diff --git a/DataSpec/DNACommon/CRSC.cpp b/DataSpec/DNACommon/CRSC.cpp
index e4dbed107..31deac0b5 100644
--- a/DataSpec/DNACommon/CRSC.cpp
+++ b/DataSpec/DNACommon/CRSC.cpp
@@ -305,13 +305,12 @@ template struct CRSM<UniqueID64>;
 template <class IDType>
 bool ExtractCRSM(PAKEntryReadStream& rs, const hecl::ProjectPath& outPath)
 {
-    FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("w"));
-    if (fp)
+    athena::io::FileWriter writer(outPath.getAbsolutePath());
+    if (writer.isOpen())
     {
         CRSM<IDType> crsm;
         crsm.read(rs);
-        crsm.toYAMLFile(fp);
-        fclose(fp);
+        crsm.toYAMLStream(writer);
         return true;
     }
     return false;
diff --git a/DataSpec/DNACommon/DGRP.cpp b/DataSpec/DNACommon/DGRP.cpp
index 7b558e320..08cf76ac6 100644
--- a/DataSpec/DNACommon/DGRP.cpp
+++ b/DataSpec/DNACommon/DGRP.cpp
@@ -110,13 +110,12 @@ template struct DGRP<UniqueID64>;
 template <class IDType>
 bool ExtractDGRP(PAKEntryReadStream& rs, const hecl::ProjectPath& outPath)
 {
-    FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("w"));
-    if (fp)
+    athena::io::FileWriter writer(outPath.getAbsolutePath());
+    if (writer.isOpen())
     {
         DGRP<IDType> dgrp;
         dgrp.read(rs);
-        dgrp.toYAMLFile(fp);
-        fclose(fp);
+        dgrp.toYAMLStream(writer);
         return true;
     }
     return false;
diff --git a/DataSpec/DNACommon/DNACommon.hpp b/DataSpec/DNACommon/DNACommon.hpp
index 2a5321acf..fc456e993 100644
--- a/DataSpec/DNACommon/DNACommon.hpp
+++ b/DataSpec/DNACommon/DNACommon.hpp
@@ -3,6 +3,8 @@
 
 #include <stdio.h>
 #include <athena/DNAYaml.hpp>
+#include <athena/FileReader.hpp>
+#include <athena/FileWriter.hpp>
 #include <nod/DiscBase.hpp>
 #include "hecl/hecl.hpp"
 #include "hecl/Database.hpp"
diff --git a/DataSpec/DNACommon/DPSC.cpp b/DataSpec/DNACommon/DPSC.cpp
index faa5ebf75..b2b8bfcc3 100644
--- a/DataSpec/DNACommon/DPSC.cpp
+++ b/DataSpec/DNACommon/DPSC.cpp
@@ -410,13 +410,12 @@ template struct DPSM<UniqueID64>;
 template <class IDType>
 bool ExtractDPSM(PAKEntryReadStream& rs, const hecl::ProjectPath& outPath)
 {
-    FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("w"));
-    if (fp)
+    athena::io::FileWriter writer(outPath.getAbsolutePath());
+    if (writer.isOpen())
     {
         DPSM<IDType> dpsm;
         dpsm.read(rs);
-        dpsm.toYAMLFile(fp);
-        fclose(fp);
+        dpsm.toYAMLStream(writer);
         return true;
     }
     return false;
diff --git a/DataSpec/DNACommon/ELSC.cpp b/DataSpec/DNACommon/ELSC.cpp
index 26c69cb20..cb3852fd7 100644
--- a/DataSpec/DNACommon/ELSC.cpp
+++ b/DataSpec/DNACommon/ELSC.cpp
@@ -450,13 +450,12 @@ template struct ELSM<UniqueID64>;
 template <class IDType>
 bool ExtractELSM(PAKEntryReadStream& rs, const hecl::ProjectPath& outPath)
 {
-    FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("w"));
-    if (fp)
+    athena::io::FileWriter writer(outPath.getAbsolutePath());
+    if (writer.isOpen())
     {
         ELSM<IDType> elsm;
         elsm.read(rs);
-        elsm.toYAMLFile(fp);
-        fclose(fp);
+        elsm.toYAMLStream(writer);
         return true;
     }
     return false;
diff --git a/DataSpec/DNACommon/FONT.cpp b/DataSpec/DNACommon/FONT.cpp
index a89d7e246..7d1e35a7c 100644
--- a/DataSpec/DNACommon/FONT.cpp
+++ b/DataSpec/DNACommon/FONT.cpp
@@ -547,13 +547,12 @@ template struct FONT<UniqueID64>;
 template <class IDType>
 bool ExtractFONT(PAKEntryReadStream& rs, const hecl::ProjectPath& outPath)
 {
-    FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("w"));
-    if (fp)
+    athena::io::FileWriter writer(outPath.getAbsolutePath());
+    if (writer.isOpen())
     {
         FONT<IDType> font;
         font.read(rs);
-        font.toYAMLFile(fp);
-        fclose(fp);
+        font.toYAMLStream(writer);
         return true;
     }
     return false;
diff --git a/DataSpec/DNACommon/FSM2.cpp b/DataSpec/DNACommon/FSM2.cpp
index cc45b8e47..b4a7201aa 100644
--- a/DataSpec/DNACommon/FSM2.cpp
+++ b/DataSpec/DNACommon/FSM2.cpp
@@ -984,13 +984,12 @@ template struct FSM2<UniqueID64>;
 template <class IDType>
 bool ExtractFSM2(PAKEntryReadStream& rs, const hecl::ProjectPath& outPath)
 {
-    FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("w"));
-    if (fp)
+    athena::io::FileWriter writer(outPath.getAbsolutePath());
+    if (writer.isOpen())
     {
         FSM2<IDType> fsm2;
         fsm2.read(rs);
-        fsm2.toYAMLFile(fp);
-        fclose(fp);
+        fsm2.toYAMLStream(writer);
         return true;
     }
     return false;
diff --git a/DataSpec/DNACommon/PAK.cpp b/DataSpec/DNACommon/PAK.cpp
index e4c348635..a43757060 100644
--- a/DataSpec/DNACommon/PAK.cpp
+++ b/DataSpec/DNACommon/PAK.cpp
@@ -214,10 +214,8 @@ void PAKRouter<BRIDGETYPE>::build(std::vector<BRIDGETYPE>& bridges, std::functio
         intptr_t curBridgeIdx = reinterpret_cast<intptr_t>(m_curBridgeIdx.get());
         const hecl::ProjectPath& pakPath = m_bridgePaths[curBridgeIdx].first;
         hecl::SystemString catalogPath = hecl::ProjectPath(pakPath, "catalog.yaml").getAbsolutePath();
-        FILE* catalog = hecl::Fopen(catalogPath.c_str(), _S("w"));
-        yaml_emitter_set_output_file(catalogWriter.getEmitter(), catalog);
-        catalogWriter.finish();
-        fclose(catalog);
+        athena::io::FileWriter writer(catalogPath);
+        catalogWriter.finish(&writer);
     }
 }
 
diff --git a/DataSpec/DNACommon/PART.cpp b/DataSpec/DNACommon/PART.cpp
index 945168d64..2c5c9d977 100644
--- a/DataSpec/DNACommon/PART.cpp
+++ b/DataSpec/DNACommon/PART.cpp
@@ -1538,13 +1538,12 @@ template struct GPSM<UniqueID64>;
 template <class IDType>
 bool ExtractGPSM(PAKEntryReadStream& rs, const hecl::ProjectPath& outPath)
 {
-    FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("w"));
-    if (fp)
+    athena::io::FileWriter writer(outPath.getAbsolutePath());
+    if (writer.isOpen())
     {
         GPSM<IDType> gpsm;
         gpsm.read(rs);
-        gpsm.toYAMLFile(fp);
-        fclose(fp);
+        gpsm.toYAMLStream(writer);
         return true;
     }
     return false;
diff --git a/DataSpec/DNACommon/SAVWCommon.hpp b/DataSpec/DNACommon/SAVWCommon.hpp
index 978fe43fc..8325ec372 100644
--- a/DataSpec/DNACommon/SAVWCommon.hpp
+++ b/DataSpec/DNACommon/SAVWCommon.hpp
@@ -45,9 +45,8 @@ static bool ExtractSAVW(PAKEntryReadStream& rs, const hecl::ProjectPath& outPath
 {
     SAVW savw;
     savw.read(rs);
-    FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("wb"));
-    savw.toYAMLFile(fp);
-    fclose(fp);
+    athena::io::FileWriter writer(outPath.getAbsolutePath());
+    savw.toYAMLStream(writer);
     return true;
 }
 
diff --git a/DataSpec/DNACommon/SWHC.cpp b/DataSpec/DNACommon/SWHC.cpp
index 9e550653a..6588c3fa7 100644
--- a/DataSpec/DNACommon/SWHC.cpp
+++ b/DataSpec/DNACommon/SWHC.cpp
@@ -544,13 +544,12 @@ template struct SWSH<UniqueID64>;
 template <class IDType>
 bool ExtractSWSH(PAKEntryReadStream& rs, const hecl::ProjectPath& outPath)
 {
-    FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("w"));
-    if (fp)
+    athena::io::FileWriter writer(outPath.getAbsolutePath());
+    if (writer.isOpen())
     {
         SWSH<IDType> swsh;
         swsh.read(rs);
-        swsh.toYAMLFile(fp);
-        fclose(fp);
+        swsh.toYAMLStream(writer);
         return true;
     }
     return false;
diff --git a/DataSpec/DNACommon/WPSC.cpp b/DataSpec/DNACommon/WPSC.cpp
index c115e4d82..1e87b7adc 100644
--- a/DataSpec/DNACommon/WPSC.cpp
+++ b/DataSpec/DNACommon/WPSC.cpp
@@ -725,13 +725,12 @@ template struct WPSM<UniqueID64>;
 template <class IDType>
 bool ExtractWPSM(PAKEntryReadStream& rs, const hecl::ProjectPath& outPath)
 {
-    FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("w"));
-    if (fp)
+    athena::io::FileWriter writer(outPath.getAbsolutePath());
+    if (writer.isOpen())
     {
         WPSM<IDType> wpsm;
         wpsm.read(rs);
-        wpsm.toYAMLFile(fp);
-        fclose(fp);
+        wpsm.toYAMLStream(writer);
         return true;
     }
     return false;
diff --git a/DataSpec/DNAMP1/AFSM.hpp b/DataSpec/DNAMP1/AFSM.hpp
index 88463278e..bca2c9b62 100644
--- a/DataSpec/DNAMP1/AFSM.hpp
+++ b/DataSpec/DNAMP1/AFSM.hpp
@@ -159,9 +159,8 @@ struct AFSM : public BigYAML
     {
         AFSM afsm;
         afsm.read(rs);
-        FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("wb"));
-        afsm.toYAMLFile(fp);
-        fclose(fp);
+        athena::io::FileWriter writer(outPath.getAbsolutePath());
+        afsm.toYAMLStream(writer);
         return true;
     }
 };
diff --git a/DataSpec/DNAMP1/ANCS.cpp b/DataSpec/DNAMP1/ANCS.cpp
index 9d0e7a025..672a0d137 100644
--- a/DataSpec/DNAMP1/ANCS.cpp
+++ b/DataSpec/DNAMP1/ANCS.cpp
@@ -1031,9 +1031,8 @@ bool ANCS::Extract(const SpecBase& dataSpec,
     {
         if (force || yamlType == hecl::ProjectPath::Type::None)
         {
-            FILE* fp = hecl::Fopen(yamlPath.getAbsolutePath().c_str(), _S("w"));
-            ancs.toYAMLFile(fp);
-            fclose(fp);
+            athena::io::FileWriter writer(yamlPath.getAbsolutePath());
+            ancs.toYAMLStream(writer);
         }
 
         if (force || blendType == hecl::ProjectPath::Type::None)
@@ -1062,9 +1061,8 @@ bool ANCS::Extract(const SpecBase& dataSpec,
                 EVNT evnt;
                 if (pakRouter.lookupAndReadDNA(res.second.evntId, evnt, true))
                 {
-                    FILE* fp = hecl::Fopen(evntYamlPath.getAbsolutePath().c_str(), _S("w"));
-                    evnt.toYAMLFile(fp);
-                    fclose(fp);
+                    athena::io::FileWriter writer(evntYamlPath.getAbsolutePath());
+                    evnt.toYAMLStream(writer);
                 }
             }
         }
@@ -1085,25 +1083,23 @@ bool ANCS::Cook(const hecl::ProjectPath& outPath,
         Log.report(logvisor::Fatal, _S("'%s' not found as file"),
                    yamlPath.getRelativePath().c_str());
 
-    FILE* yamlFp = hecl::Fopen(yamlPath.getAbsolutePath().c_str(), _S("r"));
-    if (!yamlFp)
+    athena::io::FileReader reader(yamlPath.getAbsolutePath());
+    if (!reader.isOpen())
         Log.report(logvisor::Fatal, _S("can't open '%s' for reading"),
                    yamlPath.getRelativePath().c_str());
 
-    if (!BigYAML::ValidateFromYAMLFile<ANCS>(yamlFp))
+    if (!BigYAML::ValidateFromYAMLStream<ANCS>(reader))
     {
         Log.report(logvisor::Fatal, _S("'%s' is not urde::DNAMP1::ANCS type"),
                    yamlPath.getRelativePath().c_str());
     }
 
     athena::io::YAMLDocReader yamlReader;
-    yaml_parser_set_input_file(yamlReader.getParser(), yamlFp);
-    if (!yamlReader.parse())
+    if (!yamlReader.parse(&reader))
     {
         Log.report(logvisor::Fatal, _S("unable to parse '%s'"),
                    yamlPath.getRelativePath().c_str());
     }
-    fclose(yamlFp);
     ANCS ancs;
     ancs.read(yamlReader);
 
@@ -1263,12 +1259,11 @@ bool ANCS::Cook(const hecl::ProjectPath& outPath,
                                                                   _S(".evnt.yaml")).c_str(), true);
         if (evntYamlPath.getPathType() == hecl::ProjectPath::Type::File)
         {
-            FILE* fp = hecl::Fopen(evntYamlPath.getAbsolutePath().c_str(), _S("r"));
-            if (fp)
+            athena::io::FileReader reader(evntYamlPath.getAbsolutePath());
+            if (reader.isOpen())
             {
                 EVNT evnt;
-                evnt.fromYAMLFile(fp);
-                fclose(fp);
+                evnt.fromYAMLStream(reader);
                 anim.m_anim->evnt = evntYamlPath;
 
                 hecl::ProjectPath evntYamlOut = cookedOut.getWithExtension(_S(".evnt"));
diff --git a/DataSpec/DNAMP1/EVNT.hpp b/DataSpec/DNAMP1/EVNT.hpp
index 23edc4037..a680d9a5b 100644
--- a/DataSpec/DNAMP1/EVNT.hpp
+++ b/DataSpec/DNAMP1/EVNT.hpp
@@ -85,9 +85,8 @@ struct EVNT : BigYAML
     {
         EVNT evnt;
         evnt.read(rs);
-        FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("wb"));
-        evnt.toYAMLFile(fp);
-        fclose(fp);
+        athena::io::FileWriter writer(outPath.getAbsolutePath());
+        evnt.toYAMLStream(writer);
         return true;
     }
 };
diff --git a/DataSpec/DNAMP1/MLVL.hpp b/DataSpec/DNAMP1/MLVL.hpp
index de221aafd..16224e016 100644
--- a/DataSpec/DNAMP1/MLVL.hpp
+++ b/DataSpec/DNAMP1/MLVL.hpp
@@ -117,9 +117,8 @@ struct MLVL : BigYAML
     {
         MLVL mlvl;
         mlvl.read(rs);
-        FILE* fp = hecl::Fopen(outPath.getWithExtension(_S(".yaml"), true).getAbsolutePath().c_str(), _S("w"));
-        mlvl.toYAMLFile(fp);
-        fclose(fp);
+        athena::io::FileWriter writer(outPath.getWithExtension(_S(".yaml"), true).getAbsolutePath());
+        mlvl.toYAMLStream(writer);
         hecl::BlenderConnection& conn = btok.getBlenderConnection();
         return DNAMLVL::ReadMLVLToBlender(conn, mlvl, outPath, pakRouter,
                                           entry, force, fileChanged);
diff --git a/DataSpec/DNAMP1/MREA.cpp b/DataSpec/DNAMP1/MREA.cpp
index 70825c98b..1ffd58751 100644
--- a/DataSpec/DNAMP1/MREA.cpp
+++ b/DataSpec/DNAMP1/MREA.cpp
@@ -341,23 +341,15 @@ bool MREA::PCCook(const hecl::ProjectPath& outPath,
         sclyData.version = 1;
         for (const hecl::ProjectPath& layer : layerScriptPaths)
         {
-            FILE* yamlFile = hecl::Fopen(layer.getAbsolutePath().c_str(), _S("r"));
-            if (!yamlFile)
+            athena::io::FileReader freader(layer.getAbsolutePath());
+            if (!freader.isOpen())
                 continue;
-            if (!BigYAML::ValidateFromYAMLFile<DNAMP1::SCLY::ScriptLayer>(yamlFile))
-            {
-                fclose(yamlFile);
+            if (!BigYAML::ValidateFromYAMLStream<DNAMP1::SCLY::ScriptLayer>(freader))
                 continue;
-            }
 
             athena::io::YAMLDocReader reader;
-            yaml_parser_set_input_file(reader.getParser(), yamlFile);
-            if (!reader.parse())
-            {
-                fclose(yamlFile);
+            if (!reader.parse(&freader))
                 continue;
-            }
-            fclose(yamlFile);
 
             sclyData.layers.emplace_back();
             sclyData.layers.back().read(reader);
diff --git a/DataSpec/DNAMP1/SCAN.hpp b/DataSpec/DNAMP1/SCAN.hpp
index ac79bb03d..47c377010 100644
--- a/DataSpec/DNAMP1/SCAN.hpp
+++ b/DataSpec/DNAMP1/SCAN.hpp
@@ -156,18 +156,16 @@ struct SCAN : BigYAML
     {
         SCAN scan;
         scan.read(rs);
-        FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("wb"));
-        scan.toYAMLFile(fp);
-        fclose(fp);
+        athena::io::FileWriter writer(outPath.getAbsolutePath());
+        scan.toYAMLStream(writer);
         return true;
     }
 
     static bool Cook(const hecl::ProjectPath& inPath, const hecl::ProjectPath& outPath)
     {
         SCAN scan;
-        FILE* fp = hecl::Fopen(inPath.getAbsolutePath().c_str(), _S("rb"));
-        scan.fromYAMLFile(fp);
-        fclose(fp);
+        athena::io::FileReader reader(inPath.getAbsolutePath());
+        scan.fromYAMLStream(reader);
         athena::io::FileWriter ws(outPath.getAbsolutePath());
         scan.write(ws);
         return true;
diff --git a/DataSpec/DNAMP1/SCLY.cpp b/DataSpec/DNAMP1/SCLY.cpp
index 8a04550b4..2d22d837f 100644
--- a/DataSpec/DNAMP1/SCLY.cpp
+++ b/DataSpec/DNAMP1/SCLY.cpp
@@ -54,9 +54,8 @@ void SCLY::exportToLayerDirectories(const PAK::Entry& entry, PAKRouter<PAKBridge
         hecl::ProjectPath yamlFile(layerPath, _S("objects.yaml"));
         if (force || yamlFile.getPathType() == hecl::ProjectPath::Type::None)
         {
-            FILE* yaml = hecl::Fopen(yamlFile.getAbsolutePath().c_str(), _S("wb"));
-            layers[i].toYAMLFile(yaml);
-            fclose(yaml);
+            athena::io::FileWriter writer(yamlFile.getAbsolutePath());
+            layers[i].toYAMLStream(writer);
         }
     }
 }
diff --git a/DataSpec/DNAMP1/STRG.hpp b/DataSpec/DNAMP1/STRG.hpp
index 50f2bc5e2..092a64b06 100644
--- a/DataSpec/DNAMP1/STRG.hpp
+++ b/DataSpec/DNAMP1/STRG.hpp
@@ -62,18 +62,16 @@ struct STRG : ISTRG
     {
         STRG strg;
         strg.read(rs);
-        FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("wb"));
-        strg.toYAMLFile(fp);
-        fclose(fp);
+        athena::io::FileWriter writer(outPath.getAbsolutePath());
+        strg.toYAMLStream(writer);
         return true;
     }
 
     static bool Cook(const hecl::ProjectPath& inPath, const hecl::ProjectPath& outPath)
     {
         STRG strg;
-        FILE* fp = hecl::Fopen(inPath.getAbsolutePath().c_str(), _S("rb"));
-        strg.fromYAMLFile(fp);
-        fclose(fp);
+        athena::io::FileReader reader(inPath.getAbsolutePath());
+        strg.fromYAMLStream(reader);
         athena::io::FileWriter ws(outPath.getAbsolutePath());
         strg.write(ws);
         return true;
diff --git a/DataSpec/DNAMP2/ANCS.hpp b/DataSpec/DNAMP2/ANCS.hpp
index 5f9637e9f..b93912176 100644
--- a/DataSpec/DNAMP2/ANCS.hpp
+++ b/DataSpec/DNAMP2/ANCS.hpp
@@ -240,9 +240,8 @@ struct ANCS : BigYAML
 
             if (force || yamlType == hecl::ProjectPath::Type::None)
             {
-                FILE* fp = hecl::Fopen(yamlPath.getAbsolutePath().c_str(), _S("wb"));
-                ancs.toYAMLFile(fp);
-                fclose(fp);
+                athena::io::FileWriter writer(yamlPath.getAbsolutePath());
+                ancs.toYAMLStream(writer);
             }
 
             if (force || blendType == hecl::ProjectPath::Type::None)
diff --git a/DataSpec/DNAMP2/MLVL.hpp b/DataSpec/DNAMP2/MLVL.hpp
index 69a0bd219..f055bcad0 100644
--- a/DataSpec/DNAMP2/MLVL.hpp
+++ b/DataSpec/DNAMP2/MLVL.hpp
@@ -105,9 +105,8 @@ struct MLVL : BigYAML
     {
         MLVL mlvl;
         mlvl.read(rs);
-        FILE* fp = hecl::Fopen(outPath.getWithExtension(_S(".yaml"), true).getAbsolutePath().c_str(), _S("wb"));
-        mlvl.toYAMLFile(fp);
-        fclose(fp);
+        athena::io::FileWriter writer(outPath.getWithExtension(_S(".yaml"), true).getAbsolutePath());
+        mlvl.toYAMLStream(writer);
         hecl::BlenderConnection& conn = btok.getBlenderConnection();
         return DNAMLVL::ReadMLVLToBlender(conn, mlvl, outPath, pakRouter,
                                           entry, force, fileChanged);
diff --git a/DataSpec/DNAMP2/STRG.hpp b/DataSpec/DNAMP2/STRG.hpp
index 8ae4e8318..de70664ab 100644
--- a/DataSpec/DNAMP2/STRG.hpp
+++ b/DataSpec/DNAMP2/STRG.hpp
@@ -68,18 +68,16 @@ struct STRG : ISTRG
     {
         STRG strg;
         strg.read(rs);
-        FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("wb"));
-        strg.toYAMLFile(fp);
-        fclose(fp);
+        athena::io::FileWriter writer(outPath.getAbsolutePath());
+        strg.toYAMLStream(writer);
         return true;
     }
 
     static bool Cook(const hecl::ProjectPath& inPath, const hecl::ProjectPath& outPath)
     {
         STRG strg;
-        FILE* fp = hecl::Fopen(inPath.getAbsolutePath().c_str(), _S("rb"));
-        strg.fromYAMLFile(fp);
-        fclose(fp);
+        athena::io::FileReader reader(inPath.getAbsolutePath());
+        strg.fromYAMLStream(reader);
         athena::io::FileWriter ws(outPath.getAbsolutePath());
         strg.write(ws);
         return true;
diff --git a/DataSpec/DNAMP3/CHAR.hpp b/DataSpec/DNAMP3/CHAR.hpp
index 060255cc5..53bf2138b 100644
--- a/DataSpec/DNAMP3/CHAR.hpp
+++ b/DataSpec/DNAMP3/CHAR.hpp
@@ -329,9 +329,8 @@ struct CHAR : BigYAML
 
             if (force || yamlType == hecl::ProjectPath::Type::None)
             {
-                FILE* fp = hecl::Fopen(yamlPath.getAbsolutePath().c_str(), _S("wb"));
-                aChar.toYAMLFile(fp);
-                fclose(fp);
+                athena::io::FileWriter writer(yamlPath.getAbsolutePath());
+                aChar.toYAMLStream(writer);
             }
 
             if (force || blendType == hecl::ProjectPath::Type::None)
diff --git a/DataSpec/DNAMP3/MLVL.hpp b/DataSpec/DNAMP3/MLVL.hpp
index d7cb0923b..4b5a9704d 100644
--- a/DataSpec/DNAMP3/MLVL.hpp
+++ b/DataSpec/DNAMP3/MLVL.hpp
@@ -94,9 +94,8 @@ struct MLVL : BigYAML
     {
         MLVL mlvl;
         mlvl.read(rs);
-        FILE* fp = hecl::Fopen(outPath.getWithExtension(_S(".yaml"), true).getAbsolutePath().c_str(), _S("wb"));
-        mlvl.toYAMLFile(fp);
-        fclose(fp);
+        athena::io::FileWriter writer(outPath.getWithExtension(_S(".yaml"), true).getAbsolutePath());
+        mlvl.toYAMLStream(writer);
         hecl::BlenderConnection& conn = btok.getBlenderConnection();
         return DNAMLVL::ReadMLVLToBlender(conn, mlvl, outPath, pakRouter,
                                           entry, force, fileChanged);
diff --git a/DataSpec/DNAMP3/STRG.hpp b/DataSpec/DNAMP3/STRG.hpp
index ec84f7d8b..4cdc0ebc4 100644
--- a/DataSpec/DNAMP3/STRG.hpp
+++ b/DataSpec/DNAMP3/STRG.hpp
@@ -67,18 +67,16 @@ struct STRG : ISTRG
     static bool Extract(PAKEntryReadStream& rs, const hecl::ProjectPath& outPath)
     {
         std::unique_ptr<ISTRG> strg = LoadSTRG(rs);
-        FILE* fp = hecl::Fopen(outPath.getAbsolutePath().c_str(), _S("wb"));
-        strg->toYAMLFile(fp);
-        fclose(fp);
+        athena::io::FileWriter writer(outPath.getAbsolutePath());
+        strg->toYAMLStream(writer);
         return true;
     }
 
     static bool Cook(const hecl::ProjectPath& inPath, const hecl::ProjectPath& outPath)
     {
         STRG strg;
-        FILE* fp = hecl::Fopen(inPath.getAbsolutePath().c_str(), _S("rb"));
-        strg.fromYAMLFile(fp);
-        fclose(fp);
+        athena::io::FileReader reader(inPath.getAbsolutePath());
+        strg.fromYAMLStream(reader);
         athena::io::FileWriter ws(outPath.getAbsolutePath());
         strg.write(ws);
         return true;
diff --git a/DataSpec/SpecBase.cpp b/DataSpec/SpecBase.cpp
index 745d64fa4..9ada3e0a7 100644
--- a/DataSpec/SpecBase.cpp
+++ b/DataSpec/SpecBase.cpp
@@ -141,9 +141,8 @@ bool SpecBase::canCook(const hecl::ProjectPath& path, hecl::BlenderToken& btok)
     }
     else if (hecl::IsPathYAML(path))
     {
-        FILE* fp = hecl::Fopen(path.getAbsolutePath().c_str(), _S("r"));
-        bool retval = validateYAMLDNAType(fp);
-        fclose(fp);
+        athena::io::FileReader reader(path.getAbsolutePath());
+        bool retval = validateYAMLDNAType(reader);
         return retval;
     }
     return false;
@@ -217,9 +216,8 @@ void SpecBase::doCook(const hecl::ProjectPath& path, const hecl::ProjectPath& co
     }
     else if (hecl::IsPathYAML(path))
     {
-        FILE* fp = hecl::Fopen(path.getAbsolutePath().c_str(), _S("r"));
-        cookYAML(cookedPath, path, fp, progress);
-        fclose(fp);
+        athena::io::FileReader reader(path.getAbsolutePath());
+        cookYAML(cookedPath, path, reader, progress);
     }
 }
 
diff --git a/DataSpec/SpecBase.hpp b/DataSpec/SpecBase.hpp
index d81132187..b106c753a 100644
--- a/DataSpec/SpecBase.hpp
+++ b/DataSpec/SpecBase.hpp
@@ -49,7 +49,7 @@ struct SpecBase : hecl::Database::IDataSpec
     virtual bool checkPathPrefix(const hecl::ProjectPath& path)=0;
 
     /* Pre-cook handlers */
-    virtual bool validateYAMLDNAType(FILE* fp) const=0;
+    virtual bool validateYAMLDNAType(athena::io::IStreamReader& fp) const=0;
 
     /* Cook handlers */
     using BlendStream = hecl::BlenderConnection::DataStream;
@@ -68,7 +68,7 @@ struct SpecBase : hecl::Database::IDataSpec
                           BlendStream& ds, bool fast, hecl::BlenderToken& btok,
                           FCookProgress progress)=0;
     virtual void cookYAML(const hecl::ProjectPath& out, const hecl::ProjectPath& in,
-                          FILE* fin, FCookProgress progress)=0;
+                          athena::io::IStreamReader& fin, FCookProgress progress)=0;
 
     const hecl::ProjectPath& getMasterShaderPath() const {return m_masterShader;}
 
diff --git a/DataSpec/SpecMP1.cpp b/DataSpec/SpecMP1.cpp
index b75c565b4..d2183a17e 100644
--- a/DataSpec/SpecMP1.cpp
+++ b/DataSpec/SpecMP1.cpp
@@ -320,10 +320,10 @@ struct SpecMP1 : SpecBase
         return path.getRelativePath().compare(0, 4, _S("MP1/")) == 0;
     }
 
-    bool validateYAMLDNAType(FILE* fp) const
+    bool validateYAMLDNAType(athena::io::IStreamReader& fp) const
     {
         athena::io::YAMLDocReader reader;
-        yaml_parser_set_input_file(reader.getParser(), fp);
+        yaml_parser_set_input(reader.getParser(), (yaml_read_handler_t*)athena::io::YAMLAthenaReader, &fp);
         return reader.ClassTypeOperation([](const char* classType)
         {
             if (!strcmp(classType, DNAMP1::MLVL::DNAType()))
@@ -422,11 +422,10 @@ struct SpecMP1 : SpecBase
     }
 
     void cookYAML(const hecl::ProjectPath& out, const hecl::ProjectPath& in,
-                  FILE* fin, FCookProgress progress)
+                  athena::io::IStreamReader& fin, FCookProgress progress)
     {
         athena::io::YAMLDocReader reader;
-        yaml_parser_set_input_file(reader.getParser(), fin);
-        if (reader.parse())
+        if (reader.parse(&fin))
         {
             std::string classStr = reader.readString("DNAType");
             if (classStr.empty())
diff --git a/DataSpec/SpecMP2.cpp b/DataSpec/SpecMP2.cpp
index 43155f408..62dc704e3 100644
--- a/DataSpec/SpecMP2.cpp
+++ b/DataSpec/SpecMP2.cpp
@@ -285,11 +285,11 @@ struct SpecMP2 : SpecBase
         return path.getRelativePath().compare(0, 4, _S("MP2/")) == 0;
     }
 
-    bool validateYAMLDNAType(FILE* fp) const
+    bool validateYAMLDNAType(athena::io::IStreamReader& fp) const
     {
-        if (BigYAML::ValidateFromYAMLFile<DNAMP2::MLVL>(fp))
+        if (BigYAML::ValidateFromYAMLStream<DNAMP2::MLVL>(fp))
             return true;
-        if (BigYAML::ValidateFromYAMLFile<DNAMP2::STRG>(fp))
+        if (BigYAML::ValidateFromYAMLStream<DNAMP2::STRG>(fp))
             return true;
         return false;
     }
@@ -313,7 +313,7 @@ struct SpecMP2 : SpecBase
     }
 
     void cookYAML(const hecl::ProjectPath& out, const hecl::ProjectPath& in,
-                  FILE* fin, FCookProgress progress)
+                  athena::io::IStreamReader& fin, FCookProgress progress)
     {
     }
 };
diff --git a/DataSpec/SpecMP3.cpp b/DataSpec/SpecMP3.cpp
index 270d8021d..0dd49439a 100644
--- a/DataSpec/SpecMP3.cpp
+++ b/DataSpec/SpecMP3.cpp
@@ -478,13 +478,13 @@ struct SpecMP3 : SpecBase
         return path.getRelativePath().compare(0, 4, _S("MP3/")) == 0;
     }
 
-    bool validateYAMLDNAType(FILE* fp) const
+    bool validateYAMLDNAType(athena::io::IStreamReader& fp) const
     {
-        if (BigYAML::ValidateFromYAMLFile<DNAMP3::MLVL>(fp))
+        if (BigYAML::ValidateFromYAMLStream<DNAMP3::MLVL>(fp))
             return true;
-        if (BigYAML::ValidateFromYAMLFile<DNAMP3::STRG>(fp))
+        if (BigYAML::ValidateFromYAMLStream<DNAMP3::STRG>(fp))
             return true;
-        if (BigYAML::ValidateFromYAMLFile<DNAMP2::STRG>(fp))
+        if (BigYAML::ValidateFromYAMLStream<DNAMP2::STRG>(fp))
             return true;
         return false;
     }
@@ -508,7 +508,7 @@ struct SpecMP3 : SpecBase
     }
 
     void cookYAML(const hecl::ProjectPath& out, const hecl::ProjectPath& in,
-                  FILE* fin, FCookProgress progress)
+                  athena::io::IStreamReader& fin, FCookProgress progress)
     {
     }
 };
diff --git a/Editor/ProjectManager.cpp b/Editor/ProjectManager.cpp
index 7b4bffa44..6b1ee57a9 100644
--- a/Editor/ProjectManager.cpp
+++ b/Editor/ProjectManager.cpp
@@ -96,34 +96,30 @@ bool ProjectManager::openProject(const hecl::SystemString& path)
     }
 
     hecl::ProjectPath urdeSpacesPath(*m_proj, _S(".hecl/urde_spaces.yaml"));
-    FILE* fp = hecl::Fopen(urdeSpacesPath.getAbsolutePath().c_str(), _S("r"));
+    athena::io::FileReader reader(urdeSpacesPath.getAbsolutePath());
 
     bool needsSave = false;
     athena::io::YAMLDocReader r;
-    if (!fp)
+    if (!reader.isOpen())
     {
         needsSave = true;
         goto makeProj;
     }
 
-    yaml_parser_set_input_file(r.getParser(), fp);
+    yaml_parser_set_input(r.getParser(), (yaml_read_handler_t*)athena::io::YAMLAthenaReader, &reader);
     if (!r.ValidateClassType("UrdeSpacesState"))
     {
         needsSave = true;
-        fclose(fp);
         goto makeProj;
     }
 
     r.reset();
-    fseek(fp, 0, SEEK_SET);
-    yaml_parser_set_input_file(r.getParser(), fp);
-    if (!r.parse())
+    reader.seek(0, athena::Begin);
+    if (!r.parse(&reader))
     {
         needsSave = true;
-        fclose(fp);
         goto makeProj;
     }
-    fclose(fp);
 
 makeProj:
     m_vm.ProjectChanged(*m_proj);
@@ -163,19 +159,14 @@ bool ProjectManager::saveProject()
         return false;
 
     hecl::ProjectPath oldSpacesPath(*m_proj, _S(".hecl/~urde_spaces.yaml"));
-    FILE* fp = hecl::Fopen(oldSpacesPath.getAbsolutePath().c_str(), _S("w"));
-    if (!fp)
+    athena::io::FileWriter writer(oldSpacesPath.getAbsolutePath());
+    if (!writer.isOpen())
         return false;
 
     athena::io::YAMLDocWriter w("UrdeSpacesState");
-    yaml_emitter_set_output_file(w.getEmitter(), fp);
     m_vm.SaveEditorView(w);
-    if (!w.finish())
-    {
-        fclose(fp);
+    if (!w.finish(&writer))
         return false;
-    }
-    fclose(fp);
 
     hecl::ProjectPath newSpacesPath(*m_proj, _S(".hecl/urde_spaces.yaml"));
 
diff --git a/Editor/ProjectResourceFactoryBase.cpp b/Editor/ProjectResourceFactoryBase.cpp
index 8d1c51828..cf30525a9 100644
--- a/Editor/ProjectResourceFactoryBase.cpp
+++ b/Editor/ProjectResourceFactoryBase.cpp
@@ -16,14 +16,12 @@ void ProjectResourceFactoryBase::Clear()
 void ProjectResourceFactoryBase::ReadCatalog(const hecl::ProjectPath& catalogPath,
                                              athena::io::YAMLDocWriter& nameWriter)
 {
-    FILE* fp = hecl::Fopen(catalogPath.getAbsolutePath().c_str(), _S("r"));
-    if (!fp)
+    athena::io::FileReader freader(catalogPath.getAbsolutePath());
+    if (!freader.isOpen())
         return;
 
     athena::io::YAMLDocReader reader;
-    yaml_parser_set_input_file(reader.getParser(), fp);
-    bool res = reader.parse();
-    fclose(fp);
+    bool res = reader.parse(&freader);
     if (!res)
         return;
 
@@ -208,13 +206,12 @@ void ProjectResourceFactoryBase::BackgroundIndexProc()
     /* Read in tag cache */
     if (tagCachePath.getPathType() == hecl::ProjectPath::Type::File)
     {
-        FILE* cacheFile = hecl::Fopen(tagCachePath.getAbsolutePath().c_str(), _S("r"));
-        if (cacheFile)
+        athena::io::FileReader reader(tagCachePath.getAbsolutePath());
+        if (reader.isOpen())
         {
             Log.report(logvisor::Info, _S("Cache index of '%s' loading"), m_origSpec->m_name);
             athena::io::YAMLDocReader cacheReader;
-            yaml_parser_set_input_file(cacheReader.getParser(), cacheFile);
-            if (cacheReader.parse())
+            if (cacheReader.parse(&reader))
             {
                 std::unique_lock<std::mutex> lk(m_backgroundIndexMutex);
                 m_tagToPath.reserve(cacheReader.getRootNode()->m_mapChildren.size());
@@ -231,7 +228,6 @@ void ProjectResourceFactoryBase::BackgroundIndexProc()
                 }
                 fprintf(stderr, "\n");
             }
-            fclose(cacheFile);
             Log.report(logvisor::Info, _S("Cache index of '%s' loaded; %d tags"),
                        m_origSpec->m_name, m_tagToPath.size());
 
@@ -239,10 +235,9 @@ void ProjectResourceFactoryBase::BackgroundIndexProc()
             {
                 /* Read in name cache */
                 Log.report(logvisor::Info, _S("Name index of '%s' loading"), m_origSpec->m_name);
-                FILE* nameFile = hecl::Fopen(nameCachePath.getAbsolutePath().c_str(), _S("r"));
+                athena::io::FileReader nreader(nameCachePath.getAbsolutePath());
                 athena::io::YAMLDocReader nameReader;
-                yaml_parser_set_input_file(nameReader.getParser(), nameFile);
-                if (nameReader.parse())
+                if (nameReader.parse(&nreader))
                 {
                     std::unique_lock<std::mutex> lk(m_backgroundIndexMutex);
                     m_catalogNameToTag.reserve(nameReader.getRootNode()->m_mapChildren.size());
@@ -254,7 +249,6 @@ void ProjectResourceFactoryBase::BackgroundIndexProc()
                             m_catalogNameToTag[child.first] = search->first;
                     }
                 }
-                fclose(nameFile);
                 Log.report(logvisor::Info, _S("Name index of '%s' loaded; %d names"),
                            m_origSpec->m_name, m_catalogNameToTag.size());
             }
@@ -264,10 +258,8 @@ void ProjectResourceFactoryBase::BackgroundIndexProc()
                 Log.report(logvisor::Info, _S("Name index of '%s' started"), m_origSpec->m_name);
                 athena::io::YAMLDocWriter nameWriter(nullptr);
                 BackgroundIndexRecursiveCatalogs(specRoot, nameWriter, 0);
-                FILE* nameFile = hecl::Fopen(nameCachePath.getAbsolutePath().c_str(), _S("w"));
-                yaml_emitter_set_output_file(nameWriter.getEmitter(), nameFile);
-                nameWriter.finish();
-                fclose(nameFile);
+                athena::io::FileWriter nwriter(nameCachePath.getAbsolutePath());
+                nameWriter.finish(&nwriter);
                 Log.report(logvisor::Info, _S("Name index of '%s' complete; %d names"),
                            m_origSpec->m_name, m_catalogNameToTag.size());
             }
@@ -282,15 +274,11 @@ void ProjectResourceFactoryBase::BackgroundIndexProc()
     BackgroundIndexRecursiveProc(specRoot, cacheWriter, nameWriter, 0);
 
     tagCachePath.makeDirChain(false);
-    FILE* cacheFile = hecl::Fopen(tagCachePath.getAbsolutePath().c_str(), _S("w"));
-    yaml_emitter_set_output_file(cacheWriter.getEmitter(), cacheFile);
-    cacheWriter.finish();
-    fclose(cacheFile);
+    athena::io::FileWriter twriter(tagCachePath.getAbsolutePath());
+    cacheWriter.finish(&twriter);
 
-    FILE* nameFile = hecl::Fopen(nameCachePath.getAbsolutePath().c_str(), _S("w"));
-    yaml_emitter_set_output_file(nameWriter.getEmitter(), nameFile);
-    nameWriter.finish();
-    fclose(nameFile);
+    athena::io::FileWriter nwriter(nameCachePath.getAbsolutePath());
+    nameWriter.finish(&nwriter);
 
     m_backgroundBlender.shutdown();
     Log.report(logvisor::Info, _S("Background index of '%s' complete; %d tags, %d names"),
diff --git a/Editor/ViewManager.cpp b/Editor/ViewManager.cpp
index 3e2912502..eabb8af4d 100644
--- a/Editor/ViewManager.cpp
+++ b/Editor/ViewManager.cpp
@@ -32,7 +32,7 @@ void ViewManager::BuildTestPART(urde::IObjectStore& objStore)
     SObjectTag samusCharSet = m_projManager.TagFromPath(_S("MP1/Shared/ANCS_77289A4A.blend"));
     SObjectTag platModel = m_projManager.TagFromPath(_S("MP1/Shared/CMDL_6FA561D0.blend"));
     SObjectTag bgModel = m_projManager.TagFromPath(_S("MP1/Shared/CMDL_BC34D54C.blend"));
-    CAnimRes samusAnimRes(samusCharSet.id, -1, zeus::CVector3f::skOne, -1, true);
+    CAnimRes samusAnimRes(samusCharSet.id, 2, zeus::CVector3f::skOne, 0, true);
     g_GameState->GetWorldTransitionManager()->EnableTransition(samusAnimRes,
                                                                platModel.id, zeus::CVector3f::skOne,
                                                                bgModel.id, zeus::CVector3f::skOne, false);
diff --git a/hecl b/hecl
index 3bc81a3fe..9b9dae615 160000
--- a/hecl
+++ b/hecl
@@ -1 +1 @@
-Subproject commit 3bc81a3fe2711d9d7817e6f24afe7e29ca5e99d3
+Subproject commit 9b9dae61566460086a51ccf371fc1bdf682ee5cb
diff --git a/specter b/specter
index 5e695dab6..4c675e2e0 160000
--- a/specter
+++ b/specter
@@ -1 +1 @@
-Subproject commit 5e695dab622d5095120224297b3c2fea4b3b85ca
+Subproject commit 4c675e2e0512c911b76da84b0073396392c7f3a3