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Michael Bolin 85ce91a5b3 refactor(core): move embedded system skills into codex-skills crate (#12435 )

## Why

`codex-core` was carrying the embedded system-skill sample assets (and a
`build.rs` that walks those files to register rerun triggers). Those
assets change infrequently, but any change under `codex-core` still ties
them to `codex-core`'s build/cache lifecycle.

This change moves the embedded system-skills packaging into a dedicated
`codex-skills` crate so it can be cached independently. That reduces
unnecessary invalidation/rebuild pressure on `codex-core` when the
skills bundle is the only thing that changes.

## What Changed

- Added a new `codex-rs/skills` crate (`codex-skills`) with:
  - `Cargo.toml`
  - `BUILD.bazel`
  - `build.rs` to track skill asset file changes for Cargo rebuilds
- `src/lib.rs` containing the embedded system-skills install/cache logic
previously in `codex-core`
- Moved the embedded sample skill assets from
`codex-rs/core/src/skills/assets/samples` to
`codex-rs/skills/src/assets/samples`.
- Updated `codex-rs/core/Cargo.toml` to depend on `codex-skills` and
removed `codex-core`'s direct `include_dir` dependency.
- Removed `codex-core`'s `build.rs`.
- Replaced `codex-rs/core/src/skills/system.rs` implementation with a
thin re-export wrapper to keep existing `codex-core` call sites
unchanged.
- Updated workspace manifests/lockfile (`codex-rs/Cargo.toml`,
`codex-rs/Cargo.lock`) for the new crate.

85ce91a5b3 · 2026-02-21 08:34:08 +00:00

History

src

refactor(core): move embedded system skills into codex-skills crate (#12435 )

2026-02-21 08:34:08 +00:00

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

Cargo.toml

refactor(core): move embedded system skills into codex-skills crate (#12435 )

2026-02-21 08:34:08 +00:00

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.