grapheme

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02 · Language core

02: Language Core

Goal: understand the primitives that make workflows readable and composable.

Concepts to Learn

  1. Executables (query, mutation, iterator, glyph)
  2. Parameters (0.7.0): $param lists, defaults, --args-json
  3. Tags / using (0.7.0): ambient bindings scoped to a block
  4. State shaping with set, pick, map, get_path
  5. Control-flow with if, match, return
  6. Lifecycle transitions with transition

Recommended examples

grapheme run examples/hello-world.gr --json
grapheme run examples/params-call-bind.gr --args-json '{"label":"grapheme"}' --json
grapheme run examples/tag-using-scope.gr --json
grapheme run examples/core-merge.gr --json
grapheme run examples/core-filter.gr --json
grapheme run examples/mutation-state-machine-apply.gr --json

Author extract: docs/internal/language/params-and-tags-v1.md.

Exercise

Take one example and:

  1. add one state field or one executable parameter,
  2. route one new branch or one scoped using block,
  3. keep output contract readable.

If teammates can review your flow quickly, you are using Grapheme correctly.