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JamesandClaude Fable 5
2e0b884521
Fourth PR of the template-variables Studio stack — the HTTP plumbing.
- preview routes (/preview and /preview/comp/*) accept
?variables=<url-encoded json> and inject
`window.__hfVariables = {...}` into <head>, before the runtime and any
composition script — the exact global the engine sets via
evaluateOnNewDocument at render time, so preview-with-values cannot
diverge from render output. Values are escaped against </script>
breakout, malformed payloads 400 instead of silently previewing
defaults, and the ETag is salted with a hash of the payload so cached
previews revalidate when values change.
- POST /projects/:id/render accepts variables ({variableId: value}) and
forwards them through StudioApiAdapter.startRender into the producer's
RenderConfig.variables — the same channel `hyperframes render
--variables` uses. Wired in both adapters (CLI embedded server + vite
dev adapter).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>