Merge remote-tracking branch 'origin/rcc/ant-tools' into integration/dori-cleanroom

# Conflicts:
#	rust/crates/commands/src/lib.rs
#	rust/crates/runtime/src/conversation.rs
#	rust/crates/rusty-claude-cli/src/main.rs

rust/crates/commands/src/lib.rs

@@ -1333,6 +1333,41 @@ mod tests {
             SlashCommand::parse("/debug-tool-call"),
             Some(SlashCommand::DebugToolCall)
         );
+        assert_eq!(
+            SlashCommand::parse("/bughunter runtime"),
+            Some(SlashCommand::Bughunter {
+                scope: Some("runtime".to_string())
+            })
+        );
+        assert_eq!(SlashCommand::parse("/commit"), Some(SlashCommand::Commit));
+        assert_eq!(
+            SlashCommand::parse("/pr ready for review"),
+            Some(SlashCommand::Pr {
+                context: Some("ready for review".to_string())
+            })
+        );
+        assert_eq!(
+            SlashCommand::parse("/issue flaky test"),
+            Some(SlashCommand::Issue {
+                context: Some("flaky test".to_string())
+            })
+        );
+        assert_eq!(
+            SlashCommand::parse("/ultraplan ship both features"),
+            Some(SlashCommand::Ultraplan {
+                task: Some("ship both features".to_string())
+            })
+        );
+        assert_eq!(
+            SlashCommand::parse("/teleport conversation.rs"),
+            Some(SlashCommand::Teleport {
+                target: Some("conversation.rs".to_string())
+            })
+        );
+        assert_eq!(
+            SlashCommand::parse("/debug-tool-call"),
+            Some(SlashCommand::DebugToolCall)
+        );
         assert_eq!(
             SlashCommand::parse("/model claude-opus"),
             Some(SlashCommand::Model {
@@ -1520,6 +1555,22 @@ mod tests {
             handle_slash_command("/debug-tool-call", &session, CompactionConfig::default())
                 .is_none()
         );
+        assert!(
+            handle_slash_command("/bughunter", &session, CompactionConfig::default()).is_none()
+        );
+        assert!(handle_slash_command("/commit", &session, CompactionConfig::default()).is_none());
+        assert!(handle_slash_command("/pr", &session, CompactionConfig::default()).is_none());
+        assert!(handle_slash_command("/issue", &session, CompactionConfig::default()).is_none());
+        assert!(
+            handle_slash_command("/ultraplan", &session, CompactionConfig::default()).is_none()
+        );
+        assert!(
+            handle_slash_command("/teleport foo", &session, CompactionConfig::default()).is_none()
+        );
+        assert!(
+            handle_slash_command("/debug-tool-call", &session, CompactionConfig::default())
+                .is_none()
+        );
         assert!(
             handle_slash_command("/model claude", &session, CompactionConfig::default()).is_none()
         );

rust/crates/runtime/src/conversation.rs

@@ -10,6 +10,9 @@ use crate::permissions::{PermissionOutcome, PermissionPolicy, PermissionPrompter
 use crate::session::{ContentBlock, ConversationMessage, Session};
 use crate::usage::{TokenUsage, UsageTracker};
 
+const DEFAULT_AUTO_COMPACTION_INPUT_TOKENS_THRESHOLD: u32 = 100_000;
+const AUTO_COMPACTION_THRESHOLD_ENV_VAR: &str = "CLAUDE_CODE_AUTO_COMPACT_INPUT_TOKENS";
+
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct ApiRequest {
     pub system_prompt: Vec<String>,
@@ -86,6 +89,12 @@ pub struct TurnSummary {
     pub tool_results: Vec<ConversationMessage>,
     pub iterations: usize,
     pub usage: TokenUsage,
+    pub auto_compaction: Option<AutoCompactionEvent>,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct AutoCompactionEvent {
+    pub removed_message_count: usize,
 }
 
 pub struct ConversationRuntime<C, T> {
@@ -97,6 +106,7 @@ pub struct ConversationRuntime<C, T> {
     max_iterations: usize,
     usage_tracker: UsageTracker,
     hook_runner: HookRunner,
+    auto_compaction_input_tokens_threshold: u32,
 }
 
 impl<C, T> ConversationRuntime<C, T>
@@ -141,6 +151,7 @@ where
             max_iterations: usize::MAX,
             usage_tracker,
             hook_runner: HookRunner::from_feature_config(&feature_config),
+            auto_compaction_input_tokens_threshold: auto_compaction_threshold_from_env(),
         }
     }
 
@@ -150,6 +161,12 @@ where
         self
     }
 
+    #[must_use]
+    pub fn with_auto_compaction_input_tokens_threshold(mut self, threshold: u32) -> Self {
+        self.auto_compaction_input_tokens_threshold = threshold;
+        self
+    }
+
     pub fn run_turn(
         &mut self,
         user_input: impl Into<String>,
@@ -254,11 +271,14 @@ where
             }
         }
 
+        let auto_compaction = self.maybe_auto_compact();
+
         Ok(TurnSummary {
             assistant_messages,
             tool_results,
             iterations,
             usage: self.usage_tracker.cumulative_usage(),
+            auto_compaction,
         })
     }
 
@@ -286,6 +306,48 @@ where
     pub fn into_session(self) -> Session {
         self.session
     }
+
+    fn maybe_auto_compact(&mut self) -> Option<AutoCompactionEvent> {
+        if self.usage_tracker.cumulative_usage().input_tokens
+            < self.auto_compaction_input_tokens_threshold
+        {
+            return None;
+        }
+
+        let result = compact_session(
+            &self.session,
+            CompactionConfig {
+                max_estimated_tokens: 0,
+                ..CompactionConfig::default()
+            },
+        );
+
+        if result.removed_message_count == 0 {
+            return None;
+        }
+
+        self.session = result.compacted_session;
+        Some(AutoCompactionEvent {
+            removed_message_count: result.removed_message_count,
+        })
+    }
+}
+
+#[must_use]
+pub fn auto_compaction_threshold_from_env() -> u32 {
+    parse_auto_compaction_threshold(
+        std::env::var(AUTO_COMPACTION_THRESHOLD_ENV_VAR)
+            .ok()
+            .as_deref(),
+    )
+}
+
+#[must_use]
+fn parse_auto_compaction_threshold(value: Option<&str>) -> u32 {
+    value
+        .and_then(|raw| raw.trim().parse::<u32>().ok())
+        .filter(|threshold| *threshold > 0)
+        .unwrap_or(DEFAULT_AUTO_COMPACTION_INPUT_TOKENS_THRESHOLD)
 }
 
 fn build_assistant_message(
@@ -396,8 +458,9 @@ impl ToolExecutor for StaticToolExecutor {
 #[cfg(test)]
 mod tests {
     use super::{
-        ApiClient, ApiRequest, AssistantEvent, ConversationRuntime, RuntimeError,
-        StaticToolExecutor,
+        parse_auto_compaction_threshold, ApiClient, ApiRequest, AssistantEvent,
+        AutoCompactionEvent, ConversationRuntime, RuntimeError, StaticToolExecutor,
+        DEFAULT_AUTO_COMPACTION_INPUT_TOKENS_THRESHOLD,
     };
     use crate::compact::CompactionConfig;
     use crate::config::{RuntimeFeatureConfig, RuntimeHookConfig};
@@ -508,6 +571,7 @@ mod tests {
         assert_eq!(summary.tool_results.len(), 1);
         assert_eq!(runtime.session().messages.len(), 4);
         assert_eq!(summary.usage.output_tokens, 10);
+        assert_eq!(summary.auto_compaction, None);
         assert!(matches!(
             runtime.session().messages[1].blocks[1],
             ContentBlock::ToolUse { .. }
@@ -798,4 +862,111 @@ mod tests {
     fn shell_snippet(script: &str) -> String {
         script.to_string()
     }
+
+    #[test]
+    fn auto_compacts_when_cumulative_input_threshold_is_crossed() {
+        struct SimpleApi;
+        impl ApiClient for SimpleApi {
+            fn stream(
+                &mut self,
+                _request: ApiRequest,
+            ) -> Result<Vec<AssistantEvent>, RuntimeError> {
+                Ok(vec![
+                    AssistantEvent::TextDelta("done".to_string()),
+                    AssistantEvent::Usage(TokenUsage {
+                        input_tokens: 120_000,
+                        output_tokens: 4,
+                        cache_creation_input_tokens: 0,
+                        cache_read_input_tokens: 0,
+                    }),
+                    AssistantEvent::MessageStop,
+                ])
+            }
+        }
+
+        let session = Session {
+            version: 1,
+            messages: vec![
+                crate::session::ConversationMessage::user_text("one"),
+                crate::session::ConversationMessage::assistant(vec![ContentBlock::Text {
+                    text: "two".to_string(),
+                }]),
+                crate::session::ConversationMessage::user_text("three"),
+                crate::session::ConversationMessage::assistant(vec![ContentBlock::Text {
+                    text: "four".to_string(),
+                }]),
+            ],
+        };
+
+        let mut runtime = ConversationRuntime::new(
+            session,
+            SimpleApi,
+            StaticToolExecutor::new(),
+            PermissionPolicy::new(PermissionMode::DangerFullAccess),
+            vec!["system".to_string()],
+        )
+        .with_auto_compaction_input_tokens_threshold(100_000);
+
+        let summary = runtime
+            .run_turn("trigger", None)
+            .expect("turn should succeed");
+
+        assert_eq!(
+            summary.auto_compaction,
+            Some(AutoCompactionEvent {
+                removed_message_count: 2,
+            })
+        );
+        assert_eq!(runtime.session().messages[0].role, MessageRole::System);
+    }
+
+    #[test]
+    fn skips_auto_compaction_below_threshold() {
+        struct SimpleApi;
+        impl ApiClient for SimpleApi {
+            fn stream(
+                &mut self,
+                _request: ApiRequest,
+            ) -> Result<Vec<AssistantEvent>, RuntimeError> {
+                Ok(vec![
+                    AssistantEvent::TextDelta("done".to_string()),
+                    AssistantEvent::Usage(TokenUsage {
+                        input_tokens: 99_999,
+                        output_tokens: 4,
+                        cache_creation_input_tokens: 0,
+                        cache_read_input_tokens: 0,
+                    }),
+                    AssistantEvent::MessageStop,
+                ])
+            }
+        }
+
+        let mut runtime = ConversationRuntime::new(
+            Session::new(),
+            SimpleApi,
+            StaticToolExecutor::new(),
+            PermissionPolicy::new(PermissionMode::DangerFullAccess),
+            vec!["system".to_string()],
+        )
+        .with_auto_compaction_input_tokens_threshold(100_000);
+
+        let summary = runtime
+            .run_turn("trigger", None)
+            .expect("turn should succeed");
+        assert_eq!(summary.auto_compaction, None);
+        assert_eq!(runtime.session().messages.len(), 2);
+    }
+
+    #[test]
+    fn auto_compaction_threshold_defaults_and_parses_values() {
+        assert_eq!(
+            parse_auto_compaction_threshold(None),
+            DEFAULT_AUTO_COMPACTION_INPUT_TOKENS_THRESHOLD
+        );
+        assert_eq!(parse_auto_compaction_threshold(Some("4321")), 4321);
+        assert_eq!(
+            parse_auto_compaction_threshold(Some("not-a-number")),
+            DEFAULT_AUTO_COMPACTION_INPUT_TOKENS_THRESHOLD
+        );
+    }
 }

rust/crates/runtime/src/lib.rs

@@ -31,8 +31,8 @@ pub use config::{
     RuntimePluginConfig, ScopedMcpServerConfig, CLAW_SETTINGS_SCHEMA_NAME,
 };
 pub use conversation::{
-    ApiClient, ApiRequest, AssistantEvent, ConversationRuntime, RuntimeError, StaticToolExecutor,
-    ToolError, ToolExecutor, TurnSummary,
+    auto_compaction_threshold_from_env, ApiClient, ApiRequest, AssistantEvent, AutoCompactionEvent,
+    ConversationRuntime, RuntimeError, StaticToolExecutor, ToolError, ToolExecutor, TurnSummary,
 };
 pub use file_ops::{
     edit_file, glob_search, grep_search, read_file, write_file, EditFileOutput, GlobSearchOutput,

rust/crates/rusty-claude-cli/src/main.rs

@@ -788,6 +788,10 @@ fn format_compact_report(removed: usize, resulting_messages: usize, skipped: boo
     }
 }
 
+fn format_auto_compaction_notice(removed: usize) -> String {
+    format!("[auto-compacted: removed {removed} messages]")
+}
+
 fn parse_git_status_metadata(status: Option<&str>) -> (Option<PathBuf>, Option<String>) {
     parse_git_status_metadata_for(
         &env::current_dir().unwrap_or_else(|_| PathBuf::from(".")),
@@ -1143,13 +1147,19 @@ impl LiveCli {
         let mut permission_prompter = CliPermissionPrompter::new(self.permission_mode);
         let result = self.runtime.run_turn(input, Some(&mut permission_prompter));
         match result {
-            Ok(_) => {
+            Ok(summary) => {
                 spinner.finish(
                     "✨ Done",
                     TerminalRenderer::new().color_theme(),
                     &mut stdout,
                 )?;
                 println!();
+                if let Some(event) = summary.auto_compaction {
+                    println!(
+                        "{}",
+                        format_auto_compaction_notice(event.removed_message_count)
+                    );
+                }
                 self.persist_session()?;
                 Ok(())
             }
@@ -1197,6 +1207,10 @@ impl LiveCli {
                 "message": final_assistant_text(&summary),
                 "model": self.model,
                 "iterations": summary.iterations,
+                "auto_compaction": summary.auto_compaction.map(|event| json!({
+                    "removed_messages": event.removed_message_count,
+                    "notice": format_auto_compaction_notice(event.removed_message_count),
+                })),
                 "tool_uses": collect_tool_uses(&summary),
                 "tool_results": collect_tool_results(&summary),
                 "usage": {