jackwener--opencli/docs/conventions/listing-detail-id-pairing.md

Listing↔detail ID pairing (advisory)

Status: advisory convention, not a CI gate. Use as guidance when designing listing columns; an audit script (npm run advise:listing-id-pairing) can surface candidate listings for human review.

When a site exposes both a listing-class command (search / hot / recent / top / feed / ...) and a detail-class command (read / paper / article / job / view / ...), it's usually nicer for agents if the listing rows include an id-shaped column whose value can be passed directly into the detail command.

Without that, the agent has to either re-search by title or scrape a URL out of band to follow up on a listing row.

Soft convention

If <site> has both a listing command and a detail command, prefer giving each listing row a column whose value round-trips into the detail command's positional argument.

That column is whatever the detail command expects:

Site	Listing	Detail	Round-trip column
hackernews	top / best / ask / jobs / show / new	read <id>	id
hupu	hot / search	detail <tid>	tid
lobsters	hot / active / newest / tag	read <id>	id (Lobsters short_id value)
arxiv	search / recent	paper <id>	id
stackoverflow	hot / search / bounties / unanswered	read <id>	id
openreview	search / venue	paper <id> / reviews <forum>	id
devto	top / tag / user	read <id>	id
bilibili	hot	video <bvid>	bvid
reddit	hot	read <id>	id
bluesky	user	thread <uri>	uri
1688	search	item <url-or-offer-id>	offer_id
tieba	search	read <id>	id
jike	feed / search / user	post <id>	id
weibo	feed / search	post <id>	id

Why this matters

The agent never has eyes on a webpage. It sees the listing rows as a plain table of strings. If the listing emits [rank, title, author, votes] and the detail command needs an id, the agent has three bad options:

1. Re-search by title — fragile, may hit a different post for ambiguous titles, costs an extra round-trip plus quota.
2. Parse the URL — assumes URL shape stays stable and is regex-able, often breaks across A/B buckets or after a site redesign.
3. Hand-craft a search — pure guess; agents trained to do this leak the failure mode silently downstream.

Surfacing the id in the listing collapses all three into a single, unambiguous column.

Why this is advisory, not a gate

Whether a listing should pair with a detail is a case-by-case product/UX call. Many legitimate listings genuinely don't pair:

• Topic-string listings (twitter trending, weibo hot) — rows are search keywords, not addressable entities.
• Profile-attribute listings (reddit user, lesswrong user, weibo user) — rows are [field, value] pairs of one profile.
• UI-only sessions (discord-app search, app quick find surfaces) — page ids aren't extractable from the rendered DOM.
• Comment / reply listings — sub-resources of a parent thread; the detail command fetches the parent, not the comment.

A hard CI gate forced authors to either add an artificial id column or file an exemption with a reason — both of which were higher cognitive cost than the silent-loss bugs the rule actually catches. See PR #1311 thread for the broader "anti-pattern vs case-by-case" filter.

What counts as an "id-shaped column"

The advisory script (scripts/check-listing-id-pairing.mjs) considers any of these column names a valid round-trip handle:

• Exact id / short_id
• Anything ending in _id or Id (e.g. offer_id, paperId)
• Domain-specific ids: jk (indeed), tid (thread id), bvid / aid (bilibili), sku (retail product SKU), asin (amazon), isbn, doi, slug
• username / handle (only when the detail command keys off the user rather than a post)
• url — only when the detail command's positional argument explicitly accepts a URL (for example read <url-or-id>, article <url>, or help text such as Post ID or full URL). URL is not a valid substitute when the detail command only says an id comes "from URL"; callers would still need to parse the URL out of band.
• uri — for sites whose canonical handle is a URI scheme (e.g. Bluesky's at://did:.../app.bsky.feed.post/...).

If the natural id for your site is a different shape, add the pattern to ID_COLUMN_PATTERNS in the script.

How to add an id column to a listing

1. Find the source field. Most listing endpoints already include the id in their raw response — they're just dropped before the row is shaped. Check func's mapper before adding new fetch logic.

2. Pick the column position. Convention is [rank, id, ...rest, url] so identifiers stay near the front and the URL stays last.

3. Update the docs. The site's docs/adapters/browser/<site>.md should list the new column under "Listing columns" and call out that it round-trips into the detail command.

4. Optional: run the advisory script to confirm the manifest reflects the new column.

   npm run advise:listing-id-pairing
   

Advisory script usage

# Print a report of listings that don't currently carry an id-shaped column.
# Always exits 0 — does not fail CI.
npm run advise:listing-id-pairing

The script reads cli-manifest.json, so always rebuild the manifest (npx tsx src/build-manifest.ts) after touching adapter columns.

Related principles

• docs/developer/ts-adapter.md — adapter authoring conventions, including the required access: 'read' | 'write' metadata.
• "Output design" reference inside the bundled opencli-adapter-author skill — column naming, ordering, and id-first conventions.