background.js

// Capability snapshots live in chrome.storage.session (a per-browser-session
// performance hint). Content scripts run in untrusted contexts, so the worker
// must grant them access explicitly on every startup.
if (chrome.storage.session?.setAccessLevel) {
  chrome.storage.session.setAccessLevel({ accessLevel: "TRUSTED_AND_UNTRUSTED_CONTEXTS" });
}

chrome.runtime.onInstalled.addListener(({ reason }) => {
  // Preserve the user's enabled/disabled choice across extension updates.
  if (reason === "install") chrome.storage.local.set({ shikiDocsSkinEnabled: true });
  // Capability snapshots describe third-party DOM and model labels, so they are
  // release-scoped. Never carry an older scan into a newer Shiki build. The
  // local-area removal also migrates pre-1.6 installs that cached there.
  if (reason === "install" || reason === "update") {
    chrome.storage.local.remove("shikiDetectedCapabilities");
    chrome.storage.session?.remove("shikiDetectedCapabilities");
  }
});

async function toggleStoredState() {
  const key = "shikiDocsSkinEnabled";
  const current = await chrome.storage.local.get({ [key]: true });
  const enabled = !Boolean(current[key]);
  await chrome.storage.local.set({ [key]: enabled });
  return enabled;
}

chrome.commands.onCommand.addListener(async (command) => {
  if (command !== "toggle-skin") return;
  await toggleStoredState();
});