File Size · openai/codex

File Size Overall

There are 3,288 files with 879,797 lines of code.

157 very long files (308,594 lines of code)
263 long files (182,055 lines of code)
707 medium size files (226,023 lines of code)
667 small files (96,817 lines of code)
1,494 very small files (66,308 lines of code)

Legend:

1001+

501-1000

201-500

101-200

1-100

explore: grouped by folders | grouped by size | sunburst | 3D view

File Size per Extension

1001+

501-1000

201-500

101-200

1-100

File Size per Logical Decomposition

primary

1001+

501-1000

201-500

101-200

1-100

Longest Files (Top 50)

File	# lines	# units
resume_picker.rs in codex-rs/tui/src	6747	198
thread_processor.rs in codex-rs/app-server/src/request_processors	5533	21
thread_history.rs in codex-rs/app-server-protocol/src/protocol	5262	130
mod.rs in codex-rs/core/src/session	4718	16
config_requirements.rs in codex-rs/config/src	4571	104
memories.rs in codex-rs/state/src/runtime	4559	4
main.rs in codex-rs/cli/src	4349	177
common.rs in codex-rs/app-server-protocol/src/protocol	4283	76
mod.rs in codex-rs/core/src/config	4152	61
app_server_session.rs in codex-rs/tui/src	4112	32
models.rs in codex-rs/protocol/src	4051	112
reducer.rs in codex-rs/analytics/src	3937	96
textarea.rs in codex-rs/tui/src/bottom_pane	3877	166
bespoke_event_handling.rs in codex-rs/app-server/src	3766	19
lib.rs in codex-rs/tui/src	3730	41
event_dispatch.rs in codex-rs/tui/src/app	3681	1
keymap.rs in codex-rs/tui/src	3597	101
manager.rs in codex-rs/core-plugins/src	3576	57
threads.rs in codex-rs/state/src/runtime	3571	8
mod.rs in codex-rs/tui/src/bottom_pane	3511	76
mod.rs in codex-rs/tui/src/bottom_pane/request_user_input	3478	153
protocol.rs in codex-rs/protocol/src	3254	37
client.rs in codex-rs/exec-server/src	3133	40
methods.rs in codex-rs/codex-api/src/endpoint/realtime_websocket	2979	64
turn.rs in codex-rs/core/src/session	2955	7
markdown_render.rs in codex-rs/tui/src	2872	126
doctor.rs in codex-rs/cli/src	2867	91
proxy.rs in codex-rs/network-proxy/src	2818	44
export.rs in codex-rs/app-server-protocol/src	2789	107
list_selection_view.rs in codex-rs/tui/src/bottom_pane	2780	111
manager.rs in codex-rs/login/src/auth	2760	52
bwrap.rs in codex-rs/linux-sandbox/src	2746	81
realtime_conversation.rs in codex-rs/core/src	2647	36
parse_command.rs in codex-rs/shell-command/src	2552	117
thread_manager.rs in codex-rs/core/src	2456	16
approval_overlay.rs in codex-rs/tui/src/bottom_pane	2388	80
mcp_tool_call.rs in codex-rs/core/src	2373	37
client.rs in codex-rs/core/src	2351	40
websocket.rs in codex-rs/app-server-transport/src/transport/remote_control	2336	20
plugins.rs in codex-rs/app-server/src/request_processors	2329	34
diff_render.rs in codex-rs/tui/src	2304	92
environment_selection.rs in codex-rs/core/src	2303	10
permissions.rs in codex-rs/protocol/src	2266	52
lib.rs in codex-rs/exec/src	2256	32
remote.rs in codex-rs/core-plugins/src	2220	26
lib.rs in codex-rs/cloud-tasks/src	2200	21
thread_routing.rs in codex-rs/tui/src/app	2136	2
mcp_server_elicitation.rs in codex-rs/tui/src/bottom_pane	2114	87
run_codex_compliance.py in scripts/mcp_conformance	2098	48
runtime.rs in codex-rs/network-proxy/src	2059	61

Large Files That Change Often (Top 20)

To change a file, an AI coding agent (or a person) has to read it: these files are read the most for the changes in the past year (lines × changes).

File	# lines	≈ tokens to read	# changes (1y)	≈ lines edited per change	lines read per line changed
mod.rs in codex-rs/core/src/session	4718	~30k–70k	556	~20	~200
mod.rs in codex-rs/core/src/config	4152	~20k–70k	600	~30	~100
protocol.rs in codex-rs/protocol/src	3254	~20k–50k	502	~20	~150
common.rs in codex-rs/app-server-protocol/src/protocol	4283	~20k–70k	325	~20	~200
lib.rs in codex-rs/tui/src	3730	~20k–70k	367	~30	~100
chatwidget.rs in codex-rs/tui/src	1755	~10k–30k	681	~70	~20
main.rs in codex-rs/cli/src	4349	~30k–70k	241	~30	~150
thread_processor.rs in codex-rs/app-server/src/request_processors	5533	~30k–100k	182	~50	~100
bespoke_event_handling.rs in codex-rs/app-server/src	3766	~20k–70k	258	~50	~70
event_dispatch.rs in codex-rs/tui/src/app	3681	~20k–70k	253	~30	~150
app_server_session.rs in codex-rs/tui/src	4112	~20k–70k	223	~30	~100
mod.rs in codex-rs/tui/src/bottom_pane	3511	~20k–50k	254	~30	~100
turn.rs in codex-rs/core/src/session	2955	~20k–50k	301	~30	~100
resume_picker.rs in codex-rs/tui/src	6747	~30k–100k	125	~150	~50
models.rs in codex-rs/protocol/src	4051	~20k–70k	175	~50	~70
thread_history.rs in codex-rs/app-server-protocol/src/protocol	5262	~30k–100k	123	~50	~100
session.rs in codex-rs/core/src/session	1856	~10k–30k	345	~15	~100
client.rs in codex-rs/core/src	2351	~15k–50k	268	~50	~50
thread_manager.rs in codex-rs/core/src	2456	~15k–50k	233	~30	~100
app.rs in codex-rs/tui/src	1104	~7k–20k	480	~100	~15

Tokens are lines × 7 to 14 (analysis.fileReadsForChanges). Lines edited per change are the file's lines added and deleted divided by its commits over the whole history. Agents read about 2,000 lines at a time: when a 17,000-line file was split into modules, the tokens an agent read for the same change fell by 83% (The Economic Benefit of Refactoring, 2026).

Files With Most Units (Top 50)

File	# lines	# units
resume_picker.rs in codex-rs/tui/src	6747	198
main.rs in codex-rs/cli/src	4349	177
textarea.rs in codex-rs/tui/src/bottom_pane	3877	166
mod.rs in codex-rs/tui/src/bottom_pane/request_user_input	3478	153
thread_history.rs in codex-rs/app-server-protocol/src/protocol	5262	130
markdown_render.rs in codex-rs/tui/src	2872	126
parse_command.rs in codex-rs/shell-command/src	2552	117
models.rs in codex-rs/protocol/src	4051	112
list_selection_view.rs in codex-rs/tui/src/bottom_pane	2780	111
export.rs in codex-rs/app-server-protocol/src	2789	107
config_requirements.rs in codex-rs/config/src	4571	104
keymap.rs in codex-rs/tui/src	3597	101
reducer.rs in codex-rs/analytics/src	3937	96
diff_render.rs in codex-rs/tui/src	2304	92
output.rs in codex-rs/cli/src/doctor	1836	91
doctor.rs in codex-rs/cli/src	2867	91
mcp_server_elicitation.rs in codex-rs/tui/src/bottom_pane	2114	87
bwrap.rs in codex-rs/linux-sandbox/src	2746	81
approval_overlay.rs in codex-rs/tui/src/bottom_pane	2388	80
mod.rs in codex-rs/tui/src/bottom_pane	3511	76
common.rs in codex-rs/app-server-protocol/src/protocol	4283	76
hooks_browser_view.rs in codex-rs/tui/src/bottom_pane	1597	72
client.py in sdk/python/src/openai_codex	776	71
highlight.rs in codex-rs/tui/src/render	1383	66
controller.rs in codex-rs/tui/src/streaming	1616	66
oauth.rs in codex-rs/rmcp-client/src	1643	65
methods.rs in codex-rs/codex-api/src/endpoint/realtime_websocket	2979	64
update_sdk_artifacts.py in sdk/python/scripts	1242	64
runtime.rs in codex-rs/network-proxy/src	2059	61
mod.rs in codex-rs/core/src/config	4152	61
keymap_setup.rs in codex-rs/tui/src	1638	59
linux_run_main.rs in codex-rs/linux-sandbox/src	1338	59
plugin_catalog.rs in codex-rs/tui/src/chatwidget	1910	58
manager.rs in codex-rs/core-plugins/src	3576	57
ipc.rs in codex-rs/tui/src/ide_context	1136	57
mod.rs in codex-rs/thread-store/src/local	2046	56
mod.rs in codex-rs/tui/src/external_agent_config_migration	1059	55
windows_dangerous_commands.rs in codex-rs/shell-command/src/command_safety	651	55
provider.rs in codex-rs/model-provider/src	1253	53
permissions.rs in codex-rs/protocol/src	2266	52
manager.rs in codex-rs/login/src/auth	2760	52
app_link_view.rs in codex-rs/tui/src/bottom_pane	1396	51
run_codex_compliance.py in scripts/mcp_conformance	2098	48
config.rs in codex-rs/network-proxy/src	1108	47
renderable.rs in codex-rs/tui/src/render	423	45
certs.rs in codex-rs/network-proxy/src	1169	44
proxy.rs in codex-rs/network-proxy/src	2818	44
status_surfaces.rs in codex-rs/tui/src/chatwidget	1081	43
model.rs in codex-rs/tui/src/pets	899	42
lib.rs in codex-rs/utils/absolute-path/src	677	42

Files With Long Lines (Top 50)

There are 436 files with lines longer than 120 characters. In total, there are 1300 long lines.

File	# lines	# units	# long lines
multi_agents_spec.rs in codex-rs/core/src/tools/handlers	871	20	36
lib.rs in codex-rs/cloud-tasks/src	2200	21	34
removal.ps1 in codex-rs/windows-sandbox-service/src/registered_runtime	191	-	30
install.ps1 in scripts/install	1047	-	29
catalog_prompt.rs in codex-rs/ext/skills/src	98	1	22
mod.rs in codex-rs/core/src/config	4152	61	18
event_dispatch.rs in codex-rs/tui/src/app	3681	1	17
side.rs in codex-rs/tui/src/app	748	7	17
main.rs in codex-rs/cli/src	4349	177	15
enroll.rs in codex-rs/app-server-transport/src/transport/remote_control	740	3	14
description.rs in codex-rs/code-mode-protocol/src	545	6	14
memory_import.rs in codex-rs/external-agent-migration/src	177	2	14
spec.rs in codex-rs/ext/agent-message-board/src/tools	142	-	13
streaming_parser.rs in codex-rs/apply-patch/src	861	14	13
lib.rs in codex-rs/app-server/src	1503	25	12
controller.rs in codex-rs/tui/src/streaming	1616	66	11
spec.rs in codex-rs/ext/goal/src	86	-	11
thread_attachments.rs in codex-rs/state/src/runtime	363	3	11
thread_processor.rs in codex-rs/app-server/src/request_processors	5533	21	11
mod.rs in codex-rs/core/src/tools/runtimes	814	20	10
dynamic_tools.rs in codex-rs/tui/src	1533	10	10
managed_worktree_tools.rs in codex-rs/tui/src	318	1	10
pending_interactive_replay.rs in codex-rs/tui/src/app	913	30	9
pre_tool_use.rs in codex-rs/hooks/src/events	751	23	9
clippy.toml in codex-rs	31	-	9
delete_thread.rs in codex-rs/thread-store/src/local	815	8	9
responses.rs in codex-rs/codex-api/src/sse	1285	9	9
websocket.rs in codex-rs/app-server-transport/src/transport/remote_control	2336	20	8
request_plugin_install_spec.rs in codex-rs/core/src/tools/handlers	181	2	8
actions.rs in codex-rs/tui/src/keymap_setup	485	1	8
local.rs in codex-rs/ext/agent-message-board/src	474	4	8
common.rs in codex-rs/app-server-protocol/src/protocol	4283	76	8
windows.rs in codex-rs/sandboxing/src	329	2	8
multi_agent.rs in codex-rs/prompts/src/model_messages	47	-	8
manager.rs in codex-rs/login/src/auth	2760	52	8
detection.rs in codex-rs/external-agent-migration/src/service_tests/general	843	-	8
tpl workspace_root_test_launcher.bat.tpl in root	154	-	8
role.rs in codex-rs/core/src/agent	376	3	7
onboarding_screen.rs in codex-rs/tui/src/onboarding	946	25	7
retained_instructions.rs in codex-rs/guardian-context/src	335	5	7
authorization.rs in codex-rs/guardian-context/src	87	4	7
threads.rs in codex-rs/state/src/runtime	3571	8	7
methods_common.rs in codex-rs/codex-api/src/endpoint/realtime_websocket	160	-	7
apply.rs in codex-rs/git-utils/src	758	25	7
shell_spec.rs in codex-rs/core/src/tools/handlers	321	5	6
mod.rs in codex-rs/core/src/tools/handlers	586	16	6
permissions.rs in codex-rs/core/src/config	838	22	6
world_state.rs in codex-rs/ext/git-attribution/src	69	2	6
protocol.rs in codex-rs/protocol/src	3254	37	6
setup-windows.ps1 in codex-rs/scripts	209	-	6

Correlations

File Size vs. Commits (all time): 3288 points

		6747.0	lines of code min: 1.0 average: 267.58 25th percentile: 46.0 median: 118.0 75th percentile: 289.75 max: 6747.0
0	870.0
commits (all time) min: 1.0 \| average: 13.94 \| 25th percentile: 2.0 \| median: 4.0 \| 75th percentile: 11.0 \| max: 870.0

File Size vs. Contributors (all time): 3288 points

		6747.0	lines of code min: 1.0 average: 267.58 25th percentile: 46.0 median: 118.0 75th percentile: 289.75 max: 6747.0
0	95.0
contributors (all time) min: 1.0 \| average: 5.24 \| 25th percentile: 1.0 \| median: 2.0 \| 75th percentile: 5.0 \| max: 95.0

File Size vs. Commits (30 days): 2161 points

		6747.0	lines of code min: 1.0 average: 337.41 25th percentile: 64.5 median: 156.0 75th percentile: 369.5 max: 6747.0
0	111.0
commits (30d) min: 1.0 \| average: 4.3 \| 25th percentile: 1.0 \| median: 2.0 \| 75th percentile: 5.0 \| max: 111.0

File Size vs. Contributors (30 days): 2161 points

		6747.0	lines of code min: 1.0 average: 337.41 25th percentile: 64.5 median: 156.0 75th percentile: 369.5 max: 6747.0
0	39.0
contributors (30d) min: 1.0 \| average: 2.34 \| 25th percentile: 1.0 \| median: 1.0 \| 75th percentile: 3.0 \| max: 39.0

File Size vs. Commits (90 days): 2844 points

		6747.0	lines of code min: 1.0 average: 296.45 25th percentile: 56.0 median: 139.0 75th percentile: 319.0 max: 6747.0
0	315.0
commits (90d) min: 1.0 \| average: 7.39 \| 25th percentile: 1.0 \| median: 3.0 \| 75th percentile: 7.0 \| max: 315.0

File Size vs. Contributors (90 days): 2844 points

		6747.0	lines of code min: 1.0 average: 296.45 25th percentile: 56.0 median: 139.0 75th percentile: 319.0 max: 6747.0
0	71.0
contributors (90d) min: 1.0 \| average: 3.63 \| 25th percentile: 1.0 \| median: 2.0 \| 75th percentile: 4.0 \| max: 71.0

About This Analysis

File size measurements show the distribution of size of files.
Files are classified in four categories based on their size (lines of code): 1-100 (very small files), 101-200 (small files), 201-500 (medium size files), 501-1000 (long files), 1001+(very long files).
It is a good practice to keep files small. Long files may become "bloaters", code that have increased to such gargantuan proportions that they are hard to work with.

Learn more...

To learn more about bloaters and how to deal with long code structures, Sokrates recommends the following resources:

Refactoring bloaters, sourcemaking.com
The Blob Software Development Anti-Pattern, sourcemaking.com