ESS releases, in practice

0.85 — Every witness reads back its effect, and the mutation audit covers grants

November 3, 2026 · 3 min read

0.85.0 adds one source format, ess/34, and moves the mutation report to ess-mutation-report/8 and the manifest to ess-mutation-manifest/7 where they list something new. A model with nothing new keeps its bytes. The changelog lists every change; this note covers each of them.

0.84 — Generated servers refuse what their OpenAPI refuses, and generated UIs call their binding's routes

November 3, 2026 · 3 min read

0.84.0 adds no source, scenario or suite format. It changes what generated servers admit, what an authored success step checks, which denied-grant scenarios synthesis writes, and how generated UIs reach a server. The changelog lists every change; this note covers each of them.

0.83 — Optional list appends, binding refusals that check event identities, and refusals that tell states apart

November 2, 2026 · 4 min read

0.83.0 adds no source, scenario or suite format, and every change in it is a fix. One is in the interpreted target, and the others are in the conformance suites synthesis writes. The changelog lists every change; this note covers each of them.

0.82 — Binding scenarios that check event identities, refusals that probe the record, and validation that names the file

November 1, 2026 · 3 min read

0.82.0 adds no source, scenario or suite format, and every change in it is a fix. Two are in the conformance suites synthesis writes, and one is in what ess specify validate cites. The changelog lists every change; this note covers each of them.

0.81 — Nullable Binary64 fields in generated types, name aliases in the schema, and synthesis that follows bindings

November 1, 2026 · 3 min read

0.81.0 adds no source, scenario or suite format, and every change in it is a fix. Two are in ess generate types, one is in the published document schema, and three are in how synthesis picks the rows a scenario is sent to. The changelog lists every change; this note covers each of them.

0.80 — HTTP-bound inputs and short names in generated types, and input-type rules in Entity Runtime

November 1, 2026 · 3 min read

0.80.0 adds no source, scenario or suite format. It changes what ess generate types writes under two flags, what Entity Runtime lowering does with a command input's type, and how synthesis decides an identity guard. The changelog lists every change; this note covers each of them.

0.79 — Nested-member claims, Binary64 in conformance suites, and typed authored inputs

November 1, 2026 · 3 min read

0.79.0 adds no source format: a specification keeps its meaning, its IR bytes and its compiled digest. It adds scenario format ess-scenario/6 and suite pair ess-conformance/62 (ordinary) and /63 (coverage). The changelog lists every change; this note covers what the new formats carry and the fixes that came with them.

0.85 — Every witness reads back its effect, and the mutation audit covers grants

0.84 — Generated servers refuse what their OpenAPI refuses, and generated UIs call their binding's routes

0.83 — Optional list appends, binding refusals that check event identities, and refusals that tell states apart

0.82 — Binding scenarios that check event identities, refusals that probe the record, and validation that names the file

0.81 — Nullable Binary64 fields in generated types, name aliases in the schema, and synthesis that follows bindings

0.80 — HTTP-bound inputs and short names in generated types, and input-type rules in Entity Runtime

0.79 — Nested-member claims, Binary64 in conformance suites, and typed authored inputs

0.78 — Structured input examples, rows a deployment provides, and lifecycle summaries

0.77 — Alike HTTP outcomes, wider OpenAPI import, and branches an earlier refusal hides

0.70 — Named rows beside a row set, state wire spellings, and replays that finish