Wrap opaque string checkpoints for RxDB; restart on refusal.

Signed-off-by: Dmitri Zagidulin <dzagidulin@gmail.com>

Author: dmitrizagidulin

AGENTS.md

@@ -21,11 +21,11 @@ change that puts an `rxdb` import (a type import included) anywhere the root
 entry reaches breaks the contract, and `test/packaging/` is what catches it.
 
 What does NOT belong here: WAS HTTP, the sync port, the wire vocabulary, the
-error classes, and the four `err.name` predicates (`@interop/was-client`, its
-`/sync` subpath); the last-write-wins comparison rule (`@interop/social-core`);
-ciphers, key epochs, and any other key handling (`@interop/was-client/edv` and
-each consuming app); the session gates, the status store, and the platform
-wiring (each app's binding); and the replica-less change engine
+error classes, and the `err.name` predicates (`@interop/was-client`, its `/sync`
+subpath); the last-write-wins comparison rule (`@interop/social-core`); ciphers,
+key epochs, and any other key handling (`@interop/was-client/edv` and each
+consuming app); the session gates, the status store, and the platform wiring
+(each app's binding); and the replica-less change engine
 (`@interop/wallet-core/sync`), which is this driver's sibling rather than its
 other half.
 
@@ -266,7 +266,7 @@ rather than memory; check with the user before editing anything in them.
 
 - [was-client](https://github.com/interop-alliance/was-client) -- the WAS HTTP
   client, the sync port this driver runs on, the wire vocabulary, the error
-  classes, and the four `err.name` predicates.
+  classes, and the `err.name` predicates.
 - [was-react](https://github.com/interop-alliance/was-react) and the Freewallet
   browser wallet -- the two consumers, and the two copies this package was
   merged from.

CHANGELOG.md

@@ -12,13 +12,13 @@
   persisted with the retired object record reads as no checkpoint and pulls from
   the beginning. `createWasReplication` returns
   `RxReplicationState<SyncedDoc, ReplicationCheckpoint>`. Requires
-  `@interop/was-client` 0.84.0 or later.
-- The pull handler restarts the feed from the beginning when the server refuses
-  the stored checkpoint with `invalid-request-body` (400) at `#/checkpoint`, as
-  for a checkpoint issued by another server. A 400 of that type pointing
-  elsewhere is rethrown. The refused checkpoint is remembered for the life of
-  the handler, so an empty restarted feed (which RxDB does not persist a
-  checkpoint for) costs the 400 round trip once rather than once per poll.
+  `@interop/was-client` 0.85.0 or later.
+- The pull handler restarts the feed from the beginning when the port raises its
+  refused-checkpoint signal (`isSyncCheckpointError`), as for a checkpoint
+  issued by another server. Every other pull failure is rethrown. The refused
+  checkpoint is remembered for the life of the handler, so an empty restarted
+  feed (which RxDB does not persist a checkpoint for) costs the 400 round trip
+  once rather than once per poll.
 
 ## 0.6.0 - 2026-09-28
 

package.json

@@ -57,7 +57,7 @@
     "@eslint/js": "^10.0.1",
     "@interop/ed25519-verification-key": "^8.2.1",
     "@interop/logger": "^0.2.0",
-    "@interop/was-client": "^0.84.0",
+    "@interop/was-client": "^0.85.0",
     "@playwright/test": "^1.60.0",
     "@types/node": "^26.0.1",
     "@vitest/coverage-v8": "^4.1.7",
@@ -74,7 +74,7 @@
     "was-teaching-server": "link:../was-teaching-server"
   },
   "peerDependencies": {
-    "@interop/was-client": ">=0.84.0 <1.0.0",
+    "@interop/was-client": ">=0.85.0 <1.0.0",
     "rxdb": "^17.0.0"
   },
   "peerDependenciesMeta": {