Skill: liuhao6741/agt0 (version 1.0.1)

--- name: agt0 description: Local-first agent storage — SQLite database, virtual filesystem, and memory in one .db file. Use when persisting agent state, querying CSV/JSONL/logs with SQL, or using fs_read/fs_write via the agt0 CLI or Node API. --- # agt0 — Agent Storage Skill > **One file. All your agent needs.** > Local-first database + filesystem + memory in a single SQLite file. You are using **agt0** to persist data. Follow this reference precisely. --- ## Setup ```bash npm install -g @seekcontext/agt0 agt0 init <dbname> agt0 use <dbname> # set as default (omit db name in later commands) ``` After `agt0 use`, you can omit `<db>` from all commands below. --- ## Essential Patterns ### Store and retrieve data (SQL) ```bash # Inline SQL agt0 sql -q "CREATE TABLE tasks (id INTEGER PRIMARY KEY, title TEXT, status TEXT)" agt0 sql -q "INSERT INTO tasks (title, status) VALUES ('Build API', 'doing')" agt0 sql -q "SELECT * FROM tasks WHERE status = 'doing'" # Execute SQL file agt0 sql -f schema.sql ``` ### Store and retrieve files (CLI) ```bash agt0 fs put ./data.csv myapp:/data/data.csv # upload file agt0 fs put -r ./src myapp:/src # upload directory agt0 fs cat myapp:/data/data.csv # read file agt0 fs ls myapp:/data/ # list directory agt0 fs get myapp:/data/data.csv ./local.csv # download file agt0 fs rm myapp:/data/old.csv # delete file agt0 fs mkdir myapp:/data/exports # create directory ``` ### Store and retrieve files (SQL) ```sql SELECT fs_write('/memory/context.md', 'User prefers dark mode'); SELECT fs_read('/memory/context.md'); SELECT fs_append('/logs/session.log', 'Step completed' || char(10)); SELECT fs_exists('/config.json'); -- 1 or 0 SELECT fs_size('/config.json'); -- bytes ``` ### Query files as tables (zero-import) ```sql -- CSV → queryable rows (each row is JSON in _data column) SELECT json_extract(_data, '$.name') AS name, json_extract(_data, '$.email') AS email FROM fs_csv('/data/users.csv') WHERE json_extract(_data, '$.role') = 'admin'; -- JSONL structured logs SELECT json_extract(line, '$.level') AS level, COUNT(*) FROM fs_jsonl('/logs/app.jsonl') GROUP BY level; -- Grep across text files SELECT _path, _line_number, line FROM fs_text('/src/**/*.ts') WHERE line LIKE '%TODO%'; -- Directory listing SELECT path, type, size, mtime FROM fs_list('/data/'); ``` ### CSV / JSONL with real columns (virtual tables; single file only) Use **`CREATE VIRTUAL TABLE ... USING csv_expand(...)`** / **`tsv_expand`** / **`jsonl_expand`** when you want **native column names** instead of `json_extract(_data, ...)`. **No globs** — one path per `CREATE`. For `**/*.csv` patterns, keep using `fs_csv` / `fs_jsonl`. ```sql CREATE VIRTUAL TABLE v_users USING csv_expand('/data/users.csv'); SELECT name, email FROM v_users WHERE role = 'admin'; CREATE VIRTUAL TABLE v_logs USING jsonl_expand('/logs/app.jsonl'); SELECT level, msg FROM v_logs WHERE level = 'error'; ``` Schema is fixed at `CREATE` time; `DROP` and recreate if the file layout changes. JSONL columns = sorted union of object keys from the first `AGT0_FS_EXPAND_JSONL_SCAN_LINES` non-empty lines (default `256`). Optional 2nd arg: same JSON as TVFs (`strict`, `delimiter`, `header`, etc.). **`agt0 sql` (CLI only):** for a **literal single-file path** (no globs), `fs_csv` / `fs_tsv` / `fs_jsonl` are **auto-rewritten** so `SELECT *` returns real columns. Set `AGT0_SQL_FS_EXPAND=0` to disable. In Node, call `expandFsTableSql(sql, db)` from the package if you need the same rewrite. ### Import file data into tables ```sql INSERT INTO users (name, email) SELECT DISTINCT json_extract(_data, '$.name'), json_extract(_data, '$.email') FROM fs_csv('/data/users.csv') WHERE json_extract(_data, '$.email') IS NOT NULL; ``` --- ## Complete SQL Function Reference ### Scalar Functions | Function | Returns | Description | |---|---|---| | `fs_read(path)` | TEXT | Read file content as text | | `fs_write(path, content)` | INTEGER | Write/overwrite file, returns bytes | | `fs_append(path, data)` | INTEGER | Append to file, returns total bytes | | `fs_exists(path)` | INTEGER | 1 if path exists, 0 otherwise | | `fs_size(path)` | INTEGER | File size in bytes | | `fs_mtime(path)` | TEXT | Last modified time (ISO 8601) | | `fs_remove(path [, recursive])` | INTEGER | Delete file/dir, returns deleted count | | `fs_mkdir(path [, recursive])` | INTEGER | Create directory (1=recursive) | | `fs_truncate(path, size)` | INTEGER | Truncate to byte size | | `fs_read_at(path, offset, length)` | TEXT | Read byte range as UTF-8 | | `fs_write_at(path, offset, data)` | INTEGER | Write at byte offset (pads with NUL) | ### Table-Valued Functions | Function | Columns | Description | |---|---|---| | `fs_list(dir)` | path, type, size, mode, mtime | List directory entries | | `fs_text(path [, opts])` | _line_number, line, _path | Read text by line | | `fs_csv(path [, opts])` | _line_number, _data, _path | Read CSV (row → JSON) | | `fs_tsv(path [, opts])` | _line_number, _data, _path | Read TSV (row → JSON) | | `fs_jsonl(path [, opts])` | _line_number, line, _path | Read JSONL by line | **Virtual table modules** (dynamic columns; **single path**, no globs): | Module | Example | |---|---| | `csv_expand` | `CREATE VIRTUAL TABLE t USING csv_expand('/data/x.csv' [, opts])` | | `tsv_expand` | `CREATE VIRTUAL TABLE t USING tsv_expand('/data/x.tsv' [, opts])` | | `jsonl_expand` | `CREATE VIRTUAL TABLE t USING jsonl_expand('/logs/x.jsonl' [, opts])` | **Path globs:** `*` = one segment, `**` = any depth, `?` = one char. Example: `/logs/**/*.log`. **Options** (JSON string, 2nd arg): `exclude` (comma-separated globs), `strict` (bool — fail on bad rows), `delimiter` (string), `header` (bool). (`exclude` is ignored by `*_expand` modules.) **Limits** (env vars): `AGT0_FS_MAX_FILES`, `AGT0_FS_MAX_FILE_BYTES`, `AGT0_FS_MAX_TOTAL_BYTES`, `AGT0_FS_MAX_ROWS` (optional cap per TVF / expand scan), `AGT0_FS_PARSE_CHUNK_BYTES`, `AGT0_FS_PREVIEW_BYTES` (multi-file CSV/TSV column discovery), `AGT0_FS_EXPAND_JSONL_SCAN_LINES` (JSONL key discovery for `jsonl_expand`), `AGT0_SQL_FS_EXPAND` (CLI rewrite of literal-path `fs_*` TVFs; default on). --- ## Database Management ```bash agt0 list # list all databases agt0 inspect <db> # overview (tables, files, size) agt0 inspect <db> tables # table list with row counts agt0 inspect <db> schema # show CREATE statements agt0 dump <db> -o backup.sql # full SQL export agt0 dump <db> --ddl-only # schema only agt0 seed <db> schema.sql # run SQL file agt0 delete <db> --yes # delete database agt0 branch create <db> --name staging # branch (copy) database agt0 branch list <db> # list branches agt0 branch delete <db> --name staging # delete branch ``` --- ## Interactive Shells ### SQL REPL ```bash agt0 sql <db> ``` Type SQL ending with `;` to execute. Dot commands: `.help`, `.tables`, `.schema`, `.fshelp`, `.quit`. ### Filesystem Shell ```bash agt0 fs sh <db> ``` Commands: `ls`, `cd`, `cat`, `echo <text> > <path>`, `mkdir`, `rm`, `pwd`, `exit`, `help`. --- ## Storage Layout ``` ~/.agt0/ ├── config.json # default database setting └── databases/ ├── myapp.db # single file = tables + files + memory └── myapp-staging.db # branch ``` Override with `AGT0_HOME` env var. --- ## Critical Rules - All data is **local**. No network calls, no API keys. - Each database is a **single `.db` file**. Copy it to back up or share. - The `_fs` table is internal. **Never drop it.** - CSV rows from **`fs_csv`** are JSON in `_data` (`json_extract(_data, '$.column_name')`), or use **`csv_expand`** / **`tsv_expand`** for real columns after `CREATE VIRTUAL TABLE`. - `fs_read_at` / `fs_write_at` operate on **byte** offsets. - The SQL REPL (`.fshelp`) and the filesystem shell (`help`) are **different** interfaces with different commands. - Glob `*` matches one path segment (no `/`). Use `**` to match across directories.


Security scan verdicts — ClawScan: clean | static analysis: clean | VirusTotal: clean | SkillSpector: clean (LOW)