Link negative test vectors v0.9

README.md

@@ -28,6 +28,7 @@ DigiEmu Core is moving toward a public standard structure for deterministic AI d
 
 - [DigiEmu Core Specification v0.9](docs/DIGIEMU_CORE_SPEC_v0.9.md)
 - [Test Vectors v0.9](docs/TEST_VECTORS_v0.9.md)
+- [Negative Test Vectors v0.9](docs/NEGATIVE_TEST_VECTORS_v0.9.md)
 - [Conformance v0.9](docs/CONFORMANCE_v0.9.md)
 - [Conformance Declaration v0.9](docs/CONFORMANCE_DECLARATION_v0.9.md)
 - [Conformance Declaration Schema v0.9](docs/CONFORMANCE_DECLARATION_SCHEMA_v0.9.json)
@@ -46,8 +47,7 @@ DigiEmu Core is moving toward a public standard structure for deterministic AI d
 ### Public standard path
 
 ```text
-Specification → Test Vectors → Conformance → Verify Report Examples → Verify Report Schema
-```
+Specification → Test Vectors → Negative Test Vectors → Conformance → Conformance Declaration → Conformance Declaration Schema → Verify Report Examples → Verify Report Schema```
 
 The specification explains the model.  
 The test vectors make verification reproducible.  

docs/CHANGELOG_STANDARDIZATION_v0.9.md

@@ -22,7 +22,7 @@ DigiEmu Core is being structured as an emerging public standard for deterministi
 The current public standard structure is:
 
 ```text
-Specification → Test Vectors → Conformance → Conformance Declaration → Verify Report Examples → Verify Report Schema```
+Specification → Test Vectors → Negative Test Vectors → Conformance → Conformance Declaration → Conformance Declaration Schema → Verify Report Examples → Verify Report Schema```
 
 Meaning:
 
@@ -93,6 +93,36 @@ This makes DigiEmu Core easier to test across independent implementations.
 
 ---
 
+---
+
+### DigiEmu Core Negative Test Vectors v0.9
+
+File:
+
+```text
+docs/NEGATIVE_TEST_VECTORS_v0.9.md
+```
+
+Purpose:
+
+Defines intentional FAIL and ERROR test vectors for DigiEmu Core verification.
+
+It supports validation of:
+
+- tampered snapshot behavior
+- malformed JSON behavior
+- missing snapshot handling
+- missing expected hash handling
+- unsupported hash algorithm handling
+- unsupported canonicalization handling
+- invalid field type handling
+- stable reason-code usage
+
+This helps ensure that DigiEmu Core implementations correctly distinguish between PASS, FAIL, and ERROR outcomes.
+
+---
+
+
 ### DigiEmu Core Conformance v0.9
 
 File:

docs/SPEC_INDEX_v1.0.md

@@ -24,6 +24,7 @@ These documents define the emerging public standard structure for DigiEmu Core.
 
 - `docs/DIGIEMU_CORE_SPEC_v0.9.md`
 - `docs/TEST_VECTORS_v0.9.md`
+- `docs/NEGATIVE_TEST_VECTORS_v0.9.md`
 - `docs/CONFORMANCE_v0.9.md`
 - `docs/CONFORMANCE_DECLARATION_v0.9.md`
 - `docs/CONFORMANCE_DECLARATION_SCHEMA_v0.9.json`