# Latticra Runtime Boundary Abuse-Case Fixtures After Policy Expansion

Status: runtime boundary abuse-case fixture expansion after policy expansion
Source: local follow-up slice
Scope: deterministic runtime-boundary abuse-case fixtures, report assertions, policy-matrix assertions, domain-matrix assertions, guard coverage, public entry-point updates, and no-claim preservation. This document does not implement runtime execution, effect execution, capability enforcement, cryptographic verification, signing, host behavior, network behavior, MCP behavior, AI agent execution, model execution, tool execution, shell execution, production protection, sandboxing, malware prevention, ransomware prevention, certification, compliance, or runtime authority.

## Purpose

This record closes the next evidence gap named by the runtime boundary policy expansion:

```text
abuse-case mapping needs broader fixture coverage
```

The expansion is fixture coverage only.

It turns the abuse-case map from documentation-only policy evidence into deterministic C fixtures that exercise the current runtime-boundary classifier and report surface.

## Relationship to previous work

This fixture expansion depends on:

```text
docs/DEFENSIVE_THREAT_MODEL_VALIDATION_REFINEMENT.md
docs/RUNTIME_BOUNDARY_POLICY_EXPANSION_AFTER_THREAT_MODEL.md
docs/RUNTIME_BOUNDARY_POLICY_MATRIX_REFINEMENT.md
docs/RUNTIME_BOUNDARY_DOMAIN_MATRIX_REFINEMENT.md
docs/RUNTIME_BOUNDARY_DOMAIN_MATRIX_REPORT_INTEGRATION.md
include/latticra/runtime_boundary.h
include/latticra/runtime_boundary_domain_matrix.h
src/runtime_boundary.c
src/runtime_boundary_domain_matrix_eval.c
tests/runtime_boundary_abuse_case_fixtures.c
scripts/test-runtime-boundary-abuse-case-fixtures.sh
scripts/test-runtime-boundary-policy-expansion-after-threat-model.sh
scripts/test-runtime-boundary.sh
```

Those files remain no-effect and report/classification oriented.

## Current checkpoint

Current runtime-boundary abuse-case fixture posture:

```text
runtime_boundary_abuse_case_fixture_expansion_present=1
runtime_boundary_abuse_case_fixture_guard_present=1
runtime_boundary_abuse_case_c_fixtures_present=1
runtime_boundary_abuse_case_fixture_count=8
runtime_boundary_policy_expansion_after_threat_model_present=1
defensive_threat_model_validation_refinement_present=1
runtime_boundary_policy_matrix_present=1
runtime_boundary_domain_matrix_present=1
unknown_request_abuse_fixture_present=1
unknown_effect_abuse_fixture_present=1
future_gated_execution_abuse_fixture_present=1
operator_confirmation_non_override_fixture_present=1
denial_reason_report_fixture_present=1
authority_failure_abuse_fixture_present=1
invalid_lir_prerequisite_fixture_present=1
blocked_effect_abuse_fixture_present=1
report_reason_assertions_present=1
policy_matrix_assertions_present=1
domain_matrix_assertions_present=1
implementation_behavior_changed=0
runtime_execution_added=0
effect_execution_added=0
capability_enforcement_added=0
cryptographic_verification_added=0
signing_added=0
host_behavior_changed=0
network_behavior_changed=0
mcp_behavior_changed=0
agent_execution_added=0
model_execution_added=0
tool_execution_added=0
shell_execution_added=0
runtime_authority_granted=0
production_protection_claim_allowed=0
runtime_protection_claim_allowed=0
malware_prevention_claim_allowed=0
ransomware_prevention_claim_allowed=0
sandbox_claim_allowed=0
certification_claim_allowed=0
compliance_claim_allowed=0
external_endorsement_claimed=0
completion_estimate_review_required=0
```

## Fixture map

The new C fixture table covers:

| Fixture id | Abuse case | Expected current posture |
| --- | --- | --- |
| unknown-request-is-not-allowed | unknown request is treated as allowed | deny, unknown-request, invalid matrix |
| unknown-effect-is-not-allowed | unknown effect is treated as allowed | deny, unknown-effect, invalid matrix |
| future-gated-execution-is-not-executable | future-gated request is treated as executable | future-gated, planned gate, no execution |
| operator-confirmation-cannot-override-policy | operator confirmation overrides policy | deny, operator-confirmation-not-supported |
| denial-reason-stays-rendered | report omits denial reason | report includes deterministic denial reason |
| authority-failure-is-not-allowed | failed authority metadata is treated as allowed | deny, authority/prerequisite failure |
| invalid-lir-prerequisite-stays-denied | invalid LIR input reaches later behavior | deny, LIR prerequisite failure |
| blocked-effect-stays-blocked | blocked effect is treated as no-effect | deny, blocked-effect policy matrix |

Each fixture also asserts:

```text
no_effect=1
execution_allowed=0
mutation_allowed=0
file_io_allowed=0
network_allowed=0
server_allowed=0
recovery_allowed=0
rollback_allowed=0
hardware_allowed=0
boot_allowed=0
record_executed=0
```

## Validation

This fixture expansion is guarded by:

```sh
sh scripts/test-runtime-boundary-abuse-case-fixtures.sh
```

The guard verifies the documentation checkpoint, the fixture source, public entry points, and the runtime-boundary C test runner.

Expected focused fixture output:

```text
runtime_boundary_abuse_case_fixtures: ok
```

## Boundary

This expansion adds fixtures and guard coverage only.

It does not add runtime behavior, command execution, Lat execution, LIR execution, task effect execution, state mutation, file I/O, network I/O, server interaction, self-update, recovery behavior, rollback behavior, hardware support, boot behavior, terminal control, security isolation, sandboxing, malware prevention, ransomware prevention, certification, accreditation, compliance, production protection, operating-system completeness, or runtime authority.

The next valid work should remain completion-estimate review only if capability posture changes; otherwise continue small guarded report/status alignment only when drift appears.