Bumping, I'll appreciate your feedback.

Shahar

On Tue, Apr 21, 2026 at 2:00 PM Shahar Epstein <[email protected]> wrote:
>
> Hey everyone,
>
> I'd like to get your feedback on a new AIP proposal:
>
> AIP-106: Composable Trigger Rules
> https://cwiki.apache.org/confluence/x/64wmGQ
>
> tl;dr
>
> This proposal introduces a composable expression model for trigger rules, 
> enabling conditions not expressible with the current enum-based system, while 
> fully preserving existing trigger rules for simple cases.
> For example, "All done, at least two succeeded" can be expressed as 
> TR.expr(done="all", success=">=2").
>
> Design Notes/Constraints:
> 1. The aggregate form is AND-only by design, to preserve determinism and keep 
> evaluation predictable.
> 2. The composable model complements (rather than replaces) the enum. Some 
> trigger rules (e.g. ALL_DONE_SETUP_SUCCESS, ONE_DONE, ALWAYS) remain 
> intentionally out of scope, and enums remain the more readable option for 
> simple cases.
>
> I'd appreciate your feedback on:
>
> Backward compatibility with existing trigger rules (see Appendix A)
>
> Semantics of eager vs complete evaluation
>
> Scope and limits of the expression model
>
> Potential edge cases and performance implications
>
> UI/observability considerations for debugging expressions
>
> Anything else
>
>
> Thank you!
>
>
> Shahar

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