diff --git a/.agents/skills/inkreach-teable/api-reference/trigger-types.md b/.agents/skills/inkreach-teable/api-reference/trigger-types.md
index 3c6c116..5d98501 100644
--- a/.agents/skills/inkreach-teable/api-reference/trigger-types.md
+++ b/.agents/skills/inkreach-teable/api-reference/trigger-types.md
@@ -61,10 +61,11 @@ inkreach-teable trigger set <wfId> --type recordUpdated --table-id tblXXX \
 - ⚠️ **Key is `fieldIds`, NOT `watchFieldIds`.**
 - ⚠️ recordUpdated **ignores `conditions`** — use `recordCondition` if you need filtering.
 
-**Output:** `record.id`, `record.fields.*` (post-update values), `record.oldFields.*` (pre-update values, field-ID keys), `user`, `tableId`, `changedFieldIds` (array of field IDs whose value changed).
+**Output:** `record.id`, `record.fields.*` (post-update values), `oldFields.*` (pre-update values, field-ID keys), `user`, `tableId`, `changedFieldIds` (array of field IDs whose value changed).
 
 **changedFieldIds / oldFields semantics** (delivered on both v1 and v2 API update paths):
 - `oldFields` = full pre-update field snapshot keyed by field ID; `changedFieldIds` = deep-equal diff of before/after snapshots.
+- ⚠️ **`oldFields` is TOP-LEVEL** (`triggerInput.oldFields.fldXXX`), a sibling of `record` — NOT nested inside `record`. Script access: `triggerInput.oldFields?.['fldXXX']`; variable reference: `{{n0.oldFields.fldXXX}}`.
 - `fieldIds` watch-filter matches against `changedFieldIds`.
 - On batch mode (`_batch`), each `records[]` entry carries its own `changedFieldIds` + `oldFields`.
 - ⚠️ **Fires on REST API record updates only** (`PATCH /api/table/{tableId}/record[/{recordId}]`, including programmatic/automation writes). Browser grid cell edits go through ShareDB ops and do **not** fire this trigger.
@@ -103,7 +104,7 @@ inkreach-teable trigger set <wfId> --type recordCondition --table-id tblXXX \
 ```
 Common operators: `is`, `isNot`, `isEmpty`, `isNotEmpty`, `isAnyOf`, `isNoneOf`, `contains`, `isGreater`, `isLess`, `isAfter`, `isBefore`.
 
-**Output:** `record.id`, `record.fields.*`, `user`, `tableId`; on update events also `record.oldFields.*` + `changedFieldIds` (see §2 semantics).
+**Output:** `record.id`, `record.fields.*`, `user`, `tableId`; on update events also top-level `oldFields.*` + `changedFieldIds` (see §2 semantics).
 
 ---
 
@@ -122,7 +123,7 @@ inkreach-teable trigger set <wfId> --type recordCreatedOrUpdated --table-id tblX
 - Ignores `fieldIds` (watches all fields).
 - `conditions` optional.
 
-**Output:** same as recordCreated; on update events also `record.oldFields.*` + `changedFieldIds` (see §2 semantics).
+**Output:** same as recordCreated; on update events also top-level `oldFields.*` + `changedFieldIds` (see §2 semantics).
 
 ---