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Schema Change Notes

Scope

This note covers schema changes made during the second content stabilization pass.

Changed Schemas

`schemas/source_article.schema.json`

Change:

Formalized source_type enum:
- original_article
- synthesis_note
- placeholder
Formalized source_status enum:
- representative
- derived_synthesis
- placeholder

Reason:

Current data already used synthesis_note and derived_synthesis.
The schema now matches implementation data instead of leaving enum drift implicit.

`schemas/source_excerpt.schema.json`

Change:

Added required quote_status.
Added required source_location.
Formalized quote_status enum:
- exact
- condensed
- paraphrased
Formalized excerpt_type enum:
- definition
- taxonomy
- mechanism
- application_rule
- value_claim
- boundary_rule
- validation_rule

Reason:

Distinguishes exact quotes from compressed or paraphrased evidence.
Prevents raw_excerpt from silently containing condensed text.

`schemas/regression_case.schema.json`

Change:

Expanded case_type enum:
- positive
- boundary
- misuse
- no_call
- selector_gate
- pipeline
Added optional evaluable fields:
- should_call_model
- expected_primary_model
- negative_expected_models
- expected_classification
- expected_dominant_scarcity
- expected_max_depth
- minimum_required_elements
- forbidden_elements
- evaluation_mode

Reason:

Supports no-call, false-positive, selector-gate, and structured review cases without adding LLM evaluation.

Not Changed

`schemas/model_card.schema.json`

No new required model-card fields were added in this pass.

Reason:

QPI and Intellectual Archaeology output contracts were strengthened in model JSON and cards.
Making those fields schema-required is left for CCRA / Owner review to avoid over-weighting v0.2.

`schemas/model_index.schema.json`

No additional index semantics were added in this pass.

Reason:

Index continues to mirror model/card state and counts.
Content review status remains in reports/model_review_status.json, not model_index.json.