Incorporates target as part of rheo-context#150
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Adds an optional `target` field (the output-format name, e.g. "html"/"epub") to both the per-vertebra `#let rheo-context` prelude and the global `sys.inputs.rheo-context` dict. Omitted for PDF so the native `target()` fallback is preserved. No consumer changes yet.
The output format now lives solely on `sys.inputs.rheo-context.target`. The injected `target()` polyfill and the `is-rheo-*` helpers in rheo.typ read that location, and the deprecated `sys.inputs.rheo-target` key is removed. Removes the redundant `rheo-target()` helper — with the `target()` polyfill it was identical to `target()`; documents and plugins use `target()` (and the `is-rheo-*` helpers) directly.
Adds the `target` field to the rheo-context field list, notes it is absent for PDF, and documents that the output format is read via the `target()` polyfill or the `is-rheo-*` helpers now that `sys.inputs.rheo-target` is removed.
Adds a `rheo migrate` migration that rewrites direct author references to the removed `sys.inputs.rheo-target` key and `rheo-target()` helper: - `rheo-target()` -> `target()` - `"rheo-target" in sys.inputs` -> `"rheo-context" in sys.inputs and "target" in sys.inputs.rheo-context` - `sys.inputs.rheo-target` -> `sys.inputs.rheo-context.target` Applies to any project older than the current release. Honours dry-run vs --apply, reports each rewrite with file:line, and warns on residual `rheo-target` literals.
The is-rheo-epub/html/pdf() helpers lived in rheo.typ, which is injected only into the synthetic main; authored vertebrae are #include'd and never see them, so calling them errored with 'unknown variable'. The reachable output-format API is the per-file target() polyfill. Drops the dead helpers and points the docs at target().
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Moves the output format off the standalone
sys.inputs.rheo-targetkey onto atargetfield ofrheo-context, so the build context lives in one place. Follows #149.targettorheo-context— on both the per-vertebra#letprelude and the globalsys.inputs.rheo-context(rheo_context_preludes/global_context,crates/core/src/reticulate/spine.rs). Set for HTML/EPUB; absent for PDF, sotarget()keeps its native"paged".target()polyfill andbuild_inputsnow readsys.inputs.rheo-context.target; thesys.inputs.rheo-targetkey is dropped (crates/core/src/world.rs).rheo-target()helper — with the polyfill it was justtarget(). Authored files usetarget()directly.is-rheo-epub/html/pdf()helpers fromrheo.typ. They were unreachable:rheo.typis injected only into the synthetic main, and authored vertebrae are#included and never see it. Format detection istarget()(e.g.target() == "epub").Migration
rheo migraterewrites direct references in.typsources for any project older than the current release:rheo-target()→target()"rheo-target" in sys.inputs→"rheo-context" in sys.inputs and "target" in sys.inputs.rheo-contextsys.inputs.rheo-target→sys.inputs.rheo-context.targetDry run reports each rewrite with
file:line;--applywrites them and warns on any residualrheo-targetliteral it doesn't cover.Docs updated (CLAUDE.md
rheo-contextsection,FormatPluginrustdoc). The0.5.0version bump lands separately.