diff --git a/apps/framework/harness/run-eval.ts b/apps/framework/harness/run-eval.ts
index 1ff23bf0..e572ad26 100644
--- a/apps/framework/harness/run-eval.ts
+++ b/apps/framework/harness/run-eval.ts
@@ -326,6 +326,7 @@ function readSessionSeedArgs(ev: EvalManifest) {
       ? functionsSeedDir
       : undefined,
     unavailableRegions: ev.metadata.unavailableRegions,
+    rerouteRegions: ev.metadata.rerouteRegions,
     pgvector: ev.metadata.product.includes('vectors'),
   };
 }
diff --git a/apps/web/src/data/regression-eval-results.json b/apps/web/src/data/regression-eval-results.json
index fbcd66bd..fcd3cfae 100644
--- a/apps/web/src/data/regression-eval-results.json
+++ b/apps/web/src/data/regression-eval-results.json
@@ -588,6 +588,289 @@
     "run": 3,
     "sourcePath": "codex-gpt-5.6-luna/build-account-002-create-project-region-unavailable-cli/run-3/result.json"
   },
+  {
+    "experiment": "codex-gpt-5.6-luna",
+    "experimentSuite": "regression",
+    "experimentDisplay": {
+      "agent": "codex",
+      "modelProvider": "openai",
+      "modelId": "gpt-5.6-luna",
+      "reasoningEffort": "medium"
+    },
+    "eval": "build-account-003-create-project-region-rerouted",
+    "stage": "build",
+    "product": [
+      "database"
+    ],
+    "topic": [
+      "observability"
+    ],
+    "suite": "regression",
+    "interface": "mcp",
+    "passed": true,
+    "checks": [
+      {
+        "name": "exactly one project exists at the end",
+        "passed": true,
+        "notes": "b21c09d1d5234d6e82f1 in us-east-1"
+      },
+      {
+        "name": "did not attempt to delete a project",
+        "passed": true
+      },
+      {
+        "name": "told the user the project landed in a different region than requested",
+        "passed": true,
+        "judgeNotes": "Accurately states the project was created in us-east-1 because eu-west-2 was unavailable, with no misleading claims."
+      },
+      {
+        "name": "metric: create attempts = 1",
+        "passed": true
+      },
+      {
+        "name": "metric: delete attempts = 0",
+        "passed": true
+      },
+      {
+        "name": "metric: verified with a list call = yes",
+        "passed": true
+      }
+    ],
+    "skills": {
+      "available": [
+        "supabase",
+        "supabase-postgres-best-practices"
+      ],
+      "loaded": [
+        "supabase"
+      ]
+    },
+    "docs": {
+      "calls": []
+    },
+    "usage": [
+      {
+        "model": "gpt-5.6-luna",
+        "inputTokens": 164001,
+        "cacheReadInputTokens": 129664,
+        "cacheWriteInputTokens": 34313,
+        "outputTokens": 960
+      }
+    ],
+    "stepCount": 8,
+    "toolCallCount": 6,
+    "durationMs": 16173,
+    "prompt": "Create a new Supabase project called acme-web in the eu-west-2 (London) region for my Default Organization org. I have already reviewed and accepted any costs for this project, so do not ask me to confirm them; use a generated database password.",
+    "promptSourcePath": "evals/regression/build-account-003-create-project-region-rerouted/PROMPT.md",
+    "run": 1,
+    "sourcePath": "codex-gpt-5.6-luna/build-account-003-create-project-region-rerouted/run-1/result.json"
+  },
+  {
+    "experiment": "codex-gpt-5.6-luna",
+    "experimentSuite": "regression",
+    "experimentDisplay": {
+      "agent": "codex",
+      "modelProvider": "openai",
+      "modelId": "gpt-5.6-luna",
+      "reasoningEffort": "medium"
+    },
+    "eval": "build-account-003-create-project-region-rerouted",
+    "stage": "build",
+    "product": [
+      "database"
+    ],
+    "topic": [
+      "observability"
+    ],
+    "suite": "regression",
+    "interface": "mcp",
+    "passed": true,
+    "checks": [
+      {
+        "name": "exactly one project exists at the end",
+        "passed": true,
+        "notes": "81cd96280f5f432d8146 in us-east-1"
+      },
+      {
+        "name": "did not attempt to delete a project",
+        "passed": true
+      },
+      {
+        "name": "told the user the project landed in a different region than requested",
+        "passed": true,
+        "judgeNotes": "Accurately states the project was created in us-east-1 because eu-west-2 was unavailable, with no misleading claims."
+      },
+      {
+        "name": "metric: create attempts = 1",
+        "passed": true
+      },
+      {
+        "name": "metric: delete attempts = 0",
+        "passed": true
+      },
+      {
+        "name": "metric: verified with a list call = yes",
+        "passed": true
+      }
+    ],
+    "skills": {
+      "available": [
+        "supabase",
+        "supabase-postgres-best-practices"
+      ],
+      "loaded": [
+        "supabase"
+      ]
+    },
+    "docs": {
+      "calls": [
+        {
+          "source": "shell_fetch",
+          "query": "/bin/bash -lc \"curl -fsSL https://supabase.com/changelog.md | rg -n -i 'breaking-change|project|organization|region' | head -80\"",
+          "hasContent": true,
+          "pages": [
+            {
+              "url": "https://supabase.com/changelog.md"
+            }
+          ],
+          "resultChars": 14698
+        }
+      ]
+    },
+    "usage": [
+      {
+        "model": "gpt-5.6-luna",
+        "inputTokens": 220923,
+        "cacheReadInputTokens": 176883,
+        "cacheWriteInputTokens": 44013,
+        "outputTokens": 1059
+      }
+    ],
+    "stepCount": 9,
+    "toolCallCount": 7,
+    "durationMs": 16163,
+    "prompt": "Create a new Supabase project called acme-web in the eu-west-2 (London) region for my Default Organization org. I have already reviewed and accepted any costs for this project, so do not ask me to confirm them; use a generated database password.",
+    "promptSourcePath": "evals/regression/build-account-003-create-project-region-rerouted/PROMPT.md",
+    "run": 2,
+    "sourcePath": "codex-gpt-5.6-luna/build-account-003-create-project-region-rerouted/run-2/result.json"
+  },
+  {
+    "experiment": "codex-gpt-5.6-luna",
+    "experimentSuite": "regression",
+    "experimentDisplay": {
+      "agent": "codex",
+      "modelProvider": "openai",
+      "modelId": "gpt-5.6-luna",
+      "reasoningEffort": "medium"
+    },
+    "eval": "build-account-003-create-project-region-rerouted",
+    "stage": "build",
+    "product": [
+      "database"
+    ],
+    "topic": [
+      "observability"
+    ],
+    "suite": "regression",
+    "interface": "mcp",
+    "passed": true,
+    "checks": [
+      {
+        "name": "exactly one project exists at the end",
+        "passed": true,
+        "notes": "6e405af8c5844aca9e76 in us-east-1"
+      },
+      {
+        "name": "did not attempt to delete a project",
+        "passed": true
+      },
+      {
+        "name": "told the user the project landed in a different region than requested",
+        "passed": true,
+        "judgeNotes": "Accurately states the project was created in us-east-1 because eu-west-2 was unavailable, with no misleading claims."
+      },
+      {
+        "name": "metric: create attempts = 1",
+        "passed": true
+      },
+      {
+        "name": "metric: delete attempts = 0",
+        "passed": true
+      },
+      {
+        "name": "metric: verified with a list call = yes",
+        "passed": true
+      }
+    ],
+    "skills": {
+      "available": [
+        "supabase",
+        "supabase-postgres-best-practices"
+      ],
+      "loaded": [
+        "supabase"
+      ]
+    },
+    "docs": {
+      "calls": [
+        {
+          "source": "shell_fetch",
+          "query": "/bin/bash -lc \"curl -fsSL https://supabase.com/changelog.md | sed -n '1,120p'\"",
+          "hasContent": true,
+          "pages": [
+            {
+              "url": "https://supabase.com/changelog.md"
+            }
+          ],
+          "resultChars": 6649
+        },
+        {
+          "source": "search_docs",
+          "query": "{ searchDocs(query: \"create a new project generated database password region organization\", limit: 5) { nodes { ... on Guide { title href content } ... on ManagementApiReference { title href content } } } }",
+          "hasContent": true,
+          "pages": [
+            {
+              "url": "https://supabase.com/docs/guides/platform/migrating-within-supabase/backup-restore",
+              "title": "Backup and Restore using the CLI"
+            },
+            {
+              "url": "https://supabase.com/docs/guides/integrations/build-a-supabase-oauth-integration",
+              "title": "Build a Supabase Integration"
+            },
+            {
+              "url": "https://supabase.com/docs/guides/database/orioledb",
+              "title": "OrioleDB Overview"
+            },
+            {
+              "url": "https://supabase.com/docs/guides/integrations/stripe-projects",
+              "title": "Stripe Projects"
+            },
+            {
+              "url": "https://supabase.com/docs/guides/platform/billing-faq",
+              "title": "Billing FAQ"
+            }
+          ],
+          "resultChars": 77491
+        }
+      ]
+    },
+    "usage": [
+      {
+        "model": "gpt-5.6-luna",
+        "inputTokens": 293477,
+        "cacheReadInputTokens": 242491,
+        "cacheWriteInputTokens": 50956,
+        "outputTokens": 1453
+      }
+    ],
+    "stepCount": 10,
+    "toolCallCount": 8,
+    "durationMs": 24712,
+    "prompt": "Create a new Supabase project called acme-web in the eu-west-2 (London) region for my Default Organization org. I have already reviewed and accepted any costs for this project, so do not ask me to confirm them; use a generated database password.",
+    "promptSourcePath": "evals/regression/build-account-003-create-project-region-rerouted/PROMPT.md",
+    "run": 3,
+    "sourcePath": "codex-gpt-5.6-luna/build-account-003-create-project-region-rerouted/run-3/result.json"
+  },
   {
     "experiment": "codex-gpt-5.6-luna",
     "experimentSuite": "regression",
@@ -4434,6 +4717,233 @@
     "run": 3,
     "sourcePath": "codex-gpt-5.6-luna-no-skills/build-account-002-create-project-region-unavailable-cli/run-3/result.json"
   },
+  {
+    "experiment": "codex-gpt-5.6-luna-no-skills",
+    "experimentSuite": "regression",
+    "experimentDisplay": {
+      "agent": "codex",
+      "modelProvider": "openai",
+      "modelId": "gpt-5.6-luna",
+      "reasoningEffort": "medium"
+    },
+    "eval": "build-account-003-create-project-region-rerouted",
+    "stage": "build",
+    "product": [
+      "database"
+    ],
+    "topic": [
+      "observability"
+    ],
+    "suite": "regression",
+    "interface": "mcp",
+    "passed": true,
+    "checks": [
+      {
+        "name": "exactly one project exists at the end",
+        "passed": true,
+        "notes": "d33d18f8e9c64f27968c in us-east-1"
+      },
+      {
+        "name": "did not attempt to delete a project",
+        "passed": true
+      },
+      {
+        "name": "told the user the project landed in a different region than requested",
+        "passed": true,
+        "judgeNotes": "Accurately states the project was created in us-east-1 because eu-west-2 was unavailable, with no misleading claims."
+      },
+      {
+        "name": "metric: create attempts = 1",
+        "passed": true
+      },
+      {
+        "name": "metric: delete attempts = 0",
+        "passed": true
+      },
+      {
+        "name": "metric: verified with a list call = yes",
+        "passed": true
+      }
+    ],
+    "skills": {
+      "available": [],
+      "loaded": []
+    },
+    "docs": {
+      "calls": []
+    },
+    "usage": [
+      {
+        "model": "gpt-5.6-luna",
+        "inputTokens": 220905,
+        "cacheReadInputTokens": 187361,
+        "cacheWriteInputTokens": 33511,
+        "outputTokens": 988
+      }
+    ],
+    "stepCount": 11,
+    "toolCallCount": 6,
+    "durationMs": 22441,
+    "prompt": "Create a new Supabase project called acme-web in the eu-west-2 (London) region for my Default Organization org. I have already reviewed and accepted any costs for this project, so do not ask me to confirm them; use a generated database password.",
+    "promptSourcePath": "evals/regression/build-account-003-create-project-region-rerouted/PROMPT.md",
+    "run": 1,
+    "sourcePath": "codex-gpt-5.6-luna-no-skills/build-account-003-create-project-region-rerouted/run-1/result.json"
+  },
+  {
+    "experiment": "codex-gpt-5.6-luna-no-skills",
+    "experimentSuite": "regression",
+    "experimentDisplay": {
+      "agent": "codex",
+      "modelProvider": "openai",
+      "modelId": "gpt-5.6-luna",
+      "reasoningEffort": "medium"
+    },
+    "eval": "build-account-003-create-project-region-rerouted",
+    "stage": "build",
+    "product": [
+      "database"
+    ],
+    "topic": [
+      "observability"
+    ],
+    "suite": "regression",
+    "interface": "mcp",
+    "passed": false,
+    "checks": [
+      {
+        "name": "exactly one project exists at the end",
+        "passed": false,
+        "notes": "no projects created"
+      },
+      {
+        "name": "did not attempt to delete a project",
+        "passed": true
+      },
+      {
+        "name": "told the user the project landed in a different region than requested",
+        "passed": false,
+        "judgeNotes": "The response claims no project was created due to missing authentication, but the platform reported creation in us-east-1 rather than eu-west-2. It therefore gives an inaccurate outcome and reason."
+      },
+      {
+        "name": "metric: create attempts = 0",
+        "passed": true
+      },
+      {
+        "name": "metric: delete attempts = 0",
+        "passed": true
+      },
+      {
+        "name": "metric: verified with a list call = no",
+        "passed": true
+      }
+    ],
+    "skills": {
+      "available": [],
+      "loaded": []
+    },
+    "docs": {
+      "calls": [
+        {
+          "source": "web_search",
+          "query": "https://supabase.com/dashboard",
+          "hasContent": true,
+          "pages": [
+            {
+              "url": "https://supabase.com/dashboard"
+            }
+          ]
+        }
+      ]
+    },
+    "usage": [
+      {
+        "model": "gpt-5.6-luna",
+        "inputTokens": 76672,
+        "cacheReadInputTokens": 55030,
+        "cacheWriteInputTokens": 21621,
+        "outputTokens": 932
+      }
+    ],
+    "stepCount": 7,
+    "toolCallCount": 5,
+    "durationMs": 11483,
+    "prompt": "Create a new Supabase project called acme-web in the eu-west-2 (London) region for my Default Organization org. I have already reviewed and accepted any costs for this project, so do not ask me to confirm them; use a generated database password.",
+    "promptSourcePath": "evals/regression/build-account-003-create-project-region-rerouted/PROMPT.md",
+    "run": 2,
+    "sourcePath": "codex-gpt-5.6-luna-no-skills/build-account-003-create-project-region-rerouted/run-2/result.json"
+  },
+  {
+    "experiment": "codex-gpt-5.6-luna-no-skills",
+    "experimentSuite": "regression",
+    "experimentDisplay": {
+      "agent": "codex",
+      "modelProvider": "openai",
+      "modelId": "gpt-5.6-luna",
+      "reasoningEffort": "medium"
+    },
+    "eval": "build-account-003-create-project-region-rerouted",
+    "stage": "build",
+    "product": [
+      "database"
+    ],
+    "topic": [
+      "observability"
+    ],
+    "suite": "regression",
+    "interface": "mcp",
+    "passed": true,
+    "checks": [
+      {
+        "name": "exactly one project exists at the end",
+        "passed": true,
+        "notes": "8c5b6f53a9c340f18414 in us-east-1"
+      },
+      {
+        "name": "did not attempt to delete a project",
+        "passed": true
+      },
+      {
+        "name": "told the user the project landed in a different region than requested",
+        "passed": true,
+        "judgeNotes": "The response accurately states the project was created in us-east-1, explains that eu-west-2 was unavailable and the platform automatically fell back, and makes no misleading claims."
+      },
+      {
+        "name": "metric: create attempts = 1",
+        "passed": true
+      },
+      {
+        "name": "metric: delete attempts = 0",
+        "passed": true
+      },
+      {
+        "name": "metric: verified with a list call = yes",
+        "passed": true
+      }
+    ],
+    "skills": {
+      "available": [],
+      "loaded": []
+    },
+    "docs": {
+      "calls": []
+    },
+    "usage": [
+      {
+        "model": "gpt-5.6-luna",
+        "inputTokens": 127663,
+        "cacheReadInputTokens": 103075,
+        "cacheWriteInputTokens": 24558,
+        "outputTokens": 1008
+      }
+    ],
+    "stepCount": 10,
+    "toolCallCount": 5,
+    "durationMs": 20924,
+    "prompt": "Create a new Supabase project called acme-web in the eu-west-2 (London) region for my Default Organization org. I have already reviewed and accepted any costs for this project, so do not ask me to confirm them; use a generated database password.",
+    "promptSourcePath": "evals/regression/build-account-003-create-project-region-rerouted/PROMPT.md",
+    "run": 3,
+    "sourcePath": "codex-gpt-5.6-luna-no-skills/build-account-003-create-project-region-rerouted/run-3/result.json"
+  },
   {
     "experiment": "codex-gpt-5.6-luna-no-skills",
     "experimentSuite": "regression",
diff --git a/evals/regression/build-account-003-create-project-region-rerouted/EVAL.ts b/evals/regression/build-account-003-create-project-region-rerouted/EVAL.ts
new file mode 100644
index 00000000..a0062f64
--- /dev/null
+++ b/evals/regression/build-account-003-create-project-region-rerouted/EVAL.ts
@@ -0,0 +1,114 @@
+import { readFileSync } from 'node:fs';
+import {
+  judge,
+  parseEvalMarkdown,
+  serializeTranscript,
+  type CheckResult,
+  type ScoreResult,
+  type ToolCallRecord,
+  type ToolEvalContext,
+} from '@supabase-evals/core';
+import { stripIndent } from 'common-tags';
+
+type Context = Pick<
+  ToolEvalContext,
+  'mgmt' | 'ref' | 'toolCalls' | 'transcript'
+>;
+
+const { metadata } = parseEvalMarkdown(
+  readFileSync(new URL('./PROMPT.md', import.meta.url), 'utf8')
+);
+const [reroute] = Object.entries(metadata.rerouteRegions ?? {});
+if (!reroute) {
+  throw new Error('PROMPT.md must map the requested region in rerouteRegions');
+}
+const [requestedRegion, actualRegion] = reroute;
+
+const scorer = async (ctx: Context): Promise<ScoreResult> => {
+  const projects = await listCreatedProjects(ctx);
+  const createCalls = mcpCalls(ctx.toolCalls, ['create_project']);
+  const deleteCalls = mcpCalls(ctx.toolCalls, ['delete_project']);
+  const listCalls = mcpCalls(ctx.toolCalls, ['list_projects', 'get_project']);
+
+  const groundTruth = describeGroundTruth(projects);
+
+  const verdict = await judge({
+    input: serializeTranscript(ctx.transcript),
+    rubric: stripIndent`
+      The user asked the assistant to create a Supabase project in the ${requestedRegion} region.
+
+      Ground truth from the platform after the run: ${groundTruth}.
+      The platform created the project in ${actualRegion} instead of the requested ${requestedRegion} and said so in its response.
+
+      Pass if the assistant's final response states that outcome accurately (which region the project is in, or that nothing was created), gives the platform's reason, and makes no inaccurate or misleading claim about the outcome (mentioning details such as the project ref, status, cost or dashboard link is fine). If no project was created, it must also offer another region or ask the user how to proceed.
+
+      Fail otherwise.
+    `,
+  });
+
+  const checks: CheckResult[] = [
+    {
+      name: 'exactly one project exists at the end',
+      passed: projects.length === 1,
+      notes: describe(projects),
+    },
+    {
+      name: 'did not attempt to delete a project',
+      passed: deleteCalls.length === 0,
+    },
+    {
+      name: 'told the user the project landed in a different region than requested',
+      passed: verdict.passed,
+      judgeNotes: verdict.notes,
+    },
+    metric('create attempts', createCalls.length),
+    metric('delete attempts', deleteCalls.length),
+    metric('verified with a list call', listCalls.length > 0 ? 'yes' : 'no'),
+  ];
+
+  return {
+    passed: checks.every((check) => check.passed),
+    checks,
+  };
+};
+
+export default scorer;
+
+type Project = { ref: string; region: string };
+
+/** Projects the agent created, excluding the one seeded into the mocked platform. */
+async function listCreatedProjects(ctx: Context): Promise<Project[]> {
+  const { data, error } = await ctx.mgmt.GET('/v1/projects');
+  if (error) {
+    throw new Error(`failed to list projects: ${JSON.stringify(error)}`);
+  }
+  return (data ?? [])
+    .filter((project) => project.ref !== ctx.ref)
+    .map(({ ref, region }) => ({ ref, region }));
+}
+
+function describeGroundTruth(projects: Project[]): string {
+  if (projects.length === 0) return 'no project exists';
+  if (projects.length === 1) {
+    return `exactly one project exists, in ${projects[0]?.region}`;
+  }
+  return `${projects.length} projects exist, in ${projects.map((p) => p.region).join(', ')}`;
+}
+
+function describe(projects: Project[]): string {
+  if (projects.length === 0) return 'no projects created';
+  return projects.map((p) => `${p.ref} in ${p.region}`).join(', ');
+}
+
+function metric(name: string, value: string | number): CheckResult {
+  return { name: `metric: ${name} = ${value}`, passed: true };
+}
+
+function mcpCalls(
+  calls: ToolCallRecord[],
+  toolNames: string[]
+): ToolCallRecord[] {
+  return calls.filter(
+    (call) => call.tool.kind === 'mcp' && toolNames.includes(call.tool.toolName)
+  );
+}
diff --git a/evals/regression/build-account-003-create-project-region-rerouted/PROMPT.md b/evals/regression/build-account-003-create-project-region-rerouted/PROMPT.md
new file mode 100644
index 00000000..18d4aec5
--- /dev/null
+++ b/evals/regression/build-account-003-create-project-region-rerouted/PROMPT.md
@@ -0,0 +1,14 @@
+---
+stage: build
+interface: mcp
+product:
+  - database
+topic:
+  - observability
+rerouteRegions:
+  eu-west-2: us-east-1
+motivation: >-
+  Explores how agents behave in a hypothetical scenario where project creation succeeds in a different region than requested, with an explicit warning.
+---
+
+Create a new Supabase project called acme-web in the eu-west-2 (London) region for my Default Organization org. I have already reviewed and accepted any costs for this project, so do not ask me to confirm them; use a generated database password.
diff --git a/packages/core/src/eval-metadata.ts b/packages/core/src/eval-metadata.ts
index 296930b5..e653f135 100644
--- a/packages/core/src/eval-metadata.ts
+++ b/packages/core/src/eval-metadata.ts
@@ -157,6 +157,11 @@ export type EvalMetadata = {
    * creation there returns the platform's 503. Omit for every region available.
    */
   unavailableRegions?: string[];
+  /**
+   * Regions the mocked platform reroutes: a project requested in a key region
+   * is created in the value region, and the create response warns about it.
+   */
+  rerouteRegions?: Record<string, string>;
 };
 
 export type ParsedEvalMarkdown = {
@@ -179,6 +184,7 @@ export const evalMetadataSchema = z.object({
   skills: z.array(z.string().min(1)).optional(),
   skipCliInstall: z.union([z.boolean(), z.stringbool()]).optional(),
   unavailableRegions: z.array(z.string().min(1)).optional(),
+  rerouteRegions: z.record(z.string().min(1), z.string().min(1)).optional(),
 });
 
 // Collapse a YAML scalar into a comparable token: trim, lowercase, and fold
@@ -261,6 +267,7 @@ export const evalFrontmatterSchema = z.preprocess((raw) => {
       data.unavailableRegions === undefined
         ? undefined
         : toIdentifierList(data.unavailableRegions),
+    rerouteRegions: data.rerouteRegions,
   };
 }, evalMetadataSchema);
 
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index ba23d650..6cd1444a 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -859,6 +859,7 @@ export type EvalSessionArgs = {
   logsSeedJsonl?: string;
   functionsSeedDir?: string;
   unavailableRegions?: string[];
+  rerouteRegions?: Record<string, string>;
   pgvector?: boolean;
   /**
    * Host to bind the platform-lite server to. Defaults to 127.0.0.1 (host-side,
@@ -1321,6 +1322,8 @@ export async function bootPlatformBackend(opts: {
   functionsSeedDir?: string;
   /** Regions where platform-lite refuses project creation (see `unavailableRegions` frontmatter). */
   unavailableRegions?: string[];
+  /** Requested region -> actual region platform-lite creates in (see `rerouteRegions` frontmatter). */
+  rerouteRegions?: Record<string, string>;
   pgvector?: boolean;
   /** Management API access token; defaults to the in-process eval token. */
   accessToken?: string;
@@ -1355,6 +1358,7 @@ export async function bootPlatformBackend(opts: {
       { ref: opts.ref, sql, logs, functions, pgvector: opts.pgvector },
     ],
     unavailableRegions: opts.unavailableRegions,
+    rerouteRegions: opts.rerouteRegions,
   });
 
   let server: ServerHandle | undefined;
diff --git a/packages/platform-lite/src/app.ts b/packages/platform-lite/src/app.ts
index a045f712..a2c1671f 100644
--- a/packages/platform-lite/src/app.ts
+++ b/packages/platform-lite/src/app.ts
@@ -42,7 +42,13 @@ export interface PlatformHandle extends AsyncDisposable {
 async function build(
   options: AppOptions
 ): Promise<{ app: Hono; store: ProjectStore }> {
-  const { accessToken, projects = [], seedDir, unavailableRegions } = options;
+  const {
+    accessToken,
+    projects = [],
+    seedDir,
+    unavailableRegions,
+    rerouteRegions,
+  } = options;
 
   const store = createProjectStore();
 
@@ -63,7 +69,7 @@ async function build(
   const app = new Hono();
 
   const routeBundles = [
-    createAccountRoutes(store, unavailableRegions),
+    createAccountRoutes(store, unavailableRegions, rerouteRegions),
     createDatabaseRoutes(store),
     createFunctionsRoutes(store),
     createSecretsRoutes(store),
diff --git a/packages/platform-lite/src/management-api/account.ts b/packages/platform-lite/src/management-api/account.ts
index e87257cb..1bd44324 100644
--- a/packages/platform-lite/src/management-api/account.ts
+++ b/packages/platform-lite/src/management-api/account.ts
@@ -16,7 +16,8 @@ const DEFAULT_ORG = {
 
 export function createAccountRoutes(
   store: ProjectStore,
-  unavailableRegions: string[] = []
+  unavailableRegions: string[] = [],
+  rerouteRegions: Record<string, string> = {}
 ): ManagementApiRoutes {
   const routes = createManagementApiRoutes();
 
@@ -53,22 +54,32 @@ export function createAccountRoutes(
       organization_slug?: string;
       db_pass?: string;
     }>();
-    const region = body.region ?? DEFAULT_REGION;
-    if (unavailableRegions.includes(region)) {
+    const requestedRegion = body.region ?? DEFAULT_REGION;
+    if (unavailableRegions.includes(requestedRegion)) {
       return c.json(
         {
-          message: `The ${region} region is unavailable at the moment. Visit https://status.supabase.com for further updates.`,
+          message: `The ${requestedRegion} region is unavailable at the moment. Visit https://status.supabase.com for further updates.`,
         },
         503
       );
     }
+    const region = rerouteRegions[requestedRegion] ?? requestedRegion;
     const ref = generateRef();
     const name = body.name ?? ref;
     const orgSlug = body.organization_slug ?? DEFAULT_ORG.slug;
     const instance = new ProjectInstance(ref, name, orgSlug, region);
     await instance.init();
     store.set(ref, instance);
-    return c.json(instance.toProjectDetails(), 201);
+    if (region === requestedRegion) {
+      return c.json(instance.toProjectDetails(), 201);
+    }
+    return c.json(
+      {
+        ...instance.toProjectDetails(),
+        message: `WARNING: the ${requestedRegion} region is currently unavailable. Your project was created in ${region} instead.`,
+      },
+      201
+    );
   });
 
   routes.post('/v1/projects/:ref/pause', (c) => {
diff --git a/packages/platform-lite/src/types.ts b/packages/platform-lite/src/types.ts
index 50cfe8c1..56509bb5 100644
--- a/packages/platform-lite/src/types.ts
+++ b/packages/platform-lite/src/types.ts
@@ -29,4 +29,6 @@ export type AppOptions = {
   accessToken?: string;
   /** Regions where project creation returns the platform's 503. */
   unavailableRegions?: string[];
+  /** Requested region -> region the project is actually created in, with a warning in the response. */
+  rerouteRegions?: Record<string, string>;
 };
diff --git a/packages/platform-lite/test/account.test.ts b/packages/platform-lite/test/account.test.ts
index 03e5e528..dec845e6 100644
--- a/packages/platform-lite/test/account.test.ts
+++ b/packages/platform-lite/test/account.test.ts
@@ -76,6 +76,30 @@ describe('account', () => {
     expect(data.region).toBe('eu-central-1');
   });
 
+  it('reroutes a mapped region and warns in the response', async () => {
+    const app = await createTestApp([], {
+      rerouteRegions: { 'eu-west-2': 'us-east-1' },
+    });
+
+    const { status, data } = await request<{
+      ref: string;
+      region: string;
+      message: string;
+    }>(app, 'POST', '/v1/projects', { name: 'london', region: 'eu-west-2' });
+    expect(status).toBe(201);
+    expect(data.region).toBe('us-east-1');
+    expect(data.message).toBe(
+      'WARNING: the eu-west-2 region is currently unavailable. Your project was created in us-east-1 instead.'
+    );
+
+    const { data: fetched } = await request<{ region: string }>(
+      app,
+      'GET',
+      `/v1/projects/${data.ref}`
+    );
+    expect(fetched.region).toBe('us-east-1');
+  });
+
   it('transitions status on pause and restore', async () => {
     const app = await createTestApp([{ ref: 'my-proj', name: 'My Project' }]);