feat(a2ui): client-side functions (Phase 2 of the v0.9 migration) - #818
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Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
formatString/formatNumber/formatCurrency/formatDate/pluralize/and/or/not resolve through createA2uiFunctionRegistry(); functionCall actions route to a2ui:localAction (openUrl opens with noopener). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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This was referenced Aug 17, 2026
feat(a2ui): live sendDataModel round-trip + capabilities helper (Phase 4 of the v0.9 migration)
#820
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Summary
Phase 2 of the A2UI v0.9.1 migration (follows #817): client-side function execution per the official basic-catalog function schemas.
@threadplane/a2ui: newcreateA2uiFunctionRegistry()with the standard set —formatString(full${...}interpolation: absolute/relative JSON-pointer paths, nested named-arg calls like${formatDate(value:${/d}, format:'yyyy-MM-dd')},\${escape; single-pass scanner, no backtracking regexes),formatNumber,formatCurrency,formatDate(TR35 pattern subset),pluralize(Intl.PluralRules),and/or/not.resolveDynamicgains an optional registry parameter; function args resolve recursively (bindings and nested calls); unknown names resolve toundefinedwith a one-time warning. Registry is extensible via overrides.@threadplane/chat:surfaceToSpecresolves every dynamic value through the standard registry, andaction.functionCallnow wires to the existinga2ui:localActionhandler (consumer handlers take priority; built-inopenUrlopens a new tab withnoopener).Additive and non-breaking. Plan:
docs/superpowers/plans/2026-08-17-a2ui-v09-phase2-functions.md.Verification
libs/a2ui86 unit tests (26 new for functions),libs/chat1128 — green; both libs build + lint cleannx affected -t lint test build: green except the pre-existingcockpit-telemetry:lintworktree-environment failure (untouched project, posthog-js specifier vs local install)formatCurrency+formatString; the surface rendered$1,234.50andThanks, Ada!— both values computed client-side by the registry from the LLM's{call}emissions.🤖 Generated with Claude Code