diff --git a/headless/SERVICE_ACCEPTANCE.md b/headless/SERVICE_ACCEPTANCE.md
index 8ed5ee3..e395ed7 100644
--- a/headless/SERVICE_ACCEPTANCE.md
+++ b/headless/SERVICE_ACCEPTANCE.md
@@ -22,7 +22,7 @@ the complete Draft acceptance matrix, main integration or production deployment.
 | Requirement | Authoritative entry and observed assertion |
 | --- | --- |
 | Explicit identity migration | `TestCanonicalModelMigrationAndIncrementalLifecycle`: GET does not migrate; retry returns the same identity map; implicit partitions become owning canvases; old snapshot writers are rejected. The real Node consumer also migrates and retries. |
-| Migration admission and late rollback | `TestCanonicalMigrationPermissionVersionAndRunGuards` checks viewer denial, stale source versions, queued/running work and stable negative receipts after conditions change. `TestCanonicalMigrationLateCancellationRollsBack` observes the actual identity-map INSERT blocked after canonical/material/subgraph writes, cancels it, then checks all related rows, source bytes and version before retrying the original key successfully. |
+| Migration admission and late rollback | `TestCanonicalMigrationPermissionVersionAndRunGuards` checks viewer denial, stale source versions, queued/running work and stable negative receipts after conditions change. `TestCanonicalMigrationLateCancellationRollsBack` observes the actual identity-map INSERT blocked after canonical/material/subgraph writes, cancels it, then checks all related rows, original legacy JSON and version before retrying the original key successfully. |
 | Incremental writes and receipt identity | `TestCanonicalModelMigrationAndIncrementalLifecycle` verifies exact retries, unknown receipt semantics, logical ID coverage, participant versions, and zero writes/logical-ID consumption after a later batch condition fails. It checks canonical DB rows, not just HTTP status. |
 | Canonical concurrent writers | `TestCanonicalConcurrentMigrationAndOwnershipWrites` races four identical migrations, then four identical edits, requiring identical receipts and one version advance. Two different requests then compete to move alternate endpoints and their common edge: exactly one wins, the loser has a queryable terminal version-conflict receipt, both canvas versions advance once, and the full ownership graph remains valid. Reusing the winning key with changed bytes is rejected without changing the model. |
 | Real frontend coordination | `TestHeadlessClientHTTPIntegration` runs `tests/headless/foundry.integration.mjs` against authenticated HTTP and PostgreSQL. It verifies lost document ACK recovery without duplicate POST, atomic partition edits, deep copy with a parent-owned incoming edge, partial import and old stream-tail coordination. |