<observations>
Date: May 8, 2026
* 🟡 (12:14) Agent confirmed `is_transaction:true` filter returns 0 results in spans dataset — all variations tested (`is_transaction:true`, `is_transaction:1`, `is_transaction:yes`) return 0 spans
* 🟡 (12:14) Discover dataset with `event.type:transaction` still works and returns 33 transactions (same breakdown: services/24, resources/5, deep-link-login/2, account_requests/1, deep_links/1)
* 🟡 (12:14) `discover` widgetType rejected by API: "Attribute value `discover` is deprecated. Please use `error-events` or `transaction-like`"
* 🟡 (12:15) `transaction-like` widgetType also rejected: "The transactions dataset is being deprecated. Please use the spans dataset with the `is_transaction:true` filter instead." — circular dead end (spans+is_transaction returns 0, transactions dataset deprecated)
* 🟡 (12:15) Agent tested all 5 widgetType values: `spans`, `error-events`, `tracemetrics`, `metrics`, `issue` — all accepted the CLI syntax (title required error = valid type)
* 🟡 (12:15) Dashboard ID confirmed as numeric 4510068 (org: sentry, 590 total dashboards in org)
* 🟡 (12:15) Widget creation test results: `spans` widgetType works (add/remove succeeded), `error-events` widgetType works (add/remove succeeded), `tracemetrics` rejects `count()` aggregate as invalid
* 🟡 (12:16) Span op breakdown per transaction (spans dataset, 14d): deep-link-login has 3286 db spans; account_requests has 4120 db + 2060 http.client + 2060 view.response.render; resources has 4650 db + 3203 http.client + 2728 cache.get + 1602 base.dispatch.setup + 1126 base.dispatch.request; services has 775 ratelimit.__call__
* 🟡 (12:16) Discover dataset unique_events=1 for every transaction group — meaning each URL pattern maps to exactly 1 unique event type
* 🟡 (12:16) Dashboard rebuild strategy narrowed to two working widgetTypes: `spans` and `error-events` (discover deprecated, transaction-like deprecated, tracemetrics incompatible with count())
</observations>