diff --git a/anon/src/index.ts b/anon/src/index.ts
index 1bb54b1..5b8c2d3 100644
--- a/anon/src/index.ts
+++ b/anon/src/index.ts
@@ -177,7 +177,8 @@ function anonymize(
     const buf = `|${a.join('|')}`;
     const kws: string[] = [];
     for (const k in kwArgs) {
-      let v = kwArgs[k as keyof typeof kwArgs] as string;
+      let v = kwArgs[k as keyof typeof kwArgs] as any;
+
       if (k === 'of') {
         v = anonymizePokemon(v as PokemonIdent, pokemonMap);
       } else if (k === 'spread') {
@@ -185,7 +186,7 @@ function anonymize(
         v = v.split(',').map((s: string | PokemonIdent) =>
           IDENT.test(s) ? anonymizePokemon(s as PokemonIdent, pokemonMap) : s).join(',');
       }
-      kws.push(`[${k}] ${v}`);
+      kws.push(v === true ? `[${k}]` : `[${k}] ${v}`);
     }
     return kws.length ? `${buf}|${kws.join('|')}` : buf;
   };
diff --git a/anon/src/testdata/anon.json b/anon/src/testdata/anon.json
index 8ed15e8..3348dc9 100644
--- a/anon/src/testdata/anon.json
+++ b/anon/src/testdata/anon.json
@@ -425,7 +425,7 @@
     "|-unboost|p2a: Rayquaza|spd|1",
     "|faint|p1a: Darmanitan",
     "|",
-    "|-weather|DeltaStream|[upkeep] true",
+    "|-weather|DeltaStream|[upkeep]",
     "|upkeep",
     "|",
     "|switch|p1a: Zygarde|Zygarde|100/100",
@@ -443,7 +443,7 @@
     "|",
     "|-activate|p1a: Zygarde|ability: Power Construct|",
     "|detailschange|p1a: Zygarde|Zygarde-Complete",
-    "|-heal|p1a: Zygarde|62/100|[silent] true",
+    "|-heal|p1a: Zygarde|62/100|[silent]",
     "|upkeep",
     "|turn|3",
     "|",
@@ -483,7 +483,7 @@
     "|-damage|p1a: Dugtrio|21/100",
     "|-hitcount|p1a: Dugtrio|2",
     "|-damage|p2a: Greninja|71/100|[from] item: Life Orb",
-    "|move|p1a: Dugtrio|Sucker Punch||[still] true",
+    "|move|p1a: Dugtrio|Sucker Punch||[still]",
     "|-fail|p1a: Dugtrio",
     "|",
     "|upkeep",
@@ -566,7 +566,7 @@
     "|",
     "|move|p1a: Shaymin|Hidden Power|p2a: Ditto",
     "|-damage|p2a: Ditto|79/100",
-    "|move|p2a: Ditto|Play Rough|p1a: Shaymin|[miss] true",
+    "|move|p2a: Ditto|Play Rough|p1a: Shaymin|[miss]",
     "|-miss|p2a: Ditto|p1a: Shaymin",
     "|",
     "|upkeep",
diff --git a/anon/src/testdata/salt.json b/anon/src/testdata/salt.json
index b895e22..e3869e7 100644
--- a/anon/src/testdata/salt.json
+++ b/anon/src/testdata/salt.json
@@ -425,7 +425,7 @@
     "|-unboost|p2a: 64bd07b346|spd|1",
     "|faint|p1a: 544459d148",
     "|",
-    "|-weather|DeltaStream|[upkeep] true",
+    "|-weather|DeltaStream|[upkeep]",
     "|upkeep",
     "|",
     "|switch|p1a: ad9358a773|Zygarde|100/100",
@@ -443,7 +443,7 @@
     "|",
     "|-activate|p1a: ad9358a773|ability: Power Construct|",
     "|detailschange|p1a: ad9358a773|Zygarde-Complete",
-    "|-heal|p1a: ad9358a773|62/100|[silent] true",
+    "|-heal|p1a: ad9358a773|62/100|[silent]",
     "|upkeep",
     "|turn|3",
     "|",
@@ -483,7 +483,7 @@
     "|-damage|p1a: 8db0521bcb|21/100",
     "|-hitcount|p1a: 8db0521bcb|2",
     "|-damage|p2a: d677adb2c9|71/100|[from] item: Life Orb",
-    "|move|p1a: 8db0521bcb|Sucker Punch||[still] true",
+    "|move|p1a: 8db0521bcb|Sucker Punch||[still]",
     "|-fail|p1a: 8db0521bcb",
     "|",
     "|upkeep",
@@ -566,7 +566,7 @@
     "|",
     "|move|p1a: 540aaed869|Hidden Power|p2a: ce04869101",
     "|-damage|p2a: ce04869101|79/100",
-    "|move|p2a: ce04869101|Play Rough|p1a: 540aaed869|[miss] true",
+    "|move|p2a: ce04869101|Play Rough|p1a: 540aaed869|[miss]",
     "|-miss|p2a: ce04869101|p1a: 540aaed869",
     "|",
     "|upkeep",