felixxia-oai ad8ee16a5f Require Guardian review for incompatible compaction checkpoints (#42588) ...

## Why

Guardian can reuse an opaque parent compaction only when the checkpoint's
recorded producer hash matches the scoring model. Missing or incompatible
provenance must not allow an asynchronous score or cached approval to omit
compacted context.

## What changed

- Record the producing model's compatibility hash on compaction history items
  and expose the latest checkpoint hash through conversation snapshots.
- In thread-owned context mode, fail closed and require synchronous review when
  checkpoint reuse is enabled but the latest checkpoint is incompatible or has
  unknown provenance.
- Reject incompatible checkpoints in the sampler while preserving the legacy
  context behavior.

## Testing

Add coverage for local, remote, resumed, compacted, and rolled-back histories,
including matching, mismatched, missing, and empty compatibility hashes.

GitOrigin-RevId: 1ce959cb276edc602fd7dfa442133c7fe5e53857

2026-09-03 17:48:15 +00:00

..

world_state

Make the update_plan tool opt-in (#41744)

2026-08-31 00:53:30 +00:00

approved_command_prefix_saved.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

apps_instructions.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

available_plugins_instructions.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

base_instructions.rs

Annotate Responses Lite base instructions (#40296)

2026-08-23 23:52:07 +00:00

compaction_summary.rs

Classify additional generated context fragments (#40275)

2026-08-23 20:08:40 +00:00

contextual_user_message_tests.rs

Classify internal model context by source (#40294)

2026-08-23 23:33:02 +00:00

contextual_user_message.rs

Preserve Guardian authorization across history compaction (#41660)

2026-08-30 11:56:24 +00:00

current_time_reminder.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

developer_instructions.rs

Preserve developer instruction annotations in subagent forks (#40297)

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

environment_context.rs

Honor environment-resolved workspace roots (#40912)

2026-08-26 16:28:35 +00:00

environments_instructions.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

guardian_approved_action.rs

Classify additional generated context fragments (#40275)

2026-08-23 20:08:40 +00:00

guardian_followup_review_reminder.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

guardian_node_repl_policy.rs

Source Guardian REPL policy from model metadata (#41919)

2026-08-31 22:08:44 +00:00

guardian_policy.rs

Represent Guardian policy as a contextual fragment (#40420)

2026-08-24 15:42:16 +00:00

guardian_review_evidence.rs

Require Guardian review for incompatible compaction checkpoints (#42588)

2026-09-03 17:48:15 +00:00

hook_additional_context.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

image_resize_notice.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

inter_agent_completion_message.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

inter_agent_message.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

internal_model_context.rs

Classify internal model context by source (#40294)

2026-08-23 23:33:02 +00:00

legacy_apply_patch_exec_command_warning.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

legacy_model_mismatch_warning.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

legacy_unified_exec_process_limit_warning.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

mod.rs

Persist verified user answers in Guardian thread context (#42579)

2026-09-03 16:41:11 +00:00

model_switch_instructions.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

multi_agent_mode_instructions.rs

Fix proactive multi-agent instruction grammar (#41570)

2026-08-29 20:42:12 +00:00

multi_agent_role_instructions.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

multi_agent_usage_hint.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

network_rule_saved.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

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

Build Guardian V2 synchronous review prompts (#40964)

2026-08-26 19:53:32 +00:00

permissions_instructions.rs

Use model catalog approval messages (#31312)

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

personality_spec_instructions.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

plugin_instructions.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

realtime_delegation.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

realtime_end_instructions.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

realtime_start_instructions.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

realtime_start_with_instructions.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

recommended_plugins_instructions.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

rollout_budget.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

subagent_notification.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

token_budget_context.rs

Route extension hints into context-window metadata (#40533)

2026-08-25 03:38:24 +00:00

turn_aborted.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

unsupported_media.rs

Preserve annotations when omitting unsupported media (#40277)

2026-08-23 20:14:26 +00:00

update_plan_instructions_tests.rs

Make the update_plan tool opt-in (#41744)

2026-08-31 00:53:30 +00:00

update_plan_instructions.rs

Make the update_plan tool opt-in (#41744)

2026-08-31 00:53:30 +00:00

user_instructions.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00

user_shell_command.rs

Classify contextual fragments with content kinds (#40180)

2026-08-23 03:44:21 +00:00