Bug: update_memory_strategies fails when modifying certain strategy types

[jariy17]

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Bug: update_memory_strategies fails when modifying certain strategy types

Summary

The update_memory_strategies method (and modify_strategy) fail when attempting to modify configurations for:

1. CUSTOM strategies with SELF_MANAGED type - crashes with ValueError
2. Built-in strategies (SEMANTIC, USER_PREFERENCE) - API rejects the request

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Bug #1: Cannot modify CUSTOM strategies with SELF_MANAGED type

Problem: Calling update_memory_strategies or modify_strategy on a SELF_MANAGED strategy with configuration crashes with ValueError: 'SELF_MANAGED' is not a valid OverrideType

Reproduce:
from bedrock_agentcore.memory import MemoryClient

client = MemoryClient(region_name='us-west-2')

Assume you have a CUSTOM strategy with SELF_MANAGED configuration

client.modify_strategy(
memory_id='BasicTestMemory2-q8ughRAgdr',
strategy_id='self_managed_v4ze2-G2RJC0H1bA',
configuration={
'extraction': {
'historicalContextWindowSize': 10,
'triggerEveryNMessages': 5
}
}
)

Error:
ValueError: 'SELF_MANAGED' is not a valid OverrideType
File "bedrock_agentcore/memory/client.py", line 1945, in _wrap_configuration
override_enum = OverrideType(override_type)

Expected: Should successfully modify the SELF_MANAGED strategy configuration

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Bug #2: Cannot modify extraction configs on built-in strategies

Problem: Calling update_memory_strategies or modify_strategy to update extraction configuration on built-in strategies (SEMANTIC, USER_PREFERENCE, SUMMARIZATION, EPISODIC) fails with API validation error

Reproduce:
from bedrock_agentcore.memory import MemoryClient

client = MemoryClient(region_name='us-west-2')

Try to modify extraction config on USER_PREFERENCE strategy

client.modify_strategy(
memory_id='BasicTestMemory2-q8ughRAgdr',
strategy_id='PreferenceLearner-ZBpZgK98UJ',
configuration={
'extraction': {
'historicalContextWindowSize': 15
}
}
)

Error:
botocore.exceptions.ParamValidationError: Parameter validation failed:
Unknown parameter in memoryStrategies.modifyMemoryStrategies[0].configuration.extraction:
"userPreferenceExtractionConfiguration", must be one of: customExtractionConfiguration

What works vs what doesn't (verified by testing):

• ✅ Modifying description and namespaces on built-in strategies works
• ❌ Modifying extraction or consolidation on built-in strategies fails
• ✅ Modifying extraction or consolidation on CUSTOM strategies with override types works

Expected: Either should work, or should fail with a clear error message before calling the API

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Impact

• Bug migrate from staging #1: Users cannot modify ANY CUSTOM strategy that has a SELF_MANAGED configuration
• Bug ci(deps): bump trufflesecurity/trufflehog from 3.63.1 to 3.90.0 #2: Users get confusing API errors when trying to modify extraction/consolidation on built-in strategies