Apply the object-level requirements strict decoding mandates: every property is marked required and additionalProperties is set to false.

Extract structured output from tool calls in response.

Used for :object operations to get the final structured output.

@spec extract_stub_tools_from_messages(map()) :: [map()]

Extract stub tool definitions from messages when tools are needed but none provided.

Bedrock and Azure are strict about tool validation in multi-turn conversations. If the conversation history contains tool_use or tool_result blocks, the API requires corresponding tool definitions. This function extracts tool names from the messages and creates minimal stub definitions.

Conditionally add a parameter to a map if the value is not nil.

Add extended thinking configuration to request body if enabled.

Extended thinking doesn't work when tool_choice forces a specific tool. See: https://docs.claude.com/en/docs/build-with-claude/extended-thinking

Prepare context and options for :object operations using a synthetic structured_output tool, forcing tool choice to use it.

This is the best-effort tool-calling path. For grammar-constrained output, callers pass anthropic_structured_output_mode: :json_schema, which the platform adapter (e.g. Google Vertex) handles via the response-level output_config.format path instead of this tool — see structured_output_mode/1 and strict_json_schema/1.

Reduce a compiled schema to the subset that grammar-constrained (output_config.format) decoding supports: strip unsupported keywords and force every property required with additionalProperties: false.

Array length (minItems/maxItems) cannot be expressed, so callers that need an exact count must re-validate it on the response.

Recursively remove JSON Schema keywords that strict (grammar-constrained) decoding does not support.

Strips numeric/length/array constraints (minimum, maximum, minLength, maxLength, minItems, maxItems) and the Gemini-style propertyOrdering annotation (which ReqLLM.Schema.to_json/1 emits but Anthropic's strict tool rejects) from the schema and every nested properties/items subschema.

Resolve the anthropic_structured_output_mode from opts (top-level or nested under :provider_options), defaulting to :auto.