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name: extraction-form description: | Extract study data into a structured table (papers/extraction_table.csv) using the protocol’s extraction schema. Trigger: extraction form, extraction table, data extraction, 信息提取, 提取表. Use when: systematic review 在 screening 后进入 extraction（C3），需要把纳入论文按字段落到 CSV 以支持后续 synthesis。 Skip if: 还没有 papers/screening_log.csv 或 protocol 未锁定。 Network: none. Guardrail: 严格按 schema 填字段；不要在此阶段写 narrative synthesis（那是 synthesis-writer）。

Extraction Form (systematic review)

Goal: create a consistent, analysis-ready extraction table that is directly grounded in the protocol.

Inputs

Required:

• papers/screening_log.csv
• output/PROTOCOL.md

Optional:

• papers/paper_notes.jsonl (if you already have structured notes)

Outputs

• papers/extraction_table.csv

Workflow

1. Determine the included set

   • From papers/screening_log.csv, collect all rows with decision=include.

2. Build/confirm the schema

   • Use the extraction schema defined in output/PROTOCOL.md.
   • If the protocol does not define fields yet, stop and update output/PROTOCOL.md first.

3. Populate papers/extraction_table.csv

   • One row per included paper.
   • If papers/paper_notes.jsonl exists, use it as a structured source for values/provenance (but keep the table schema governed by output/PROTOCOL.md).
   • Always include provenance columns:
     • paper_id, title, year, url
   • For each protocol-defined field:
     • fill concrete values (units explicit)
     • use an explicit sentinel for unknowns (recommended: empty cell + notes)

4. Keep it auditable

   • If a value is inferred (not directly stated), mark it in a notes column.
   • Do not write synthesis; only extraction.

5. Quick QA

   • Ensure 1:1 coverage: included papers == extraction rows.
   • Spot-check a few rows against the paper text/notes.

Definition of Done

• papers/extraction_table.csv exists.
• Every included paper from papers/screening_log.csv has exactly one extraction row.
• Column meanings match output/PROTOCOL.md (no ad-hoc columns without updating the protocol).

Troubleshooting

Issue: the protocol does not specify extraction fields

Fix:

• Update output/PROTOCOL.md (extraction schema section) and re-run extraction.

Issue: extraction table mixes narrative text with fields

Fix:

• Move narrative into a notes column and keep the rest as atomic values (numbers/enums/short strings).