The per_file_view_window_char_limit column is defined as INTEGER (32-bit)
in PostgreSQL. Without API-level validation, users could pass values
exceeding int32 max (2,147,483,647), causing database errors.
Changes:
- Added MAX_INT32, MAX_PER_FILE_VIEW_WINDOW_CHAR_LIMIT, and
MAX_FILES_OPEN_LIMIT constants
- Added field validators to CreateAgent and UpdateAgent schemas to
enforce these limits
Fixes#8936🤖 Generated with [Letta Code](https://letta.com)
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The sync_provider_models_async function was only checking for existing
models by (handle, organization_id, model_type) before creating, but
the database has a second unique constraint on (name, provider_id,
model_type). This caused UniqueConstraintViolationError when a model
with the same name/provider already existed under a different handle.
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Cloud SQL's connection pooler can return connections with stale
session settings from previous clients. If any client (Datadog,
monitoring tools, manual psql) sets statement_timeout, that setting
persists on the pooled connection.
This explicitly sets statement_timeout=0 via asyncpg's server_settings
on every connection, ensuring consistent behavior regardless of
connection pool state.
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* feat: add metadata-only provider trace storage option
Add support for writing provider traces to a lightweight metadata-only
table (~1.5GB) instead of the full table (~725GB) since request/response
JSON is now stored in GCS.
- Add `LETTA_TELEMETRY_PROVIDER_TRACE_PG_METADATA_ONLY` setting
- Create `provider_trace_metadata` table via alembic migration
- Conditionally write to new table when flag is enabled
- Include backfill script for migrating existing data
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* chore: regenerate API spec and SDK
* fix: use composite PK (created_at, id) for provider_trace_metadata
Aligns with GCS partitioning structure (raw/date=YYYY-MM-DD/{id}.json.gz)
and enables efficient date-range queries via the B-tree index.
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* ammendments
* fix: add bulk data copy to migration
Copy existing provider_traces metadata in-migration instead of separate
backfill script. Creates indexes after bulk insert for better performance.
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* fix: remove data copy from migration, create empty table only
Old data stays in provider_traces, new writes go to provider_trace_metadata
when flag is enabled. Full traces are in GCS anyway.
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* fix: address PR comments
- Remove GCS mention from ProviderTraceMetadata docstring
- Move metadata object creation outside session context
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* fix: reads always use full provider_traces table
The metadata_only flag should only control writes. Reads always go to
the full table to avoid returning ProviderTraceMetadata where
ProviderTrace is expected.
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* feat: enable metadata-only provider trace writes in prod
Add LETTA_TELEMETRY_PROVIDER_TRACE_PG_METADATA_ONLY=true to all
Helm values (memgpt-server and lettuce-py, prod and dev).
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---------
Co-authored-by: Letta <noreply@letta.com>
* fix: non-streaming conversation messages endpoint
**Problems:**
1. `AssertionError: run_id is required when enforce_run_id_set is True`
- Non-streaming path didn't create a run before calling `step()`
2. `ResponseValidationError: Unable to extract tag using discriminator 'message_type'`
- `response_model=LettaStreamingResponse` but non-streaming returns `LettaResponse`
**Fixes:**
1. Add run creation before calling `step()` (mirrors agents endpoint)
2. Set run_id in Redis for cancellation support
3. Pass `run_id` to `step()`
4. Change `response_model` from `LettaStreamingResponse` to `LettaResponse`
(streaming returns `StreamingResponse` which bypasses response_model validation)
**Test:**
Added `test_conversation_non_streaming_raw_http` to verify the fix.
👾 Generated with [Letta Code](https://letta.com)
Co-Authored-By: Letta <noreply@letta.com>
* api sync
---------
Co-authored-by: Letta <noreply@letta.com>
**Problem:**
When a user sends a message with an image URL that times out or fails to
fetch, the server returns a 500 Internal Server Error with a generic message.
This is confusing because the user doesn't know what went wrong.
**Root Cause:**
`LettaImageFetchError` was not registered in the exception handlers, so it
bubbled up as an unhandled exception.
**Fix:**
Register `LettaImageFetchError` with the 400 Bad Request handler. Now users
get a clear error message like:
```
Failed to fetch image from https://...: Timeout after 2 attempts
```
This tells users exactly what went wrong so they can retry with a different
image or verify the URL is accessible.
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**Error:**
```
TypeError: LettaAgentV2.__init__() got an unexpected keyword argument 'conversation_id'
```
**Trace:** https://letta.grafana.net/goto/afbk4da3fuxhcf?orgId=stacks-1189126
**Problem:**
The `POST /v1/conversations/{conversation_id}/compact` endpoint was failing
because `LettaAgentV3` inherits from `LettaAgentV2` without overriding
`__init__`, so passing `conversation_id` to the constructor failed.
**Fix:**
1. Add `__init__` to `LettaAgentV3` that accepts optional `conversation_id`
2. Remove redundant `conversation_id` param from `_checkpoint_messages` -
use `self.conversation_id` consistently instead
3. Clean up internal callers that were passing `conversation_id=self.conversation_id`
Backward compatible - existing code creating `LettaAgentV3(agent_state, actor)`
still works since `conversation_id` defaults to `None`.
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* feat: add ID format validation to batch request schema
Add ID format validation to LettaBatchRequest using existing validator
types from letta.validators.
Changes:
- LettaBatchRequest.agent_id: str → AgentId
This ensures malformed agent IDs in batch requests are rejected with 422
validation errors instead of causing 500 database errors.
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* chore: regenerate API spec and SDK
---------
Co-authored-by: Letta <noreply@letta.com>
* feat: add ID format validation to identity schemas
Add ID format validation to IdentityCreate, IdentityUpsert, and IdentityUpdate
schemas using existing validator types from letta.validators.
Changes:
- agent_ids: Optional[List[str]] → Optional[List[AgentId]]
- block_ids: Optional[List[str]] → Optional[List[BlockId]]
This ensures malformed IDs are rejected with 422 validation errors instead
of causing 500 database errors.
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* chore: regenerate API spec and SDK
---------
Co-authored-by: Letta <noreply@letta.com>
* feat: add ID format validation to group schemas
Add ID format validation to GroupCreate, GroupUpdate, and manager config
schemas using existing validator types from letta.validators.
Changes:
- GroupCreate/GroupUpdate: agent_ids → List[AgentId], shared_block_ids → List[BlockId]
- SupervisorManager, DynamicManager, SleeptimeManager, VoiceSleeptimeManager:
manager_agent_id → AgentId
- Update variants: manager_agent_id → Optional[AgentId]
This ensures malformed IDs are rejected with 422 validation errors instead
of causing 500 database errors.
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* chore: regenerate API spec and SDK
---------
Co-authored-by: Letta <noreply@letta.com>
Check if a block with the same label already exists before attaching
to sleeptime agents. This prevents UniqueConstraintViolationError on
the (agent_id, block_label) constraint when the same block is attached
multiple times due to race conditions.
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**Problem:**
When retrying an approval response, the idempotency check only looked at
the last message. If the approved tool triggered server-side tool calls
(e.g., `memory`), those tool returns would be the last message, causing
the idempotency check to fail with:
"Cannot process approval response: No tool call is currently awaiting approval."
**Root Cause:**
The check at line 249 only validated `current_in_context_messages[-1]`,
but server-side tool calls can add additional tool return messages after
the original approved tool's return.
**Fix:**
Search the last 10 messages (instead of just the last one) for a tool
return matching the approval's tool_call_ids. This handles the case where
server-side tool calls happen after the approved tool executes, while
keeping the search bounded and efficient.
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The cursor-based pagination was not accounting for sort order. When using
descending order (the default), "after cursor X" should return items with
id < X (items that come after X in the descending result set), but the code
was using id > X which caused infinite loops in clients iterating through pages.
This fix adjusts the cursor comparison based on the sort order:
- ascending: after=id > X, before=id < X
- descending: after=id < X, before=id > X
Note: Other pagination methods (list_agent_sources_async, list_agent_tools_async,
list_agent_groups_async) may have the same issue and should be audited.
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* fix: remove deprecation from agent passages endpoints
The client.agent.passages endpoints (list, create, search, delete) were
incorrectly marked as deprecated. This would break significant amounts
of user code and negatively impact developer experience.
Fixes#9116
Co-authored-by: Ari Webb <AriWebb@users.noreply.github.com>
* stage publish api
---------
Co-authored-by: letta-code <248085862+letta-code@users.noreply.github.com>
Co-authored-by: Ari Webb <AriWebb@users.noreply.github.com>
Co-authored-by: Ari Webb <ari@letta.com>
The MiniMaxProvider class was missing a check_api_key() implementation,
causing /v1/providers/check to return a 500 error when validating
MiniMax API keys. The base Provider class raises NotImplementedError.
This adds check_api_key() using the Anthropic client (since MiniMax uses
an Anthropic-compatible API), following the same pattern as AnthropicProvider.
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Revert "fix: ensure stop_reason is always set and reduce noisy logs (#9046)"
This reverts commit 4241a360579440d2697124ba69061d0e46ecc5e9.
**Problem:**
After the original change, caren-code-agent reported streams hanging
indefinitely. The trace shows ttft (time to first token) succeeds, but
the stream never closes.
**Root Cause (suspected):**
The change modified `is_complete=is_done` to `is_complete=saw_done`,
meaning error events no longer mark the stream as complete immediately.
This may cause timing issues where clients wait for more data before
the finalizer runs.
**Fix:**
Revert to the defensive "belt-and-suspenders" approach that always
appends [DONE]. The noisy logs are preferable to hanging streams.
The original comment noted: "Even if a previous chunk set `complete`,
an extra [DONE] is harmless and ensures SDKs that rely on explicit
[DONE] will exit."
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**Problem:**
Runs failed with error:
```
Argument step_id does not match type <class 'str'>; is None of type <class 'NoneType'>
```
This happened when processing approval responses where the original
approval request message had `step_id=None`.
**Root Cause:**
Line 672 in `_step()` directly used `approval_request.step_id`:
```python
step_id = approval_request.step_id # Can be None!
step_metrics = await self.step_manager.get_step_metrics_async(step_id=step_id, ...)
```
`Message.step_id` is `Optional[str]` (default None), but `get_step_metrics_async`
has `step_id: str` with `@enforce_types` validation.
Old approval messages or edge cases could have `step_id=None`, causing
the enforce_types decorator to reject the call.
**Fix:**
Check if `step_id is None` and generate a new step_id + initialize step
checkpoint if needed, instead of assuming step_id always exists.
**Note:**
Similar issue exists in letta_agent_v2.py and temporal agents, but v2
is deprecated.
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fix: load default provider config when summarizer uses different provider
**Problem:**
Summarization failed when agent used one provider (e.g., Google AI) but
summarizer config specified a different provider (e.g., Anthropic):
```python
# Agent LLM config
model_endpoint_type='google_ai', handle='gemini-something/gemini-2.5-pro',
context_window=100000
# Summarizer config
model='anthropic/claude-haiku-4-5-20251001'
# Bug: Resulting summarizer_llm_config mixed Google + Anthropic settings
model='claude-haiku-4-5-20251001', model_endpoint_type='google_ai', # ❌ Wrong endpoint!
context_window=100000 # ❌ Google's context window, not Anthropic's default!
```
This sent Claude requests to Google AI endpoints with incorrect parameters.
**Root Cause:**
`_build_summarizer_llm_config()` always copied the agent's LLM config as base,
then patched model/provider fields. But this kept all provider-specific settings
(endpoint, context_window, etc.) from the wrong provider.
**Fix:**
1. Parse provider_name from summarizer handle
2. Check if it matches agent's model_endpoint_type (or provider_name for custom)
3. **If YES** → Use agent config as base, override model/handle (same provider)
4. **If NO** → Load default config via `provider_manager.get_llm_config_from_handle()` (new provider)
**Example Flow:**
```python
# Agent: google_ai/gemini-2.5-pro
# Summarizer: anthropic/claude-haiku
provider_name = "anthropic" # Parsed from handle
provider_matches = ("anthropic" == "google_ai") # False ❌
# Different provider → load default Anthropic config
base = await provider_manager.get_llm_config_from_handle(
handle="anthropic/claude-haiku",
actor=self.actor
)
# Returns: model_endpoint_type='anthropic', endpoint='https://api.anthropic.com', etc. ✅
```
**Result:**
- Summarizer with different provider gets correct default config
- No more mixing Google endpoints with Anthropic models
- Same-provider summarizers still inherit agent settings efficiently
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* feat: add conversation_id to message search results
Add conversation_id field to all *MessageListResult classes
(SystemMessageListResult, UserMessageListResult, ReasoningMessageListResult,
AssistantMessageListResult) so that conversation IDs are returned from
the /messages/search endpoint alongside agent IDs.
Fixes#9055
Co-authored-by: Charles Packer <cpacker@users.noreply.github.com>
* chore: regenerate SDK and OpenAPI spec
Regenerate autogenerated files after adding conversation_id to
message search result schemas.
Co-authored-by: Sarah Wooders <sarahwooders@users.noreply.github.com>
---------
Co-authored-by: letta-code <248085862+letta-code@users.noreply.github.com>
Co-authored-by: Charles Packer <cpacker@users.noreply.github.com>
Co-authored-by: Sarah Wooders <sarahwooders@users.noreply.github.com>
fix: gracefully skip assistant messages with empty content in LLM format conversion
**Problem:**
Context window calculation crashed with AssertionError when converting messages
to Google/Anthropic/OpenAI format:
```
AssertionError at line 2047: assert self.tool_calls is not None or
text_content is not None or len(self.content) > 1
```
This happened when loading agents with old/malformed messages that had
`content=None` or `content=[]` in the database.
**Root Cause:**
The Message ORM model allows `content: Optional[List[...]] = None` (line 252),
but format conversion methods assumed content would always have extractable text
or tool calls.
Scenarios that triggered crashes:
1. Assistant message with `content=None` (old migrations/edge cases)
2. Assistant message with `content=[]` (message creation bugs)
3. Assistant message with single non-text content that doesn't match extraction logic
**Fix:**
Replaced assertions with defensive checks in 3 conversion methods:
1. `to_google_dict()` (line 2054) - Return None to skip unconvertible messages
2. `to_openai_responses_api_dicts()` (line 1476) - Return early to skip
3. `to_anthropic_dict()` (line 1794) - Return None to skip
Pattern: Check for empty content, return None/early to skip gracefully.
**Result:**
- Context window calculation no longer crashes on malformed/old messages
- Messages with no convertible content are silently skipped
- Consistent with existing Anthropic reasoning-only message handling (line 1308)
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**Problem:**
Error logs showed empty detail fields when exceptions had no message:
```
Error during step processing:
Run run-xxx stopped with unknown error: , error_data: {...'detail': ''}
```
This made debugging production issues difficult as the actual error type
was hidden.
**Root Cause:**
Python exceptions created with no arguments (e.g., `Exception()` or caught
and re-raised in certain ways) have `str(e) == ""`:
```python
e = Exception()
str(e) # Returns ""
repr(e) # Returns "Exception()"
```
When exceptions with empty string representations were caught, all logging
and error messages showed blank details.
**Fix:**
Use `str(e) or repr(e)` fallback pattern in 3 places:
1. `letta_agent_v3.py` stream() exception handler (line 406)
2. `letta_agent_v3.py` step() exception handler (line 928)
3. `streaming_service.py` generic exception handler (line 469)
**Result:**
- Error logs now show `Exception()` or similar instead of empty string
- Helps identify exception types even when message is missing
- Better production debugging without changing exception handling logic
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Co-authored-by: Letta <noreply@letta.com>
