docs(container): add auto-generated tool versions page

Add /docs/container/versions/ page showing tool versions per release.
A scheduled GitHub Actions workflow fetches tool-versions.json from
dev-toolchain releases and regenerates the page daily.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: matthew-on-git

.github/scripts/generate-versions-page.sh

@@ -0,0 +1,105 @@
+#!/usr/bin/env bash
+# .github/scripts/generate-versions-page.sh
+#
+# Generates the Tool Versions documentation page for devrail.dev.
+# Fetches tool-versions.json release assets from the dev-toolchain repo
+# and outputs a complete Hugo markdown page to stdout.
+#
+# Usage: bash .github/scripts/generate-versions-page.sh
+# Requires: gh (GitHub CLI), jq, curl
+# Environment: GH_TOKEN must be set (provided by GitHub Actions)
+
+set -euo pipefail
+
+REPO="devrail-dev/dev-toolchain"
+
+# --- Helpers ---
+
+render_table() {
+  local json="$1"
+  echo "| Tool | Version |"
+  echo "|---|---|"
+  echo "${json}" | jq -r '.tools | to_entries | sort_by(.key) | .[] | "| \(.key) | \(.value) |"'
+}
+
+# --- Frontmatter and intro ---
+
+cat <<'FRONTMATTER'
+---
+title: "Tool Versions"
+linkTitle: "Tool Versions"
+weight: 10
+description: "Tool versions included in each dev-toolchain container release."
+---
+
+<!-- This page is generated automatically by .github/workflows/update-tool-versions.yml -->
+<!-- Do not edit manually — changes will be overwritten on the next scheduled run. -->
+
+This page shows the exact tool versions shipped in each release of the
+[dev-toolchain container](/docs/container/). It is updated automatically
+when new releases are published.
+
+FRONTMATTER
+
+# --- Fetch releases ---
+# gh api returns newest first by default. Select non-draft releases and
+# extract tag, date, and the tool-versions.json asset download URL.
+
+releases=$(gh api "repos/${REPO}/releases" --paginate --jq '
+  .[] | select(.draft == false) |
+  {
+    tag: .tag_name,
+    date: (.published_at | split("T")[0]),
+    asset_url: (
+      [.assets[] | select(.name == "tool-versions.json") | .url] | first // null
+    )
+  }
+')
+
+# --- Render page ---
+
+first=true
+has_previous=false
+
+while IFS= read -r release; do
+  tag=$(echo "${release}" | jq -r '.tag')
+  date=$(echo "${release}" | jq -r '.date')
+  asset_url=$(echo "${release}" | jq -r '.asset_url')
+
+  # Skip releases without a tool-versions.json asset
+  if [[ "${asset_url}" == "null" ]]; then
+    continue
+  fi
+
+  # Download the asset via the GitHub API (works for public and private repos)
+  versions_json=$(gh api "${asset_url}" --jq '.' 2>/dev/null) || continue
+
+  if ${first}; then
+    echo "## Latest Release: ${tag}"
+    echo ""
+    echo "Released ${date}."
+    echo ""
+    render_table "${versions_json}"
+    echo ""
+    first=false
+  else
+    if ! ${has_previous}; then
+      echo "## Previous Releases"
+      echo ""
+      has_previous=true
+    fi
+    echo "<details>"
+    echo "<summary><strong>${tag}</strong> (${date})</summary>"
+    echo ""
+    render_table "${versions_json}"
+    echo ""
+    echo "</details>"
+    echo ""
+  fi
+done <<< "${releases}"
+
+# Fallback if no releases have the asset yet
+if ${first}; then
+  echo "No releases with tool version manifests are available yet."
+  echo "Version data will appear here after the next dev-toolchain release."
+fi

.github/workflows/update-tool-versions.yml

@@ -0,0 +1,42 @@
+name: Update Tool Versions Page
+
+on:
+  schedule:
+    # Daily at 7:00 AM UTC (1h after Monday dev-toolchain builds)
+    - cron: '0 7 * * *'
+  workflow_dispatch: {}
+
+permissions:
+  contents: write
+
+jobs:
+  update-versions:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Generate tool versions page
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          bash .github/scripts/generate-versions-page.sh \
+            > content/docs/container/versions.md
+
+      - name: Check for changes
+        id: diff
+        run: |
+          if git diff --quiet content/docs/container/versions.md; then
+            echo "changed=false" >> "$GITHUB_OUTPUT"
+          else
+            echo "changed=true" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Commit and push
+        if: steps.diff.outputs.changed == 'true'
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add content/docs/container/versions.md
+          git commit -m "docs(container): update tool versions page"
+          git push

content/docs/container/_index.md

@@ -184,6 +184,11 @@ The dev-toolchain container includes all tools needed for every supported langua
 | git-cliff | Changelog generation from conventional commits |
 | pre-commit | Git hook management |
 
+## Tool Version History
+
+For the exact versions of every tool in each container release, see
+[Tool Versions](/docs/container/versions/).
+
 ## Running Tools Directly
 
 While the Makefile delegation pattern is the recommended approach, you can invoke the container directly for debugging or exploration:

content/docs/container/versions.md

@@ -0,0 +1,16 @@
+---
+title: "Tool Versions"
+linkTitle: "Tool Versions"
+weight: 10
+description: "Tool versions included in each dev-toolchain container release."
+---
+
+<!-- This page is generated automatically by .github/workflows/update-tool-versions.yml -->
+<!-- Do not edit manually — changes will be overwritten on the next scheduled run. -->
+
+This page shows the exact tool versions shipped in each release of the
+[dev-toolchain container](/docs/container/). It is updated automatically
+when new releases are published.
+
+No releases with tool version manifests are available yet. Version data
+will appear here after the next dev-toolchain release.