evanz-oai 663da53823 Sanitize developer context in full-history agent forks (#39641) ...

## Why

Developer messages can contain both inherited agent policy and unrelated context. Full-history forks need to replace the parent policy without dropping the unrelated content that shares its message.

## What changed

- Filter fork-specific developer instructions by content item instead of excluding an entire developer message.
- Remove inherited multi-agent mode instructions before applying the child agent's current mode.
- Preserve unrelated content items and discard developer messages only when filtering leaves them empty.

## Testing

Extend agent-control and subagent notification tests to cover compound compacted messages, multi-agent mode instructions, and proactive-to-explicit mode transitions.

GitOrigin-RevId: 028834e237d8636c13b17a724574bc8eb09a55ba

2026-08-20 07:29:43 +00:00

..

world_state

Refresh collaboration instructions when their content changes (#39163)

2026-08-18 07:32:03 +00:00

approved_command_prefix_saved.rs

Avoid reinjecting permissions after command approvals (#36800)

2026-08-03 21:37:17 +00:00

apps_instructions.rs

Make Apps guidance react to MCP availability (#30226)

2026-07-06 14:29:19 -07:00

available_plugins_instructions.rs

Make plugin guidance react to environment readiness (#30223)

2026-07-06 07:05:40 -07:00

contextual_user_message_tests.rs

Move host skill prompt injection into the skills extension (#37503)

2026-08-07 21:04:16 +00:00

contextual_user_message.rs

Move host skill prompt injection into the skills extension (#37503)

2026-08-07 21:04:16 +00:00

current_time_reminder.rs

Tag current time reminders in model context (#38443)

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

environment_context.rs

Preserve filesystem permission path conventions (#39084)

2026-08-17 21:49:30 +00:00

environments_instructions.rs

Clarify when to wait for starting environments (#33636)

2026-07-16 16:27:22 +00:00

guardian_followup_review_reminder.rs

skills: resolve per-turn catalogs from turn input context (#26106)

2026-06-03 13:32:55 +02:00

guardian_node_repl_policy.rs

Inject Node REPL policy into Guardian review sessions (#39267)

2026-08-18 19:22:31 +00:00

hook_additional_context.rs

skills: resolve per-turn catalogs from turn input context (#26106)

2026-06-03 13:32:55 +02:00

image_resize_notice.rs

Report prompt image resizing to the model (#37134)

2026-08-05 18:19:22 +00:00

inter_agent_completion_message.rs

feat: render typed envelopes for multi-agent v2 messages (#28368)

2026-06-16 11:46:59 +02:00

inter_agent_message.rs

Support plaintext collaboration tool messages (#35845)

2026-07-28 23:49:37 +00:00

internal_model_context.rs

skills: resolve per-turn catalogs from turn input context (#26106)

2026-06-03 13:32:55 +02:00

legacy_apply_patch_exec_command_warning.rs

skills: resolve per-turn catalogs from turn input context (#26106)

2026-06-03 13:32:55 +02:00

legacy_model_mismatch_warning.rs

skills: resolve per-turn catalogs from turn input context (#26106)

2026-06-03 13:32:55 +02:00

legacy_unified_exec_process_limit_warning.rs

skills: resolve per-turn catalogs from turn input context (#26106)

2026-06-03 13:32:55 +02:00

mod.rs

Sanitize developer context in full-history agent forks (#39641)

2026-08-20 07:29:43 +00:00

model_switch_instructions.rs

Track model and personality in world state (#35530)

2026-07-26 23:36:33 +00:00

multi_agent_mode_instructions.rs

Sanitize developer context in full-history agent forks (#39641)

2026-08-20 07:29:43 +00:00

multi_agent_role_instructions.rs

Source multi-agent instructions from the model catalog (#38619)

2026-08-14 18:26:20 +00:00

multi_agent_usage_hint.rs

Track multi-agent usage hints in world state (#37189)

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

network_rule_saved.rs

skills: resolve per-turn catalogs from turn input context (#26106)

2026-06-03 13:32:55 +02:00

node_repl_review_evidence_tests.rs

Include node_repl images in Guardian review evidence (#38454)

2026-08-13 23:29:52 +00:00

node_repl_review_evidence.rs

Include node_repl screenshots in Guardian v2 reviews (#39227)

2026-08-18 16:38:52 +00:00

permissions_instructions.rs

Use model catalog approval messages (#31312)

2026-07-07 10:52:38 -07:00

personality_spec_instructions.rs

Track model and personality in world state (#35530)

2026-07-26 23:36:33 +00:00

plugin_instructions.rs

skills: resolve per-turn catalogs from turn input context (#26106)

2026-06-03 13:32:55 +02:00

realtime_delegation.rs

Reconnect WebRTC Realtime sideband transports (#39257)

2026-08-18 18:41:40 +00:00

realtime_end_instructions.rs

Allow custom Codex instructions for realtime transitions (#36408)

2026-07-31 23:51:33 +00:00

realtime_start_instructions.rs

skills: resolve per-turn catalogs from turn input context (#26106)

2026-06-03 13:32:55 +02:00

realtime_start_with_instructions.rs

skills: resolve per-turn catalogs from turn input context (#26106)

2026-06-03 13:32:55 +02:00

recommended_plugins_instructions.rs

Tighten recommended plugin install suggestions (#32949)

2026-07-14 04:29:57 +00:00

rollout_budget.rs

[codex] rollout budget implementation (varlength 2/N) (#28494)

2026-06-18 18:52:19 +00:00

subagent_notification.rs

skills: resolve per-turn catalogs from turn input context (#26106)

2026-06-03 13:32:55 +02:00

token_budget_context.rs

Track context windows per agent (#37347)

2026-08-07 01:05:33 +00:00

turn_aborted.rs

skills: resolve per-turn catalogs from turn input context (#26106)

2026-06-03 13:32:55 +02:00

user_instructions.rs

[codex] Load AGENTS.md from all bound environments (#27696)

2026-06-12 00:10:06 -07:00

user_shell_command.rs

skills: resolve per-turn catalogs from turn input context (#26106)

2026-06-03 13:32:55 +02:00