diff --git a/Cargo.lock b/Cargo.lock
index 73ebd75d4..35bfc584d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -10524,6 +10524,7 @@ dependencies = [
  "sequencer_core",
  "sequencer_service",
  "sequencer_service_rpc",
+ "sequencer_stake_core",
  "serde",
  "serde_json",
  "tempfile",
diff --git a/artifacts/lez/programs/amm.bin b/artifacts/lez/programs/amm.bin
index 2fdf142e7..0d9e312c7 100644
Binary files a/artifacts/lez/programs/amm.bin and b/artifacts/lez/programs/amm.bin differ
diff --git a/artifacts/lez/programs/associated_token_account.bin b/artifacts/lez/programs/associated_token_account.bin
index 60edcbbdc..e541359e5 100644
Binary files a/artifacts/lez/programs/associated_token_account.bin and b/artifacts/lez/programs/associated_token_account.bin differ
diff --git a/artifacts/lez/programs/authenticated_transfer.bin b/artifacts/lez/programs/authenticated_transfer.bin
index 216282765..532694b14 100644
Binary files a/artifacts/lez/programs/authenticated_transfer.bin and b/artifacts/lez/programs/authenticated_transfer.bin differ
diff --git a/artifacts/lez/programs/bridge.bin b/artifacts/lez/programs/bridge.bin
index c1b8d9884..789a70005 100644
Binary files a/artifacts/lez/programs/bridge.bin and b/artifacts/lez/programs/bridge.bin differ
diff --git a/artifacts/lez/programs/bridge_lock.bin b/artifacts/lez/programs/bridge_lock.bin
index ddadd4ed5..3b832058a 100644
Binary files a/artifacts/lez/programs/bridge_lock.bin and b/artifacts/lez/programs/bridge_lock.bin differ
diff --git a/artifacts/lez/programs/clock.bin b/artifacts/lez/programs/clock.bin
index c47419be3..aabe59be9 100644
Binary files a/artifacts/lez/programs/clock.bin and b/artifacts/lez/programs/clock.bin differ
diff --git a/artifacts/lez/programs/cross_zone_inbox.bin b/artifacts/lez/programs/cross_zone_inbox.bin
index ec1da83fa..649ff500b 100644
Binary files a/artifacts/lez/programs/cross_zone_inbox.bin and b/artifacts/lez/programs/cross_zone_inbox.bin differ
diff --git a/artifacts/lez/programs/cross_zone_outbox.bin b/artifacts/lez/programs/cross_zone_outbox.bin
index ba3649f6b..ef51d4858 100644
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diff --git a/artifacts/lez/programs/faucet.bin b/artifacts/lez/programs/faucet.bin
index 399826ed6..9debd7146 100644
Binary files a/artifacts/lez/programs/faucet.bin and b/artifacts/lez/programs/faucet.bin differ
diff --git a/artifacts/lez/programs/pinata.bin b/artifacts/lez/programs/pinata.bin
index febc6cd86..360a7b2da 100644
Binary files a/artifacts/lez/programs/pinata.bin and b/artifacts/lez/programs/pinata.bin differ
diff --git a/artifacts/lez/programs/pinata_token.bin b/artifacts/lez/programs/pinata_token.bin
index d7a6844eb..699fcd7c0 100644
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diff --git a/artifacts/lez/programs/ping_receiver.bin b/artifacts/lez/programs/ping_receiver.bin
index dc2c06472..cd242c58e 100644
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diff --git a/artifacts/lez/programs/ping_sender.bin b/artifacts/lez/programs/ping_sender.bin
index 0ae3175bd..c7935ee7f 100644
Binary files a/artifacts/lez/programs/ping_sender.bin and b/artifacts/lez/programs/ping_sender.bin differ
diff --git a/artifacts/lez/programs/sequencer_stake.bin b/artifacts/lez/programs/sequencer_stake.bin
index 0e17bedb7..c179dfbb7 100644
Binary files a/artifacts/lez/programs/sequencer_stake.bin and b/artifacts/lez/programs/sequencer_stake.bin differ
diff --git a/artifacts/lez/programs/token.bin b/artifacts/lez/programs/token.bin
index d91927d3e..aba29e5c2 100644
Binary files a/artifacts/lez/programs/token.bin and b/artifacts/lez/programs/token.bin differ
diff --git a/artifacts/lez/programs/vault.bin b/artifacts/lez/programs/vault.bin
index 5ce29680c..608c9dee4 100644
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diff --git a/artifacts/lez/programs/wrapped_token.bin b/artifacts/lez/programs/wrapped_token.bin
index 6633ec468..ce3ea46aa 100644
Binary files a/artifacts/lez/programs/wrapped_token.bin and b/artifacts/lez/programs/wrapped_token.bin differ
diff --git a/integration_tests/tests/multi_sequencer.rs b/integration_tests/tests/multi_sequencer.rs
index 14d50f23b..11211e072 100644
--- a/integration_tests/tests/multi_sequencer.rs
+++ b/integration_tests/tests/multi_sequencer.rs
@@ -3,9 +3,9 @@
     reason = "top-level test functions are conventional for integration tests"
 )]
 
-//! Two sequencers share one channel: both are staked at genesis, so A creates
-//! the channel already accrediting `[A, B]`, B joins and syncs, both produce on
-//! their turns, and A, B and an indexer converge on the same chain.
+//! Two sequencers share one channel: both are staked at genesis, so the channel
+//! is created already accrediting `[A, B]`, B syncs the chain A began, both
+//! produce on their turns, and A, B and an indexer converge on the same chain.
 
 use std::time::Duration;
 
@@ -14,75 +14,68 @@ use indexer_service_rpc::RpcClient as _;
 use integration_tests::{
     config::{self, SequencerPartialConfig},
     init_logger,
-    setup::{SequencerSetup, indexer_client, sequencer_client, setup_bedrock_node, setup_indexer},
 };
-use logos_blockchain_key_management_system_service::keys::{ED25519_SECRET_KEY_SIZE, Ed25519Key};
+use logos_blockchain_key_management_system_service::keys::Ed25519Key;
 use sequencer_core::{
     block_publisher::{Ed25519PublicKey, read_channel_state},
-    config::{BedrockConfig, GenesisAction},
-    sign_genesis_stake,
+    config::BedrockConfig,
 };
 use sequencer_service_rpc::{RpcClient as _, SequencerClient};
+use test_fixtures::{
+    MultiZoneTestContextBuilder, ZoneTestContextBuilder, config::MultiNodeTestContextConfig,
+};
 use testnet_initial_state::{initial_pub_accounts_private_keys, initial_public_user_accounts};
 use tokio::test;
 
 const PHASE_TIMEOUT: Duration = Duration::from_secs(360);
 const POLL_INTERVAL: Duration = Duration::from_secs(2);
 const TRANSFER_AMOUNT: u128 = 10;
-/// ≈4 turn windows past B's join, at `DEFAULT_SEQUENCER_POSTING_TIMEFRAME`
-/// (20 slots ≈ 20 s) and 5 s blocks.
+/// ≈4 turn windows, at the `system_accounts` posting timeframe and 5 s blocks.
 const ROTATION_BLOCKS: u64 = 8;
 
 #[test]
 async fn multi_sequencer_committee_converges() -> Result<()> {
     init_logger();
 
-    let (_bedrock, bedrock_addr) = setup_bedrock_node()
-        .await
-        .context("Failed to set up Bedrock node")?;
-
-    // Fixed seeds so both keys can be staked in genesis before either starts.
-    let key_a = [0xA1_u8; ED25519_SECRET_KEY_SIZE];
-    let key_b = [0xB2_u8; ED25519_SECRET_KEY_SIZE];
-    let pub_a = Ed25519Key::from_bytes(&key_a).public_key();
-    let pub_b = Ed25519Key::from_bytes(&key_b).public_key();
-
-    // Each operator signs its own stake offchain.
-    let genesis = vec![
-        founding_stake(0, stake_key(&pub_a), [0x51_u8; 32])?,
-        founding_stake(1, stake_key(&pub_b), [0x52_u8; 32])?,
-    ];
-
-    let bedrock_config = BedrockConfig {
-        channel_id: config::bedrock_channel_id(),
-        node_url: config::addr_to_url(config::UrlProtocol::Http, bedrock_addr)?,
-        funding_key: config::bedrock_funding_key(),
-        auth: None,
-        priority_fee: sequencer_core::config::default_priority_fee(),
-    };
-
+    let channel = config::bedrock_channel_id();
     let partial = SequencerPartialConfig {
         block_create_timeout: Duration::from_secs(5),
         ..SequencerPartialConfig::default()
     };
 
-    // Phase 1: A solo (it creates the channel), plus an indexer.
-    let (seq_a, _a_home) = SequencerSetup::new(partial, bedrock_addr)
-        .with_genesis(genesis.clone())
-        .with_bedrock_signing_key(key_a)
-        .setup()
+    let ctx = MultiZoneTestContextBuilder::default()
+        .with_zone(
+            ZoneTestContextBuilder::new(MultiNodeTestContextConfig {
+                num_nodes: 2,
+                bedrock_channel: channel,
+            })
+            .disable_wallet()
+            .with_sequencer_partial_config(partial),
+        )
+        .build()
         .await
-        .context("Failed to set up sequencer A")?;
-    let a = sequencer_client(seq_a.addr())?;
-    let (idx, _idx_home) = setup_indexer(bedrock_addr, config::bedrock_channel_id(), None)
-        .await
-        .context("Failed to set up indexer")?;
-    let indexer = indexer_client(idx.addr()).await?;
+        .context("Failed to build the two-sequencer test context")?;
 
-    wait_for_height(&a, 2, "sequencer A to produce past genesis").await?;
+    let a = ctx
+        .sequencer_client_by_node_ids(channel, 0)
+        .context("Missing sequencer A")?;
+    let b = ctx
+        .sequencer_client_by_node_ids(channel, 1)
+        .context("Missing sequencer B")?;
+    let indexer = ctx.indexer_client();
 
-    // Phase 2: the creating tx carried the committee, so both keys are accredited
-    // from block 1 and discovery has nothing to reconcile.
+    let pub_a = Ed25519Key::from_bytes(&config::SEQUENCER_SIGNING_KEY).public_key();
+    let pub_b = Ed25519Key::from_bytes(&config::sequencer_signing_key_from_seed(1)).public_key();
+
+    let bedrock_config = BedrockConfig {
+        channel_id: channel,
+        node_url: config::addr_to_url(config::UrlProtocol::Http, ctx.bedrock_addr())?,
+        funding_key: config::bedrock_funding_key(),
+        auth: None,
+        priority_fee: sequencer_core::config::default_priority_fee(),
+    };
+
+    // Phase 1: both keys accredited from channel creation.
     let mut want = vec![pub_a.to_bytes(), pub_b.to_bytes()];
     want.sort_unstable();
     wait_until("Bedrock to accredit both staked keys", || async {
@@ -90,35 +83,27 @@ async fn multi_sequencer_committee_converges() -> Result<()> {
     })
     .await?;
 
-    // Phase 3: B joins live and syncs the existing chain.
-    let (seq_b, _b_home) = SequencerSetup::new(partial, bedrock_addr)
-        .with_genesis(genesis)
-        .with_bedrock_signing_key(key_b)
-        .setup()
-        .await
-        .context("Failed to set up sequencer B")?;
-    let b = sequencer_client(seq_b.addr())?;
+    // Phase 2: B follows the chain A began.
+    let join_height = a.get_last_block_id().await?.max(1);
+    wait_for_height(b, join_height, "B to sync to A's height").await?;
 
-    let join_height = a.get_last_block_id().await?;
-    wait_for_height(&b, join_height, "B to sync to A's height at join").await?;
-
-    // Phase 4: rotation + convergence over ≈4 turn windows. Without the turn
-    // check, a chain A produces alone satisfies every assertion below.
+    // Phase 3: rotation + convergence; without the turn check, a chain A
+    // produces alone satisfies everything below.
     let rotation_target = join_height + ROTATION_BLOCKS;
     wait_for_height(
-        &a,
+        a,
         rotation_target,
         "the chain to advance across turn windows",
     )
     .await?;
-    wait_for_height(&b, rotation_target, "B to follow across turn windows").await?;
+    wait_for_height(b, rotation_target, "B to follow across turn windows").await?;
     wait_until("the round-robin turn to reach B", || async {
         Ok(committee(&bedrock_config).await?.1 == Some(pub_b))
     })
     .await?;
-    assert_same_chain(&a, &b).await?;
+    assert_same_chain(a, b).await?;
 
-    // Phase 5: a tx submitted only to B is included by B and visible on A.
+    // Phase 4: a tx submitted only to B is included by B and visible on A.
     let accounts = initial_public_user_accounts();
     let from = accounts[0].account_id;
     let to = accounts[1].account_id;
@@ -143,7 +128,7 @@ async fn multi_sequencer_committee_converges() -> Result<()> {
     })
     .await?;
 
-    // Phase 6: the indexer finalizes the same chain, with no stall.
+    // Phase 5: the indexer finalizes the same chain, with no stall.
     wait_until("the indexer to finalize", || async {
         Ok(indexer.get_last_finalized_block_id().await?.unwrap_or(0) >= join_height)
     })
@@ -173,26 +158,6 @@ async fn multi_sequencer_committee_converges() -> Result<()> {
     Ok(())
 }
 
-fn stake_key(key: &Ed25519PublicKey) -> sequencer_stake_core::SequencerKey {
-    sequencer_stake_core::SequencerKey::new(key.to_bytes())
-        .expect("a Bedrock key is a valid Ed25519 public key")
-}
-
-/// Builds a founding-sequencer genesis entry, signing its stake the way an
-/// operator would before handing the entry over.
-fn founding_stake(
-    index: usize,
-    sequencer_key: sequencer_stake_core::SequencerKey,
-    owner_seed: [u8; 32],
-) -> Result<GenesisAction> {
-    let owner = lee::PrivateKey::try_new(owner_seed)?;
-    Ok(GenesisAction::StakeSequencer {
-        sequencer_key,
-        ownership_public_key: lee::PublicKey::new_from_private_key(&owner),
-        stake_signature: sign_genesis_stake(index, sequencer_key, &owner),
-    })
-}
-
 /// Polls `check` until it reports ready, failing with `what` on timeout.
 async fn wait_until<F, Fut>(what: &str, mut check: F) -> Result<()>
 where
diff --git a/integration_tests/tests/sequencer_stake_demo.rs b/integration_tests/tests/sequencer_stake_demo.rs
index c540cca44..9c5733a32 100644
--- a/integration_tests/tests/sequencer_stake_demo.rs
+++ b/integration_tests/tests/sequencer_stake_demo.rs
@@ -18,12 +18,14 @@ use logos_blockchain_zone_sdk::{
     adapter::{Node as _, NodeHttpClient},
 };
 use sequencer_core::config::GenesisAction;
+use sequencer_service_rpc::RpcClient as _;
 use test_fixtures::{
     MultiZoneTestContextBuilder, TestContext, ZoneTestContextBuilder,
     config::{
         MultiNodeTestContextConfig, SequencerPartialConfig, UrlProtocol, addr_to_url,
         bedrock_channel_id,
     },
+    setup::{SequencerSetup, sequencer_client},
 };
 use tokio::test;
 use wallet::AccountIdentity;
@@ -31,6 +33,9 @@ use wallet::AccountIdentity;
 /// Comfortably above `system_accounts::DEFAULT_MINIMUM_SEQUENCER_STAKE`.
 const FUNDING_BALANCE: u128 = 2 * system_accounts::DEFAULT_MINIMUM_SEQUENCER_STAKE;
 
+/// Bedrock signing key of the sequencer that stakes its way in.
+const JOINER_SIGNING_KEY: [u8; 32] = [0x42; 32];
+
 /// Short block cadence for the demo.
 fn fast_blocks() -> SequencerPartialConfig {
     SequencerPartialConfig {
@@ -41,8 +46,7 @@ fn fast_blocks() -> SequencerPartialConfig {
 
 #[test]
 async fn stake_transaction_joins_the_bedrock_committee() -> Result<()> {
-    // Placeholder sequencer identity; must be a genuine Ed25519 point.
-    let demo_sequencer_key = Ed25519Key::from_bytes(&[0x42; 32]).public_key();
+    let demo_sequencer_key = Ed25519Key::from_bytes(&JOINER_SIGNING_KEY).public_key();
     let demo_stake_key = sequencer_stake_core::SequencerKey::new(demo_sequencer_key.to_bytes())
         .expect("a Bedrock key is a valid Ed25519 public key");
 
@@ -194,6 +198,67 @@ async fn stake_transaction_joins_the_bedrock_committee() -> Result<()> {
         channel_state.accredited_keys.len()
     );
 
+    // Only now start a node behind the key, against a channel that already has a chain.
+    let (joiner, _joiner_home) = SequencerSetup::new(fast_blocks(), ctx.bedrock_addr())
+        .with_channel_id(bedrock_channel_id())
+        .with_bedrock_signing_key(JOINER_SIGNING_KEY)
+        .joining_existing_channel()
+        .setup()
+        .await
+        .context("Failed to start the joining sequencer")?;
+    let joiner_client = sequencer_client(joiner.addr())?;
+
+    let joined_at = ctx.sequencer_client().get_last_block_id().await?;
+    poll_until("the joining sequencer to sync the existing chain", 120, {
+        let joiner_client = &joiner_client;
+        move || async move { Ok(joiner_client.get_last_block_id().await? >= joined_at) }
+    })
+    .await?;
+    info!("Joining sequencer synced to block {joined_at}");
+
+    // A tip past `joined_at` under the demo key is a block this node built.
+    poll_until("the joining sequencer to build a block on its turn", 180, {
+        let node = &node;
+        let ctx = &ctx;
+        move || async move {
+            let Some(state) = node.channel_state(bedrock_channel_id()).await? else {
+                return Ok(false);
+            };
+            let turn = state
+                .accredited_keys
+                .get(usize::from(state.tip_sequencer))
+                .copied();
+            Ok(turn == Some(demo_sequencer_key)
+                && ctx.sequencer_client().get_last_block_id().await? > joined_at)
+        }
+    })
+    .await?;
+    info!("Joining sequencer produced a block on its round-robin turn");
+
+    // Both nodes agree, block for block, over everything they share.
+    let leader_client = ctx.sequencer_client();
+    let common = leader_client
+        .get_last_block_id()
+        .await?
+        .min(joiner_client.get_last_block_id().await?);
+    for id in 1..=common {
+        let leader_block = leader_client
+            .get_block(id)
+            .await?
+            .with_context(|| format!("Leader is missing block {id}"))?;
+        let joiner_block = joiner_client
+            .get_block(id)
+            .await?
+            .with_context(|| format!("Joining sequencer is missing block {id}"))?;
+        anyhow::ensure!(
+            leader_block.header.hash == joiner_block.header.hash,
+            "Chain divergence at block {id}: leader {:?} vs joiner {:?}",
+            leader_block.header.hash,
+            joiner_block.header.hash
+        );
+    }
+    info!("Leader and joining sequencer agree on all {common} shared blocks");
+
     // Exit flow: full UnstakeRequest, wait for the committee removal to land on
     // Bedrock, then check the sequencer's own FinalizeUnstake releases the stake.
     //
diff --git a/lez/sequencer/actors/executor/src/actor.rs b/lez/sequencer/actors/executor/src/actor.rs
index e05c1869a..96dc9f039 100644
--- a/lez/sequencer/actors/executor/src/actor.rs
+++ b/lez/sequencer/actors/executor/src/actor.rs
@@ -143,10 +143,10 @@ impl<BP: BlockPublisherTrait + Send + 'static> Message<ProduceBlock> for Executo
             return Ok(());
         }
 
-        info!("Our turn: collecting transactions from mempool, creating block");
+        info!("Our turn: producing a block and any committee update");
         let id = self
             .sequencer
-            .produce_new_block()
+            .run_production_turn()
             .await
             .map_err(Error::BlockProductionFailed)?;
 
diff --git a/lez/sequencer/core/src/lib.rs b/lez/sequencer/core/src/lib.rs
index d15d24786..1199aa705 100644
--- a/lez/sequencer/core/src/lib.rs
+++ b/lez/sequencer/core/src/lib.rs
@@ -662,8 +662,10 @@ impl<BP: BlockPublisherTrait> SequencerCore<BP> {
         })
     }
 
-    /// Produces a new block from mempool transactions and publishes it via zone-sdk.
-    pub async fn produce_new_block(&mut self) -> Result<u64> {
+    /// Runs everything this sequencer owes its turn: builds a block from
+    /// mempool transactions, publishes it via zone-sdk, and submits any
+    /// committee-config update the new state calls for.
+    pub async fn run_production_turn(&mut self) -> Result<u64> {
         let live_accredited_keys = self.live_accredited_sequencer_keys().await;
 
         let BlockWithMeta {
diff --git a/lez/sequencer/core/src/tests.rs b/lez/sequencer/core/src/tests.rs
index c4f28f788..d3727cf05 100644
--- a/lez/sequencer/core/src/tests.rs
+++ b/lez/sequencer/core/src/tests.rs
@@ -191,7 +191,7 @@ async fn common_setup_with_config(
         .await
         .unwrap();
 
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
 
     (sequencer, mempool_handle)
 }
@@ -425,7 +425,7 @@ async fn unfulfilled_deposit_events_are_drained_from_the_store_on_production() {
         "deposit mints are drained from the store, never queued in the mempool"
     );
 
-    let block_id = sequencer.produce_new_block().await.unwrap();
+    let block_id = sequencer.run_production_turn().await.unwrap();
     let block = sequencer
         .store
         .get_block_at_id(block_id)
@@ -477,8 +477,8 @@ async fn a_drained_deposit_is_not_minted_twice_across_turns() {
         })
         .unwrap();
 
-    let first = sequencer.produce_new_block().await.unwrap();
-    let second = sequencer.produce_new_block().await.unwrap();
+    let first = sequencer.run_production_turn().await.unwrap();
+    let second = sequencer.run_production_turn().await.unwrap();
 
     let minted_in = |block_id: u64| {
         sequencer
@@ -527,7 +527,7 @@ async fn an_orphaned_deposit_is_reminted_exactly_once_in_the_replacement() {
         .unwrap();
 
     // Produce the block that mints the deposit; its receipt marks it minted.
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
     let minted_block = sequencer.store.get_block_at_id(2).unwrap().unwrap();
     assert!(
         sequencer.with_state(|s| deposit_already_minted(s, HashType(deposit_op_id))),
@@ -554,7 +554,7 @@ async fn an_orphaned_deposit_is_reminted_exactly_once_in_the_replacement() {
 
     // Next turn: the still-pending record is drained and re-minted on the new
     // head, exactly once.
-    let replacement = sequencer.produce_new_block().await.unwrap();
+    let replacement = sequencer.run_production_turn().await.unwrap();
     let mints = sequencer
         .store
         .get_block_at_id(replacement)
@@ -657,7 +657,7 @@ async fn recorded_dispatches_are_drained_from_the_store_on_production() {
         "deliveries are drained from the store, never queued in the mempool"
     );
 
-    let block_id = sequencer.produce_new_block().await.unwrap();
+    let block_id = sequencer.run_production_turn().await.unwrap();
     let block = sequencer
         .store
         .get_block_at_id(block_id)
@@ -704,8 +704,8 @@ async fn a_delivered_dispatch_is_skipped_on_the_next_turn() {
         .add_pending_cross_zone_dispatches(vec![record])
         .unwrap();
 
-    let first = sequencer.produce_new_block().await.unwrap();
-    let second = sequencer.produce_new_block().await.unwrap();
+    let first = sequencer.run_production_turn().await.unwrap();
+    let second = sequencer.run_production_turn().await.unwrap();
 
     let delivered_in = |block_id: u64| {
         dispatches_in(
@@ -747,7 +747,7 @@ async fn a_dispatch_that_never_executes_is_given_up_on_after_repeated_failures()
         .unwrap();
 
     for attempt in 1..RETIRE_DISPATCH_AFTER_FAILURES {
-        let block_id = sequencer.produce_new_block().await.unwrap();
+        let block_id = sequencer.run_production_turn().await.unwrap();
         let block = sequencer
             .store
             .get_block_at_id(block_id)
@@ -770,7 +770,7 @@ async fn a_dispatch_that_never_executes_is_given_up_on_after_repeated_failures()
     // pending list. Anything else leaves an entry no later block can ever
     // remove, which is how a peer that can make deliveries fail would grow this
     // list without bound.
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
     assert!(
         pending_dispatches(&sequencer).is_empty(),
         "giving up on a delivery must take its record out of the pending list"
@@ -806,7 +806,7 @@ async fn a_dispatch_that_never_executes_is_given_up_on_after_repeated_failures()
     assert_eq!(retained, dead_letters);
 
     // And nothing re-feeds it, so it stops costing a guest execution per block.
-    let block_id = sequencer.produce_new_block().await.unwrap();
+    let block_id = sequencer.run_production_turn().await.unwrap();
     let block = sequencer.store.get_block_at_id(block_id).unwrap().unwrap();
     assert!(dispatches_in(&block).is_empty());
     assert!(pending_dispatches(&sequencer).is_empty());
@@ -830,7 +830,7 @@ async fn a_redelivered_record_is_dropped_once_its_delivery_is_irreversible() {
         .add_pending_cross_zone_dispatches(vec![record.clone()])
         .unwrap();
 
-    let block_id = sequencer.produce_new_block().await.unwrap();
+    let block_id = sequencer.run_production_turn().await.unwrap();
     let delivery_block = sequencer.store.get_block_at_id(block_id).unwrap().unwrap();
     assert_eq!(dispatches_in(&delivery_block), vec![key]);
 
@@ -853,7 +853,7 @@ async fn a_redelivered_record_is_dropped_once_its_delivery_is_irreversible() {
         .unwrap();
     assert_eq!(pending_dispatches(&sequencer).len(), 1);
 
-    let block_id = sequencer.produce_new_block().await.unwrap();
+    let block_id = sequencer.run_production_turn().await.unwrap();
     let block = sequencer.store.get_block_at_id(block_id).unwrap().unwrap();
     assert!(
         dispatches_in(&block).is_empty(),
@@ -882,8 +882,8 @@ async fn a_delivery_still_reversible_keeps_its_record() {
         .add_pending_cross_zone_dispatches(vec![record])
         .unwrap();
 
-    sequencer.produce_new_block().await.unwrap();
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
 
     assert_eq!(
         pending_dispatches(&sequencer)
@@ -963,7 +963,7 @@ async fn a_delivery_too_large_for_any_block_does_not_stall_production() {
         .unwrap();
 
     // Production must get past it to the mempool in the very first block.
-    let block_id = sequencer.produce_new_block().await.unwrap();
+    let block_id = sequencer.run_production_turn().await.unwrap();
     let block = sequencer.store.get_block_at_id(block_id).unwrap().unwrap();
     assert!(
         block.body.transactions.contains(&user_tx),
@@ -973,7 +973,7 @@ async fn a_delivery_too_large_for_any_block_does_not_stall_production() {
 
     // And it is given up on rather than retried for ever.
     for _ in 1..RETIRE_DISPATCH_AFTER_FAILURES {
-        sequencer.produce_new_block().await.unwrap();
+        sequencer.run_production_turn().await.unwrap();
     }
     assert!(
         pending_dispatches(&sequencer).is_empty(),
@@ -1005,7 +1005,7 @@ async fn a_delivery_backlog_is_spread_across_blocks() {
         .add_pending_cross_zone_dispatches(records)
         .unwrap();
 
-    let block_id = sequencer.produce_new_block().await.unwrap();
+    let block_id = sequencer.run_production_turn().await.unwrap();
     let block = sequencer.store.get_block_at_id(block_id).unwrap().unwrap();
     assert_eq!(
         dispatches_in(&block).len(),
@@ -1014,7 +1014,7 @@ async fn a_delivery_backlog_is_spread_across_blocks() {
     );
 
     // Deferred, not dropped: the rest go in the next block.
-    let block_id = sequencer.produce_new_block().await.unwrap();
+    let block_id = sequencer.run_production_turn().await.unwrap();
     let block = sequencer.store.get_block_at_id(block_id).unwrap().unwrap();
     assert_eq!(dispatches_in(&block).len(), 3);
 }
@@ -1163,7 +1163,7 @@ async fn push_tx_into_mempool_blocks_until_mempool_is_full() {
     assert!(poll.is_pending());
 
     // Empty the mempool by producing a block
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
 
     // Resolve the pending push
     assert!(push_fut.await.is_ok());
@@ -1246,7 +1246,7 @@ async fn replay_transactions_are_rejected_in_the_same_block() {
         .unwrap();
 
     // Create block
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
     let block = sequencer
         .store
         .get_block_at_id(sequencer.chain_height())
@@ -1281,7 +1281,7 @@ async fn replay_transactions_are_rejected_in_different_blocks() {
         .push((TransactionOrigin::User, tx.clone()))
         .await
         .unwrap();
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
     let block = sequencer
         .store
         .get_block_at_id(sequencer.chain_height())
@@ -1300,7 +1300,7 @@ async fn replay_transactions_are_rejected_in_different_blocks() {
         .push((TransactionOrigin::User, tx.clone()))
         .await
         .unwrap();
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
     let block = sequencer
         .store
         .get_block_at_id(sequencer.chain_height())
@@ -1342,7 +1342,7 @@ async fn restart_from_storage() {
             .push((TransactionOrigin::User, tx.clone()))
             .await
             .unwrap();
-        sequencer.produce_new_block().await.unwrap();
+        sequencer.run_production_turn().await.unwrap();
         let block = sequencer
             .store
             .get_block_at_id(sequencer.chain_height())
@@ -1380,9 +1380,9 @@ async fn get_pending_blocks() {
     let config = setup_sequencer_config();
     let (mut sequencer, _mempool_handle) =
         SequencerCoreWithMockClients::start_from_config(config).await;
-    sequencer.produce_new_block().await.unwrap();
-    sequencer.produce_new_block().await.unwrap();
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
     assert_eq!(sequencer.get_pending_blocks().unwrap().len(), 4);
 }
 
@@ -1391,9 +1391,9 @@ async fn delete_blocks() {
     let config = setup_sequencer_config();
     let (mut sequencer, _mempool_handle) =
         SequencerCoreWithMockClients::start_from_config(config).await;
-    sequencer.produce_new_block().await.unwrap();
-    sequencer.produce_new_block().await.unwrap();
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
 
     let last_finalized_block = 3;
     sequencer
@@ -1429,7 +1429,7 @@ async fn produce_block_with_correct_prev_meta_after_restart() {
             .push((TransactionOrigin::User, tx))
             .await
             .unwrap();
-        sequencer.produce_new_block().await.unwrap();
+        sequencer.run_production_turn().await.unwrap();
 
         // Get the metadata of the last block produced
         sequencer.store.latest_block_meta().unwrap().unwrap()
@@ -1455,7 +1455,7 @@ async fn produce_block_with_correct_prev_meta_after_restart() {
         .unwrap();
 
     // Step 4: Produce new block
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
 
     // Step 5: Verify the new block has correct previous block metadata
     let new_block = sequencer
@@ -1508,7 +1508,7 @@ async fn transactions_touching_clock_account_are_dropped_from_block() {
         .push((TransactionOrigin::User, crafted_clock_tx))
         .await
         .unwrap();
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
 
     let block = sequencer
         .store
@@ -1538,7 +1538,7 @@ async fn user_tx_that_chain_calls_clock_is_dropped() {
         .push((TransactionOrigin::User, deploy_tx))
         .await
         .unwrap();
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
 
     // Build a user transaction that invokes clock_chain_caller, which in turn chain-calls the
     // clock program with the clock accounts. The sequencer should detect that the resulting
@@ -1563,7 +1563,7 @@ async fn user_tx_that_chain_calls_clock_is_dropped() {
         .push((TransactionOrigin::User, user_tx))
         .await
         .unwrap();
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
 
     let block = sequencer
         .store
@@ -1603,7 +1603,7 @@ async fn block_production_aborts_when_clock_account_data_is_corrupted() {
         .unwrap();
 
     // Block production must fail because the appended clock tx cannot execute.
-    let result = sequencer.produce_new_block().await;
+    let result = sequencer.run_production_turn().await;
     assert!(
         result.is_err(),
         "Block production should abort when clock account data is corrupted"
@@ -2154,8 +2154,8 @@ async fn head_rewound_below_published_height_blocks_production() {
     let (mut sequencer, mempool_handle) =
         SequencerCoreWithMockClients::start_from_config(config).await;
 
-    let first = sequencer.produce_new_block().await.unwrap();
-    let published_tip = sequencer.produce_new_block().await.unwrap();
+    let first = sequencer.run_production_turn().await.unwrap();
+    let published_tip = sequencer.run_production_turn().await.unwrap();
     assert_eq!(
         sequencer.store.published_high_water().unwrap(),
         Some(published_tip),
@@ -2312,7 +2312,7 @@ async fn follow_redelivery_of_own_block_is_deduped() {
         .push((TransactionOrigin::User, tx))
         .await
         .unwrap();
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
     let block2 = sequencer.store.get_block_at_id(2).unwrap().unwrap();
 
     // The channel redelivers our own block under the MsgId the mock publisher
@@ -2354,7 +2354,7 @@ async fn follow_orphan_reverts_head_and_requeues_user_txs() {
         .push((TransactionOrigin::User, tx.clone()))
         .await
         .unwrap();
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
     let block2 = sequencer.store.get_block_at_id(2).unwrap().unwrap();
 
     apply_follow_update(
@@ -2410,7 +2410,7 @@ async fn follow_orphan_of_a_finalized_block_requeues_nothing() {
         .push((TransactionOrigin::User, tx))
         .await
         .unwrap();
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
     let block2 = sequencer.store.get_block_at_id(2).unwrap().unwrap();
 
     apply_follow_update(
@@ -2459,7 +2459,7 @@ async fn follow_finalized_own_block_moves_final_tier_and_marks_store() {
         .push((TransactionOrigin::User, tx))
         .await
         .unwrap();
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
     let block2 = sequencer.store.get_block_at_id(2).unwrap().unwrap();
 
     apply_follow_update(
@@ -2503,7 +2503,7 @@ async fn follow_finalized_delivery_drops_its_pending_record() {
         .add_pending_cross_zone_dispatches(vec![record])
         .unwrap();
 
-    let block_id = sequencer.produce_new_block().await.unwrap();
+    let block_id = sequencer.run_production_turn().await.unwrap();
     let delivery_block = sequencer.store.get_block_at_id(block_id).unwrap().unwrap();
     assert_eq!(dispatches_in(&delivery_block), vec![key]);
     assert_eq!(
@@ -2551,7 +2551,7 @@ async fn a_parked_finalized_block_does_not_drop_a_dispatch_record() {
         .push((TransactionOrigin::User, tx))
         .await
         .unwrap();
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
 
     // A skip-ahead block carrying the same delivery: not in head and linking to
     // nothing we hold, so the final tier parks it instead of applying it.
@@ -2630,7 +2630,7 @@ async fn parked_finalized_block_neither_sweeps_the_store_nor_drops_its_deposit_r
         .push((TransactionOrigin::User, tx))
         .await
         .unwrap();
-    sequencer.produce_new_block().await.unwrap();
+    sequencer.run_production_turn().await.unwrap();
 
     let deposit_op_id = HashType([21; 32]);
     let record = PendingDepositEventRecord {
@@ -2709,7 +2709,7 @@ async fn restart_restores_head_tier_and_recovers_from_orphan() {
             .push((TransactionOrigin::User, tx.clone()))
             .await
             .unwrap();
-        sequencer.produce_new_block().await.unwrap();
+        sequencer.run_production_turn().await.unwrap();
         (tx, sequencer.store.get_block_at_id(2).unwrap().unwrap())
     };
 
@@ -2774,7 +2774,7 @@ async fn restart_reanchors_on_the_persisted_final_snapshot() {
             .push((TransactionOrigin::User, tx))
             .await
             .unwrap();
-        sequencer.produce_new_block().await.unwrap();
+        sequencer.run_production_turn().await.unwrap();
         let block2 = sequencer.store.get_block_at_id(2).unwrap().unwrap();
         apply_follow_update(
             &sequencer.store.dbio(),
diff --git a/lez/sequencer/core/src/tests/reconstruction.rs b/lez/sequencer/core/src/tests/reconstruction.rs
index 596c1c26a..f2802ec0b 100644
--- a/lez/sequencer/core/src/tests/reconstruction.rs
+++ b/lez/sequencer/core/src/tests/reconstruction.rs
@@ -58,8 +58,8 @@ async fn reconstructs_missing_channel_blocks_into_fresh_store() {
     let config_a = setup_sequencer_config();
     let (mut seq_a, _handle_a) =
         SequencerCoreWithMockClients::start_from_config(config_a.clone()).await;
-    seq_a.produce_new_block().await.unwrap();
-    seq_a.produce_new_block().await.unwrap();
+    seq_a.run_production_turn().await.unwrap();
+    seq_a.run_production_turn().await.unwrap();
     let tip_a = seq_a.block_store().latest_block_meta().unwrap().unwrap();
 
     let messages = channel_from_store(seq_a.block_store(), 10);
@@ -196,8 +196,8 @@ async fn fails_when_a_below_tip_channel_block_does_not_validate() {
     // A sequencer that committed blocks past genesis but never recorded an anchor.
     let config = setup_sequencer_config();
     let (mut seq, _handle) = SequencerCoreWithMockClients::start_from_config(config.clone()).await;
-    seq.produce_new_block().await.unwrap();
-    seq.produce_new_block().await.unwrap();
+    seq.run_production_turn().await.unwrap();
+    seq.run_production_turn().await.unwrap();
 
     // A below-tip block re-served with a corrupted hash. Holding a different
     // block at that id is not itself grounds to abort — the head tier is
@@ -291,7 +291,7 @@ async fn reconstruction_ignores_a_duplicate_height_the_final_tier_settled() {
     let config_a = setup_sequencer_config();
     let (mut seq_a, _mempool_a) =
         SequencerCoreWithMockClients::start_from_config(config_a.clone()).await;
-    seq_a.produce_new_block().await.unwrap();
+    seq_a.run_production_turn().await.unwrap();
     let tip_a = seq_a.block_store().latest_block_meta().unwrap().unwrap();
     let mut messages = channel_from_store(seq_a.block_store(), 10);
     let settled_slot = messages.last().unwrap().1;
@@ -374,7 +374,7 @@ async fn reconstruction_replaces_a_conflicting_head_block_with_finalized_history
     let config_a = setup_sequencer_config();
     let (mut seq_a, _mempool_a) =
         SequencerCoreWithMockClients::start_from_config(config_a.clone()).await;
-    seq_a.produce_new_block().await.unwrap();
+    seq_a.run_production_turn().await.unwrap();
     let tip_a = seq_a.block_store().latest_block_meta().unwrap().unwrap();
     let messages = channel_from_store(seq_a.block_store(), 10);
     let tip_slot = messages.last().unwrap().1;
@@ -508,7 +508,7 @@ fn deposit_event_record(
 //         .push((TransactionOrigin::Sequencer, deposit_tx))
 //         .await
 //         .unwrap();
-//     seq_a.produce_new_block().await.unwrap();
+//     seq_a.run_production_turn().await.unwrap();
 
 //     let withdraw_tx = build_public_withdraw_tx(
 //         recipient,
@@ -521,7 +521,7 @@ fn deposit_event_record(
 //         .push((TransactionOrigin::User, withdraw_tx.clone()))
 //         .await
 //         .unwrap();
-//     seq_a.produce_new_block().await.unwrap();
+//     seq_a.run_production_turn().await.unwrap();
 
 //     let tip_a = seq_a.block_store().latest_block_meta().unwrap().unwrap();
 //     let messages = channel_from_store(seq_a.block_store(), 10);
@@ -571,7 +571,7 @@ fn deposit_event_record(
 //         "reconstruction must drop the re-delivered pending deposit record"
 //     );
 
-//     seq_b.produce_new_block().await.unwrap();
+//     seq_b.run_production_turn().await.unwrap();
 
 //     let vault_id = vault_core::compute_vault_account_id(programs::vault().id(), recipient);
 //     let bridge_id = system_accounts::bridge_account_id();
@@ -643,7 +643,7 @@ fn deposit_event_record(
 //         .push((TransactionOrigin::User, withdraw_tx.clone()))
 //         .await
 //         .unwrap();
-//     seq_a.produce_new_block().await.unwrap();
+//     seq_a.run_production_turn().await.unwrap();
 
 //     let key = produced_withdraw_key(&withdraw_tx);
 //     // Producing the withdraw counts it as unseen, awaiting its L1 event.
@@ -696,7 +696,7 @@ async fn reconstruction_reconciles_already_finished_deposit() {
         .push((TransactionOrigin::Sequencer, deposit_tx))
         .await
         .unwrap();
-    seq_a.produce_new_block().await.unwrap();
+    seq_a.run_production_turn().await.unwrap();
 
     let messages = channel_from_store(seq_a.block_store(), 10);
     let tip_slot = messages.last().unwrap().1;
@@ -768,7 +768,7 @@ async fn reconstructed_delivery_settles_its_pending_record() {
         .dbio()
         .add_pending_cross_zone_dispatches(vec![record.clone()])
         .unwrap();
-    seq_a.produce_new_block().await.unwrap();
+    seq_a.run_production_turn().await.unwrap();
 
     let tip_a = seq_a.block_store().latest_block_meta().unwrap().unwrap();
     let messages = channel_from_store(seq_a.block_store(), 10);
@@ -818,7 +818,7 @@ async fn reconstructed_delivery_settles_its_pending_record() {
         payload,
         "the reconstructed delivery must reach its target program"
     );
-    seq_b.produce_new_block().await.unwrap();
+    seq_b.run_production_turn().await.unwrap();
     let produced = seq_b
         .block_store()
         .get_block_at_id(tip_b.id + 1)
@@ -847,7 +847,7 @@ async fn a_verified_own_block_settles_its_delivery_records() {
         .add_pending_cross_zone_dispatches(vec![record])
         .unwrap();
 
-    let block_id = seq.produce_new_block().await.unwrap();
+    let block_id = seq.run_production_turn().await.unwrap();
     let block = seq
         .block_store()
         .get_block_at_id(block_id)
@@ -898,8 +898,8 @@ async fn committed_local_against_missing_channel_fails_without_anchor() {
     {
         let (mut seq, _handle) =
             SequencerCoreWithMockClients::start_from_config(config.clone()).await;
-        seq.produce_new_block().await.unwrap();
-        seq.produce_new_block().await.unwrap();
+        seq.run_production_turn().await.unwrap();
+        seq.run_production_turn().await.unwrap();
         assert!(seq.block_store().latest_block_meta().unwrap().unwrap().id > 1);
     } // drop releases the store so we can reopen it
 
diff --git a/lez/sequencer/service/Cargo.toml b/lez/sequencer/service/Cargo.toml
index 6425ffac2..c8edaec26 100644
--- a/lez/sequencer/service/Cargo.toml
+++ b/lez/sequencer/service/Cargo.toml
@@ -45,7 +45,7 @@ mdns = ["sequencer_core/mdns"]
 # Needed only by the submit_stake bin.
 submit_stake = [
   "dep:lee",
-  "dep:programs",
+  "programs",
   "dep:system_accounts",
   "dep:wallet",
   "dep:sequencer_stake_core",
diff --git a/test_fixtures/Cargo.toml b/test_fixtures/Cargo.toml
index 41e82bda7..4d9982123 100644
--- a/test_fixtures/Cargo.toml
+++ b/test_fixtures/Cargo.toml
@@ -16,6 +16,7 @@ lee.workspace = true
 lee_core = { workspace = true, features = ["host"] }
 sequencer_core = { workspace = true, features = ["default", "testnet"] }
 sequencer_service.workspace = true
+sequencer_stake_core.workspace = true
 sequencer_service_rpc = { workspace = true, features = ["client"] }
 wallet.workspace = true
 programs.workspace = true
diff --git a/test_fixtures/fixtures/prebuilt_sequencer_db.dump b/test_fixtures/fixtures/prebuilt_sequencer_db.dump
index 0fe43eded..dc32e1d86 100644
Binary files a/test_fixtures/fixtures/prebuilt_sequencer_db.dump and b/test_fixtures/fixtures/prebuilt_sequencer_db.dump differ
diff --git a/test_fixtures/src/config.rs b/test_fixtures/src/config.rs
index a068c7ad2..9513dd509 100644
--- a/test_fixtures/src/config.rs
+++ b/test_fixtures/src/config.rs
@@ -6,11 +6,13 @@ use indexer_service::{ChannelId, ClientConfig, IndexerConfig};
 use key_protocol::key_management::{KeyChain, secret_holders::SeedHolder};
 use lee::{AccountId, PrivateKey, PublicKey};
 use lee_core::Identifier;
-use logos_blockchain_key_management_system_service::keys::ZkPublicKey;
+use logos_blockchain_key_management_system_service::keys::{Ed25519Key, ZkPublicKey};
 use num_bigint::BigUint;
-use sequencer_core::config::{
-    BedrockConfig, CrossZoneConfig, GenesisAction, GossipConfig, SequencerConfig,
+use sequencer_core::{
+    config::{BedrockConfig, CrossZoneConfig, GenesisAction, GossipConfig, SequencerConfig},
+    sign_genesis_stake,
 };
+use sequencer_stake_core::SequencerKey;
 use url::Url;
 use wallet::config::{MultiSequencerClientConfig, SequencerConnectionData, WalletConfig};
 
@@ -315,6 +317,37 @@ pub fn sequencer_signing_key_from_seed(seed: u32) -> [u8; 32] {
         .unwrap_or_else(|_| unreachable!())
 }
 
+/// Seed of the account owning sequencer `index`'s founding stake.
+fn founding_stake_owner_seed(index: usize) -> [u8; 32] {
+    if index == 0 {
+        return SEQUENCER_STAKE_KEY;
+    }
+    let mut seed = [0x70; 32];
+    seed[0] = u8::try_from(index).expect("Test contexts never run enough sequencers to overflow");
+    seed
+}
+
+/// Genesis entries staking every sequencer in `sequencer_signing_keys`, so the
+/// creator opens the channel already accrediting all of them.
+pub fn genesis_sequencer_stakes(sequencer_signing_keys: &[[u8; 32]]) -> Result<Vec<GenesisAction>> {
+    sequencer_signing_keys
+        .iter()
+        .enumerate()
+        .map(|(index, signing_key)| {
+            let public_key = Ed25519Key::from_bytes(signing_key).public_key();
+            let sequencer_key = SequencerKey::new(public_key.to_bytes())
+                .context("Sequencer signing key is not a valid Ed25519 point")?;
+            let owner = PrivateKey::try_new(founding_stake_owner_seed(index))
+                .context("Failed to build the founding stake ownership key")?;
+            Ok(GenesisAction::StakeSequencer {
+                sequencer_key,
+                ownership_public_key: PublicKey::new_from_private_key(&owner),
+                stake_signature: sign_genesis_stake(index, sequencer_key, &owner),
+            })
+        })
+        .collect()
+}
+
 /// Generate bedrock channel id from `u32` number via repeating le bytes 8 times.
 ///
 /// Counting from the end of `u32` to guarantee, that it is different from
diff --git a/test_fixtures/src/lib.rs b/test_fixtures/src/lib.rs
index bc67fbc80..b6c31f87a 100644
--- a/test_fixtures/src/lib.rs
+++ b/test_fixtures/src/lib.rs
@@ -10,13 +10,8 @@ use indexer_service::{ChannelId, IndexerHandle};
 use lee::{AccountId, PrivacyPreservingTransaction, PrivateKey};
 use lee_core::Commitment;
 use log::{debug, error};
-use sequencer_core::{
-    block_publisher::{Ed25519Key, post_channel_config},
-    config::GenesisAction,
-};
-use sequencer_service::{
-    BedrockConfig, CrossZoneConfig, GossipConfig, SequencerHandle, default_priority_fee,
-};
+use sequencer_core::config::GenesisAction;
+use sequencer_service::{CrossZoneConfig, GossipConfig, SequencerHandle};
 use sequencer_service_rpc::{RpcClient as _, SequencerClient};
 use serde::Serialize;
 use tempfile::TempDir;
@@ -27,10 +22,7 @@ use wallet::{
 };
 
 use crate::{
-    config::{
-        InitialPrivateAccountForWallet, MultiNodeTestContextConfig, SequencerPartialConfig,
-        bedrock_funding_key,
-    },
+    config::{InitialPrivateAccountForWallet, MultiNodeTestContextConfig, SequencerPartialConfig},
     indexer_client::IndexerClient,
     setup::{
         SequencerSetup, setup_bedrock_node, setup_indexer,
@@ -45,10 +37,6 @@ pub mod setup;
 
 // TODO: Remove this and control time from tests
 pub const TIME_TO_WAIT_FOR_BLOCK_SECONDS: u64 = 12;
-/// 1 s bedrock slots: rotate the turn every ~20 s of tenure; steal a stalled
-/// turn after ~30 s (bounds the stall while B is accredited but not started).
-const POSTING_TIMEFRAME_SLOTS: u32 = 20;
-const POSTING_TIMEOUT_SLOTS: u32 = 30;
 
 pub(crate) const BEDROCK_SERVICE_WITH_OPEN_PORT: &str = "logos-blockchain-node-0";
 pub(crate) const BEDROCK_SERVICE_PORT: u16 = 18080;
@@ -641,6 +629,24 @@ impl ZoneTestContextBuilder {
 
         debug!("Test context setup");
 
+        let mut sequencer_keys = vec![config::SEQUENCER_SIGNING_KEY];
+        sequencer_keys.extend((1..mn_config.num_nodes).map(|i| {
+            config::sequencer_signing_key_from_seed(
+                u32::try_from(i).expect("Not being able to fit is realistically impossible"),
+            )
+        }));
+
+        let genesis_transactions = if mn_config.num_nodes == 1 {
+            genesis_transactions
+        } else {
+            let mut actions = config::genesis_sequencer_stakes(&sequencer_keys)
+                .context("Failed to build the founding sequencer stakes")?;
+            actions.extend(genesis_transactions.unwrap_or_default());
+            // Returning Some() forces a live build below: the prebuilt dump stakes only one
+            // sequencer.
+            Some(actions)
+        };
+
         // The fixture bakes in the default accounts + genesis, so custom genesis / from_scratch
         // must build live. Otherwise load the fixture (fails if it is missing).
         let use_prebuilt = !from_scratch && genesis_transactions.is_none();
@@ -673,16 +679,6 @@ impl ZoneTestContextBuilder {
         let mut sequencer_addrs = vec![];
         let mut sequencer_components = vec![];
 
-        let mut sequencer_keys = vec![];
-
-        sequencer_keys.push(config::SEQUENCER_SIGNING_KEY);
-
-        sequencer_keys.extend((1..mn_config.num_nodes).map(|i| {
-            config::sequencer_signing_key_from_seed(
-                u32::try_from(i).expect("Not being able to fit is realistically impossible"),
-            )
-        }));
-
         // First, need to start a leader.
         let leader_gossip = enable_gossip.then(|| GossipConfig {
             listen_addr: "/ip4/127.0.0.1/udp/0/quic-v1"
@@ -727,16 +723,7 @@ impl ZoneTestContextBuilder {
         sequencer_addrs.push(leader_addr);
         sequencer_components.push(leader_components);
 
-        // Skip posting chain config with just one node.
-        if mn_config.num_nodes != 1 {
-            post_chain_config_with_default_parameters(
-                mn_config.bedrock_channel,
-                bedrock_addr,
-                sequencer_keys.clone(),
-            )
-            .await?;
-        }
-
+        // Followers are already accredited by their genesis stakes.
         for sequencer_key in sequencer_keys.into_iter().skip(1) {
             let (sequencer_addr, sequencer_component) = build_sequencer_components(
                 follower_sequencer_partial_config.unwrap_or(partial_config),
@@ -1070,47 +1057,6 @@ fn dir_size_bytes(path: &Path) -> u64 {
     total
 }
 
-async fn post_chain_config_with_default_parameters(
-    channel_id: ChannelId,
-    bedrock_addr: SocketAddr,
-    sequencer_keys: Vec<[u8; 32]>,
-) -> Result<()> {
-    log::info!(
-        "Sequencer committee is {:?} at {channel_id}",
-        sequencer_keys
-            .iter()
-            .map(|key| Ed25519Key::from_bytes(key).public_key().as_bytes().to_vec())
-            .map(hex::encode)
-            .collect::<Vec<_>>()
-    );
-
-    post_channel_config(
-        &BedrockConfig {
-            channel_id,
-            node_url: config::addr_to_url(config::UrlProtocol::Http, bedrock_addr)?,
-            auth: None,
-            funding_key: bedrock_funding_key(),
-            priority_fee: default_priority_fee(),
-        },
-        &Ed25519Key::from_bytes(
-            sequencer_keys
-                .first()
-                .expect("Must be at least one sequencer"),
-        ),
-        sequencer_keys
-            .clone()
-            .into_iter()
-            .map(|key| Ed25519Key::from_bytes(&key).public_key())
-            .collect(),
-        POSTING_TIMEFRAME_SLOTS,
-        POSTING_TIMEOUT_SLOTS,
-        1,
-        1,
-    )
-    .await
-    .context("Failed to configure the channel committee")
-}
-
 async fn wait_until_genesis(client: &SequencerClient) -> Result<()> {
     log::info!("Waiting for leader to send genesis");
 
diff --git a/test_fixtures/src/setup.rs b/test_fixtures/src/setup.rs
index 7880fe354..6844d4b6a 100644
--- a/test_fixtures/src/setup.rs
+++ b/test_fixtures/src/setup.rs
@@ -77,6 +77,14 @@ impl SequencerSetup {
         self
     }
 
+    /// Build a sequencer that joins a channel another node already created,
+    /// replaying its genesis from the channel instead of the prebuilt dump.
+    #[must_use]
+    pub fn joining_existing_channel(mut self) -> Self {
+        self.genesis_transactions = Some(Vec::new());
+        self
+    }
+
     /// Pre-write a bedrock (Ed25519, 32-byte seed) signing key into the home
     /// before boot, so tests know the sequencer's public key in advance (e.g.
     /// to accredit a committee member that has not started yet).