v1.21.4

1.21.4 (2026-09-02)

Added

• apply Function URL CORS configuration (#1241) (0e4330b), closes #1217
• capture Lambda output without printing it (#1246) (7ef4026)
• create and execute CloudFormation change sets (#1234) (db58ad0), closes #1221
• expand SAM Auth and Cognito events (#1244) (66217d5), closes #1226
• expand what a served S3 request can say (#1248) (ef2c883), closes #1231
• fail a query the Athena engine turns down (#1261) (b41a144), closes #1254
• fill three CFN template language gaps (#1238) (f2bcd39), closes #1225
• give a simulated Stack its own stack ID (#1240) (7cc87bc), closes #1224
• honor stream mapping retry limits (#1243) (d02e258), closes #1219
• keep a resource through replace or delete (#1247) (6c02464), closes #1223
• project simulated Query and Scan reads (#1259) (45e4252), closes #1258
• put Lambda timers on the simulated clock (#1251) (a0c2477), closes #1218
• raise S3 events a deployment causes (#1242) (7f06b95), closes #1232
• read Parquet objects in the Athena query engine (#1260) (7378dab), closes #1253
• roll back a failed CloudFormation update (#1257) (30bae10), closes #1222
• route bundled Lambda S3 calls to sim S3 (#1239) (f8e928c), closes #1227
• serve S3 user metadata as headers (#1255) (626af63), closes #1249
• simulate S3 Object tagging (#1250) (2428d41), closes #1230
• simulate S3 storage classes (#1237) (b0ce870), closes #1229

Fixed

• cloudfront: translate local viewer origins (#1235) (33f65fa)
• cognito: pre-fill mapped claims by schema type (#1236) (b522ca4)
• lambda: authorize destinations with execution role (#1220) (4d281cb)
• refuse a missing key without s3:ListBucket (#1256) (0b55868), closes #1252

Packaging and dependencies

• deps-dev: bump the npm-patch-and-minor group across 1 directory with 40 updates (#1245) (d21fe73)