refactor: replace deprecated lazy_static with std::sync::LazyLock (#734)

Migrate all lazy_static! macro usage to std::sync::LazyLock (stable since
Rust 1.80) across terraphim_rolegraph, terraphim_multi_agent, and
terraphim_automata crates. Removes the lazy_static dependency from all
three Cargo.toml files.

Fixes #136

Co-authored-by: Terraphim AI <noreply@anthropic.com>

Author: AlexMikhalev

Cargo.lock

@@ -55,5 +55,4 @@ medical = ["daachorse", "zstd", "anyhow"]
 [dev-dependencies]
 criterion = "0.8"
 tempfile = "3.27"
-lazy_static = "1.4.0"
 tokio = { version = "1", features = ["io-util", "time","macros","rt","rt-multi-thread"] }

crates/terraphim_automata/Cargo.toml

@@ -29,12 +29,12 @@ use terraphim_automata::{AutomataPath, load_thesaurus};
 use tokio::runtime::Runtime;
 
 #[cfg(feature = "tokio-runtime")]
-lazy_static::lazy_static! {
-    static ref TOKIO_RUNTIME: Runtime = tokio::runtime::Builder::new_current_thread()
+static TOKIO_RUNTIME: std::sync::LazyLock<Runtime> = std::sync::LazyLock::new(|| {
+    tokio::runtime::Builder::new_current_thread()
         .enable_all()
         .build()
-        .unwrap();
-}
+        .unwrap()
+});
 
 // We can use this `block_on` function to run async code in the benchmarks when tokio is available
 #[cfg(feature = "tokio-runtime")]

crates/terraphim_automata/benches/autocomplete_bench.rs

@@ -35,7 +35,6 @@ rand = "0.9"
 # tiktoken-rs = "0.6" # Now handled by rust-genai
 tracing = "0.1"
 regex = "1.12"
-lazy_static = "1.4"
 
 # Terraphim dependencies
 terraphim_types = { path = "../terraphim_types" }

crates/terraphim_multi_agent/Cargo.toml

@@ -1,28 +1,32 @@
-use lazy_static::lazy_static;
 use regex::Regex;
 use std::collections::HashSet;
+use std::sync::LazyLock;
 use tracing::warn;
 
 const MAX_PROMPT_LENGTH: usize = 10_000;
 
-lazy_static! {
-    static ref SUSPICIOUS_PATTERNS: Vec<Regex> = vec![
+static SUSPICIOUS_PATTERNS: LazyLock<Vec<Regex>> = LazyLock::new(|| {
+    vec![
         Regex::new(r"(?i)ignore\s+\s*(previous|above|prior)\s+\s*(instructions|prompts?)").unwrap(),
-        Regex::new(r"(?i)disregard\s+\s*(previous|above|all)\s+\s*(instructions|prompts?)").unwrap(),
+        Regex::new(r"(?i)disregard\s+\s*(previous|above|all)\s+\s*(instructions|prompts?)")
+            .unwrap(),
         Regex::new(r"(?i)system\s*:\s*you\s+\s*are\s+\s*now").unwrap(),
         Regex::new(r"(?i)<\|?im_start\|?>").unwrap(),
         Regex::new(r"(?i)<\|?im_end\|?>").unwrap(),
         Regex::new(r"(?i)###\s*instruction").unwrap(),
         Regex::new(r"(?i)forget\s+\s*(everything|all|previous)").unwrap(),
         Regex::new(r"\x00").unwrap(),
         Regex::new(r"[\x01-\x08\x0B-\x0C\x0E-\x1F\x7F]").unwrap(),
-    ];
-    static ref CONTROL_CHAR_PATTERN: Regex =
-        Regex::new(r"[\x00-\x08\x0B-\x0C\x0E-\x1F\x7F]").unwrap();
+    ]
+});
 
-    // Unicode special characters that can be used for obfuscation or attacks.
-    // HashSet for O(1) per-character lookup.
-    static ref UNICODE_SPECIAL_CHARS: HashSet<char> = [
+static CONTROL_CHAR_PATTERN: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"[\x00-\x08\x0B-\x0C\x0E-\x1F\x7F]").unwrap());
+
+// Unicode special characters that can be used for obfuscation or attacks.
+// HashSet for O(1) per-character lookup.
+static UNICODE_SPECIAL_CHARS: LazyLock<HashSet<char>> = LazyLock::new(|| {
+    [
         '\u{202E}', // RIGHT-TO-LEFT OVERRIDE
         '\u{202D}', // LEFT-TO-RIGHT OVERRIDE
         '\u{202C}', // POP DIRECTIONAL FORMATTING
@@ -43,8 +47,11 @@ lazy_static! {
         '\u{206D}', // ACTIVATE ARABIC FORM SHAPING
         '\u{206E}', // NATIONAL DIGIT SHAPES
         '\u{206F}', // NOMINAL DIGIT SHAPES
-    ].iter().copied().collect();
-}
+    ]
+    .iter()
+    .copied()
+    .collect()
+});
 
 #[derive(Debug, Clone)]
 pub struct SanitizedPrompt {

crates/terraphim_multi_agent/src/prompt_sanitizer.rs

@@ -129,8 +129,8 @@ async fn test_sanitizer_thread_safety() {
 }
 
 #[test]
-fn test_lazy_static_thread_safety() {
-    // Verify lazy_static patterns are initialized safely
+fn test_lazy_lock_thread_safety() {
+    // Verify LazyLock patterns are initialized safely
     // This tests the regex compilation in SUSPICIOUS_PATTERNS
     use std::thread;
 
@@ -150,7 +150,7 @@ fn test_lazy_static_thread_safety() {
 
 #[tokio::test]
 async fn test_unicode_chars_vec_concurrent_access() {
-    // Test concurrent access to UNICODE_SPECIAL_CHARS lazy_static
+    // Test concurrent access to UNICODE_SPECIAL_CHARS LazyLock
     let mut handles = vec![];
 
     for _ in 0..50 {

crates/terraphim_multi_agent/tests/concurrent_security_test.rs

@@ -19,7 +19,6 @@ ahash = { version = "0.8.3", features = ["serde"] }
 aho-corasick = "1.0.2"
 anyhow = { version = "1.0", optional = true }
 itertools = "0.14.0"
-lazy_static = "1.4.0"
 log = "0.4.29"
 memoize = "0.5.1"
 regex = "1.12.3"

crates/terraphim_rolegraph/Cargo.toml

@@ -16,9 +16,8 @@ use terraphim_rolegraph::input::TEST_CORPUS;
 use terraphim_rolegraph::split_paragraphs;
 use terraphim_types::{Document, DocumentType, Thesaurus};
 
-lazy_static::lazy_static! {
-    static ref TOKIO_RUNTIME: Runtime = Runtime::new().unwrap();
-}
+static TOKIO_RUNTIME: std::sync::LazyLock<Runtime> =
+    std::sync::LazyLock::new(|| Runtime::new().unwrap());
 
 // We can use this `block_on` function to run async code in the benchmarks
 // without having to use `async fn`, which is not supported by the `criterion` library.

crates/terraphim_rolegraph/benches/throughput.rs

@@ -1249,11 +1249,8 @@ impl From<RoleGraph> for RoleGraphSync {
     }
 }
 
-#[macro_use]
-extern crate lazy_static;
-lazy_static! {
-    static ref RE: Regex = Regex::new(r"[?!|]\s+").unwrap();
-}
+static RE: std::sync::LazyLock<Regex> =
+    std::sync::LazyLock::new(|| Regex::new(r"[?!|]\s+").unwrap());
 
 pub fn split_paragraphs(paragraphs: &str) -> Vec<&str> {
     let sentences = UnicodeSegmentation::split_sentence_bounds(paragraphs);