chore: align with wr-canon v0.4.1

.claude/.wr-canon

@@ -0,0 +1,2 @@
+canon: v0.4.1
+checked: 2026-05-01

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,3 +1,5 @@
+Closes #
+
 ## Summary
 
 <!-- 1-3 bullets describing what changed and why. -->
@@ -13,5 +15,3 @@
 <!-- Post-merge work: release tagging, smoke-testing the next change, watching a metric.
      If non-trivial, link a tracking issue rather than leaving a checkbox in a closed PR.
      Delete this section if there are none. -->
-
-Closes #

.github/release.yml

@@ -11,6 +11,6 @@ changelog:
     - title: "Documentation"
       labels: ["type: docs"]
     - title: "Maintenance"
-      labels: ["infra", "chore"]
+      labels: ["infra", "type: refactor"]
   exclude:
     labels: ["duplicate", "invalid", "wontfix"]

.gitignore

@@ -15,3 +15,8 @@ Thumbs.db
 
 # Per-user Claude Code settings (allow lists, machine-specific overrides)
 .claude/settings.local.json
+
+# Claude Code worktrees (temporary working directories, never committed)
+.claude/worktrees/
+
+# Add stack-specific patterns below (node_modules/, dist/, __pycache__/, target/, etc.)

CHANGELOG.md

@@ -16,6 +16,7 @@ All notable changes to this project are documented here. Format based on [Keep a
 - `.claude/settings.json` — retire old pre-commit changelog hook; update pre-push hook to canon v0.2.5 (issue number optional in slug, allow `chore/release-v*` branches).
 - `.github/PULL_REQUEST_TEMPLATE.md` — add `## Follow-ups` section; update test plan comment to canon v0.2.5 wording.
 - `.markdownlint.json` and `.editorconfig` from the WorldRover canon. Initial scaffold missed these; CI was red on default markdownlint MD013 (line-length) until the configs landed. Plus a local `MD024: {siblings_only: true}` override so the standard Keep a Changelog repeated `### Added` headings under different version sections don't trigger duplicate-heading errors. Closes #1.
+- Align with wr-canon v0.4.1: rename `.claude/.worldrover-check` → `.claude/.wr-canon`, add `.claude/worktrees/` to `.gitignore`, fix `release.yml` Maintenance label (`chore` → `type: refactor`), move `Closes #` to top of PR template, add standard labels block to `init-labels.sh`, rename `README.md` headings to canon schema (`## Overview`, `## Getting started`, `## Usage`). Closes #34.
 
 ## [0.1.0] - 2026-04-26
 

README.md

@@ -4,18 +4,7 @@ Block-based US sovereignty history — a static D3 visualization that paints the
 
 Hover any cell for the full sequence (e.g. `France → Spain → France → USA` for the Louisiana Purchase, or `Spain → Mexico → Bear Flag Republic → USA` for California). Scroll/pinch to zoom. Drag to pan.
 
-## Run it
-
-No build, no install — just serve the directory over HTTP and open it.
-
-```bash
-python3 -m http.server 8080
-# open http://localhost:8080
-```
-
-`file://` won't work — `data/us-states.json` is fetched, so the page must be served via HTTP.
-
-## What it covers
+## Overview
 
 15 sovereignty sequences, including:
 
@@ -35,7 +24,18 @@ python3 -m http.server 8080
 
 Continental US only. AK / HI / territories are deliberately excluded.
 
-## How it's organized
+## Getting started
+
+No build, no install — just serve the directory over HTTP and open it.
+
+```bash
+python3 -m http.server 8080
+# open http://localhost:8080
+```
+
+`file://` won't work — `data/us-states.json` is fetched, so the page must be served via HTTP.
+
+## Usage
 
 | Path | What's there |
 |---|---|

scripts/init-labels.sh

@@ -49,6 +49,14 @@ create "type: docs"         "Documentation only"                    "999999"
 create "type: enhancement"  "Refinement of existing functionality"  "7057ff"
 create "type: refactor"     "Behavior-preserving restructuring"     "e4e669"
 
+# Standard
+create "duplicate"        "This issue or pull request already exists" "cfd3d7"
+create "good first issue" "Good for newcomers"                        "7057ff"
+create "help wanted"      "Extra attention is needed"                 "008672"
+create "invalid"          "This doesn't seem right"                   "e4e669"
+create "question"         "Further information is requested"          "d876e3"
+create "wontfix"          "This will not be worked on"                "ffffff"
+
 # Remove the GitHub default labels that overlap with the type:- variants.
 # These deletions are also non-fatal — if they don't exist, gh prints a warning.
 echo "Removing redundant default labels"