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This PR fixes GitHub Copilot billing behavior for multi-turn agentic workflows by implementing proper X-Initiator header classification. Previously, all turns consumed a premium request. After this fix, only the first user-initiated turn consumes a premium request; follow-up assistant/tool turns (agent-initiated) do not. **Changes:** 1. **New X-Initiator header classification** (common_utils.py): - Added `determine_x_initiator()` helper that analyzes input messages/items - Returns "user" if messages are user-only (new conversation = premium request) - Returns "agent" if messages contain assistant/tool roles (continuation = free) 2. **Wired X-Initiator header into completion paths**: - Chat API: chat/transformation.py sets X-Initiator from validate_environment() - Responses API: responses/transformation.py sets X-Initiator from validate_environment() - Main completion path: main.py passes X-Initiator through extra_headers 3. **Optional conversation correlation header**: - Added `copilot_conversation_id` metadata parameter for session-scoped billing - Sets X-Conversation-Id header when provided (optional, for caller opt-in) - Verified via API testing that billing is governed by X-Initiator, not session correlation 4. **Comprehensive test coverage**: - Unit tests for X-Initiator classification logic (test_conversation_id.py) - Integration tests for Chat API (test_github_copilot_transformation.py) - Integration tests for Responses API (test_github_copilot_responses_transformation.py) - Billing integration tests (test_github_copilot_billing.py) **Billing impact:** - Multi-turn agentic workflows: 1 premium request instead of N (where N = number of turns) - Single-turn conversations: No change (still 1 premium request) - Tool calls: 1 premium request for the full user→tool→tool_response→assistant exchange Fixes: #25276 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> |
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| .. | ||
| a2a_protocol | ||
| anthropic_interface/exceptions | ||
| caching | ||
| completion_extras | ||
| containers | ||
| enterprise | ||
| expected_fine_tuning_api | ||
| expected_responses_api_request | ||
| experimental_mcp_client | ||
| google_genai | ||
| images | ||
| integrations | ||
| interactions | ||
| litellm_core_utils | ||
| llms | ||
| ocr | ||
| passthrough | ||
| proxy | ||
| responses | ||
| router_strategy | ||
| router_utils | ||
| secret_managers | ||
| test_router | ||
| types | ||
| vector_stores | ||
| __init__.py | ||
| conftest.py | ||
| log.txt | ||
| readme.md | ||
| test_a2a_registry_lookup.py | ||
| test_acompletion_session_reuse_e2e.py | ||
| test_add_deployment_no_master_key.py | ||
| test_aembedding_session_reuse_e2e.py | ||
| test_anthropic_beta_headers_filtering.py | ||
| test_anthropic_skills_transformation.py | ||
| test_azure_video_router.py | ||
| test_chat_ui_responses_session.py | ||
| test_claude_haiku_4_5_config.py | ||
| test_claude_opus_4_6_config.py | ||
| test_constants.py | ||
| test_container_router.py | ||
| test_cost_calculation_log_level.py | ||
| test_cost_calculator.py | ||
| test_count_tokens_public_api.py | ||
| test_deepseek_model_metadata.py | ||
| test_eager_tiktoken_load.py | ||
| test_exception_exports.py | ||
| test_exception_header_preservation.py | ||
| test_exception_mapping_request_attribute.py | ||
| test_filter_out_litellm_params.py | ||
| test_get_blog_posts.py | ||
| test_gpt_image_cost_calculator.py | ||
| test_groq_streaming_encoding.py | ||
| test_lazy_imports.py | ||
| test_litellm_params_reserved_keys.py | ||
| test_logging.py | ||
| test_lowest_latency_zero_tokens.py | ||
| test_main.py | ||
| test_model_cost_aliases.py | ||
| test_model_param_helper.py | ||
| test_model_response_normalization.py | ||
| test_nested_drop_params.py | ||
| test_project_alias_tracking.py | ||
| test_project_tags_pydantic.py | ||
| test_redis.py | ||
| test_register_model_custom_pricing.py | ||
| test_responses_api_bridge_non_stream.py | ||
| test_responses_id_security.py | ||
| test_router.py | ||
| test_router_google_genai.py | ||
| test_router_model_cost_isolation.py | ||
| test_router_order_fallback.py | ||
| test_router_per_deployment_num_retries.py | ||
| test_router_redis_init.py | ||
| test_router_retry_non_retryable_errors.py | ||
| test_router_silent_experiment.py | ||
| test_secret_redaction.py | ||
| test_service_logger.py | ||
| test_setup_wizard.py | ||
| test_shared_session_integration.py | ||
| test_ssl_verify_unit.py | ||
| test_stream_chunk_builder_annotations.py | ||
| test_streaming_connection_cleanup.py | ||
| test_system_message_format_bug.py | ||
| test_utils.py | ||
| test_uuid_helper.py | ||
| test_video_generation.py | ||
| test_xai_responses_auto_routing.py | ||
Testing for litellm/
This directory 1:1 maps the the litellm/ directory, and can only contain mocked tests.
The point of this is to:
- Increase test coverage of
litellm/ - Make it easy for contributors to add tests for the
litellm/package and easily run tests without needing LLM API keys.
File name conventions
litellm/proxy/test_caching_routes.pymaps tolitellm/proxy/caching_routes.pytest_<filename>.pymaps tolitellm/<filename>.py