feat: expose reusable readonly code agent sessions

scripts/src/code-agent-response-contract.mjs

@@ -146,10 +146,10 @@ export function classifyCodexRunnerCapability(payload, { httpStatus = null } = {
     if (partialRunnerProviders.has(provider) && runnerKind === "hwlab-readonly-runner") {
       return {
         status: "blocked",
-        level: "BLOCKED/controlled-readonly-session-registry",
+        level: "BLOCKED/controlled-readonly-long-lived-session",
         blocker: "controlled-readonly-not-long-lived",
         capabilityPass: false,
-        reason: "controlled-readonly-session-registry can expose bounded read-only tools, but it cannot pass the long-lived Codex stdio capability gate."
+        reason: "controlled-readonly-session-registry exposes a reusable read-only session, but it is not Codex stdio, workspace-write, or a full Code Agent capability pass."
       };
     }
     return {
@@ -471,7 +471,7 @@ export function classifyCodeAgentRuntimeBlock(payload, { httpStatus = null } = {
     };
   }
 
-  if (["session_expired", "session_reuse_conflict"].includes(errorCode)) {
+  if (["session_expired", "session_reuse_conflict", "session_failed", "session_interrupted"].includes(errorCode)) {
     return {
       blocked: true,
       status: "blocked",