New source found from dndbeyond.com

ddb_main/packages/rules-engine/es/engine/Snippet/constants.js

@@ -14,6 +14,7 @@ export var SnippetMathOperatorEnum;
 })(SnippetMathOperatorEnum || (SnippetMathOperatorEnum = {}));
 export var SnippetTagValueTypeEnum;
 (function (SnippetTagValueTypeEnum) {
+    SnippetTagValueTypeEnum["SPEED"] = "speed";
     SnippetTagValueTypeEnum["SAVE_DC"] = "savedc";
     SnippetTagValueTypeEnum["SPELL_ATTACK"] = "spellattack";
     SnippetTagValueTypeEnum["SCALE_VALUE"] = "scalevalue";
@@ -51,6 +52,14 @@ export var SnippetAbilityKeyEnum;
     SnippetAbilityKeyEnum["WISDOM"] = "wis";
     SnippetAbilityKeyEnum["CHARISMA"] = "cha";
 })(SnippetAbilityKeyEnum || (SnippetAbilityKeyEnum = {}));
+export var SnippetSpeedMovementKeyEnum;
+(function (SnippetSpeedMovementKeyEnum) {
+    SnippetSpeedMovementKeyEnum["WALK"] = "walk";
+    SnippetSpeedMovementKeyEnum["FLY"] = "fly";
+    SnippetSpeedMovementKeyEnum["BURROW"] = "burrow";
+    SnippetSpeedMovementKeyEnum["SWIM"] = "swim";
+    SnippetSpeedMovementKeyEnum["CLIMB"] = "climb";
+})(SnippetSpeedMovementKeyEnum || (SnippetSpeedMovementKeyEnum = {}));
 export var SnippetContentChunkTypeEnum;
 (function (SnippetContentChunkTypeEnum) {
     SnippetContentChunkTypeEnum["TEXT"] = "TEXT";

ddb_main/packages/rules-engine/es/engine/Snippet/generators.js

@@ -5,15 +5,17 @@
  * @param abilityLookup
  * @param xpInfo
  * @param hitPointInfo
+ * @param speedInfo
  * @param ruleData
  */
-export function generateSnippetData(proficiencyBonus, abilityKeyLookup, abilityLookup, xpInfo, hitPointInfo, ruleData) {
+export function generateSnippetData(proficiencyBonus, abilityKeyLookup, abilityLookup, xpInfo, hitPointInfo, speedInfo, ruleData) {
     return {
         proficiencyBonus,
         abilityKeyLookup,
         abilityLookup,
         xpInfo,
         hitPointInfo,
+        speedInfo,
         ruleData,
     };
 }

ddb_main/packages/rules-engine/es/engine/Snippet/utils.js

@@ -2,6 +2,7 @@ import { isFinite, toNumber } from 'lodash';
 import { TypeScriptUtils } from '../../utils';
 import { AbilityAccessors } from '../Ability';
 import { CharacterDerivers } from '../Character';
+import { SpeedMovementKeyEnum } from '../Core';
 import { DiceRenderers } from '../Dice';
 import { FormatUtils } from '../Format';
 import { LimitedUseDerivers } from '../LimitedUse';
@@ -90,6 +91,7 @@ export function isSnippetPostProcessTypeEnum(key) {
  */
 export function isSnippetTagValueTypeEnum(key) {
     switch (key) {
+        case SnippetTagValueTypeEnum.SPEED:
         case SnippetTagValueTypeEnum.SCALE_VALUE:
         case SnippetTagValueTypeEnum.LIMITED_USE:
         case SnippetTagValueTypeEnum.CLASS_LEVEL:
@@ -107,6 +109,23 @@ export function isSnippetTagValueTypeEnum(key) {
     }
     return false;
 }
+/**
+ *
+ * @param type
+ */
+export function isSnippetSpeedMovementKeyEnum(key) {
+    switch (key) {
+        case SpeedMovementKeyEnum.WALK:
+        case SpeedMovementKeyEnum.FLY:
+        case SpeedMovementKeyEnum.BURROW:
+        case SpeedMovementKeyEnum.SWIM:
+        case SpeedMovementKeyEnum.CLIMB:
+            return true;
+        default:
+        // not implemented
+    }
+    return false;
+}
 /**
  *
  * @param type
@@ -207,6 +226,7 @@ export function throwInvalidSnippetCharacters(str) {
     keywordMatches === null || keywordMatches === void 0 ? void 0 : keywordMatches.forEach((keyword) => {
         if (isSnippetTagValueTypeEnum(keyword) ||
             isSnippetAbilityKeyEnum(keyword) ||
+            isSnippetSpeedMovementKeyEnum(keyword) ||
             isSnippetValueModifierTypeEnum(keyword) ||
             isSnippetPostProcessTypeEnum(keyword)) {
             return;
@@ -323,9 +343,21 @@ export function deriveStringTagValue(tagValue, contextData) {
  * @param proficiencyBonus
  */
 export function deriveNumericTagValue(tagValue, contextData, snippetData, proficiencyBonus) {
+    var _a;
     const { type, params } = tagValue;
     let value = 0;
     switch (type) {
+        case SnippetTagValueTypeEnum.SPEED: {
+            const movementType = (_a = params[0]) !== null && _a !== void 0 ? _a : SpeedMovementKeyEnum.WALK;
+            if (!isSnippetSpeedMovementKeyEnum(movementType)) {
+                throw new Error(`Invalid speed type: ${movementType}`);
+            }
+            const speed = snippetData.speedInfo[movementType];
+            if (speed === null) {
+                throw new Error(`No speed data available for ${movementType}`);
+            }
+            return speed;
+        }
         case SnippetTagValueTypeEnum.SAVE_DC:
             if (params.length < 1) {
                 throw new Error('Save DC missing ability key');