Add sqlite vector store

Cargo.toml

@@ -1,7 +1,10 @@
 [workspace]
 resolver = "2"
 members = [
-    "rig-core", "rig-lancedb",
-    "rig-mongodb", "rig-neo4j",
+    "rig-core",
+    "rig-lancedb",
+    "rig-mongodb",
+    "rig-neo4j",
     "rig-qdrant",
+    "rig-sqlite",
 ]

rig-sqlite/Cargo.toml

@@ -0,0 +1,24 @@
+[package]
+name = "rig-sqlite"
+version = "0.1.0"
+edition = "2021"
+description = "SQLite-based vector store implementation for the rig framework"
+license = "MIT"
+
+[dependencies]
+rig-core = { path = "../rig-core" }
+rusqlite = { version = "0.32", features = ["bundled"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+sqlite-vec = "0.1"
+tokio-rusqlite = { git = "https://github.com/programatik29/tokio-rusqlite", features = [
+    "bundled",
+] }
+tracing = "0.1"
+zerocopy = "0.8.10"
+chrono = "0.4"
+
+[dev-dependencies]
+anyhow = "1.0.86"
+tokio = { version = "1.38.0", features = ["macros", "rt-multi-thread"] }
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }

rig-sqlite/LICENSE

@@ -0,0 +1,7 @@
+Copyright (c) 2024, Playgrounds Analytics Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

rig-sqlite/README.md

@@ -0,0 +1,46 @@
+<div style="display: flex; align-items: center; justify-content: center;">
+    <picture>
+        <source media="(prefers-color-scheme: dark)" srcset="../img/rig_logo_dark.svg">
+        <source media="(prefers-color-scheme: light)" srcset="../img/rig_logo.svg">
+        <img src="../img/rig_logo.svg" width="200" alt="Rig logo">
+    </picture>
+    <span style="font-size: 48px; margin: 0 20px; font-weight: regular; font-family: Open Sans, sans-serif;"> + </span>
+    <picture>
+        <source media="(prefers-color-scheme: dark)" srcset="https://www.sqlite.org/images/sqlite370_banner.gif">
+        <source media="(prefers-color-scheme: light)" srcset="https://www.sqlite.org/images/sqlite370_banner.gif">
+        <img src="https://www.sqlite.org/images/sqlite370_banner.gif" width="200" alt="SQLite logo">
+    </picture>
+</div>
+
+<br><br>
+
+## Rig-SQLite
+
+This companion crate implements a Rig vector store based on SQLite.
+
+## Usage
+
+Add the companion crate to your `Cargo.toml`, along with the rig-core crate:
+
+```toml
+[dependencies]
+rig-sqlite = "0.1.3"
+rig-core = "0.4.0"
+```
+
+You can also run `cargo add rig-sqlite rig-core` to add the most recent versions of the dependencies to your project.
+
+See the [`/examples`](./examples) folder for usage examples.
+
+## Important Note
+
+Before using the SQLite vector store, you must initialize the SQLite vector extension. Add this code before creating your connection:
+
+```rust
+use rusqlite::ffi::sqlite3_auto_extension;
+use sqlite_vec::sqlite3_vec_init;
+
+unsafe {
+    sqlite3_auto_extension(Some(std::mem::transmute(sqlite3_vec_init as *const ())));
+}
+```