diff --git a/README.md b/README.md
index 06621c1..e76a042 100644
--- a/README.md
+++ b/README.md
@@ -1,23 +1,25 @@
 # atproto-devtool
 
-A developer tool for the [atproto](https://atproto.com/) ecosystem. The first
-command it ships with is `test labeler`, which runs a conformance suite against
-an atproto labeler and reports pass/fail results for identity resolution, HTTP
-endpoints, the subscription firehose, and label signature cryptography.
+A multitool for the [atproto](https://atproto.com/) developer ecosystem.
 
 ## Installation
 
-From a checkout of this repository:
+| Environment | CLI command |
+|-------------|-------------|
+| Cargo (Rust 1.85+) | `cargo install --path .` |
 
-```bash
-cargo install --path .
-```
+## Usage
+
+### `test labeler`
 
-## `test labeler`
+Runs a conformance suite against a labeler, and produces a structured report
+with per-check results plus a summary exit code. The suite has four stages:
 
-Run the labeler conformance suite against a labeler. The suite runs four stages
-in order — identity, HTTP, subscription, and crypto — and produces a structured
-report with per-check results plus a summary exit code.
+- **Identity**: DID document contains the correct entries, and the labeler's PDS
+  holds a valid labeler record.
+- **HTTP**: Checks the `com.atproto.label.queryLabels` XRPC API.
+- **Subscription**: Checks the `com.atproto.label.subscribeLabels` WebSocket.
+- **Crypto**: Samples labels and verifies their signatures.
 
 ```text
 Run the labeler conformance suite against an atproto labeler
@@ -50,7 +52,7 @@ Options:
           Print help (see a summary with '-h')
 ```
 
-### Examples
+#### Examples
 
 Resolve by handle:
 
@@ -76,8 +78,26 @@ Pass `--verbose` to any of the above to emit `DEBUG`-level tracing on stderr
 fetches, per-label verification). `NO_COLOR=1` or `--no-color` disables ANSI
 escape sequences in the rendered report.
 
-### Exit codes
+#### Exit codes
 
 - `0` — all spec-required checks passed (advisories and skipped checks are
   allowed).
 - `1` — one or more spec-required checks failed.
+- `2` — no spec-required checks failed but one or more network errors occurred.
+
+## License
+
+Licensed under either of
+
+ * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+   http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally
+submitted for inclusion in the work by you, as defined in the Apache-2.0
+license, shall be dual licensed as above, without any additional terms or
+conditions.