README.md

README.md

@@ -1,18 +1,93 @@
 # FeedReader
 
-Standalone feed fetching and parsing for RSS, Atom, and RDF feeds.
+FeedReader fetches and parses RSS, Atom, and RDF feeds into normalized Elixir
+data. It detects formats automatically, recovers from common defects in
+real-world XML, and is tested against real feeds. Bounded results and lazy event
+streams make it suitable for production workloads.
 
-## Development
+Add FeedReader to your Mix project's dependencies:
+
+```elixir
+defp deps do
+  [
+    {:feed_reader, "~> 0.1.0"}
+  ]
+end
+```
+
+Then fetch dependencies and start an interactive Elixir session:
 
 ```sh
-mix test
-mix format --check-formatted
-mix compile --warnings-as-errors
+mix deps.get
+iex -S mix
+```
+
+Try parsing a feed in IEx:
+
+```elixir
+xml = """
+<rss version="2.0">
+  <channel>
+    <title>Example</title>
+    <item><title>First item</title><guid>one</guid></item>
+  </channel>
+</rss>
+"""
+
+{:ok, result} = FeedReader.parse_binary(xml, max_items: 100)
+result.feed.title
+#=> "Example"
+
+Enum.map(result.items, & &1.title)
+#=> ["First item"]
+```
+
+## Fetch a remote feed
+
+Use `fetch_and_parse/2` to download and collect a feed. Set `:max_items` to a
+positive limit to bound the number of retained items.
+
+```elixir
+{:ok, result} =
+  FeedReader.fetch_and_parse("https://example.com/feed.xml", max_items: 1_000)
+
+result.feed
+result.items
+```
+
+## Stream feed events
+
+For large feeds, `stream/2` returns feed metadata and items as a lazy event
+stream. Fully consuming the stream cleans up its downloaded temporary file. If
+enumeration may stop early, close the session in an `after` block:
+
+```elixir
+{:ok, session} = FeedReader.stream("https://example.com/feed.xml")
+
+try do
+  session.events
+  |> Enum.take(10)
+  |> Enum.each(&IO.inspect/1)
+after
+  FeedReader.close(session)
+end
+```
+
+Local feeds can be streamed with `stream_file/2`; the source file remains owned
+by the caller. See the `FeedReader` module documentation for parsing options,
+verified parsing, and format customization.
+
+## How to contribute
+
+Install [Elixir](https://elixir-lang.org/install.html) 1.20.4 with Erlang/OTP
+29.1.2, as specified in `.tool-versions`. Then fetch dependencies and run the
+project checks:
+
+```sh
+mix deps.get
+mix precommit
 mix credo --strict
 ```
 
-Run the complete development checks with:
-
-```sh
-mix precommit
-```
+Create a branch for your change and submit it as a pull request. `mix precommit`
+compiles with warnings treated as errors, checks formatting, and runs the tests.