Internal Runtime API References

Introduction

Primitive Value Types

Low-level API requests in Ailoy are made using a JSON-like object as the input argument. The key difference from standard JSON is that binary values can also be included.

In Ailoy, you do not need to manually construct this object. Default types in Python and JavaScript are automatically converted into the appropriate internal representation when a request is sent.

The table below summarizes how types in Python and JavaScript are mapped:

Name	Python	Javascript
null	None	undefined, null
bool	bool	boolean
uint	int	number
int	int	number
float	float	number
double	float	number
string	str	string
array	List	Array
map	Dict	object
ndarray	numpy.ndarray	TypedArray

Iterative output

In Ailoy, function outputs are designed to be iterable by default. A function may produce output either as a single response or as a sequence of multiple packets. The runtime continues to emit packets until it encounters a packet with the field finish: true. If the function completes in one response, that single packet will include finish: true. If the function produces multiple outputs, each packet will be yielded in order, and only the final one will have finish: true.

In this documentation, the flag iterative: true indicates that the function may return multiple output packets. When using such a function, users must consume the output using an iterator loop (e.g., for or async for) to ensure all packets are handled. On the other hand, if iterative is set to false, the function is guaranteed to produce its entire output in a single packet. In this case, it is safe to call the function as a regular method and consume the result directly, without iteration.

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calculator

• Type: Function
• Module: default

A simple calculator function.

Parameters

Name	Type	Description	Required
expression	string	expression to be calculated	✅

Outputs

Name	Type	Description
value	double	calculation result

iterative: false

http_request

• Type: Function
• Module: default

Sends an HTTP(S) request to the specified URL and returns the response.

Parameters

Name	Type	Description	Required
url	string	base url to request	✅
method	string	request method among GET, POST, PUT, DELETE	✅
headers	map	request headers
body	string	request body

Outputs

Name	Type	Description
status_code	uint	HTTP status code
headers	map	response headers
body	bytes	response body

iterative: false

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chromadb_vector_store

• Type: Component
• Module: language

A vector store backed by ChromaDB as the underlying storage and retrieval engine.

Parameters

Name	Type	Description	Required
url	string	URL of the chromadb server	✅
collection	string	Collection name to use (defaults to default_collection)

clear

• Type: Method
• Component: chromadb_vector_store

Clears all items from the vector store.

Parameters

None

Outputs

None

iterative: false

get_by_id

• Type: Method
• Component: chromadb_vector_store

Retrieves a stored item by its unique identifier, returning the embedding, document, and metadata.

Parameters

Name	Type	Description	Required
id	string	Unique identifier of item to find	✅

Outputs

Name	Type	Description
id	string	Unique identifier of the found item
embedding	ndarray	Embedding of the found item
document	string	Document of the found item
metadata	map	Metadata of the found item

iterative: false

insert

• Type: Method
• Component: chromadb_vector_store

Inserts a single embedding into the vector store along with its associated document and optional metadata.

Parameters

Name	Type	Description	Required
embedding	ndarray	embedding to insert	✅
document	string	original document corresponding to embedding	✅
metadata	map or null	arbitrary key-value pairs with JSON-serializable (defaults to null)

Outputs

Name	Type	Description
id	string	Unique identifier of the added item

insert_many

Inserts multiple embeddings into the vector store in a batch. Each item must follow the same format as in insert.

• Type: Method
• Component: chromadb_vector_store

Parameters

Array of objects(map) with insert inputs

Outputs

Name	Type	Description
ids	array<string>	Unique identifiers of the added items (same order with items)

iterative: false

remove

• Type: Method
• Component: chromadb_vector_store

Removes a stored item from the vector store by its unique identifier.

Parameters

Name	Type	Description	Required
id	string	Unique identifier of item to remove	✅

Outputs

None

iterative: false

retrieve

• Type: Method
• Component: chromadb_vector_store

Searches for the most similar items to the given query embedding. Returns the top-k results along with similarity scores.

Parameters

Name	Type	Description	Required
query_embedding	string	Embedding for query message	✅
top_k	uint	Number of results to retrieve at most	✅

Outputs

Name	Type	Description
results	array<map>	Retrieved results where each item consists of id(string): Unique identifier of the item document(string): Document of the item metadata(map or null): Metadata of the item similarity(float): cosine similarity between query embedding

iterative: false

download_model

• Type: Function
• Module: language

Download the model specified by model ID and additional attributes.

Parameters

Name	Type	Description	Required
model_id	string	Model ID	✅
quantization	string	Quantization method Available values: q4f16_1	✅
device	string	Target device Available values: metal, vulkan	✅

Outputs

Name	Type	Description
model_path	string	Path to the downloaded model

faiss_vector_store

• Type: Component
• Module: language

A vector store component using Faiss as the provider.

Parameters

Name	Type	Description	Required
dimension	uint	Dimension of the index	✅

clear

• Type: Method
• Component: faiss_vector_store

Clears all items from the vector store.

Parameters

None

Outputs

None

iterative: false

get_by_id

• Type: Method
• Component: faiss_vector_store

Retrieves a stored item by its unique identifier, returning the embedding, document, and metadata.

Parameters

Name	Type	Description	Required
id	string	Unique identifier of item to find	✅

Outputs

Name	Type	Description
id	string	Unique identifier of the found item
embedding	ndarray	Embedding of the found item
document	string	Document of the found item
metadata	map	Metadata of the found item

iterative: false

insert

• Type: Method
• Component: faiss_vector_store

Inserts a single embedding into the vector store along with its associated document and optional metadata.

Parameters

Name	Type	Description	Required
embedding	ndarray	embedding to insert	✅
document	string	original document corresponding to embedding	✅
metadata	map or null	arbitrary key-value pairs with JSON-serializable (defaults to null)

Outputs

Name	Type	Description
id	string	Unique identifier of the added item

iterative: false

insert_many

• Type: Method
• Component: faiss_vector_store

Inserts multiple embeddings into the vector store in a batch. Each item must follow the same format as in insert.

Parameters

Array of objects(map) with insert inputs

Outputs

Name	Type	Description
ids	array<string>	Unique identifiers of the added items (same order with items)

iterative: false

remove

Removes a stored item from the vector store by its unique identifier.

• Type: Method
• Component: faiss_vector_store

Parameters

Name	Type	Description	Required
id	string	Unique identifier of item to remove	✅

Outputs

None

iterative: false

retrieve

• Type: Method
• Component: faiss_vector_store

Searches for the most similar items to the given query embedding. Returns the top-k results along with similarity scores.

Parameters

Name	Type	Description	Required
query_embedding	string	Embedding for query message	✅
top_k	uint	Number of results to retrieve at most	✅

Outputs

Name	Type	Description
results	array<map>	Retrieved results where each item consists of id(string): Unique identifier of the item document(string): Document of the item metadata(map or null): Metadata of the item similarity(float): cosine similarity between query embedding

iterative: false

list_local_models

• Type: Function
• Module: language

Lists downloaded models in local cache directory.

Parameters

None

Outputs

Name	Type	Description
results	array<map>	Result items where each item consists of the following schema

Name	Type	Description
type	string	Model Type Available values: tvm
model_id	string	Model ID
attributes	map	Model Attributes, including quantization and device for tvm type models
model_path	string	Path to the model
total_bytes	uint	Sum of model's file size in bytes

openai

• Type: Component
• Module: language

A tvm_language_model compatible using the OpenAI API, an LLM component.

Parameters

Name	Type	Description	Required
api_key	string	API key to use on inference	✅
model	string	Model name Available values: gpt-4o (defaults to gpt-4o)

infer

• Type: Method
• Component: openai

Performs inference, generates outputs.

Parameters

Name	Type	Description	Required
messages	array<map>	array of messages (OpenAI API compatible)	✅
tools	array<map>	tools to be used (defaults to empty string)

Outputs

Name	Type	Description
message	map	result message
finish_reason	string	finished reason. Available values: stop, tool_call, length, error

iterative: false

remove_model

• Type: Function
• Module: language

Remove the model specified by model ID.

Parameters

Name	Type	Description	Required
model_id	string	Model ID	✅

Outputs

Name	Type	Description
skipped	bool	Whether the deletion is skipped
model_path	string	Path to the removed model

split_text

• Type: Function
• Module: language
• Ailas: split_text_separators_recursively

Parameters

Name	Type	Description	Required
text	string	Text to split	✅
chunk_size	uint	Chunk size to split (defaults to 4000)
chunk_overlap	uint	Chunk overlap size (defaults to 200)
separators	array<string>	Separators to use (defaults to ["\n\n", "\n", " ", ""])
length_function	string	Length function to use Available values: default, string (defaults to default)

Outputs

Name	Type	Description
chunks	array<string>	Text chunks

iterative: false

split_text_by_separator

• Type: Function
• Module: language

Parameters

Name	Type	Description	Required
text	string	Text to split	✅
chunk_size	uint	Chunk size to split (defaults to 4000)
chunk_overlap	uint	Chunk overlap size (defaults to 200)
separator	string	Separator to use (defaults to \n\n)
length_function	string	Length function to use Available values: default, string (defaults to default)

Outputs

Name	Type	Description
chunks	array<string>	Text chunks

iterative: false

tvm_embedding_model

• Type: Component
• Module: language

Defines an on-device embedding model using TVM as the provider.

Parameters

Name	Type	Description	Required
model	string	Model name to use. Available values: BAAI/bge-m3 (defaults to BAAI/bge-m3)
quantization	string	Quantization method. Available values: q4f16_1 (defaults to q4f16_1)

infer

• Type: Method
• Component: tvm_embedding_model

Performs inference using the embedding model.

Parameters

Name	Type	Description	Required
prompt	string	input text to perform embedding	✅

Outputs

Name	Type	Description
embedding	ndarray	result embedding (1-d array)

iterative: false

tokenize

• Type: Method
• Component: tvm_embedding_model

Performs tokenization on the input text and returns a list of tokens (input of deep learning).

Parameters

Name	Type	Description	Required
prompt	string	input text to perform tokenization	✅

Outputs

Name	Type	Description
tokens	array<int>	result tokens

iterative: false

tvm_language_model

• Type: Component
• Module: language

Defines an on-device language model using TVM as the provider.

Parameters

Name	Type	Description	Required
model	string	Model name to use. Available values: Qwen/Qwen3-0.6B, Qwen/Qwen3-1.7B, Qwen/Qwen3-4B, Qwen/Qwen3-8B	✅
quantization	string	Quantization method. Available values: q4f16_1 (defaults to q4f16_1)
mode	string	Mode to initialize the model Available values: interactive, local, server (defaults to interactive)

apply_chat_template

• Type: Method
• Component: tvm_language_model

Format inputs by it's model type.

Parameters

Name	Type	Description	Required
messages	array<map>	array of messages (OpenAI API compatible)	✅
tools	array<map> or string	tools to be used (defaults to empty string)
reasoning	bool	flag to enable reasoning (defaults to false)

Outputs

Name	Type	Description
prompt	string	result prompt

iterative: false

infer

• Type: Method
• Component: tvm_language_model

Performs inference, generates outputs.

Parameters

Name	Type	Description	Required
messages	array<map>	array of messages (OpenAI API compatible)	✅
tools	array<map> or string	tools to be used (defaults to empty string)
reasoning	bool	flag to enable reasoning (defaults to false)

Outputs

Name	Type	Description
message	map	result message from this iteration
finish_reason	string or null	finished reason. Available values: stop, tool_call, length, error

iterative: true