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jif ed6dde9fda Decouple session isolation from subagent attribution (#44521 )

## Why

Session isolation relied on Guardian source attribution. An explicit policy lets callers control inherited capabilities independently of how a session is attributed.

## What changed

- Add `SessionIsolation` with default `Inherit` and opt-in `Isolated` modes, captured at session startup through `ExtensionDataInit`.
- Use the policy to control inherited instructions, extensions, execution rules, and MCP resources. Isolated sessions retain managed execution rules and omit executor-discovered MCP servers.
- Explicitly isolate Guardian reviewers while preserving source-based fallback for older callers and saved reviewers.

## Testing

Extend delegate tests to cover isolation independently of attribution, update execution-policy coverage to supply the explicit policy, and assert that managed reviewers do not inherit the parent's configured MCP tools.

GitOrigin-RevId: f0ab42fa2f0237860ec661e72693ab191216afbf

2026-09-10 12:52:27 +00:00

account_thread_usage.rs

Show estimated thread usage in /status (#38281 )

2026-08-13 00:30:08 +00:00

account.rs

Scope model catalog caches to the current provider and auth identity (#43906 )

2026-09-08 20:37:30 +00:00

analytics.rs

Include originator in plugin measurement analytics (#42445 )

2026-09-03 04:38:26 +00:00

app_installed.rs

Propagate Apps tool refreshes to existing threads (#43900 )

2026-09-08 19:56:25 +00:00

app_list.rs

Support managed AWS access keys for Amazon Bedrock (#40481 )

2026-08-24 21:39:48 +00:00

app_read.rs

Use thread configuration for app/read (#37891 )

2026-08-10 22:39:29 +00:00

attestation.rs

Scope model catalog caches to the current provider and auth identity (#43906 )

2026-09-08 20:37:30 +00:00

auto_env.rs

test: add delayed exec-server transport (#31427 )

2026-07-09 00:17:38 +00:00

bedrock_setup.rs

Add AWS credential export commands for Amazon Bedrock (#44028 )

2026-09-09 03:17:48 +00:00

client_metadata.rs

Replace Guardian tickets with parent response IDs (#43002 )

2026-09-05 13:02:49 +00:00

code_mode_host.rs

Block goals after repeated execution host failures (#41454 )

2026-08-29 03:04:26 +00:00

collaboration_mode_list.rs

test: migrate TestAppServer callers to builder (#31451 )

2026-07-08 00:15:49 +00:00

command_exec.rs

Preserve managed deny-read rules across permission updates (#40004 )

2026-08-21 20:15:23 +00:00

compaction.rs

Always use streamed remote compaction for supported providers (#44255 )

2026-09-09 18:04:04 +00:00

config_requirements_application.rs

Expose managed application network requirements (#42417 )

2026-09-03 02:09:10 +00:00

config_requirements_browser_use_tests.rs

Expose managed WebMCP policy through the app server (#42823 )

2026-09-04 18:30:26 +00:00

config_requirements_in_app_browser.rs

Expose managed WebMCP policy through the app server (#42823 )

2026-09-04 18:30:26 +00:00

config_rpc.rs

Handle credential provider source remapping across config layers (#44241 )

2026-09-09 17:45:17 +00:00

connection_handling_websocket_unix.rs

Persist loaded threads before managed daemon shutdown (#44283 )

2026-09-09 19:22:22 +00:00

connection_handling_websocket.rs

Replace Windows app-server shutdown files with socket requests (#43308 )

2026-09-07 00:00:23 +00:00

curated_mcp_sync.rs

Require synchronous review for sensitive MCP actions (#41094 )

2026-08-27 08:44:54 +00:00

current_time.rs

Tag current time reminders in model context (#38443 )

2026-08-13 21:53:52 +00:00

cyber_access_program.rs

Persist Daybreak preferences in thread metadata (#42854 )

2026-09-04 21:17:25 +00:00

daemon_update_recovery.rs

Restore saved threads when the managed daemon restarts (#44314 )

2026-09-09 22:04:47 +00:00

daybreak_access.rs

Attach verified access context to eligible plugin MCP calls (#41005 )

2026-08-27 00:02:26 +00:00

dynamic_tools.rs

Scope model catalog caches to the current provider and auth identity (#43906 )

2026-09-08 20:37:30 +00:00

environment_add.rs

Report selected environment connection transitions (#33251 )

2026-07-15 05:21:13 +00:00

environment_info.rs

Cache executor metadata from initialization (#40343 )

2026-08-24 06:43:07 +00:00

environment_status.rs

Expose environment status through app-server (#32920 )

2026-07-14 01:49:16 +00:00

exec_server_test_support.rs

[app-server] expose environment info RPC (#30291 )

2026-06-27 19:34:10 +00:00

executor_mcp.rs

Cache executor metadata from initialization (#40343 )

2026-08-24 06:43:07 +00:00

executor_skills.rs

Honor response budgets when reading skill resources (#40491 )

2026-08-24 23:00:57 +00:00

experimental_api.rs

Add turn-scoped settings updates to the app server (#40656 )

2026-08-25 17:55:50 +00:00

experimental_feature_list.rs

Remove the workspace settings gate for apps and plugins (#38994 )

2026-08-17 12:26:59 +00:00

external_agent_config.rs

Expose thread originators through the app-server API (#42458 )

2026-09-03 06:02:25 +00:00

external_agent_import_sync.rs

Sync updates to imported external agent sessions (#36356 )

2026-07-31 16:17:44 +00:00

feedback.rs

Make diagnostic report uploads resilient to slow networks (#42096 )

2026-09-01 16:49:16 +00:00

fs.rs

test: migrate TestAppServer callers to builder (#31451 )

2026-07-08 00:15:49 +00:00

git_attribution.rs

Route rollout reads through the canonical JSON decoder (#42378 )

2026-09-02 22:45:19 +00:00

guardian_code_mode_tests.rs

Scope model catalog caches to the current provider and auth identity (#43906 )

2026-09-08 20:37:30 +00:00

guardian_policy_tests.rs

Scope model catalog caches to the current provider and auth identity (#43906 )

2026-09-08 20:37:30 +00:00

guardian_sync_session_tests.rs

Decouple session isolation from subagent attribution (#44521 )

2026-09-10 12:52:27 +00:00

guardian_v2_history_tests.rs

Improve Guardian retries and review failure reporting (#44482 )

2026-09-10 09:50:59 +00:00

guardian_v2_model_tests.rs

Scope model catalog caches to the current provider and auth identity (#43906 )

2026-09-08 20:37:30 +00:00

guardian_v2.rs

Always use streamed remote compaction for supported providers (#44255 )

2026-09-09 18:04:04 +00:00

history_notes_extension.rs

Track history notes thread hint outcomes (#42247 )

2026-09-02 09:12:17 +00:00

hooks_list.rs

Refresh session hooks after external plugin updates (#42990 )

2026-09-05 12:08:18 +00:00

host_skills.rs

Refresh host skill catalogs through world state (#33425 )

2026-07-15 20:59:21 +00:00

imagegen_extension.rs

Preserve per-image generation IDs in image generation analytics (#43953 )

2026-09-09 00:34:45 +00:00

initialize.rs

Negotiate MCP extensions per app-server session (#36910 )

2026-08-04 15:23:43 +00:00

luna_reserve.rs

Extend rate limit reads with usage capabilities (#42358 )

2026-09-02 21:01:04 +00:00

marketplace_add.rs

Handle @ in local marketplace paths (#34959 )

2026-07-23 15:32:36 +00:00

marketplace_remove.rs

Respect config layers when removing plugin marketplaces (#40683 )

2026-08-25 19:38:39 +00:00

marketplace_upgrade.rs

Upgrade Git marketplaces from merged configuration (#42149 )

2026-09-01 22:37:26 +00:00

mcp_event_stream.rs

Add app-server MCP event streaming (#39761 )

2026-08-20 17:49:35 +00:00

mcp_protocol_default.rs

Give hosted Codex Apps an independent MCP protocol opt-in (#44318 )

2026-09-09 22:22:08 +00:00

mcp_resource_origin.rs

Scope MCP resource reads by connector (#39244 )

2026-08-18 18:01:39 +00:00

mcp_resource.rs

Preserve runtime workspace roots across thread resume (#43848 )

2026-09-08 16:24:38 +00:00

mcp_server_elicitation.rs

Bound MCP descriptions separately from Guardian action JSON (#44493 )

2026-09-10 10:38:10 +00:00

mcp_server_status.rs

Report MCP tool discovery errors in server status (#42598 )

2026-09-03 18:36:58 +00:00

mcp_tool.rs

Give hosted Codex Apps an independent MCP protocol opt-in (#44318 )

2026-09-09 22:22:08 +00:00

memory_read.rs

Add dedicated memory v2 consolidation and read prompts (#43813 )

2026-09-08 12:58:11 +00:00

memory_reset.rs

Add memory dual writing and v2 readiness reporting (#43827 )

2026-09-08 14:23:23 +00:00

misalignment_policy.rs

Expose resumable misalignment details through app server (#40952 )

2026-08-26 18:42:44 +00:00

mod.rs

Block goals after three empty automatic continuation turns (#44320 )

2026-09-09 22:27:37 +00:00

model_auto_review.rs

Restore permission profiles when resuming threads (#39153 )

2026-08-18 06:22:04 +00:00

model_list.rs

Add opt-in model discovery for OpenAI API keys (#44392 )

2026-09-10 03:18:28 +00:00

model_provider_capabilities_read.rs

Add an Amazon Bedrock Runtime provider (#38470 )

2026-08-14 01:23:59 +00:00

multi_agent_v2_developer_instructions.rs

Scope model catalog caches to the current provider and auth identity (#43906 )

2026-09-08 20:37:30 +00:00

otel.rs

Scope model catalog caches to the current provider and auth identity (#43906 )

2026-09-08 20:37:30 +00:00

output_schema.rs

Simplify app-server integration test setup (#34786 )

2026-07-22 16:30:12 +00:00

permission_profile_list.rs

Simplify app-server integration test setup (#34786 )

2026-07-22 16:30:12 +00:00

plan_item.rs

Simplify app-server integration test setup (#34786 )

2026-07-22 16:30:12 +00:00

plugin_install.rs

Reload user config after local plugin installation (#42593 )

2026-09-03 18:20:59 +00:00

plugin_list.rs

Ignore non-JSON files in plugin catalog test helpers (#42126 )

2026-09-01 20:18:10 +00:00

plugin_read.rs

Apply app routing policy to unauthenticated plugin reads (#41230 )

2026-08-28 00:07:32 +00:00

plugin_reconcile.rs

Add plugin reconciliation app-server API (#41949 )

2026-09-01 00:50:11 +00:00

plugin_search.rs

Prefer remote Sites over the bundled plugin (#42100 )

2026-09-01 16:58:54 +00:00

plugin_share.rs

Expose plugin installation timestamps in app-server summaries (#35859 )

2026-07-29 01:16:29 +00:00

plugin_uninstall.rs

Run plugin app-server tests in automatic environments (#38189 )

2026-08-12 13:33:01 +00:00

process_exec.rs

Prevent launch context from reaching child processes (#37607 )

2026-08-08 16:58:26 +00:00

projects.rs

Persist Daybreak preferences in thread metadata (#42854 )

2026-09-04 21:17:25 +00:00

rate_limit_reset_credits.rs

Simplify app-server integration test setup (#34786 )

2026-07-22 16:30:12 +00:00

rate_limits.rs

Add Luna Reserve usage fallback to the TUI (#42372 )

2026-09-02 21:50:51 +00:00

realtime_conversation.rs

Make app-server realtime sessions always available (#42377 )

2026-09-02 22:30:30 +00:00

recommended_plugins.rs

Hydrate recommended plugin metadata on selection (#39143 )

2026-08-18 05:42:39 +00:00

remote_control_auth.rs

Bind remote-control sessions to their authentication owner (#44341 )

2026-09-09 23:59:14 +00:00

remote_control.rs

Bind remote-control sessions to their authentication owner (#44341 )

2026-09-09 23:59:14 +00:00

remote_thread_store.rs

Preserve runtime workspace roots across thread resume (#43848 )

2026-09-08 16:24:38 +00:00

request_permissions.rs

Preserve target-native cwd in permission approval requests (#42314 )

2026-09-02 17:27:50 +00:00

request_user_input.rs

Retire the untrusted approval policy (#39630 )

2026-08-20 07:03:02 +00:00

request_validation.rs

Support standalone named function call outputs (#39782 )

2026-08-20 19:19:41 +00:00

residency.rs

Scope model catalog caches to the current provider and auth identity (#43906 )

2026-09-08 20:37:30 +00:00

review.rs

Deprecate detached review delivery (#42602 )

2026-09-03 19:36:11 +00:00

rollout_migration.rs

Start rollout migration after runtime feature enablement (#40668 )

2026-08-25 18:14:32 +00:00

safety_check_downgrade.rs

Expose resumable misalignment details through app server (#40952 )

2026-08-26 18:42:44 +00:00

selected_capability_stack.rs

Honor explicit plugin mentions during MCP startup (#42406 )

2026-09-03 01:33:32 +00:00

selected_environment.rs

Harden unsandboxed patch filesystem access (#39659 )

2026-08-20 08:10:08 +00:00

server_diagnostics.rs

Keep app-server thread RPCs active until delegated work completes (#43950 )

2026-09-09 00:25:02 +00:00

session_end.rs

Simplify app-server integration test setup (#34786 )

2026-07-22 16:30:12 +00:00

skills_list.rs

Refresh plugin skills after out-of-process version changes (#42284 )

2026-09-02 14:14:44 +00:00

sleep.rs

Classify clock tools as built-in control tools (#41331 )

2026-08-28 12:40:10 +00:00

thread_archive.rs

Shut down resumed descendants when archiving thread trees (#40179 )

2026-08-23 03:25:56 +00:00

thread_delete.rs

Add thread attachment operations with coordinated deletion (#44350 )

2026-09-10 00:30:27 +00:00

thread_environments.rs

Expose loaded thread environments in app-server responses (#42386 )

2026-09-02 23:41:14 +00:00

thread_fork_multi_agent_tests.rs

Scope model catalog caches to the current provider and auth identity (#43906 )

2026-09-08 20:37:30 +00:00

thread_fork.rs

Expose thread originators through the app-server API (#42458 )

2026-09-03 06:02:25 +00:00

thread_goal_empty_responses.rs

Block goals after three empty automatic continuation turns (#44320 )

2026-09-09 22:27:37 +00:00

thread_inject_items.rs

Preserve tool output truncation budgets across resume and fork (#44248 )

2026-09-09 17:55:00 +00:00

thread_list.rs

Expose thread originators through the app-server API (#42458 )

2026-09-03 06:02:25 +00:00

thread_loaded_list.rs

Simplify app-server integration test setup (#34786 )

2026-07-22 16:30:12 +00:00

thread_memory_mode_set.rs

Honor the configured SQLite home across state consumers (#34994 )

2026-07-23 19:19:35 +00:00

thread_metadata_update.rs

Persist Daybreak preferences in thread metadata (#42854 )

2026-09-04 21:17:25 +00:00

thread_name_websocket.rs

Restore app-server websocket listener with auth guard (#22404 )

2026-05-12 18:40:53 -07:00

thread_queue.rs

Expose model settings in app-server thread metadata (#42151 )

2026-09-01 22:56:18 +00:00

thread_read.rs

Preserve runtime workspace roots across thread resume (#43848 )

2026-09-08 16:24:38 +00:00

thread_resume.rs

Allow user-requested goal pauses through update_goal (#44290 )

2026-09-09 20:03:38 +00:00

thread_revert.rs

Scope model catalog caches to the current provider and auth identity (#43906 )

2026-09-08 20:37:30 +00:00

thread_rollback.rs

Keep app-server thread RPCs active until delegated work completes (#43950 )

2026-09-09 00:25:02 +00:00

thread_sections.rs

Add appearance metadata to thread sections (#37898 )

2026-08-10 23:32:42 +00:00

thread_settings_update.rs

Scope model catalog caches to the current provider and auth identity (#43906 )

2026-09-08 20:37:30 +00:00

thread_shell_command.rs

Support configurable timeouts for thread shell commands (#41384 )

2026-08-28 18:07:40 +00:00

thread_start.rs

Expose thread originators through the app-server API (#42458 )

2026-09-03 06:02:25 +00:00

thread_status.rs

Retire the untrusted approval policy (#39630 )

2026-08-20 07:03:02 +00:00

thread_timeline.rs

Preserve runtime workspace roots across thread resume (#43848 )

2026-09-08 16:24:38 +00:00

thread_unarchive.rs

Preserve runtime workspace roots across thread resume (#43848 )

2026-09-08 16:24:38 +00:00

thread_unsubscribe.rs

Make the app-server thread unload delay configurable (#42320 )

2026-09-02 18:18:54 +00:00

turn_cost_otel.rs

Scope model catalog caches to the current provider and auth identity (#43906 )

2026-09-08 20:37:30 +00:00

turn_interrupt.rs

Standardize shell execution on unified exec (#39757 )

2026-08-20 17:46:05 +00:00

turn_settings_update.rs

Remove retired model entries while preserving migration prompts (#44250 )

2026-09-09 17:56:33 +00:00

turn_start_zsh_fork.rs

Standardize shell execution on unified exec (#39772 )

2026-08-20 18:29:35 +00:00

turn_start.rs

Remove retired model entries while preserving migration prompts (#44250 )

2026-09-09 17:56:33 +00:00

turn_steer.rs

Standardize shell execution on unified exec (#39757 )

2026-08-20 17:46:05 +00:00

user_verification_mcp.rs

Give hosted Codex Apps an independent MCP protocol opt-in (#44318 )

2026-09-09 22:22:08 +00:00

user_verification.rs

Add cancellation for native user-verification RPCs (#43925 )

2026-09-08 21:48:53 +00:00

view_image.rs

Scope model catalog caches to the current provider and auth identity (#43906 )

2026-09-08 20:37:30 +00:00

web_search.rs

Allow custom providers to opt into standalone web search (#34846 )

2026-07-23 00:02:15 +00:00

windows_sandbox_setup.rs

test: migrate TestAppServer callers to builder (#31451 )

2026-07-08 00:15:49 +00:00