jif
fae2709320
## Why Multi-agent v2 identifies agents by canonical paths, but its tool handlers still emitted the larger legacy collaboration begin/end events built around nickname and role metadata. App-server, rollout-trace, analytics, and TUI consumers therefore lacked one compact path-based completion signal that behaved consistently across live events and replay. The TUI also needs a bounded `/agent` status surface for v2 agents. It should use recent local activity for previews, refresh liveness without loading full histories, and keep the legacy picker available when no path-backed v2 agent is known. ## What changed - Replace the v2 `spawn_agent`, `send_message`, `followup_task`, and `interrupt_agent` legacy lifecycle emissions with a success-only `SubAgentActivity` event. The event records the tool call ID, occurrence time, affected thread, canonical agent path, and `started`, `interacted`, or `interrupted` kind. - Expose the activity as a completion-only app-server v2 `subAgentActivity` thread item in live notifications and reconstructed history, regenerate the protocol schemas, and count it in sub-agent tool analytics. - Track canonical paths from live activity and loaded-thread metadata in the TUI, and render the activity in live and replayed transcripts. - Make `/agent` list running path-backed agents with summaries from bounded local event buffers. Each summary is capped at 240 graphemes, the scan is capped at six recent items, only the last three wrapped lines are shown, and command output is omitted. Liveness falls back to metadata-only `thread/read` when local turn state is unavailable. - Persist the activity as a terminal rollout-trace runtime payload and reduce it to the corresponding spawn, send, follow-up, or close interaction edge. `interrupt_agent` is classified as a close-edge operation. - Preserve the legacy picker when no path-backed v2 agent is known. ## Compatibility App-server v2 clients that consumed `collabAgentToolCall` begin/end pairs for these tools must handle the new completion-only `subAgentActivity` item. Legacy v1 collaboration behavior is unchanged. ## Screenshot <img width="684" height="288" alt="Screenshot 2026-06-08 at 15 40 47" src="https://github.com/user-attachments/assets/194b3cd0-619d-45fb-b587-cf3e2b1b8a1d" /> ## Testing - `just test -p codex-app-server-protocol` - `just test -p codex-rollout-trace` - Added focused coverage for activity analytics, terminal trace serialization, spawn-edge reduction, `interrupt_agent` classification, TUI status rendering without aggregated command output, and clearing stale running state after a completed turn.
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 keeps the legacy default preferences read access
(user-preference-read) needed for cfprefs-backed macOS behavior.
Linux
Expects the binary containing codex-core to run the equivalent of codex sandbox 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 the first bwrap found on PATH outside the
current working directory whenever it is available. If bwrap is present but
too old to support --argv0, the helper keeps using system bubblewrap and
switches to a no---argv0 compatibility path for the inner re-exec. If
bwrap is missing, it falls back to the bundled codex-resources/bwrap
binary shipped with Codex and Codex surfaces a startup warning through its
normal notification path instead of printing directly from the sandbox helper.
Codex also surfaces a startup warning when bubblewrap cannot create user
namespaces. WSL2 uses the normal Linux bubblewrap path. WSL1 is not supported
for bubblewrap sandboxing because it cannot create the required user
namespaces, so Codex rejects sandboxed shell commands that would enter the
bubblewrap path before invoking bwrap.
Windows
Legacy SandboxPolicy / sandbox_mode configs are still supported on
Windows. Legacy read-only and workspace-write policies imply full
filesystem read access; exact readable roots are represented by split
filesystem policies instead.
The elevated Windows sandbox also supports:
- legacy
ReadOnlyandWorkspaceWritebehavior - split filesystem policies that need exact readable roots, exact writable roots, or extra read-only carveouts under writable roots
- backend-managed system read roots required for basic execution, such as
C:\Windows,C:\Program Files,C:\Program Files (x86), andC:\ProgramData, when a split filesystem policy requests platform defaults
The unelevated restricted-token backend still supports the legacy full-read
Windows model for legacy ReadOnly and WorkspaceWrite behavior. It also
supports a narrow split-filesystem subset: full-read split policies whose
writable roots still match the legacy WorkspaceWrite root set, but add extra
read-only carveouts under those writable roots.
New [permissions] / split filesystem policies remain supported on Windows
only when they can be enforced directly by the selected Windows backend or
round-trip through the legacy SandboxPolicy model without changing semantics.
Policies that would require direct explicit unreadable carveouts (none) or
reopened writable descendants under read-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.