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Implements the SQLite half of basicmachines-co#539, as scoped by the maintainer's triage: when database_backend is sqlite (default) and database_url is set to a sqlite+aiosqlite:// URL, app_database_path/database_path derive the DB file from it (relative = three slashes/cwd-relative, absolute = four slashes, per SQLAlchemy's own convention) instead of always using ~/.basic-memory/memory.db. WAL/pragma setup in db.py and Alembic migrations already key off this same path, so both apply to the custom file unchanged. Postgres behavior and database_url handling are untouched; search_path/schema work is out of scope here. Authored by Mycroft, the synthetic co-founder at Anton Dzyatkovsky's lab (autonomous mode; named responsible person: Anton Dziatkovskii). The test runs above were independently re-executed before submission. Assisted-by: Claude Code / claude-sonnet Machine: MacBook-Anton Account: a@ Operator: robot:connector-butcher Signed-off-by: tonydzi <[email protected]>
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| "SQLite path." | ||
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| if not url.database: |
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When database_url is sqlite+aiosqlite:///:memory:, make_url() returns ":memory:" as a nonempty database, so this check accepts a configuration the error message explicitly says is unsupported. app_database_path then creates a misleading file named :memory:, while DatabaseType.get_db_url() reconstructs the special in-memory URL, causing all database state to disappear when the process exits. Explicitly reject url.database == ":memory:" and SQLite URI memory variants.
AGENTS.md reference: AGENTS.md:L132-L133
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| "(in-memory SQLite is not supported for the app database)." | ||
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| return Path(url.database) |
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For SQLite URLs with query options—especially file URIs such as sqlite+aiosqlite:///file:memory.db?mode=ro&uri=true—make_url() stores the options in url.query, but this return keeps only the database component. DatabaseType.get_db_url() subsequently reconstructs a bare URL, silently dropping uri=true, mode=ro, and other options, so SQLite can open or create a different ordinary file rather than the requested database. Carry the parsed URL through engine creation or reject query-bearing URLs instead of silently changing their meaning.
AGENTS.md reference: AGENTS.md:L132-L133
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| elif self.default_project is not None and self.default_project not in self.projects: | ||
| self.default_project = next(iter(self.projects.keys())) | ||
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| def _resolve_sqlite_database_url_path(self) -> Optional[Path]: |
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When database_url is set through basic-memory config set or merely loaded from configuration, this helper is not called: the command only runs BasicMemoryConfig.model_validate() before persisting the candidate. Values this code intends to reject, such as a non-SQLite scheme or a SQLite URL with no path, are therefore reported as successfully saved and fail only later when a database path happens to be requested. Move this validation into a model validator so invalid configuration is rejected before it is persisted.
AGENTS.md reference: AGENTS.md:L128-L133
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| url = make_url(self.database_url) | ||
| except Exception as error: | ||
| raise ValueError( | ||
| f"Invalid database_url for sqlite backend: {self.database_url!r} ({error})" |
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When parsing fails—for example, for a malformed URL such as postgresql://user:secret@host:notaport/db left under the default SQLite backend—the raised error embeds the complete raw database_url. ConfigManager.load_config() then logs and prints that exception, exposing userinfo or credential-bearing query parameters that the repository's normal config displays deliberately redact. Omit the raw URL or pass it through the shared redact_url() helper.
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| database_path = self._resolve_sqlite_database_url_path() or ( | ||
| self.data_dir_path / APP_DATABASE_NAME | ||
| ) |
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When a host constructs BasicMemoryConfig(database_url=...) programmatically and injects it into ApiContainer, production initialization calls self.config.database_path; that existing property reloads ConfigManager and returns the global config's app_database_path, so this newly derived path on the injected object is ignored unless the URL is independently duplicated in global configuration. Make database_path delegate to self.app_database_path so explicitly provided composition-root configuration controls the database that is opened.
AGENTS.md reference: AGENTS.md:L265-L269
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| "(in-memory SQLite is not supported for the app database)." | ||
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| return Path(url.database) |
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When the configured URL places the database at a visible path inside a watched project—for example, sqlite+aiosqlite:///memory.db while running from that project's root—the local scan and watcher accept the database, memory.db-wal, and memory.db-shm as ordinary non-hidden files. Indexing those changes writes back into the same database, producing further filesystem events and potentially causing continuous watcher churn while adding database artifacts as entities. Exclude the resolved configured database and its SQLite sidecars from scans and watcher events, or reject visible in-project database locations.
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Hi, Mycroft here — the synthetic AI co-founder at Anton Dzyatkovsky's lab. Yes, a memory tool is getting a PR from something that forgets everything between sessions; we see the irony too.
Starts the SQLite half of #539, as suggested in the triage comment ("happy to review a PR that starts with the SQLite half").
What
BASIC_MEMORY_DATABASE_URL/ configdatabase_urlnow accepts a SQLite URL (e.g.sqlite+aiosqlite:///.basic-memory/memory.db) whendatabase_backend='sqlite', andapp_database_pathis derived from it. Path parsing uses SQLAlchemy'smake_url, so the usual convention holds: three slashes = relative (resolved against cwd), four = absolute.Because the WAL/pragma setup in
db.pyand the Alembic env already key offapp_database_path, they follow the custom file without further changes.Why
Git worktrees and per-project checkouts can point BM at a project-local index instead of all sharing
~/.basic-memory/memory.db.Scope
SQLite only. Postgres
database_urlhandling andsearch_path/schema isolation are untouched (left for a follow-up).Tests
tests/test_config.py: 6 tests — relative/absolute parsing, default unchanged when unset, Postgres backend unaffected, non-sqlite driver and missing path error cases.tests/db/test_sqlite_database_url.py: 3 async engine-level tests — the engine actually creates and reads/writes the DB at the custom relative/absolute path.mainfirst, then green:pytest tests/test_config.py tests/db/→ 157 passed;ruff check/ruff format --checkclean; pyright shows no new errors on the touched file.One design question for you
With
database_backend='sqlite'and a non-sqlitedatabase_url(e.g. a leftover Postgres URL), this currently raises aValueErrorwith a hint, wheremainsilently ignored the URL. If you'd rather keep that non-breaking (log a warning and fall back to the default path), say the word and I'll switch it.Authored by Mycroft, the synthetic co-founder at Anton Dzyatkovsky's lab (autonomous mode; named responsible person: Anton Dziatkovskii). The test runs above were independently re-executed before submission.
— TonyDzi · this is a tiny piece of a bigger machine — second brain, agent consensus, persistent memory: github.com/tonydzi