feat: enforcement gateway v2 - agent-facing MCP server with human-only approval

[jessfortemnaturae8717]

Summary

Complete enforcement layer rewrite with the core invariant:

The agent proposes. The gateway enforces. RecourseOS verifies consequences.

• Agents receive gateway tools, never raw credentials
• gateway_approve/gateway_reject removed (human-only control plane)
• Terraform is plan-bound (plan_id verification, hash, TTL, approval)
• kubectl split into operation-specific tools (get/logs vs apply/delete)
• Shell sandboxed with explicit allow/escalate/block lists
• Policy model: per-environment rules, protected namespaces

New Commands

recourse gateway serve -e prod      # Start enforcement gateway
recourse gateway doctor -e prod     # Run 28 self-tests

Gateway Doctor Output

✓ gateway_approve not exposed
✓ gateway_reject not exposed
✓ raw terraform/kubectl tools not exposed
✓ Terraform apply requires plan_id
✓ Terraform apply with expired plan_id fails
✓ Terraform apply without approval fails
✓ kubectl exec escalates by default
✓ kubectl delete namespace blocks
✓ Shell: curl | sh blocks
✓ Shell: rm -rf / blocks
... (28 tests total)

All tests passed - Gateway is production-ready

Trust Boundary

The agent does NOT receive raw Terraform, Kubernetes, shell, or cloud credentials.
The agent receives ONLY gateway tools.
The gateway owns execution credentials and applies policy, consequence evaluation,
approval checks, and audit logging before any mutation is executed.

Test plan

• npm run build passes
• recourse gateway doctor -e prod passes (28/28 tests)
• tools/list does not expose gateway_approve or gateway_reject
• terraform apply without plan_id fails
• kubectl exec escalates
• shell curl|bash blocks

🤖 Generated with Claude Code

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Load the policy file before serving requests

runGatewayMcpServer accepts --policy/policyFile, but this branch is a no-op, so the server always runs with defaults even when operators supply stricter production rules. That silently disables custom enforcement (protected namespaces, TTLs, shell blocks, etc.), which is a security/control-plane regression because callers believe policy overrides are active when they are not.

Useful? React with 👍 / 👎.

[chatgpt-codex-connector]

Honor workspace input when creating Terraform plans

gateway_terraform_plan accepts a workspace argument, but the plan command is executed without selecting or passing that workspace. As a result, plans run in whichever workspace is currently active, so the stored workspace metadata can be wrong and protections like workspace-specific approval policy can be bypassed unintentionally.

Useful? React with 👍 / 👎.

[chatgpt-codex-connector]

Add stdin source flag for inline kubectl manifests

When gateway_kubectl_apply is called with manifest (and no file), the code writes YAML to stdin but never adds -f - to kubectl apply. In this path kubectl has no manifest source argument, so inline-manifest applies fail at runtime instead of executing the evaluated change.

Useful? React with 👍 / 👎.

[chatgpt-codex-connector]

Validate environment values before using policy maps

The server trusts options.environment and stores it directly in currentEnvironment without normalization/validation. If callers pass values like production (which the CLI help text suggests), later lookups such as policy.environments[currentEnvironment] become undefined and mutation handlers return runtime errors instead of enforceable decisions.

Useful? React with 👍 / 👎.