diff --git a/crates/adapters/postgres/src/thought.rs b/crates/adapters/postgres/src/thought.rs
index d28bfd5..a5a82d0 100644
--- a/crates/adapters/postgres/src/thought.rs
+++ b/crates/adapters/postgres/src/thought.rs
@@ -1,2 +1,236 @@
-pub struct PgThoughtRepository { _pool: sqlx::PgPool }
-impl PgThoughtRepository { pub fn new(pool: sqlx::PgPool) -> Self { Self { _pool: pool } } }
+use async_trait::async_trait;
+use chrono::{DateTime, Utc};
+use sqlx::PgPool;
+use domain::{
+    errors::DomainError,
+    models::{
+        feed::{FeedEntry, PageParams, Paginated},
+        thought::{Thought, Visibility},
+        user::User,
+    },
+    ports::ThoughtRepository,
+    value_objects::{Content, Email, PasswordHash, ThoughtId, UserId, Username},
+};
+
+pub struct PgThoughtRepository { pool: PgPool }
+impl PgThoughtRepository { pub fn new(pool: PgPool) -> Self { Self { pool } } }
+
+#[derive(sqlx::FromRow)]
+pub(crate) struct ThoughtRow {
+    pub id: uuid::Uuid,
+    pub user_id: uuid::Uuid,
+    pub content: String,
+    pub in_reply_to_id: Option<uuid::Uuid>,
+    pub in_reply_to_url: Option<String>,
+    pub ap_id: Option<String>,
+    pub visibility: String,
+    pub content_warning: Option<String>,
+    pub sensitive: bool,
+    pub local: bool,
+    pub created_at: DateTime<Utc>,
+    pub updated_at: Option<DateTime<Utc>>,
+}
+
+impl From<ThoughtRow> for Thought {
+    fn from(r: ThoughtRow) -> Self {
+        Thought {
+            id: ThoughtId::from_uuid(r.id),
+            user_id: UserId::from_uuid(r.user_id),
+            content: Content::new_remote(r.content),
+            in_reply_to_id: r.in_reply_to_id.map(ThoughtId::from_uuid),
+            in_reply_to_url: r.in_reply_to_url,
+            ap_id: r.ap_id,
+            visibility: Visibility::from_str(&r.visibility),
+            content_warning: r.content_warning,
+            sensitive: r.sensitive,
+            local: r.local,
+            created_at: r.created_at,
+            updated_at: r.updated_at,
+        }
+    }
+}
+
+const THOUGHT_SELECT: &str =
+    "SELECT id,user_id,content,in_reply_to_id,in_reply_to_url,ap_id,visibility,content_warning,sensitive,local,created_at,updated_at FROM thoughts";
+
+#[async_trait]
+impl ThoughtRepository for PgThoughtRepository {
+    async fn save(&self, t: &Thought) -> Result<(), DomainError> {
+        sqlx::query(
+            "INSERT INTO thoughts(id,user_id,content,in_reply_to_id,in_reply_to_url,ap_id,visibility,content_warning,sensitive,local,created_at)
+             VALUES($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11)
+             ON CONFLICT(id) DO UPDATE SET content=EXCLUDED.content,updated_at=NOW()"
+        )
+        .bind(t.id.as_uuid())
+        .bind(t.user_id.as_uuid())
+        .bind(t.content.as_str())
+        .bind(t.in_reply_to_id.as_ref().map(|x| x.as_uuid()))
+        .bind(&t.in_reply_to_url)
+        .bind(&t.ap_id)
+        .bind(t.visibility.as_str())
+        .bind(&t.content_warning)
+        .bind(t.sensitive)
+        .bind(t.local)
+        .bind(t.created_at)
+        .execute(&self.pool)
+        .await
+        .map_err(|e| DomainError::Internal(e.to_string()))
+        .map(|_| ())
+    }
+
+    async fn find_by_id(&self, id: &ThoughtId) -> Result<Option<Thought>, DomainError> {
+        sqlx::query_as::<_, ThoughtRow>(&format!("{THOUGHT_SELECT} WHERE id=$1"))
+            .bind(id.as_uuid())
+            .fetch_optional(&self.pool)
+            .await
+            .map_err(|e| DomainError::Internal(e.to_string()))
+            .map(|o| o.map(Thought::from))
+    }
+
+    async fn delete(&self, id: &ThoughtId, user_id: &UserId) -> Result<(), DomainError> {
+        let r = sqlx::query("DELETE FROM thoughts WHERE id=$1 AND user_id=$2")
+            .bind(id.as_uuid())
+            .bind(user_id.as_uuid())
+            .execute(&self.pool)
+            .await
+            .map_err(|e| DomainError::Internal(e.to_string()))?;
+        if r.rows_affected() == 0 { return Err(DomainError::NotFound); }
+        Ok(())
+    }
+
+    async fn update_content(&self, id: &ThoughtId, content: &Content) -> Result<(), DomainError> {
+        sqlx::query("UPDATE thoughts SET content=$2,updated_at=NOW() WHERE id=$1")
+            .bind(id.as_uuid())
+            .bind(content.as_str())
+            .execute(&self.pool)
+            .await
+            .map_err(|e| DomainError::Internal(e.to_string()))
+            .map(|_| ())
+    }
+
+    async fn get_thread(&self, id: &ThoughtId) -> Result<Vec<Thought>, DomainError> {
+        sqlx::query_as::<_, ThoughtRow>(
+            &format!("{THOUGHT_SELECT} WHERE id=$1 OR in_reply_to_id=$1 ORDER BY created_at ASC")
+        )
+        .bind(id.as_uuid())
+        .fetch_all(&self.pool)
+        .await
+        .map_err(|e| DomainError::Internal(e.to_string()))
+        .map(|rows| rows.into_iter().map(Thought::from).collect())
+    }
+
+    async fn list_by_user(&self, user_id: &UserId, page: &PageParams) -> Result<Paginated<FeedEntry>, DomainError> {
+        let total: i64 = sqlx::query_scalar("SELECT COUNT(*) FROM thoughts WHERE user_id=$1")
+            .bind(user_id.as_uuid())
+            .fetch_one(&self.pool)
+            .await
+            .map_err(|e| DomainError::Internal(e.to_string()))?;
+
+        let rows = sqlx::query_as::<_, ThoughtRow>(
+            &format!("{THOUGHT_SELECT} WHERE user_id=$1 ORDER BY created_at DESC LIMIT $2 OFFSET $3")
+        )
+        .bind(user_id.as_uuid())
+        .bind(page.limit())
+        .bind(page.offset())
+        .fetch_all(&self.pool)
+        .await
+        .map_err(|e| DomainError::Internal(e.to_string()))?;
+
+        let author = sqlx::query_as::<_, crate::user::UserRow>(
+            "SELECT id,username,email,password_hash,display_name,bio,avatar_url,header_url,custom_css,local,ap_id,inbox_url,public_key,private_key,created_at,updated_at FROM users WHERE id=$1"
+        )
+        .bind(user_id.as_uuid())
+        .fetch_optional(&self.pool)
+        .await
+        .map_err(|e| DomainError::Internal(e.to_string()))?
+        .ok_or(DomainError::NotFound)?;
+        let author = User::from(author);
+
+        let items = rows.into_iter().map(|r| {
+            let thought = Thought::from(r);
+            FeedEntry {
+                thought,
+                author: author.clone(),
+                like_count: 0,
+                boost_count: 0,
+                reply_count: 0,
+                liked_by_viewer: false,
+                boosted_by_viewer: false,
+            }
+        }).collect();
+
+        Ok(Paginated { items, total, page: page.page, per_page: page.per_page })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use domain::{models::{thought::{Thought, Visibility}, user::User}, value_objects::*};
+    use crate::user::PgUserRepository;
+    use domain::ports::UserRepository;
+
+    async fn seed_user(pool: &sqlx::PgPool, username: &str, email: &str) -> User {
+        let repo = PgUserRepository::new(pool.clone());
+        let u = User::new_local(
+            UserId::new(),
+            Username::new(username).unwrap(),
+            Email::new(email).unwrap(),
+            PasswordHash("h".into()),
+        );
+        repo.save(&u).await.unwrap();
+        u
+    }
+
+    #[sqlx::test(migrations = "./migrations")]
+    async fn save_and_find_thought(pool: sqlx::PgPool) {
+        let user = seed_user(&pool, "alice", "alice@ex.com").await;
+        let repo = PgThoughtRepository::new(pool);
+        let t = Thought::new_local(
+            ThoughtId::new(),
+            user.id.clone(),
+            Content::new_local("hello world").unwrap(),
+            None,
+            Visibility::Public,
+            None,
+            false,
+        );
+        repo.save(&t).await.unwrap();
+        let found = repo.find_by_id(&t.id).await.unwrap().unwrap();
+        assert_eq!(found.content.as_str(), "hello world");
+        assert!(found.local);
+    }
+
+    #[sqlx::test(migrations = "./migrations")]
+    async fn delete_thought(pool: sqlx::PgPool) {
+        let user = seed_user(&pool, "bob", "bob@ex.com").await;
+        let repo = PgThoughtRepository::new(pool);
+        let t = Thought::new_local(ThoughtId::new(), user.id.clone(), Content::new_local("bye").unwrap(), None, Visibility::Public, None, false);
+        repo.save(&t).await.unwrap();
+        repo.delete(&t.id, &user.id).await.unwrap();
+        assert!(repo.find_by_id(&t.id).await.unwrap().is_none());
+    }
+
+    #[sqlx::test(migrations = "./migrations")]
+    async fn delete_wrong_owner_returns_not_found(pool: sqlx::PgPool) {
+        let alice = seed_user(&pool, "alice", "alice@ex.com").await;
+        let bob = seed_user(&pool, "bob", "bob@ex.com").await;
+        let repo = PgThoughtRepository::new(pool);
+        let t = Thought::new_local(ThoughtId::new(), alice.id.clone(), Content::new_local("secret").unwrap(), None, Visibility::Public, None, false);
+        repo.save(&t).await.unwrap();
+        let err = repo.delete(&t.id, &bob.id).await.unwrap_err();
+        assert!(matches!(err, DomainError::NotFound));
+    }
+
+    #[sqlx::test(migrations = "./migrations")]
+    async fn get_thread_returns_root_and_replies(pool: sqlx::PgPool) {
+        let user = seed_user(&pool, "charlie", "charlie@ex.com").await;
+        let repo = PgThoughtRepository::new(pool);
+        let root = Thought::new_local(ThoughtId::new(), user.id.clone(), Content::new_local("root").unwrap(), None, Visibility::Public, None, false);
+        let reply = Thought::new_local(ThoughtId::new(), user.id.clone(), Content::new_local("reply").unwrap(), Some(root.id.clone()), Visibility::Public, None, false);
+        repo.save(&root).await.unwrap();
+        repo.save(&reply).await.unwrap();
+        let thread = repo.get_thread(&root.id).await.unwrap();
+        assert_eq!(thread.len(), 2);
+    }
+}