chore: tighten CI, Taskfile, README, CHANGELOG

CI:
- Cache ~/.local/share/ponyup keyed on release; skip the curl-pipe install
  on cache hit. Saves ~15-25s per run after the first.
- Add concurrency: cancel-in-progress on the ref so PR force-pushes
  don't stack runs.
- Pin actions/checkout to v6.0.2 (matches sibling repos in the org).
- Add an explicit `corral fetch` step before the build so a missing
  _corral/ surfaces clearly rather than as a cryptic ponyc error.

Taskfile:
- `task test` now runs `corral fetch` first; previously a fresh clone
  would fail at the ponyc step because deps weren't fetched.

CHANGELOG:
- Replace `Unreleased` with `0.1.0 - 2026-04-28` to match corral.json.

README:
- Add `ZigZag` to the "What's here" bullet list (it was named in CHANGELOG
  but missing from README).
- Reframe the install snippet as a deps-array entry rather than a full
  corral.json document; users merge it into their existing config.

Author: enilsen16

.github/workflows/ci.yml

@@ -5,18 +5,35 @@ on:
     branches: [main]
   pull_request:
 
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6.0.2
+
+      - name: Cache ponyup toolchain
+        uses: actions/cache@v4
+        with:
+          path: ~/.local/share/ponyup
+          key: ponyup-${{ runner.os }}-release-v1
+
       - name: Install ponyc + corral via ponyup
         run: |
-          sh -c "$(curl --proto '=https' --tlsv1.2 -fsSL https://raw.githubusercontent.com/ponylang/ponyup/latest-release/ponyup-init.sh)"
-          ~/.local/share/ponyup/bin/ponyup default x86_64-unknown-linux-gnu
-          ~/.local/share/ponyup/bin/ponyup update ponyc release
-          ~/.local/share/ponyup/bin/ponyup update corral release
+          if [ ! -x ~/.local/share/ponyup/bin/ponyup ]; then
+            sh -c "$(curl --proto '=https' --tlsv1.2 -fsSL https://raw.githubusercontent.com/ponylang/ponyup/latest-release/ponyup-init.sh)"
+            ~/.local/share/ponyup/bin/ponyup default x86_64-unknown-linux-gnu
+            ~/.local/share/ponyup/bin/ponyup update ponyc release
+            ~/.local/share/ponyup/bin/ponyup update corral release
+          fi
           echo "$HOME/.local/share/ponyup/bin" >> "$GITHUB_PATH"
+
+      - name: Fetch corral deps
+        run: corral fetch
+
       - name: Build + test
         run: |
           mkdir -p build

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## Unreleased
+## 0.1.0 - 2026-04-28
 
 ### Features
 

README.md

@@ -6,7 +6,8 @@ validation. The runtime that generated Pony code (emitted by
 
 ## What's here
 
-- **`Varint`** — varint encode/decode + zigzag encode/decode (i32/i64).
+- **`Varint`** — varint encode/decode (`Array[U8] iso^` ↔ `U64`).
+- **`ZigZag`** — zigzag encode/decode for signed scalars (`I32`/`I64`).
 - **`Tag`** + **`TagCodec`** — protobuf field tag (field number + wire type).
 - **`WireType`** — typed union (`WireVarint | WireFixed64 | WireLenDelim |
   WireFixed32`); proto2 group wire types are deliberately omitted.
@@ -28,14 +29,12 @@ validation. The runtime that generated Pony code (emitted by
 
 ## Install
 
+Add to your `corral.json` `deps`:
+
 ```json
 {
-  "deps": [
-    {
-      "locator": "github.com/TrogonStack/protobuf-pony",
-      "version": "0.1.0"
-    }
-  ]
+  "locator": "github.com/TrogonStack/protobuf-pony",
+  "version": "0.1.0"
 }
 ```
 

Taskfile.yml

@@ -8,6 +8,7 @@ tasks:
   test:
     desc: Build and run unit + property tests
     cmds:
+      - corral fetch
       - mkdir -p build
       - corral run -- ponyc --path . -o build test/
       - ./build/test