Repo Atlas

From ruins to neon.

openai/codex is reconstructed as 12 major landmarks, moving from buried foundations to the current neon skyline. Minor commits are intentionally filtered out so the map tells the architectural story, not the noise.

Civilization map

Minor commits disappear. Turning points become landmarks.

The route begins in sand and ends in light. Each landmark is backed by a commit hash, score, files, and reasons.

Major commits only

Every landmark explains why it survived the filter.

Neon Citadel

Watchtower

Initial commit

59a180d2025-04-16100/100 impact

many files changedlarge file deltadependency changecore directory touchedarchitecture keywordtest infrastructure changehigh churn

.github/demo.gif
.github/workflows/ci.yml
.github/workflows/dco.yml
.gitignore
.prettierignore

Ironworks District

Rebuilt Bridge

Move daemon packages out of the standalone CLI installation (#45546)

923c6022026-09-14100/100 impact

many files changedlarge file deltadependency changecore directory touchedarchitecture keywordtest infrastructure changehigh churn

codex-rs/app-server-daemon/Cargo.toml
codex-rs/app-server-daemon/src/backend/windows.rs
codex-rs/app-server-daemon/src/install_lock.rs
codex-rs/app-server-daemon/src/lib.rs
codex-rs/app-server-daemon/src/managed_install.rs

Genesis Dunes

Foundation Stone

Seed missing daemon installs from complete local CLI packages (#45558)

653e5fb2026-09-15100/100 impact

many files changedlarge file deltadependency changecore directory touchedtest infrastructure changefirst commit

codex-rs/.config/nextest.toml
codex-rs/Cargo.lock
codex-rs/app-server-daemon/Cargo.toml
codex-rs/app-server-daemon/README.md
codex-rs/app-server-daemon/src/lib.rs

Broken Columns

Watchtower

Consolidate Guardian reviewer lifecycle ownership (#45672)

a113f3e2026-09-1595/100 impact

many files changedlarge file deltadependency changecore directory touchedtest infrastructure change

codex-rs/Cargo.lock
codex-rs/core/src/guardian/review_session.rs
codex-rs/core/src/guardian/review_session_tests.rs
codex-rs/core/src/guardian/test_host.rs
codex-rs/core/src/session/tests/guardian_tests.rs

Electric Grid

Rebuilt Bridge

Move Guardian reviewer configuration into the extension (#45729)

a9d25642026-09-1590/100 impact

many files changeddependency changecore directory touchedarchitecture keywordtest infrastructure change

codex-rs/Cargo.lock
codex-rs/core/BUILD.bazel
codex-rs/core/src/guardian/review.rs
codex-rs/core/src/guardian/review_session_tests.rs
codex-rs/core/src/guardian/reviewer_config.rs

Genesis Dunes

Watchtower

Wire Windows sandbox selection into managed proxy routing (#45757)

a5c15ab2026-09-1575/100 impact

many files changeddependency changecore directory touchedtest infrastructure change

codex-rs/Cargo.lock
codex-rs/app-server/src/request_processors/command_exec_processor.rs
codex-rs/cli/Cargo.toml
codex-rs/cli/src/debug_sandbox.rs
codex-rs/core/src/config/mod.rs

Temple of Systems

Watchtower

Add an account Summary tab to Analytics (#45769)

9bd49c92026-09-1585/100 impact

many files changedlarge file deltacore directory touchedtest infrastructure changehigh churn

codex-rs/backend-client/src/client.rs
codex-rs/backend-client/src/client/profile.rs
codex-rs/backend-client/src/client/profile_tests.rs
codex-rs/backend-client/src/lib.rs
codex-rs/tui/src/analytics.rs

Temple of Systems

Watchtower

Improve analytics chart readability and navigation (#45770)

de406962026-09-1585/100 impact

many files changedlarge file deltacore directory touchedtest infrastructure changehigh churn

codex-rs/tui/src/analytics.rs
codex-rs/tui/src/analytics/account_layout_tests.rs
codex-rs/tui/src/analytics/chart.rs
codex-rs/tui/src/analytics/dashboard.rs
codex-rs/tui/src/analytics/panels.rs

Ironworks District

Release Gate

Allow daemon updates to restore pinned packages to latest stable (#45780)

321dcf52026-09-1590/100 impact

many files changedlarge file deltacore directory touchedrelease keywordtest infrastructure change

codex-rs/app-server-daemon/README.md
codex-rs/app-server-daemon/src/backend/mod.rs
codex-rs/app-server-daemon/src/backend/pid.rs
codex-rs/app-server-daemon/src/backend/pid_start.rs
codex-rs/app-server-daemon/src/backend/pid_tests.rs

Electric Grid

Rebuilt Bridge

Complete Windows sandbox uninstall cleanup (#45799)

872fc222026-09-15100/100 impact

many files changedlarge file deltadependency changecore directory touchedarchitecture keywordtest infrastructure change

codex-rs/Cargo.lock
codex-rs/windows-sandbox-rs/src/uninstall_windows.rs
codex-rs/windows-sandbox-rs/src/uninstall_windows/principals.rs
codex-rs/windows-sandbox-rs/src/uninstall_windows/principals_tests.rs
codex-rs/windows-sandbox-rs/src/uninstall_windows/retained_logons.rs

Broken Columns

Watchtower

Preserve MCP App UI metadata in tool-call events and history (#45805)

b71af392026-09-1585/100 impact

many files changedlarge file deltacore directory touchedtest infrastructure changehigh churn

codex-rs/analytics/src/analytics_client_tests.rs
codex-rs/analytics/src/reducer.rs
codex-rs/app-server-protocol/schema/json/ServerNotification.json
codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json
codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.v2.schemas.json

Neon Citadel

Retire the personality feature flag and document deprecated settings (#45809)

883af102026-09-1585/100 impact

many files changedlarge file deltacore directory touchedtest infrastructure changelatest milestone

codex-rs/app-server-protocol/schema/json/ClientRequest.json
codex-rs/app-server-protocol/schema/json/ServerNotification.json
codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json
codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.v2.schemas.json
codex-rs/app-server-protocol/schema/json/v2/ConfigBatchWriteParams.json