## Summary Persist Stop-hook continuation prompts as `user` messages instead of hidden `developer` messages + some requested integration tests This is a followup to @pakrym 's comment in https://github.com/openai/codex/pull/14532 to make sure stop-block continuation prompts match training for turn loops - Stop continuation now writes `<hook_prompt hook_run_id="...">stop hook's user prompt<hook_prompt>` - Introduces quick-xml dependency, though we already indirectly depended on it anyway via syntect - This PR only has about 500 lines of actual logic changes, the rest is tests/schema ## Testing Example run (with a sessionstart hook and 3 stop hooks) - this shows context added by session start, then two stop hooks sending their own additional prompts in a new turn. The model responds with a single message addressing both. Then when that turn ends, the hooks detect that they just ran using `stop_hook_active` and decide not to infinite loop test files for this (unzip, move codex -> .codex): [codex.zip](https://github.com/user-attachments/files/26075806/codex.zip) ``` › cats • Running SessionStart hook: lighting the observatory SessionStart hook (completed) warning: Hi, I'm a session start hook for wizard-tower (startup). hook context: A wimboltine stonpet is an exotic cuisine from hyperspace • Cats are tiny zen wizards, my friend: equal parts nap, mystery, and chaos. If you want, we can talk cat facts, cat breeds, cat names, or build something cat-themed in this repo. • Running Stop hook: checking the tower wards • Running Stop hook: sacking the guards • Running Stop hook: hiring the guards Stop hook (completed) warning: Wizard Tower Stop hook reviewed the completed reply (177 chars). Stop hook (blocked) warning: Wizard Tower Stop hook continuing conversation feedback: cook the stonpet Stop hook (blocked) warning: Wizard Tower Stop hook continuing conversation feedback: eat the cooked stonpet • Stonpet’s cooked, aloha style: flash-seared over a blue quasiflame, glazed with nebula salt, and rested until the hyperspace juices settle. Now we eat with gratitude, my friend. One mindful bite in, and the flavor is pure cosmic surf: smoky, bright, and totally out of this dimension. • Running Stop hook: checking the tower wards • Running Stop hook: sacking the guards • Running Stop hook: hiring the guards Stop hook (completed) warning: Wizard Tower Stop hook reviewed the completed reply (285 chars). Stop hook (completed) warning: Wizard Tower Stop hook saw a second pass and stayed calm to avoid a loop. Stop hook (completed) warning: Wizard Tower Stop hook saw a second pass and stayed calm to avoid a loop. ```
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_preferencesgrant: does not add preferences access clauses. macos_preferences = "readonly": enables cfprefs read clauses anduser-preference-read.macos_preferences = "readwrite": includes readonly clauses plususer-preference-writeand 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_launch_services = true: enables LaunchServices lookups and open/launch operations.macos_accessibility = true: enablescom.apple.axservermach lookup.macos_calendar = true: enablescom.apple.CalendarAgentmach lookup.macos_contacts = "read_only": enables Address Book read access and Contacts read services.macos_contacts = "read_write": includes the readonly Contacts clauses plus Address Book writes and keychain/temp helpers required for writes.
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.
Legacy SandboxPolicy / sandbox_mode configs are still supported on Linux.
They can continue to use the legacy Landlock path when the split filesystem
policy is sandbox-equivalent to the legacy model after cwd resolution.
Split filesystem policies that need direct FileSystemSandboxPolicy
enforcement, such as read-only or denied carveouts under a broader writable
root, automatically route through bubblewrap. The legacy Landlock path is used
only when the split filesystem policy round-trips through the legacy
SandboxPolicy model without changing semantics. That includes overlapping
cases like /repo = write, /repo/a = none, /repo/a/b = write, where the
more specific writable child must reopen under a denied parent.
The Linux sandbox helper prefers /usr/bin/bwrap whenever it is available and
falls back to the vendored bubblewrap path otherwise. When /usr/bin/bwrap is
missing, Codex also surfaces a startup warning through its normal notification
path instead of printing directly from the sandbox helper.
Windows
Legacy SandboxPolicy / sandbox_mode configs are still supported on
Windows.
The elevated setup/runner backend supports legacy ReadOnlyAccess::Restricted
for read-only and workspace-write policies. Restricted read access honors
explicit readable roots plus the command cwd, and keeps writable roots
readable when workspace-write is used.
When include_platform_defaults = true, the elevated Windows backend adds
backend-managed system read roots required for basic execution, such as
C:\Windows, C:\Program Files, C:\Program Files (x86), and
C:\ProgramData. When it is false, those extra system roots are omitted.
The unelevated restricted-token backend still supports the legacy full-read Windows model only. Restricted read-only policies continue to fail closed there instead of running with weaker read enforcement.
New [permissions] / split filesystem policies remain supported on Windows
only when they round-trip through the legacy SandboxPolicy model without
changing semantics. Richer split-only carveouts still fail closed instead of
running with weaker enforcement.
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.