---

name: policy-and-managed-settings description: Use whenever adding, modifying, or reviewing any Copilot, agent, LLM, AI, tool, permission, sandbox, MCP, model, telemetry, feature-gate, setting, configuration, or enterprise control—especially anything an organization or administrator may need to manage. Start here to decide whether it belongs in runtime managed settings, a typed SDK contract, VS Code configuration policy, extension policy, or a split implementation. Run on every new Copilot/agent/LLM control and ANY change that adds a policy: field.

Adding an Enterprise Policy

Choose the policy destination by where the governed behavior is implemented, not by which team requested it. Most controls for Copilot agent behavior belong in the SDK/runtime rather than VS Code.

flowchart TD
	A[Enterprise control] --> P{Existing permission policy<br/>introduced before VS Code 1.133.0?}
	P -->|Yes| L[Pre-1.133 compatibility migration]
	P -->|No| B{Where is the governed behavior implemented?}

	B -->|Copilot runtime, tools, MCP,<br/>sandbox, or agent loop| R[SDK/runtime managed setting]
	B -->|VS Code editor or workbench| V[VS Code configuration policy]
	B -->|Extension-provided setting| E[Extension policy]
	B -->|Independent runtime and editor behavior| M[Split runtime/editor control]

Follow the matching guide:

• SDK/runtime managed setting
• VS Code configuration policy
• Extension-provided setting
• Split runtime/editor control
• Pre-1.133 permission-policy migration
• Agent Host policy support and migration readiness

Use the support-maintenance guide when changing policy classifications, applied-requirement predicates, or admin migration-readiness diagnostics. It applies when reviewing an existing control as well as when adding a new one.

General rules:

• Runtime enforcement is authoritative for behavior executed inside the runtime.
• Do not duplicate a runtime parser, matcher, or security decision in VS Code.
• A VS Code policy is appropriate only for editor/workbench-owned behavior.
• New Copilot enterprise controls should target the shared managed-settings/SDK model.
• The VS Code settings-to-managed-settings bridge is a compatibility path for legacy settings only. Do not add a new VS Code setting in order to bridge it; define new runtime-owned controls directly in the managed-settings/SDK contract. The bridge itself is unconditional; do not reintroduce a compatibility gate for it.
• Run npm run export-policy-data for every VS Code or extension policy change. Never edit build/lib/policies/policyData.jsonc manually.

Deprecated and Historical Channels

Some policy channels remain supported for existing controls but are closed to new properties:

• GitHub token/account policy data (IPolicyData fields consumed by AccountPolicyService) is deprecated for new controls. Do not add new entitlement or policy properties from the GitHub token. Existing fields remain for compatibility.
• New Copilot enterprise controls use managed settings and runtime/SDK enforcement.
• Pre-1.133 permission-policy translation is a bounded migration, not a reusable channel.

When another channel is deprecated, record the boundary here and keep implementation details in the relevant destination guide.

Supporting references:

• GitHub Copilot managed settings
• Local policy testing

Keep these guides contract-focused. Document contributor decisions and behavioral invariants; point to source rather than copying implementation that will drift.

Trust executable source and tests over planning documents.