diff --git a/.changeset/customer-context-slack-source.md b/.changeset/customer-context-slack-source.md
new file mode 100644
index 0000000..3dff968
--- /dev/null
+++ b/.changeset/customer-context-slack-source.md
@@ -0,0 +1,5 @@
+---
+"@outlit/tools": patch
+---
+
+Add Slack as a supported customer-context search source type.
diff --git a/packages/tools/src/contracts.ts b/packages/tools/src/contracts.ts
index 152246a..4bb6a0c 100644
--- a/packages/tools/src/contracts.ts
+++ b/packages/tools/src/contracts.ts
@@ -24,6 +24,7 @@ export const customerSourceTypes = [
   "CALENDAR_EVENT",
   "SUPPORT_TICKET",
   "OPPORTUNITY",
+  "SLACK",
 ] as const
 
 export const customerSourceTypeAliases = ["CRM", "CRM_OPPORTUNITY"] as const
@@ -34,6 +35,7 @@ export const customerSourceTypeInputs = [
   "CALENDAR_EVENT",
   "SUPPORT_TICKET",
   "OPPORTUNITY",
+  "SLACK",
   "CRM",
   "CRM_OPPORTUNITY",
 ] as const
@@ -913,7 +915,7 @@ export const workspaceUserListOrderFields = ["name", "email", "owned_customer_co
 export const schemaTables = ["activity", "customers", "users", "revenue"] as const
 
 export const customerToolContractHash =
-  "d704edcb21910caaceef9ce2046e7e27c395ba3c0e286206368c82c716bd1e5a" as const
+  "fae5d47c73e2401362019f27f85925d36d3d87485611af0753f4a3bee2b002ae" as const
 
 export type CustomerToolName = (typeof customerToolNames)[number]
 export type CustomerSourceType = (typeof customerSourceTypes)[number]
diff --git a/packages/tools/tests/client.test.ts b/packages/tools/tests/client.test.ts
index f4a715e..93c52a8 100644
--- a/packages/tools/tests/client.test.ts
+++ b/packages/tools/tests/client.test.ts
@@ -112,13 +112,14 @@ describe("tool contracts", () => {
     expect(properties.factCategories?.items?.enum).not.toContain("JOURNEY")
   })
 
-  test("exposes opportunity as the canonical CRM source type with aliases for inputs", () => {
+  test("exposes canonical source types with CRM aliases for inputs", () => {
     expect(customerSourceTypes).toEqual([
       "EMAIL",
       "CALL",
       "CALENDAR_EVENT",
       "SUPPORT_TICKET",
       "OPPORTUNITY",
+      "SLACK",
     ])
     expect(customerSourceTypeInputs).toEqual([
       "EMAIL",
@@ -126,6 +127,7 @@ describe("tool contracts", () => {
       "CALENDAR_EVENT",
       "SUPPORT_TICKET",
       "OPPORTUNITY",
+      "SLACK",
       "CRM",
       "CRM_OPPORTUNITY",
     ])
@@ -331,7 +333,24 @@ describe("resolveCustomerContextSearchInput", () => {
     })
   })
 
-  test("normalizes CRM source aliases in search input", () => {
+  test("normalizes source types and CRM aliases in search input", () => {
+    expect(
+      resolveCustomerContextSearchInput({
+        query: "renewal",
+        sourceTypes: ["slack"],
+      }),
+    ).toEqual({
+      ok: true,
+      request: {
+        query: "renewal",
+        customer: undefined,
+        topK: undefined,
+        after: undefined,
+        before: undefined,
+        sourceTypes: ["SLACK"],
+      },
+    })
+
     expect(
       resolveCustomerContextSearchInput({
         query: "renewal",
@@ -374,7 +393,7 @@ describe("resolveCustomerContextSearchInput", () => {
     ).toEqual({
       ok: false,
       message:
-        "Unknown source types: ZENDESK_TICKET. Allowed: EMAIL, CALL, CALENDAR_EVENT, SUPPORT_TICKET, OPPORTUNITY, CRM, CRM_OPPORTUNITY",
+        "Unknown source types: ZENDESK_TICKET. Allowed: EMAIL, CALL, CALENDAR_EVENT, SUPPORT_TICKET, OPPORTUNITY, SLACK, CRM, CRM_OPPORTUNITY",
     })
   })
 })