diff --git a/backend/alembic/env.py b/backend/alembic/env.py
index 069c808e..87f08042 100644
--- a/backend/alembic/env.py
+++ b/backend/alembic/env.py
@@ -24,6 +24,7 @@ from app.models.ai_session import AISession  # noqa: F401
 from app.models.ai_session_step import AISessionStep  # noqa: F401
 from app.models.psa_post_log import PsaPostLog  # noqa: F401
 from app.models.psa_member_mapping import PsaMemberMapping  # noqa: F401
+from app.models.script_builder_session import ScriptBuilderSession  # noqa: F401
 from app.core.config import settings
 
 # this is the Alembic Config object
diff --git a/backend/alembic/versions/062_add_script_builder_sessions_table.py b/backend/alembic/versions/062_add_script_builder_sessions_table.py
new file mode 100644
index 00000000..ceb8f701
--- /dev/null
+++ b/backend/alembic/versions/062_add_script_builder_sessions_table.py
@@ -0,0 +1,45 @@
+"""add_script_builder_sessions_table
+
+Revision ID: 062
+Revises: f0aad74ea51b
+Create Date: 2026-03-21 20:54:41.621748
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = '062'
+down_revision: Union[str, None] = 'f0aad74ea51b'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table('script_builder_sessions',
+        sa.Column('id', sa.UUID(), nullable=False),
+        sa.Column('user_id', sa.UUID(), nullable=False),
+        sa.Column('team_id', sa.UUID(), nullable=True),
+        sa.Column('language', sa.String(length=30), nullable=False, comment='Script language: powershell, bash, python'),
+        sa.Column('title', sa.String(length=200), nullable=True, comment='Auto-generated from first AI response'),
+        sa.Column('messages', postgresql.JSONB(astext_type=sa.Text()), nullable=False, comment='Array of {role, content, script?, script_filename?, timestamp}'),
+        sa.Column('latest_script', sa.Text(), nullable=True, comment='Most recent generated script for quick access'),
+        sa.Column('latest_script_filename', sa.String(length=200), nullable=True, comment='Filename of the latest generated script'),
+        sa.Column('message_count', sa.Integer(), nullable=False),
+        sa.Column('ai_session_id', sa.UUID(), nullable=True, comment='Link to FlowPilot session if launched from there'),
+        sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
+        sa.Column('updated_at', sa.DateTime(timezone=True), nullable=False),
+        sa.ForeignKeyConstraint(['ai_session_id'], ['ai_sessions.id'], ondelete='SET NULL'),
+        sa.ForeignKeyConstraint(['team_id'], ['teams.id'], ondelete='SET NULL'),
+        sa.ForeignKeyConstraint(['user_id'], ['users.id'], ondelete='CASCADE'),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_script_builder_sessions_user_id'), 'script_builder_sessions', ['user_id'], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_index(op.f('ix_script_builder_sessions_user_id'), table_name='script_builder_sessions')
+    op.drop_table('script_builder_sessions')
diff --git a/backend/app/models/script_builder_session.py b/backend/app/models/script_builder_session.py
new file mode 100644
index 00000000..fe8009e9
--- /dev/null
+++ b/backend/app/models/script_builder_session.py
@@ -0,0 +1,76 @@
+"""Script Builder session model.
+
+Tracks AI-powered script generation conversations.
+"""
+import uuid
+from datetime import datetime, timezone
+from typing import Optional, Any, TYPE_CHECKING
+
+from sqlalchemy import String, Text, DateTime, ForeignKey, Integer
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from sqlalchemy.dialects.postgresql import UUID, JSONB
+
+from app.core.database import Base
+
+if TYPE_CHECKING:
+    from app.models.user import User
+
+
+class ScriptBuilderSession(Base):
+    """A conversation session in the AI Script Builder."""
+    __tablename__ = "script_builder_sessions"
+
+    id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4
+    )
+    user_id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True),
+        ForeignKey("users.id", ondelete="CASCADE"),
+        nullable=False,
+        index=True,
+    )
+    team_id: Mapped[Optional[uuid.UUID]] = mapped_column(
+        UUID(as_uuid=True),
+        ForeignKey("teams.id", ondelete="SET NULL"),
+        nullable=True,
+    )
+    language: Mapped[str] = mapped_column(
+        String(30), nullable=False, default="powershell",
+        comment="Script language: powershell, bash, python",
+    )
+    title: Mapped[Optional[str]] = mapped_column(
+        String(200), nullable=True,
+        comment="Auto-generated from first AI response",
+    )
+    messages: Mapped[list[dict[str, Any]]] = mapped_column(
+        JSONB, nullable=False, default=list,
+        comment="Array of {role, content, script?, script_filename?, timestamp}",
+    )
+    latest_script: Mapped[Optional[str]] = mapped_column(
+        Text, nullable=True,
+        comment="Most recent generated script for quick access",
+    )
+    latest_script_filename: Mapped[Optional[str]] = mapped_column(
+        String(200), nullable=True,
+        comment="Filename of the latest generated script",
+    )
+    message_count: Mapped[int] = mapped_column(
+        Integer, nullable=False, default=0,
+    )
+    ai_session_id: Mapped[Optional[uuid.UUID]] = mapped_column(
+        UUID(as_uuid=True),
+        ForeignKey("ai_sessions.id", ondelete="SET NULL"),
+        nullable=True,
+        comment="Link to FlowPilot session if launched from there",
+    )
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+    )
+
+    # Relationships
+    user: Mapped["User"] = relationship("User")
diff --git a/backend/app/schemas/script_builder.py b/backend/app/schemas/script_builder.py
new file mode 100644
index 00000000..9c74c450
--- /dev/null
+++ b/backend/app/schemas/script_builder.py
@@ -0,0 +1,69 @@
+"""Pydantic schemas for the AI Script Builder."""
+from datetime import datetime
+from typing import Any, Optional
+from uuid import UUID
+
+from pydantic import BaseModel, Field
+
+
+class ScriptBuilderCreateRequest(BaseModel):
+    """Request to start a new builder session."""
+    language: str = Field(
+        default="powershell",
+        pattern=r"^(powershell|bash|python)$",
+        description="Script language",
+    )
+
+
+class ScriptBuilderMessageRequest(BaseModel):
+    """User message in a builder session."""
+    content: str = Field(min_length=1, max_length=5000)
+
+
+class ScriptBuilderMessageResponse(BaseModel):
+    """AI response to a builder message."""
+    role: str = "assistant"
+    content: str
+    script: str | None = None
+    script_filename: str | None = None
+    line_count: int | None = None
+    timestamp: datetime
+
+    model_config = {"from_attributes": True}
+
+
+class ScriptBuilderSessionSummary(BaseModel):
+    """Lightweight session for list views (no messages)."""
+    id: UUID
+    language: str
+    title: str | None = None
+    message_count: int
+    latest_script_filename: str | None = None
+    created_at: datetime
+    updated_at: datetime
+
+    model_config = {"from_attributes": True}
+
+
+class ScriptBuilderSessionDetail(BaseModel):
+    """Full session with message history."""
+    id: UUID
+    language: str
+    title: str | None = None
+    messages: list[dict[str, Any]]
+    latest_script: str | None = None
+    latest_script_filename: str | None = None
+    message_count: int
+    ai_session_id: UUID | None = None
+    created_at: datetime
+    updated_at: datetime
+
+    model_config = {"from_attributes": True}
+
+
+class SaveToLibraryRequest(BaseModel):
+    """Request to save a generated script to the Script Library."""
+    name: str = Field(min_length=1, max_length=200)
+    description: str | None = None
+    category_id: UUID | None = None
+    share_with_team: bool = False