diff --git a/crates/utopia-server/src/api/chat_graph_citation_tests.rs b/crates/utopia-server/src/api/chat_graph_citation_tests.rs
index 7700a17d8..f5c23b284 100644
--- a/crates/utopia-server/src/api/chat_graph_citation_tests.rs
+++ b/crates/utopia-server/src/api/chat_graph_citation_tests.rs
@@ -15,8 +15,9 @@
 //! - 检索和图谱工具在一轮里共用一个号：图谱引到检索登过的块，号不变、补上那句话；只补了
 //!   引文、条数没变，来源帧也再发一次
 //! - 原句里没有的日期在行上说出来（#970）：时间线推出来的终点写出关上它的那一行、带那一行
-//!   的号，人改过的区间写出修正备注、不带号；本行的号照旧。对话与 MCP 一样（MCP 不带号），
-//!   规则 4 说推出的终点引关它的那一行，两种日期都不归到本行的原句
+//!   的号（那一行没有有效证据时不带号，清单里也不多一条），人改过的区间写出修正备注、不带号；
+//!   本行的号照旧。对话与 MCP 一样（MCP 不带号），规则 4 说推出的终点引关它的那一行，两种
+//!   日期都不归到本行的原句
 //!
 //! 没有 `UTOPIA_DATABASE_URL` 时跳过而不是失败。自建自拆，绝不碰已有的库。
 use super::*;
@@ -625,7 +626,8 @@ async fn a_quote_added_to_a_search_hit_is_published() -> anyhow::Result<()> {
 
 /// #970 的两处：周七 2025-09-01 接手，时间线把李四那一段关在那天；人把张三的起点从章程的
 /// 2023-01-10 改成 2023-02-01。两行的号仍打开它们读出来的原句，而原句里没有这两个日期，
-/// 所以行上说出日期从哪来
+/// 所以行上说出日期从哪来。周七那篇删掉以后，关上李四那段的那一行没有有效证据：行上照旧
+/// 写出是他接手，不带号
 #[tokio::test]
 async fn a_fact_line_says_when_a_date_is_not_the_passages() -> anyhow::Result<()> {
     let Some(f) = fixture(Scripted::new(vec![])).await? else {
@@ -845,6 +847,44 @@ async fn a_fact_line_says_when_a_date_is_not_the_passages() -> anyhow::Result<()
                 .contains("2023-02-01 → 2024-07-01, corrected: The handover was on 1 July)"),
             "{text}"
         );
+
+        // 关上李四那段的那一行没有有效证据了（周七那篇删了，#986 的评审）：行上照旧写出是
+        // 谁接手，只是不带号，清单里也不多一条；本行的号照旧打开交接那篇
+        sqlx::query("UPDATE documents SET deleted_at = now() WHERE id = $1")
+            .bind(d_update)
+            .execute(&f.pool)
+            .await?;
+        let mut sink = ToolSink::default();
+        for tool in ["entity_facts", "neighbors", "timeline"] {
+            let text = dispatch(&chat, &mut sink, tool, &json!({"entity": "Project Aurora"}))
+                .await
+                .text;
+            let li_line = line(&text, "Li Si");
+            assert!(
+                li_line.contains("2024-07-05 → 2025-09-01, superseded by Zhou Qi)"),
+                "{tool}: {text}"
+            );
+            let l = marks(li_line);
+            assert_eq!(l.len(), 1, "{tool}: {text}");
+            assert_eq!(chunk_of(&sink, l[0]), s.handover, "{tool}: the line's own passage");
+        }
+        let path = dispatch(
+            &chat,
+            &mut sink,
+            "paths_between",
+            &json!({"from": "Wang Wu", "to": "Li Si"}),
+        )
+        .await
+        .text;
+        assert!(
+            path.contains("2024-07-05 → 2025-09-01, superseded by Zhou Qi)"),
+            "{path}"
+        );
+        assert!(
+            !sink.source_ids.contains(&update.to_string()),
+            "a closer without live evidence adds no entry: {:?}",
+            sink.sources
+        );
         anyhow::Ok(())
     }
     .await;
diff --git a/crates/utopia-store/tests/store/a_fact_says_where_its_dates_came_from.rs b/crates/utopia-store/tests/store/a_fact_says_where_its_dates_came_from.rs
index 5c8031856..a2857ee0a 100644
--- a/crates/utopia-store/tests/store/a_fact_says_where_its_dates_came_from.rs
+++ b/crates/utopia-store/tests/store/a_fact_says_where_its_dates_came_from.rs
@@ -306,3 +306,108 @@ async fn a_fact_says_where_its_dates_came_from() -> anyhow::Result<()> {
         .await?;
     run
 }
+
+/// 关闭者的两种情形（#986 合并时的评审）：
+/// - 同一天开始的两个后任：时间线按 id 取最先的那一行关上前任，行上说的也是它；
+/// - 关闭者自己后来又被下一任关上，改写成了新的一行：说的是活着的那一版，名字不变
+#[tokio::test]
+async fn a_closer_is_the_row_the_timeline_closed_with() -> anyhow::Result<()> {
+    let Some(url) = utopia_store::test_db::url() else {
+        return Ok(());
+    };
+    let pool = PgPool::connect(&url).await?;
+    let ids: Vec<Uuid> = (0..12).map(|_| Uuid::now_v7()).collect();
+    let (org, ws, kb, person, project, leads) = (ids[0], ids[1], ids[2], ids[3], ids[4], ids[5]);
+    let (li, zhou, sun, qian, aurora, helios) = (ids[6], ids[7], ids[8], ids[9], ids[10], ids[11]);
+    // Only locally generated UUIDs are interpolated into fixture SQL.
+    sqlx::raw_sql(&format!(
+        "INSERT INTO organizations (id, name) VALUES ('{org}', 'closers');
+         INSERT INTO workspaces (id, org_id, name) VALUES ('{ws}', '{org}', 'closers');
+         INSERT INTO knowledge_bases (id, workspace_id, name) VALUES ('{kb}', '{ws}', 'closers');
+         INSERT INTO entity_types (id, kb_id, key, label, color, shape) VALUES
+             ('{person}', '{kb}', 'person', 'person', '#7fd0ff', 'circle'),
+             ('{project}', '{kb}', 'project', 'project', '#7fd0ff', 'circle');
+         INSERT INTO relation_types (id, kb_id, key, label, temporal, inverse_functional)
+              VALUES ('{leads}', '{kb}', 'leads', 'leads', 'state', TRUE);
+         INSERT INTO entities (id, kb_id, type_id, canonical_name) VALUES
+             ('{li}', '{kb}', '{person}', 'Li Si'), ('{zhou}', '{kb}', '{person}', 'Zhou Qi'),
+             ('{sun}', '{kb}', '{person}', 'Sun Ba'), ('{qian}', '{kb}', '{person}', 'Qian Qi'),
+             ('{aurora}', '{kb}', '{project}', 'Aurora'), ('{helios}', '{kb}', '{project}', 'Helios');"
+    ))
+    .execute(&pool)
+    .await?;
+
+    let run = async {
+        let lead = |who: Uuid, project: Uuid, at: &'static str| {
+            let pool = pool.clone();
+            async move {
+                graph::insert_fact(&pool, kb, who, Some(leads), project, since(at), 0.9)
+                    .await
+                    .map(|(id, _)| id)
+            }
+        };
+        let live = |who: Uuid, project: Uuid| {
+            let pool = pool.clone();
+            async move {
+                sqlx::query_scalar::<_, Uuid>(
+                    "SELECT id FROM facts WHERE kb_id = $1 AND subject_id = $2 AND object_id = $3
+                        AND invalidated_at IS NULL",
+                )
+                .bind(kb)
+                .bind(who)
+                .bind(project)
+                .fetch_one(&pool)
+                .await
+            }
+        };
+
+        // Aurora：周七与孙八同一天接手。一个项目同时只有一个 lead，李四那段关在那一天，
+        // 关它的是 id 在前的周七那一行
+        let li_a = lead(li, aurora, "2024-07-05").await?;
+        let zhou_a = lead(zhou, aurora, "2025-09-01").await?;
+        let sun_a = lead(sun, aurora, "2025-09-01").await?;
+        assert!(zhou_a < sun_a);
+        utopia_store::temporal::reconcile_moved_facts(&pool, kb, &[li_a, zhou_a, sun_a]).await?;
+        let (_, facts) = graph::entity_detail(&pool, kb, aurora, None, None).await?;
+        assert!(flags(&facts, "Li Si").0, "the timeline closed it");
+        assert_eq!(fact_of(&facts, "Li Si").valid_to, Some(day("2025-09-01")));
+        assert_eq!(
+            closer(&facts, "Li Si"),
+            (Some(zhou_a), Some("Zhou Qi".to_string())),
+            "the first of the two by id, as the engine orders them"
+        );
+
+        // Helios：周七接手之后又被钱七接手，周七那一行被关上、改写成新的一行。李四那段的
+        // 关闭者是周七活着的那一版
+        let li_h = lead(li, helios, "2024-07-05").await?;
+        let zhou_h = lead(zhou, helios, "2025-09-01").await?;
+        utopia_store::temporal::reconcile_moved_facts(&pool, kb, &[li_h, zhou_h]).await?;
+        let qian_h = lead(qian, helios, "2026-03-01").await?;
+        utopia_store::temporal::reconcile_moved_facts(&pool, kb, &[qian_h]).await?;
+        let zhou_now = live(zhou, helios).await?;
+        assert_ne!(
+            zhou_now, zhou_h,
+            "the closer was rewritten when Qian Qi took over"
+        );
+        let (_, facts) = graph::entity_detail(&pool, kb, helios, None, None).await?;
+        assert_eq!(fact_of(&facts, "Zhou Qi").valid_to, Some(day("2026-03-01")));
+        assert_eq!(fact_of(&facts, "Li Si").valid_to, Some(day("2025-09-01")));
+        assert_eq!(
+            closer(&facts, "Li Si"),
+            (Some(zhou_now), Some("Zhou Qi".to_string())),
+            "the live version of the closer"
+        );
+        assert_eq!(
+            closer(&facts, "Zhou Qi"),
+            (Some(qian_h), Some("Qian Qi".to_string()))
+        );
+        anyhow::Ok(())
+    }
+    .await;
+
+    sqlx::query("DELETE FROM organizations WHERE id = $1")
+        .bind(org)
+        .execute(&pool)
+        .await?;
+    run
+}
diff --git a/crates/utopia-store/tests/store/a_moment_marks_its_state.rs b/crates/utopia-store/tests/store/a_moment_marks_its_state.rs
index a756b6a27..7f2634eb8 100644
--- a/crates/utopia-store/tests/store/a_moment_marks_its_state.rs
+++ b/crates/utopia-store/tests/store/a_moment_marks_its_state.rs
@@ -170,6 +170,16 @@ impl Base {
 
     /// 签名 (phrase, person, organization) 绑到 works_for，照原文方向，说那个日期标什么
     async fn bind(&self, phrase: &str, marks: Option<&str>) -> anyhow::Result<()> {
+        self.bind_to(phrase, self.works_for, marks).await
+    }
+
+    /// 同 [`Base::bind`]，绑到这条属性
+    async fn bind_to(
+        &self,
+        phrase: &str,
+        property: Uuid,
+        marks: Option<&str>,
+    ) -> anyhow::Result<()> {
         sqlx::query(
             "INSERT INTO phrase_bindings
                  (id, kb_id, phrase, subject_type_id, object_type_id, object_is_value,
@@ -183,7 +193,7 @@ impl Base {
         .bind(phrase)
         .bind(self.person)
         .bind(self.company)
-        .bind(self.works_for)
+        .bind(property)
         .bind(marks)
         .execute(&self.pool)
         .await?;
@@ -1189,3 +1199,79 @@ async fn closing_a_simultaneous_conflict_at_its_own_start_is_refused() -> anyhow
     base.remove().await?;
     run
 }
+
+/// 人写的行不被第 0 步作废（#975 合并时补的守卫）。照它的来路造：属性原是事件，人写下一刻；
+/// 一条只说了那一刻的陈述物化时并进这一行，留下来源链接，行却不因此变成算出来的
+/// （`from_statement_id` 仍空）。后来本体页上把属性改成状态：这一行两端相等、有一条两端同值
+/// 的来源陈述，可它是人写的，不作废。同一句话另算出的那一行（带 `from_statement_id`）照旧作废
+#[tokio::test]
+async fn a_row_a_person_wrote_is_kept_when_a_single_date_merged_into_it() -> anyhow::Result<()> {
+    let Some(pool) = pool().await? else {
+        return Ok(());
+    };
+    let base = Base::new(&pool).await?;
+    let run = async {
+        let (by_hand, _) = graph::insert_fact(
+            &pool,
+            base.kb,
+            base.lin,
+            Some(base.acquired),
+            base.meridian,
+            moment(),
+            0.9,
+        )
+        .await?;
+        base.statement("signed with", Some(day()), Some(day()))
+            .await?;
+        let to_aster = base
+            .statement_to("signed with", base.aster, Some(day()), Some(day()), "day")
+            .await?;
+        base.bind_to("signed with", base.acquired, None).await?;
+        let outcome = materialize(&pool, base.kb).await?;
+        assert_eq!(
+            (outcome.added, outcome.merged),
+            (1, 1),
+            "one merged into the person's row, one computed: {outcome:?}"
+        );
+        let computed: Uuid =
+            sqlx::query_scalar("SELECT fact_id FROM typed_fact_sources WHERE statement_id = $1")
+                .bind(to_aster)
+                .fetch_one(&pool)
+                .await?;
+        let (from_statement, links): (Option<Uuid>, i64) = sqlx::query_as(
+            "SELECT from_statement_id,
+                    (SELECT count(*) FROM typed_fact_sources WHERE fact_id = f.id)
+               FROM facts f WHERE id = $1",
+        )
+        .bind(by_hand)
+        .fetch_one(&pool)
+        .await?;
+        assert_eq!(
+            (from_statement, links),
+            (None, 1),
+            "the statement is a source of the person's row, which stays a person's"
+        );
+
+        // 本体页上把 acquired 改成状态
+        sqlx::query("UPDATE relation_types SET temporal = 'state' WHERE id = $1")
+            .bind(base.acquired)
+            .execute(&pool)
+            .await?;
+        let outcome = materialize(&pool, base.kb).await?;
+        assert_eq!(outcome.retired, 1, "only the computed row: {outcome:?}");
+        assert_eq!(
+            base.live(by_hand).await?,
+            (true, Some(day())),
+            "a row a person wrote is kept"
+        );
+        assert_eq!(
+            base.live(computed).await?,
+            (false, Some(day())),
+            "the computed one is retired"
+        );
+        anyhow::Ok(())
+    }
+    .await;
+    base.remove().await?;
+    run
+}