Replace the tag/threshold/key/expr CSV body with YAML `vars:` and
`tags:` maps. `parseDeclare` validates the body with an exported Zod
schema and returns the same declaration and modifier shapes the
reactivity engine already consumes.
The breaking rename from `parseDeclareCsv` updates the registry, the
journal re-exports, and the `tttk check` role checks, where R003 now
reports schema errors with their path and R004 warns when a block
declares nothing.
Replace the old stat-parser logic with a new declare-parser to handle
variable declarations and tag modifiers. This includes moving the
declare-parser logic to a shared location in cli/completions to avoid
duplication between the CLI and the journal component.
Add support for `role=declare` blocks in markdown to allow for
dynamic variable declarations and tag-based modifiers.
- Implement `declare-parser` to parse CSV-formatted declaration blocks.
- Implement `var-reactivity` to manage dependency graphs, topological
sorting, and cascading updates when variables change.
- Implement `variable-expression` to evaluate arithmetic, dice rolls,
and math functions within expressions.
hyper
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