diff --git a/Cargo.toml b/Cargo.toml
index 3430b2ed7..66788b3a9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -56,3 +56,6 @@ quote = "1.0.18"
 clap = { version = "4.5.3", features = ["derive"] }
 convert_case = "0.6.0"
 walkdir = "2.3.3"
+
+[profile.release]
+debug = true
\ No newline at end of file
diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2000.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2000.ssz
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index 000000000..1a4ef713f
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2001.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2001.ssz
new file mode 100644
index 000000000..1abf7c80a
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2002.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2002.ssz
new file mode 100644
index 000000000..4781861e4
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2003.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2003.ssz
new file mode 100644
index 000000000..338b9e05a
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2004.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2004.ssz
new file mode 100644
index 000000000..edc195e98
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2005.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2005.ssz
new file mode 100644
index 000000000..3e4d61c03
--- /dev/null
+++ b/ethereum-consensus/examples/data/beacon_blocks/block_2005.ssz
@@ -0,0 +1 @@
+{"code":404,"message":"NOT_FOUND: beacon block at slot 2005","stacktraces":[]}
\ No newline at end of file
diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2006.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2006.ssz
new file mode 100644
index 000000000..e83697013
--- /dev/null
+++ b/ethereum-consensus/examples/data/beacon_blocks/block_2006.ssz
@@ -0,0 +1 @@
+{"code":404,"message":"NOT_FOUND: beacon block at slot 2006","stacktraces":[]}
\ No newline at end of file
diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2007.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2007.ssz
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index 000000000..002724626
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2008.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2008.ssz
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2009.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2009.ssz
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2010.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2010.ssz
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2011.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2011.ssz
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index 000000000..7bad9fbc5
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2012.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2012.ssz
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2013.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2013.ssz
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2014.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2014.ssz
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index 000000000..381b4affc
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2015.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2015.ssz
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index 000000000..0c1f00fc1
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2016.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2016.ssz
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index 000000000..8104531c5
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2017.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2017.ssz
new file mode 100644
index 000000000..6900b5cb4
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2018.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2018.ssz
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index 000000000..73749407a
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2019.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2019.ssz
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index 000000000..e1e4ddb68
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2020.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2020.ssz
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index 000000000..03b53f144
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2021.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2021.ssz
new file mode 100644
index 000000000..dabf63d56
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2022.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2022.ssz
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index 000000000..2fe157d3a
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2023.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2023.ssz
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index 000000000..968867bcc
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2024.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2024.ssz
new file mode 100644
index 000000000..7d9e6a59d
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2025.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2025.ssz
new file mode 100644
index 000000000..e1e1bdeae
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2026.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2026.ssz
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index 000000000..e625480d9
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2027.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2027.ssz
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index 000000000..30c189b01
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2028.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2028.ssz
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index 000000000..4ee8c318b
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2029.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2029.ssz
new file mode 100644
index 000000000..71cc8fefe
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2030.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2030.ssz
new file mode 100644
index 000000000..79b41fd37
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2031.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2031.ssz
new file mode 100644
index 000000000..d507614a9
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2032.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2032.ssz
new file mode 100644
index 000000000..995ad9be5
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diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2033.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2033.ssz
new file mode 100644
index 000000000..c8f5e4b8d
--- /dev/null
+++ b/ethereum-consensus/examples/data/beacon_blocks/block_2033.ssz
@@ -0,0 +1 @@
+{"code":404,"message":"NOT_FOUND: beacon block at slot 2033","stacktraces":[]}
\ No newline at end of file
diff --git a/ethereum-consensus/examples/data/beacon_blocks/block_2034.ssz b/ethereum-consensus/examples/data/beacon_blocks/block_2034.ssz
new file mode 100644
index 000000000..ae92f79d4
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diff --git a/ethereum-consensus/examples/data/beacon_states/state_1999.ssz b/ethereum-consensus/examples/data/beacon_states/state_1999.ssz
new file mode 100644
index 000000000..07662900a
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diff --git a/ethereum-consensus/examples/state_transition_mainnet_blocks.rs b/ethereum-consensus/examples/state_transition_mainnet_blocks.rs
new file mode 100644
index 000000000..e68a50bed
--- /dev/null
+++ b/ethereum-consensus/examples/state_transition_mainnet_blocks.rs
@@ -0,0 +1,49 @@
+use ethereum_consensus::{
+    phase0::mainnet as spec,
+    state_transition::mainnet::{Context, Executor},
+    types::{mainnet::SignedBeaconBlock, BeaconState},
+};
+use ssz_rs::prelude::*;
+use std::{error::Error, fs};
+
+fn main() -> std::result::Result<(), Box<dyn Error>> {
+    println!("this example illustrates how the spec applies state transitions to mainnet data.");
+
+    // Read and deserialize prestate
+    let state_path = "./ethereum-consensus/examples/data/beacon_states/state_1999.ssz";
+    let f = fs::read(state_path).unwrap();
+    let prestate = spec::BeaconState::deserialize(&f)?;
+    let prestate = BeaconState::Phase0(prestate);
+
+    // Create executor
+    let context = Context::for_mainnet();
+    let mut executor = Executor::new(prestate, context);
+
+    // Read and process blocks 2000-2034
+    for slot in 2000..=2034 {
+        let block_path =
+            format!("./ethereum-consensus/examples/data/beacon_blocks/block_{}.ssz", slot);
+        let block_bytes = fs::read(&block_path)?;
+
+        // Error handling: skip missed slots
+        if block_bytes.len() < 100 {
+            match std::str::from_utf8(&block_bytes) {
+                Ok(text) if text.contains("NOT_FOUND") => {
+                    println!("Slot {} was skipped (no block produced)", slot);
+                    continue;
+                }
+                _ => {
+                    println!("Unexpected small file for slot {}", slot);
+                    continue;
+                }
+            }
+        }
+
+        // Process block
+        let signed_block = spec::SignedBeaconBlock::deserialize(&block_bytes)?;
+        let block = SignedBeaconBlock::Phase0(signed_block);
+        executor.apply_block(&block)?;
+        println!("Block at slot {} was processed.", slot)
+    }
+    Ok(())
+}