Felipe Coury
5591912f0b
Fixes multiple scrollback and terminal resize issues: #5538, #5576, #8352, #12223, #16165, and #15380. ## Why Codex writes finalized transcript output into terminal scrollback after wrapping it for the current viewport width. A later terminal resize could leave that scrollback shaped for the old width, so wider windows kept narrow output and narrower windows could show stale wrapping artifacts until enough new output replaced the visible area. This is also the foundation PR for responsive markdown tables. Table rendering needs finalized transcript content to be width-sensitive after insertion, not only while content is first streaming. Markdown table rendering itself stays in #18576. ## Stack - PR1: resize backlog reflow and interrupt cleanup - #18576: markdown table support ## What Changed - Rebuild source-backed transcript history when the terminal width changes. `terminal_resize_reflow` is introduced through the experimental feature system, but is enabled by default for this rollout so we can validate behavior across real terminals. - Preserve assistant and plan stream source so finalized streaming output can participate in resize reflow after consolidation. - Debounce resize work, but force a final source-backed reflow when a resize happened during active or unconsolidated streaming output. - Clear stale pending history lines on resize so old-width wrapped output is not emitted just before rebuilt scrollback. - Bound replay work with `[tui.terminal_resize_reflow].max_rows`: omitted uses terminal-specific defaults, `0` keeps all rendered rows, and a positive value sets an explicit cap. The cap applies both while initially replaying a resumed transcript into scrollback and when rebuilding scrollback after terminal resize. - Consolidate interrupted assistant streams before cleanup, then clear pending stream output and active-tail state consistently. - Move resize reflow and thread event buffering helpers out of `app.rs` into dedicated TUI modules. - Add focused coverage for resize reflow, feature-gated behavior, streaming source preservation, interrupted output cleanup, unicode-neutral text, terminal-specific row caps, and composer/layout stability. ## Runtime Bounds Resize reflow keeps only the most recent rendered rows when a row cap is active. The default is `auto`, which maps to the detected terminal's default scrollback size where Codex can identify it: VS Code `1000`, Windows Terminal `9001`, WezTerm `3500`, and Alacritty `10000`. Terminals without a dedicated mapping use the conservative fallback of `1000` rows. Users can override this with `[tui.terminal_resize_reflow] max_rows = N`, or set `max_rows = 0` to disable row limiting. ## Validation - `just fmt` - `git diff --check` - `cargo test --manifest-path codex-rs/Cargo.toml -p codex-tui reflow` - `cargo test --manifest-path codex-rs/Cargo.toml -p codex-tui transcript_reflow` - `just fix -p codex-tui` - PR CI in progress on the squashed branch
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 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 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 vendored bubblewrap path compiled into
the binary 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.