ESS releases

ESS 0.23.0

Fri, 11 Sep 2026 14:14:26 GMT

ESS released version 0.23.0.

ESS 0.22.2

Thu, 10 Sep 2026 20:11:55 GMT

ESS released version 0.22.2.

ESS 0.22.1

Thu, 10 Sep 2026 18:55:54 GMT

ESS released version 0.22.1.

ESS 0.22.0

Thu, 10 Sep 2026 12:27:04 GMT

ESS released version 0.22.0.

ESS 0.20.0

Sun, 06 Sep 2026 16:07:45 GMT

ESS released version 0.20.0.

Checked schema imports and structural data realizations

Sat, 05 Sep 2026 21:00:00 GMT

Import complete JSON Schema roots with source identity; generate structural Go, Rust and TypeScript libraries; and run source-pinned normalization recipes. Rust normalization has a library API; Go/TypeScript support is pending. Rust/Web synthesis returns checked failures, and sliced provenance names its digest profile.

ESS 0.17.0

Fri, 04 Sep 2026 14:13:15 GMT

ESS released version 0.17.0.

An authored scenario can claim that a consumer halted an ordered scan

Fri, 04 Sep 2026 14:08:16 GMT

`halts_after: ` lets an authored scenario require a consumer to stop an ordered scan after n rows. The target reports rows produced and whether the consumer ended the read. Targets without incremental reads report `unsupported`. This adds a claim to `ess-conformance/4`.

A specification's scenarios can be played in a browser

Fri, 04 Sep 2026 14:08:16 GMT

`ess verify conform web` emits a browser page that walks authored scenarios, showing actors, state, selected views, and declared consequences. It replays model-determined behavior without executing an implementation, so authors can inspect a specification before filling its obligations.

A specification carries the scenarios an author wrote, not only the ones it obliges

Fri, 04 Sep 2026 13:13:51 GMT

Authors can declare modelled instances, command timelines, and expectations in `ess-scenario/1`. These scenarios compile into `ess-conformance/2` with identities distinct from synthesized suites. Twenty-seven refusals check their names against the model. Included in the published 0.16.0 release.

An authored scenario can claim a length of time, and a target has to answer for it

Fri, 04 Sep 2026 13:13:51 GMT

Authored scenarios gain `mark:` and `elapsed:` with `not_before`, `within`, and `quiet` bounds. The suite states a duration and its anchor; the target reports an observed or advanced clock. Targets without clock support report `unsupported`. The claims use `ess-conformance/3`.

A component can declare a command-line surface, and ESS synthesizes its parser

Fri, 04 Sep 2026 10:01:53 GMT

`reached_by: command_line` and a `cli:` block state that a component's callers are people at a terminal and where each command sits in the tree. `ess generate synthesize --target clap` emits the parser, the handler obligations and the completion scripts from that declaration.

ESS 0.13.5

Fri, 04 Sep 2026 05:00:06 GMT

ESS released version 0.13.5.

ESS 0.13.4

Fri, 04 Sep 2026 03:30:03 GMT

ESS released version 0.13.4.

ESS 0.13.3

Fri, 04 Sep 2026 03:14:50 GMT

ESS released version 0.13.3.

ESS 0.13.2

Fri, 04 Sep 2026 02:33:48 GMT

ESS released version 0.13.2.

ESS 0.13.1

Fri, 04 Sep 2026 01:56:41 GMT

ESS released version 0.13.1.

ESS 0.13.0

Fri, 04 Sep 2026 01:38:38 GMT

ESS released version 0.13.0.

ESS 0.12.0

Fri, 04 Sep 2026 01:32:32 GMT

ESS released version 0.12.0.

ESS 0.11.1

Thu, 03 Sep 2026 23:38:32 GMT

ESS released version 0.11.1.

ESS 0.11.0

Thu, 03 Sep 2026 20:11:17 GMT

ESS released version 0.11.0.

ESS 0.10.0

Thu, 03 Sep 2026 17:31:20 GMT

ESS released version 0.10.0.

ESS 0.9.2

Thu, 03 Sep 2026 10:35:03 GMT

ESS released version 0.9.2.

ESS 0.9.1

Thu, 03 Sep 2026 10:04:10 GMT

ESS released version 0.9.1.

ESS 0.9.0

Thu, 03 Sep 2026 10:02:38 GMT

ESS released version 0.9.0.

ESS 0.8.0

Thu, 03 Sep 2026 09:39:37 GMT

ESS released version 0.8.0.

ESS 0.7.0

Thu, 03 Sep 2026 02:11:09 GMT

ESS released version 0.7.0.

ESS 0.6.0

Thu, 03 Sep 2026 01:27:53 GMT

ESS released version 0.6.0.

ESS 0.5.1

Wed, 02 Sep 2026 23:22:48 GMT

ESS released version 0.5.1.

ESS 0.4.0

Wed, 02 Sep 2026 21:00:22 GMT

ESS released version 0.4.0.

ESS 0.2.1

Tue, 01 Sep 2026 10:15:58 GMT

ESS released version 0.2.1.

ESS 0.2.0

Tue, 01 Sep 2026 09:08:49 GMT

ESS released version 0.2.0.

ESS 0.1.1

Tue, 01 Sep 2026 02:57:49 GMT

ESS released version 0.1.1.

ESS becomes a standalone executable specification toolchain

Tue, 01 Sep 2026 02:32:47 GMT

ESS 0.1.0 extracts system modeling, schema contracts, generators, and conformance into an independent repository with no AEP dependency.