diff --git a/.gitignore b/.gitignore
index a95a0c8..7466564 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,3 +17,7 @@
 !webclient/dist/
 *.egg-info/
 webclient/node_modules/
+
+# Local runtime artifacts
+.codex
+*.db
diff --git a/docs/index.md b/docs/index.md
index 2f7ebd8..9a7bf11 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -49,6 +49,6 @@
 - **Web framework**: FastAPI + uvicorn
 - **LLM**: Ollama (primary), OpenAI-compatible backend wired in
 - **Default model**: `gemma4:31b-cloud` (configurable per profile)
-- **Database**: SQLite via aiosqlite
+- **Database**: PostgreSQL via asyncpg
 - **Logging**: structlog
 - **Config**: pydantic-settings (reads `.env`)
diff --git a/docs/memory.md b/docs/memory.md
index be818d8..9f9a0ef 100644
--- a/docs/memory.md
+++ b/docs/memory.md
@@ -68,7 +68,7 @@
 | `memory_summary` | Single-row narrative summary generated from all facts |
 | `session_memory_state` | Tracks which sessions have been processed (by `extracted_at`) |
 
-`MemoryStore` is initialized synchronously (creates tables), all operations are async via asyncpg (PostgreSQL) or aiosqlite (SQLite fallback).
+`MemoryStore` is initialized synchronously (creates tables), all operations are async via asyncpg (PostgreSQL).
 
 ### Key operations
 
diff --git a/docs/sessions.md b/docs/sessions.md
index e0411db..afba2bf 100644
--- a/docs/sessions.md
+++ b/docs/sessions.md
@@ -47,8 +47,8 @@
 ### `InMemorySessionStore`
 Simple dict-backed store for testing.
 
-### `SQLiteSessionStore` (`navi/core/sqlite_session_store.py`)
-Production store backed by SQLite via aiosqlite.
+### `PgSessionStore` (`navi/core/pg_session_store.py`)
+Production store backed by PostgreSQL via asyncpg.
 
 - `create(profile_id)` → new `Session`
 - `get(session_id)` → `Session | None`
@@ -58,7 +58,7 @@
 - `set_pinned(session_id, pinned)` → `bool`
 - `set_name(session_id, name)` → `bool`
 
-DB path: `settings.db_path` (default: `navi.db`).
+Requires `DATABASE_URL` env variable (e.g. `postgresql://user:pass@localhost/navi`).
 
 ---
 
diff --git a/navi/profiles/tool_developer/system_prompt.txt b/navi/profiles/tool_developer/system_prompt.txt
index 0896a34..d10f01c 100644
--- a/navi/profiles/tool_developer/system_prompt.txt
+++ b/navi/profiles/tool_developer/system_prompt.txt
@@ -119,5 +119,5 @@
 ## Available imports
 
 Standard library: anything in Python stdlib.
-Third-party (installed): `httpx`, `aiosqlite`, `asyncpg`, `structlog`, `pydantic`.
+Third-party (installed): `httpx`, `asyncpg`, `structlog`, `pydantic`.
 Prefer stdlib and httpx to keep dependencies minimal.
diff --git a/webclient/docs/architecture.md b/webclient/docs/architecture.md
index 00c79a3..2458bc9 100644
--- a/webclient/docs/architecture.md
+++ b/webclient/docs/architecture.md
@@ -7,7 +7,7 @@
 - **Framework**: FastAPI + uvicorn
 - **LLM**: Ollama (local), model `gemma4:26b-a4b-it-q4_K_M` (26B params, 4-bit quant)
 - **Thinking**: Model reasoning is enabled and streamed (`OLLAMA_THINK=true`)
-- **Database**: PostgreSQL (primary) or SQLite fallback, via asyncpg / aiosqlite
+- **Database**: PostgreSQL via asyncpg
 - **Context window**: 65 536 tokens
 
 ## Component overview
@@ -33,7 +33,7 @@
                  ├── LLM backend (Ollama)
                  ├── ToolRegistry  (built-ins + user tools from tools/)
                  ├── ProfileRegistry  (loaded from navi/profiles/*/config.json)
-                 └── SessionStore  (PostgreSQL or SQLite)
+                 └── SessionStore  (PostgreSQL)
                       └── MemoryStore  (long-term user facts, same DB)
 ```