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The URL workers bound only their own path (8 workers, bounded channel); inline queries, /debug and /test spawned fetches straight from handler tasks with no limit at all — and the expensive part runs inside the fetch (ugoira: up to 512 MiB plus ffmpeg; bsky: an HLS remux), so N users could mean N concurrent encodes. fetch_with_attempts now takes one permit from an 8-slot gate (the count matching URL_WORKERS, so the bot's own pipeline keeps its full width), which covers every entry at once: message links, queue-side repair, inline, /debug, /test, and retries. Unsupported and disabled links answer before the gate, and the shared-fetch dedup already waits outside x-media, so nothing double-counts.