Rehost selected-year gap scalar owner state

README.md

@@ -120,6 +120,8 @@ action label, and the grounded debt/share payload totals used by the shell news
 Calendar stepping now also starts to use that same seam directly: `StepCount` and `AdvanceTo`
 invoke the periodic-boundary service automatically on year rollover, so shellless calendar advance
 can drive the annual finance stack instead of requiring a separate manual service command.
+That stepped world-time path now also refreshes the rehosted selected-year gap scalar owner lane
+instead of leaving `[world+0x4ca2]` as a frozen load-time residue.
 Those bankruptcy branches now follow the grounded owner semantics too: they stamp the bankruptcy
 year and halve live bond principals in place instead of treating bankruptcy as a liquidation path.
 The same save-native live bond-slot surface now also carries per-slot maturity years all the way

crates/rrt-runtime/src/import.rs

@@ -324,6 +324,7 @@ pub fn project_save_slice_to_runtime_state_import(
         },
     };
     let mut state = state;
+    state.refresh_derived_world_state();
     state.refresh_derived_market_state();
     state.validate()?;
 
@@ -459,6 +460,7 @@ pub fn project_save_slice_overlay_to_runtime_state_import(
         },
     };
     let mut state = state;
+    state.refresh_derived_world_state();
     state.refresh_derived_market_state();
     state.validate()?;
 
@@ -932,6 +934,8 @@ fn project_save_slice_components(
                 .as_ref()
                 .map(|state| state.lane_value_f32_text.clone())
                 .unwrap_or_default(),
+            selected_year_gap_scalar_raw_u32: None,
+            selected_year_gap_scalar_value_f32_text: None,
             absolute_counter_restore_kind: Some(
                 if save_slice.world_finance_neighborhood_state.is_some() {
                     "save-direct-world-absolute-counter".to_string()

crates/rrt-runtime/src/runtime.rs

@@ -1398,6 +1398,10 @@ pub struct RuntimeWorldRestoreState {
     #[serde(default)]
     pub economic_tuning_lane_value_f32_text: Vec<String>,
     #[serde(default)]
+    pub selected_year_gap_scalar_raw_u32: Option<u32>,
+    #[serde(default)]
+    pub selected_year_gap_scalar_value_f32_text: Option<String>,
+    #[serde(default)]
     pub absolute_counter_restore_kind: Option<String>,
     #[serde(default)]
     pub absolute_counter_adjustment_context: Option<String>,
@@ -2352,6 +2356,35 @@ impl RuntimeState {
                 .max(profile.net_worth_total);
         }
     }
+
+    pub fn refresh_derived_world_state(&mut self) {
+        let year_word = self
+            .world_restore
+            .packed_year_word_raw_u16
+            .map(u32::from)
+            .or_else(|| {
+                self.world_restore
+                    .current_calendar_tuple_word_raw_u32
+                    .zip(self.world_restore.current_calendar_tuple_word_2_raw_u32)
+                    .map(|(word_0, word_1)| {
+                        u32::from(runtime_decode_packed_calendar_tuple(word_0, word_1).year_word)
+                    })
+            })
+            .unwrap_or(self.calendar.year);
+        if let Some(value) = runtime_world_selected_year_gap_scalar_from_year_word(year_word) {
+            self.world_restore.selected_year_gap_scalar_raw_u32 = Some(value.to_bits());
+            self.world_restore.selected_year_gap_scalar_value_f32_text =
+                Some(format!("{value:.6}"));
+        }
+    }
+}
+
+pub fn runtime_world_selected_year_gap_scalar_from_year_word(year_word: u32) -> Option<f32> {
+    let normalized = (year_word as f64 - 1850.0) / 150.0;
+    if !normalized.is_finite() {
+        return None;
+    }
+    Some(normalized.clamp(1.0 / 3.0, 1.0) as f32)
 }
 
 pub fn runtime_company_stat_value(
@@ -4968,6 +5001,8 @@ mod tests {
                 economic_tuning_mirror_value_f32_text: None,
                 economic_tuning_lane_raw_u32: Vec::new(),
                 economic_tuning_lane_value_f32_text: Vec::new(),
+                selected_year_gap_scalar_raw_u32: None,
+                selected_year_gap_scalar_value_f32_text: None,
                 absolute_counter_restore_kind: Some(
                     "mode-adjusted-selected-year-lane".to_string(),
                 ),
@@ -7954,6 +7989,86 @@ mod tests {
         );
     }
 
+    #[test]
+    fn derives_selected_year_gap_scalar_from_year_word() {
+        assert_eq!(
+            runtime_world_selected_year_gap_scalar_from_year_word(1830),
+            Some((1.0f32 / 3.0).clamp(1.0 / 3.0, 1.0))
+        );
+        assert_eq!(
+            runtime_world_selected_year_gap_scalar_from_year_word(1900),
+            Some((50.0f32 / 150.0).clamp(1.0 / 3.0, 1.0))
+        );
+        assert_eq!(
+            runtime_world_selected_year_gap_scalar_from_year_word(2000),
+            Some(1.0)
+        );
+    }
+
+    #[test]
+    fn refreshes_selected_year_gap_scalar_from_world_restore_calendar() {
+        let mut state = RuntimeState {
+            calendar: CalendarPoint {
+                year: 1830,
+                month_slot: 0,
+                phase_slot: 0,
+                tick_slot: 0,
+            },
+            world_flags: BTreeMap::new(),
+            save_profile: RuntimeSaveProfileState::default(),
+            world_restore: RuntimeWorldRestoreState {
+                packed_year_word_raw_u16: Some(1900),
+                ..RuntimeWorldRestoreState::default()
+            },
+            metadata: BTreeMap::new(),
+            companies: Vec::new(),
+            selected_company_id: None,
+            players: Vec::new(),
+            selected_player_id: None,
+            chairman_profiles: Vec::new(),
+            selected_chairman_profile_id: None,
+            trains: Vec::new(),
+            locomotive_catalog: Vec::new(),
+            cargo_catalog: Vec::new(),
+            territories: Vec::new(),
+            company_territory_track_piece_counts: Vec::new(),
+            company_territory_access: Vec::new(),
+            packed_event_collection: None,
+            event_runtime_records: Vec::new(),
+            candidate_availability: BTreeMap::new(),
+            named_locomotive_availability: BTreeMap::new(),
+            named_locomotive_cost: BTreeMap::new(),
+            all_cargo_price_override: None,
+            named_cargo_price_overrides: BTreeMap::new(),
+            all_cargo_production_override: None,
+            factory_cargo_production_override: None,
+            farm_mine_cargo_production_override: None,
+            named_cargo_production_overrides: BTreeMap::new(),
+            cargo_production_overrides: BTreeMap::new(),
+            world_runtime_variables: BTreeMap::new(),
+            company_runtime_variables: BTreeMap::new(),
+            player_runtime_variables: BTreeMap::new(),
+            territory_runtime_variables: BTreeMap::new(),
+            world_scalar_overrides: BTreeMap::new(),
+            special_conditions: BTreeMap::new(),
+            service_state: RuntimeServiceState::default(),
+        };
+
+        state.refresh_derived_world_state();
+
+        assert_eq!(
+            state.world_restore.selected_year_gap_scalar_raw_u32,
+            Some(((50.0f32 / 150.0).clamp(1.0 / 3.0, 1.0)).to_bits())
+        );
+        assert_eq!(
+            state
+                .world_restore
+                .selected_year_gap_scalar_value_f32_text
+                .as_deref(),
+            Some("0.333333")
+        );
+    }
+
     #[test]
     fn derives_company_unassigned_share_pool_from_market_state_and_holdings() {
         let state = RuntimeState {

crates/rrt-runtime/src/step.rs

@@ -140,6 +140,7 @@ pub fn execute_step_command(
             0
         }
     };
+    state.refresh_derived_world_state();
     state.refresh_derived_market_state();
     let final_summary = RuntimeSummary::from_state(state);
 
@@ -2968,6 +2969,17 @@ mod tests {
             state.world_restore.absolute_counter_mirror_raw_u32,
             Some(885_427_240)
         );
+        assert_eq!(
+            state.world_restore.selected_year_gap_scalar_raw_u32,
+            Some((1.0f32 / 3.0).to_bits())
+        );
+        assert_eq!(
+            state
+                .world_restore
+                .selected_year_gap_scalar_value_f32_text
+                .as_deref(),
+            Some("0.333333")
+        );
     }
 
     #[test]
@@ -3038,6 +3050,17 @@ mod tests {
             state.world_restore.absolute_counter_mirror_raw_u32,
             Some(885_911_040)
         );
+        assert_eq!(
+            state.world_restore.selected_year_gap_scalar_raw_u32,
+            Some((1.0f32 / 3.0).to_bits())
+        );
+        assert_eq!(
+            state
+                .world_restore
+                .selected_year_gap_scalar_value_f32_text
+                .as_deref(),
+            Some("0.333333")
+        );
         assert!(
             result
                 .service_events

crates/rrt-runtime/src/summary.rs

@@ -70,6 +70,8 @@ pub struct RuntimeSummary {
     pub world_restore_economic_tuning_mirror_value_f32_text: Option<String>,
     pub world_restore_economic_tuning_lane_count: usize,
     pub world_restore_economic_tuning_lane_value_f32_text: Vec<String>,
+    pub world_restore_selected_year_gap_scalar_raw_u32: Option<u32>,
+    pub world_restore_selected_year_gap_scalar_value_f32_text: Option<String>,
     pub world_restore_absolute_counter_restore_kind: Option<String>,
     pub world_restore_absolute_counter_adjustment_context: Option<String>,
     pub metadata_count: usize,
@@ -428,6 +430,13 @@ impl RuntimeSummary {
                 .world_restore
                 .economic_tuning_lane_value_f32_text
                 .clone(),
+            world_restore_selected_year_gap_scalar_raw_u32: state
+                .world_restore
+                .selected_year_gap_scalar_raw_u32,
+            world_restore_selected_year_gap_scalar_value_f32_text: state
+                .world_restore
+                .selected_year_gap_scalar_value_f32_text
+                .clone(),
             world_restore_absolute_counter_restore_kind: state
                 .world_restore
                 .absolute_counter_restore_kind
@@ -1747,6 +1756,8 @@ mod tests {
                     "0.01".to_string(),
                     "0.01".to_string(),
                 ],
+                selected_year_gap_scalar_raw_u32: Some(0x3eaaaaab),
+                selected_year_gap_scalar_value_f32_text: Some("0.333333".to_string()),
                 ..RuntimeWorldRestoreState::default()
             },
             metadata: BTreeMap::new(),
@@ -1862,6 +1873,16 @@ mod tests {
             summary.world_restore_economic_tuning_lane_value_f32_text,
             vec!["0.75", "0.007", "0.008", "0.009", "0.01", "0.01"]
         );
+        assert_eq!(
+            summary.world_restore_selected_year_gap_scalar_raw_u32,
+            Some(0x3eaaaaab)
+        );
+        assert_eq!(
+            summary
+                .world_restore_selected_year_gap_scalar_value_f32_text
+                .as_deref(),
+            Some("0.333333")
+        );
     }
 
     #[test]

docs/README.md

@@ -166,6 +166,9 @@ The highest-value next passes are now:
 - shellless calendar advance now also drives that annual seam directly: `StepCount` and `AdvanceTo`
   invoke periodic-boundary service automatically on year rollover instead of requiring a second
   manual service pass to make the annual finance stack run
+- that stepped world-time path now also refreshes the derived selected-year gap scalar owner lane
+  `[world+0x4ca2]`, so later selected-year and periodic-boundary world work can build on runtime
+  state instead of a frozen load-time scalar
 - the project rule on the remaining closure work is now explicit too: when one runtime-facing field
   is still ambiguous, prefer rehosting the owning source state or real reader/setter family first
   instead of guessing another derived leaf field from neighboring raw offsets

docs/rehost-queue.md

@@ -9,15 +9,13 @@ Working rule:
 
 ## Next
 
-- Rehost world time owner-state progression from `CalendarPoint` into `world_restore`:
-  sync `packed_year_word_raw_u16`, `partial_year_progress_raw_u8`, packed calendar tuple words,
-  and absolute counter so shellless stepping advances the same finance/economy reader inputs used
-  by periodic service.
-- Make automatic year-rollover periodic service run against a consistent end-of-year world-time
-  snapshot, then refresh into the new-year snapshot after service commits.
-- Rehost the next shellless periodic-boundary world work under
-  `simulation_service_periodic_boundary_work`, starting with any bounded non-dialog queue/state
-  family that can execute without shell ownership.
+- Rehost the next selected-year periodic-boundary world seam under
+  `simulation_service_periodic_boundary_work`, starting with the save-world economic tuning mirror
+  `[world+0x0bde]` and any directly adjacent selected-year companion bands that can be refreshed
+  from stepped world time without shell ownership.
+- Expand the selected-year world-owner surface beyond the new stepped calendar and gap-scalar
+  lanes when the owning reader/rebuild family is grounded strongly enough to avoid one-off leaf
+  guesses.
 
 ## In Progress
 
@@ -43,6 +41,8 @@ Working rule:
 
 ## Recently Done
 
+- Stepped calendar progression now also refreshes save-world owner time fields, including packed
+  year, packed tuple words, absolute counter, and the derived selected-year gap scalar.
 - Automatic year-rollover calendar stepping now invokes periodic-boundary service.
 - Company cash, confiscation, and major governance effects now write through owner state instead of
   drifting from market/cache readers.

docs/runtime-rehost-plan.md

@@ -215,7 +215,9 @@ flows through save-slice/runtime restore state, so later credit / prime / manage
 build on owned issue state instead of another narrow probe; that same owner surface now also carries
 the saved world absolute counter as first-class runtime restore state instead of shell-context
 metadata, plus the packed year word and partial-year progress lane that feed the annual-finance
-recent-history weighting path. The same owned company annual-finance state
+recent-history weighting path. Stepped world time now also refreshes the derived selected-year gap
+scalar owner lane `[world+0x4ca2]`, so later selected-year periodic-boundary world work can build
+on runtime state instead of a frozen load-time scalar. The same owned company annual-finance state
 now also drives a shared company market reader seam for stock-capital, salary, bonus, and the full
 two-word current/prior issue-calendar tuples, which is a better base for shellless finance
 simulation than summary-only helpers. That same owned annual-finance state now also derives elapsed