Cryptograss:Connectome/Has personnel

A proposal for Justin to decide. Written by blu at block 26,286,625, from the crawl reported in the connectome Mood on October 27, 2026. Nothing here is built.

The question

Add a record-level edge, Has personnel (a Record page → a Person page, one subobject per person per record), alongside the cut-level edge the wiki already has, Has performer (from {{Studio cut}})?

Yes or no is the decision. If yes, it comes with a template and one agreed rule about resolution (below).

Why

"Who played on this track" mostly cannot be answered from MusicBrainz and Discogs. Measured on October 27, walking outward from Unit of Measure and The Pizza Tapes: of 17 releases reached, 4 had any track-level credit; 13, including every live tape, had only release-wide credits ("tracks: all").

"Who was on this record with whom" can. A two-hop crawl from Unit of Measure alone, at block 26,285,792, gave 26 records, 53 credited people, 97 person→record edges, and 47 pairs of records that share a person. Chains it found: Unit of Measure → (Tony Rice) → Got Me a Martin Guitar → (Larry Rice) → Mr. Poverty (1975), which brings in Jerry Douglas and Ricky Skaggs.

Justin's framing, October 27: "I was on a record with somebody (even if not on the same track) that you were on a record with" is still a meaningful crawl. This edge is that fact, stored as data.

The rule that makes it safe

A record-level edge must never answer a track-level question. So the two edges stay distinct properties, and a trail or query says which resolution it walks:

• Has performer: cut level. The default for The Oracle of Bluegrass Bacon.
• Has personnel: record level. Walked only when asked for.

Weights still matter inside a resolution (a prolific player has dozens of record-neighbours per hop), but resolution is filtered first, then weighted. Agreed with re in the Mood on October 27.

Shape

Same pattern as {{Record release}}: a separate template, repeated on the record page, one call per person.

{{Record personnel|Tony Rice|instrument=guitar|source=https://musicbrainz.org/release/750499ef-…}}

Each call stores a subobject: Has personnel (the person), Has instrument (reused; exists), and the source URL. The page it goes on is the record page (e.g. 4masks), not the Release: page: the fact is about the recording, and Release: pages keep holding versions and CIDs.

It does not touch {{Studio cut}} or Has performer.

Checked

• Name is free on the wiki: a property search for "personnel" at block 26,285,792 returned nothing. Neighbours that exist: Has performer, Has member, Has member from/until, Has record, Has record artist, Recommended record.
• Name is free in code: nothing in pickipedia/extensions declares it (re, repo read, October 27).

If yes

1. blu writes Template:Record personnel and its four property pages, on the Record release pattern.
2. The crawler (an Artificial Dumb, read-only today) writes its person→record edges as proposed template calls, each with its MusicBrainz or Discogs source URL, for a person to verify.
3. Where neither database has personnel for a record (10 of the 26 crawled), nothing is written; those records go on a liner-notes worklist.

Open, not part of this decision

• Whether show pages carry personnel as data at all. Separate question, on Cryptograss:Moods/connectome/todo.
• Identity: the crawler matches names exactly and never merges, so "James Kerwin" and "Jim Kerwin" would be two people. It can miss an edge; it can't invent one.