Raw release notes:
```
## What's Changed
* Automatic toolchain upgrade to nightly-2025-08-07 by @github-actions[bot] in #4278
* Add loop invariant support for `while let` loop  by @thanhnguyen-aws in #4279
* Automatic toolchain upgrade to nightly-2025-08-08 by @github-actions[bot] in #4281
* Automatic toolchain upgrade to nightly-2025-08-09 by @github-actions[bot] in #4283
* Automatic cargo update to 2025-08-11 by @github-actions[bot] in #4285
* Bump tests/perf/s2n-quic from `8f510f0` to `c64faf9` by @dependabot[bot] in #4288
* Bump actions/checkout from 4 to 5 by @dependabot[bot] in #4286
* Bump actions/download-artifact from 4 to 5 by @dependabot[bot] in #4287
* Upgrade toolchain to 2025-08-10 by @carolynzech in #4289
* Automatic toolchain upgrade to nightly-2025-08-11 by @github-actions[bot] in #4290
* Automatic toolchain upgrade to nightly-2025-08-12 by @github-actions[bot] in #4292
* Update README by @carolynzech in #4291
* Automatic toolchain upgrade to nightly-2025-08-13 by @github-actions[bot] in #4297
* [Breaking Change] Fail if stub verified doesn't have a contract harness by @carolynzech in #4295
* Kani Book Documentation Improvements by @carolynzech in #4296
* Automatic toolchain upgrade to nightly-2025-08-14 by @github-actions[bot] in #4298
* Automatic toolchain upgrade to nightly-2025-08-15 by @github-actions[bot] in #4299
* Automatic toolchain upgrade to nightly-2025-08-16 by @github-actions[bot] in #4300
* Automatic cargo update to 2025-08-18 by @github-actions[bot] in #4302
* Upgrade Rust toolchain to 2025-08-18 by @tautschnig in #4304
* Automatic toolchain upgrade to nightly-2025-08-19 by @github-actions[bot] in #4307
* Bump tests/perf/s2n-quic from `c64faf9` to `ff81604` by @dependabot[bot] in #4306
* Automatic toolchain upgrade to nightly-2025-08-20 by @github-actions[bot] in #4309
* Share body cache between harnesses within a codegen unit by @AlexanderPortland in #4276
* Add loop-contracts support for `for` loop by @thanhnguyen-aws in #4143
* RFC: Partitioned proofs by @AlexanderPortland in #4228
* Update toolchain to 08-25-2025 by @thanhnguyen-aws in #4316
* Automatic cargo update to 2025-08-25 by @github-actions[bot] in #4315
* Automatic toolchain upgrade to nightly-2025-08-26 by @github-actions[bot] in #4317
* Bump tests/perf/s2n-quic from `ff81604` to `fa30e8a` by @dependabot[bot] in #4318
* Automatic toolchain upgrade to nightly-2025-08-27 by @github-actions[bot] in #4319
* Handle const generics in stubbing code by @zhassan-aws in #4323
* Automatic toolchain upgrade to nightly-2025-08-28 by @github-actions[bot] in #4324
* Automatic toolchain upgrade to nightly-2025-08-29 by @github-actions[bot] in #4325
* Add import select_autoescape by @zhassan-aws in #4327
* Bump tracing-subscriber from 0.3.19 to 0.3.20 by @dependabot[bot] in #4328
* Bump ncipollo/release-action from 1.18.0 to 1.19.1 by @dependabot[bot] in #4331
* Bump tests/perf/s2n-quic from `fa30e8a` to `d2c0794` by @dependabot[bot] in #4332
* Automatic cargo update to 2025-09-01 by @github-actions[bot] in #4330
* Upgrade toolchain to 2025-09-02 by @zhassan-aws in #4333
* Automatic toolchain upgrade to nightly-2025-09-03 by @github-actions[bot] in #4335
* Automatic toolchain upgrade to nightly-2025-09-04 by @github-actions[bot] in #4336
* Automatic toolchain upgrade to nightly-2025-09-05 by @github-actions[bot] in #4337
* Replace fxhash with rustc-hash by @zhassan-aws in #4341
* Fix LLBC regressions by @zhassan-aws in #4338
* Bump ncipollo/release-action from 1.19.1 to 1.20.0 by @dependabot[bot] in #4344
* Automatic cargo update to 2025-09-08 by @github-actions[bot] in #4342
* Bump tests/perf/s2n-quic from `d2c0794` to `26e2402` by @dependabot[bot] in #4346
* Automatic toolchain upgrade to nightly-2025-09-06 by @github-actions[bot] in #4339
* Combo of small performance changes by @AlexanderPortland in #4314
* Upgrade cargo_metadata dependency by @tautschnig in #4308
* Bump actions/github-script from 7 to 8 by @dependabot[bot] in #4343
* Bump actions/labeler from 5 to 6 by @dependabot[bot] in #4345
* Automatic toolchain upgrade to nightly-2025-09-07 by @github-actions[bot] in #4347
* Workaround sporadic git submodule failure by @tautschnig in #4349
* Implement BoundedArbitrary for boxed slices by @zhassan-aws in #4340
* Automatic toolchain upgrade to nightly-2025-09-08 by @github-actions[bot] in #4350
* Contain CI permissions to avoid global read-write by @tautschnig in #4348
* Automatic toolchain upgrade to nightly-2025-09-09 by @github-actions[bot] in #4352
* Upgrade Rust toolchain to 2025-09-10 by @tautschnig in #4354
* Automatic toolchain upgrade to nightly-2025-09-11 by @github-actions[bot] in #4355
* Automatic toolchain upgrade to nightly-2025-09-12 by @github-actions[bot] in #4356
* Do not run PR/issue-creating workflows in forks by @tautschnig in #4357
* Automatic toolchain upgrade to nightly-2025-09-13 by @github-actions[bot] in #4358
* Automatic toolchain upgrade to nightly-2025-09-14 by @github-actions[bot] in #4359
* Automatic toolchain upgrade to nightly-2025-09-15 by @github-actions[bot] in #4360
* Automatic cargo update to 2025-09-15 by @github-actions[bot] in #4361
* Bump tests/perf/s2n-quic from `26e2402` to `fc9b388` by @dependabot[bot] in #4362
* Automatic toolchain upgrade to nightly-2025-09-16 by @github-actions[bot] in #4363
* Automatic toolchain upgrade to nightly-2025-09-17 by @github-actions[bot] in #4364
* Upgrade Rust toolchain to 2025-09-18 by @tautschnig in #4366
* Autoharness: use SHA-1 to produce codegen unit file names by @tautschnig in #4370
* Upgrade Rust toolchain to 2025-09-19 by @tautschnig in #4369
* Automatic toolchain upgrade to nightly-2025-09-20 by @github-actions[bot] in #4371
* Automatic toolchain upgrade to nightly-2025-09-21 by @github-actions[bot] in #4372
* Update attributes.md by @0xsecaas in #4376
* Bump tests/perf/s2n-quic from `fc9b388` to `b131854` by @dependabot[bot] in #4377
* Automatic toolchain upgrade to nightly-2025-09-22 by @github-actions[bot] in #4373
* Automatic cargo update to 2025-09-22 by @github-actions[bot] in #4374
* Revert "Cache dependencies for CI jobs (#4181)" by @tautschnig in #4375
* Automatic toolchain upgrade to nightly-2025-09-23 by @github-actions[bot] in #4378
* Automatic toolchain upgrade to nightly-2025-09-24 by @github-actions[bot] in #4379
* Automatic toolchain upgrade to nightly-2025-09-25 by @github-actions[bot] in #4380
* Automatic toolchain upgrade to nightly-2025-09-26 by @github-actions[bot] in #4381
* Automatic toolchain upgrade to nightly-2025-09-27 by @github-actions[bot] in #4382
* Automatic toolchain upgrade to nightly-2025-09-28 by @github-actions[bot] in #4383
* Automatic toolchain upgrade to nightly-2025-09-29 by @github-actions[bot] in #4384
* Automatic cargo update to 2025-09-29 by @github-actions[bot] in #4385
* Bump tests/perf/s2n-quic from `b131854` to `1cca93b` by @dependabot[bot] in #4386
* Upgrade Rust toolchain to 2025-09-30 by @tautschnig in #4388
* Automatic toolchain upgrade to nightly-2025-10-01 by @github-actions[bot] in #4389
* Automatic toolchain upgrade to nightly-2025-10-02 by @github-actions[bot] in #4391
* Upgrade Rust toolchain to 2025-10-03 by @tautschnig in #4393
* Complete CI permissions limiting by @tautschnig in #4394
* Automatic toolchain upgrade to nightly-2025-10-04 by @github-actions[bot] in #4395
* Automatic toolchain upgrade to nightly-2025-10-05 by @github-actions[bot] in #4396
* Automatic cargo update to 2025-10-06 by @github-actions[bot] in #4398
* Automatic toolchain upgrade to nightly-2025-10-06 by @github-actions[bot] in #4397
* Automatic toolchain upgrade to nightly-2025-10-07 by @github-actions[bot] in #4401
* Automatic toolchain upgrade to nightly-2025-10-08 by @github-actions[bot] in #4402
* Automatic toolchain upgrade to nightly-2025-10-09 by @github-actions[bot] in #4403
* Automatic toolchain upgrade to nightly-2025-10-10 by @github-actions[bot] in #4404
* Automatic toolchain upgrade to nightly-2025-10-11 by @github-actions[bot] in #4405
* Bump tests/perf/s2n-quic from `1cca93b` to `995f37b` by @dependabot[bot] in #4400
* Automatic cargo update to 2025-10-13 by @github-actions[bot] in #4409
* Upgrade Rust toolchain to 2025-10-12 by @tautschnig in #4407
* Bump tests/perf/s2n-quic from `995f37b` to `5240fd6` by @dependabot[bot] in #4410
* Automatic toolchain upgrade to nightly-2025-10-13 by @github-actions[bot] in #4411
* Automatic toolchain upgrade to nightly-2025-10-14 by @github-actions[bot] in #4412
* Automatic toolchain upgrade to nightly-2025-10-15 by @github-actions[bot] in #4414
* Automatic toolchain upgrade to nightly-2025-10-16 by @github-actions[bot] in #4415
* Automatic toolchain upgrade to nightly-2025-10-17 by @github-actions[bot] in #4416
* Automatic cargo update to 2025-10-20 by @github-actions[bot] in #4417
* Automatic toolchain upgrade to nightly-2025-10-18 by @github-actions[bot] in #4418
* Bump tests/perf/s2n-quic from `5240fd6` to `73c9278` by @dependabot[bot] in #4419
* Automatic toolchain upgrade to nightly-2025-10-19 by @github-actions[bot] in #4420
* Automatic toolchain upgrade to nightly-2025-10-20 by @github-actions[bot] in #4421
* Automatic toolchain upgrade to nightly-2025-10-21 by @github-actions[bot] in #4422
* Automatic toolchain upgrade to nightly-2025-10-22 by @github-actions[bot] in #4423
* Automatic toolchain upgrade to nightly-2025-10-23 by @github-actions[bot] in #4424
* Automatic cargo update to 2025-10-27 by @github-actions[bot] in #4428
* Bump tests/perf/s2n-quic from `73c9278` to `42fe409` by @dependabot[bot] in #4429
* Bump actions/download-artifact from 5 to 6 by @dependabot[bot] in #4430
* Upgrade Rust toolchain to 2025-10-24 by @tautschnig in #4426
* Automatic toolchain upgrade to nightly-2025-10-25 by @github-actions[bot] in #4431
* Automatic toolchain upgrade to nightly-2025-10-26 by @github-actions[bot] in #4432
* Automatic toolchain upgrade to nightly-2025-10-27 by @github-actions[bot] in #4433
* Automatic toolchain upgrade to nightly-2025-10-28 by @github-actions[bot] in #4434
* Automatic toolchain upgrade to nightly-2025-10-29 by @github-actions[bot] in #4435
* Automatic toolchain upgrade to nightly-2025-10-30 by @github-actions[bot] in #4436
* Automatic toolchain upgrade to nightly-2025-10-31 by @github-actions[bot] in #4437
* Automatic cargo update to 2025-11-03 by @github-actions[bot] in #4441
* Upgrade Rust toolchain to 2025-11-03 by @tautschnig in #4440
* Bump tests/perf/s2n-quic from `42fe409` to `e726f08` by @dependabot[bot] in #4443
* Switch macos-13 CI jobs to macos-15-intel by @tautschnig in #4442
* Automatic toolchain upgrade to nightly-2025-11-04 by @github-actions[bot] in #4444
* Incrementally update charon submodule with LLBC backend adaptations by @tautschnig in #4445
* Automatic toolchain upgrade to nightly-2025-11-05 by @github-actions[bot] in #4446
* Major-version update cargo dependencies by @tautschnig in #4447

## New Contributors
* @0xsecaas made their first contribution in #4376

**Full Changelog**: kani-0.65.0...kani-0.66.0
```


By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 and MIT licenses.