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JamesandClaude Opus 4.7
c1b6efd9c5
Two lint rules + render-time validation built on top of the existing
data-composition-variables schema.
Lint rules (packages/core/src/lint/rules/composition.ts):
- invalid_variable_values_json — host's data-variable-values must parse as
a JSON object. Today the runtime swallows parse failures silently and
falls back to declared defaults, masking typos.
- invalid_composition_variables_declaration — root <html>'s
data-composition-variables must parse as an array of objects with
`id` (string), `type` (one of string/number/color/boolean/enum), `label`
(string), and `default`. Per-entry findings report which fields are
missing or invalid.
Both rules read attributes via a new `readJsonAttr` helper in lint/utils.ts.
The existing `readAttr` regex `["']([^"']+)["']` truncates JSON-in-attribute
values at the first internal quote (e.g. `data-variable-values='{"x":"y"}'`
captures only `{`); `readJsonAttr` alternates double-vs-single-quoted
branches with quote-specific char classes so JSON values round-trip cleanly.
A second helper `findHtmlTag` returns the actual <html> open tag (where
data-composition-variables lives) — distinct from `findRootTag` which
returns the first in-body composition element.
Render-time validation (packages/core/src/runtime/validateVariables.ts):
- validateVariables(values, declarations) returns a structured array of
issues: undeclared keys, type mismatches, enum-out-of-range values.
Pure / sync; works in any environment.
- formatVariableValidationIssue(issue) renders a one-line user-facing
string for CLI output.
- Both exported from @hyperframes/core for studio/tooling reuse.
CLI integration (packages/cli/src/commands/render.ts):
- New --strict-variables flag. Default behavior: print warnings and
continue. With --strict-variables: print warnings then exit 1.
- New `validateVariablesAgainstProject(indexPath, values)` helper:
reads the project's index.html, runs extractCompositionMetadata to
pull the declared schema, validates the CLI's --variables payload
against it. ensureDOMParser polyfill for Node-side parsing (same
pattern as compositions.ts).
Tests:
- 11 new validateVariables unit tests covering happy path, undeclared
keys, type mismatches (string/number/boolean/color/enum), enum range,
multiple-issue aggregation, and formatter output.
- 11 new composition.test.ts cases for both lint rules: parse errors,
shape errors, per-entry validation, unknown types, missing fields,
positive cases.
- 5 new render.test.ts cases for validateVariablesAgainstProject:
no-declarations, happy path, undeclared, type-mismatch, missing-file.
- All 646 core tests + 213 cli tests still green.
Docs:
- docs/packages/cli.mdx — added --strict-variables flag row.
This is PR 3 of a 4-PR stack. PR 4 ships skill/scaffold distribution.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
