Home Dashboard GitHub

58.3 → 78.5: Stochastic assessment remediation sprint

2026-04-10

securitytestingoperationsintelligencedocumentation

What We Built

A comprehensive remediation sprint driven by three rounds of stochastic multi-agent assessment (10 independent agents with different adversarial stances, plus an 11th bias auditor). Score trajectory: 58.3 → 72.7 → 78.5.

The sprint closed 8 of 9 assessment risks, shipped 7 pen test fixes, deleted 4,162 lines of dead code, and published the first formal SLA with incident runbooks.

Why It Matters

External auditors and enterprise buyers evaluate engineering maturity through evidence, not claims. This sprint converted every claimed capability into verifiable evidence: live WAF blocks, published k6 benchmarks, CloudWatch alarms with documented runbooks, and a versioned SLA with credit policy.

How It Works

Key changes:

  • Intent detector now blocks adversarial prompts (403, was annotate-only)
  • Per-tenant RPM ceiling with aggregate enforcement across all API keys
  • Streaming cascade retries with auto on provider failure before first byte
  • Mid-stream recovery emits structured SSE error frame instead of broken stream
  • Budget SIGTERM flush releases in-flight reservations on ECS task shutdown
  • RBAC scope validation filters against VALID_ROLES at runtime
  • JWT algorithm pinning prevents alg:none confusion attacks
  • Guardian bypass audit trail logs every X-BR-Guardian: off invocation

The Numbers

  • Assessment score: 58.3 → 78.5 (+20.2 points)
  • E2E failures: 159 → 0
  • Skipped tests: 45 → 4
  • Fortress tests: 74 → 140+
  • Dead code deleted: 23 files, 4,162 lines
  • Pen test findings: 15 found, 7 fixed, 6 debunked as false, 2 by-design
  • k6 baseline: 36.7 req/s, <100ms router overhead
  • CloudWatch alarms: 6 → 11
  • Version: 0.1.0 → 1.0.0-beta.1

Lockstep Checklist

  • [x] API Routes: Intent blocking, streaming cascade, mid-stream recovery
  • [x] TS SDK: ApiError.type extended with intent_violation, stream_interrupted
  • [x] Python SDK: BrainstormRouterError docstring updated
  • [x] MCP Schemas: No MCP changes this sprint
  • [x] Master Record: Assessment evidence + synthesis updated