45-45: Verify timing sensitivity with real-time sync.

The change to real-time sync looks good, but we should verify that the test remains reliable with potential timing differences.

Let's check for similar tests that might need timing verification:

96-102: ⚠️ Potential issue

Enhance error handling and observability for publish timeouts.

The current implementation silently drops events on timeout, which could be problematic especially in the new batch publishing context. Consider:

1. Adding logging when timeouts occur
2. Exposing metrics for monitoring publish timeouts
3. Implementing a retry mechanism or buffering strategy

 select {
 case s.Events() <- event:
     return true
 case <-gotime.After(publishTimeout):
+    log.Warnf("Timeout publishing event to subscriber %s: %v", s.subscriber, event)
+    metrics.PublishTimeouts.Inc()
     return false
 }

Let's check if there are any existing timeout handling patterns in the codebase:

#!/bin/bash
# Search for similar timeout patterns and logging
rg -A 2 "time.After|Timeout" --type go

96-102: Verify integration with BatchPublisher.

Since this is part of the new batch publishing feature, we should ensure that the timeout handling aligns with the BatchPublisher's behavior. Consider:

1. Whether the BatchPublisher needs to be aware of these timeouts
2. If the 100ms timeout is appropriate for batch operations
3. How this affects the "redundant events" problem mentioned in the PR objectives

Let's examine the BatchPublisher implementation:

#!/bin/bash
# Look for BatchPublisher implementation
ast-grep --pattern 'type BatchPublisher struct {
  $$$
}'

#!/bin/bash
# Look for BatchPublisher methods and usage
ast-grep --pattern 'func ($_ *BatchPublisher) $$$'

# Search for timeout related configurations
rg "timeout|window" -A 3 server/backend/sync/memory/publisher.go

#!/bin/bash
# Look for publish/event handling in BatchPublisher
rg -A 10 "func.*BatchPublisher.*Publish" server/backend/sync/memory/publisher.go

# Check the subscription timeout configuration
rg "publishTimeout|timeout.*=" server/backend/sync/

#!/bin/bash
# Look for the event processing and delivery logic
rg -A 15 "processLoop|deliver" server/backend/sync/memory/publisher.go

# Check if there are any other timeout configurations in the subscription logic
rg -A 3 "func.*Subscribe|Events\(\)" server/backend/sync/

31-38: LGTM: Thread-safe logger ID generation

The implementation correctly uses atomic operations to ensure thread-safe ID generation.

89-89: LGTM: Real-time sync option aligns with the new BatchPublisher feature.

The addition of client.WithRealtimeSync() correctly implements the transition from manual to real-time synchronization as part of the BatchPublisher feature.

Line range hint 89-108: Verify if explicit sync is still necessary with real-time synchronization.

With the introduction of real-time synchronization, the explicit sync call after receiving the document change event might be redundant:

if resp.Type == client.DocumentChanged {
    err := c1.Sync(ctx, client.WithDocKey(d1.Key()))  // Is this still needed?
    assert.NoError(t, err)
    return
}

Let's verify the sync behavior in the codebase:

205-205: LGTM: Real-time sync enabled for first client.

The addition of client.WithRealtimeSync() aligns with the PR's objective of implementing batch publishing for events.

215-215: LGTM: Real-time sync enabled for second client.

The addition of client.WithRealtimeSync() maintains consistency with the first client's configuration.

Line range hint 205-215: Verify benchmark coverage for batch publishing.

While the real-time sync is properly enabled, we should ensure the benchmark adequately tests the new batch publishing functionality.

Consider adding specific benchmark cases to measure:

1. Performance under high-frequency event publishing
2. Impact of different batch window sizes
3. Lock contention scenarios

Would you like me to help draft additional benchmark test cases?

177-177: LGTM: Test maintains authentication verification while adopting real-time sync.

The change from manual to real-time synchronization aligns with the broader PR changes introducing BatchPublisher, while preserving the test's core purpose of verifying authentication behavior for document attachment.

Let's verify that this test still effectively catches authentication failures:

#!/bin/bash
# Description: Verify that the test properly handles authentication failures
# by checking for appropriate error handling patterns

# Test: Look for authentication error assertions
rg -A 2 "connect\.CodeUnauthenticated.*connect\.CodeOf\(err\)" test/integration/auth_webhook_test.go

#!/bin/bash
# Get the context around the modified Attach call to verify error handling
rg -B 5 -A 5 "cli\.Attach\(ctx, doc, client\.WithRealtimeSync\(\)\)" test/integration/auth_webhook_test.go

Line range hint 340-344: Breaking Change: Document synchronization behavior modified

The change from IsManual to IsRealtime aligns with the PR objective of implementing batch publishing. However, this is a breaking change that modifies how document synchronization is initiated.

Let's verify the impact on existing clients:

176-176: LGTM: Watch document changed event test properly configured with real-time sync.

The test correctly uses WithRealtimeSync() for both documents to ensure real-time propagation of changes.

Also applies to: 180-180

434-434: LGTM: Document removal test properly handles real-time sync.

The test correctly uses WithRealtimeSync() to ensure proper cleanup of watchers during document removal.

459-459: LGTM: Broadcast test properly configured with real-time sync.

The test correctly uses WithRealtimeSync() for all three documents to ensure real-time propagation of broadcast events.

Also applies to: 465-465, 471-471

521-521: LGTM: Unsubscribe test properly handles real-time sync.

The test correctly uses WithRealtimeSync() to verify that unsubscribed clients don't receive broadcasts in real-time.

Also applies to: 527-527

579-579: LGTM: Unsubscriber broadcast test properly configured.

The test correctly uses WithRealtimeSync() to verify that unsubscribed clients can still broadcast events.

Also applies to: 586-586

625-625: LGTM: Unserializable payload test properly configured.

The test correctly uses WithRealtimeSync() to verify payload validation in real-time sync mode.

648-648: LGTM: Error handling test properly configured.

The test correctly uses WithRealtimeSync() to verify error propagation during real-time sync.

Also applies to: 654-654

732-732: LGTM: Cross-project test properly configured.

The test correctly uses WithRealtimeSync() to verify document isolation between different projects in real-time sync mode.

Also applies to: 771-771, 784-784

150-150: Ensure thread safety when closing subscriptions

Calling subs.Close() within the Delete callback might lead to concurrency issues if other goroutines are accessing subs. Verify that this operation is thread-safe.

Consider reviewing synchronization mechanisms around subs.Close().

181-181: Confirm subscribers receive events correctly after batching

With the introduction of batching, ensure that events are dispatched to subscribers as expected and that there are no delays or missed notifications.

Would you like assistance in writing tests to validate the new batching behavior?

59-60: Update all calls to the modified Publish method

Ensure that all invocations of Publish reflect the new signature without the context parameter.

Run the following script to find any outdated calls:

214-223: Ensure proper cleanup and synchronization in the new test case.

The new "watch after attach events test" case follows the established pattern of creating clients, attaching documents, and cleaning up resources using defer statements. The usage of client.WithRealtimeSync() aligns with the real-time synchronization approach.

224-256: Verify the behavior of the new "watch after attach events test" case.

The test case sets up a goroutine to handle document events and waits for a specific event using wgEvents. The logic for handling events, timeouts, and unexpected stream closures is consistent with other test cases.

258-271: Confirm the expected behavior in the new test case.

The test case expects a DocumentWatched event with the presence of c2 after c1 syncs the changes related to c2's attachment. The expected slice is populated accordingly, and the received events are compared against it using assert.Equal.

274-333: Ensure proper cleanup and synchronization in the new "attach after watch events test" case.

The new test case follows the established pattern of creating clients, attaching documents, and cleaning up resources using defer statements. The usage of client.WithRealtimeSync() aligns with the real-time synchronization approach.

The test case sets up a goroutine to handle document events and waits for a specific event using wgEvents. The logic for handling events, timeouts, and unexpected stream closures is consistent with other test cases.

The expected behavior is defined by populating the expected slice with a DocumentWatched event and the presence of c2. The received events are compared against the expected events using assert.Equal.

340-343: Verify the usage of client.WithRealtimeSync() in the modified test case.

The addition of client.WithRealtimeSync() in the Attach calls enables real-time synchronization for the clients in the "unwatch after detach events test" case. This change aligns with the overall shift towards real-time synchronization mentioned in the AI-generated summary.

Line range hint 370-390: Ensure proper synchronization and event handling in the modified test case.

The modifications in the "unwatch after detach events test" case include the addition of wgEvents.Done() to signal the completion of event handling and wgEvents.Wait() to wait for the expected events before proceeding with assertions. These changes enhance the reliability of the test by ensuring that the expected events are captured before making assertions.

406-407: Verify the synchronization and event handling in the modified test case.

The addition of wgEvents.Wait() ensures that the test waits for the expected events to be captured before proceeding with the assertion. This change enhances the reliability of the test by preventing premature assertions.

429-432: Confirm the usage of client.WithRealtimeSync() in the modified test case.

The addition of client.WithRealtimeSync() in the Attach calls enables real-time synchronization for the clients in the "detach after unwatch events test" case. This change aligns with the overall shift towards real-time synchronization mentioned in the AI-generated summary.

459-460: Verify the synchronization and event handling in the modified test case.

The addition of wgEvents.Done() signals the completion of event handling, allowing the test to proceed with assertions. This change enhances the reliability of the test by ensuring that the expected events are captured before making assertions.

478-479: Confirm the synchronization and event handling in the modified test case.

The addition of wgEvents.Wait() ensures that the test waits for the expected events to be captured before proceeding with the next step. This change enhances the reliability of the test by preventing premature execution of subsequent code.

495-496: Verify the synchronization and event handling in the modified test case.

The addition of wgEvents.Wait() ensures that the test waits for the expected events to be captured before proceeding with the next step. This change enhances the reliability of the test by preventing premature execution of subsequent code.

514-578: Ensure proper cleanup, synchronization, and event handling in the new "watch after update events test" case.

The new test case follows the established pattern of creating clients, attaching documents, and cleaning up resources using defer statements. The usage of client.WithRealtimeSync() aligns with the real-time synchronization approach.

The test case sets up a goroutine to handle document events and waits for a specific event using wgEvents. The logic for handling events, timeouts, and unexpected stream closures is consistent with other test cases.

The expected behavior is defined by populating the expected slice with a DocumentWatched event and the updated presence of c2. The received events are compared against the expected events using assert.Equal.

580-636: Verify the behavior and synchronization in the new "watch after detach events test" case.

The new test case follows the established pattern of creating clients, attaching documents, and cleaning up resources using defer statements. The usage of client.WithRealtimeSync() aligns with the real-time synchronization approach.

The test case sets up a goroutine to handle document events and uses wgEvents to control the test flow. The logic for handling events, timeouts, and unexpected events is consistent with other test cases.

The test case verifies that no presence events are received after c2 detaches from the document and c1 syncs the changes. The assertion assert.Equal(t, 0, len(responsePairs)) ensures that no unexpected events are captured.

Line range hint 646-693: Confirm the behavior and synchronization in the modified "watching multiple documents test" case.

The modifications in the test case include the addition of client.WithRealtimeSync() in the Attach calls, aligning with the real-time synchronization approach.

The test case sets up a goroutine to handle document events and uses wgEvents to control the test flow. The logic for handling events, timeouts, and unexpected stream closures is consistent with other test cases.

The expected behavior is defined by populating the expected slice with DocumentWatched and DocumentUnwatched events and the corresponding presences. The received events are compared against the expected events using assert.Equal.

131-133: Verify the usage of client.WithRealtimeSync() in the codebase.

The addition of client.WithRealtimeSync() in the Attach calls enables real-time synchronization for the clients. This change aligns with the introduction of the BatchPublisher and the shift towards real-time synchronization mentioned in the AI-generated summary.

To ensure that this option is used consistently across the codebase, run the following script:

#!/bin/bash
# Description: Verify the usage of `client.WithRealtimeSync()` in `Attach` calls.

# Test: Search for `Attach` calls without `client.WithRealtimeSync()`. 
# Expect: No occurrences found (empty output).
rg --type go --glob '!test/integration/presence_test.go' $'Attach\(ctx, [^,]+\)' 

#!/bin/bash
# Search for the definition and usage of WithRealtimeSync
rg --type go "WithRealtimeSync"

#!/bin/bash
# Get the implementation of WithRealtimeSync and its usage in the client package
ast-grep --pattern 'func WithRealtimeSync() AttachOption {
  $$$
}'