YAML functions require explicit tags
· 2 min read
Starting with the 2026-10-20 edition, Atmos evaluates YAML functions only when they are written as explicit YAML tags. Quoting an entire function expression keeps it as literal text.
Previously, Atmos stored deferred function calls as plain strings to evaluate them after merging and template rendering, which erased the distinction between a real YAML tag and quoted text. That was a bug.
