fix(rails): update pinned Ruby SDK to 3.26.2

[dustinbyrne]

💡 Motivation and Context

The latest published posthog-rails (3.18.6) requires exactly posthog-ruby 3.23.7, preventing Rails users from receiving newer core SDK fixes and features. The latest core SDK is 3.26.2.

Add a Rails-only patch changeset. The Rails gemspec already derives its exact Ruby dependency from the core version in the release commit, so publishing a new Rails version updates the pin without changing the gemspec or releasing Ruby again.

💚 How did you test it?

• pnpm changeset status: only posthog-rails selected for a patch release.
• Simulated pnpm changeset version and ./scripts/bump-version.sh in a disposable copy: Rails becomes 3.18.7; Ruby remains 3.26.2.
• Built the simulated Rails gem and inspected its packaged specification: posthog-ruby = 3.26.2.
• bundle exec rspec: 1,253 examples, 0 failures, 2 optional OpenTelemetry integration tests pending.
• Ran those two integration tests with BUNDLE_GEMFILE=gemfiles/otel.gemfile: 2 examples, 0 failures.
• bundle exec rubocop: 129 files, no offenses.
• bundle exec rake public_api:check: passed.

📝 Checklist

• I reviewed the submitted code.
• Added a Rails patch changeset.

🤖 Agent context

Autonomy: Human-driven (agent-assisted)

Implemented with pi using Git, Changesets, Ruby/Bundler, and GitHub CLI. A fresh, read-only pi reviewer inspected the change and found no issues.

[github-actions]

posthog-ruby-sync Compliance Report

Date: 2026-10-07T18:26:50.918661+00:00
Duration: 94133ms

⚠️ Some Tests Failed

45/47 tests passed, 2 failed

---

Capture Tests

⚠️ 29/30 tests passed, 1 failed

View Details

Test	Status	Duration
Format Validation.Event Has Required Fields	✅	10ms
Format Validation.Event Has Uuid	✅	7ms
Format Validation.Event Has Lib Properties	✅	7ms
Format Validation.Distinct Id Is String	✅	9ms
Format Validation.Token Is Present	✅	7ms
Format Validation.Custom Properties Preserved	✅	6ms
Format Validation.Event Has Timestamp	✅	7ms
Format Validation.Non Utc Event Timestamp Is Converted To Utc	✅	6ms
Retry Behavior.Retries On 503	✅	5239ms
Retry Behavior.Does Not Retry On 400	✅	2012ms
Retry Behavior.Does Not Retry On 401	✅	2011ms
Retry Behavior.Respects Retry After Header	✅	8017ms
Retry Behavior.Implements Backoff	✅	15372ms
Retry Behavior.Retries On 500	✅	5117ms
Retry Behavior.Retries On 502	✅	5147ms
Retry Behavior.Retries On 504	✅	5162ms
Retry Behavior.Max Retries Respected	✅	15540ms
Deduplication.Generates Unique Uuids	✅	20ms
Deduplication.Preserves Uuid On Retry	✅	5113ms
Deduplication.Preserves Uuid And Timestamp On Retry	✅	10279ms
Deduplication.Preserves Uuid And Timestamp On Batch Retry	✅	5161ms
Deduplication.No Duplicate Events In Batch	✅	19ms
Deduplication.Different Events Have Different Uuids	✅	9ms
Compression.Sends Gzip When Enabled	✅	6ms
Batch Format.Uses Proper Batch Structure	✅	6ms
Batch Format.Flush With No Events Sends Nothing	✅	4ms
Batch Format.Multiple Events Batched Together	❌	22ms
Error Handling.Does Not Retry On 403	✅	2009ms
Error Handling.Does Not Retry On 413	✅	2008ms
Error Handling.Retries On 408	✅	5153ms

Failures

batch_format.multiple_events_batched_together

Expected 1 requests, got 5

Feature_Flags Tests

⚠️ 16/17 tests passed, 1 failed

View Details

Test	Status	Duration
Request Payload.Request With Person Properties Device Id	✅	8ms
Request Payload.Flags Request Uses V2 Query Param	✅	7ms
Request Payload.Flags Request Hits Flags Path Not Decide	✅	7ms
Request Payload.Flags Request Omits Authorization Header	✅	7ms
Request Payload.Token In Flags Body Matches Init	✅	6ms
Request Payload.Groups Round Trip	✅	7ms
Request Payload.Groups Default To Empty Object	✅	7ms
Request Payload.Disable Geoip False Propagates As Geoip Disable False	✅	7ms
Request Payload.Disable Geoip Omitted Defaults To False	❌	7ms
Request Payload.Flag Keys To Evaluate Contains Only Requested Key	✅	7ms
Request Lifecycle.No Flags Request On Init Alone	✅	2ms
Request Lifecycle.No Flags Request On Normal Capture	✅	7ms
Request Lifecycle.Two Flag Calls Produce Two Remote Requests	✅	9ms
Request Lifecycle.Mock Response Value Is Returned To Caller	✅	7ms
Retry Behavior.Retries Flags On 502	✅	112ms
Retry Behavior.Retries Flags On 504	✅	113ms
Side Effect Events.Get Feature Flag Captures Feature Flag Called Event	✅	10ms

Failures

request_payload.disable_geoip_omitted_defaults_to_false

Field 'geoip_disable' not found in /flags request body at path 'geoip_disable'. Available keys: ['distinct_id', 'groups', 'person_properties', 'group_properties', 'flag_keys_to_evaluate', 'token']

[github-actions]

posthog-ruby-async Compliance Report

Date: 2026-10-07T18:27:10.999375+00:00
Duration: 98242ms

⚠️ Some Tests Failed

46/47 tests passed, 1 failed

---

Capture Tests

✅ 30/30 tests passed

View Details

Test	Status	Duration
Format Validation.Event Has Required Fields	✅	10ms
Format Validation.Event Has Uuid	✅	106ms
Format Validation.Event Has Lib Properties	✅	109ms
Format Validation.Distinct Id Is String	✅	107ms
Format Validation.Token Is Present	✅	107ms
Format Validation.Custom Properties Preserved	✅	106ms
Format Validation.Event Has Timestamp	✅	106ms
Format Validation.Non Utc Event Timestamp Is Converted To Utc	✅	9ms
Retry Behavior.Retries On 503	✅	5311ms
Retry Behavior.Does Not Retry On 400	✅	2109ms
Retry Behavior.Does Not Retry On 401	✅	2109ms
Retry Behavior.Respects Retry After Header	✅	8117ms
Retry Behavior.Implements Backoff	✅	15517ms
Retry Behavior.Retries On 500	✅	5212ms
Retry Behavior.Retries On 502	✅	5212ms
Retry Behavior.Retries On 504	✅	5212ms
Retry Behavior.Max Retries Respected	✅	15615ms
Deduplication.Generates Unique Uuids	✅	114ms
Deduplication.Preserves Uuid On Retry	✅	5211ms
Deduplication.Preserves Uuid And Timestamp On Retry	✅	10318ms
Deduplication.Preserves Uuid And Timestamp On Batch Retry	✅	5215ms
Deduplication.No Duplicate Events In Batch	✅	111ms
Deduplication.Different Events Have Different Uuids	✅	108ms
Compression.Sends Gzip When Enabled	✅	107ms
Batch Format.Uses Proper Batch Structure	✅	107ms
Batch Format.Flush With No Events Sends Nothing	✅	5ms
Batch Format.Multiple Events Batched Together	✅	112ms
Error Handling.Does Not Retry On 403	✅	2109ms
Error Handling.Does Not Retry On 413	✅	2109ms
Error Handling.Retries On 408	✅	5209ms

Feature_Flags Tests

⚠️ 16/17 tests passed, 1 failed

View Details

Test	Status	Duration
Request Payload.Request With Person Properties Device Id	✅	108ms
Request Payload.Flags Request Uses V2 Query Param	✅	106ms
Request Payload.Flags Request Hits Flags Path Not Decide	✅	107ms
Request Payload.Flags Request Omits Authorization Header	✅	107ms
Request Payload.Token In Flags Body Matches Init	✅	108ms
Request Payload.Groups Round Trip	✅	107ms
Request Payload.Groups Default To Empty Object	✅	108ms
Request Payload.Disable Geoip False Propagates As Geoip Disable False	✅	107ms
Request Payload.Disable Geoip Omitted Defaults To False	❌	107ms
Request Payload.Flag Keys To Evaluate Contains Only Requested Key	✅	107ms
Request Lifecycle.No Flags Request On Init Alone	✅	4ms
Request Lifecycle.No Flags Request On Normal Capture	✅	106ms
Request Lifecycle.Two Flag Calls Produce Two Remote Requests	✅	114ms
Request Lifecycle.Mock Response Value Is Returned To Caller	✅	108ms
Retry Behavior.Retries Flags On 502	✅	239ms
Retry Behavior.Retries Flags On 504	✅	258ms
Side Effect Events.Get Feature Flag Captures Feature Flag Called Event	✅	109ms

Failures

request_payload.disable_geoip_omitted_defaults_to_false

Field 'geoip_disable' not found in /flags request body at path 'geoip_disable'. Available keys: ['distinct_id', 'groups', 'person_properties', 'group_properties', 'flag_keys_to_evaluate', 'token']