Changes which may break some users are marked below with: ⚠️ Language As a reminder, the try experiment and the shortcircuit experiment introduced in v0.17.0 are both still ongoing. Please give the...

Changes which may break some users are marked below with: ⚠️ Language ⚠️ Pattern constraints may no longer be marked as optional or required: [string]?: int and [string]!: int are now rejected by t...

Evaluator Fix several regressions introduced in v0.17.0: a panic when evaluating some disjunctions (#4419), and spurious invalid interpolation (#4420), field not allowed (#4423), and structural cyc...

YouTube video by CUE

It's time for our next CUE Community Update. Join us on Tuesday, July 7, 2026 at 1500 UTC to hear what've been working on and what's coming next. Agenda Release updates Evaluator & performance impr...

It's time for our next CUE Community Update. Join us on Tuesday, July 7, 2026 at 1500 UTC to hear what've been working on and what's coming next. Agenda We will add the agenda in the upcoming days....

Changes which may break some users are marked below with: ⚠️ Language The active try experiment renames the new fallback keyword, used with for comprehensions, to otherwise. fallback continues to b...

Evaluator A performance optimization for the or builtin function has been reverted, as it caused a regression when its arguments included cyclic references. Fix a regression introduced since v0.16....

Changes which may break some users are marked below with: ⚠️ Evaluator Several long-standing cycle-detection bugs have been fixed, such as self-referential uses of matchN and matchIf, self-feeding ...

Changes which may break some users are marked below with: ⚠️ Language The parser now allows a newline or a comma before the closing bracket of an index expression, matching how lists and func argum...

We are excited to announce the next CUE Community Update on Thursday, May 14, 2026 at 1500 UTC. Agenda Release Updates Evaluator updates and performance improvements Encodings Central Registry cue ...

We are excited to announce the next CUE Community Update on Thursday, May 14, 2026 at 1500 UTC. Agenda The agenda will be shared closer to the date. If there is any topic you are interested in, ple...

Changes which may break some users are marked below with: ⚠️ Language The active try experiment renames the new fallback keyword, used with for comprehensions, to otherwise. fallback continues to b...

Language The fallback keyword in the aliasv2 experiment is replaced by otherwise, which is clearer. cue fmt or cue fix can be used to rewrite existing code. Evaluator Fix a regression where the com...

Changes which may break some users are marked below with: ⚠️ Language As a reminder, we have two ongoing language experiments since v0.15; a replacement for struct embedding and a rework of aliases...

CUE Labs is a configuration company. CUE is a configuration language. Our Configuration Control Plane is an end-to-end solution for everything configuration management. That raises a basic question: w...

Changes which may break some users are marked below with: ⚠️ Language As a reminder, we have two ongoing language experiments since v0.15; a replacement for struct embedding and a rework of aliases...

YouTube video by cuelang

We are excited to announce the first CUE Community Update of the year on Thursday, February 19, 2026 at 1600 UTC. Agenda CUE Hub Community Updates Release Updates Evaluator updates and performance ...

Changes which may break some users are marked below with: ⚠️ Language As a reminder, we have two ongoing language experiments since v0.15; a replacement for struct embedding and a rework of aliases...

We are excited to announce the first CUE Community Update of the year on Thursday, February 19, 2026 at 1600 UTC. Agenda CUE Hub Community Updates Release Updates Evaluator updates and performance ...

Changes which may break some users are marked below with: ⚠️ Language As a reminder, we have two ongoing language experiments since v0.15; a replacement for struct embedding and a rework of aliases...

Evaluator Fix a panic which could occur when using the error built-in with cyclic references. Fix a panic which could occur when loading @experiment(aliasv2) syntax with an invalid alias name. cmd/...

Evaluator Fix a panic which could occur when using Expr after LookupPath on a cue.Value. cmd/cue Fix a panic which could occur when using cue cmd tasks referencing definitions. Fix a panic which co...

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We are excited to announce our next CUE Community Update, on Tuesday, December 02, 2025 at 1600 UTC. Agenda CUE Labs launch and the Configuration Control Plane Release Updates Evaluator updates, in...

YouTube video by cuelang

We are excited to announce our next CUE Community Update, on Tuesday, December 02, 2025 at 1600 UTC. Agenda updated in the upcoming days. If there is any topic you are interested in, please let us ...

Evaluator Fix an evalv3 regression first introduced in v0.11.0 where the and built-in function started evaluating its arguments too eagerly, causing failures in cue def. Fix an evalv3 regression wh...

We are excited to announce our next CUE community event, on Tuesday November 18, 2025 at 1600 UTC. Agenda This session is a technical deep dive focused on the CUE developer workflow. The main event...

We are excited to announce our next CUE community event, on Tuesday November 18, 2025 at 1600 UTC. Agenda This session is a technical deep dive focused on the CUE developer workflow. The main event...

YouTube video by cuelang

Changes which may break some users are marked below with: ⚠️ Note that this release no longer includes a checksums.txt asset; GitHub now provide digests natively. LSP This release includes the init...

Configuration chaos is a multi-billion-dollar blind spot. But imagine a world where configuration isn't a source of fear, but a source of reliability. A world…

Imagine a world where you can answer, with absolute confidence, the critical question: “What is the full impact of this change?” A world where configuration isn’t a source of fear, but a source of rel...

Changes which may break some users are marked below with: ⚠️ Note that this release no longer includes a checksums.txt asset; GitHub now provide digests natively. cmd/cue cue mod resolve gains a --...

Changes which may break some users are marked below with: ⚠️ Evaluator aliasv2 experiment ⚠️ The self experiment introduced in v0.15.0-alpha.2 has been renamed to aliasv2, to fully implement the Po...

Evaluator Fix an unintended evalv2 regression in v0.14.1; the change only intended to affect evalv3. Fix a panic in the parser which could occur when @experiment() file attributes are invalid. Fix ...

Changes which may break some users are marked below with: ⚠️ Evaluator self experiment The self experiment enables a new "self" predeclared identifier, which refers to the innermost surrounding str...

YouTube video by cuelang