diff --git a/backend/scripts/p2-acceptance.mjs b/backend/scripts/p2-acceptance.mjs
index 91c6b7bc..6c6432ac 100644
--- a/backend/scripts/p2-acceptance.mjs
+++ b/backend/scripts/p2-acceptance.mjs
@@ -1163,9 +1163,12 @@ async function realChecks(ctx) {
     {
       id: "schema_review",
       async run() {
-        // FK suggestion consumes the workspace's own introspected physical schema.
+        // FK suggestion consumes the workspace's own introspected physical schema and mines
+        // approved SQL joins for candidates.
         await runThothctlJson(ctx, "preprocess-dwh-filesystem", ["workspace", "preprocess", "dwh", "--workspace", "p2-filesystem"], 0);
-        const suggest = await runThothctlJson(ctx, "schema-suggest-filesystem", ["workspace", "schema", "suggest-fks", "--workspace", "p2-filesystem"], 3);
+        const sqlPath = join(ctx.run.root, "fixtures", "p2-filesystem.sql");
+        await atomicWrite(sqlPath, "SELECT v.id FROM dw.visits v JOIN dw.patients p ON v.patient_id = p.id\n");
+        const suggest = await runThothctlJson(ctx, "schema-suggest-filesystem", ["workspace", "schema", "suggest-fks", "--workspace", "p2-filesystem", "--from-sql", sqlPath], 3);
         assert(suggest.payload.code === "manual_review_required", "suggest did not block");
         assert(typeof suggest.payload.suggestedFksYaml === "string" && suggest.payload.suggestedFksYaml.length > 0, "suggested FK YAML missing");
         const digest = suggest.payload.artifactIdentities?.[0]?.digest;
@@ -1182,7 +1185,7 @@ async function realChecks(ctx) {
         ], 0);
         assert(checked.payload.status === "succeeded", "schema check failed");
         state.filesystemCandidateDigest = digest;
-        return { commands: ["thothctl"], artifacts: [...suggest.artifacts, ...checked.artifacts, await fileArtifact(ctx.run.root, "fixtures/p2-filesystem.candidates.yaml"), await fileArtifact(ctx.run.root, "fixtures/p2-filesystem.annotations.yaml")] };
+        return { commands: ["thothctl"], artifacts: [...suggest.artifacts, ...checked.artifacts, await fileArtifact(ctx.run.root, "fixtures/p2-filesystem.candidates.yaml"), await fileArtifact(ctx.run.root, "fixtures/p2-filesystem.annotations.yaml"), await fileArtifact(ctx.run.root, "fixtures/p2-filesystem.sql")] };
       },
     },
     {