diff --git a/README.md b/README.md
index 0337c972..6b160b47 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,114 @@
 # ODF Validator
 
-Latest version is 0.20-beta-1.
+Validates OpenDocument Format documents against the OASIS ODF specifications, v1.0 to v1.4. Optionally applies the [OPF Spreadsheets Preservation Specification](https://github.com/openpreserve/sheets-preservation-spec) as a policy profile.
 
-The project website is available here: <http://odf.openpreservation.org/>.
+Project website: <http://odf.openpreservation.org/>
 
-## Getting the software
+## Install
 
-See instructions on the project website: <http://odf.openpreservation.org/#installation>
+Download from the [v0.20-beta-1 release](https://github.com/openpreserve/odf-validator/releases/tag/v0.20-beta-1).
 
-## About
+| Platform | Asset | Runtime |
+| --- | --- | --- |
+| Linux | `odf-validator-0.20-beta-1-linux` | none |
+| macOS (Apple Silicon) | `odf-validator-0.20-beta-1-mac` | none |
+| Windows | `odf-validator-0.20-beta-1-windows.exe` | none |
+| Any | `odf-validator-0.20-beta-1-all.jar` | Java 11+ |
 
-[Open Preservation Foundation](https://openpreservation.org/)'s OpenDocument Format Validator (OPF ODF Validator) enables your organisation to validate the file format standard. Additionally, it supports a set of file format policy rules created for improving the preservation effort of OpenDocument Format spreadsheet files.
+```shell
+chmod +x odf-validator-0.20-beta-1-linux
+./odf-validator-0.20-beta-1-linux --version
+```
+
+```shell
+java -jar odf-validator-0.20-beta-1-all.jar --version
+```
+
+Every release so far is flagged pre-release, so `/releases/latest` resolves to nothing. Use the tagged URL above.
+
+## Usage
+
+```shell
+odf-validator [-dehVv] [-o=<outputFormat>] [[-f=<format>] | -p] FILE...
+```
+
+| Option | Effect |
+| --- | --- |
+| `-f`, `--format=<format>` | Validate as one format only. Takes an extension, MIME type or document element name, e.g. `spreadsheet`. |
+| `-p`, `--profile` | Add the Spreadsheets Preservation Specification checks. Forces spreadsheet, so cannot be combined with `-f`. |
+| `-e`, `--extended` | Extended document validation. |
+| `-o`, `--output=<format>` | `TEXT` (default), `JSON` or `XML`. |
+| `-d`, `--debug` | Debug output. |
+| `-v`, `-vv`, `-vvv` | Increase verbosity. |
+
+Exit code is `0` when the document passes, `1` when a check fails.
+
+A document that passes:
+
+```text
+$ odf-validator dsigs-valid.ods
+APP-1: [INFO] Validating dsigs-valid.ods.
+APP-4: [INFO] Validation report for dsigs-valid.ods.
+DOC-2: [INFO] package OpenDocument version 1.3 detected.
+DOC-3: [INFO] mimetype OpenDocument MIMETYPE application/vnd.oasis.opendocument.spreadsheet detected
+VALID, no errors, no warnings and 2 info message found.
+```
+
+One that does not:
+
+```text
+$ odf-validator bad_dsig_name.ods
+APP-1: [INFO] Validating bad_dsig_name.ods.
+APP-4: [INFO] Validation report for bad_dsig_name.ods.
+DOC-2: [INFO] package OpenDocument version 1.3 detected.
+DOC-3: [INFO] mimetype OpenDocument MIMETYPE application/vnd.oasis.opendocument.spreadsheet detected
+PKG-5: [ERROR] META-INF/notsigs.xml An OpenDocument Package SHALL only contain the 'META-INF/manifest.xml' and files containg the term 'signatures' in their name in the 'META-INF' folder. File META-INF/notsigs.xml does not meet this criteria.
+NOT VALID, 1 errors, 0 warnings and 2 info messages.
+```
+
+Every check id is documented: [validation checks](docs/validation/index.md), [policy checks](docs/policies/index.md), [detection detail](docs/detection/index.md). Further examples in [usage](docs/usage/index.md).
+
+## Build
+
+JDK 11 or newer, Maven 3.4 or newer.
+
+```shell
+git clone https://github.com/openpreserve/odf-validator.git
+cd odf-validator
+mvn clean package
+```
+
+Launcher scripts are written to the project root:
+
+```shell
+./odf-validator --help      # Linux, macOS
+odf-validator.bat --help    # Windows
+```
+
+Note that `mvn validate` regenerates this README, the launcher scripts and the `docs/` pages from `src/main/resources/org/openpreservation/odf/{docs,batch}`. Edit the templates there, never the generated copies.
+
+## Library
+
+```xml
+<dependency>
+  <groupId>org.openpreservation.odf</groupId>
+  <artifactId>odf-core</artifactId>
+  <version>0.20-beta-1</version>
+</dependency>
+```
+
+```java
+OdfValidator validator = OdfValidators.getOdfValidator();
+ValidationReport report = validator.validate(Path.of("package.ods"));
+for (Check check : report.getChecks()) {
+    System.out.printf("%s %s %s%n", check.getMessage().getId(),
+                                    check.getMessage().getSeverity(),
+                                    check.getMessage().getText());
+}
+```
+
+[Developer docs](docs/developer/index.md) cover package parsing, the spreadsheet profile and JSON/XML report serialisation. [Javadoc](http://odf.openpreservation.org/site/apidocs/index.html).
+
+## Licence
+
+BSD 3-Clause, see [LICENSE](LICENSE).
diff --git a/src/main/resources/org/openpreservation/odf/docs/README.md b/src/main/resources/org/openpreservation/odf/docs/README.md
index 684d0409..820353ad 100644
--- a/src/main/resources/org/openpreservation/odf/docs/README.md
+++ b/src/main/resources/org/openpreservation/odf/docs/README.md
@@ -1,13 +1,114 @@
 # ODF Validator
 
-Latest version is ${project.version}.
+Validates OpenDocument Format documents against the OASIS ODF specifications, v1.0 to v1.4. Optionally applies the [OPF Spreadsheets Preservation Specification](https://github.com/openpreserve/sheets-preservation-spec) as a policy profile.
 
-The project website is available here: <http://odf.openpreservation.org/>.
+Project website: <http://odf.openpreservation.org/>
 
-## Getting the software
+## Install
 
-See instructions on the project website: <http://odf.openpreservation.org/#installation>
+Download from the [v${project.version} release](https://github.com/openpreserve/odf-validator/releases/tag/v${project.version}).
 
-## About
+| Platform | Asset | Runtime |
+| --- | --- | --- |
+| Linux | `odf-validator-${project.version}-linux` | none |
+| macOS (Apple Silicon) | `odf-validator-${project.version}-mac` | none |
+| Windows | `odf-validator-${project.version}-windows.exe` | none |
+| Any | `odf-validator-${project.version}-all.jar` | Java 11+ |
 
-[Open Preservation Foundation](https://openpreservation.org/)'s OpenDocument Format Validator (OPF ODF Validator) enables your organisation to validate the file format standard. Additionally, it supports a set of file format policy rules created for improving the preservation effort of OpenDocument Format spreadsheet files.
+```shell
+chmod +x odf-validator-${project.version}-linux
+./odf-validator-${project.version}-linux --version
+```
+
+```shell
+java -jar odf-validator-${project.version}-all.jar --version
+```
+
+Every release so far is flagged pre-release, so `/releases/latest` resolves to nothing. Use the tagged URL above.
+
+## Usage
+
+```shell
+odf-validator [-dehVv] [-o=<outputFormat>] [[-f=<format>] | -p] FILE...
+```
+
+| Option | Effect |
+| --- | --- |
+| `-f`, `--format=<format>` | Validate as one format only. Takes an extension, MIME type or document element name, e.g. `spreadsheet`. |
+| `-p`, `--profile` | Add the Spreadsheets Preservation Specification checks. Forces spreadsheet, so cannot be combined with `-f`. |
+| `-e`, `--extended` | Extended document validation. |
+| `-o`, `--output=<format>` | `TEXT` (default), `JSON` or `XML`. |
+| `-d`, `--debug` | Debug output. |
+| `-v`, `-vv`, `-vvv` | Increase verbosity. |
+
+Exit code is `0` when the document passes, `1` when a check fails.
+
+A document that passes:
+
+```text
+$ odf-validator dsigs-valid.ods
+APP-1: [INFO] Validating dsigs-valid.ods.
+APP-4: [INFO] Validation report for dsigs-valid.ods.
+DOC-2: [INFO] package OpenDocument version 1.3 detected.
+DOC-3: [INFO] mimetype OpenDocument MIMETYPE application/vnd.oasis.opendocument.spreadsheet detected
+VALID, no errors, no warnings and 2 info message found.
+```
+
+One that does not:
+
+```text
+$ odf-validator bad_dsig_name.ods
+APP-1: [INFO] Validating bad_dsig_name.ods.
+APP-4: [INFO] Validation report for bad_dsig_name.ods.
+DOC-2: [INFO] package OpenDocument version 1.3 detected.
+DOC-3: [INFO] mimetype OpenDocument MIMETYPE application/vnd.oasis.opendocument.spreadsheet detected
+PKG-5: [ERROR] META-INF/notsigs.xml An OpenDocument Package SHALL only contain the 'META-INF/manifest.xml' and files containg the term 'signatures' in their name in the 'META-INF' folder. File META-INF/notsigs.xml does not meet this criteria.
+NOT VALID, 1 errors, 0 warnings and 2 info messages.
+```
+
+Every check id is documented: [validation checks](docs/validation/index.md), [policy checks](docs/policies/index.md), [detection detail](docs/detection/index.md). Further examples in [usage](docs/usage/index.md).
+
+## Build
+
+JDK 11 or newer, Maven 3.4 or newer.
+
+```shell
+git clone https://github.com/openpreserve/odf-validator.git
+cd odf-validator
+mvn clean package
+```
+
+Launcher scripts are written to the project root:
+
+```shell
+./odf-validator --help      # Linux, macOS
+odf-validator.bat --help    # Windows
+```
+
+Note that `mvn validate` regenerates this README, the launcher scripts and the `docs/` pages from `src/main/resources/org/openpreservation/odf/{docs,batch}`. Edit the templates there, never the generated copies.
+
+## Library
+
+```xml
+<dependency>
+  <groupId>org.openpreservation.odf</groupId>
+  <artifactId>odf-core</artifactId>
+  <version>${project.version}</version>
+</dependency>
+```
+
+```java
+OdfValidator validator = OdfValidators.getOdfValidator();
+ValidationReport report = validator.validate(Path.of("package.ods"));
+for (Check check : report.getChecks()) {
+    System.out.printf("%s %s %s%n", check.getMessage().getId(),
+                                    check.getMessage().getSeverity(),
+                                    check.getMessage().getText());
+}
+```
+
+[Developer docs](docs/developer/index.md) cover package parsing, the spreadsheet profile and JSON/XML report serialisation. [Javadoc](http://odf.openpreservation.org/site/apidocs/index.html).
+
+## Licence
+
+BSD 3-Clause, see [LICENSE](LICENSE).