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7ecbda6b4e
Second commit of the chassis v1 branch. Lands the type-level shape
of soft/hard drops without wiring them up. Variants are reachable
from emitters but the planner doesn't produce them yet; the apply
path returns an explicit not-yet-implemented error if one shows up
via deserialization.
Added:
- `DropMode { Soft, Hard }` — orthogonal to `SafetyTier`. Tier
classifies the rule's risk class; mode is the operator's intent
for data treatment.
- `Soft` → catalog tombstone, data retained. Tier: safe.
- `Hard` → Lance-level removal. Tier: destructive; will require
--allow-data-loss to apply (commit 7).
- `SchemaMigrationStep::DropType { type_kind, name, mode }` and
`SchemaMigrationStep::DropProperty { type_kind, type_name,
property_name, mode }` variants.
- Re-export `DropMode` from `omnigraph_compiler::DropMode` so
downstream crates don't reach into the catalog submodule.
- CLI `render_schema_plan_step` arms for both variants, surfacing
the mode in plan output: `drop property 'Person.age' of node
'Person' (soft mode)`.
- `apply_schema_with_lock` exhaustive match arm for the two new
variants that returns `manifest_internal` with a clear
not-yet-implemented message. If a SchemaIR JSON containing
Drop{Type,Property} arrives (e.g. from a future tool or hand-
written), the apply path fails explicitly rather than silently
misclassifying.
- Two new in-source tests:
- `drop_steps_round_trip_through_serde` — pins the wire shape
for all four (variant × mode) combinations.
- `drop_mode_serde_uses_snake_case` — pins external-tool-
friendly serialization (`"soft"` / `"hard"`).
Build: clean, only pre-existing warnings.
Tests:
- omnigraph-compiler schema_plan: 6/6 (4 existing + 2 new).
- omnigraph-engine schema_apply: 11/11 (unchanged — planner still
emits UnsupportedChange for removal paths).
Next commit (commit 3 per docs/schema-lint-v1-plan.md): add the
`tombstoned: bool` fields to NodeIR / EdgeIR / PropertyIR for the
catalog representation of soft-mode tombstones.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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