diff --git a/packages/db/src/migrations/0100_pipeline_case_issue_unlinked_event.sql b/packages/db/src/migrations/0100_pipeline_case_issue_unlinked_event.sql
new file mode 100644
index 00000000000..1002c09957d
--- /dev/null
+++ b/packages/db/src/migrations/0100_pipeline_case_issue_unlinked_event.sql
@@ -0,0 +1,20 @@
+ALTER TABLE "pipeline_case_events" DROP CONSTRAINT "pipeline_case_events_type_check";--> statement-breakpoint
+ALTER TABLE "pipeline_case_events" ADD CONSTRAINT "pipeline_case_events_type_check" CHECK ("pipeline_case_events"."type" in (
+        'ingested',
+        'updated',
+        'claimed',
+        'lease_released',
+        'lease_expired',
+        'transitioned',
+        'transition_suggested',
+        'suggestion_resolved',
+        'review_decided',
+        'conversation_opened',
+        'issue_linked',
+        'issue_unlinked',
+        'automation_executed',
+        'automation_failed',
+        'blockers_set',
+        'blockers_resolved',
+        'children_terminal'
+      ));
diff --git a/packages/db/src/migrations/meta/_journal.json b/packages/db/src/migrations/meta/_journal.json
index 423634caf68..f4ed1df9750 100644
--- a/packages/db/src/migrations/meta/_journal.json
+++ b/packages/db/src/migrations/meta/_journal.json
@@ -701,6 +701,13 @@
       "when": 1781044473360,
       "tag": "0099_moaning_ricochet",
       "breakpoints": true
+    },
+    {
+      "idx": 100,
+      "version": "7",
+      "when": 1781059200000,
+      "tag": "0100_pipeline_case_issue_unlinked_event",
+      "breakpoints": true
     }
   ]
 }
diff --git a/packages/db/src/schema/pipeline_case_events.ts b/packages/db/src/schema/pipeline_case_events.ts
index a5c0febc085..3ee580635d5 100644
--- a/packages/db/src/schema/pipeline_case_events.ts
+++ b/packages/db/src/schema/pipeline_case_events.ts
@@ -39,6 +39,7 @@ export const pipelineCaseEvents = pgTable(
         'review_decided',
         'conversation_opened',
         'issue_linked',
+        'issue_unlinked',
         'automation_executed',
         'automation_failed',
         'blockers_set',
diff --git a/server/src/__tests__/pipelines-routes.test.ts b/server/src/__tests__/pipelines-routes.test.ts
index 3a682ec5fc5..3039fc33592 100644
--- a/server/src/__tests__/pipelines-routes.test.ts
+++ b/server/src/__tests__/pipelines-routes.test.ts
@@ -1,4 +1,5 @@
 import { randomUUID } from "node:crypto";
+import { eq } from "drizzle-orm";
 import express from "express";
 import request from "supertest";
 import { afterAll, afterEach, beforeAll, describe, expect, it } from "vitest";
@@ -235,6 +236,54 @@ describeEmbeddedPostgres("pipeline routes", () => {
     await http.delete(`/api/pipelines/${pipelineId}/stages/${stageId}?moveCasesToStageId=${qaStage.body.id}`).expect(200);
   });
 
+  it("writes an audit event when an agent removes a case issue link", async () => {
+    const company = await seedCompany();
+    const [agent] = await db.insert(agents).values({
+      companyId: company.id,
+      name: "Pipeline Agent",
+      role: "engineer",
+      adapterType: "codex_local",
+    }).returning();
+    const runId = randomUUID();
+    const agentActor: Express.Request["actor"] = {
+      type: "agent",
+      agentId: agent!.id,
+      companyId: company.id,
+      runId,
+      source: "agent_key",
+    };
+    const http = request(app(agentActor));
+    const pipeline = await http.post(`/api/companies/${company.id}/pipelines`).send({ key: "unlink", name: "Unlink audit" }).expect(201);
+    const created = await http
+      .post(`/api/pipelines/${pipeline.body.id}/cases`)
+      .send({ caseKey: "unlink", title: "Unlink audit" })
+      .expect(201);
+    const [issue] = await db.insert(issues).values({
+      companyId: company.id,
+      title: "Linked work",
+      status: "todo",
+      priority: "medium",
+    }).returning();
+
+    const link = await http
+      .post(`/api/cases/${created.body.case.id}/issue-links`)
+      .send({ issueId: issue!.id, role: "work" })
+      .expect(201);
+    await http.delete(`/api/cases/${created.body.case.id}/issue-links/${link.body.id}`).expect(200);
+
+    const events = await http.get(`/api/cases/${created.body.case.id}/events`).expect(200);
+    const linkEvents = events.body.items.filter((event: { type: string }) => event.type === "issue_linked" || event.type === "issue_unlinked");
+    expect(linkEvents.map((event: { type: string }) => event.type)).toEqual(["issue_linked", "issue_unlinked"]);
+    expect(linkEvents[1]).toMatchObject({
+      actorType: "agent",
+      actorAgentId: agent!.id,
+      runId,
+      payload: { issueId: issue!.id, role: "work", linkId: link.body.id },
+    });
+    const remainingLinks = await db.select().from(pipelineCaseIssueLinks).where(eq(pipelineCaseIssueLinks.id, link.body.id));
+    expect(remainingLinks).toHaveLength(0);
+  });
+
   it("paginates and caps case event responses", async () => {
     const company = await seedCompany();
     const http = request(app(boardActor));
diff --git a/server/src/routes/pipelines.ts b/server/src/routes/pipelines.ts
index 271347e7ded..02b655941a3 100644
--- a/server/src/routes/pipelines.ts
+++ b/server/src/routes/pipelines.ts
@@ -732,19 +732,22 @@ export function pipelineRoutes(db: Db, options: Parameters<typeof pipelineServic
       .then((rows) => rows[0] ?? null);
     if (!targetIssue || targetIssue.companyId !== companyId) throw notFound("Issue not found");
     try {
-      const [link] = await db.insert(pipelineCaseIssueLinks).values({
-        companyId,
-        caseId,
-        issueId: req.body.issueId,
-        role: req.body.role,
-        createdByRunId: actor.type === "agent" ? actor.runId : null,
-      }).returning();
-      await writeRouteEvent(db, {
-        companyId,
-        caseId,
-        type: "issue_linked",
-        actor,
-        payload: { issueId: req.body.issueId, role: req.body.role },
+      const link = await db.transaction(async (tx) => {
+        const [created] = await tx.insert(pipelineCaseIssueLinks).values({
+          companyId,
+          caseId,
+          issueId: req.body.issueId,
+          role: req.body.role,
+          createdByRunId: actor.type === "agent" ? actor.runId : null,
+        }).returning();
+        await writeRouteEvent(tx, {
+          companyId,
+          caseId,
+          type: "issue_linked",
+          actor,
+          payload: { issueId: req.body.issueId, role: req.body.role },
+        });
+        return created!;
       });
       res.status(201).json(link);
     } catch (error) {
@@ -756,15 +759,26 @@ export function pipelineRoutes(db: Db, options: Parameters<typeof pipelineServic
     const caseId = req.params.caseId as string;
     const linkId = req.params.linkId as string;
     const companyId = await assertCaseAccess(db, req, caseId);
-    actorForMutation(req);
-    const [deleted] = await db
-      .delete(pipelineCaseIssueLinks)
-      .where(and(
-        eq(pipelineCaseIssueLinks.id, linkId),
-        eq(pipelineCaseIssueLinks.companyId, companyId),
-        eq(pipelineCaseIssueLinks.caseId, caseId),
-      ))
-      .returning();
+    const actor = actorForMutation(req);
+    const deleted = await db.transaction(async (tx) => {
+      const [removed] = await tx
+        .delete(pipelineCaseIssueLinks)
+        .where(and(
+          eq(pipelineCaseIssueLinks.id, linkId),
+          eq(pipelineCaseIssueLinks.companyId, companyId),
+          eq(pipelineCaseIssueLinks.caseId, caseId),
+        ))
+        .returning();
+      if (!removed) return null;
+      await writeRouteEvent(tx, {
+        companyId,
+        caseId,
+        type: "issue_unlinked",
+        actor,
+        payload: { issueId: removed.issueId, role: removed.role, linkId: removed.id },
+      });
+      return removed;
+    });
     if (!deleted) throw notFound("Pipeline case issue link not found");
     res.json({ deleted: true });
   });