Pablan, as it stands

Self-hosted knowledge management for SMEs: a split-screen Markdown editor
whose sections an LLM refines while you write, and RAG question answering
over the documents that result. FastAPI + Postgres/pgvector on the back,
SvelteKit on the front, everything OpenAI-compatible and self-hostable.

Squashed into a single commit; the development history stays local.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CA43ZJda8Rbp2hKXNy8f6b

backend/alembic/versions/a71e3c92fd45_llm_settings_provenance.py

@@ -0,0 +1,52 @@
+"""llm settings field provenance
+
+Revision ID: a71e3c92fd45
+Revises: 9f4a71c60d38
+Create Date: 2026-07-20 18:07:44.902113
+
+"""
+
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = "a71e3c92fd45"
+down_revision: Union[str, Sequence[str], None] = "9f4a71c60d38"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+_FIELDS = ("base_url", "model", "api_key")
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # The table changed meaning: it used to hold sparse per-field overrides
+    # on top of the environment, and now holds the full configuration,
+    # seeded from the environment once at first start.
+    for field in _FIELDS:
+        op.add_column(
+            "llm_settings",
+            sa.Column(
+                f"{field}_from_env",
+                sa.Boolean(),
+                server_default=sa.false(),
+                nullable=False,
+            ),
+        )
+
+    # The table changed meaning: it used to hold sparse per-field overrides
+    # on top of the environment, and now holds the full configuration,
+    # seeded from the environment at startup. Pre-existing rows are dev
+    # leftovers — nothing is in production yet, so they are dropped rather
+    # than translated, and `bootstrap_llm_settings()` recreates them from
+    # `.env` on the next start.
+    op.execute("DELETE FROM llm_settings")
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    for field in _FIELDS:
+        op.drop_column("llm_settings", f"{field}_from_env")