diff --git a/crates/ml/src/trainers/dqn/mod.rs b/crates/ml/src/trainers/dqn/mod.rs
index 171b49517..befee472b 100644
--- a/crates/ml/src/trainers/dqn/mod.rs
+++ b/crates/ml/src/trainers/dqn/mod.rs
@@ -32,6 +32,8 @@ mod risk;
 mod statistics;
 mod trainer;
 mod smoke_tests;
+pub mod state_reset_registry;
+pub use state_reset_registry::{ResetCategory, RegistryEntry, StateResetRegistry};
 
 // Re-export all public items for backward compatibility
 pub use config::{DQNAgentType, DQNHyperparameters};
diff --git a/crates/ml/src/trainers/dqn/state_reset_registry.rs b/crates/ml/src/trainers/dqn/state_reset_registry.rs
new file mode 100644
index 000000000..918891bfc
--- /dev/null
+++ b/crates/ml/src/trainers/dqn/state_reset_registry.rs
@@ -0,0 +1,223 @@
+//! Formal classification of every piece of training-time state by reset lifecycle.
+//! See `docs/superpowers/specs/2026-04-24-dqn-v2-unified-design.md` §4.A.1.
+
+/// Reset lifecycle category for a piece of training-time state.
+///
+/// See `docs/superpowers/specs/2026-04-24-dqn-v2-unified-design.md` §4.A.1.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum ResetCategory {
+    /// Cleared at fold boundary.
+    FoldReset,
+    /// Cleared at validation-window boundary.
+    WindowReset,
+    /// Anneals toward bootstrap value over `decay_bars` bars at fold boundary.
+    SoftReset { decay_bars: u32 },
+    /// Survives across folds (learned weights).
+    TrainingPersist,
+    /// Version-stable across runs; touched only by explicit migration.
+    SchemaContract,
+}
+
+/// One entry in the reset registry.
+#[derive(Debug, Clone, Copy)]
+pub struct RegistryEntry {
+    pub name: &'static str,
+    pub category: ResetCategory,
+    /// Short description — what this state represents. Used in diagnostic dumps.
+    pub description: &'static str,
+}
+
+/// Typed registry classifying every piece of training-time state.
+///
+/// Populated at construction; read-only thereafter. Adding new state requires
+/// adding a new entry here in the same commit that introduces the state
+/// (per Invariant 2 Wire-It-Up).
+#[derive(Debug)]
+pub struct StateResetRegistry {
+    entries: Vec<RegistryEntry>,
+}
+
+impl StateResetRegistry {
+    /// Build the registry with all currently-known training state.
+    pub fn new() -> Self {
+        let entries = vec![
+            // ───── Fold-reset state ─────────────────────────────────────
+            RegistryEntry {
+                name: "kelly_stats",
+                category: ResetCategory::FoldReset,
+                description: "Per-window Kelly win/loss counters (ps[14..18])",
+            },
+            RegistryEntry {
+                name: "plan_state",
+                category: ResetCategory::FoldReset,
+                description: "Val plan_state_buf [N, 7] — plan entry snapshots",
+            },
+            RegistryEntry {
+                name: "eval_q_mean_ema",
+                category: ResetCategory::FoldReset,
+                description: "Per-branch Q-mean EMAs in update_eval_v_range",
+            },
+            RegistryEntry {
+                name: "eval_q_std_ema",
+                category: ResetCategory::FoldReset,
+                description: "Per-branch Q-std EMAs in update_eval_v_range",
+            },
+            RegistryEntry {
+                name: "isv_v_range_slots",
+                category: ResetCategory::FoldReset,
+                description: "ISV[23..31) — v_center/v_half per branch",
+            },
+            RegistryEntry {
+                name: "isv_learning_health",
+                category: ResetCategory::FoldReset,
+                description: "ISV[12] — learning_health EMA",
+            },
+            RegistryEntry {
+                name: "isv_sharpe_ema",
+                category: ResetCategory::FoldReset,
+                description: "ISV[22] — training Sharpe EMA",
+            },
+            RegistryEntry {
+                name: "isv_q_means",
+                category: ResetCategory::FoldReset,
+                description: "ISV[13..22) — per-direction/magnitude Q-mean EMAs + |Q| refs",
+            },
+            // ───── Window-reset state ───────────────────────────────────
+            RegistryEntry {
+                name: "portfolio_state",
+                category: ResetCategory::WindowReset,
+                description: "Per-window portfolio (ps[0..8]) — reset at window start",
+            },
+            RegistryEntry {
+                name: "hold_time",
+                category: ResetCategory::WindowReset,
+                description: "ps[5] / ps[10] — consecutive bars in position",
+            },
+            RegistryEntry {
+                name: "entry_price",
+                category: ResetCategory::WindowReset,
+                description: "ps[3] — entry price of current trade",
+            },
+            // ───── Soft-reset state (anneals across folds) ──────────────
+            RegistryEntry {
+                name: "adaptive_gamma",
+                category: ResetCategory::SoftReset { decay_bars: 500 },
+                description: "training_loop.rs adaptive_gamma — anneals to 0.905 bootstrap",
+            },
+            RegistryEntry {
+                name: "isv_grad_balance_targets",
+                category: ResetCategory::SoftReset { decay_bars: 500 },
+                description: "ISV[31..35) — per-branch grad-norm targets",
+            },
+            RegistryEntry {
+                name: "isv_grad_scale_limit",
+                category: ResetCategory::SoftReset { decay_bars: 500 },
+                description: "ISV[35] — scale-clamp limit EMA",
+            },
+            // ───── Training-persist state ───────────────────────────────
+            RegistryEntry {
+                name: "network_params",
+                category: ResetCategory::TrainingPersist,
+                description: "Online network weights (all tensors)",
+            },
+            RegistryEntry {
+                name: "target_network",
+                category: ResetCategory::TrainingPersist,
+                description: "Target network weights — Polyak EMA of online",
+            },
+            RegistryEntry {
+                name: "adam_momentum",
+                category: ResetCategory::TrainingPersist,
+                description: "Adam optimizer first moment (m)",
+            },
+            RegistryEntry {
+                name: "adam_variance",
+                category: ResetCategory::TrainingPersist,
+                description: "Adam optimizer second moment (v)",
+            },
+            RegistryEntry {
+                name: "adam_step",
+                category: ResetCategory::TrainingPersist,
+                description: "Adam step counter t",
+            },
+            RegistryEntry {
+                name: "replay_buffer",
+                category: ResetCategory::TrainingPersist,
+                description: "PER experience buffer — persists across folds",
+            },
+            // ───── Schema-contract state ────────────────────────────────
+            RegistryEntry {
+                name: "ISV_SCHEMA_VERSION",
+                category: ResetCategory::SchemaContract,
+                description: "ISV[0] — slot-layout schema version (migrated only)",
+            },
+            RegistryEntry {
+                name: "isv_iql_branch_scale_floor",
+                category: ResetCategory::SchemaContract,
+                description: "ISV[36] — IQL branch_scales floor (safety bound, bootstrap-only)",
+            },
+        ];
+        Self { entries }
+    }
+
+    /// Look up a state's category by name. Returns `None` for unknown names
+    /// (caller should assert Some before use to catch typos).
+    pub fn category(&self, name: &str) -> Option<ResetCategory> {
+        self.entries.iter().find(|e| e.name == name).map(|e| e.category)
+    }
+
+    /// Iterator over all entries with `FoldReset` category.
+    /// Used by the fold-boundary reset logic.
+    pub fn fold_reset_entries(&self) -> impl Iterator<Item = &RegistryEntry> {
+        self.entries.iter().filter(|e| e.category == ResetCategory::FoldReset)
+    }
+
+    /// Iterator over all entries with `WindowReset` category.
+    pub fn window_reset_entries(&self) -> impl Iterator<Item = &RegistryEntry> {
+        self.entries.iter().filter(|e| e.category == ResetCategory::WindowReset)
+    }
+
+    /// Iterator over all entries with `SoftReset` category.
+    pub fn soft_reset_entries(&self) -> impl Iterator<Item = &RegistryEntry> {
+        self.entries.iter().filter(|e| matches!(e.category, ResetCategory::SoftReset { .. }))
+    }
+
+    /// All entries (debug/diagnostic dump).
+    pub fn all(&self) -> &[RegistryEntry] {
+        &self.entries
+    }
+}
+
+impl Default for StateResetRegistry {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn registry_classifies_known_state() {
+        let r = StateResetRegistry::new();
+        assert_eq!(r.category("kelly_stats"), Some(ResetCategory::FoldReset));
+        assert_eq!(r.category("adaptive_gamma"), Some(ResetCategory::SoftReset { decay_bars: 500 }));
+        assert_eq!(r.category("network_params"), Some(ResetCategory::TrainingPersist));
+        assert_eq!(r.category("ISV_SCHEMA_VERSION"), Some(ResetCategory::SchemaContract));
+    }
+
+    #[test]
+    fn registry_fold_reset_iterates_only_fold_reset_entries() {
+        let r = StateResetRegistry::new();
+        let names: Vec<&str> = r.fold_reset_entries().map(|e| e.name).collect();
+        assert!(names.contains(&"kelly_stats"));
+        assert!(!names.contains(&"network_params"));
+    }
+
+    #[test]
+    fn registry_unknown_name_returns_none() {
+        let r = StateResetRegistry::new();
+        assert_eq!(r.category("nonexistent_state"), None);
+    }
+}
diff --git a/docs/dqn-wire-up-audit.md b/docs/dqn-wire-up-audit.md
index f7858b709..4a2c89933 100644
--- a/docs/dqn-wire-up-audit.md
+++ b/docs/dqn-wire-up-audit.md
@@ -13,3 +13,4 @@
 | Module / kernel | Consumer path | Classification | Notes |
 |---|---|---|---|
 | (populated during A.5 audit) | | | |
+| `crates/ml/src/trainers/dqn/state_reset_registry.rs` | consumers in Plan 1 Task 3+ (reset_fold_state call) | Wired (consumer added in same plan) | A.1 primary implementation |