diff --git a/upub/cli/src/lib.rs b/upub/cli/src/lib.rs
index 4371ff5..0787a4b 100644
--- a/upub/cli/src/lib.rs
+++ b/upub/cli/src/lib.rs
@@ -19,6 +19,9 @@ pub use update::*;
 mod nuke;
 pub use nuke::*;
 
+mod thread;
+pub use thread::*;
+
 #[derive(Debug, Clone, clap::Subcommand)]
 pub enum CliCommand {
 	/// generate fake user, note and activity
@@ -104,6 +107,11 @@ pub enum CliCommand {
 		/// also send Delete activities for all local objects
 		#[arg(long, default_value_t = false)]
 		delete_objects: bool,
+	},
+
+	/// attempt to fix broken threads and completely gather their context
+	Thread {
+		
 	}
 }
 
@@ -124,5 +132,7 @@ pub async fn run(ctx: upub::Context, command: CliCommand) -> Result<(), Box<dyn
 			Ok(register(ctx, username, password, display_name, summary, avatar_url, banner_url).await?),
 		CliCommand::Nuke { for_real, delete_objects } =>
 			Ok(nuke(ctx, for_real, delete_objects).await?),
+		CliCommand::Thread { } =>
+			Ok(thread(ctx).await?),
 	}
 }
diff --git a/upub/cli/src/thread.rs b/upub/cli/src/thread.rs
new file mode 100644
index 0000000..b22ddd0
--- /dev/null
+++ b/upub/cli/src/thread.rs
@@ -0,0 +1,34 @@
+use sea_orm::{ColumnTrait, EntityTrait, IntoActiveModel, QueryFilter};
+use upub::traits::{fetch::PullError, Fetcher};
+
+pub async fn thread(ctx: upub::Context) -> Result<(), PullError> {
+	use futures::TryStreamExt;
+	let db = ctx.db();
+
+	tracing::info!("fixing contexts...");
+	let mut stream = upub::model::object::Entity::find()
+		.filter(upub::model::object::Column::Context.is_null())
+		.stream(db)
+		.await?;
+
+	while let Some(mut object) = stream.try_next().await? {
+		match object.in_reply_to {
+			None => object.context = Some(object.id.clone()),
+			Some(ref in_reply_to) => {
+				let reply = ctx.fetch_object(in_reply_to, ctx.db()).await?;
+				if let Some(context) = reply.context {
+					object.context = Some(context);
+				} else {
+					continue;
+				}
+			},
+		}
+		tracing::info!("updating context of {}", object.id);
+		upub::model::object::Entity::update(object.into_active_model())
+			.exec(ctx.db())
+			.await?;
+	}
+
+	tracing::info!("done fixing contexts");
+	Ok(())
+}