import type { LocalWorkspacePolicy, Source,} from "#schema"; export type InvocationOperationKind = | "read" | "write" | "delete" | "execute" | "unknown"; export type InvocationDescriptor = { toolPath: string; sourceId: Source["id"]; sourceName: Source["name"]; sourceKind: Source["kind"]; sourceNamespace: string | null; operationKind: InvocationOperationKind; interaction: "auto" | "required"; approvalLabel: string | null;}; export type InvocationPolicyContext = { workspaceId: LocalWorkspacePolicy["workspaceId"];}; export type InvocationAuthorizationDecision = { kind: "allow" | "deny" | "require_interaction"; reason: string; matchedPolicyId: LocalWorkspacePolicy["id"] | null;}; const matchesGlob = (pattern: string, value: string): boolean => { const escaped = pattern .replace(/[.+?^${}()|[\]\\]/g, "\\$&") .replace(/\*/g, ".*"); return new RegExp(`^${escaped}$`).test(value);}; const policySpecificity = (policy: LocalWorkspacePolicy): number => policy.priority + Math.max(1, policy.resourcePattern.replace(/\*/g, "").length); const defaultDecisionForInvocation = ( descriptor: InvocationDescriptor,): InvocationAuthorizationDecision => { if (descriptor.interaction === "auto") { return { kind: "allow", reason: `${descriptor.approvalLabel ?? descriptor.toolPath} defaults to allow`, matchedPolicyId: null, }; } return { kind: "require_interaction", reason: `${descriptor.approvalLabel ?? descriptor.toolPath} defaults to approval`, matchedPolicyId: null, };}; const resolvePolicyDecision = ( policy: LocalWorkspacePolicy,): InvocationAuthorizationDecision => { if (policy.effect === "deny") { return { kind: "deny", reason: `Denied by policy ${policy.id}`, matchedPolicyId: policy.id, }; } if (policy.approvalMode === "required") { return { kind: "require_interaction", reason: `Approval required by policy ${policy.id}`, matchedPolicyId: policy.id, }; } return { kind: "allow", reason: `Allowed by policy ${policy.id}`, matchedPolicyId: policy.id, };}; export const evaluateInvocationPolicy = (input: { descriptor: InvocationDescriptor; args: unknown; policies: ReadonlyArray<LocalWorkspacePolicy>; context: InvocationPolicyContext;}): InvocationAuthorizationDecision => { const matchingPolicies = input.policies .filter((policy) => policy.enabled && policy.workspaceId === input.context.workspaceId && matchesGlob(policy.resourcePattern, input.descriptor.toolPath)) .sort((left, right) => policySpecificity(right) - policySpecificity(left) || left.updatedAt - right.updatedAt, ); const matched = matchingPolicies[0]; return matched ? resolvePolicyDecision(matched) : defaultDecisionForInvocation(input.descriptor);};
import type {
LocalWorkspacePolicy,
Source,
} from "#schema";
export type InvocationOperationKind =
| "read"
| "write"
| "delete"
| "execute"
| "unknown";
export type InvocationDescriptor = {
toolPath: string;
sourceId: Source["id"];
sourceName: Source["name"];
sourceKind: Source["kind"];
sourceNamespace: string | null;
operationKind: InvocationOperationKind;
interaction: "auto" | "required";
approvalLabel: string | null;
};
export type InvocationPolicyContext = {
workspaceId: LocalWorkspacePolicy["workspaceId"];
};
export type InvocationAuthorizationDecision = {
kind: "allow" | "deny" | "require_interaction";
reason: string;
matchedPolicyId: LocalWorkspacePolicy["id"] | null;
};
const matchesGlob = (pattern: string, value: string): boolean => {
const escaped = pattern
.replace(/[.+?^${}()|[\]\\]/g, "\\$&")
.replace(/\*/g, ".*");
return new RegExp(`^${escaped}$`).test(value);
};
const policySpecificity = (policy: LocalWorkspacePolicy): number =>
policy.priority + Math.max(1, policy.resourcePattern.replace(/\*/g, "").length);
const defaultDecisionForInvocation = (
descriptor: InvocationDescriptor,
): InvocationAuthorizationDecision => {
if (descriptor.interaction === "auto") {
return {
kind: "allow",
reason: `${descriptor.approvalLabel ?? descriptor.toolPath} defaults to allow`,
matchedPolicyId: null,
};
}
return {
kind: "require_interaction",
reason: `${descriptor.approvalLabel ?? descriptor.toolPath} defaults to approval`,
matchedPolicyId: null,
};
};
const resolvePolicyDecision = (
policy: LocalWorkspacePolicy,
): InvocationAuthorizationDecision => {
if (policy.effect === "deny") {
return {
kind: "deny",
reason: `Denied by policy ${policy.id}`,
matchedPolicyId: policy.id,
};
}
if (policy.approvalMode === "required") {
return {
kind: "require_interaction",
reason: `Approval required by policy ${policy.id}`,
matchedPolicyId: policy.id,
};
}
return {
kind: "allow",
reason: `Allowed by policy ${policy.id}`,
matchedPolicyId: policy.id,
};
};
export const evaluateInvocationPolicy = (input: {
descriptor: InvocationDescriptor;
args: unknown;
policies: ReadonlyArray<LocalWorkspacePolicy>;
context: InvocationPolicyContext;
}): InvocationAuthorizationDecision => {
const matchingPolicies = input.policies
.filter((policy) =>
policy.enabled
&& policy.workspaceId === input.context.workspaceId
&& matchesGlob(policy.resourcePattern, input.descriptor.toolPath))
.sort((left, right) =>
policySpecificity(right) - policySpecificity(left)
|| left.updatedAt - right.updatedAt,
);
const matched = matchingPolicies[0];
return matched ? resolvePolicyDecision(matched) : defaultDecisionForInvocation(input.descriptor);
};