Returns every gateway policy in the current organization. The response includes both admin-created policies and runtime-materialized children of default_spend_cap and default_rate_limit policies (children carry parent_policy_id).

Spend tracking: each spend-cap policy carries current_spend_usd — the spend accumulated in the policy's active window.

Filters (all optional):

• policy_type — spend_cap, default_spend_cap, guard, route_config, model_fallback, rate_limit, or default_rate_limit
• subject_matcher_key + subject_matcher_value — narrow to policies whose subject_matchers contain {key, value}

For batch lookups by a set of subject values (e.g. many run_rule_ids at once), use POST /v1/platform/gateway-policies/search; it accepts the values in a JSON body and avoids the URL-length ceiling that a repeated query param would hit at scale.