kb-meta-fetch

Original：🇺🇸 English

Translated

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Fetch journal articles from Crossref published after a user-specified date and insert them into PostgreSQL `journals` with DOI deduplication. Use when incrementally ingesting journal metadata from `journals_issn` into `journals`.

1installs

Sourcetiangong-ai/skills

Added on2026-02-13

NPX Install

npx skill4agent add tiangong-ai/skills kb-meta-fetch

SKILL.md Content

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KB Meta Fetch

Core Goal

Pull
```
journal-article
```
records from Crossref after a given
```
--from-date
```
.
Read ISSN seed rows from
```
journals_issn
```
(
```
journal
```
,
```
issn1
```
).
Insert rows into
```
journals
```
with
```
ON CONFLICT (doi) DO NOTHING
```
.
Keep the implementation aligned with
```
1_crossref_multi_increment.py
```
.

Run Workflow

Set database connection env vars (user-managed keys prefixed with
```
KB_
```
):

```
KB_DB_HOST
```
```
KB_DB_PORT
```
```
KB_DB_NAME
```
```
KB_DB_USER
```
```
KB_DB_PASSWORD
```
```
KB_LOG_DIR
```
(required, log output directory)

Run incremental fetch with a required date:

bash

python3 scripts/crossref_multi_increment.py --from-date 2024-05-01

If executing through an
```
exec
```
tool call, set timeout to 1800 seconds (30 minutes).

Check logs in:

${KB_LOG_DIR}/crossref-YYYYMMDD-HHMMSS.log

(UTC timestamp, one file per run)

Build user-facing summary strictly from the current run output:

Prefer

RUN_SUMMARY_JSON

emitted by

crossref_multi_increment.py

.

If JSON is unavailable, parse only this run's
```
${KB_LOG_DIR}/crossref-YYYYMMDD-HHMMSS.log
```
.
```
total_inserted
```
must mean rows inserted in this run (after DOI dedup), not cumulative rows in table.

Behavior Contract

Query Crossref endpoint:

https://api.crossref.org/journals/{issn}/works

.

Filter with

type:journal-article,from-pub-date:<from-date>

.

Keep only items whose
```
container-title
```
equals target journal title (case-insensitive).
Continue pagination with cursor until no matching items remain.
Store fields in
```
journals
```
:
```
title
```
,
```
doi
```
,
```
journal
```
,
```
authors
```
,
```
date
```
.
Reporting/announcement metrics must use current-run log/summary only.
Do not compute announcement counts via database-wide or time-window SQL such as
```
WHERE date >= ...
```
.

Scope Boundary

Implement only Crossref incremental fetch + insert into
```
journals
```
.

Script

```
scripts/crossref_multi_increment.py
```