feat(openspec): Phase 4 Developer Growth & Go-to-Market Readiness
OpenSpec change: phase-4-developer-growth (spec-driven, 4/4 artifacts)
6 workstreams, 90 implementation tasks, delivery sequence:
WS1 → WS2 + WS3 (parallel) → WS4 → WS5 → WS6
Workstreams:
1. Production Hardening — ioredis rate limiting, DB pool tuning, /health/detailed, k6 load tests
2. Developer Portal — Next.js 14, Swagger UI explorer, onboarding wizard, pricing/SDK pages
3. CLI Tool — sentryagent npm CLI, 5 commands, shell completion
4. Agent Marketplace — public searchable registry powered by existing agent/DID infrastructure
5. GitHub Actions — register-agent + issue-token Actions via OIDC (no stored secrets)
6. Billing & Usage Metering — Stripe Checkout, webhook-driven state, free tier enforcement
New capabilities (8 specs): production-hardening, developer-portal, cli-tool,
agent-marketplace, github-actions, billing-metering (+delta: web-dashboard, monitoring)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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