diff --git a/src/cli/agent.ts b/src/cli/agent.ts
index e83af69a..8f833bfa 100644
--- a/src/cli/agent.ts
+++ b/src/cli/agent.ts
@@ -206,8 +206,8 @@ export class AgentInputError extends Error {}
  * state and credentials, other keys, and secret-manager tokens. Without them
  * the agent neither reuses the session's account nor acts as its sub-session.
  * A launch from inside a `quest gate` command does not admit the agent's own
- * expensive commands, so the gate's mark is dropped too. Each CLI keeps the
- * user's configuration directory.
+ * expensive commands, so the gate's mark is dropped too, as is the base a land
+ * check runs against. Each CLI keeps the user's configuration directory.
  */
 const STRIPPED = [
 	/^CLAUDE(?!_CONFIG_DIR$)/,
@@ -217,6 +217,7 @@ const STRIPPED = [
 	/^OP_/,
 	/^QUEST_API_KEYS$/,
 	/^QUEST_GATE_ADMITTED$/,
+	/^QUEST_LAND_BASE$/,
 ];
 
 /** The agent's environment: the user's, minus `STRIPPED`, plus its one key. */
diff --git a/test/agent.test.ts b/test/agent.test.ts
index da75f50d..0296fd1e 100644
--- a/test/agent.test.ts
+++ b/test/agent.test.ts
@@ -248,6 +248,7 @@ test("the agent environment holds only its own key", () => {
 			ANTHROPIC_BASE_URL: "https://proxy",
 			QUEST_API_KEYS: "a b",
 			QUEST_GATE_ADMITTED: "1",
+			QUEST_LAND_BASE: "0123456789abcdef0123456789abcdef01234567",
 			OP_SERVICE_ACCOUNT_TOKEN: "t",
 			OP_SESSION_me: "s",
 			OPENAI_API_KEY: "o",