musistudio/claude-code-router · warning

[plugin-marketplace] Failed to read cached marketplace: ${fo

Error message

[plugin-marketplace] Failed to read cached marketplace: ${formatError(error)}

What it means

Emitted by readCachedMarketplace when the on-disk marketplace cache cannot be read or parsed: the file is missing is handled earlier, but a read error, truncated file, or invalid JSON lands here. The function then returns an empty list, so the marketplace shows no entries.

Source

Thrown at packages/core/src/plugins/marketplace.ts:78

    ensureMarketplaceCacheDir();
    writeFileSync(marketplaceManifestCacheFile, source, "utf8");
    return normalizeMarketplaceManifest(JSON.parse(source) as unknown, url);
  } catch (error) {
    console.warn(`[plugin-marketplace] Failed to fetch marketplace from ${url}: ${formatError(error)}`);
    return readCachedMarketplace(url);
  }
}

async function readCachedMarketplace(url: string): Promise<PluginMarketplaceEntry[]> {
  if (!existsSync(marketplaceManifestCacheFile)) {
    return [];
  }

  try {
    const source = readFileSync(marketplaceManifestCacheFile, "utf8");
    return normalizeMarketplaceManifest(JSON.parse(source) as unknown, url, { offline: true });
  } catch (error) {
    console.warn(`[plugin-marketplace] Failed to read cached marketplace: ${formatError(error)}`);
    return [];
  }
}

async function normalizeMarketplaceManifest(
  value: unknown,
  manifestUrl: string,
  options: { offline?: boolean } = {}
): Promise<PluginMarketplaceEntry[]> {
  const items = marketplaceItems(value);
  const entries: PluginMarketplaceEntry[] = [];
  const seen = new Set<string>();

  for (const item of items) {
    let entry: PluginMarketplaceEntry | undefined;
    try {
      entry = await normalizeMarketplaceEntry(item, manifestUrl, options);
    } catch (error) {

View on GitHub (pinned to 99f24806c6)

Solutions

1. Delete the cache file (marketplaceManifestCacheFile) so the next successful online fetch rewrites it.
2. Ensure at least one online run completes so a fresh valid cache is produced.
3. If it recurs, capture the formatted error — a normalize error may indicate a schema change requiring a package upgrade.

Example fix

rm ~/.cache/<app>/marketplace/marketplace.json # path = marketplaceManifestCacheFile

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When it happens

Trigger: The cache file exists but is corrupt — partial write from a crash, manual editing, disk corruption — or a normalizeMarketplaceManifest validation error in offline mode.

Common situations: Process killed while writeFileSync was updating the cache; user hand-edited the cache file; cache written by an older incompatible package version.

Related errors

• [plugin-marketplace] Failed to fetch marketplace from ${url}
• [plugin-marketplace] Failed to load marketplace entry: ${for
• [plugin-marketplace] Cached module is missing while offline:

AI-assisted analysis of musistudio/claude-code-router@99f24806c6 (2026-08-27). Data as JSON: /api/errors/1d927d2bbf4aff22. Report an issue: GitHub.