Tracer bullet for Task 1: parse the minimal case in Java and match its intent oracle #83

Parent

#78

What to build

The first path through the whole Java seam: an authored project file in, a canonical parsed intent out, compared with the committed oracle.

• The Project Intent metamodel in hand-written Ecore, covering only what minimal uses, with names from CONTEXT.md. Genmodel Java is generated at build time.
• The Xtext grammar for the YAML subset minimal uses, importing that metamodel.
• The metamodel, syntax and cli modules. The pipeline entry takes a case and yields the canonical intent.
• The parity suite, table-driven over cases, asserting each oracle kind a case carries through the pipeline entry. Today that is one case and one kind.
• The Ecore and Xtext smoke tests from the walking skeleton are deleted.

Acceptance criteria

• The Java canonical output for minimal equals its committed intent oracle byte for byte.
• Changing one field in minimal's project file fails the parity suite.
• YAML outside the grammar's subset is refused with a diagnostic, never a guess.
• Every scaffold gate holds over the new modules.

Blocked by

• Prove the five tools run headless: the walking skeleton #81
• Fix the oracle layout and commit the minimal case's oracles #82