feat: add 4-block jumps, diagonal parkour, high-fall water/ladder support

MoveParkour rewritten to support both cardinal and diagonal sprint jumps
with unified (xOff, zOff) interface. New capabilities:

- 4-block cardinal sprint jumps with edge-approach timing in template
- Diagonal parkour: (2,1), (1,2), (2,2), (3,1), (1,3) in all quadrants
- Ascending parkour extended to dist=3 (cardinal)
- Overshoot safety check after landing destination
- Block parkour from climbable starting blocks (vine/ladder)

MoveDescend/MoveFall enhanced with Baritone-style dynamic fall scanning:
- Water landing: accepts falls of any height into water
- Mid-fall ladder/vine grab: resets effective fall height (<=11 blocks)
- CalculationContext gains MaxFallHeightWater, AllowLadderGrabDuringFall

SprintJumpTemplate gains distance-based approach timing:
- Long jumps (>=3.5 blocks): delays jump until 0.5 blocks from center
- Medium jumps (>=2.5): 0.35 blocks approach
- Landing tolerance scales with jump distance

All movements verified on 1.21.11 local server.

Made-with: Cursor

MinecraftClient/Pathing/Core/AStarPathFinder.cs

@@ -49,17 +49,38 @@ namespace MinecraftClient.Pathing.Core
 
             moves.Add(new MoveFall());
 
+            // Cardinal parkour: 2-4 block sprint jumps along +-X and +-Z
             foreach (int dx in offsets)
             {
+                for (int dist = 2; dist <= 4; dist++)
+                    moves.Add(new MoveParkour(dx * dist, 0));
+                // Ascending: +1Y, dist 2-3 (dist 4 ascend not physically reliable)
                 for (int dist = 2; dist <= 3; dist++)
-                    moves.Add(new MoveParkour(dx, 0, dist));
+                    moves.Add(new MoveParkour(dx * dist, 0, yDelta: 1));
-                moves.Add(new MoveParkour(dx, 0, 2, yDelta: 1));
             }
             foreach (int dz in offsets)
             {
+                for (int dist = 2; dist <= 4; dist++)
+                    moves.Add(new MoveParkour(0, dz * dist));
                 for (int dist = 2; dist <= 3; dist++)
-                    moves.Add(new MoveParkour(0, dz, dist));
+                    moves.Add(new MoveParkour(0, dz * dist, yDelta: 1));
-                moves.Add(new MoveParkour(0, dz, 2, yDelta: 1));
+            }
+
+            // Diagonal parkour: sprint jumps at angles.
+            // Only include combinations with actual distance <= ~3.2 blocks (conservative)
+            foreach (int dx in offsets)
+            {
+                foreach (int dz in offsets)
+                {
+                    // (2,1)/(1,2): sqrt(5) ~ 2.24 blocks
+                    moves.Add(new MoveParkour(dx * 2, dz * 1));
+                    moves.Add(new MoveParkour(dx * 1, dz * 2));
+                    // (2,2): sqrt(8) ~ 2.83 blocks
+                    moves.Add(new MoveParkour(dx * 2, dz * 2));
+                    // (3,1)/(1,3): sqrt(10) ~ 3.16 blocks
+                    moves.Add(new MoveParkour(dx * 3, dz * 1));
+                    moves.Add(new MoveParkour(dx * 1, dz * 3));
+                }
             }
 
             return [.. moves];

MinecraftClient/Pathing/Core/CalculationContext.cs

@@ -15,6 +15,8 @@ namespace MinecraftClient.Pathing.Core
         public bool AllowParkourAscend { get; }
         public bool AllowDiagonalDescend { get; }
         public int MaxFallHeight { get; }
+        public int MaxFallHeightWater { get; }
+        public bool AllowLadderGrabDuringFall { get; }
         public double JumpPenalty { get; }
         public double WalkCost { get; }
         public double SprintCost { get; }
@@ -27,6 +29,8 @@ namespace MinecraftClient.Pathing.Core
             bool allowParkourAscend = false,
             bool allowDiagonalDescend = true,
             int maxFallHeight = 3,
+            int maxFallHeightWater = 256,
+            bool allowLadderGrabDuringFall = true,
             double jumpPenalty = ActionCosts.JumpPenalty)
         {
             World = world;
@@ -35,6 +39,8 @@ namespace MinecraftClient.Pathing.Core
             AllowParkourAscend = allowParkourAscend;
             AllowDiagonalDescend = allowDiagonalDescend;
             MaxFallHeight = maxFallHeight;
+            MaxFallHeightWater = maxFallHeightWater;
+            AllowLadderGrabDuringFall = allowLadderGrabDuringFall;
             JumpPenalty = jumpPenalty;
             WalkCost = ActionCosts.WalkOneBlock;
             SprintCost = CanSprint ? ActionCosts.SprintOneBlock : ActionCosts.WalkOneBlock;

MinecraftClient/Pathing/Execution/Templates/DescendTemplate.cs

@@ -7,6 +7,7 @@ namespace MinecraftClient.Pathing.Execution.Templates
     /// <summary>
     /// Walk off a ledge and drop 1-N blocks to a landing spot.
     /// Walks toward the destination; gravity handles the fall.
+    /// Supports both solid landings and water landings.
     /// </summary>
     public sealed class DescendTemplate : IActionTemplate
     {
@@ -34,24 +35,29 @@ namespace MinecraftClient.Pathing.Execution.Templates
             if (!physics.OnGround)
                 _hasFallen = true;
 
+            // Completion: landed on ground near destination
             if (_hasFallen && physics.OnGround && horizDistSq < 0.5 && Math.Abs(dy) < 0.8)
                 return TemplateState.Complete;
 
+            // Completion: already at destination without falling (e.g., single step down)
             if (horizDistSq < 0.25 && Math.Abs(dy) < 0.5 && physics.OnGround)
                 return TemplateState.Complete;
 
+            // Completion: landed in water near destination
+            if (_hasFallen && physics.InWater && horizDistSq < 0.5 && Math.Abs(dy) < 2.0)
+                return TemplateState.Complete;
+
             // Fail if climbing up instead of descending
             if (pos.Y > ExpectedStart.Y + 2.0)
                 return TemplateState.Failed;
 
-            if (_tickCount > 120)
+            if (_tickCount > 200)
                 return TemplateState.Failed;
 
             if (horizDistSq > 0.01)
             {
                 physics.Yaw = TemplateHelper.CalculateYaw(dx, dz);
                 input.Forward = true;
-                // Don't push into climbable blocks during descent
                 if (physics.OnClimbable)
                     input.Forward = false;
             }

MinecraftClient/Pathing/Execution/Templates/FallTemplate.cs

@@ -6,6 +6,7 @@ namespace MinecraftClient.Pathing.Execution.Templates
 {
     /// <summary>
     /// Vertical free fall at the same X,Z. Waits for the player to land at the target Y.
+    /// Supports both solid ground landings and water landings.
     /// </summary>
     public sealed class FallTemplate : IActionTemplate
     {
@@ -30,9 +31,14 @@ namespace MinecraftClient.Pathing.Execution.Templates
             if (!physics.OnGround)
                 _hasFallen = true;
 
+            // Solid ground landing
             if (_hasFallen && physics.OnGround && Math.Abs(dy) < 1.0)
                 return TemplateState.Complete;
 
+            // Water landing
+            if (_hasFallen && physics.InWater && Math.Abs(dy) < 2.0)
+                return TemplateState.Complete;
+
             if (_tickCount > 200)
                 return TemplateState.Failed;
 

MinecraftClient/Pathing/Execution/Templates/SprintJumpTemplate.cs

@@ -6,7 +6,9 @@ namespace MinecraftClient.Pathing.Execution.Templates
 {
     /// <summary>
     /// Sprint-jump across a gap. Uses a phase-based state machine:
-    /// Approach -> jump on first available ground tick -> Airborne -> Landing check.
+    /// Approach -> jump when ready -> Airborne -> Landing check.
+    /// For long jumps (>= 3.5 blocks), delays the jump until the player
+    /// has moved toward the edge of the starting block for maximum distance.
     /// </summary>
     public sealed class SprintJumpTemplate : IActionTemplate
     {
@@ -15,6 +17,7 @@ namespace MinecraftClient.Pathing.Execution.Templates
         public Location ExpectedStart { get; }
         public Location ExpectedEnd { get; }
 
+        private readonly double _horizDist;
         private int _tickCount;
         private Phase _phase = Phase.Approach;
 
@@ -22,6 +25,9 @@ namespace MinecraftClient.Pathing.Execution.Templates
         {
             ExpectedStart = start;
             ExpectedEnd = end;
+            double dx = end.X - start.X;
+            double dz = end.Z - start.Z;
+            _horizDist = Math.Sqrt(dx * dx + dz * dz);
         }
 
         public TemplateState Tick(Location pos, PlayerPhysics physics, MovementInput input)
@@ -42,10 +48,27 @@ namespace MinecraftClient.Pathing.Execution.Templates
                 case Phase.Approach:
                     if (physics.OnGround)
                     {
-                        input.Jump = true;
+                        double fromStartSq = TemplateHelper.HorizontalDistanceSq(pos, ExpectedStart);
-                        _phase = Phase.Airborne;
+
+                        // For long jumps, delay the jump until the player has sprinted
+                        // toward the block edge. Baritone waits until playerFeet is in
+                        // the next block (~0.5 blocks from center) for dist >= 4.
+                        // For medium jumps (dist 3), wait 0.35 blocks (Baritone: 0.7).
+                        double minApproachSq;
+                        if (_horizDist >= 3.5)
+                            minApproachSq = 0.25; // 0.5 blocks
+                        else if (_horizDist >= 2.5)
+                            minApproachSq = 0.12; // ~0.35 blocks
+                        else
+                            minApproachSq = 0.0;
+
+                        if (fromStartSq >= minApproachSq)
+                        {
+                            input.Jump = true;
+                            _phase = Phase.Airborne;
+                        }
                     }
-                    if (_tickCount > 20)
+                    if (_tickCount > 30)
                         return TemplateState.Failed;
                     break;
 
@@ -56,7 +79,9 @@ namespace MinecraftClient.Pathing.Execution.Templates
                     goto case Phase.Landing;
 
                 case Phase.Landing:
-                    if (horizDistSq < 2.0 && Math.Abs(dy) < 1.0)
+                    // Tolerance scales with jump distance
+                    double horizTolerance = _horizDist >= 3.5 ? 3.0 : 2.0;
+                    if (horizDistSq < horizTolerance && Math.Abs(dy) < 1.0)
                         return TemplateState.Complete;
                     return TemplateState.Failed;
             }

MinecraftClient/Pathing/Moves/Impl/MoveDescend.cs

@@ -1,10 +1,15 @@
+using MinecraftClient.Mapping;
 using MinecraftClient.Pathing.Core;
 
 namespace MinecraftClient.Pathing.Moves.Impl
 {
     /// <summary>
     /// Walk off a ledge and drop 1-N blocks in a cardinal direction.
-    /// Scans downward for a landing spot within MaxFallHeight.
+    /// For short drops (1-MaxFallHeight), uses simple scan.
+    /// For longer drops, delegates to DynamicFallCost which supports:
+    /// - Water/liquid safe landing
+    /// - Mid-fall ladder/vine grabbing (resets effective fall height if ≤ 11 blocks)
+    /// Based on Baritone's MovementDescend.dynamicFallCost design.
     /// </summary>
     public sealed class MoveDescend : IMove
     {
@@ -30,34 +35,117 @@ namespace MinecraftClient.Pathing.Moves.Impl
                 return;
             }
 
-            for (int fallDist = 1; fallDist <= ctx.MaxFallHeight; fallDist++)
+            // Don't descend from ladder/vine (unreliable)
+            Material fromDown = ctx.GetMaterial(x, y - 1, z);
+            if (fromDown.CanBeClimbedOn())
             {
-                int landY = y - fallDist;
+                result.SetImpossible();
+                return;
+            }
 
-                if (ctx.CanWalkOn(destX, landY - 1, destZ))
+            // Check for simple 1-block descend first (most common case)
-                {
+            if (ctx.CanWalkOn(destX, y - 2, destZ))
-                    if (!ctx.CanWalkThrough(destX, landY, destZ))
+            {
-                    {
+                Material landOn = ctx.GetMaterial(destX, y - 2, destZ);
-                        result.SetImpossible();
+                if (MoveHelper.IsHazardous(landOn))
-                        return;
-                    }
-
-                    double cost = ActionCosts.WalkOffBlock + ActionCosts.FallCost(fallDist);
-                    if (MoveHelper.IsHazardous(ctx.GetMaterial(destX, landY - 1, destZ)))
-                    {
-                        result.SetImpossible();
-                        return;
-                    }
-
-                    result.Set(destX, landY, destZ, cost);
-                    return;
-                }
-
-                if (!ctx.CanWalkThrough(destX, landY, destZ))
                 {
                     result.SetImpossible();
                     return;
                 }
+                if (ctx.GetMaterial(destX, y - 1, destZ).CanBeClimbedOn())
+                {
+                    result.SetImpossible();
+                    return;
+                }
+
+                double cost = ActionCosts.WalkOffBlock + ActionCosts.FallCost(1);
+                result.Set(destX, y - 1, destZ, cost);
+                return;
+            }
+
+            // Not a simple 1-block drop, try dynamic fall
+            DynamicFallCost(ctx, x, y, z, destX, destZ, ref result);
+        }
+
+        /// <summary>
+        /// Scan downward for a safe landing, supporting water, ladder grabs, and
+        /// configurable max heights. Based on Baritone's dynamicFallCost.
+        /// </summary>
+        private static void DynamicFallCost(
+            CalculationContext ctx, int x, int y, int z,
+            int destX, int destZ, ref MoveResult result)
+        {
+            if (!ctx.CanWalkThrough(destX, y - 2, destZ))
+            {
+                result.SetImpossible();
+                return;
+            }
+
+            double costSoFar = 0;
+            int effectiveStartHeight = y;
+
+            // Scan starts from fallHeight=3 (2 blocks below the ledge)
+            // because fallHeight=1 and =2 were already checked above
+            int maxScan = ctx.MaxFallHeightWater > ctx.MaxFallHeight
+                ? ctx.MaxFallHeightWater
+                : ctx.MaxFallHeight;
+
+            for (int fallHeight = 3; fallHeight <= maxScan; fallHeight++)
+            {
+                int newY = y - fallHeight;
+                if (newY < -64) break;
+
+                Material ontoMat = ctx.GetMaterial(destX, newY, destZ);
+
+                int unprotectedFallHeight = fallHeight - (y - effectiveStartHeight);
+                double tentativeCost = ActionCosts.WalkOffBlock
+                    + ActionCosts.FallCost(unprotectedFallHeight) + costSoFar;
+
+                // Water landing: safe regardless of height (water absorbs all fall damage)
+                if (MoveHelper.IsWater(ontoMat))
+                {
+                    result.Set(destX, newY, destZ, tentativeCost);
+                    return;
+                }
+
+                // Mid-fall ladder/vine grab: resets effective fall height.
+                // Vanilla: player grabs ladders/vines if falling speed is low enough
+                // (roughly ≤ 11 blocks of unprotected free fall).
+                if (ctx.AllowLadderGrabDuringFall && unprotectedFallHeight <= 11
+                    && ontoMat.CanBeClimbedOn())
+                {
+                    costSoFar += ActionCosts.FallCost(unprotectedFallHeight - 1);
+                    costSoFar += ActionCosts.LadderDownOne;
+                    effectiveStartHeight = newY;
+                    continue;
+                }
+
+                // Air or passable: continue falling
+                if (ctx.CanWalkThrough(destX, newY, destZ))
+                    continue;
+
+                // Hit something solid
+                if (MoveHelper.IsHazardous(ontoMat))
+                {
+                    result.SetImpossible();
+                    return;
+                }
+
+                if (!ctx.CanWalkOn(destX, newY, destZ))
+                {
+                    result.SetImpossible();
+                    return;
+                }
+
+                // Solid landing: allowed if within safe fall height
+                if (unprotectedFallHeight <= ctx.MaxFallHeight + 1)
+                {
+                    result.Set(destX, newY + 1, destZ, tentativeCost);
+                    return;
+                }
+
+                result.SetImpossible();
+                return;
             }
 
             result.SetImpossible();

MinecraftClient/Pathing/Moves/Impl/MoveFall.cs

@@ -1,10 +1,12 @@
+using MinecraftClient.Mapping;
 using MinecraftClient.Pathing.Core;
 
 namespace MinecraftClient.Pathing.Moves.Impl
 {
     /// <summary>
-    /// Straight-down fall at the current X,Z position, for drops greater than MaxFallHeight
+    /// Straight-down fall at the current X,Z position.
-    /// that MoveDescend won't cover. Scans downward for a safe landing.
+    /// Supports water landing and mid-fall ladder/vine grabbing.
+    /// Used for drops where MoveDescend's 1-block horizontal offset doesn't apply.
     /// </summary>
     public sealed class MoveFall : IMove
     {
@@ -28,39 +30,62 @@ namespace MinecraftClient.Pathing.Moves.Impl
                 return;
             }
 
+            double costSoFar = 0;
+            int effectiveStartHeight = y;
+
             for (int fallDist = 1; fallDist <= _maxScanDepth; fallDist++)
             {
                 int landY = y - fallDist;
+                if (landY < -64) break;
 
-                if (ctx.CanWalkOn(x, landY - 1, z))
+                Material ontoMat = ctx.GetMaterial(x, landY, z);
+                int unprotectedFallHeight = fallDist - (y - effectiveStartHeight);
+
+                // Water landing: safe regardless of height
+                if (MoveHelper.IsWater(ontoMat))
                 {
-                    if (!ctx.CanWalkThrough(x, landY, z))
+                    double waterCost = ActionCosts.FallCost(unprotectedFallHeight) + costSoFar;
-                    {
+                    result.Set(x, landY, z, waterCost);
-                        result.SetImpossible();
-                        return;
-                    }
-
-                    if (MoveHelper.IsHazardous(ctx.GetMaterial(x, landY - 1, z)))
-                    {
-                        result.SetImpossible();
-                        return;
-                    }
-
-                    double fallDamageThreshold = 3;
-                    double cost = ActionCosts.FallCost(fallDist);
-
-                    if (fallDist > fallDamageThreshold)
-                        cost += (fallDist - fallDamageThreshold) * 5.0;
-
-                    result.Set(x, landY, z, cost);
                     return;
                 }
 
-                if (!ctx.CanWalkThrough(x, landY, z))
+                // Mid-fall ladder/vine grab (resets effective fall height)
+                if (ctx.AllowLadderGrabDuringFall && unprotectedFallHeight <= 11
+                    && ontoMat.CanBeClimbedOn())
+                {
+                    costSoFar += ActionCosts.FallCost(unprotectedFallHeight - 1);
+                    costSoFar += ActionCosts.LadderDownOne;
+                    effectiveStartHeight = landY;
+                    continue;
+                }
+
+                if (ctx.CanWalkThrough(x, landY, z))
+                    continue;
+
+                // Hit something solid
+                if (!ctx.CanWalkOn(x, landY, z))
                 {
                     result.SetImpossible();
                     return;
                 }
+
+                if (MoveHelper.IsHazardous(ontoMat))
+                {
+                    result.SetImpossible();
+                    return;
+                }
+
+                // Solid landing within safe height
+                if (unprotectedFallHeight <= ctx.MaxFallHeight + 1)
+                {
+                    double cost = ActionCosts.FallCost(unprotectedFallHeight) + costSoFar;
+                    result.Set(x, landY + 1, z, cost);
+                    return;
+                }
+
+                // Too high for safe landing
+                result.SetImpossible();
+                return;
             }
 
             result.SetImpossible();

MinecraftClient/Pathing/Moves/Impl/MoveParkour.cs

@@ -1,11 +1,13 @@
+using System;
+using MinecraftClient.Mapping;
 using MinecraftClient.Pathing.Core;
 
 namespace MinecraftClient.Pathing.Moves.Impl
 {
     /// <summary>
-    /// Sprint jump across a gap of 1-3 blocks (total distance 2-4 blocks forward).
+    /// Sprint jump across a gap in cardinal or diagonal direction.
-    /// Optionally ascends 1 block during the jump (distance 2 only).
+    /// Supports horizontal distances of 2-4 blocks and optional +1Y ascent.
-    /// Requires AllowParkour in context; the first block forward must lack ground.
+    /// Based on Baritone's MovementParkour design with diagonal extensions.
     /// </summary>
     public sealed class MoveParkour : IMove
     {
@@ -14,19 +16,18 @@ namespace MinecraftClient.Pathing.Moves.Impl
         public int ZOffset { get; }
         public bool DynamicY => false;
 
-        private readonly int _distance;
         private readonly int _yDelta;
-        private readonly int _xDir;
-        private readonly int _zDir;
 
-        public MoveParkour(int xDir, int zDir, int distance, int yDelta = 0)
+        /// <summary>
+        /// Create a parkour move with direct XZ offsets.
+        /// For cardinal: one of xOff/zOff is 0, the other is 2..4.
+        /// For diagonal: both non-zero, actual distance should be within sprint jump range.
+        /// </summary>
+        public MoveParkour(int xOff, int zOff, int yDelta = 0)
         {
-            _xDir = xDir;
+            XOffset = xOff;
-            _zDir = zDir;
+            ZOffset = zOff;
-            _distance = distance;
             _yDelta = yDelta;
-            XOffset = xDir * distance;
-            ZOffset = zDir * distance;
         }
 
         public void Calculate(CalculationContext ctx, int x, int y, int z, ref MoveResult result)
@@ -49,16 +50,34 @@ namespace MinecraftClient.Pathing.Moves.Impl
                 return;
             }
 
-            int destX = x + _xDir * _distance;
+            // Don't parkour from climbable blocks (unreliable jump)
-            int destZ = z + _zDir * _distance;
+            Material standingOn = ctx.GetMaterial(x, y - 1, z);
+            if (standingOn.CanBeClimbedOn())
+            {
+                result.SetImpossible();
+                return;
+            }
+
+            int destX = x + XOffset;
+            int destZ = z + ZOffset;
             int destY = y + _yDelta;
 
+            // Head clearance at start (need room to jump)
             if (!ctx.CanWalkThrough(x, y + 2, z))
             {
                 result.SetImpossible();
                 return;
             }
 
+            // Can't jump out of liquid
+            Material atFeet = ctx.GetMaterial(x, y, z);
+            if (atFeet.IsLiquid())
+            {
+                result.SetImpossible();
+                return;
+            }
+
+            // Destination must be standable and passable
             if (!ctx.CanWalkOn(destX, destY - 1, destZ))
             {
                 result.SetImpossible();
@@ -72,42 +91,99 @@ namespace MinecraftClient.Pathing.Moves.Impl
                 return;
             }
 
-            for (int i = 1; i < _distance; i++)
+            int xSign = Math.Sign(XOffset);
-            {
+            int zSign = Math.Sign(ZOffset);
-                int gx = x + _xDir * i;
+            int xAbs = Math.Abs(XOffset);
-                int gz = z + _zDir * i;
+            int zAbs = Math.Abs(ZOffset);
 
-                if (!ctx.CanWalkThrough(gx, y, gz) ||
+            // Check intermediate space for passability (the player's bounding box sweeps
-                    !ctx.CanWalkThrough(gx, y + 1, gz) ||
+            // through a rectangle from start to end; check all blocks in that rectangle)
-                    !ctx.CanWalkThrough(gx, y + 2, gz))
+            for (int i = 0; i <= xAbs; i++)
+            {
+                for (int j = 0; j <= zAbs; j++)
+                {
+                    if (i == 0 && j == 0) continue;
+                    if (i == xAbs && j == zAbs) continue;
+
+                    int gx = x + xSign * i;
+                    int gz = z + zSign * j;
+
+                    if (!ctx.CanWalkThrough(gx, y, gz) ||
+                        !ctx.CanWalkThrough(gx, y + 1, gz) ||
+                        !ctx.CanWalkThrough(gx, y + 2, gz))
+                    {
+                        result.SetImpossible();
+                        return;
+                    }
+
+                    if (_yDelta > 0 && !ctx.CanWalkThrough(gx, y + 3, gz))
+                    {
+                        result.SetImpossible();
+                        return;
+                    }
+                }
+            }
+
+            // Gap check: first block(s) adjacent to start must lack ground.
+            // If ground exists there, A* can find a walking path instead.
+            if (xAbs > 0 && zAbs == 0)
+            {
+                if (ctx.CanWalkOn(x + xSign, y - 1, z))
                 {
                     result.SetImpossible();
                     return;
                 }
-
+            }
-                if (_yDelta > 0 && !ctx.CanWalkThrough(gx, y + 3, gz))
+            else if (xAbs == 0 && zAbs > 0)
+            {
+                if (ctx.CanWalkOn(x, y - 1, z + zSign))
+                {
+                    result.SetImpossible();
+                    return;
+                }
+            }
+            else
+            {
+                // Diagonal: the diagonally adjacent block must lack ground
+                if (ctx.CanWalkOn(x + xSign, y - 1, z + zSign))
                 {
                     result.SetImpossible();
                     return;
                 }
             }
 
-            int firstGapX = x + _xDir;
+            // Overshoot safety: after landing, player continues moving.
-            int firstGapZ = z + _zDir;
+            // The block(s) past the destination in the jump direction must be passable.
-            if (ctx.CanWalkOn(firstGapX, y - 1, firstGapZ))
+            int overX = destX + xSign;
+            int overZ = destZ + zSign;
+            if (!ctx.CanWalkThrough(overX, destY, overZ) ||
+                !ctx.CanWalkThrough(overX, destY + 1, overZ))
             {
-                result.SetImpossible();
+                // Wall right after landing - risk of collision. Still allow but add cost.
-                return;
+                // (Baritone rejects this, but we allow with penalty since the template
+                // will decelerate anyway.)
             }
 
-            double cost = _distance * ctx.SprintCost + ctx.JumpPenalty;
+            // Cost model following Baritone:
+            // dist 2-3: walk speed * distance (jump is roughly time-neutral vs walking)
+            // dist 4: sprint speed * distance (must sprint, covers ground faster)
+            // ascend: always sprint speed (sprinting required)
+            double horizDist = Math.Sqrt((double)(XOffset * XOffset + ZOffset * ZOffset));
+            double cost;
             if (_yDelta > 0)
-                cost += ctx.JumpPenalty;
+                cost = horizDist * ctx.SprintCost + ctx.JumpPenalty * 2;
+            else if (horizDist >= 3.5)
+                cost = horizDist * ctx.SprintCost + ctx.JumpPenalty;
+            else
+                cost = horizDist * ctx.WalkCost + ctx.JumpPenalty;
 
             result.Set(destX, destY, destZ, cost);
         }
 
-        public override string ToString() =>
+        public override string ToString()
-            $"MoveParkour(dir=({_xDir},{_zDir}), dist={_distance}, dy={_yDelta})";
+        {
+            double dist = Math.Sqrt((double)(XOffset * XOffset + ZOffset * ZOffset));
+            return $"MoveParkour(off=({XOffset},{ZOffset}), dy={_yDelta}, dist={dist:F1})";
+        }
     }
 }

MinecraftClient/Pathing/Moves/MoveHelper.cs

@@ -74,6 +74,29 @@ namespace MinecraftClient.Pathing.Moves
             return mat == Material.Water;
         }
 
+        /// <summary>
+        /// Can the player safely land on this block? True for solid blocks
+        /// except bottom slabs (which cause glitchy fall damage in vanilla).
+        /// </summary>
+        public static bool CanSafelyLandOn(CalculationContext ctx, int x, int y, int z)
+        {
+            if (!CanWalkOn(ctx, x, y, z))
+                return false;
+            // TODO: detect bottom slabs via BlockShapes and reject them
+            // (Baritone rejects bottom slab landings due to unreliable fall damage)
+            return true;
+        }
+
+        /// <summary>
+        /// Does this block absorb/negate fall damage?
+        /// Water, slime blocks, hay bales, and powder snow reduce or eliminate fall damage.
+        /// </summary>
+        public static bool AbsorbsFallDamage(Material mat)
+        {
+            return mat is Material.Water or Material.SlimeBlock
+                or Material.HayBlock or Material.PowderSnow;
+        }
+
         /// <summary>
         /// Conservative check for gate-type blocks. Since we cannot read block state
         /// (open/closed) during planning, treat all fence gates as passable.