diff --git a/src/emu/metadata.c b/src/emu/metadata.c
index b28253b..37706f8 100644
--- a/src/emu/metadata.c
+++ b/src/emu/metadata.c
@@ -9,6 +9,7 @@
 #include "ovni.h"
 #include "parson.h"
 #include "proc.h"
+#include "thread.h"
 
 static JSON_Object *
 load_json(const char *path)
@@ -45,19 +46,6 @@ check_version(JSON_Object *meta)
 		return -1;
 	}
 
-	JSON_Value *mversion_val = json_object_get_value(meta, "model_version");
-	if (mversion_val == NULL) {
-		err("missing attribute \"model_version\"");
-		return -1;
-	}
-
-	const char *mversion = json_string(mversion_val);
-	if (strcmp(mversion, OVNI_MODEL_VERSION) != 0) {
-		err("model version mismatch '%s' (expected '%s')",
-				mversion, OVNI_MODEL_VERSION);
-		return -1;
-	}
-
 	return 0;
 }
 
@@ -121,11 +109,11 @@ load_cpus(struct loom *loom, JSON_Object *meta)
 }
 
 int
-metadata_load(const char *path, struct loom *loom, struct proc *proc)
+metadata_load_proc(const char *path, struct loom *loom, struct proc *proc)
 {
 	JSON_Object *meta = load_json(path);
 	if (meta == NULL) {
-		err("cannot load metadata from file %s", path);
+		err("cannot load proc metadata from file %s", path);
 		return -1;
 	}
 
@@ -147,3 +135,25 @@ metadata_load(const char *path, struct loom *loom, struct proc *proc)
 
 	return 0;
 }
+
+int
+metadata_load_thread(const char *path, struct thread *thread)
+{
+	JSON_Object *meta = load_json(path);
+	if (meta == NULL) {
+		err("cannot load thread metadata from file %s", path);
+		return -1;
+	}
+
+	if (check_version(meta) != 0) {
+		err("version check failed");
+		return -1;
+	}
+
+	if (thread_load_metadata(thread, meta) != 0) {
+		err("cannot load thread attributes");
+		return -1;
+	}
+
+	return 0;
+}
diff --git a/src/emu/metadata.h b/src/emu/metadata.h
index a604660..3d6e9a9 100644
--- a/src/emu/metadata.h
+++ b/src/emu/metadata.h
@@ -7,7 +7,9 @@
 #include "common.h"
 struct loom;
 struct proc;
+struct thread;
 
-USE_RET int metadata_load(const char *path, struct loom *loom, struct proc *proc);
+USE_RET int metadata_load_proc(const char *path, struct loom *loom, struct proc *proc);
+USE_RET int metadata_load_thread(const char *path, struct thread *thread);
 
 #endif /* METADATA_H */
diff --git a/src/emu/system.c b/src/emu/system.c
index bd72ead..7ba5691 100644
--- a/src/emu/system.c
+++ b/src/emu/system.c
@@ -24,7 +24,7 @@
 struct bay;
 
 static struct thread *
-create_thread(struct proc *proc, const char *relpath)
+create_thread(struct proc *proc, const char *tracedir, const char *relpath)
 {
 	int tid;
 	if (thread_relpath_get_tid(relpath, &tid) != 0) {
@@ -50,6 +50,19 @@ create_thread(struct proc *proc, const char *relpath)
 		return NULL;
 	}
 
+	/* Build metadata path */
+	char mpath[PATH_MAX];
+	if (snprintf(mpath, PATH_MAX, "%s/%s/thread.%d.json",
+				tracedir, proc->id, tid) >= PATH_MAX) {
+		err("path too long");
+		return NULL;
+	}
+
+	if (metadata_load_thread(mpath, thread) != 0) {
+		err("cannot load metadata from %s", mpath);
+		return NULL;
+	}
+
 	if (proc_add_thread(proc, thread) != 0) {
 		err("failed to add thread to proc");
 		return NULL;
@@ -94,7 +107,7 @@ create_proc(struct loom *loom, const char *tracedir, const char *relpath)
 	}
 
 	/* Load metadata too */
-	if (metadata_load(mpath, loom, proc) != 0) {
+	if (metadata_load_proc(mpath, loom, proc) != 0) {
 		err("cannot load metadata from %s", mpath);
 		return NULL;
 	}
@@ -185,7 +198,7 @@ create_system(struct system *sys, struct trace *trace)
 			return -1;
 		}
 
-		struct thread *thread = create_thread(proc, s->relpath);
+		struct thread *thread = create_thread(proc, dir, s->relpath);
 		if (thread == NULL) {
 			err("create_thread failed");
 			return -1;
diff --git a/src/emu/thread.c b/src/emu/thread.c
index 0536a2d..7660c38 100644
--- a/src/emu/thread.c
+++ b/src/emu/thread.c
@@ -152,6 +152,11 @@ thread_init_end(struct thread *th)
 		return -1;
 	}
 
+	if (th->meta == NULL) {
+		err("missing metadata for thread %s", th->id);
+		return -1;
+	}
+
 	for (int i = 0; i < TH_CHAN_MAX; i++) {
 		chan_init(&th->chan[i], CHAN_SINGLE,
 				chan_fmt, th->gindex, chan_name[i]);
@@ -439,3 +444,16 @@ thread_migrate_cpu(struct thread *th, struct cpu *cpu)
 
 	return 0;
 }
+
+int
+thread_load_metadata(struct thread *thread, JSON_Object *meta)
+{
+	if (thread->meta != NULL) {
+		err("thread %s already loaded metadata", thread->id);
+		return -1;
+	}
+
+	thread->meta = meta;
+
+	return 0;
+}
diff --git a/src/emu/thread.h b/src/emu/thread.h
index 281bdd6..97bc6ae 100644
--- a/src/emu/thread.h
+++ b/src/emu/thread.h
@@ -11,6 +11,7 @@
 #include "common.h"
 #include "extend.h"
 #include "uthash.h"
+#include "parson.h"
 struct bay;
 struct cpu;
 struct mux;
@@ -70,6 +71,9 @@ struct thread {
 
 	struct chan chan[TH_CHAN_MAX];
 
+	/* Metadata */
+	JSON_Object *meta;
+
 	struct extend ext;
 
 	UT_hash_handle hh; /* threads in the process */
@@ -78,6 +82,7 @@ struct thread {
 USE_RET int thread_relpath_get_tid(const char *relpath, int *tid);
 USE_RET int thread_init_begin(struct thread *thread, const char *relpath);
 USE_RET int thread_init_end(struct thread *thread);
+USE_RET int thread_load_metadata(struct thread *thread, JSON_Object *meta);
 USE_RET int thread_set_state(struct thread *th, enum thread_state state);
 USE_RET int thread_set_cpu(struct thread *th, struct cpu *cpu);
 USE_RET int thread_unset_cpu(struct thread *th);