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## Why Older persisted rollouts can contain `input_image.detail` values of `auto` or `low` from before `ImageDetail` was narrowed to `high`/`original`. Current deserialization rejects those values, which can make resume skip later compacted checkpoints and reconstruct an oversized raw suffix before the next compaction attempt. Confirmed Sentry reports fixed by this compatibility path: - [CODEX-1H3F](https://openai.sentry.io/issues/7500642496/) - [CODEX-1H6N](https://openai.sentry.io/issues/7501025347/) - [CODEX-1JDP](https://openai.sentry.io/issues/7504549065/) - [CODEX-1HW6](https://openai.sentry.io/issues/7503407986/) ## Background [openai/codex#20693](https://github.com/openai/codex/pull/20693) added image-detail plumbing for app-server `UserInput` so input images could explicitly request `detail: original`. The Slack discussion behind that PR was about ScreenSpot / bridge evals where user input images were resized, while tool output images already had MCP/code-mode ways to request image detail. In review, the intended new API surface was narrowed to `high` and `original`: default to `high`, allow `original` when callers need unchanged image handling, and avoid encouraging new `auto` or `low` usage. That policy still makes sense for newly emitted values. The missing compatibility piece is persisted history. Older rollouts can already contain `auto` and `low`, and resume reconstructs typed history by deserializing those rollout records. Rejecting old values at that boundary causes valid compacted checkpoints to be skipped. This PR restores `auto` and `low` as real variants so old records deserialize and round-trip without being rewritten as `high`, while product paths can continue to default to `high` and avoid emitting `auto` for new behavior. ## What changed - Restored `ImageDetail::Auto` and `ImageDetail::Low` as first-class protocol values. - Preserved `auto`/`low` through rollout deserialization, MCP image metadata, code-mode image output, and schema/type generation. - Kept local image byte handling conservative: only `original` switches to original-resolution loading; `auto`/`low`/`high` continue through the resize-to-fit path while retaining their detail value. - Added regression coverage for enum round-tripping and code-mode `low` detail handling. ## Testing - `just write-app-server-schema` - `just test -p codex-protocol` - `just test -p codex-tools` - `just test -p codex-code-mode` - `just test -p codex-app-server-protocol` - `just test -p codex-core suite::rmcp_client::stdio_image_responses_preserve_original_detail_metadata` - `just test -p codex-core suite::code_mode::code_mode_can_use_mcp_image_result_with_image_helper` - Loaded broken rollouts on local fixed builds, and started/completed new turns. I also attempted `just test -p codex-core`; the local broad run did not finish green: 2559 tests run, 2467 passed, 55 flaky, 91 failed, 1 timed out. The failures were broad timeout/deadline failures across unrelated areas; targeted changed-path core tests above passed.
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603 lines
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{
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"type": "null"
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],
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"description": "Override the approval policy for this turn and subsequent turns."
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},
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"anyOf": [
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{
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{
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"type": "null"
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],
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"description": "Override where approval requests are routed for review on this turn and subsequent turns."
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},
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"cwd": {
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"description": "Override the working directory for this turn and subsequent turns.",
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"type": [
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"null"
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"effort": {
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],
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"description": "Override the reasoning effort for this turn and subsequent turns."
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"type": [
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"description": "Optional JSON Schema used to constrain the final assistant message for this turn."
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},
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"personality": {
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"anyOf": [
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{
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"$ref": "#/definitions/Personality"
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},
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{
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"type": "null"
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],
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"description": "Override the personality for this turn and subsequent turns."
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},
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"sandboxPolicy": {
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"anyOf": [
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{
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"$ref": "#/definitions/SandboxPolicy"
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"type": "null"
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],
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"description": "Override the sandbox policy for this turn and subsequent turns."
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},
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"serviceTier": {
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"description": "Override the service tier for this turn and subsequent turns.",
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"type": [
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"string",
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]
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},
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"summary": {
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"anyOf": [
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|
"$ref": "#/definitions/ReasoningSummary"
|
|
},
|
|
{
|
|
"type": "null"
|
|
}
|
|
],
|
|
"description": "Override the reasoning summary for this turn and subsequent turns."
|
|
},
|
|
"threadId": {
|
|
"type": "string"
|
|
}
|
|
},
|
|
"required": [
|
|
"input",
|
|
"threadId"
|
|
],
|
|
"title": "TurnStartParams",
|
|
"type": "object"
|
|
} |