# Nature Academic Search

> Multi-source literature search, citation verification, MeSH search strategy, citation file management (.nbib/.ris/.bib conversion), and reference management (BibTeX, related articles, ID conversion) via MCP tools (PubMed, CrossRef, arXiv, Scopus, ScienceDirect). Use when the user needs coordinated multi-step literature workflows beyond a single MCP call. Also trigger on general literature-search needs during academic writing even without the word "Nature", such as searching for papers/literature, doing a literature review, verifying a citation, converting citation files, and Chinese phrasings like 文献检索、查文献、找文献、 文献综述检索、查论文、引文核对、参考文献管理、文献去重.

- Skill: `yniantongtian-oss/nature-academic-search` (Agent Skill, multi-file: 44 files)
- Install (CLI): `npx skillmds@latest add yniantongtian-oss/nature-academic-search`
- Raw SKILL.md: https://api.skillmd.com/api/skills/yniantongtian-oss/nature-academic-search/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: yniantongtian-oss (https://skillmd.com/u/yniantongtian-oss)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/yniantongtian-oss/nature-academic-search

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# Academic Search — Router

This skill is split into two layers:

- A **static layer** under `static/` that holds versioned, reusable content fragments (the MCP tool inventory and shared modules, and source routing plus operational rules).
- A **dynamic layer** (this file plus `manifest.yaml`) that detects which workflow the user needs and loads that workflow, reaching for shared modules and scripts only when a step needs them.

Do not try to apply the search logic from memory or from this router. Always load fragments from disk as described below.

## Routing protocol

Follow these five steps every time the skill is invoked.

### 1. Load the manifest and the core layer

Read [manifest.yaml](manifest.yaml). It declares the `workflow` axis, the allowed values, and the file paths each value maps to.

Also read every file listed under `always_load`:

- `static/core/tools.md` — the MCP tool inventory (core search, extended search, PubMed utilities) and the shared-module map.
- `static/core/routing-and-ops.md` — the T1→T2→T3 source routing quick guide, environment setup, error handling, and limitations.

### 2. Detect the workflow

Map the user's need to one or more `workflow` values:

- `multi-source-search` — find literature across sources.
- `citation-verification` — verify citations extracted from a document.
- `mesh-strategy` — build a MeSH/PubMed search strategy.
- `citation-file-mgmt` — convert/manage `.nbib`/`.ris`/`.bib` files.
- `reference-mgmt` — BibTeX, related-article discovery, ID conversion.

A combined request (for example search then export) may need more than one. State the detected workflow(s) in one short line before proceeding.

### 3. Load the matching workflow fragment(s)

Read the file mapped for each detected workflow (under `references/workflows/`). Do **not** read every workflow. Each workflow file links to the shared modules it needs.

### 4. Run the workflow using the loaded material

Apply the loaded material in this order:

1. Core tools and routing (`core/tools.md`, `core/routing-and-ops.md`) — which MCP tool for which need, and the T1→T2→T3 fallback chain that is the standard execution order across all workflows.
2. The workflow fragment — its specific steps.
3. Shared modules and scripts on demand (dedup, citation parser, search strategy, RIS/BibTeX format, format converter).

Report specific tool failures and continue with remaining tools; broaden terms when there are no results; fall back to manual generation from MCP-fetched metadata if a script fails twice.

### 5. Reach for references only when needed

The files under `references/` (and `scripts/`) are deep references, not defaults. Open them on demand per the `references.on_demand` table in the manifest — for example `references/source-tiers.md` for the full reliability classification, `references/dedup-engine.md` / `references/citation-parser.md` / `references/search-strategy.md` / `references/ris-bibtex-format.md` for the shared modules, and `scripts/format-converter.py` / `scripts/preflight.py` for the tooling.

## Why this split

- The static layer is versioned and reviewable; the workflow files and shared modules were already factored this way.
- The dynamic layer keeps each invocation cheap: only the workflow the user needs enters context, instead of all five plus every module.
- The router itself is short on purpose. Update fragments and references, not this file, when adding scope.
- This structure mirrors the other nature-* skills (`nature-writing`, `nature-polishing`, `nature-reader`, `nature-paper2ppt`, `nature-figure`, `nature-citation`, `nature-response`, `nature-data`).