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Jason
6c9d444c8a
The Responses->Chat conversion serialized image-bearing *_output items into role:"tool" text via canonical_json_string, so view_image results were tokenized as base64 text (~9000x inflation). Codex replays full history every turn, so sessions hit context-limit 400s and wedged (#4465, #5663). - add proxy/tool_media: shared detection/strip/clamp walker for tool output media (typed input_image / image_url / input_file / input_audio, Anthropic source and MCP data+mimeType image shapes, untyped data: image_url, whole-string bare data URLs) - transform_codex_chat: replace media blocks in place with marker text so tool content stays a plain string, and flush the extracted media as one synthetic role:"user" message after each consecutive tool batch; media-free traffic stays byte-identical to keep prompt-cache prefixes stable - media_sanitizer: detect and strip tool-output media symmetrically (including JSON-string outputs) so reactive image stripping can heal upstream modality rejections - forwarder: regression tests pinning the reactive trigger and the context-limit-400 non-trigger E2E against Kimi K3 through the proxy: the replayed turn stays ~12k input tokens with 99% cache hit, versus ~85k+ of base64 text per replay before.