## Why
Shell Snapshot V2 previously captured the login-shell environment lazily when a
command started, adding that work to the command path.
## What changed
- Start one asynchronous snapshot capture after turn hooks accept the turn, so
eligible local `exec_command` calls can reuse it without blocking the model.
- Use the turn's resolved tools, permissions, sandbox, environment, and shell
configuration, and skip prewarming for unsupported or network-managed cases.
- Cancel outstanding prewarming during shutdown. Keep failed speculative
captures retryable by real commands without consuming their retry budget.
## Testing
Added coverage for non-blocking capture and reuse, failure recovery, sandbox and
permission isolation, shutdown cancellation, hook-stopped turns, eligibility
gates, and concurrent capture retries.
GitOrigin-RevId: ff24a4f0328c06653e09d03fd0a3db1eccd65030
## Why
Forking a resumed paginated thread failed when the managed `sessions` directory was a symlink, even though the rollout remained under that managed root.
## What changed
- Validate rollout lineage references against the canonical `sessions` and `archived_sessions` roots.
- Accept rollouts beneath symlinked managed roots while rejecting nested symlinks that escape those roots.
## Testing
- Cover forking a resumed rollout under a symlinked `sessions` root.
- Cover rejection of rollout lineage paths that escape through a nested symlink.
GitOrigin-RevId: 0128ecde7087120ef510baa3ed62cdbb33073117
## What changed
- Preserve the selected app account `link_id` when building native MCP tool
approval requests.
- Add `link_id` and `link_is_implicit` to the elicitation metadata, recognizing
IDs with the reserved `implicit_link::` prefix as implicit links.
## Testing
- Extend the app link policy integration test to verify elicitation metadata
for default, explicitly selected, and implicit account links.
GitOrigin-RevId: a76731d9f5f3640318187511ccdc0dc82967a9c5
## Why
Remembering an app tool approval by connector and tool alone could reuse an
approval when the same tool was called with a different selected account.
## What changed
Include the app `link_id` in MCP tool approval keys so remembered session
approvals apply only to the account link that was approved. Calls for another
link, or calls without a link selector, request their own approval.
## Testing
Add an integration test covering calls across two link IDs and the legacy
no-selector case.
GitOrigin-RevId: 7dd88330b75de312469020d5892dfb2fa5d5fada
## Why
Git root discovery is optional metadata work, but filesystem probes can block. They should not exhaust Tokio's blocking pool, delay runtime shutdown, or prevent later turns from observing repository changes.
## What changed
- Add a shared `GitRootDiscovery` service that coalesces concurrent lookups for the same working directory and limits probes across directories.
- Run probes on detached threads, retain in-flight work across caller cancellation, and discard completed results instead of caching them.
- Use the service for turn and memory metadata enrichment, abort unused turn enrichment when its state is dropped, and limit memory metadata waits to one second.
## Testing
Add coverage for probe sharing, capacity limits, cancellation, fresh discovery, runtime shutdown, memory timeouts, and repositories restored after startup prewarming.
GitOrigin-RevId: bca46fc263e7a12a2f69146d8a0b3e7c7e0846cb
## What changed
- Add the under-development `mcp_oauth_refresh_coordination` feature and pin its selected refresh mode to each MCP connection.
- Treat the refresh mode as part of OAuth connection identity so runtime and MCP configuration refreshes reconnect when the mode changes.
- Keep legacy refresh behavior in builds where coordination is unavailable and emit a warning when coordinated mode is selected.
## Testing
- Cover connection replacement when the feature is toggled through both runtime and MCP configuration refresh paths.
GitOrigin-RevId: 89596150f0338e6ede0e712badecea4450831766
## What changed
Restrict cached remote plugin catalog test helpers to `.json` files when
reading plugin IDs or rewriting `fetched_at` timestamps.
GitOrigin-RevId: a144f44a8adc26a8d0aa0d85e95c8fe0366e8aa0
## What changed
- Render descriptive Markdown labels alongside canonical local file targets instead of discarding them.
- Collapse labels that resolve to the same path, accounting for relative and absolute forms, `file://` URLs, percent encoding, case, separators, and location suffixes.
- Preserve `~/` destinations for display and keep absolute paths unless they can be shortened relative to the session working directory.
## Testing
- Add unit and snapshot coverage for descriptive and path-equivalent labels, invalid percent encoding, trailing separators, Unix and Windows paths, UNC paths, `file://` URLs, and table wrapping.
GitOrigin-RevId: 636bf4485b2899d96c6273be3f3b7f38728c9013
## What changed
- Add `approvalsReviewer` to the experimental `turn/settings/update` API.
- Apply reviewer changes to subsequently captured steps and new background approval requests while preserving pending approvals and future-thread defaults.
- Allow reviewer-only updates without `step_model_switching`, while continuing to enforce managed reviewer restrictions and model-required auto review.
- Use an explicit live reviewer update for MCP approvals while retaining refreshed thread defaults for clients that have not set one.
## Testing
- Cover switching between user and automatic review during a live turn, future-turn isolation, and managed-authority rejection.
GitOrigin-RevId: e1216b09c6a7972c2c9eaf4955d8d57d60604ca1
## What changed
- Show revealed running hooks in the bottom activity area instead of the conversation viewport or transcript overlay. Fold the hook message into the active status row when space permits and reflow it below the row without displacing background-process controls or status details.
- Keep fast hooks hidden, collapse concurrent hooks to a shared summary when needed, and support hook activity outside an active agent turn.
- Simplify durable hook output into user-facing messages and actionable failure, block, and stop states. Suppress model-facing context and quiet successful completions from all TUI history surfaces.
## Testing
- Add lifecycle, layout, narrow-width, multi-width Unicode, transcript, restart, and completion-output coverage for hook status and history rendering.
GitOrigin-RevId: 4c52b7a736e9e466e109107eb3c04a39d089597f
## Why
Rust falls back to `fork` when a macOS command combines a relative executable
path with a working directory, due to a historical `posix_spawnp` issue. This
can make local MCP server startup less reliable.
## What changed
- Spawn relative macOS MCP executables directly with `posix_spawn`, preserving
the configured path, `argv[0]`, working directory, environment, stdio, and
process group.
- Keep the existing launcher for `PATH` lookup and executable text files without
a shebang.
- Use one local child wrapper for legacy and 2026-07-28 protocol framing, with
cancellation-safe waiting and cleanup that kills and reaps dropped children.
## Testing
Add macOS regression coverage for relative scripts, argument and descriptor
preservation, launch errors, cancelled waits, and cleanup after runtime shutdown.
GitOrigin-RevId: 1cbc6b90aed6f67e0a38f551964d80496ebc4471
## What changed
- Move remote plugin install and uninstall orchestration from the app server into shared `PluginsManager` APIs.
- Keep cache and backend mutations coordinated by the installed-plugin sync gate, and retain install outcomes long enough to protect newly materialized bundles during downstream setup.
- Return structured operation errors and outcomes so callers can preserve JSON-RPC error mapping, telemetry, cache refreshes, and OAuth setup.
## Testing
- Add regression coverage that verifies uninstall holds the mutation gate, preserves the local cache when the backend operation fails, and refreshes installed state after a successful uninstall.
GitOrigin-RevId: de39f19a4e61c6e9c76ddc2c65d2ac130a4b7f88
## Why
Unified exec can run commands on an OS that differs from the Codex host. Using
host path and shell semantics for approval checks can therefore miss dangerous
Windows and PowerShell commands sent to a remote executor.
## What changed
- Thread the executor platform through command parsing, executable-name
normalization, and dangerous-command classification. Legacy executors fall
back to the host platform, while unknown reported platforms use Windows rules
conservatively.
- Bound model-facing `exec_command` rejection messages and avoid echoing the
rejected command into the error.
- Keep deterministic process IDs reserved after release so rejected test
commands cannot reuse an earlier ID.
## Testing
- Add coverage that a long dangerous PowerShell command targeting a remote
Windows executor is rejected with a bounded response.
- Verify deterministic process IDs advance after release.
GitOrigin-RevId: a26b4a63ea3d6df7140032b88b3e7aec0b85b948
## What changed
- Centralize the allowlist for bundled MCP cleanup hooks and use it for both local and executor-discovered plugins, including `unified-computer-use` cleanup through `cua_repl`.
- Mark matching cleanup hooks as trusted built-ins so they run without saved hook trust and remain active when regular hooks or their per-hook state are disabled. Plugin enablement and managed-only policy still apply.
- Hide built-in cleanup hooks from hook listings and lifecycle notifications while retaining their metrics. Keep the built-in classification out of serialized protocol data.
## Testing
- Cover allowlist boundaries, trust and enablement behavior, inline and file-based hook declarations, MCP success and error responses, hook listing, lifecycle notifications, metrics, and protocol serialization.
GitOrigin-RevId: f93b7bc99f4ed9694f529def8ec383b45f31430e
## Why
The root Python formatting pass only covered `scripts/`, leaving Python utilities elsewhere in the repository outside `just fmt` and `just fmt-check`.
## What changed
- Run the scripts Ruff formatter from the repository root.
- Exclude `sdk/python`, which has its own formatter pass, and `codex-rs/vendor`.
- Apply Ruff formatting to the newly covered Python files and update the formatter coverage test.
GitOrigin-RevId: 73ac82b8bb9c713d589724f6c4f926399febb513
## What changed
- Render complete patch contents directly in TUI history cells.
- Render all input sent to background terminals inline.
- Remove the preview row and byte limits and their transcript hints so inline and transcript views contain the same content.
## Testing
Update snapshots to cover patches and terminal input longer than the former 12-row preview limit.
GitOrigin-RevId: 9960818a9b51fc0c7f84d9def77b9b1bd8acad6c
## Why
The agent command center only listed sessions currently loaded by the app server, so completed or otherwise unloaded tasks could not be revisited from the overview.
## What changed
- Seed the overview with up to 20 recent root sessions in addition to loaded sessions, retain discovered sessions for the lifetime of the TUI, and update rows from thread lifecycle notifications.
- Allow unloaded sessions to be resumed from the overview using the normal working-directory selection and configuration rebuild flow. Explicit runtime permission choices carry across a cold resume, while settings inherited from the previously selected task do not.
- Fall back from `recency_at` to `updated_at` when connected to an older server, and continue showing loaded sessions when recent-history listing is unavailable.
## Testing
Added coverage for recent-session discovery and retention, notification races, legacy and failed listing fallbacks, cold-resume working-directory and permission handling, reconnect behavior, and unloaded-session rendering and selection.
GitOrigin-RevId: 668068b1594eb24b2ea7faccd0327804b8cd22ef
## What changed
- Add `codex-otel-trace-websocket` with a `TraceWebSocket` API that owns the
loopback OTLP receiver and WebSocket listener.
- Bind both listeners during startup, expose the exporter and bound listener
addresses, and surface listener failures through a single lifecycle method.
- Update `codex-code-mode-host` to use the new crate and shut down the bridge
after flushing its trace provider.
GitOrigin-RevId: ec5ca4c4369b6b3b1232875c2699730eb748ab1c
## Why
When the remote Sites plugin is installed and its local bundle is available, exposing the bundled copy as well creates duplicate catalog entries and can load the wrong skills.
## What changed
- Persist an account- and backend-scoped exclusion for `sites@openai-bundled` once the remote replacement is installed and loadable.
- Apply the exclusion to plugin catalogs, search, direct reads and installs, runtime loading, hooks, and skill caches while preserving the remote plugin's server-owned enabled state.
- Restore the bundled fallback when the remote plugin is absent or its local files are unavailable, and throttle repeated availability checks for 60 seconds.
## Testing
- Added manager tests for persistence across restarts, account/backend isolation, fallback restoration, concurrent checks, and refresh throttling.
- Added app-server and agent-turn tests confirming that catalog, search, and skill loading prefer remote Sites.
GitOrigin-RevId: bc1154f79d3107910fee9fa27389a0ddb48ce6cf
## Why
Diagnostic reports can span several envelopes, and the previous 10-second shared
network budget could expire before slow uploads and their attachments completed.
## What changed
- Give each diagnostic report a single five-minute deadline shared by the event,
attachments, retries, and retry backoff.
- Stop reading or sending later attachments once the deadline or a Sentry rate
limit is reached.
- Limit the app server to three concurrent report uploads and return an
overloaded JSON-RPC error for additional requests until a slot is released.
## Testing
Add coverage for slow multi-envelope reports, deadline-aware retries, skipped
attachments, rate-limit handling, and concurrency-slot release after failures.
GitOrigin-RevId: bdacf6c9731df16d2763e204565986eb6d540233
## What changed
- Probe whether the native Windows MXC process security environment is usable
when selecting a sandbox.
- Emit `codex.windows_mxc.available` at most once per process, labeled with the
probe result.
- Add the MXC workspace dependencies for Cargo and Bazel, and pin
`tracelogging` to a version compatible with the GNU Windows toolchain.
GitOrigin-RevId: d7cfeed6f0333feda5764e1ee44fe5bbd50f9a58
## Why
Custom MCP tool names may contain user data, so they should not be added to Guardian metric tags.
## What changed
- Add the sanitized `tool` tag to Guardian review counts for MCP calls served by the OpenAI Apps server.
- Keep custom MCP calls and Guardian duration and token-usage histograms on their existing tags.
## Testing
- Cover network access, OpenAI app tool calls, and custom MCP tool calls in the Guardian metrics test.
GitOrigin-RevId: 6bd09ae461eab504f8f07bf7d0c9d1c0aa1317c9
## What changed
- Add `SectionRegistry::compose` to group collected authorization fragments and transcript entries while preserving fragment boundaries and registration order.
- Use the shared composed context in the core Guardian prompt and Guardian V2 synchronous and asynchronous reviewers.
- Keep transcript rendering, retention, and delta handling with each caller while removing duplicated section grouping and authorization rendering.
## Testing
- Cover composition for synchronous and asynchronous targets, including root conversation role handling, trusted user answers, transcript entries, empty context, and contributor failures.
- Verify the synchronous reviewer preserves authorization fragment boundaries in prompt items.
GitOrigin-RevId: 9268343631fd6417bb05a3c0abce883559a37685
## What changed
- Retain MCP invocation metadata for Node-backed REPL servers so nested
elicitations can resolve the enclosing tool call.
- Use a valid, same-server `callId` from the current turn as the Guardian
assessment target while continuing to review each nested action and connector
independently.
- Fall back to an elicitation-specific target when `callId` is missing,
malformed, unknown, from another server, or from an earlier turn.
## Testing
- Cover ordinary and strict reviews for `node_repl` and `cua_repl`, multiple
nested decisions, unrelated servers, and invalid or stale call IDs.
GitOrigin-RevId: adea4b5cff96726a540ff3b3ea902b0f5dd99299
## What changed
- Add typed context sections for root-conversation evidence, trusted user answers, and conversation transcripts to `codex-guardian-context`.
- Use the shared section registry when building core Guardian prompts and asynchronous Guardian V2 scoring context.
- Preserve source-role labeling while delivering authorization evidence as user-role context, and fail closed when context collection fails.
## Testing
- Cover shared section ordering and role preservation for synchronous and asynchronous targets.
- Verify trusted user answers appear exactly once as user-role input in Guardian V2 approval flows.
GitOrigin-RevId: 1d5d793ffbf166077411a66e85e039596907fb7e
## Why
Vite+ launches Codex through the same JavaScript shim as npm, so Codex could
misidentify Vite+-owned installations and recommend npm for updates.
## What changed
- Detect Vite+ global installs from their package ownership metadata and pass a
dedicated `CODEX_MANAGED_BY_VITE_PLUS` marker to the native binary.
- Represent Vite+ in install context and `codex doctor` output.
- Recommend `vp install -g @openai/codex` in update and repair flows for
Vite+-managed installs.
See https://github.com/openai/codex/pull/30880.
GitOrigin-RevId: 8add724eefd31170a078086392609dbbd7f20b26
## What changed
- Remove standalone TUI configuration tests whose defaults or parsing paths are
already covered by broader configuration tests.
- Remove a duplicate JSON-result test that invoked the same model as the
retained test.
- Remove a service-tier test whose `None` input case is already asserted by
the neighboring filtering test.
GitOrigin-RevId: ae1304e72d03a1d44a735b4e5816936e7e4e2de5
## What changed
- Recognize executables under `CodexCLI.app/Contents/MacOS` and resolve the
surrounding standalone package layout from its sibling `bin` directory.
- Preserve standalone install detection and access to bundled resources and
path entries when Codex is launched through the app bundle.
## Testing
- Add a regression test for package layout and install method discovery from a
bundled executable.
GitOrigin-RevId: 02b41a978b256da43df95a922bc5ee99a78b8168
## Why
Guardian review evidence must remain available after a compacted thread is resumed or forked, while rolled-back or parent-local evidence must not grant authorization in a different context.
## What changed
- Store the bounded, model-invisible Guardian transcript alongside compacted rollout history and restore it from the newest surviving checkpoint during replay.
- Trim Guardian history at rollback boundaries, clearing it when the boundary has already been evicted.
- Preserve the checkpoint for user-initiated forks, but remove it when spawning a subagent so parent review evidence is not inherited.
- Keep the new rollout field optional for compatibility with existing compacted records and legacy readers.
## Testing
- Cover Guardian history across compaction, restart, paginated and pathless stores, user forks, rollback, bounded replay, serialization, and subagent forks.
GitOrigin-RevId: 6ab076d5e0c3aac4d6a41ebd50ba2b200c90213e
## What changed
- Resolve `link_id` from tool-call arguments when Apps metadata sets
`requires_explicit_link_id` to `true`.
- Reject the call before approval or execution when the required selector is
missing, empty, or not a string.
- Preserve catalog-provided account metadata for legacy Apps tools and leave
non-Apps MCP tools unchanged.
## Testing
- Add unit coverage for required selectors, malformed values, legacy
fallbacks, and non-Apps tools.
- Add end-to-end coverage for execution, approval prompts, and rejection when
an Apps call omits `link_id`.
GitOrigin-RevId: 667fd04102a3934d53ded020da6d1bf68a1ca3e5
## What changed
- Add `apps.<app_id>.links.<link_id>` configuration for overriding
`approvals_reviewer` and `default_tools_approval_mode` per connected account.
- Expose link settings through the app-server protocol and generated JSON and
TypeScript schemas.
## Testing
- Extend `config/read` coverage for populated, empty, and absent `links`
sections.
GitOrigin-RevId: 43004d2722439060fdadc5e5cd9ed3108774ecaf
## What changed
Add a `compression_enabled` attribute to each
`codex.app_server.codex_home.size_bytes` sample. The value reflects whether
`LocalThreadStoreCompression` is enabled in the effective startup configuration.
GitOrigin-RevId: c087d36b4e578245aee6cfe5257075dfd3bdd025
## What changed
- Make `local_thread_store_compression` compress cold rollout files across shared and forked histories without a separate compression mode.
- Retire `local_thread_store_shared_compression` while continuing to accept it in strict configuration without changing compression behavior.
- Read rollout files through the compressed-rollout reader when `codex exec resume` determines the latest turn's working directory.
## Testing
- Cover compression and restoration of an archived fork chain.
- Cover cwd-based resume selection when only the compressed rollout remains.
- Cover the removed compatibility key in strict configuration.
GitOrigin-RevId: 8edebf61eccc1f79cabb8e641f8982c76f337bf1
## Why
Reports from a large thread tree can exceed the rollout attachment limit, making
the threads involved in a failed Guardian review harder to diagnose.
## What changed
- Prioritize descendants with retained failed reviews when selecting bounded
report rollouts, while always preserving the reported thread.
- Include each selected thread's available Guardian trunk rollout alongside its
conversation rollout.
- Add a thread index attachment with selected filenames, bounded omission details,
retained failure threads, and the process-wide discarded-record count.
- Link failed-review records to their reviewed turn and target item when available.
## Testing
- Cover failed-review prioritization, bounded omission metadata, discarded-record
accounting, and turn/item linkage in Guardian report records.
GitOrigin-RevId: ae7916c27a3c279e899cd5a6ead8a4b7e0cc26a1
## What changed
- Add a shared `select_user_messages` helper in `guardian-context` that always
anchors the first user message and fills the remaining token budget from
newest to oldest.
- Use the helper for both core Guardian prompt rendering and the Guardian V2
async scorer so they apply the same retention policy.
## Testing
- Cover empty and single-message transcripts, over-budget anchors, and
newest-first selection across multiple token budgets.
GitOrigin-RevId: 7db246013875263ceb5806d2a6a19b4e2a3db1c4
## What changed
- Add `turn_trigger` and `codex_turn_source` to `codex_turn_event` analytics.
- Read the source from effective Responses metadata, preserving configured-over-client precedence and reflecting accepted steer metadata.
- Omit trigger and source values from analytics when they exceed the existing Responses metadata value limit.
## Testing
- Cover event serialization, turn lifecycle emission, configured and client source precedence, size limits, and source updates after steering.
GitOrigin-RevId: bbd45af4c6af52956d2394b722ea78e65e5b9bd7
## What changed
- Include the complete upstream `response.usage` object in
`ResponseUsageMetadata.metadata` while retaining the existing `amount` field.
- Expose the metadata through `rawResponse/completed` notifications and update
the generated JSON and TypeScript schemas.
## Testing
- Cover SSE, WebSocket, turn, and compaction completion paths.
GitOrigin-RevId: 6d79b1b4c92ac11abf43ec98f380b4868288a701
## What changed
- Add `tui.disable_paste_burst` as the preferred configuration key.
- Keep the top-level `disable_paste_burst` key as a legacy fallback.
- Give the `[tui]` setting precedence when both keys are present, while preserving configuration-layer precedence.
## Testing
Add configuration tests covering defaults, both key locations, precedence between the keys, and command-line overrides.
GitOrigin-RevId: e7fc9337d5b19d2fd9407e08b8301cee77a11779
## What changed
Emit the `codex.tui.start` counter once per TUI launch with an
`app_server_mode` label of `in_process`, `local_daemon`, or `remote`. Recording
the metric during startup keeps reconnects from counting as additional
launches.
GitOrigin-RevId: 7527f319b95ae53f5278fa16120120a433a29ae4
## Why
Marketplace source restrictions should cover curated plugins backed by the OpenAI plugins repository, not only user-configured marketplaces.
## What changed
- Validate both local curated catalogs against the existing OpenAI plugins Git source allowlist.
- Apply that policy to catalog discovery, installation, cached plugin and skill loading, and startup repository sync.
- Keep bundled and remote installed plugins independent of the curated Git source policy.
## Testing
Added coverage for exact and shorthand Git allowlist entries, host patterns, blocked and invalid rules, curated catalog variants, plugin skills, startup sync, and remote installed plugins.
GitOrigin-RevId: 04617acb4a93040c70a13759eb4ce872877ba211
## Why
Code-mode callbacks can outlive their initial request and run in separate tasks,
so their trace context must be preserved explicitly.
## What changed
- Preserve the execution context for code-mode callbacks and add spans for
nested tool invocations in the runtime and dispatch broker.
- Propagate each tool invocation span as the parent of its streamed gRPC
callback, falling back to the outer execution context when needed.
- Add a `codex.exec_server.process` span for each process lifetime, including
its process ID and completion result, without retaining the request span.
GitOrigin-RevId: a6059e34d895416f5517e51dad6ca0078355adca
## What changed
- Add the `plugin/reconcile` JSON-RPC method to synchronize installed remote plugin bundles and wait for required hook updates.
- Return affected plugin IDs with MCP, Apps, hooks, and skills refresh hints, plus remote update and materialization failures.
- Refresh loaded hook runtimes after relevant updates and return an empty result when plugins or backend authentication are unavailable.
## Testing
- Cover workspace and global bundle installs, unchanged passes, enablement changes, updates, removals, materialization failures, hook refreshes, and disabled plugins.
GitOrigin-RevId: 45c02518d71990d13eb09d56ed51505c91c66956
## What changed
- Verify image-generation extensions rebind permissions on every turn, preserving session grants while expiring turn-only grants.
- Cover executor skill reference reads under current filesystem permissions, including paginated reads, permission changes, and edits between pages.
- Verify oversized live executor skill prompts emit a warning without replacing previously injected prompt content.
GitOrigin-RevId: 1fc8eef409fa65db4bb1ab6a00408fe72c9e938f
## What changed
- Query workspace-visible turn estimates for ChatGPT-authenticated sessions through the appropriate Codex or ChatGPT endpoint.
- Track completed response IDs and emit `codex.turn.cost_microusd` only when the estimate is nonnegative, visible, and covers every observed response.
- Keep error response bodies out of turn-cost worker logs.
## Testing
- Cover both endpoint styles, nullable estimates, settlement validation, exact micro-USD conversion, and response-ID tracking.
- Add an app-server integration test that verifies a settled ChatGPT turn reaches the OTLP metrics exporter with its turn, conversation, and auth-mode attributes.
GitOrigin-RevId: 6ae3f8df729fad52984a0c6efafd8c96c7214e55
## Why
Composer drafts include attachments, mention targets, and deferred paste payloads in addition to visible text. Vim undo needs to restore that complete state as a single edit.
## What changed
- Add bounded, draft-level Vim undo history, with `u` as the configurable default binding in normal mode.
- Group complete Vim commands and insert sessions into undo steps, including direct composer changes such as pastes and attachments.
- Preserve undo, repeat, and search state when a reverse-history preview is canceled, and start fresh history when another prompt is accepted.
## Testing
- Cover grouped edits, custom bindings, history and search interactions, attachments, and large paste payloads.
GitOrigin-RevId: 12ecdb3c34a2d66f5d856aa2f82dc15bd91b230b
## Why
Moving between prompts in backtrack mode rebuilt every transcript renderable and
discarded their cached heights, causing the entire transcript to be laid out
again for each selection change.
## What changed
Rerender only the previously highlighted cell and the newly highlighted cell.
Keep all other renderables, cached heights, and the live tail intact while
continuing to scroll the selected prompt into view.
## Testing
Add regression tests that verify selection changes preserve unrelated height
caches and produce the same viewport and scroll position as a full rebuild,
including with a live tail and terminal width changes.
GitOrigin-RevId: 685a8ce65ecadef20521ce2ded7b516fdf8499c9
## What changed
- Show the exact `codex resume <thread-id>` command on its own indented line.
- When a thread has a name, also explain that users can run `codex resume` and select the named thread from the picker.
- Apply command highlighting to both resume options when color is enabled.
## Testing
- Cover unnamed, empty-name, named, colored, and embedded-session exit summaries.
GitOrigin-RevId: d97c04db8a34376c6d9ea839b515b04a384b85d1
jif