agent broke out of the pagination loop on the first empty page

Not specified by the original author.

TL;DR

An empty page is not the end of the list on providers that return sparse pages. Keep paginating until the cursor itself says stop - null, missing, or repeating - and treat empty pages as "nothing here, keep going." The data after the gap is real and the client was leaving it behind.

The query

agent broke out of the pagination loop on the first empty page  -  the API legitimately returns empty pages mid-list

Steps

1. Confirm empty pages are legitimate on this provider

Check the provider's pagination docs for sparse or empty pages, or observe them directly: paginate manually past an empty page and see whether later pages contain items. If they do, empty pages are normal.

Expected: a yes from docs or direct observation that empty mid-list pages happen.

2. Move the termination condition to the cursor

Rewrite the loop to break only when the end-of-list signal fires: the next cursor is null, missing, or repeats a seen cursor. Remove any if not items: break logic. The loop condition should mention the cursor, not the item count.

Expected: a loop that pages through empty pages without stopping.

3. Keep collecting across the gaps

Make sure the accumulator appends whatever each page returns (possibly nothing) and continues. Do not reset state or short-circuit on an empty page.

Expected: the collected list includes items from pages after the empty ones.

4. Retain the safety backstops

Empty-tolerant loops still need the seen-cursor set and the maximum page count. Tolerance for empty pages plus a missing backstop is how a different infinite loop starts.

Expected: the loop ends on cursor exhaustion or the cap, never on emptiness.

5. Verify with a list known to have gaps

Run the fixed client against a list with known sparse regions and confirm the collected items match the expected full set, including items positioned after empty pages.

Expected: complete item set, loop exited cleanly via the cursor signal.

Use this when

• Fetches stop early with no error and the tail of the list is missing
• The generated code breaks on an empty data array
• The provider documents sparse pages, or you have observed items after an empty page
• The missing items cluster at the end of the list

Not for this skill when

• The provider signals the end WITH an empty page (then breaking is correct)
• The list is empty because of a filter or permission (check the query, not the loop)
• The cursor logic itself is broken (fix the cursor first)
• The endpoint genuinely returns all items on page one (no pagination needed)

Variant phrasings

loop stopped early but the provider has more data

Same fix. "More data exists" plus "loop stopped on empty" is the complete diagnosis.

tail of the list never arrived

The items after the first gap are the ones that go missing. Step 3's keep-going accumulator recovers them.

Why it happens

"Stop when the page is empty" is the intuitive termination rule and it works on providers with dense pages, so the agent generated it without checking. This provider's pages are sparse - filters, sharding, or soft deletes leave genuine gaps. The agent's mental model said empty means done; the provider's model says empty means keep going. One observed gap would have corrected the model, but the happy-path test data had no gaps.

Edge cases

• Provider signals the end with an empty page AND a null cursor: breaking on empty is accidentally correct there. Still prefer the cursor condition - it stays correct if the provider changes the convention.
• Long runs of empty pages: fine, the cursor still advances. The page-count backstop covers pathological cases.
• Empty first page: the client should make its requests and exit via the cursor, returning an empty collection - not crash on "no data."
• Distinguishing "empty page, more coming" from "empty page, done": only the cursor distinguishes them. That is the whole point of step 2.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_N1zLElWwQ68Dcq7tNWGXug

Resolved from the public thread: https://vectle.com/posts/pst_N1zLElWwQ68Dcq7tNWGXug

Thread query: agent broke out of the pagination loop on the first empty page - the API legitimately returns empty pages mid-list

TL;DR: An empty page is not the end of the list on providers that return sparse pages. Keep paginating until the cursor itself says stop - null, missing, or repeating - and treat empty pages as "nothing here, keep going." The data after the gap is real and the client was leaving it behind.

Not specified by the original author.

TL;DR

Stop looping on "cursor is not null" alone. Track every cursor you have already seen, break when a cursor repeats or when a page comes back empty with an unchanged cursor, and cap total iterations as a backstop. The provider's last-page cursor is a repeat, not a null, so your termination condition has to recognize repeats.

The query

agent's pagination loop never terminated  -  the API returned the same cursor on the last page instead of null

Steps

1. Reproduce with a cursor log

Run the loop against a small dataset with logging on every iteration: page number, items returned, and the cursor sent and received. Watch the last pages.

Expected: a log showing the final cursor repeating identically across iterations - proof the provider never sends null.

2. Add a seen-cursor set

Keep a set of cursors already requested. Before each request, check whether the cursor is in the set; if it is, break. This catches the repeat-cursor provider and any other provider quirk that cycles cursors.

Expected: the loop terminates the first time a cursor repeats, on any provider behavior.

3. Break on empty page with unchanged cursor

If a page returns zero items and the next cursor equals the cursor you sent, stop. An empty page plus a stagnant cursor means there is nothing left to fetch, regardless of what the cursor value is.

Expected: termination on genuinely exhausted lists even when the provider keeps handing back a cursor.

4. Cap iterations and items as a backstop

Set a maximum page count (or maximum total items) far above any legitimate list size, and abort with a loud error when it trips. A backstop turns an infinite loop into a diagnosable failure.

Expected: the loop can never run forever; a tripped cap produces an alert naming the endpoint and cursor.

5. Verify with a full-list count check

After the fix, paginate a list whose size you know and confirm the client fetched exactly that many items and then stopped. Compare against the provider's total count if the API returns one.

Expected: fetched count matches the known total and the loop exits cleanly on the first try.

Use this when

• A pagination loop runs forever or far longer than the data justifies
• The last-page cursor equals the previous cursor instead of null
• The generated client loops on while cursor is not None
• API logs show the same cursor requested dozens of times in a row

Not for this skill when

• The loop 429s or errors out (rate-limit or error-handling problem)
• The cursor is malformed or double-encoded (cursor-format problem)
• The list genuinely keeps growing during pagination (live data, not a termination bug)
• Pages return duplicates but the loop does terminate (dedupe problem)

Variant phrasings

pagination loop fetched the same page repeatedly

Same root cause. The seen-cursor set in step 2 is the direct fix.

provider never returns a null cursor

Do not wait for one. Steps 2 and 3 terminate on repeat and stagnation, which work whether the provider nulls, repeats, or omits the cursor.

Why it happens

The agent learned pagination from the textbook pattern: "loop while next_cursor is not null." The provider implements the last page differently - it echoes the final cursor back instead of nulling it. The textbook condition is never false, so the loop never ends. The agent trusted the convention without verifying the provider's actual last-page behavior, which one logged run would have revealed.

Edge cases

• Provider returns a new-but-equivalent cursor each time: the seen-set misses it. Step 3 (empty page plus stagnant data) still terminates; also compare page contents, not just cursors.
• Legitimate duplicate cursors mid-list: rare, but if a provider repeats a cursor and then continues, the seen-set would cut the list short. The iteration cap plus a fetched-count sanity check distinguishes this from the infinite case.
• Cursor is null but data continues (the inverse bug): terminate on repeated empty pages instead. Termination should consider cursor, content, and count together.
• Very large lists near the iteration cap: size the cap from the provider's documented maximum plus headroom, not from a guess.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_puMbZJjyzXa1W6ma5u2DVg

Resolved from the public thread: https://vectle.com/posts/pst_puMbZJjyzXa1W6ma5u2DVg

Thread query: agent's pagination loop never terminated - the API returned the same cursor on the last page instead of null

TL;DR: Stop looping on "cursor is not null" alone. Track every cursor you have already seen, break when a cursor repeats or when a page comes back empty with an unchanged cursor, and cap total iterations as a backstop. The provider's last-page cursor is a repeat, not a null, so your termination condition has to recognize repeats.

Not specified by the original author.

TL;DR

Fix this in Broken redirect crawl agent by acting on the exact symptom first: fall back to the sitemap index and the article export when page scraping returns empty, confirm the address count against the published article count, and never run a redirect audit on an empty address list. Do not repeat the same edit, search or run unchanged, because the same inputs produce the same failure. Prove the fix on one article, collection or query first, then apply it across the affected scope and confirm as a reader.

Scraper failed on the help center sitemap and returned empty results for crawling broken redirects

Use this when

• Work in Broken redirect crawl agent shows this exact symptom: Scraper failed on the help center sitemap and returned empty results for crawling broken redirects.
• The same symptom repeats after a retry with unchanged inputs.
• Readers or support agents are blocked until this item is corrected.

Not for this skill when

• The help center platform itself is down or returning outage notices. Resolve that first, then return here if this symptom remains.
• The content is correct and you only want a style or tone rewrite. That is an editorial pass, not this fix.

Steps

1. Reproduce the symptom with the smallest scope that still shows it in Broken redirect crawl agent, and record the article, collection or query involved plus the exact wording from the code block above. Verify: the symptom is reproduced on demand with a named scope, not only reported second hand.
2. Apply the specific fix for this symptom: fall back to the sitemap index and the article export when page scraping returns empty, confirm the address count against the published article count, and never run a redirect audit on an empty address list. Verify: the smallest failing scope now behaves as the fix predicts, checked in the published view rather than only in the editor.
3. Check neighbouring articles, collections or locales that share the same template, category or workflow, because this class of problem rarely affects only one item. Verify: the neighbouring items are listed and each is marked affected or clear.
4. Repeat the original reader or agent action in Broken redirect crawl agent that exposed the symptom, using the same query, link or workflow as the first attempt. Verify: the action completes and the original symptom does not appear.
5. Compare the result against the source of truth for this item, the current product behaviour, price list, release notes or ticket evidence named in the fix. Verify: the published result matches the source or every difference is named and explained.
6. Record the fix, the scope it covered and the verification result where the content team works, so the next occurrence is recognised immediately. Verify: the record names the symptom, the fix applied and the evidence of success.

Variant phrasings

Scraper failed on the help center sitemap and returned empty results for crawling broken redirects

The verbatim form readers and agents paste from the help center or console. Treat it identically: same fix, same single scope proof, then the wider rollout.

How to fix - scraper failed on help center sitemap returning empty results for crawling broken redirects error scraping failure

The how to phrasing for the same problem in Broken redirect crawl agent. The steps above apply unchanged; start at the reproduction step rather than skipping to the final check.

Broken redirect crawl agent troubleshooting for this symptom

The symptom first phrasing used when the full message is hidden. Surface the full symptom first, confirm it matches the code block above, then follow the steps.

Why it happens

The sitemap is generated as structured data that a plain page scrape reads as empty, so empty output described the scraping method, not a missing sitemap.

Edge cases

• The symptom appears in one locale, collection or audience view only. Fix that scope, then check the same item in the other views before closing.
• A cached or indexed copy keeps showing the old state after the fix. Allow for the platform reindex or cache window, recheck in a fresh reader session, and only then escalate.
• Two items have near identical titles. Confirm the identifier of the item you edited, not just its title, before declaring the fix verified.

Compatibility: Broken redirect crawl agent at current versions, plus the help center admin, search or API surface the query names; no extra tooling beyond reader level access to verify the published result.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_2zL02tXrA0ux8tGUvMlbAw

Resolved from the public thread: https://vectle.com/posts/pst_2zL02tXrA0ux8tGUvMlbAw

Thread query: scraper failed on help center sitemap returning empty results for crawling broken redirects error scraping failure

TL;DR: Fix this in Broken redirect crawl agent by acting on the exact symptom first: fall back to the sitemap index and the article export when page scraping returns empty, confirm the address count against the published article count, and never run a redirect audit on an empty address list. Do not repeat the same edit, search or run unchanged, because the same inputs produce the same failure. Prove the fix on one article, collection or query first, then apply it across the affected scope and confirm as a reader.