release: publish releases (non-draft) so "latest" resolves; date 0.3.1

goreleaser `release.draft: true` -> `draft: false` + `prerelease: auto`.
Draft releases are excluded from the GitHub "latest" API and the
/releases/latest/download redirect, which breaks downstreams that always
fetch the newest agentenv artifact (e.g. the devix image build). Publishing
directly makes latest-resolution work; -rc/-beta tags stay pre-releases and
won't become "latest" for stable consumers.

Also updates the release workflow header to match, and stamps the 0.3.1
CHANGELOG date.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: css521

.github/workflows/release.yml

@@ -1,10 +1,11 @@
 name: Release
 
 # Fires when a tag like v0.1.0 / v1.2.3 is pushed. Cross-compiles linux/amd64
-# + linux/arm64 via goreleaser, attaches them to a DRAFT GitHub release
-# (because `.goreleaser.yaml` sets `release.draft: true`) — review and
-# Publish in the GitHub UI when ready. Also builds + pushes multi-arch
-# container images to ghcr.io/css521/agentenv:<tag> + :latest.
+# + linux/arm64 via goreleaser and publishes a GitHub release directly
+# (`.goreleaser.yaml` sets `release.draft: false`, `prerelease: auto`), so the
+# GitHub "latest" API/redirect resolves it and downstreams can always fetch the
+# newest artifact. Also builds + pushes multi-arch container images to
+# ghcr.io/css521/agentenv:<tag> + :latest.
 
 on:
   push:

.goreleaser.yaml

@@ -77,5 +77,12 @@ docker_manifests:
       - "ghcr.io/css521/agentenv:{{ .Version }}-amd64"
       - "ghcr.io/css521/agentenv:{{ .Version }}-arm64"
 
+# Publish releases (not drafts) so downstreams can resolve the newest build via
+# the GitHub "latest" API/redirect (api.github.com/repos/<slug>/releases/latest
+# and /releases/latest/download/<asset>). Draft releases are excluded from both,
+# which breaks "always fetch the latest agentenv artifact" consumers.
+# prerelease: auto marks -rc/-beta tags as pre-releases so they don't become
+# "latest" for stable consumers.
 release:
-  draft: true
+  draft: false
+  prerelease: auto

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project are documented here. The format is based on
 [Keep a Changelog](https://keepachangelog.com/), and the project aims to follow
 [Semantic Versioning](https://semver.org/).
 
-## [0.3.1]
+## [0.3.1] - 2026-07-02
 
 ### Added
 - **Zero-downtime auto-upgrade** (`agentenv daemon`): the daemon can hot-swap