feat(hermes): fast dev build mode

README.md

@@ -31,6 +31,14 @@ sandboxed execution of modular applications.
 
 3. **Build and run everything**:
 
+   For development (fast, recommended):
+
+   ```bash
+   just build-run-dev
+   ```
+
+   For production (full assets, slower):
+
    ```bash
    just build-run-all
    ```
@@ -46,8 +54,16 @@ or `just --show <command>` to see detailed documentation for any specific comman
 
 ## Key Commands
 
-* `just build-run-all` - Complete workflow (recommended for first-time users)
+### Build & Run
+
+* `just build-run-dev` - **Development build** (~2-5 min, recommended for daily development)
+* `just build-run-all` - **Production build** (~5-15 min, includes all web assets)
+* `just dev-athena-fast` - Quick WASM rebuild for development iteration
+
+### Utilities
+
 * `just status` - Show current build status and configuration
+* `just clean-hfs` - Clean up previous application state
 * `just --help` - Just command help
 
 For everything else - architecture, prerequisites, configuration,

hermes/apps/athena/manifest_app.json

@@ -26,4 +26,4 @@
     }
   ],
   "www": "modules/http-proxy/lib/www"
-}
+}

hermes/apps/athena/modules/http-proxy/Earthfile

@@ -9,6 +9,30 @@ build-http-proxy:
 
 
 
+# Common base for HTTP Proxy builds
+# ==================================
+# Sets up common files and directory structure used by both production and dev builds.
+# This eliminates duplication between local-build-http-proxy and local-build-http-proxy-dev.
+http-proxy-base:
+    FROM alpine
+    COPY +build-http-proxy/http_proxy.wasm .
+
+    # Copy module configuration and metadata files
+    COPY lib/config.schema.json .
+    COPY lib/manifest_module.json .
+    COPY lib/metadata.json .
+    COPY lib/settings.schema.json .
+
+    # Create the missing config.json file (empty JSON object)
+    RUN echo '{}' > config.json
+
+    # Create staging directory structure
+    RUN mkdir -p /staging/www
+
+    # Copy WASM module and JSON config files to root of staging
+    RUN cp http_proxy.wasm /staging/
+    RUN cp *.json /staging/ || true
+
 # HTTP Proxy WASM Module Build
 # =============================
 # Compiles the HTTP proxy Rust code into a WebAssembly module using the wasm32-wasip2 target.
@@ -26,28 +50,11 @@ build-http-proxy:
 # Output: http_proxy.wasm - Executable WebAssembly module
 # Duration: ~3-5 minutes (Rust compilation to WASM)
 local-build-http-proxy:
-    FROM alpine
-    COPY +build-http-proxy/http_proxy.wasm .
-
-    # Copy module configuration and metadata files
-    COPY lib/config.schema.json .
-    COPY lib/manifest_module.json .
-    COPY lib/metadata.json .
-    COPY lib/settings.schema.json .
-
-    # Create the missing config.json file (empty JSON object)
-    RUN echo '{}' > config.json
+    FROM +http-proxy-base
 
     # Download web assets directly to root level
     COPY github.com/input-output-hk/catalyst-voices/catalyst_voices+build-web/web .
 
-    # Create staging directory structure
-    RUN mkdir -p /staging/www
-
-    # Copy WASM module and JSON config files to root of staging
-    RUN cp http_proxy.wasm /staging/
-    RUN cp *.json /staging/ || true
-
     # Copy web assets to www subdirectory
     RUN cp -r assets /staging/www/ || true
     RUN cp -r canvaskit /staging/www/ || true
@@ -57,4 +64,31 @@ local-build-http-proxy:
     RUN find . -maxdepth 1 -type f -exec cp {} /staging/www/ \; 2>/dev/null || echo "⚠️  Some files may not have been copied"
 
     # Export build artifacts from staging directory
-    SAVE ARTIFACT /staging AS LOCAL lib
+    SAVE ARTIFACT /staging AS LOCAL lib
+
+# Development build - faster version without heavy web assets
+# ============================================================
+# This target skips the large web assets (assets, canvaskit, icons) that take
+# a long time to download and compress. Use this for development iterations
+# where you don't need all the web assets.
+#
+# What's included:
+#   - WASM module (http_proxy.wasm)
+#   - JSON configuration files
+#   - Essential files only
+#
+# What's skipped:
+#   - Large web assets (assets/, canvaskit/, icons/)
+#   - Full catalyst_voices web build
+#
+local-build-http-proxy-dev:
+    FROM +http-proxy-base
+
+    # For dev: Create minimal placeholder assets instead of copying large ones
+    RUN mkdir -p /staging/www/assets /staging/www/canvaskit /staging/www/icons
+    RUN echo '{"dev": "placeholder"}' > /staging/www/assets/placeholder.json
+    RUN echo '{"dev": "placeholder"}' > /staging/www/canvaskit/placeholder.json
+    RUN echo '{"dev": "placeholder"}' > /staging/www/icons/placeholder.json
+
+    # Export build artifacts from staging directory
+    SAVE ARTIFACT /staging AS LOCAL lib

hermes/apps/athena/modules/http-proxy/lib/manifest.json

@@ -1,23 +1,23 @@
 {
-  "name": "Catalyst Voices",
-  "short_name": "Catalyst Voices",
-  "start_url": ".",
-  "display": "standalone",
-  "background_color": "#0175C2",
-  "theme_color": "#0175C2",
-  "description": "Catalyst Voices",
-  "orientation": "portrait-primary",
-  "prefer_related_applications": false,
-  "icons": [
-    {
-      "src": "icons/Icon-192.png",
-      "sizes": "192x192",
-      "type": "image/png"
-    },
-    {
-      "src": "icons/Icon-512.png",
-      "sizes": "512x512",
-      "type": "image/png"
-    }
-  ]
+    "name": "Catalyst Voices",
+    "short_name": "Catalyst Voices",
+    "start_url": ".",
+    "display": "standalone",
+    "background_color": "#0175C2",
+    "theme_color": "#0175C2",
+    "description": "Catalyst Voices",
+    "orientation": "portrait-primary",
+    "prefer_related_applications": false,
+    "icons": [
+        {
+            "src": "icons/Icon-192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "icons/Icon-512.png",
+            "sizes": "512x512",
+            "type": "image/png"
+        }
+    ]
 }

hermes/bin/src/hdf5/file.rs

@@ -1,6 +1,7 @@
 //! A Hermes HDF5 file abstraction over the HDF5 dataset object.
 
 use super::Path;
+use crate::hdf5::compression::enable_compression;
 
 /// Hermes HDF5 file object, wrapper of `hdf5::Dataset`
 pub(crate) struct File {
@@ -45,13 +46,10 @@ impl File {
     ) -> anyhow::Result<Self> {
         let builder = group.new_dataset_builder();
         let shape = hdf5::SimpleExtents::resizable([0]);
-        // COMPRESSION DISABLED: For faster development builds
-        // To re-enable compression, uncomment the lines below and comment out the builder line:
-        // let hdf5_ds = enable_compression(builder)
-        //     .empty::<u8>()
-        //     .shape(shape)
-        //     .create(file_name)?;
-        let hdf5_ds = builder.empty::<u8>().shape(shape).create(file_name)?;
+        let hdf5_ds = enable_compression(builder)
+            .empty::<u8>()
+            .shape(shape)
+            .create(file_name)?;
         Ok(Self { hdf5_ds, pos: 0 })
     }