dryrun/findings.md.

Step 2.5.2: Verify refresh

After Phase 2 adds items:

Capture stat -f "%m" manuscript/_src/refs.bib before Zotero writes.
Wait up to 10s (Better BibTeX debounce). Poll mtime.
If mtime unchanged after 10s:
- Prompt user to check Zotero is running and BBT export is "Keep updated".
- If BBT auto-export path is wrong, print the expected path (<project>/manuscript/_src/refs.bib) and refer to docs/zotero_policy.md §Setup.
- As last resort, offer manual export: File → Export Library → Better BibTeX → target path.
Once mtime advances, grep for the newly added citekeys. All must be present; if any is missing, report as failure (do NOT fabricate entries).

Step 2.5.3: Record in zotero_collection.json

Append to the JSON written in Step 2.3:

{
  "refs_bib_path": "manuscript/_src/refs.bib",
  "refs_bib_mtime": "2026-04-24T14:32:11Z",
  "refs_bib_refreshed": true,
  "citekeys_verified": ["Kim_2024_Validation", "..."]
}

If refresh failed, set refs_bib_refreshed: false and include reason. /verify-refs uses this flag to decide whether the snapshot is trustworthy.

Phase 3: Obsidian Literature Notes

Step 3.1: Check existing literature notes

# Default English layout; substitute the vault's existing folder if one is present
# (e.g. "02 연구/문헌/" for a Korean-structured vault — see references/locale/ko/note_templates.md).
ls "$VAULT/Literature/" | grep -v "📊" | wc -l

Step 3.2: Create literature notes

For each .bib entry, create Literature/{citekey}.md (or the vault's existing literature folder). Skip if the file already exists (never overwrite).

Template

---
notetype: literature
citekey: "{citekey}"
title: "{title}"
authors: "{authors}"
journal: "{journal}"
year: {year}
doi: "{doi}"
pmid: "{pmid}"
created: "{today}"
tags:
  - type/literature
  - _unread
---

# {title}

## Bibliographic info
- **Authors**: {authors}
- **Journal**: {journal}{volume_issue_pages}
- **Year**: {year}
- **DOI**: [{doi}](https://doi.org/{doi})
{pmid_line}

## Key points (in my own words)



## My thoughts



## Related notes
- [[Research Hub]]
- [[Papers & Reviews]]
-
-

(For a Korean-structured vault, use the Korean-heading template in references/locale/ko/note_templates.md and the vault's own hub-note names.)

Rules:

notetype: literature — compatible with the Zotero Integration template.
_unread tag — change to _read later after the user reads the PDF in Zotero and adds highlights.
Leave ## Key points and ## My thoughts blank — the user fills these in personally.
## Related notes contains 2 hub links + 2 empty slots (reserved for later concept-note linking).
If a PMID is available, add a PubMed link.

Step 3.3: Result report

Obsidian Literature Notes:
  Created:   8 notes (new)
  Skipped:   3 notes (already exist)
  Location:  Literature/
  Total in vault: 12 literature notes

Phase 4: Concept Extraction (conditional)

Trigger condition

Run this phase only when there are ≥10 literature notes in the vault. If fewer exist, print a status message like "N literature notes — concept extraction unlocks at ≥10" and stop.

Step 4.1: Cross-cutting concept scan

Read all files under Literature/*.md (or the vault's existing literature folder):

Extract keywords from each paper's title, journal, and tags.
Extract major concepts from the .bib entry titles.
Identify concepts that co-occur across ≥3 literature notes.

Step 4.2: Filtering (5 exclusion rules)

Exclude from concept candidates:

Model names (GPT-4, Claude, etc.).
Dataset names (MedQA, ImageNet, etc.).
Journal names.
Institution names.
Generic technique names (too unspecific).

Whatever remains becomes a concept-note candidate.

Step 4.3: Draft concept note

Create Concepts/{concept name}.md (or the vault's existing concept-note folder):

---
title: "{concept name}"
type: concept
tags:
  - concept
  - {domain tag}
aliases:
  - {alternative name}
related_papers:
  - "[[{lit-note-1}]]"
  - "[[{lit-note-2}]]"
  - "[[{lit-note-3}]]"
status: 🌱Seedling
---

# {concept name}

## Definition (My Understanding)
> TODO: write in your own words

## Why it matters
{why the concept matters in this domain — AI supplies a draft}

## Per-paper perspectives
- **[[{lit-note-1}]]**: {this paper's angle}
- **[[{lit-note-2}]]**: {a different angle}
- **[[{lit-note-3}]]**: {comparison / complement}

## Related concepts
- [[{another concept}]]

## Open questions
- {open question 1}
- {open question 2}

## Related notes
- [[Research Hub]]
- [[{related project hub}]]
- [[{lit-note-1}]]
- [[{lit-note-2}]]

(For a Korean-structured vault, use the Korean-heading concept template in references/locale/ko/note_templates.md.)

Key rules:

Keep the ## Definition section as a > TODO marker — the 2nd-layer note only becomes meaningful once the user writes the definition in their own words.
status always starts at 🌱Seedling.
At least 4 wikilinks under ## Related notes (vault convention).

Step 4.4: Propose to the user

Concept-note candidates (≥3 papers cross-referenced):
  1. {Concept A} (4 papers)
  2. {Concept B} (3 papers)
  3. {Concept C} (5 papers)

Create? (all / selected / skip)

Create only after user confirmation. Auto-draft but always confirm.

Standalone Modes

This skill can run without a fresh .bib file.

Concept extraction only

On an explicit concept-extraction request, scan existing Literature/*.md (or the vault's existing literature folder) and run only Phase 4.

References tidy

On a "tidy this project's references" request, locate .bib files inside the workspace and run Phase 1–3.

Zotero sync only

On a "sync Zotero" request, diff the Zotero collection against the .bib file and add whatever is missing.

PMID-list ingestion (no .bib)

When the user supplies a list of PMIDs (e.g., from a HANDOFF or a colleague), resolve PMIDs to DOIs via PubMed esummary first, then enter Phase 2 with the DOIs:

PMIDS="12345,67890,..."
curl -s "https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esummary.fcgi?db=pubmed&id=${PMIDS}&retmode=json" \
  | jq -r '.result | to_entries[] | select(.key != "uids") | "\(.value.uid)\t\(.value.elocationid)\t\(.value.title)"'

For each resolved DOI call zotero_add_by_doi (auto-dedup by DOI). For items already in the library (returned as "skipped" or detected via zotero_search_items by DOI), use zotero_manage_collections to attach them to the project collection without re-adding — re-adding by URL/PubMed-URL would bypass DOI dedup and create duplicates. Record both added and existing items in references/zotero_collection.json.

If a PMID has no DOI in PubMed (rare; older papers, non-indexed), fall back to zotero_add_by_url with the PubMed URL and mark the entry as no_doi: true.

Safety Rules

Never overwrite literature notes — the user may have added highlights or personal notes.
Never auto-fill ## Definition of a concept note — keep the TODO marker; the essence of the 2nd-layer note is the user's own wording.
Skip Zotero for entries without a DOI — ask the user to add those manually.
Gracefully skip Zotero when the MCP is not connected — Obsidian notes are created independently; but do NOT hand-edit refs.bib to compensate (violates artifact contract).
Always record the collection key — report the key to the user when a new collection is created.
Never write refs.bib directly. Only Better BibTeX auto-export may write that file. If auto-export is broken, fix the Zotero setup rather than writing the file from this skill.
Owner-only execution. If the current user is a collaborator (no Zotero access per SSOT.yaml reference_manager.required_for), abort with instructions to flag [@NEW:topic] placeholders in the manuscript and notify the owner.

Anti-Hallucination

Never fabricate DOIs, PMIDs, or citation metadata. All bibliographic data must come from the .bib file or API responses.
Never auto-fill the "Definition (My Understanding)" section of concept notes. This must be written by the user.
Never overwrite existing literature notes. User highlights and annotations may be present.
If a DOI lookup fails, report the failure rather than guessing the metadata.