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docs(skills): the automation skill's CEL table is the bare-callable public subset #15524

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os-zhuang merged 1 commit into from
Sep 5, 2026
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docs(skills): the automation skill's CEL table is the bare-callable public subset #15524

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6 changes: 4 additions & 2 deletions skills/objectstack-automation/SKILL.md
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Expand Up @@ -348,10 +348,12 @@ them right the first time:
} });
```

4. **Conditions are bare CEL — only the stdlib is callable.** `now()`,
4. **Conditions are bare CEL — the stdlib is what you may call bare.** `now()`,
`today()`, `daysFromNow(n)`, `daysAgo(n)`, `daysBetween(a, b)`, `isBlank(v)`,
`coalesce(a, b)`, `abs/round/min/max`, `upper/lower/contains/matches`, plus CEL
built-ins (`has`, `size`, `int`, `string`, …) — see **objectstack-formula** for the full table.
built-ins (`has`, `size`, `int`, `string`, …) — see **objectstack-formula** for that
table: it is `CEL_STDLIB_FUNCTIONS`, the bare-callable public subset, so receiver
methods (called on a value, never bare) are not in it.
An UNKNOWN function (`PRIOR()`, a typo'd name) and a `{…}`-wrapped field ref
both **fail the build**: a brace is a template, not CEL — write `record.x`,
not `{record.x}`.
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