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T

Michael Bolin 2fe4be1aa9 fix: codex-arg0 no longer depends on codex-core (#12434 )

## Why

`codex-rs/arg0` only needed two things from `codex-core`:

- the `find_codex_home()` wrapper
- the special argv flag used for the internal `apply_patch`
self-invocation path

That made `codex-arg0` depend on `codex-core` for a very small surface
area. This change removes that dependency edge and moves the shared
`apply_patch` invocation flag to a more natural boundary
(`codex-apply-patch`) while keeping the contract explicitly documented.

## What Changed

- Moved the internal `apply_patch` argv[1] flag constant out of
`codex-core` and into `codex-apply-patch`.
- Renamed the constant to `CODEX_CORE_APPLY_PATCH_ARG1` and documented
that it is part of the Codex core process-invocation contract (even
though it now lives in `codex-apply-patch`).
- Updated `arg0`, the core apply-patch runtime, and the `codex-exec`
apply-patch test to import the constant from `codex-apply-patch`.
- Updated `codex-rs/arg0` to call
`codex_utils_home_dir::find_codex_home()` directly instead of
`codex_core::config::find_codex_home()`.
- Removed the `codex-core` dependency from `codex-rs/arg0` and added the
needed direct dependency on `codex-utils-home-dir`.
- Added `codex-apply-patch` as a dev-dependency for `codex-rs/exec`
tests (the apply-patch test now imports the moved constant directly).

## Verification

- `cargo test -p codex-apply-patch`
- `cargo test -p codex-arg0`
- `cargo test -p codex-core --lib apply_patch`
- `cargo test -p codex-exec
test_standalone_exec_cli_can_use_apply_patch`
- `cargo shear`

2fe4be1aa9 · 2026-02-21 00:20:42 -08:00

History

src

fix: codex-arg0 no longer depends on codex-core (#12434 )

2026-02-21 00:20:42 -08:00

templates

memories: add rollout_summary_file header to raw memories and tune prompts (#12221 )

2026-02-20 09:13:35 +00:00

tests

chore: remove codex-core public protocol/shell re-exports (#12432 )

2026-02-20 23:45:35 -08:00

BUILD.bazel

Add feature-gated freeform js_repl core runtime (#10674 )

2026-02-11 12:05:02 -08:00

build.rs

fix: System skills marker includes nested folders recursively (#10350 )

2026-02-01 18:17:32 -08:00

Cargo.toml

chore: move config diagnostics out of codex-core (#12427 )

2026-02-20 23:19:29 -08:00

config.schema.json

Add experimental realtime websocket backend prompt override (#12418 )

2026-02-20 20:10:51 -08:00

gpt_5_1_prompt.md

Assemble sandbox/approval/network prompts dynamically (#8961 )

2026-01-12 23:12:59 +00:00

gpt_5_2_prompt.md

Assemble sandbox/approval/network prompts dynamically (#8961 )

2026-01-12 23:12:59 +00:00

gpt_5_codex_prompt.md

Assemble sandbox/approval/network prompts dynamically (#8961 )

2026-01-12 23:12:59 +00:00

gpt-5.1-codex-max_prompt.md

Assemble sandbox/approval/network prompts dynamically (#8961 )

2026-01-12 23:12:59 +00:00

gpt-5.2-codex_prompt.md

Assemble sandbox/approval/network prompts dynamically (#8961 )

2026-01-12 23:12:59 +00:00

hierarchical_agents_message.md

Add hierarchical agent prompt (#8996 )

2026-01-09 13:47:37 -08:00

models.json

Update models.json (#11376 )

2026-02-10 17:25:35 -08:00

prompt_with_apply_patch_instructions.md

Assemble sandbox/approval/network prompts dynamically (#8961 )

2026-01-12 23:12:59 +00:00

prompt.md

Assemble sandbox/approval/network prompts dynamically (#8961 )

2026-01-12 23:12:59 +00:00

README.md

[feat] add seatbelt permission files (#11639 )

2026-02-12 23:30:22 +00:00

review_prompt.md

docs: Fix markdown list item spacing in codex-rs/core/review_prompt.md (#4144 )

2025-10-30 17:39:21 -07:00

README.md

codex-core

This crate implements the business logic for Codex. It is designed to be used by the various Codex UIs written in Rust.

Dependencies

Note that codex-core makes some assumptions about certain helper utilities being available in the environment. Currently, this support matrix is:

macOS

Expects /usr/bin/sandbox-exec to be present.

When using the workspace-write sandbox policy, the Seatbelt profile allows writes under the configured writable roots while keeping .git (directory or pointer file), the resolved gitdir: target, and .codex read-only.

Network access and filesystem read/write roots are controlled by SandboxPolicy. Seatbelt consumes the resolved policy and enforces it.

Seatbelt also supports macOS permission-profile extensions layered on top of SandboxPolicy:

no extension profile provided: keeps legacy default preferences read access (user-preference-read).
extension profile provided with no macos_preferences grant: does not add preferences access clauses.
macos_preferences = "readonly": enables cfprefs read clauses and user-preference-read.
macos_preferences = "readwrite": includes readonly clauses plus user-preference-write and cfprefs shm write clauses.
macos_automation = true: enables broad Apple Events send permissions.
macos_automation = ["com.apple.Notes", ...]: enables Apple Events send only to listed bundle IDs.
macos_accessibility = true: enables com.apple.axserver mach lookup.
macos_calendar = true: enables com.apple.CalendarAgent mach lookup.

Linux

Expects the binary containing codex-core to run the equivalent of codex sandbox linux (legacy alias: codex debug landlock) when arg0 is codex-linux-sandbox. See the codex-arg0 crate for details.

All Platforms

Expects the binary containing codex-core to simulate the virtual apply_patch CLI when arg1 is --codex-run-as-apply-patch. See the codex-arg0 crate for details.