@@ -1,4 +1,4 @@
-import { describe, expect, test } from "bun:test"
+import { describe, expect, test } from "bun:test"
 import type {
   AgentListOutput,
   ModelDefaultOutput,
@@ -124,7 +124,7 @@ describe("normalizeProviderList", () => {
     // uses 0 as a sentinel for "unreleased" or "config-only" models. Mapping 0
     // to "1970-01-01" produces a valid DateTime in the visibility filter, which
     // then hides the model because 1970-01-01 is outside the recent 6-month
-    // window. Setting release_date to undefined instead triggers the
+    // window. Setting release_date to "" instead triggers the
     // unknown-date escape hatch in models.tsx and keeps the model visible.
     const result = normalizeProviderList(
       [{ id: "custom", name: "Custom", package: "@custom/provider" }] as ProviderListOutput["data"],
@@ -146,7 +146,7 @@ describe("normalizeProviderList", () => {
       undefined,
     )
 
-    expect(result.all.get("custom")?.models["my-model"]?.release_date).toBeUndefined()
+    expect(result.all.get("custom")?.models["my-model"]?.release_date).toBe("")
   })
 })
 
@@ -165,4 +165,4 @@ describe("directoryKey", () => {
     expect(String(directoryKey("C:/"))).toBe("C:/")
     expect(String(directoryKey("/"))).toBe("/")
   })
-})
+})
@@ -1,4 +1,4 @@
-import type {
+import type {
   AgentListOutput,
   ModelDefaultOutput,
   ModelListOutput,
@@ -131,7 +131,7 @@ export function normalizeProviderList(
       status: model.status,
       options: model.settings ?? {},
       headers: model.headers ?? {},
-      release_date: model.time.released === 0 ? undefined : new Date(model.time.released).toISOString().slice(0, 10),
+      release_date: model.time.released === 0 ? "" : new Date(model.time.released).toISOString().slice(0, 10),
       variants: Object.fromEntries(model.variants.map((variant) => [variant.id, variant.settings ?? {}])),
     }
   }
Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-import type {`
	`1`	`+import type {`
`2`	`2`	`AgentListOutput,`
`3`	`3`	`ModelDefaultOutput,`
`4`	`4`	`ModelListOutput,`
`@@ -131,7 +131,7 @@ export function normalizeProviderList(`
`131`	`131`	`status: model.status,`
`132`	`132`	`options: model.settings ?? {},`
`133`	`133`	`headers: model.headers ?? {},`
`134`		`- release_date: model.time.released === 0 ? undefined : new Date(model.time.released).toISOString().slice(0, 10),`
	`134`	`+ release_date: model.time.released === 0 ? "" : new Date(model.time.released).toISOString().slice(0, 10),`
`135`	`135`	`variants: Object.fromEntries(model.variants.map((variant) => [variant.id, variant.settings ?? {}])),`
`136`	`136`	`}`
`137`	`137`	`}`