diff --git a/dev-tools/reconfigurator-cli/src/lib.rs b/dev-tools/reconfigurator-cli/src/lib.rs
index edebf2855f4..e9bd95d67e4 100644
--- a/dev-tools/reconfigurator-cli/src/lib.rs
+++ b/dev-tools/reconfigurator-cli/src/lib.rs
@@ -61,7 +61,7 @@ use omicron_repl_utils::run_repl_from_file;
 use omicron_repl_utils::run_repl_on_stdin;
 use omicron_uuid_kinds::GenericUuid;
 use omicron_uuid_kinds::OmicronZoneUuid;
-use omicron_uuid_kinds::ReconfiguratorSimUuid;
+use omicron_uuid_kinds::ReconfiguratorSimStateUuid;
 use omicron_uuid_kinds::SledUuid;
 use omicron_uuid_kinds::VnicUuid;
 use omicron_uuid_kinds::{BlueprintUuid, MupdateOverrideUuid};
@@ -89,7 +89,7 @@ struct ReconfiguratorSim {
     // The simulator currently being used.
     sim: Simulator,
     // The current state.
-    current: ReconfiguratorSimUuid,
+    current: ReconfiguratorSimStateUuid,
     // The current system state
     log: slog::Logger,
 }
@@ -1456,7 +1456,7 @@ enum StateArgs {
 struct StateLogArgs {
     /// Starting state ID (defaults to current state)
     #[clap(long)]
-    from: Option<ReconfiguratorSimUuid>,
+    from: Option<ReconfiguratorSimStateUuid>,
 
     /// Limit number of states to display
     #[clap(long, short = 'n')]
@@ -2829,7 +2829,7 @@ fn cmd_state_switch(
     args: StateSwitchArgs,
 ) -> anyhow::Result<Option<String>> {
     // Try parsing as a full UUID first, then fall back to prefix matching.
-    let target_id = match args.state_id.parse::<ReconfiguratorSimUuid>() {
+    let target_id = match args.state_id.parse::<ReconfiguratorSimStateUuid>() {
         Ok(id) => id,
         Err(_) => sim.sim.get_state_by_prefix(&args.state_id)?,
     };
diff --git a/nexus/reconfigurator/simulation/src/errors.rs b/nexus/reconfigurator/simulation/src/errors.rs
index cab7dc18ef2..e7082c731dc 100644
--- a/nexus/reconfigurator/simulation/src/errors.rs
+++ b/nexus/reconfigurator/simulation/src/errors.rs
@@ -7,7 +7,7 @@ use std::collections::BTreeSet;
 use indent_write::indentable::Indentable as _;
 use itertools::Itertools;
 use omicron_common::api::external::{Generation, Name};
-use omicron_uuid_kinds::ReconfiguratorSimUuid;
+use omicron_uuid_kinds::ReconfiguratorSimStateUuid;
 use swrite::{SWrite, swriteln};
 use thiserror::Error;
 
@@ -170,7 +170,7 @@ impl UnknownZoneNamesError {
 #[derive(Clone, Debug)]
 pub struct StateMatch {
     /// The state ID.
-    pub id: ReconfiguratorSimUuid,
+    pub id: ReconfiguratorSimStateUuid,
     /// The state generation.
     pub generation: Generation,
     /// The state description.
diff --git a/nexus/reconfigurator/simulation/src/render_graph.rs b/nexus/reconfigurator/simulation/src/render_graph.rs
index 2ef603fc24b..258b1fc7152 100644
--- a/nexus/reconfigurator/simulation/src/render_graph.rs
+++ b/nexus/reconfigurator/simulation/src/render_graph.rs
@@ -6,7 +6,7 @@
 
 use std::collections::{HashMap, HashSet};
 
-use omicron_uuid_kinds::ReconfiguratorSimUuid;
+use omicron_uuid_kinds::ReconfiguratorSimStateUuid;
 use renderdag::{Ancestor, GraphRowRenderer, Renderer};
 use swrite::{SWrite, swrite, swriteln};
 
@@ -17,13 +17,13 @@ use crate::{SimState, Simulator, utils::DisplayUuidPrefix};
 pub struct GraphRenderOptions {
     verbose: bool,
     limit: Option<usize>,
-    from: Option<ReconfiguratorSimUuid>,
-    current: ReconfiguratorSimUuid,
+    from: Option<ReconfiguratorSimStateUuid>,
+    current: ReconfiguratorSimStateUuid,
 }
 
 impl GraphRenderOptions {
     /// Create new render options with the current state.
-    pub fn new(current: ReconfiguratorSimUuid) -> Self {
+    pub fn new(current: ReconfiguratorSimStateUuid) -> Self {
         Self { verbose: false, limit: None, from: None, current }
     }
 
@@ -40,7 +40,10 @@ impl GraphRenderOptions {
     }
 
     /// Set the starting state for ancestry filtering.
-    pub fn with_from(mut self, from: Option<ReconfiguratorSimUuid>) -> Self {
+    pub fn with_from(
+        mut self,
+        from: Option<ReconfiguratorSimStateUuid>,
+    ) -> Self {
         self.from = from;
         self
     }
@@ -59,7 +62,7 @@ impl Simulator {
         &self,
         options: &GraphRenderOptions,
     ) -> Vec<&SimState> {
-        let mut remaining_heads: Vec<ReconfiguratorSimUuid> =
+        let mut remaining_heads: Vec<ReconfiguratorSimStateUuid> =
             if let Some(from_id) = options.from {
                 vec![from_id]
             } else {
@@ -106,10 +109,10 @@ impl Simulator {
     /// Recursively walk a branch, processing merge points along the way.
     fn walk_branch_recursive<'a>(
         &'a self,
-        mut current_id: ReconfiguratorSimUuid,
+        mut current_id: ReconfiguratorSimStateUuid,
         node_to_heads: &HashMap<
-            ReconfiguratorSimUuid,
-            Vec<ReconfiguratorSimUuid>,
+            ReconfiguratorSimStateUuid,
+            Vec<ReconfiguratorSimStateUuid>,
         >,
         walk_state: &mut WalkState<'a>,
     ) {
@@ -151,12 +154,12 @@ impl Simulator {
 /// State accumulated during graph traversal.
 struct WalkState<'a> {
     states: Vec<&'a SimState>,
-    visited: HashSet<ReconfiguratorSimUuid>,
-    remaining_heads: Vec<ReconfiguratorSimUuid>,
+    visited: HashSet<ReconfiguratorSimStateUuid>,
+    remaining_heads: Vec<ReconfiguratorSimStateUuid>,
 }
 
 impl<'a> WalkState<'a> {
-    fn new(heads: Vec<ReconfiguratorSimUuid>) -> Self {
+    fn new(heads: Vec<ReconfiguratorSimStateUuid>) -> Self {
         Self {
             states: Vec::new(),
             visited: HashSet::new(),
diff --git a/nexus/reconfigurator/simulation/src/sim.rs b/nexus/reconfigurator/simulation/src/sim.rs
index 5ee39ac1c4d..c026cd04658 100644
--- a/nexus/reconfigurator/simulation/src/sim.rs
+++ b/nexus/reconfigurator/simulation/src/sim.rs
@@ -8,7 +8,9 @@
 use std::{collections::HashMap, sync::Arc};
 
 use indexmap::IndexSet;
-use omicron_uuid_kinds::{ReconfiguratorSimKind, ReconfiguratorSimUuid};
+use omicron_uuid_kinds::{
+    ReconfiguratorSimStateKind, ReconfiguratorSimStateUuid,
+};
 use typed_rng::TypedUuidRng;
 
 use crate::{
@@ -48,8 +50,8 @@ pub struct Simulator {
     // In the future, it would be interesting to store a chain of every set of
     // heads over time, similar to `jj op log`. That would let us implement undo
     // and restore operations.
-    heads: IndexSet<ReconfiguratorSimUuid>,
-    states: HashMap<ReconfiguratorSimUuid, Arc<SimState>>,
+    heads: IndexSet<ReconfiguratorSimStateUuid>,
+    states: HashMap<ReconfiguratorSimStateUuid, Arc<SimState>>,
     // This state corresponds to `ROOT_ID`.
     //
     // Storing it in the Arc is extremely important! `SimStateBuilder` stores a
@@ -59,7 +61,7 @@ pub struct Simulator {
     // points to the same memory address.
     root_state: Arc<SimState>,
     // Top-level (unversioned) RNG.
-    sim_uuid_rng: TypedUuidRng<ReconfiguratorSimKind>,
+    sim_uuid_rng: TypedUuidRng<ReconfiguratorSimStateKind>,
 }
 
 impl Simulator {
@@ -67,7 +69,8 @@ impl Simulator {
     ///
     /// This is always defined to be the nil UUID, and if queried will always
     /// have a state associated with it.
-    pub const ROOT_ID: ReconfiguratorSimUuid = ReconfiguratorSimUuid::nil();
+    pub const ROOT_ID: ReconfiguratorSimStateUuid =
+        ReconfiguratorSimStateUuid::nil();
 
     /// Create a new simulator with the given initial seed.
     pub fn new(log: &slog::Logger, seed: Option<String>) -> Self {
@@ -77,6 +80,8 @@ impl Simulator {
 
     fn new_inner(log: &slog::Logger, seed: String) -> Self {
         let log = log.new(slog::o!("component" => "SimStore"));
+        // The ReconfiguratorSimStateUuid type used to be ReconfiguratorSimUuid.
+        // Retain the old name in the seed for generated ID compatibility.
         let sim_uuid_rng =
             TypedUuidRng::from_seed(&seed, "ReconfiguratorSimUuid");
         let root_state = SimState::new_root(seed);
@@ -99,12 +104,15 @@ impl Simulator {
 
     /// Get the current heads of the store.
     #[inline]
-    pub fn heads(&self) -> &IndexSet<ReconfiguratorSimUuid> {
+    pub fn heads(&self) -> &IndexSet<ReconfiguratorSimStateUuid> {
         &self.heads
     }
 
     /// Get the state for the given UUID.
-    pub fn get_state(&self, id: ReconfiguratorSimUuid) -> Option<&SimState> {
+    pub fn get_state(
+        &self,
+        id: ReconfiguratorSimStateUuid,
+    ) -> Option<&SimState> {
         if id == Self::ROOT_ID {
             return Some(&self.root_state);
         }
@@ -126,7 +134,7 @@ impl Simulator {
     pub fn get_state_by_prefix(
         &self,
         prefix: &str,
-    ) -> Result<ReconfiguratorSimUuid, StateIdPrefixError> {
+    ) -> Result<ReconfiguratorSimStateUuid, StateIdPrefixError> {
         let mut matching_ids = Vec::new();
 
         if Self::ROOT_ID.to_string().starts_with(prefix) {
@@ -170,7 +178,7 @@ impl Simulator {
     }
 
     #[inline]
-    pub(crate) fn next_sim_uuid(&mut self) -> ReconfiguratorSimUuid {
+    pub(crate) fn next_sim_uuid(&mut self) -> ReconfiguratorSimStateUuid {
         self.sim_uuid_rng.next()
     }
 
diff --git a/nexus/reconfigurator/simulation/src/state.rs b/nexus/reconfigurator/simulation/src/state.rs
index d469849512d..1b3fae36ce1 100644
--- a/nexus/reconfigurator/simulation/src/state.rs
+++ b/nexus/reconfigurator/simulation/src/state.rs
@@ -8,7 +8,7 @@ use anyhow::{Context, anyhow, bail};
 use nexus_inventory::CollectionBuilder;
 use nexus_types::deployment::UnstableReconfiguratorState;
 use omicron_common::api::external::Generation;
-use omicron_uuid_kinds::{CollectionUuid, ReconfiguratorSimUuid};
+use omicron_uuid_kinds::{CollectionUuid, ReconfiguratorSimStateUuid};
 use sync_ptr::SyncConstPtr;
 
 use crate::{
@@ -31,9 +31,9 @@ pub struct SimState {
     // is stored behind an `Arc`. This means that the address stays stable even
     // if the `Simulator` struct is cloned or moved in memory.
     root_state: SyncConstPtr<SimState>,
-    id: ReconfiguratorSimUuid,
+    id: ReconfiguratorSimStateUuid,
     // The parent state that this state was derived from.
-    parent: Option<ReconfiguratorSimUuid>,
+    parent: Option<ReconfiguratorSimStateUuid>,
     // The state's generation, starting from 0.
     //
     // TODO: Should this be its own type to avoid confusion with other
@@ -79,13 +79,13 @@ impl SimState {
 
     #[inline]
     #[must_use]
-    pub fn id(&self) -> ReconfiguratorSimUuid {
+    pub fn id(&self) -> ReconfiguratorSimStateUuid {
         self.id
     }
 
     #[inline]
     #[must_use]
-    pub fn parent(&self) -> Option<ReconfiguratorSimUuid> {
+    pub fn parent(&self) -> Option<ReconfiguratorSimStateUuid> {
         self.parent
     }
 
@@ -185,7 +185,7 @@ pub struct SimStateBuilder {
     // Used to check that the simulator is the same as the one that created
     // this state.
     root_state: SyncConstPtr<SimState>,
-    parent: ReconfiguratorSimUuid,
+    parent: ReconfiguratorSimStateUuid,
     parent_gen: Generation,
     system: SimSystemBuilder,
     config: SimConfigBuilder,
@@ -195,7 +195,7 @@ pub struct SimStateBuilder {
 impl SimStateBuilder {
     #[inline]
     #[must_use]
-    pub fn parent(&self) -> ReconfiguratorSimUuid {
+    pub fn parent(&self) -> ReconfiguratorSimStateUuid {
         self.parent
     }
 
@@ -271,7 +271,7 @@ impl SimStateBuilder {
         self,
         description: String,
         sim: &mut Simulator,
-    ) -> ReconfiguratorSimUuid {
+    ) -> ReconfiguratorSimStateUuid {
         // Check for unrelated histories.
         if !std::ptr::eq(sim.root_state(), self.root_state.inner()) {
             panic!(
diff --git a/uuid-kinds/src/lib.rs b/uuid-kinds/src/lib.rs
index 354c6771494..295fbfc6805 100644
--- a/uuid-kinds/src/lib.rs
+++ b/uuid-kinds/src/lib.rs
@@ -70,7 +70,7 @@ impl_typed_uuid_kinds! {
         Rack = {},
         RackInit = {},
         RackReset = {},
-        ReconfiguratorSim = {},
+        ReconfiguratorSimState = {},
         Region = {},
         SiloGroup = {},
         SiloUser = {},