diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 7add63b397b..baf05a74084 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -6,6 +6,9 @@ importers:
   .:
     configDependencies: {}
     packageManagerDependencies:
+      '@pnpm/exe':
+        specifier: 12.0.0
+        version: 12.0.0
       pnpm:
         specifier: 12.0.0
         version: 12.0.0
@@ -56,6 +59,11 @@ packages:
     cpu: [x64]
     os: [win32]
 
+  '@pnpm/exe@12.0.0':
+    resolution: {integrity: sha512-405vw2qYPPghNxoPRt2cvkGtGNU5gnInDcIe5TztQxe73yUZLqFJN/jCJFGs1xbVaIWDXEVuQ71P8npFZeatZQ==}
+    engines: {node: '>=18.*'}
+    hasBin: true
+
   pnpm@12.0.0:
     resolution: {integrity: sha512-ni49w5EZlYaNyUuBdcIXwn6VQI+gO0oidJd48rNPdzt3zdOznt6BcbIvzVO+ajU0Lp+smUimjvWN9kiM6Jp+Zw==}
     engines: {node: '>=18.*'}
@@ -87,6 +95,17 @@ snapshots:
   '@pnpm/exe.win32-x64@12.0.0':
     optional: true
 
+  '@pnpm/exe@12.0.0':
+    optionalDependencies:
+      '@pnpm/exe.darwin-arm64': 12.0.0
+      '@pnpm/exe.darwin-x64': 12.0.0
+      '@pnpm/exe.linux-arm64': 12.0.0
+      '@pnpm/exe.linux-arm64-musl': 12.0.0
+      '@pnpm/exe.linux-x64': 12.0.0
+      '@pnpm/exe.linux-x64-musl': 12.0.0
+      '@pnpm/exe.win32-arm64': 12.0.0
+      '@pnpm/exe.win32-x64': 12.0.0
+
   pnpm@12.0.0:
     optionalDependencies:
       '@pnpm/exe.darwin-arm64': 12.0.0
diff --git a/src/main/runtime/orchestration/db/row-column-lists.ts b/src/main/runtime/orchestration/db/row-column-lists.ts
index 368c97ede3c..8148885de06 100644
--- a/src/main/runtime/orchestration/db/row-column-lists.ts
+++ b/src/main/runtime/orchestration/db/row-column-lists.ts
@@ -12,6 +12,7 @@ export const RUN_COLUMNS = [
   'objective',
   'home_database',
   'coordinator_handle',
+  'coordinator_agent_session_id',
   'coordinator_pane_key',
   'consumer_generation',
   'legacy',
diff --git a/src/main/runtime/orchestration/db/runs/run-create.ts b/src/main/runtime/orchestration/db/runs/run-create.ts
index 3f99e018936..efb56a8667a 100644
--- a/src/main/runtime/orchestration/db/runs/run-create.ts
+++ b/src/main/runtime/orchestration/db/runs/run-create.ts
@@ -10,6 +10,7 @@ export function createRun(
     objective: string
     coordinatorHandle: string
     coordinatorPaneKey: string
+    coordinatorAgentSessionId?: string | null
   }
 ): RunRow {
   const id = generateId('run')
@@ -19,11 +20,17 @@ export function createRun(
     this.db
       .prepare(
         `INSERT INTO runs (
-           id, objective, coordinator_handle, coordinator_pane_key,
+           id, objective, coordinator_handle, coordinator_pane_key, coordinator_agent_session_id,
            consumer_generation, legacy
          ) VALUES (?, ?, ?, ?, 1, 0)`
       )
-      .run(id, params.objective, params.coordinatorHandle, params.coordinatorPaneKey)
+      .run(
+        id,
+        params.objective,
+        params.coordinatorHandle,
+        params.coordinatorPaneKey,
+        params.coordinatorAgentSessionId ?? null
+      )
     this.rememberRunCoordinatorHandle(id, params.coordinatorHandle)
     this.db.exec('COMMIT')
   } catch (error) {
diff --git a/src/main/runtime/orchestration/db/schema/create-core-tables-sql.ts b/src/main/runtime/orchestration/db/schema/create-core-tables-sql.ts
index f02e7e8c15a..dee412c768c 100644
--- a/src/main/runtime/orchestration/db/schema/create-core-tables-sql.ts
+++ b/src/main/runtime/orchestration/db/schema/create-core-tables-sql.ts
@@ -7,6 +7,7 @@ CREATE TABLE IF NOT EXISTS runs (
   objective             TEXT NOT NULL,
   home_database         TEXT NOT NULL DEFAULT 'this_database',
   coordinator_handle    TEXT,
+  coordinator_agent_session_id TEXT,
   coordinator_pane_key  TEXT,
   consumer_generation   INTEGER NOT NULL DEFAULT 0,
   legacy                INTEGER NOT NULL DEFAULT 0,
diff --git a/src/main/runtime/orchestration/db/schema/migrate-v2-v12.ts b/src/main/runtime/orchestration/db/schema/migrate-v2-v12.ts
index 140a4116030..ffa2c117932 100644
--- a/src/main/runtime/orchestration/db/schema/migrate-v2-v12.ts
+++ b/src/main/runtime/orchestration/db/schema/migrate-v2-v12.ts
@@ -2,6 +2,10 @@ import { LEGACY_RUN_ID } from '../contract-constants'
 import type { OrchestrationDb } from '../orchestration-db'
 
 export function applySchemaMigrationsV2ToV12(this: OrchestrationDb, current: number): void {
+  // Session identity is authoritative for orchestration; retain terminal columns during migration.
+  if (!this.hasColumn('runs', 'coordinator_agent_session_id')) {
+    this.db.exec('ALTER TABLE runs ADD COLUMN coordinator_agent_session_id TEXT')
+  }
   // v1 → v2: SQLite can't ALTER a CHECK, so rebuild messages to allow 'heartbeat'; fold in v3's delivered_at to skip a second rebuild.
   if (current < 2) {
     if (!this.hasColumn('dispatch_contexts', 'last_heartbeat_at')) {
diff --git a/src/main/runtime/orchestration/types.ts b/src/main/runtime/orchestration/types.ts
index 85d5dcfc159..05fb7a22d1c 100644
--- a/src/main/runtime/orchestration/types.ts
+++ b/src/main/runtime/orchestration/types.ts
@@ -45,6 +45,8 @@ export type RunRow = {
   objective: string
   home_database: string
   coordinator_handle: string | null
+  coordinator_agent_session_id: string | null
+  coordinator_agent_session_id: string | null
   coordinator_pane_key: string | null
   consumer_generation: number
   legacy: number