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Support original-detail metadata on MCP image outputs (#17714)

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## Summary
- honor `_meta["codex/imageDetail"] == "original"` on MCP image content
and map it to `detail: "original"` where supported
- strip that detail back out when the active model does not support
original-detail image inputs
- update code-mode `image(...)` to accept individual MCP image blocks
- teach `js_repl` / `codex.emitImage(...)` to preserve the same hint
from raw MCP image outputs
- document the new `_meta` contract and add generic RMCP-backed coverage
across protocol, core, code-mode, and js_repl paths
This commit is contained in:
Curtis 'Fjord' Hawthorne
2026-04-15 14:43:33 -07:00
committed by GitHub
Unverified
parent 17d94bd1e3
commit 9e2fc31854
20 changed files with 905 additions and 368 deletions
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codex-rs/code-mode/src/description.rs
+1 -1
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@@ -24,7 +24,7 @@ const EXEC_DESCRIPTION_TEMPLATE: &str = r#"Run JavaScript code to orchestrate/co
- Global helpers:
- `exit()`: Immediately ends the current script successfully (like an early return from the top level).
- `text(value: string | number | boolean | undefined | null)`: Appends a text item. Non-string values are stringified with `JSON.stringify(...)` when possible.
- `image(imageUrlOrItem: string | { image_url: string; detail?: "auto" | "low" | "high" | "original" | null })`: Appends an image item. `image_url` can be an HTTPS URL or a base64-encoded `data:` URL.
- `image(imageUrlOrItem: string | { image_url: string; detail?: "auto" | "low" | "high" | "original" | null } | ImageContent, detail?: "auto" | "low" | "high" | "original" | null)`: Appends an image item. `image_url` can be an HTTPS URL or a base64-encoded `data:` URL. To forward an MCP tool image, pass an individual `ImageContent` block from `result.content`, for example `image(result.content[0])`. MCP image blocks may request original detail with `_meta: { "codex/imageDetail": "original" }`. When provided, the second `detail` argument overrides any detail embedded in the first argument.
- `store(key: string, value: any)`: stores a serializable value under a string key for later `exec` calls in the same session.
- `load(key: string)`: returns the stored value for a string key, or `undefined` if it is missing.
- `notify(value: string | number | boolean | undefined | null)`: immediately injects an extra `custom_tool_call_output` for the current `exec` call. Values are stringified like `text(...)`.