feat: GSN safety cases + STPA-for-AI schemas with bridges#109
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) Goal Structuring Notation for structured safety arguments: - 6 artifact types: safety-goal, safety-strategy, safety-solution, safety-context, safety-justification, away-goal - 5 link types: decomposes, supports, scopes, justifies, sub-goal-of - 4 traceability rules (goals need support, strategies need goals) - safety-case-stpa.bridge.yaml: STPA hazards → safety goals - safety-case-eu-ai-act.bridge.yaml: risk assessments → safety goals - rivet init --preset safety-case with starter artifacts Covers UL 4600, ISO/PAS 8800 assurance arguments.
Extends STPA for AI/ML systems with 7 new artifact types: - ml-controller, training-data-source, data-hazard, ml-uca, ml-loss-scenario, monitoring-trigger, retraining-requirement 5 traceability rules enforcing ML safety lifecycle. rivet init --preset stpa-ai with starter artifacts. Example project in examples/stpa-ai/. Based on DeepSTPA, UniSTPA, and ISO/PAS 8800 methodology.
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This was referenced Apr 2, 2026
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Summary
Two new safety schemas completing rivet's safety toolchain:
GSN Safety Case Schema (#103)
safety-case-stpa.bridge.yaml— STPA hazards → safety goalssafety-case-eu-ai-act.bridge.yaml— risk assessments → safety goalsrivet init --preset safety-caseSTPA-for-AI Extension (#105)
rivet init --preset stpa-aiexamples/stpa-ai/Schema count: 12 built-in (was 9)
common, dev, stpa, stpa-ai, aspice, cybersecurity, aadl, score, eu-ai-act, safety-case + 4 bridge schemas
Refs #103, #105.
Test plan
cargo check --workspace— clean🤖 Generated with Claude Code