fix: extend code queue pr preflight diagnostics

scripts/code-queue-pr-preflight-contract-test.ts

@@ -66,6 +66,7 @@ function fixtureRuntimePreflight(tokenPresent: boolean): JsonRecord {
         knownHostsPresent: true,
         privateKeyPresent: true,
       },
+      prCreateDryRun: tokenPresent ? { command: "sh", args: ["-lc", "bun scripts/cli.ts gh pr create --dry-run"], ok: true, exitCode: 0, signal: null, error: null, stdout: "{\"ok\":true,\"data\":{\"dryRun\":true}}", stderr: "" } : undefined,
       limitations: tokenPresent ? [] : ["GH_TOKEN/GITHUB_TOKEN is not present; gh cannot create PRs unless another gh credential store is mounted"],
       risks: [],
     },
@@ -114,6 +115,14 @@ export function runCodeQueuePrPreflightContract(): JsonRecord {
   const readyTokenCoverage = asRecord(readyPreflight.tokenCoverage);
   assertCondition(readyTokenCoverage.source === "GH_TOKEN", "ready token source should be redacted to key name only", readyTokenCoverage);
 
+  const prCreateDryRun = codexPrPreflightQueryForTest(["--remote", "--pr-create-dry-run", "--pr-create-dry-run-head", "codequeue/pr-probe"], (path) => {
+    assertCondition(path === "/api/microservices/code-queue/proxy/api/runtime-preflight?remote=1&prCreateDryRun=1&prCreateDryRunHead=codequeue%2Fpr-probe", "PR create dry-run options should map to query string", { path });
+    return fixtureResponse(true);
+  });
+  const prCreateDryRunPreflight = asRecord(asRecord(prCreateDryRun).preflight);
+  const prCreateDryRunProbe = asRecord(prCreateDryRunPreflight.prCreateDryRun);
+  assertCondition(prCreateDryRunProbe.ok === true, "PR create dry-run probe should be compacted", prCreateDryRunProbe);
+
   return {
     ok: true,
     checks: [
@@ -121,6 +130,7 @@ export function runCodeQueuePrPreflightContract(): JsonRecord {
       "missing GitHub token is infra-blocked",
       "token key names are reported without values",
       "push dry-run options are forwarded",
+      "PR create dry-run options are forwarded",
     ],
   };
 }