diff --git a/src/internal/streaming/archive_backfill.zig b/src/internal/streaming/archive_backfill.zig
index 6b0822b..f2a84d0 100644
--- a/src/internal/streaming/archive_backfill.zig
+++ b/src/internal/streaming/archive_backfill.zig
@@ -259,6 +259,22 @@ const FetchWindow = struct {
     }
 };
 
+/// decode every block of a sealed in-memory jss segment through `handler` —
+/// the offline counterpart of `run` for a segment already on disk (local
+/// archive copies, getSegment bodies fetched out-of-band). same delivery
+/// contract; Options.host is unused. honors collections/dids/max_blocks/
+/// verify_checksums.
+pub fn replaySegment(allocator: Allocator, body: []const u8, options: Options, handler: anytype) !Result {
+    var result: Result = .{ .planned_through_seq = 0, .sealed_tip_seq = 0 };
+    try deliverSegment(allocator, body, options, .{
+        .name = "",
+        .index = 0,
+        .checksum = null,
+        .blocks = null,
+    }, handler, &result);
+    return result;
+}
+
 /// resume skip: everything at or before start_after is already delivered
 fn skippedByResume(start_after: ?Position, segment_index: u32, block_index: u32) bool {
     const sa = start_after orelse return false;