* feat: add billing context to LLM telemetry traces
Add billing metadata (plan type, cost source, customer ID) to LLM traces in ClickHouse for cost analytics and attribution.
**Data Flow:**
- Cloud-API: Extract billing info from subscription in rate limiting, set x-billing-* headers
- Core: Parse headers into BillingContext object via dependencies
- Adapters: Flow billing_context through all LLM adapters (blocking & streaming)
- Agent: Pass billing_context to step() and stream() methods
- ClickHouse: Store in billing_plan_type, billing_cost_source, billing_customer_id columns
**Changes:**
- Add BillingContext schema to provider_trace.py
- Add billing columns to llm_traces ClickHouse table DDL
- Update getCustomerSubscription to fetch stripeCustomerId from organization_billing_details
- Propagate billing_context through agent step flow, adapters, and streaming service
- Update ProviderTrace and LLMTrace to include billing metadata
- Regenerate SDK with autogen
**Production Deployment:**
Requires env vars: LETTA_PROVIDER_TRACE_BACKEND=clickhouse, LETTA_STORE_LLM_TRACES=true, CLICKHOUSE_*
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* fix: add billing_context parameter to agent step methods
- Add billing_context to BaseAgent and BaseAgentV2 abstract methods
- Update LettaAgent, LettaAgentV2, LettaAgentV3 step methods
- Update multi-agent groups: SleeptimeMultiAgentV2, V3, V4
- Fix test_utils.py to include billing header parameters
- Import BillingContext in all affected files
* fix: add billing_context to stream methods
- Add billing_context parameter to BaseAgentV2.stream()
- Add billing_context parameter to LettaAgentV2.stream()
- LettaAgentV3.stream() already has it from previous commit
* fix: exclude billing headers from OpenAPI spec
Mark billing headers as internal (include_in_schema=False) so they don't appear in the public API.
These are internal headers between cloud-api and core, not part of the public SDK.
Regenerated SDK with stage-api - removes 10,650 lines of bloat that was causing OOM during Next.js build.
* refactor: return billing context from handleUnifiedRateLimiting instead of mutating req
Instead of passing req into handleUnifiedRateLimiting and mutating headers inside it:
- Return billing context fields (billingPlanType, billingCostSource, billingCustomerId) from handleUnifiedRateLimiting
- Set headers in handleMessageRateLimiting (middleware layer) after getting the result
- This fixes step-orchestrator compatibility since it doesn't have a real Express req object
* chore: remove extra gencode
* p
---------
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* auto fixes
* auto fix pt2 and transitive deps and undefined var checking locals()
* manual fixes (ignored or letta-code fixed)
* fix circular import
* remove all ignores, add FastAPI rules and Ruff rules
* add ty and precommit
* ruff stuff
* ty check fixes
* ty check fixes pt 2
* error on invalid
* catch contextwindowexceeded error
* fix(core): detect Google token limit errors as ContextWindowExceededError
Google's error message says "input token count exceeds the maximum
number of tokens allowed" which doesn't contain the word "context",
so it was falling through to generic LLMBadRequestError instead of
ContextWindowExceededError. This means compaction won't auto-trigger.
Expands the detection to also match "token count" and "tokens allowed"
in addition to the existing "context" keyword.
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* fix(core): add missing message arg to LLMBadRequestError in OpenAI client
The generic 400 path in handle_llm_error was constructing
LLMBadRequestError without the required message positional arg,
causing TypeError in prod during summarization.
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* ci: add adapters/ test suite to core unit test matrix
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* fix(tests): update adapter error handling test expectations to match actual behavior
The streaming adapter's error handling double-wraps errors: the
AnthropicStreamingInterface calls handle_llm_error first, then the
adapter catches the result and calls handle_llm_error again, which
falls through to the base class LLMError. Updated test expectations
to match this behavior.
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* fix(core): prevent double-wrapping of LLMError in stream adapter
The AnthropicStreamingInterface.process() already transforms raw
provider errors into LLMError subtypes via handle_llm_error. The
adapter was catching the result and calling handle_llm_error again,
which didn't recognize the already-transformed LLMError and wrapped
it in a generic LLMError("Unhandled LLM error"). This downgraded
specific error types (LLMConnectionError, LLMServerError, etc.)
and broke retry logic that matches on specific subtypes.
Now the adapter checks if the error is already an LLMError and
re-raises it as-is. Tests restored to original correct expectations.
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---------
Co-authored-by: Letta <noreply@letta.com>
* fix: handle Anthropic overloaded_error in streaming interfaces
* fix: handle Unicode surrogates in OpenAI requests
Sanitize Unicode surrogate pairs before sending requests to OpenAI API.
Surrogate pairs (U+D800-U+DFFF) are UTF-16 encoding artifacts that cause
UnicodeEncodeError when encoding to UTF-8.
Fixes Datadog error: 'utf-8' codec can't encode character '\ud83c' in
position 326605: surrogates not allowed
* fix: handle UnicodeEncodeError from lone Unicode surrogates in OpenAI requests
Improved sanitize_unicode_surrogates() to explicitly filter out lone
surrogate characters (U+D800 to U+DFFF) which are invalid in UTF-8.
Previous implementation used errors='ignore' which could still fail in
edge cases. New approach directly checks Unicode code points and removes
any surrogates before data reaches httpx encoding.
Also added sanitization to stream_async_responses() method which was
missing it.
Fixes: 'utf-8' codec can't encode character '\ud83c' in position X:
surrogates not allowed
Both letta_llm_stream_adapter and simple_llm_stream_adapter were
creating ProviderTrace without call_type, causing "unknown" in
ClickHouse analytics.
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* feat: add non-streaming option for conversation messages
- Add ConversationMessageRequest with stream=True default (backwards compatible)
- stream=true (default): SSE streaming via StreamingService
- stream=false: JSON response via AgentLoop.load().step()
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* chore: regenerate API schema for ConversationMessageRequest
* feat: add direct ClickHouse storage for raw LLM traces
Adds ability to store raw LLM request/response payloads directly in ClickHouse,
bypassing OTEL span attribute size limits. This enables debugging and analytics
on large LLM payloads (>10MB system prompts, large tool schemas, etc.).
New files:
- letta/schemas/llm_raw_trace.py: Pydantic schema with ClickHouse row helper
- letta/services/llm_raw_trace_writer.py: Async batching writer (fire-and-forget)
- letta/services/llm_raw_trace_reader.py: Reader with query methods
- scripts/sql/clickhouse/llm_raw_traces.ddl: Production table DDL
- scripts/sql/clickhouse/llm_raw_traces_local.ddl: Local dev DDL
- apps/core/clickhouse-init.sql: Local dev initialization
Modified:
- letta/settings.py: Added 4 settings (store_llm_raw_traces, ttl, batch_size, flush_interval)
- letta/llm_api/llm_client_base.py: Integration into request_async_with_telemetry
- compose.yaml: Added ClickHouse service for local dev
- justfile: Added clickhouse, clickhouse-cli, clickhouse-traces commands
Feature disabled by default (LETTA_STORE_LLM_RAW_TRACES=false).
Uses ZSTD(3) compression for 10-30x reduction on JSON payloads.
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* fix: address code review feedback for LLM raw traces
Fixes based on code review feedback:
1. Fix ClickHouse endpoint parsing - default to secure=False for raw host:port
inputs (was defaulting to HTTPS which breaks local dev)
2. Make raw trace writes truly fire-and-forget - use asyncio.create_task()
instead of awaiting, so JSON serialization doesn't block request path
3. Add bounded queue (maxsize=10000) - prevents unbounded memory growth
under load. Drops traces with warning if queue is full.
4. Fix deprecated asyncio usage - get_running_loop() instead of get_event_loop()
5. Add org_id fallback - use _telemetry_org_id if actor doesn't have it
6. Remove unused imports - json import in reader
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* fix: add missing asyncio import and simplify JSON serialization
- Add missing 'import asyncio' that was causing 'name asyncio is not defined' error
- Remove unnecessary clean_double_escapes() function - the JSON is stored correctly,
the clickhouse-client CLI was just adding extra escaping when displaying
- Update just clickhouse-trace to use Python client for correct JSON output
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* test: add clickhouse raw trace integration test
* test: simplify clickhouse trace assertions
* refactor: centralize usage parsing and stream error traces
Use per-client usage helpers for raw trace extraction and ensure streaming errors log requests with error metadata.
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* test: exercise provider usage parsing live
Make live OpenAI/Anthropic/Gemini requests with credential gating and validate Anthropic cache usage mapping when present.
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* test: fix usage parsing tests to pass
- Use GoogleAIClient with GEMINI_API_KEY instead of GoogleVertexClient
- Update model to gemini-2.0-flash (1.5-flash deprecated in v1beta)
- Add tools=[] for Gemini/Anthropic build_request_data
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* refactor: extract_usage_statistics returns LettaUsageStatistics
Standardize on LettaUsageStatistics as the canonical usage format returned by client helpers. Inline UsageStatistics construction for ChatCompletionResponse where needed.
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* feat: add is_byok and llm_config_json columns to ClickHouse traces
Extend llm_raw_traces table with:
- is_byok (UInt8): Track BYOK vs base provider usage for billing analytics
- llm_config_json (String, ZSTD): Store full LLM config for debugging and analysis
This enables queries like:
- BYOK usage breakdown by provider/model
- Config parameter analysis (temperature, max_tokens, etc.)
- Debugging specific request configurations
* feat: add tests for error traces, llm_config_json, and cache tokens
- Update llm_raw_trace_reader.py to query new columns (is_byok,
cached_input_tokens, cache_write_tokens, reasoning_tokens, llm_config_json)
- Add test_error_trace_stored_in_clickhouse to verify error fields
- Add test_cache_tokens_stored_for_anthropic to verify cache token storage
- Update existing tests to verify llm_config_json is stored correctly
- Make llm_config required in log_provider_trace_async()
- Simplify provider extraction to use provider_name directly
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* ci: add ClickHouse integration tests to CI pipeline
- Add use-clickhouse option to reusable-test-workflow.yml
- Add ClickHouse service container with otel database
- Add schema initialization step using clickhouse-init.sql
- Add ClickHouse env vars (CLICKHOUSE_ENDPOINT, etc.)
- Add separate clickhouse-integration-tests job running
integration_test_clickhouse_llm_raw_traces.py
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* refactor: simplify provider and org_id extraction in raw trace writer
- Use model_endpoint_type.value for provider (not provider_name)
- Simplify org_id to just self.actor.organization_id (actor is always pydantic)
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* refactor: simplify LLMRawTraceWriter with _enabled flag
- Check ClickHouse env vars once at init, set _enabled flag
- Early return in write_async/flush_async if not enabled
- Remove ValueError raises (never used)
- Simplify _get_client (no validation needed since already checked)
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* fix: add LLMRawTraceWriter shutdown to FastAPI lifespan
Properly flush pending traces on graceful shutdown via lifespan
instead of relying only on atexit handler.
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* feat: add agent_tags column to ClickHouse traces
Store agent tags as Array(String) for filtering/analytics by tag.
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* cleanup
* fix(ci): fix ClickHouse schema initialization in CI
- Create database separately before loading SQL file
- Remove CREATE DATABASE from SQL file (handled in CI step)
- Add verification step to confirm table was created
- Use -sf flag for curl to fail on HTTP errors
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* refactor: simplify LLM trace writer with ClickHouse async_insert
- Use ClickHouse async_insert for server-side batching instead of manual queue/flush loop
- Sync cloud DDL schema with clickhouse-init.sql (add missing columns)
- Remove redundant llm_raw_traces_local.ddl
- Remove unused batch_size/flush_interval settings
- Update tests for simplified writer
Key changes:
- async_insert=1, wait_for_async_insert=1 for reliable server-side batching
- Simple per-trace retry with exponential backoff (max 3 retries)
- ~150 lines removed from writer
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* refactor: consolidate ClickHouse direct writes into TelemetryManager backend
- Add clickhouse_direct backend to provider_trace_backends
- Remove duplicate ClickHouse write logic from llm_client_base.py
- Configure via LETTA_TELEMETRY_PROVIDER_TRACE_BACKEND=postgres,clickhouse_direct
The clickhouse_direct backend:
- Converts ProviderTrace to LLMRawTrace
- Extracts usage stats from response JSON
- Writes via LLMRawTraceWriter with async_insert
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* refactor: address PR review comments and fix llm_config bug
Review comment fixes:
- Rename clickhouse_direct -> clickhouse_analytics (clearer purpose)
- Remove ClickHouse from OSS compose.yaml, create separate compose.clickhouse.yaml
- Delete redundant scripts/test_llm_raw_traces.py (use pytest tests)
- Remove unused llm_raw_traces_ttl_days setting (TTL handled in DDL)
- Fix socket description leak in telemetry_manager docstring
- Add cloud-only comment to clickhouse-init.sql
- Update justfile to use separate compose file
Bug fix:
- Fix llm_config not being passed to ProviderTrace in telemetry
- Now correctly populates provider, model, is_byok for all LLM calls
- Affects both request_async_with_telemetry and log_provider_trace_async
DDL optimizations:
- Add secondary indexes (bloom_filter for agent_id, model, step_id)
- Add minmax indexes for is_byok, is_error
- Change model and error_type to LowCardinality for faster GROUP BY
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* refactor: rename llm_raw_traces -> llm_traces
Address review feedback that "raw" is misleading since we denormalize fields.
Renames:
- Table: llm_raw_traces -> llm_traces
- Schema: LLMRawTrace -> LLMTrace
- Files: llm_raw_trace_{reader,writer}.py -> llm_trace_{reader,writer}.py
- Setting: store_llm_raw_traces -> store_llm_traces
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* fix: update workflow references to llm_traces
Missed renaming table name in CI workflow files.
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* fix: update clickhouse_direct -> clickhouse_analytics in docstring
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* chore: remove inaccurate OTEL size limit comments
The 4MB limit is our own truncation logic, not an OTEL protocol limit.
The real benefit is denormalized columns for analytics queries.
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* chore: remove local ClickHouse dev setup (cloud-only feature)
- Delete clickhouse-init.sql and compose.clickhouse.yaml
- Remove local clickhouse just commands
- Update CI to use cloud DDL with MergeTree for testing
clickhouse_analytics is a cloud-only feature. For local dev, use postgres backend.
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* fix: restore compose.yaml to match main
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* refactor: merge clickhouse_analytics into clickhouse backend
Per review feedback - having two separate backends was confusing.
Now the clickhouse backend:
- Writes to llm_traces table (denormalized for cost analytics)
- Reads from OTEL traces table (will cut over to llm_traces later)
Config: LETTA_TELEMETRY_PROVIDER_TRACE_BACKEND=postgres,clickhouse
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* fix: correct path to DDL file in CI workflow
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* chore: add provider index to DDL for faster filtering
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* fix: configure telemetry backend in clickhouse tests
Tests need to set telemetry_settings.provider_trace_backends to include
'clickhouse', otherwise traces are routed to default postgres backend.
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* fix: set provider_trace_backend field, not property
provider_trace_backends is a computed property, need to set the
underlying provider_trace_backend string field instead.
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* fix: error trace test and error_type extraction
- Add TelemetryManager to error trace test so traces get written
- Fix error_type extraction to check top-level before nested error dict
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* fix: use provider_trace.id for trace correlation across backends
- Pass provider_trace.id to LLMTrace instead of auto-generating
- Log warning if ID is missing (shouldn't happen, helps debug)
- Fallback to new UUID only if not set
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* fix: trace ID correlation and concurrency issues
- Strip "provider_trace-" prefix from ID for UUID storage in ClickHouse
- Add asyncio.Lock to serialize writes (clickhouse_connect not thread-safe)
- Fix Anthropic prompt_tokens to include cached tokens for cost analytics
- Log warning if provider_trace.id is missing
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---------
Co-authored-by: Letta <noreply@letta.com>
Co-authored-by: Caren Thomas <carenthomas@gmail.com>
* feat: centralize telemetry logging at LLM client level
Moves telemetry logging from individual adapters to LLMClientBase:
- Add TelemetryStreamWrapper for streaming telemetry on stream close
- Add request_async_with_telemetry() for non-streaming requests
- Add stream_async_with_telemetry() for streaming requests
- Add set_telemetry_context() to configure agent_id, run_id, step_id
Updates adapters and agents to use new pattern:
- LettaLLMAdapter now accepts agent_id/run_id in constructor
- Adapters call set_telemetry_context() before LLM requests
- Removes duplicate telemetry logging from adapters
- Enriches traces with agent_id, run_id, call_type metadata
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* fix: accumulate streaming response content for telemetry
TelemetryStreamWrapper now extracts actual response data from chunks:
- Content text (concatenated from deltas)
- Tool calls (id, name, arguments)
- Model name, finish reason, usage stats
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* refactor: move streaming telemetry to caller (option 3)
- Remove TelemetryStreamWrapper class
- Add log_provider_trace_async() helper to LLMClientBase
- stream_async_with_telemetry() now just returns raw stream
- Callers log telemetry after processing with rich interface data
Updated callers:
- summarizer.py: logs content + usage after stream processing
- letta_agent.py: logs tool_call, reasoning, model, usage
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* fix: pass agent_id and run_id to parent adapter class
LettaLLMStreamAdapter was not passing agent_id/run_id to parent,
causing "unexpected keyword argument" errors.
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---------
Co-authored-by: Letta <noreply@letta.com>
* feat: add provider trace backend abstraction for multi-backend telemetry
Introduces a pluggable backend system for provider traces:
- Base class with async/sync create and read interfaces
- PostgreSQL backend (existing behavior)
- ClickHouse backend (via OTEL instrumentation)
- Socket backend (writes to Unix socket for crouton sidecar)
- Factory for instantiating backends from config
Refactors TelemetryManager to use backends with support for:
- Multi-backend writes (concurrent via asyncio.gather)
- Primary backend for reads (first in config list)
- Graceful error handling per backend
Config: LETTA_TELEMETRY_PROVIDER_TRACE_BACKEND (comma-separated)
Example: "postgres,socket" for dual-write to Postgres and crouton
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* feat: add protocol version to socket backend records
Adds PROTOCOL_VERSION constant to socket backend:
- Included in every telemetry record sent to crouton
- Must match ProtocolVersion in apps/crouton/main.go
- Enables crouton to detect and reject incompatible messages
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* fix: remove organization_id from ProviderTraceCreate calls
The organization_id is now handled via the actor parameter in the
telemetry manager, not through ProviderTraceCreate schema. This fixes
validation errors after changing ProviderTraceCreate to inherit from
BaseProviderTrace which forbids extra fields.
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* consolidate provider trace
* add clickhouse-connect to fix bug on main lmao
* auto generated sdk changes, and deployment details, and clikchouse prefix bug and added fields to runs trace return api
* auto generated sdk changes, and deployment details, and clikchouse prefix bug and added fields to runs trace return api
* consolidate provider trace
* consolidate provider trace bug fix
---------
Co-authored-by: Letta <noreply@letta.com>
* fix(core): sanitize messages to anthropic in the main path the same way (or similar) to how we do it in the token counter
* fix: also patch poison error in backend by filtering lazily
* fix: remap streaming errors (what the fuck)
* fix: dedupe tool clals
* fix: cleanup, removed try/catch
* feat: squash rebase of OSS PR
* fix: revert changes that weren't on manual rebase
* fix: caught another one
* fix: disable force
* chore: drop print
* fix: just stage-api && just publish-api
* fix: make agent_type consistently an arg in the client
* fix: patch multi-modal support
* chore: put in todo stub
* fix: disable hardcoding for tests
* fix: patch validate agent sync (#4882)
patch validate agent sync
* fix: strip bad merge diff
* fix: revert unrelated diff
* fix: react_v2 naming -> letta_v1 naming
* fix: strip bad merge
---------
Co-authored-by: Kevin Lin <klin5061@gmail.com>
* remove apps/core and apps/fern
* fix precommit
* add submodule updates in workflows
* submodule
* remove core tests
* update core revision
* Add submodules: true to all GitHub workflows
- Ensure all workflows can access git submodules
- Add submodules support to deployment, test, and CI workflows
- Fix YAML syntax issues in workflow files
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Co-Authored-By: Claude <noreply@anthropic.com>
* remove core-lint
* upgrade core with latest main of oss
---------
Co-authored-by: Claude <noreply@anthropic.com>
