diff --git a/scripts/push-12-offer-tier-schema.ts b/scripts/push-12-offer-tier-schema.ts
new file mode 100644
index 0000000..39cac2d
--- /dev/null
+++ b/scripts/push-12-offer-tier-schema.ts
@@ -0,0 +1,142 @@
+// PRODUCTION DEPLOY NOTE: This migration (0008_offer_tier_schema.sql) is additive-only
+// (ADD COLUMN IF NOT EXISTS, a guarded DO-block CHECK constraint, CREATE TABLE IF NOT
+// EXISTS, and CREATE INDEX IF NOT EXISTS — no drops/truncates). Per CLAUDE.md Data
+// Safety, this script MUST be run against PRODUCTION via SSH+docker exec BEFORE Phase
+// 12 Wave 3 code (query layer reading offer_tier_services/tier_letter/public_price/
+// category/ticket) is exercised against production data. This is the BLOCKING step
+// for Plan 02. Idempotent — safe to re-run.
+// Run: npx tsx scripts/push-12-offer-tier-schema.ts (with prod DATABASE_URL)
+import postgres from "postgres";
+
+async function push() {
+  const databaseUrl = process.env.DATABASE_URL;
+  if (!databaseUrl) {
+    console.error("DATABASE_URL environment variable is required");
+    process.exit(1);
+  }
+
+  const client = postgres(databaseUrl);
+
+  try {
+    console.log("Pushing offer tier schema migration (0008)...");
+
+    // offer_macros: archive flag + short description + category/ticket dimensions +
+    // structured transformation promise
+    const offerMacrosColumns: Array<[string, string]> = [
+      ["description", "text"],
+      ["category", "text"],
+      ["ticket", "text"],
+      ["is_archived", "boolean NOT NULL DEFAULT false"],
+      ["cliente_ideale", "text"],
+      ["risultato", "text"],
+      ["tempo", "text"],
+      ["pain", "text"],
+      ["metodo", "text"],
+    ];
+
+    for (const [column, type] of offerMacrosColumns) {
+      try {
+        await client.unsafe(
+          `ALTER TABLE offer_macros ADD COLUMN IF NOT EXISTS ${column} ${type}`
+        );
+        console.log(`  ✓ offer_macros.${column} ready`);
+      } catch (err: unknown) {
+        if (err instanceof Error && err.message.includes("already exists")) {
+          console.log(`  ✓ offer_macros.${column} already exists (skipped)`);
+        } else {
+          throw err;
+        }
+      }
+    }
+
+    // offer_micros: tier designation (A/B/C) + manual public price
+    const offerMicrosColumns: Array<[string, string]> = [
+      ["tier_letter", "text"],
+      ["public_price", "numeric(10, 2)"],
+    ];
+
+    for (const [column, type] of offerMicrosColumns) {
+      try {
+        await client.unsafe(
+          `ALTER TABLE offer_micros ADD COLUMN IF NOT EXISTS ${column} ${type}`
+        );
+        console.log(`  ✓ offer_micros.${column} ready`);
+      } catch (err: unknown) {
+        if (err instanceof Error && err.message.includes("already exists")) {
+          console.log(`  ✓ offer_micros.${column} already exists (skipped)`);
+        } else {
+          throw err;
+        }
+      }
+    }
+
+    // CHECK constraint for tier_letter, guarded so it's safe to re-run.
+    try {
+      await client.unsafe(`
+        DO $$
+        BEGIN
+          IF NOT EXISTS (
+            SELECT 1 FROM pg_constraint WHERE conname = 'offer_micros_tier_letter_check'
+          ) THEN
+            ALTER TABLE offer_micros
+              ADD CONSTRAINT offer_micros_tier_letter_check
+              CHECK (tier_letter IS NULL OR tier_letter IN ('A', 'B', 'C'));
+          END IF;
+        END $$;
+      `);
+      console.log("  ✓ offer_micros_tier_letter_check constraint ready");
+    } catch (err: unknown) {
+      if (err instanceof Error && err.message.includes("already exists")) {
+        console.log("  ✓ offer_micros_tier_letter_check already exists (skipped)");
+      } else {
+        throw err;
+      }
+    }
+
+    // New junction table: tier (offer_micros) <-> unified services catalog.
+    try {
+      await client.unsafe(`
+        CREATE TABLE IF NOT EXISTS offer_tier_services (
+          tier_id text NOT NULL REFERENCES offer_micros(id) ON DELETE CASCADE,
+          service_id text NOT NULL REFERENCES services(id) ON DELETE CASCADE,
+          created_at timestamp with time zone DEFAULT now() NOT NULL,
+          PRIMARY KEY (tier_id, service_id)
+        )
+      `);
+      console.log("  ✓ offer_tier_services table ready");
+    } catch (err: unknown) {
+      if (err instanceof Error && err.message.includes("already exists")) {
+        console.log("  ✓ offer_tier_services table already exists (skipped)");
+      } else {
+        throw err;
+      }
+    }
+
+    try {
+      await client.unsafe(`
+        CREATE INDEX IF NOT EXISTS offer_tier_services_tier_idx ON offer_tier_services USING btree (tier_id)
+      `);
+      console.log("  ✓ offer_tier_services_tier_idx index ready");
+    } catch (err: unknown) {
+      if (err instanceof Error && err.message.includes("already exists")) {
+        console.log("  ✓ offer_tier_services_tier_idx already exists (skipped)");
+      } else {
+        throw err;
+      }
+    }
+
+    console.log("✓ Migration 0008 (offer tier schema) applied successfully");
+    process.exit(0);
+  } catch (err: unknown) {
+    if (err instanceof Error) {
+      console.error("Error pushing migration:", err.message);
+    } else {
+      console.error("Unknown error:", err);
+    }
+    process.exit(1);
+  } finally {
+    await client.end();
+  }
+}
+
+push();
diff --git a/src/db/migrations/0008_offer_tier_schema.sql b/src/db/migrations/0008_offer_tier_schema.sql
new file mode 100644
index 0000000..51ef36b
--- /dev/null
+++ b/src/db/migrations/0008_offer_tier_schema.sql
@@ -0,0 +1,44 @@
+-- Phase 12: Offer Editor — additive schema for tier designations, public pricing,
+-- archive flag, category/ticket dimensions, structured transformation promise, and
+-- tier<->services junction. All statements additive/idempotent. No drops/truncates
+-- (Data Safety LOCKED).
+
+-- offer_macros: archive flag + short description + category/ticket dimensions +
+-- structured transformation promise
+ALTER TABLE offer_macros ADD COLUMN IF NOT EXISTS description text;
+ALTER TABLE offer_macros ADD COLUMN IF NOT EXISTS category text;
+ALTER TABLE offer_macros ADD COLUMN IF NOT EXISTS ticket text;
+ALTER TABLE offer_macros ADD COLUMN IF NOT EXISTS is_archived boolean NOT NULL DEFAULT false;
+ALTER TABLE offer_macros ADD COLUMN IF NOT EXISTS cliente_ideale text;
+ALTER TABLE offer_macros ADD COLUMN IF NOT EXISTS risultato text;
+ALTER TABLE offer_macros ADD COLUMN IF NOT EXISTS tempo text;
+ALTER TABLE offer_macros ADD COLUMN IF NOT EXISTS pain text;
+ALTER TABLE offer_macros ADD COLUMN IF NOT EXISTS metodo text;
+
+-- offer_micros: tier designation (A/B/C) + manual public price
+ALTER TABLE offer_micros ADD COLUMN IF NOT EXISTS tier_letter text;
+ALTER TABLE offer_micros ADD COLUMN IF NOT EXISTS public_price numeric(10, 2);
+
+-- CHECK constraint for tier_letter, added separately so the ADD COLUMN above stays
+-- idempotent even if the constraint already exists (guarded via DO block).
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_constraint WHERE conname = 'offer_micros_tier_letter_check'
+  ) THEN
+    ALTER TABLE offer_micros
+      ADD CONSTRAINT offer_micros_tier_letter_check
+      CHECK (tier_letter IS NULL OR tier_letter IN ('A', 'B', 'C'));
+  END IF;
+END $$;
+
+-- New junction table: tier (offer_micros) <-> unified services catalog.
+-- Additive replacement for legacy offer_micro_services (untouched, points to offer_services).
+CREATE TABLE IF NOT EXISTS offer_tier_services (
+  tier_id text NOT NULL REFERENCES offer_micros(id) ON DELETE CASCADE,
+  service_id text NOT NULL REFERENCES services(id) ON DELETE CASCADE,
+  created_at timestamp with time zone DEFAULT now() NOT NULL,
+  PRIMARY KEY (tier_id, service_id)
+);
+
+CREATE INDEX IF NOT EXISTS offer_tier_services_tier_idx ON offer_tier_services USING btree (tier_id);
diff --git a/src/db/migrations/meta/_journal.json b/src/db/migrations/meta/_journal.json
index 9397988..248fe36 100644
--- a/src/db/migrations/meta/_journal.json
+++ b/src/db/migrations/meta/_journal.json
@@ -22,6 +22,13 @@
       "when": 1781442000000,
       "tag": "0006_add_tags_table",
       "breakpoints": true
+    },
+    {
+      "idx": 8,
+      "version": "7",
+      "when": 1781700000000,
+      "tag": "0008_offer_tier_schema",
+      "breakpoints": true
     }
   ]
 }
\ No newline at end of file