diff --git a/CHANGELOG.md b/CHANGELOG.md
index 93d8669..dcb24a5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,26 @@ All notable changes to Phokus are documented here. The format is based on
 aims to follow [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
 (0.x: anything may change between minor versions).
 
+## [Unreleased]
+
+### Added
+
+- Failed AI-tagging jobs can now be located from the background worker prompt,
+  including a gallery filter for images with failed tags and an expanded list
+  of failed filenames/errors.
+- A new theme system adds Phokus, Subtle Light, and Conventional Dark chrome
+  options across the app.
+- First-run onboarding now includes an inline theme picker so new users can
+  choose their preferred app chrome before continuing the tour.
+
+### Changed
+
+- Polished the new theme surfaces before release, including readable
+  subtle-light secondary buttons, failed-worker action buttons, and onboarding
+  controls.
+- Onboarding preview media keeps the dark gallery/media surface regardless of
+  the active chrome theme.
+
 ## [0.1.0] — 2026-06-14
 
 First public release. Windows desktop, distributed as an unsigned NSIS
diff --git a/package.json b/package.json
index 4267de3..bda87fe 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
     "dev:web": "cd website && pnpm dev",
     "build:app:cpu": "tauri build -- --no-default-features",
     "build:app:cuda": "tauri build --config src-tauri/tauri.cuda.conf.json",
+    "changelog:add": "node tools/changelog-add.mjs",
     "dev:vite": "vite",
     "preview": "vite preview",
     "tauri": "tauri"
diff --git a/tools/changelog-add.mjs b/tools/changelog-add.mjs
new file mode 100644
index 0000000..cb24c92
--- /dev/null
+++ b/tools/changelog-add.mjs
@@ -0,0 +1,71 @@
+#!/usr/bin/env node
+import { readFileSync, writeFileSync } from "node:fs";
+import { resolve } from "node:path";
+
+const SECTION_BY_TYPE = {
+  added: "Added",
+  changed: "Changed",
+  deprecated: "Deprecated",
+  removed: "Removed",
+  fixed: "Fixed",
+  security: "Security",
+};
+
+function usage() {
+  console.error([
+    "Usage:",
+    "  pnpm changelog:add -- --type fixed --message \"Fix thing\"",
+    "",
+    `Types: ${Object.keys(SECTION_BY_TYPE).join(", ")}`,
+  ].join("\n"));
+  process.exit(1);
+}
+
+function argValue(name) {
+  const index = process.argv.indexOf(`--${name}`);
+  if (index === -1) return null;
+  return process.argv[index + 1] ?? null;
+}
+
+const type = argValue("type")?.toLowerCase();
+const message = argValue("message")?.trim();
+
+if (!type || !message || !SECTION_BY_TYPE[type]) {
+  usage();
+}
+
+const section = SECTION_BY_TYPE[type];
+const changelogPath = resolve("CHANGELOG.md");
+let changelog = readFileSync(changelogPath, "utf8");
+
+if (!/^## \[Unreleased\]/m.test(changelog)) {
+  changelog = changelog.replace(
+    /(\r?\n)(## \[[^\r\n]+\])/,
+    `$1## [Unreleased]$1$1$2`,
+  );
+}
+
+const unreleasedMatch = changelog.match(/^## \[Unreleased\][\s\S]*?(?=^## \[|\z)/m);
+if (!unreleasedMatch) {
+  throw new Error("Could not find or create an Unreleased section.");
+}
+
+const unreleased = unreleasedMatch[0];
+const lineEnding = changelog.includes("\r\n") ? "\r\n" : "\n";
+const bullet = `- ${message}`;
+
+let nextUnreleased;
+const sectionRegex = new RegExp(`(^### ${section}\\s*)([\\s\\S]*?)(?=^### |\\z)`, "m");
+const sectionMatch = unreleased.match(sectionRegex);
+
+if (sectionMatch) {
+  const body = sectionMatch[2].trimEnd();
+  const replacement = `${sectionMatch[1]}${body ? `${body}${lineEnding}` : ""}${bullet}${lineEnding}${lineEnding}`;
+  nextUnreleased = unreleased.replace(sectionRegex, replacement);
+} else {
+  const insert = `${lineEnding}### ${section}${lineEnding}${lineEnding}${bullet}${lineEnding}`;
+  nextUnreleased = unreleased.trimEnd() + insert + lineEnding;
+}
+
+changelog = changelog.replace(unreleased, nextUnreleased);
+writeFileSync(changelogPath, changelog);