HELM Compatibility Matrix

Tiers

Tier	Requirements	Badge
Compatible	L1 pass	🟢 Compatible
Verified	L1 + L2 + strict preflight + receipt binding	🔵 Verified
Sovereign	Verified + L3 degraded-path adversarial	🟣 Sovereign

Current Matrix

Sandbox Providers

Provider	Version	Compatible	Verified	Sovereign	Notes
Mock	1.0.0	✅	✅	✅	Built-in, deterministic
OpenSandbox	latest	✅	✅	🔲	Full preflight + receipt binding
E2B	latest	✅	✅	🔲	Full preflight + receipt binding
Daytona	latest	✅	🔲	🔲	Basic integration

Orchestrator Adapters

Framework	Language	Compatible	Verified	Notes
OpenAI Agents SDK	Python	✅	✅	Full governance + EvidencePack
OpenAI Agents SDK	TypeScript	✅	✅	+ Responses WS mode
MS Agent Framework	Python	✅	✅	RC adapter
MS Agent Framework	.NET	✅	🔲	Minimal example
LangChain	Python	✅	✅	Tool wrapper
Mastra	TypeScript	✅	✅	+ sandbox provider selection

MCP Clients

Client	Transport	Compatible	Notes
Claude Code	stdio (plugin)	✅	Auto-start via .mcp.json
Claude Desktop	stdio (.mcpb)	✅	Cross-platform binary bundle
Windsurf	stdio / HTTP	✅
Codex	stdio	✅	codex mcp add
VS Code	stdio	✅	.vscode/settings.json
Cursor	stdio	✅	.cursor/mcp.json

CI

The compatibility matrix is generated weekly by .github/workflows/compatibility_matrix.yml.

# Run conformance locally
helm conform --level L2 --json

# Run sandbox conformance
helm sandbox conform --provider opensandbox --tier verified --json