[witbrock]

What changed

• Bound KR relationship endpoint resolution to exact concept_exists / narrow fetch_concept reads and removed broad lexical-search fallback from that resolver.
• Added deterministic, slot-owned description-evidence requirements to the generic KR materialisation guard, including exact-once, wrong-slot, duplicate, and overlap rejection before writes.
• Compiled spreadsheet row evidence into the owning artefact slot rather than relying on model placement.
• Added digest-gated, non-forced migration for the two changed represented prompts, KR seed 7 to 8, and spreadsheet authority seed 20 to 21.
• Regenerated the dependent spreadsheet authority fingerprint and added focused migration, idempotency, and provenance-placement coverage.

Why

The exact-worker replay completed all concept and relationship writes but exposed two acceptance defects: a resolver existence check expanded incoming relationships and timed out after scanning Atlas, and the model placed all field-level evidence on the immutable record version instead of each owning typed artefact. The completion checker correctly refused to write a processing marker. This change removes the wasteful affordance and makes evidence ownership a deterministic pre-write contract while preserving model-driven planning.

Validation

• 100 relevant tests passed.
• Independent focused review: 75/75 passed before the final strengthened row-identity assertion.
• Workflow purity: 23/23 passed.
• Ruff and git diff --check passed.
• Spreadsheet generated bundle matches its generator exactly.
• KR seed validate-all passed (local Mongo availability warning only).

Live authority publication and exact-worker replay will follow this merge so the evidence remains bound to the merged commit.

[Copilot]

Pull request overview

This PR tightens KR materialisation authority and evidence handling by (1) bounding relationship endpoint resolution to exact, low-cost reads and (2) making description-evidence ownership a deterministic, guard-enforced contract (with seed/versioned migrations and accompanying tests) so spreadsheet-row evidence is attached to the correct owning artefact slots before writes.

Changes:

• Updated the KR workflow seed + prompt assets to use bounded concept_exists / narrow fetch_concept for endpoint resolution and to forbid lexical-search fallback.
• Extended KR/spreadsheet materialisation guards to require slot-owned required_description_fragments and added tests for exact-once, wrong-slot, duplicate, and overlap rejection.
• Added digest-gated, non-forced prompt migration and bumped KR seed (7→8) and spreadsheet authority seed (20→21) with regenerated fingerprints and coverage.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/backend/test_spreadsheet_record_ingestion_service.py	Adds coverage ensuring spreadsheet row evidence statements are compiled into the correct artefact slot fragments.
tests/backend/test_spreadsheet_programme_workflow_vontology_service.py	Updates seed-version assertions and validates legacy authority digest mapping for the spreadsheet programme seed.
tests/backend/test_spreadsheet_cross_record_entity_identity.py	Updates synthetic fixtures to include guard-required description fragments in generated descriptions.
tests/backend/test_kr_materialisation_workflow_vontology_service.py	Adds/updates tests for seed v8 policies, bounded endpoint resolution, and digest-gated prompt migration behaviour.
tests/backend/test_kr_materialisation_guard_service.py	Adds focused tests for required-description-fragment ownership validation and overlap/duplication rejection.
src/backend/workflows/repo_seed_bundles/spreadsheet_programme_representation_workflow_seed_bundle.json	Bumps seed to v21, updates KR dependency to seed v8, and records reviewed legacy authority digests + new fingerprint.
src/backend/workflows/repo_seed_bundles/prompt_kr_relationship_endpoint_resolution_seed.md	Tightens resolver instructions to exact-ID bounded checks and blocks lexical-search fallback.
src/backend/workflows/repo_seed_bundles/prompt_kr_design_materialisation_plan_seed.md	Requires verbatim, exact-once placement of required_description_fragments into the owning slot’s description_text.
src/backend/workflows/repo_seed_bundles/kr_materialisation_workflow_seed_bundle.json	Bumps seed to v8 and updates resolve-relationship-specs tool policy defaults + context fields.
src/backend/services/spreadsheet_materialisation_guard_service.py	Derives required_description_fragments from row field evidence statements and attaches them to generated artefact slots.
src/backend/services/kr_materialisation_workflow_vontology_service.py	Implements digest-gated prompt migration/readback enforcement and blocks publication on unreviewed drift.
src/backend/services/kr_materialisation_guard_service.py	Adds deterministic validation for fragment ownership (exact-once, wrong-slot, overlap/duplication) during plan validation.
scripts/generate_spreadsheet_programme_workflow_seed.py	Bumps seed version to v21 and emits reviewed legacy authority digest mapping into generated bundle.