chore(lint): add staged lint baseline

ata/methods/Cargo.toml

@@ -3,6 +3,9 @@ name = "ata-methods"
 version = "0.1.0"
 edition = "2021"
 
+[lints]
+workspace = true
+
 [build-dependencies]
 risc0-build = "=3.0.5"
 

ata/methods/guest/Cargo.toml

@@ -5,6 +5,32 @@ edition = "2021"
 
 [workspace]
 
+[lints.rust]
+rust_2018_idioms = { level = "deny", priority = -1 }
+unsafe_code = "forbid"
+
+[lints.clippy]
+all = { level = "deny", priority = -1 }
+allow_attributes = "warn"
+allow_attributes_without_reason = "deny"
+arithmetic_side_effects = "deny"
+as_conversions = "deny"
+cast_possible_truncation = "deny"
+cast_possible_wrap = "deny"
+cast_precision_loss = "warn"
+cast_sign_loss = "deny"
+dbg_macro = "deny"
+indexing_slicing = "deny"
+integer_division = "warn"
+large_enum_variant = "deny"
+match_wildcard_for_single_variants = "warn"
+module_name_repetitions = "allow"
+similar_names = "allow"
+todo = "deny"
+unimplemented = "deny"
+unwrap_used = "deny"
+wildcard_enum_match_arm = "deny"
+
 [[bin]]
 name = "ata"
 path = "src/bin/ata.rs"

ata/methods/guest/src/bin/ata.rs

@@ -1,14 +1,18 @@
-#![no_main]
+#![cfg_attr(not(test), no_main)]
 
 use spel_framework::prelude::*;
 use spel_framework::context::ProgramContext;
 use nssa_core::{account::AccountWithMetadata, program::ProgramId};
 
+#[cfg(not(test))]
 risc0_zkvm::guest::entry!(main);
 
 #[lez_program(instruction = "ata_core::Instruction")]
 mod ata {
-    #[allow(unused_imports)]
+    #[expect(
+        unused_imports,
+        reason = "SPEL instruction macro requires importing parent-scope handler types"
+    )]
     use super::*;
 
     /// Create the Associated Token Account for (token program, owner, definition).