Subagents can now SEE images. Each delegate_task task accepts an optional
images list (max 8; local paths or http(s) URLs). Vision-capable children
receive native image_url content parts on their goal turn (local files as
data URLs, remote URLs verbatim); non-vision children get
[Image attached at: ...] hints plus a vision_analyze pointer. Routing
reuses agent.image_routing (decide_image_input_mode /
build_native_content_parts), so agent.image_input_mode governs delegation
exactly like inbound gateway images.
Best-effort by contract: malformed images arrays fail the call loudly
before any child spawns; unreadable paths are skipped with a log line;
any exception in the forwarding path degrades to the text-only goal.
Adapted from RooCodeInc/Roomote#1796 / #1767 (Fast agent forwards bounded
current-turn attachments to delegated coding tasks).
Teknium
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