native_vector_search

Search document indexes using vector similarity and keyword search. Supports three modes: local SQLite (.swsearch files), local PostgreSQL via pgvector, and remote search servers. Indexes are built with the sw-search CLI tool.

Tools: search_knowledge (default, customizable via tool_name)

Requirements: Search extras installed (pip install "signalwire[search]")

Multi-instance: Yes

Core Parameters

index_file

str

Path to the .swsearch index file (SQLite backend only).

tool_name

strDefaults to search_knowledge

Custom function name for this skill instance. Required when using multiple instances.

build_index

boolDefaults to False

Whether to build the index from source files on startup.

source_dir

str

Directory containing documents to index. Required when build_index=True.

remote_url

str

URL of a remote search server for network mode (e.g., http://localhost:8001).

index_name

strDefaults to default

Name of the index on a remote server. Only used with remote_url.

Search Parameters

count

intDefaults to 5

Number of search results to return (1–20).

similarity_threshold

floatDefaults to 0.0

Minimum similarity score for results (0.0–1.0).

keyword_weight

float

Manual keyword weight (0.0–1.0). Overrides automatic weight detection.

model_name

strDefaults to mini

Embedding model. Shortcuts: "mini" (fastest, 384 dims), "base" or "large" (768 dims). Full model names also accepted.

Content Parameters

global_tags

list[str]Defaults to []

Tags applied to all documents when building the index.

file_types

list[str]

File extensions to include when building the index.

exclude_patterns

list[str]

Glob patterns to exclude when building the index.

max_content_length

intDefaults to 32768

Maximum total response size in characters.

Response Parameters

no_results_message

str

Message returned when no results are found. Supports {query} placeholder.

response_prefix

str

Text prepended to the search response.

response_postfix

str

Text appended to the search response.

response_format_callback

callable

Optional callback to format the response. Must return a string.

description

strDefaults to Search the knowledge base for information

Description of the tool presented to the AI.

hints

list[str]Defaults to []

Additional speech recognition hints for the tool.

NLP Parameters

nlp_backend

strDefaults to basic

NLP backend for query processing: "basic", "spacy", or "nltk". Deprecated — use query_nlp_backend and index_nlp_backend instead.

query_nlp_backend

str

NLP backend for query expansion: "basic", "spacy", or "nltk".

index_nlp_backend

str

NLP backend for indexing: "basic", "spacy", or "nltk".

Backend Parameters

backend

strDefaults to sqlite

Storage backend: "sqlite" or "pgvector". Ignored when remote_url is set.

connection_string

str

PostgreSQL connection string. Required when backend="pgvector".

collection_name

str

PostgreSQL collection name. Required when backend="pgvector".

Other Parameters

verbose

boolDefaults to False

Enable verbose logging during indexing and search.

overwrite

boolDefaults to False

Overwrite existing pgvector collection when building the index.

1 from signalwire import AgentBase
2 
3 class MyAgent(AgentBase):
4     def __init__(self):
5         super().__init__(name="assistant", route="/assistant")
6         self.set_prompt_text("You are a helpful assistant.")
7         self.add_skill("native_vector_search", {
8             "index_file": "/path/to/knowledge.swsearch",
9             "tool_name": "search_docs"
10         })
11 
12 agent = MyAgent()
13 agent.serve()