@@ -54,15 +54,19 @@
  *    `config_change` row stored before its writer recorded the settings row,
  *    an auth event that carried no session id, and an `action_invocation` row
  *    of an action invoked with no subject record.
- *    There is no record to judge, and none carries a record's field values
- *    (the per-writer measurement in `audit-log-field-redaction.ts`), so they
- *    are OUTSIDE this gate's class and are served under the ledger's own grant
+ *    There is no record to judge, so they are OUTSIDE this gate's class and
+ *    are served under the ledger's own grant
  *    exactly as before — through a predicate on the ledger's own columns
  *    ({@link ledgerRowAboutNoRecordWhere}), so a broad read is served whole. This is where the ledger differs from the activity
  *    stream, which excludes every row naming no parent: the stream has no
  *    platform producer of such rows, while these have three, and the shipped
  *    `config_changes` list view reads `import` rows (and the older
  *    `config_change` rows) through the data door.
+ *    The field-level redaction does not key on `record_id`: a `config_change`
+ *    row naming a settings store as `object_name` carries that setting's
+ *    `value` (readable for a non-secret key) and `digest`, and both are
+ *    dropped for a reader whose field-level security masks the store's
+ *    `value` (`audit-log-field-redaction.ts`), with or without a `record_id`.
  *  - **A record action that names no record** — a `create` / `read` / `update`
  *    / `delete` row with no `record_id` (the CRUD mirror stamps `null` when it
  *    cannot derive the id): about a record the gate cannot name, so excluded
 
@@ -275,8 +275,10 @@ export class AuditPlugin implements Plugin {
       namespace: 'sys',
       objects: [SysAuditLog, SysActivity, SysComment, SysCommentReaction],
       // The ledger row's record page: its fields, and every ledger row about
-      // the same record beside it, so a `config_change` row's digest sits next
-      // to the mirror's row that carries the value (`sys-audit-log.page.ts`).
+      // the same record beside it, so a `config_change` row sits next to the
+      // mirror's rows about the same settings row (`sys-audit-log.page.ts`).
+      // A non-secret key's `config_change` row carries its readable before
+      // and after itself; a secret-valued key's carries only the digest.
       pages: [SysAuditLogDetailPage],
       // ADR-0029 D7 — contribute the one Audit Log entry into the Setup app's
       // `group_diagnostics` slot. The plugin owns sys_audit_log (K2), so the
 
@@ -11,16 +11,17 @@ import type { Page } from '@objectstack/spec/ui';
  *
  * ## Why the page exists: the other rows about the same record
  *
- * A settings write records a `config_change` row whose `new_value` is a
- * DIGEST, never the value (`service-settings`' `config-change-audit.ts`), so
- * the row alone cannot answer "what was it changed to". The CRUD mirror
+ * A settings write records a `config_change` row whose `old_value` and
+ * `new_value` carry the setting's readable before and after for a key that
+ * is not secret-valued, and only its digest for a secret-valued key
+ * (`service-settings`' `config-change-audit.ts`). The CRUD mirror
  * (`audit-writers.ts`) writes its own row about the same write, on the stored
- * settings row, and that row carries the change: a non-secret value's old and
- * new state, a secret's only as the mirror's ledger view masks it. Both rows
- * name the same settings row as `record_id` (the `config_change` writer
- * records the id of the row the write landed on), so this page lists every
- * ledger row whose `record_id` is this row's: the `config_change` row and the
- * mirror's rows sit side by side, and the value is one row down.
+ * settings row: a non-secret value's old and new state, a secret's only as
+ * the mirror's ledger view masks it. Both rows name the same settings row as
+ * `record_id` (the `config_change` writer records the id of the row the write
+ * landed on), so this page lists every ledger row whose `record_id` is this
+ * row's: the `config_change` row and the mirror's rows sit side by side, the
+ * history of that settings row in one list.
  *
  * The list is the ledger itself, keyed on the pointer's id half on both sides
  * (`relationshipField` and `relationshipValueField` both `record_id`): the