Initial import with skill sheet working

node_modules/level-supports/index.d.ts

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+/**
+ * Given zero or more manifest objects, returns a merged and enriched manifest object
+ * that has truthy properties for each of the features listed in {@link IManifest}.
+ *
+ * @param manifests Partial manifest(s) to merge.
+ */
+export function supports (...manifests: Array<Partial<IManifest>>): IManifest
+
+/**
+ * Describes the abilities of an
+ * [`abstract-level`](https://github.com/Level/abstract-level) database. Support matrices
+ * for known `abstract-level` implementations can be found in
+ * [`level-supports`](https://github.com/Level/supports#features).
+ */
+export interface IManifest {
+  /**
+   * Does the database have snapshot guarantees? Meaning that reads are unaffected by
+   * simultaneous writes. For example, an iterator should read from a snapshot of the
+   * database, created at the time `db.iterator()` was called. This means the iterator
+   * will not see the data of simultaneous write operations.
+   */
+  snapshots: boolean
+
+  /**
+   * Does data survive after process (or environment) exit?
+   */
+  permanence: boolean
+
+  /**
+   * Do iterators support
+   * [`seek(..)`](https://github.com/Level/abstract-level/#iteratorseektarget-options)?
+   */
+  seek: boolean
+
+  /**
+   * Does the database support `db.clear()`? Always true since `abstract-level@1`.
+   */
+  clear: boolean
+
+  /**
+   * Does the database support `db.getMany()`? Always true since `abstract-level@1`.
+   */
+  getMany: boolean
+
+  /**
+   * Does the database have a `keys([options])` method that returns a key iterator?
+   * Always true since `abstract-level@1`.
+   */
+  keyIterator: boolean
+
+  /**
+   * Does the database have a `values([options])` method that returns a key iterator?
+   * Always true since `abstract-level@1`.
+   */
+  valueIterator: boolean
+
+  /**
+   * Do iterators have a `nextv(size[, options][, callback])` method? Always true since
+   * `abstract-level@1`.
+   */
+  iteratorNextv: boolean
+
+  /**
+   * Do iterators have a `all([options][, callback])` method? Always true since
+   * `abstract-level@1`.
+   */
+  iteratorAll: boolean
+
+  /**
+   * Does the database have a
+   * [`status`](https://github.com/Level/abstract-level/#dbstatus) property? Always true
+   * since `abstract-level@1`.
+   */
+  status: boolean
+
+  /**
+   * Does `db.open()` and the database constructor support this option?
+   */
+  createIfMissing: boolean
+
+  /**
+   * Does `db.open()` and the database constructor support this option?
+   */
+  errorIfExists: boolean
+
+  /**
+   * Can operations like `db.put()` be called without explicitly opening the db? Like so:
+   *
+   * ```js
+   * const db = new Level()
+   * await db.put('key', 'value')
+   * ```
+   *
+   * Always true since `abstract-level@1`.
+   */
+  deferredOpen: boolean
+
+  /**
+   * Do all database methods (that don't otherwise have a return value) support promises,
+   * in addition to callbacks? Such that, when a callback argument is omitted, a promise
+   * is returned:
+   *
+   * ```js
+   * db.put('key', 'value', callback)
+   * await db.put('key', 'value')
+   * ```
+   *
+   * Always true since `abstract-level@1`.
+   */
+  promises: boolean
+
+  /**
+   * Does database have the methods `createReadStream`, `createKeyStream` and
+   * `createValueStream`, following the API documented in `levelup`? For `abstract-level`
+   * databases, a standalone module called
+   * [`level-read-stream`](https://github.com/Level/read-stream) is available.
+   */
+  streams: boolean
+
+  /**
+   * Which encodings (by name) does the database support, as indicated by nested
+   * properties? For example:
+   *
+   * ```js
+   * { utf8: true, json: true }
+   * ```
+   */
+  encodings: Record<string, boolean>
+
+  /**
+   * Which events does the database emit, as indicated by nested properties? For example:
+   *
+   * ```js
+   * if (db.supports.events.put) {
+   *   db.on('put', listener)
+   * }
+   * ```
+   */
+  events: Record<string, boolean>
+
+  /**
+   * Declares support of additional methods, that are not part of the `abstract-level`
+   * interface. In the form of:
+   *
+   * ```js
+   * {
+   *   foo: true,
+   *   bar: true
+   * }
+   * ```
+   *
+   * Which says the db has two methods, `foo` and `bar`. It might be used like so:
+   *
+   * ```js
+   * if (db.supports.additionalMethods.foo) {
+   *   db.foo()
+   * }
+   * ```
+   */
+  additionalMethods: Record<string, boolean>
+}