feat: introduce Transcript debug module

[xepozz]

What was changed

• Added a new module that allows to
  • Track incoming and outgoing messages
  • Track raised errors and workers
  • Track workflow history when fail

In compact mode it shows that all transcripts are available in the runtime directory:

[2026-05-26 13:38:18] error: transcript {"path":"\/Users\/xepozz\/IdeaProjects\/temporalio\/runtime\/tests\/transcripts\/20260526-133812-43a7\/test__pid92945__1779802692894.log"}
[2026-05-26 13:38:18] info: view merged transcript: less /Users/xepozz/IdeaProjects/temporalio/runtime/tests/transcripts/20260526-133812-43a7/_merged/transcript.log

If we open the file or pass TEMPORAL_TRANSCRIPT_DUMP_ON_FAIL=1 ENV when run the test we'll see the following:

Details

{"ts":"2026-05-26T14:49:53.042693+00:00","pid":1345,"seq":1,"section":"META","attributes":{"event":"writer_initialized","path":"/Users/xepozz/IdeaProjects/temporalio/runtime/tests/transcripts/20260526-144953-4e13/test__pid1345__1779806993042.log","worker_start_epoch_ms":1779806993042}}
{"ts":"2026-05-26T14:49:53.594764+00:00","pid":1375,"seq":1,"section":"META","attributes":{"event":"writer_initialized","path":"/Users/xepozz/IdeaProjects/temporalio/runtime/tests/transcripts/20260526-144953-4e13/worker__pid1375__1779806993594.log","worker_start_epoch_ms":1779806993594}}
{"ts":"2026-05-26T14:49:53.594817+00:00","pid":1374,"seq":1,"section":"META","attributes":{"event":"writer_initialized","path":"/Users/xepozz/IdeaProjects/temporalio/runtime/tests/transcripts/20260526-144953-4e13/worker__pid1374__1779806993594.log","worker_start_epoch_ms":1779806993594}}
{"ts":"2026-05-26T14:49:53.595135+00:00","pid":1374,"seq":2,"section":"META","attributes":{"event":"fatal_handler_registered","pid":1374}}
{"ts":"2026-05-26T14:49:53.595136+00:00","pid":1375,"seq":2,"section":"META","attributes":{"event":"fatal_handler_registered","pid":1375}}
{"ts":"2026-05-26T14:49:53.777123+00:00","pid":1374,"seq":3,"section":"META","attributes":{"event":"host_recording_started","inner":"Temporal\\Worker\\Transport\\RoadRunner","pid":1374,"transcript_path":"/Users/xepozz/IdeaProjects/temporalio/runtime/tests/transcripts/20260526-144953-4e13/worker__pid1374__1779806993594.log"}}
{"ts":"2026-05-26T14:49:53.777123+00:00","pid":1375,"seq":3,"section":"META","attributes":{"event":"host_recording_started","inner":"Temporal\\Worker\\Transport\\RoadRunner","pid":1375,"transcript_path":"/Users/xepozz/IdeaProjects/temporalio/runtime/tests/transcripts/20260526-144953-4e13/worker__pid1375__1779806993594.log"}}
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{"ts":"2026-05-26T14:49:53.940391+00:00","pid":1377,"seq":3,"section":"META","attributes":{"event":"host_recording_started","inner":"Temporal\\Worker\\Transport\\RoadRunner","pid":1377,"transcript_path":"/Users/xepozz/IdeaProjects/temporalio/runtime/tests/transcripts/20260526-144953-4e13/worker__pid1377__1779806993859.log"}}
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{"ts":"2026-05-26T14:49:54.181085+00:00","pid":1345,"seq":2,"section":"TEST_START","attributes":{"class":"Temporal\\Tests\\Acceptance\\Extra\\Stability\\Destroyable\\DestroyableTest","method":"destroyOnFinish"}}
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{"ts":"2026-05-26T14:49:54.409913+00:00","pid":1377,"seq":7,"section":"META","attributes":{"event":"workflow_execute_start","workflow_type":"Extra_Stability_Destroyable","workflow_id":"d1b4cdcd-4c20-4788-a2e6-977f20da77a5","run_id":"019e64c3-7fd1-7cc9-8d11-a08fceedb5f8","is_replaying":false}}
{"ts":"2026-05-26T14:49:54.410236+00:00","pid":1377,"seq":8,"section":"META","attributes":{"event":"workflow_execute_completed","workflow_type":"Extra_Stability_Destroyable","workflow_id":"d1b4cdcd-4c20-4788-a2e6-977f20da77a5","run_id":"019e64c3-7fd1-7cc9-8d11-a08fceedb5f8","is_replaying":false}}
{"ts":"2026-05-26T14:49:54.416005+00:00","pid":1377,"seq":9,"section":"WIRE_OUTBOUND","attributes":{"inbound_batch_id":2,"outbound_seq":1,"bytes":3425},"payload":{"body":{"encoding":"temporal-frame","messages":[{"payloads":[null]},{"id":"9001","command":"Panic","options":[],"failure":{"message":"Division by zero","source":"PHP_SDK","stack_trace":"#0  [internal function]\n    Temporal\\Tests\\Acceptance\\Extra\\Stability\\Destroyable\\TestWorkflow->handle()\n#1  /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Declaration/Dispatcher/Dispatcher.php:93\n    ReflectionMethod->invokeArgs(Temporal\\Tests\\Acceptance\\Extra\\Stability\\Destroyable\\TestWorkflow,array(0))\n#2  /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Declaration/Dispatcher/Dispatcher.php:77\n    Temporal\\Internal\\Declaration\\Dispatcher\\Dispatcher::{closure:Temporal\\Internal\\Declaration\\Dispatcher\\Dispatcher::createExecutorFromMethod():91}(Temporal\\Tests\\Acceptance\\Extra\\Stability\\Destroyable\\TestWorkflow,array(0))\n#3  /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Declaration/Dispatcher/AutowiredPayloads.php:26\n    Temporal\\Internal\\Declaration\\Dispatcher\\Dispatcher->dispatch(Temporal\\Tests\\Acceptance\\Extra\\Stability\\Destroyable\\TestWorkflow,array(0))\n#4  /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Declaration/MethodHandler.php:35\n    Temporal\\Internal\\Declaration\\Dispatcher\\AutowiredPayloads->dispatch(Temporal\\Tests\\Acceptance\\Extra\\Stability\\Destroyable\\TestWorkflow,array(0))\n#5  /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Workflow/Process/DeferredGenerator.php:198\n    Temporal\\Internal\\Declaration\\MethodHandler->__invoke(Temporal\\DataConverter\\EncodedValues)\n#6  /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Workflow/Process/DeferredGenerator.php:151\n    Temporal\\Internal\\Workflow\\Process\\DeferredGenerator->start()\n#7  /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Workflow/Process/Scope.php:419\n    Temporal\\Internal\\Workflow\\Process\\DeferredGenerator->valid()\n#8  /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Events/EventEmitterTrait.php:44\n    Temporal\\Internal\\Workflow\\Process\\Scope->next()\n#9  /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/WorkerFactory.php:283\n    Temporal\\WorkerFactory->emit(\"tick\")\n#10 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/WorkerFactory.php:383\n    Temporal\\WorkerFactory->tick()\n#11 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/WorkerFactory.php:267\n    Temporal\\WorkerFactory->dispatch(\"\\n�\\u0007\\b\\u0001\\u0012\\rStartWorkflow\\u001a�\\u0006{\\\"info\\\":{\\\"WorkflowExecution...\",array(6))\n#12 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Interceptor/Pipeline.php:107\n    Temporal\\WorkerFactory->{closure:Temporal\\WorkerFactory::run():264}(Temporal\\WorkerFactory)\n#13 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Plugin/WorkerPluginTrait.php:43\n    Temporal\\Internal\\Interceptor\\Pipeline->__invoke(Temporal\\WorkerFactory)\n#14 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Interceptor/Pipeline.php:113\n    Temporal\\Plugin\\AbstractPlugin->run(Temporal\\WorkerFactory,Temporal\\Internal\\Interceptor\\Pipeline)\n#15 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/WorkerFactory.php:275\n    Temporal\\Internal\\Interceptor\\Pipeline->__invoke(Temporal\\WorkerFactory)\n#16 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/tests/Acceptance/worker.php:145\n    Temporal\\WorkerFactory->run(Temporal\\Tests\\Acceptance\\App\\Transport\\RecordingHost)","application_failure_info":{"type":"DivisionByZeroError"}},"payloads":[],"header":[]}]}}}
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{"ts":"2026-05-26T14:49:54.421264+00:00","pid":1377,"seq":11,"section":"WIRE_ERROR","attributes":{"class":"Error"},"payload":{"message":"Typed property Temporal\\Tests\\Acceptance\\Extra\\Stability\\Destroyable\\TestWorkflow::$logger must not be accessed before initialization","trace":"#0 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Declaration/Instance.php(50): Temporal\\Tests\\Acceptance\\Extra\\Stability\\Destroyable\\TestWorkflow->destroy()\n#1 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Workflow/WorkflowContext.php(717): Temporal\\Internal\\Declaration\\Instance->destroy()\n#2 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Workflow/Process/Scope.php(302): Temporal\\Internal\\Workflow\\WorkflowContext->destroy()\n#3 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Transport/Router/DestroyWorkflow.php(61): Temporal\\Internal\\Workflow\\Process\\Scope->destroy()\n#4 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Events/EventEmitterTrait.php(44): Temporal\\Internal\\Transport\\Router\\DestroyWorkflow->{closure:Temporal\\Internal\\Transport\\Router\\DestroyWorkflow::kill():60}()\n#5 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/WorkerFactory.php(284): Temporal\\WorkerFactory->emit('finally')\n#6 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/WorkerFactory.php(383): Temporal\\WorkerFactory->tick()\n#7 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/WorkerFactory.php(267): Temporal\\WorkerFactory->dispatch('\\n\\x94\\x01\\x08\\x02\\x12\\x0FDestroyW...', Array)\n#8 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Interceptor/Pipeline.php(107): Temporal\\WorkerFactory->{closure:Temporal\\WorkerFactory::run():264}(Object(Temporal\\WorkerFactory))\n#9 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Plugin/WorkerPluginTrait.php(43): Temporal\\Internal\\Interceptor\\Pipeline->__invoke(Object(Temporal\\WorkerFactory))\n#10 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Interceptor/Pipeline.php(113): Temporal\\Plugin\\AbstractPlugin->run(Object(Temporal\\WorkerFactory), Object(Temporal\\Internal\\Interceptor\\Pipeline))\n#11 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/WorkerFactory.php(275): Temporal\\Internal\\Interceptor\\Pipeline->__invoke(Object(Temporal\\WorkerFactory))\n#12 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/tests/Acceptance/worker.php(145): Temporal\\WorkerFactory->run(Object(Temporal\\Tests\\Acceptance\\App\\Transport\\RecordingHost))\n#13 {main}"}}
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{"ts":"2026-05-26T14:49:54.426772+00:00","pid":1377,"seq":17,"section":"WIRE_ERROR","attributes":{"class":"Error"},"payload":{"message":"Typed property Temporal\\Tests\\Acceptance\\Extra\\Stability\\Destroyable\\TestWorkflow::$logger must not be accessed before initialization","trace":"#0 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Declaration/Instance.php(50): Temporal\\Tests\\Acceptance\\Extra\\Stability\\Destroyable\\TestWorkflow->destroy()\n#1 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Workflow/WorkflowContext.php(717): Temporal\\Internal\\Declaration\\Instance->destroy()\n#2 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Workflow/Process/Scope.php(302): Temporal\\Internal\\Workflow\\WorkflowContext->destroy()\n#3 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Transport/Router/DestroyWorkflow.php(61): Temporal\\Internal\\Workflow\\Process\\Scope->destroy()\n#4 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Events/EventEmitterTrait.php(44): Temporal\\Internal\\Transport\\Router\\DestroyWorkflow->{closure:Temporal\\Internal\\Transport\\Router\\DestroyWorkflow::kill():60}()\n#5 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/WorkerFactory.php(284): Temporal\\WorkerFactory->emit('finally')\n#6 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/WorkerFactory.php(383): Temporal\\WorkerFactory->tick()\n#7 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/WorkerFactory.php(267): Temporal\\WorkerFactory->dispatch('\\n\\x94\\x01\\x08\\x04\\x12\\x0FDestroyW...', Array)\n#8 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Interceptor/Pipeline.php(107): Temporal\\WorkerFactory->{closure:Temporal\\WorkerFactory::run():264}(Object(Temporal\\WorkerFactory))\n#9 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Plugin/WorkerPluginTrait.php(43): Temporal\\Internal\\Interceptor\\Pipeline->__invoke(Object(Temporal\\WorkerFactory))\n#10 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/Internal/Interceptor/Pipeline.php(113): Temporal\\Plugin\\AbstractPlugin->run(Object(Temporal\\WorkerFactory), Object(Temporal\\Internal\\Interceptor\\Pipeline))\n#11 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/src/WorkerFactory.php(275): Temporal\\Internal\\Interceptor\\Pipeline->__invoke(Object(Temporal\\WorkerFactory))\n#12 /Users/xepozz/IdeaProjects/temporalio/sdk-php-transcript/tests/Acceptance/worker.php(145): Temporal\\WorkerFactory->run(Object(Temporal\\Tests\\Acceptance\\App\\Transport\\RecordingHost))\n#13 {main}"}}
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{"ts":"2026-05-26T14:49:59.002907+00:00","pid":1345,"seq":8,"section":"TEST_END","attributes":{"class":"Temporal\\Tests\\Acceptance\\Extra\\Stability\\Destroyable\\DestroyableTest","method":"destroyOnFinish","status":"failed","duration_ms":4822,"exception_class":"Temporal\\Exception\\Client\\TimeoutException"}}

This is the full history of sdk communications and actions which is very helpful when we find bugs or implement new features.

Why?

This PR allows to find details more precisely and faster compared to regular debugging.

Checklist

1. Closes

2. How was this tested:

3. Any docs updates needed?