From 5df7ade35e10ba0f7f875c3ff04a10bbe047d163 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 18:40:04 -0500
Subject: [PATCH 01/37] =?UTF-8?q?=F0=9F=A4=96=20Simplify=20compaction=20at?=
 =?UTF-8?q?=20protocol=20level?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Remove compact_summary tool and replace with direct text streaming:
- Model now streams summary text directly instead of using a tool call
- Removed compact_summary tool definition and service implementation
- Updated StreamingMessageAggregator to extract text from compaction streams
- Updated WorkspaceStore to handle compaction on stream-end instead of tool completion
- Removed toolPolicy requirement forcing compact_summary tool usage
- Updated tests and mock scenarios to reflect new flow

Benefits:
1. Live feedback: Summary streams as it's being generated (visible to user)
2. Context efficiency: No duplicate text in tool calls and assistant message
3. Simpler protocol: Fewer moving parts, less code to maintain

Generated with cmux
---
 src/services/mock/scenarios/slashCommands.ts  | 43 ++-----------------
 src/services/tools/compact_summary.ts         | 24 -----------
 src/stores/WorkspaceStore.ts                  | 43 +++++++++++--------
 .../messages/StreamingMessageAggregator.ts    | 17 ++++++++
 src/utils/messages/compactionOptions.test.ts  |  5 ++-
 src/utils/messages/compactionOptions.ts       |  1 -
 src/utils/tools/toolDefinitions.ts            | 12 ------
 src/utils/tools/tools.ts                      |  2 -
 src/utils/ui/modeUtils.ts                     |  2 -
 9 files changed, 48 insertions(+), 101 deletions(-)
 delete mode 100644 src/services/tools/compact_summary.ts

diff --git a/src/services/mock/scenarios/slashCommands.ts b/src/services/mock/scenarios/slashCommands.ts
index 59d82c726..3dd6ca4ac 100644
--- a/src/services/mock/scenarios/slashCommands.ts
+++ b/src/services/mock/scenarios/slashCommands.ts
@@ -29,36 +29,11 @@ const compactConversationTurn: ScenarioTurn = {
       {
         kind: "stream-delta",
         delay: STREAM_BASE_DELAY,
-        text: "Preparing a compact technical summary based on prior tool results…\n",
-      },
-      {
-        kind: "tool-start",
-        delay: STREAM_BASE_DELAY * 2,
-        toolCallId: "tool-compact-summary",
-        toolName: "compact_summary",
-        args: {
-          targetWords: 385,
-        },
-      },
-      {
-        kind: "tool-end",
-        delay: STREAM_BASE_DELAY * 3,
-        toolCallId: "tool-compact-summary",
-        toolName: "compact_summary",
-        result: {
-          success: true,
-          summary: COMPACT_SUMMARY_TEXT,
-          message: "Summary generated successfully.",
-        },
-      },
-      {
-        kind: "stream-delta",
-        delay: STREAM_BASE_DELAY * 3 + 100,
-        text: "Summary ready. Replacing history with the compacted version now.",
+        text: COMPACT_SUMMARY_TEXT,
       },
       {
         kind: "stream-end",
-        delay: STREAM_BASE_DELAY * 4,
+        delay: STREAM_BASE_DELAY * 2,
         metadata: {
           model: "anthropic:claude-sonnet-4-5",
           inputTokens: 220,
@@ -68,19 +43,7 @@ const compactConversationTurn: ScenarioTurn = {
         parts: [
           {
             type: "text",
-            text: "Summary ready. Replacing history with the compacted version now.",
-          },
-          {
-            type: "dynamic-tool",
-            toolCallId: "tool-compact-summary",
-            toolName: "compact_summary",
-            state: "output-available",
-            input: {
-              targetWords: 385,
-            },
-            output: {
-              summary: COMPACT_SUMMARY_TEXT,
-            },
+            text: COMPACT_SUMMARY_TEXT,
           },
         ],
       },
diff --git a/src/services/tools/compact_summary.ts b/src/services/tools/compact_summary.ts
deleted file mode 100644
index e75260794..000000000
--- a/src/services/tools/compact_summary.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-import { tool } from "ai";
-import type { ToolFactory } from "@/utils/tools/tools";
-import { TOOL_DEFINITIONS } from "@/utils/tools/toolDefinitions";
-
-/**
- * Compact summary tool factory for context compaction
- * Creates a tool that allows the AI to provide a conversation summary
- * @param config Required configuration (not used for this tool, but required by interface)
- */
-export const createCompactSummaryTool: ToolFactory = () => {
-  return tool({
-    description: TOOL_DEFINITIONS.compact_summary.description,
-    inputSchema: TOOL_DEFINITIONS.compact_summary.schema,
-    execute: ({ summary }) => {
-      // Tool execution is a no-op on the backend
-      // The summary is intercepted by the frontend and used to replace history
-      return Promise.resolve({
-        success: true,
-        summary,
-        message: "Summary generated successfully.",
-      });
-    },
-  });
-};
diff --git a/src/stores/WorkspaceStore.ts b/src/stores/WorkspaceStore.ts
index f48171575..974801da4 100644
--- a/src/stores/WorkspaceStore.ts
+++ b/src/stores/WorkspaceStore.ts
@@ -415,30 +415,38 @@ export class WorkspaceStore {
    * Handle compact_summary tool completion.
    * Returns true if compaction was handled (caller should early return).
    */
-  private handleCompactSummaryCompletion(
+  private handleCompactionCompletion(
     workspaceId: string,
     aggregator: StreamingMessageAggregator,
     data: WorkspaceChatMessage
   ): boolean {
-    // Type guard: only StreamEndEvent has parts
-    if (!("parts" in data) || !data.parts) return false;
-
-    for (const part of data.parts) {
-      if (part.type === "dynamic-tool" && part.toolName === "compact_summary") {
-        const output = part.output as { summary?: string } | undefined;
-        if (output?.summary) {
-          this.performCompaction(workspaceId, aggregator, data, output.summary);
-          return true;
-        }
-        break;
-      }
+    // Type guard: only StreamEndEvent has messageId
+    if (!("messageId" in data)) return false;
+
+    // Check if this was a compaction stream by looking at the last user message
+    const messages = aggregator.getAllMessages();
+    const lastUserMsg = [...messages]
+      .reverse()
+      .find((m) => m.role === "user");
+    
+    if (lastUserMsg?.metadata?.cmuxMetadata?.type !== "compaction-request") {
+      return false;
+    }
+
+    // Extract the summary text from the assistant's response
+    const summary = aggregator.getCompactionSummary(data.messageId);
+    if (!summary) {
+      console.warn("[WorkspaceStore] Compaction completed but no summary text found");
+      return false;
     }
-    return false;
+
+    this.performCompaction(workspaceId, aggregator, data, summary);
+    return true;
   }
 
   /**
    * Perform history compaction by replacing chat history with summary message.
-   * Type-safe: only called when we've verified data has parts (i.e., StreamEndEvent).
+   * Type-safe: only called when we've verified data is a StreamEndEvent.
    */
   private performCompaction(
     workspaceId: string,
@@ -446,7 +454,6 @@ export class WorkspaceStore {
     data: WorkspaceChatMessage,
     summary: string
   ): void {
-    // We know data is StreamEndEvent because handleCompactSummaryCompletion verified it has parts
     // Extract metadata safely with type guard
     const metadata = "metadata" in data ? data.metadata : undefined;
 
@@ -781,8 +788,8 @@ export class WorkspaceStore {
       aggregator.handleStreamEnd(data);
       aggregator.clearTokenState(data.messageId);
 
-      // Early return if compact_summary handled (async replacement in progress)
-      if (this.handleCompactSummaryCompletion(workspaceId, aggregator, data)) {
+      // Early return if compaction handled (async replacement in progress)
+      if (this.handleCompactionCompletion(workspaceId, aggregator, data)) {
         return;
       }
 
diff --git a/src/utils/messages/StreamingMessageAggregator.ts b/src/utils/messages/StreamingMessageAggregator.ts
index 7959ba8da..fb82c2ffb 100644
--- a/src/utils/messages/StreamingMessageAggregator.ts
+++ b/src/utils/messages/StreamingMessageAggregator.ts
@@ -92,6 +92,23 @@ export class StreamingMessageAggregator {
     return this.currentTodos;
   }
 
+  /**
+   * Extract compaction summary text from a completed assistant message.
+   * Used when a compaction stream completes to get the summary for history replacement.
+   * @param messageId The ID of the assistant message to extract text from
+   * @returns The concatenated text from all text parts, or undefined if message not found
+   */
+  getCompactionSummary(messageId: string): string | undefined {
+    const message = this.messages.get(messageId);
+    if (!message) return undefined;
+
+    // Concatenate all text parts (ignore tool calls and reasoning)
+    return message.parts
+      .filter((part): part is { type: "text"; text: string } => part.type === "text")
+      .map((part) => part.text)
+      .join("");
+  }
+
   /**
    * Clean up stream-scoped state when stream ends (normally or abnormally).
    * Called by handleStreamEnd, handleStreamAbort, and handleStreamError.
diff --git a/src/utils/messages/compactionOptions.test.ts b/src/utils/messages/compactionOptions.test.ts
index 3b78b9f41..0eefa8011 100644
--- a/src/utils/messages/compactionOptions.test.ts
+++ b/src/utils/messages/compactionOptions.test.ts
@@ -58,12 +58,13 @@ describe("applyCompactionOverrides", () => {
     expect(result.maxOutputTokens).toBe(8000);
   });
 
-  it("sets compact mode and tool policy", () => {
+  it("sets compact mode", () => {
     const compactData: CompactionRequestData = {};
     const result = applyCompactionOverrides(baseOptions, compactData);
 
     expect(result.mode).toBe("compact");
-    expect(result.toolPolicy).toEqual([{ regex_match: "compact_summary", action: "require" }]);
+    // No special toolPolicy for compaction - uses base options
+    expect(result.toolPolicy).toEqual([]);
   });
 
   it("applies all overrides together", () => {
diff --git a/src/utils/messages/compactionOptions.ts b/src/utils/messages/compactionOptions.ts
index 97809b20a..6f4d6cc40 100644
--- a/src/utils/messages/compactionOptions.ts
+++ b/src/utils/messages/compactionOptions.ts
@@ -34,7 +34,6 @@ export function applyCompactionOverrides(
     ...baseOptions,
     model: compactionModel,
     thinkingLevel: isAnthropic ? "off" : baseOptions.thinkingLevel,
-    toolPolicy: [{ regex_match: "compact_summary", action: "require" }],
     maxOutputTokens: compactData.maxOutputTokens,
     mode: "compact" as const,
   };
diff --git a/src/utils/tools/toolDefinitions.ts b/src/utils/tools/toolDefinitions.ts
index 36288f17e..edbe57245 100644
--- a/src/utils/tools/toolDefinitions.ts
+++ b/src/utils/tools/toolDefinitions.ts
@@ -141,17 +141,6 @@ export const TOOL_DEFINITIONS = {
         ),
     }),
   },
-  compact_summary: {
-    description:
-      "Summarize the conversation history into a compact form. This tool is used during context compaction to reduce token usage while preserving key information.",
-    schema: z.object({
-      summary: z
-        .string()
-        .describe(
-          "Compact summary of the conversation, preserving key decisions, context, and important details. Include enough information for the conversation to continue meaningfully."
-        ),
-    }),
-  },
   todo_write: {
     description:
       "Create or update the todo list for tracking multi-step tasks (limit: 7 items). " +
@@ -229,7 +218,6 @@ export function getAvailableTools(modelString: string): string[] {
     // "file_edit_replace_lines", // DISABLED: causes models to break repo state
     "file_edit_insert",
     "propose_plan",
-    "compact_summary",
     "todo_write",
     "todo_read",
   ];
diff --git a/src/utils/tools/tools.ts b/src/utils/tools/tools.ts
index 923ccfb6b..b924dbd9f 100644
--- a/src/utils/tools/tools.ts
+++ b/src/utils/tools/tools.ts
@@ -5,7 +5,6 @@ import { createFileEditReplaceStringTool } from "@/services/tools/file_edit_repl
 // DISABLED: import { createFileEditReplaceLinesTool } from "@/services/tools/file_edit_replace_lines";
 import { createFileEditInsertTool } from "@/services/tools/file_edit_insert";
 import { createProposePlanTool } from "@/services/tools/propose_plan";
-import { createCompactSummaryTool } from "@/services/tools/compact_summary";
 import { createTodoWriteTool, createTodoReadTool } from "@/services/tools/todo";
 import { log } from "@/services/log";
 
@@ -58,7 +57,6 @@ export async function getToolsForModel(
     file_edit_insert: createFileEditInsertTool(config),
     bash: createBashTool(config),
     propose_plan: createProposePlanTool(config),
-    compact_summary: createCompactSummaryTool(config),
     todo_write: createTodoWriteTool(config),
     todo_read: createTodoReadTool(config),
   };
diff --git a/src/utils/ui/modeUtils.ts b/src/utils/ui/modeUtils.ts
index 0d9d10452..7f2e27af4 100644
--- a/src/utils/ui/modeUtils.ts
+++ b/src/utils/ui/modeUtils.ts
@@ -19,7 +19,6 @@ export function modeToToolPolicy(mode: UIMode): ToolPolicy {
   if (mode === "plan") {
     return [
       { regex_match: "file_edit_.*", action: "disable" },
-      { regex_match: "compact_summary", action: "disable" },
       { regex_match: "propose_plan", action: "enable" },
     ];
   }
@@ -27,7 +26,6 @@ export function modeToToolPolicy(mode: UIMode): ToolPolicy {
   // exec mode
   return [
     { regex_match: "propose_plan", action: "disable" },
-    { regex_match: "compact_summary", action: "disable" },
     { regex_match: "file_edit_.*", action: "enable" },
   ];
 }

From 1b0779df7c620b578532aaa9eca5bdf71dfd2f69 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 18:42:56 -0500
Subject: [PATCH 02/37] Fix formatting

---
 src/stores/WorkspaceStore.ts | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/stores/WorkspaceStore.ts b/src/stores/WorkspaceStore.ts
index 974801da4..b0c10ec50 100644
--- a/src/stores/WorkspaceStore.ts
+++ b/src/stores/WorkspaceStore.ts
@@ -425,10 +425,8 @@ export class WorkspaceStore {
 
     // Check if this was a compaction stream by looking at the last user message
     const messages = aggregator.getAllMessages();
-    const lastUserMsg = [...messages]
-      .reverse()
-      .find((m) => m.role === "user");
-    
+    const lastUserMsg = [...messages].reverse().find((m) => m.role === "user");
+
     if (lastUserMsg?.metadata?.cmuxMetadata?.type !== "compaction-request") {
       return false;
     }

From 8f5938ed782560f26346b8f60df1ce64d95fb5ad Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 18:46:54 -0500
Subject: [PATCH 03/37] Update E2E test for new compaction flow

---
 tests/e2e/scenarios/slashCommands.spec.ts | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/tests/e2e/scenarios/slashCommands.spec.ts b/tests/e2e/scenarios/slashCommands.spec.ts
index b1544a8fe..4dddc1b72 100644
--- a/tests/e2e/scenarios/slashCommands.spec.ts
+++ b/tests/e2e/scenarios/slashCommands.spec.ts
@@ -81,7 +81,7 @@ test.describe("slash command flows", () => {
       });
     }
 
-    const timeline = await ui.chat.captureStreamTimeline(
+    await ui.chat.captureStreamTimeline(
       async () => {
         await ui.chat.sendMessage("/compact -t 500");
       },
@@ -89,11 +89,9 @@ test.describe("slash command flows", () => {
     );
 
     await ui.chat.expectStatusMessageContains("Compaction started");
-    const compactToolStart = timeline.events.find(
-      (event) => event.type === "tool-call-start" && event.toolName === "compact_summary"
-    );
-    expect(compactToolStart).toBeDefined();
-
+    
+    // Compaction now uses direct text streaming instead of a tool call
+    // Verify the summary text appears in the transcript
     const transcript = page.getByRole("log", { name: "Conversation transcript" });
     await ui.chat.expectTranscriptContains(COMPACT_SUMMARY_TEXT);
     await expect(transcript).toContainText(COMPACT_SUMMARY_TEXT);

From 58d0695214048423ad71c2b999a4c4b4df21cab6 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 18:48:31 -0500
Subject: [PATCH 04/37] Fix formatting

---
 tests/e2e/scenarios/slashCommands.spec.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/e2e/scenarios/slashCommands.spec.ts b/tests/e2e/scenarios/slashCommands.spec.ts
index 4dddc1b72..b118633ec 100644
--- a/tests/e2e/scenarios/slashCommands.spec.ts
+++ b/tests/e2e/scenarios/slashCommands.spec.ts
@@ -89,7 +89,7 @@ test.describe("slash command flows", () => {
     );
 
     await ui.chat.expectStatusMessageContains("Compaction started");
-    
+
     // Compaction now uses direct text streaming instead of a tool call
     // Verify the summary text appears in the transcript
     const transcript = page.getByRole("log", { name: "Conversation transcript" });

From da41f63c608c33d509ac0a41b249d0a4d0171347 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:20:14 -0500
Subject: [PATCH 05/37] =?UTF-8?q?=F0=9F=A4=96=20Style=20compaction=20strea?=
 =?UTF-8?q?ming=20with=20visual=20effects?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Add special styling for compaction messages as they stream:

New components (isolated complexity):
- CompactionBackground: Animated shimmer effect during compaction
- CompactingMessageContent: Container with max-height (300px) and sticky scroll

Changes:
- Added --color-plan-mode-rgb CSS variable for alpha blending
- Pass isCompacting prop through MessageRenderer to AssistantMessage
- Wrap streaming compaction content in special container with animation
- Auto-scroll to bottom as compaction text streams in
- Custom scrollbar styling with plan-mode colors

UX improvements:
- Visual distinction for compaction streams
- Constrained height prevents overwhelming UI
- Smooth shimmer animation provides feedback
- Sticky scroll keeps latest content visible

Generated with cmux
---
 src/components/Messages/AssistantMessage.tsx  | 13 +++-
 .../Messages/CompactingMessageContent.tsx     | 63 +++++++++++++++++++
 .../Messages/CompactionBackground.tsx         | 36 +++++++++++
 src/components/Messages/MessageRenderer.tsx   |  7 ++-
 src/styles/colors.tsx                         |  1 +
 5 files changed, 118 insertions(+), 2 deletions(-)
 create mode 100644 src/components/Messages/CompactingMessageContent.tsx
 create mode 100644 src/components/Messages/CompactionBackground.tsx

diff --git a/src/components/Messages/AssistantMessage.tsx b/src/components/Messages/AssistantMessage.tsx
index 7a99e86ae..99de6e07b 100644
--- a/src/components/Messages/AssistantMessage.tsx
+++ b/src/components/Messages/AssistantMessage.tsx
@@ -8,6 +8,7 @@ import { MessageWindow } from "./MessageWindow";
 import { useStartHere } from "@/hooks/useStartHere";
 import { COMPACTED_EMOJI } from "@/constants/ui";
 import { ModelDisplay } from "./ModelDisplay";
+import { CompactingMessageContent } from "./CompactingMessageContent";
 
 const RawContent = styled.pre`
   font-family: var(--font-monospace);
@@ -49,6 +50,7 @@ interface AssistantMessageProps {
   message: DisplayedMessage & { type: "assistant" };
   className?: string;
   workspaceId?: string;
+  isCompacting?: boolean;
   clipboardWriteText?: (data: string) => Promise<void>;
 }
 
@@ -56,6 +58,7 @@ export const AssistantMessage: React.FC<AssistantMessageProps> = ({
   message,
   className,
   workspaceId,
+  isCompacting = false,
   clipboardWriteText = (data: string) => navigator.clipboard.writeText(data),
 }) => {
   const [showRaw, setShowRaw] = useState(false);
@@ -64,6 +67,7 @@ export const AssistantMessage: React.FC<AssistantMessageProps> = ({
   const content = message.content;
   const isStreaming = message.isStreaming;
   const isCompacted = message.isCompacted;
+  const isStreamingCompaction = isStreaming && isCompacting;
 
   // Use Start Here hook for final assistant messages
   const {
@@ -120,7 +124,14 @@ export const AssistantMessage: React.FC<AssistantMessageProps> = ({
 
     // Streaming text gets typewriter effect
     if (isStreaming) {
-      return <TypewriterMarkdown deltas={[content]} isComplete={false} />;
+      const contentElement = <TypewriterMarkdown deltas={[content]} isComplete={false} />;
+      
+      // Wrap streaming compaction in special container
+      if (isStreamingCompaction) {
+        return <CompactingMessageContent>{contentElement}</CompactingMessageContent>;
+      }
+      
+      return contentElement;
     }
 
     // Completed text renders as static content
diff --git a/src/components/Messages/CompactingMessageContent.tsx b/src/components/Messages/CompactingMessageContent.tsx
new file mode 100644
index 000000000..36a9dee5e
--- /dev/null
+++ b/src/components/Messages/CompactingMessageContent.tsx
@@ -0,0 +1,63 @@
+import React, { useRef, useEffect } from "react";
+import styled from "@emotion/styled";
+import { CompactionBackground } from "./CompactionBackground";
+
+/**
+ * Wrapper for compaction streaming content
+ * Provides max-height constraint with sticky scroll to bottom
+ */
+
+const Container = styled.div`
+  position: relative;
+  max-height: 300px;
+  overflow-y: auto;
+  overflow-x: hidden;
+  
+  /* Subtle indicator that content is scrollable */
+  &::-webkit-scrollbar {
+    width: 8px;
+  }
+  
+  &::-webkit-scrollbar-track {
+    background: rgba(0, 0, 0, 0.1);
+    border-radius: 4px;
+  }
+  
+  &::-webkit-scrollbar-thumb {
+    background: rgba(var(--color-plan-mode-rgb), 0.3);
+    border-radius: 4px;
+    
+    &:hover {
+      background: rgba(var(--color-plan-mode-rgb), 0.5);
+    }
+  }
+`;
+
+const ContentWrapper = styled.div`
+  position: relative;
+  z-index: 1;
+`;
+
+interface CompactingMessageContentProps {
+  children: React.ReactNode;
+}
+
+export const CompactingMessageContent: React.FC<CompactingMessageContentProps> = ({
+  children,
+}) => {
+  const containerRef = useRef<HTMLDivElement>(null);
+
+  // Auto-scroll to bottom as content streams in
+  useEffect(() => {
+    if (containerRef.current) {
+      containerRef.current.scrollTop = containerRef.current.scrollHeight;
+    }
+  }, [children]);
+
+  return (
+    <Container ref={containerRef}>
+      <CompactionBackground />
+      <ContentWrapper>{children}</ContentWrapper>
+    </Container>
+  );
+};
diff --git a/src/components/Messages/CompactionBackground.tsx b/src/components/Messages/CompactionBackground.tsx
new file mode 100644
index 000000000..d10f96487
--- /dev/null
+++ b/src/components/Messages/CompactionBackground.tsx
@@ -0,0 +1,36 @@
+import styled from "@emotion/styled";
+import { keyframes } from "@emotion/react";
+
+/**
+ * Animated background for compaction streaming
+ * Isolated component for visual effect during compaction
+ */
+
+const shimmer = keyframes`
+  0% {
+    background-position: -200% center;
+  }
+  100% {
+    background-position: 200% center;
+  }
+`;
+
+export const CompactionBackground = styled.div`
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: linear-gradient(
+    90deg,
+    transparent 0%,
+    rgba(var(--color-plan-mode-rgb), 0.08) 25%,
+    rgba(var(--color-plan-mode-rgb), 0.15) 50%,
+    rgba(var(--color-plan-mode-rgb), 0.08) 75%,
+    transparent 100%
+  );
+  background-size: 200% 100%;
+  animation: ${shimmer} 3s ease-in-out infinite;
+  pointer-events: none;
+  border-radius: 6px;
+`;
diff --git a/src/components/Messages/MessageRenderer.tsx b/src/components/Messages/MessageRenderer.tsx
index 6f8f9f2ca..e8824e750 100644
--- a/src/components/Messages/MessageRenderer.tsx
+++ b/src/components/Messages/MessageRenderer.tsx
@@ -31,7 +31,12 @@ export const MessageRenderer = React.memo<MessageRendererProps>(
         );
       case "assistant":
         return (
-          <AssistantMessage message={message} className={className} workspaceId={workspaceId} />
+          <AssistantMessage
+            message={message}
+            className={className}
+            workspaceId={workspaceId}
+            isCompacting={isCompacting}
+          />
         );
       case "tool":
         return <ToolMessage message={message} className={className} workspaceId={workspaceId} />;
diff --git a/src/styles/colors.tsx b/src/styles/colors.tsx
index 82ef85cae..25de72911 100644
--- a/src/styles/colors.tsx
+++ b/src/styles/colors.tsx
@@ -17,6 +17,7 @@ export const GlobalColors = () => (
       :root {
         /* Plan Mode Colors (Blue) */
         --color-plan-mode: hsl(210 70% 40%);
+        --color-plan-mode-rgb: 31, 107, 184; /* RGB equivalent for alpha blending */
         --color-plan-mode-hover: color-mix(in srgb, var(--color-plan-mode), white 20%);
         --color-plan-mode-light: color-mix(in srgb, var(--color-plan-mode) 60%, white);
         --color-plan-mode-alpha: hsl(from var(--color-plan-mode) h s l / 0.1);

From d37192251f0196693761beb40d006d236842a3d0 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:20:30 -0500
Subject: [PATCH 06/37] Fix formatting

---
 src/components/Messages/AssistantMessage.tsx         |  4 ++--
 src/components/Messages/CompactingMessageContent.tsx | 12 +++++-------
 2 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/src/components/Messages/AssistantMessage.tsx b/src/components/Messages/AssistantMessage.tsx
index 99de6e07b..3fdcbaaf3 100644
--- a/src/components/Messages/AssistantMessage.tsx
+++ b/src/components/Messages/AssistantMessage.tsx
@@ -125,12 +125,12 @@ export const AssistantMessage: React.FC<AssistantMessageProps> = ({
     // Streaming text gets typewriter effect
     if (isStreaming) {
       const contentElement = <TypewriterMarkdown deltas={[content]} isComplete={false} />;
-      
+
       // Wrap streaming compaction in special container
       if (isStreamingCompaction) {
         return <CompactingMessageContent>{contentElement}</CompactingMessageContent>;
       }
-      
+
       return contentElement;
     }
 
diff --git a/src/components/Messages/CompactingMessageContent.tsx b/src/components/Messages/CompactingMessageContent.tsx
index 36a9dee5e..c70f921eb 100644
--- a/src/components/Messages/CompactingMessageContent.tsx
+++ b/src/components/Messages/CompactingMessageContent.tsx
@@ -12,21 +12,21 @@ const Container = styled.div`
   max-height: 300px;
   overflow-y: auto;
   overflow-x: hidden;
-  
+
   /* Subtle indicator that content is scrollable */
   &::-webkit-scrollbar {
     width: 8px;
   }
-  
+
   &::-webkit-scrollbar-track {
     background: rgba(0, 0, 0, 0.1);
     border-radius: 4px;
   }
-  
+
   &::-webkit-scrollbar-thumb {
     background: rgba(var(--color-plan-mode-rgb), 0.3);
     border-radius: 4px;
-    
+
     &:hover {
       background: rgba(var(--color-plan-mode-rgb), 0.5);
     }
@@ -42,9 +42,7 @@ interface CompactingMessageContentProps {
   children: React.ReactNode;
 }
 
-export const CompactingMessageContent: React.FC<CompactingMessageContentProps> = ({
-  children,
-}) => {
+export const CompactingMessageContent: React.FC<CompactingMessageContentProps> = ({ children }) => {
   const containerRef = useRef<HTMLDivElement>(null);
 
   // Auto-scroll to bottom as content streams in

From 8b166340bac0fbc33775ff5c414fe38a8452bb93 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:25:42 -0500
Subject: [PATCH 07/37] =?UTF-8?q?=F0=9F=A4=96=20Fix=20compaction=20backgro?=
 =?UTF-8?q?und=20to=20cover=20full=20message=20area?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Move CompactionBackground from content wrapper to MessageWindow level:
- Added backgroundEffect prop to MessageWindow for flexible background effects
- Set MessageBlock to position: relative for absolute background positioning
- Added z-index to MessageHeader and MessageContent to layer above background
- CompactionBackground now covers entire message area, not just text content
- Removed CompactionBackground from CompactingMessageContent (now at window level)

This fixes the uncomfortable rectangular border effect by extending
the shimmer animation to cover the full message window.

Generated with cmux
---
 src/components/Messages/AssistantMessage.tsx       |  2 ++
 .../Messages/CompactingMessageContent.tsx          | 14 +-------------
 src/components/Messages/MessageWindow.tsx          |  8 ++++++++
 src/test-temp-x2vNLl/test-repo                     |  1 +
 4 files changed, 12 insertions(+), 13 deletions(-)
 create mode 160000 src/test-temp-x2vNLl/test-repo

diff --git a/src/components/Messages/AssistantMessage.tsx b/src/components/Messages/AssistantMessage.tsx
index 3fdcbaaf3..e0c9071d0 100644
--- a/src/components/Messages/AssistantMessage.tsx
+++ b/src/components/Messages/AssistantMessage.tsx
@@ -9,6 +9,7 @@ import { useStartHere } from "@/hooks/useStartHere";
 import { COMPACTED_EMOJI } from "@/constants/ui";
 import { ModelDisplay } from "./ModelDisplay";
 import { CompactingMessageContent } from "./CompactingMessageContent";
+import { CompactionBackground } from "./CompactionBackground";
 
 const RawContent = styled.pre`
   font-family: var(--font-monospace);
@@ -165,6 +166,7 @@ export const AssistantMessage: React.FC<AssistantMessageProps> = ({
         message={message}
         buttons={buttons}
         className={className}
+        backgroundEffect={isStreamingCompaction ? <CompactionBackground /> : undefined}
       >
         {renderContent()}
       </MessageWindow>
diff --git a/src/components/Messages/CompactingMessageContent.tsx b/src/components/Messages/CompactingMessageContent.tsx
index c70f921eb..2c4fa8dcc 100644
--- a/src/components/Messages/CompactingMessageContent.tsx
+++ b/src/components/Messages/CompactingMessageContent.tsx
@@ -1,6 +1,5 @@
 import React, { useRef, useEffect } from "react";
 import styled from "@emotion/styled";
-import { CompactionBackground } from "./CompactionBackground";
 
 /**
  * Wrapper for compaction streaming content
@@ -8,7 +7,6 @@ import { CompactionBackground } from "./CompactionBackground";
  */
 
 const Container = styled.div`
-  position: relative;
   max-height: 300px;
   overflow-y: auto;
   overflow-x: hidden;
@@ -33,11 +31,6 @@ const Container = styled.div`
   }
 `;
 
-const ContentWrapper = styled.div`
-  position: relative;
-  z-index: 1;
-`;
-
 interface CompactingMessageContentProps {
   children: React.ReactNode;
 }
@@ -52,10 +45,5 @@ export const CompactingMessageContent: React.FC<CompactingMessageContentProps> =
     }
   }, [children]);
 
-  return (
-    <Container ref={containerRef}>
-      <CompactionBackground />
-      <ContentWrapper>{children}</ContentWrapper>
-    </Container>
-  );
+  return <Container ref={containerRef}>{children}</Container>;
 };
diff --git a/src/components/Messages/MessageWindow.tsx b/src/components/Messages/MessageWindow.tsx
index 1e4edf2de..b2e30acf5 100644
--- a/src/components/Messages/MessageWindow.tsx
+++ b/src/components/Messages/MessageWindow.tsx
@@ -7,6 +7,7 @@ import { formatTimestamp } from "@/utils/ui/dateTime";
 import { TooltipWrapper, Tooltip } from "../Tooltip";
 
 const MessageBlock = styled.div<{ borderColor: string; backgroundColor?: string }>`
+  position: relative;
   margin-bottom: 15px;
   margin-top: 15px;
   background: ${(props) => props.backgroundColor ?? "#1e1e1e"};
@@ -16,6 +17,8 @@ const MessageBlock = styled.div<{ borderColor: string; backgroundColor?: string
 `;
 
 const MessageHeader = styled.div`
+  position: relative;
+  z-index: 1;
   padding: 8px 12px;
   background: rgba(255, 255, 255, 0.05);
   border-bottom: 1px solid rgba(255, 255, 255, 0.1);
@@ -51,6 +54,8 @@ const ButtonGroup = styled.div`
 `;
 
 const MessageContent = styled.div`
+  position: relative;
+  z-index: 1;
   padding: 12px;
 `;
 
@@ -85,6 +90,7 @@ interface MessageWindowProps {
   children: ReactNode;
   className?: string;
   rightLabel?: ReactNode;
+  backgroundEffect?: ReactNode; // Optional background effect (e.g., animation)
 }
 
 export const MessageWindow: React.FC<MessageWindowProps> = ({
@@ -96,6 +102,7 @@ export const MessageWindow: React.FC<MessageWindowProps> = ({
   children,
   className,
   rightLabel,
+  backgroundEffect,
 }) => {
   const [showJson, setShowJson] = useState(false);
 
@@ -111,6 +118,7 @@ export const MessageWindow: React.FC<MessageWindowProps> = ({
 
   return (
     <MessageBlock borderColor={borderColor} backgroundColor={backgroundColor} className={className}>
+      {backgroundEffect}
       <MessageHeader>
         <LeftSection>
           <MessageTypeLabel>{label}</MessageTypeLabel>
diff --git a/src/test-temp-x2vNLl/test-repo b/src/test-temp-x2vNLl/test-repo
new file mode 160000
index 000000000..fea2254cc
--- /dev/null
+++ b/src/test-temp-x2vNLl/test-repo
@@ -0,0 +1 @@
+Subproject commit fea2254cc0d5ebb228eb185268af29c9f12cb7ac

From 9ce7bed06746f0ac6f40efdc4bd3040b87108e65 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:26:48 -0500
Subject: [PATCH 08/37] =?UTF-8?q?=F0=9F=A4=96=20Change=20compaction=20effe?=
 =?UTF-8?q?ct=20to=20green=20laser=20scanning?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Replace horizontal shimmer with futuristic green laser scanning effect:
- Vertical bar sweeps back and forth across the message window
- Green color (rgba 34, 197, 94) with gradient fade
- Box shadow for glow effect
- 2.5s scan cycle with ease-in-out timing
- Refactored to proper React component structure

This creates a more futuristic, sci-fi feel that better communicates
the active compaction process.

Generated with cmux
---
 .../Messages/CompactionBackground.tsx         | 46 ++++++++++++++-----
 src/test-temp-x2vNLl/test-repo                |  1 -
 src/test-temp-zbpEr8/test-repo                |  1 +
 3 files changed, 35 insertions(+), 13 deletions(-)
 delete mode 160000 src/test-temp-x2vNLl/test-repo
 create mode 160000 src/test-temp-zbpEr8/test-repo

diff --git a/src/components/Messages/CompactionBackground.tsx b/src/components/Messages/CompactionBackground.tsx
index d10f96487..f47bff97a 100644
--- a/src/components/Messages/CompactionBackground.tsx
+++ b/src/components/Messages/CompactionBackground.tsx
@@ -1,36 +1,58 @@
+import React from "react";
 import styled from "@emotion/styled";
 import { keyframes } from "@emotion/react";
 
 /**
  * Animated background for compaction streaming
- * Isolated component for visual effect during compaction
+ * Green laser scanning effect - futuristic vertical bar sweeping back and forth
  */
 
-const shimmer = keyframes`
+const scan = keyframes`
   0% {
-    background-position: -200% center;
+    left: -10%;
+  }
+  50% {
+    left: 110%;
   }
   100% {
-    background-position: 200% center;
+    left: -10%;
   }
 `;
 
-export const CompactionBackground = styled.div`
+const Container = styled.div`
   position: absolute;
   top: 0;
   left: 0;
   right: 0;
   bottom: 0;
+  overflow: hidden;
+  pointer-events: none;
+  border-radius: 6px;
+`;
+
+const LaserBar = styled.div`
+  position: absolute;
+  top: 0;
+  bottom: 0;
+  width: 80px;
   background: linear-gradient(
     90deg,
     transparent 0%,
-    rgba(var(--color-plan-mode-rgb), 0.08) 25%,
-    rgba(var(--color-plan-mode-rgb), 0.15) 50%,
-    rgba(var(--color-plan-mode-rgb), 0.08) 75%,
+    rgba(34, 197, 94, 0.05) 20%,
+    rgba(34, 197, 94, 0.15) 40%,
+    rgba(34, 197, 94, 0.25) 50%,
+    rgba(34, 197, 94, 0.15) 60%,
+    rgba(34, 197, 94, 0.05) 80%,
     transparent 100%
   );
-  background-size: 200% 100%;
-  animation: ${shimmer} 3s ease-in-out infinite;
-  pointer-events: none;
-  border-radius: 6px;
+  box-shadow: 0 0 20px rgba(34, 197, 94, 0.3);
+  animation: ${scan} 2.5s ease-in-out infinite;
 `;
+
+export const CompactionBackground: React.FC = () => {
+  return (
+    <Container>
+      <LaserBar />
+    </Container>
+  );
+};
diff --git a/src/test-temp-x2vNLl/test-repo b/src/test-temp-x2vNLl/test-repo
deleted file mode 160000
index fea2254cc..000000000
--- a/src/test-temp-x2vNLl/test-repo
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit fea2254cc0d5ebb228eb185268af29c9f12cb7ac
diff --git a/src/test-temp-zbpEr8/test-repo b/src/test-temp-zbpEr8/test-repo
new file mode 160000
index 000000000..0f63a0b07
--- /dev/null
+++ b/src/test-temp-zbpEr8/test-repo
@@ -0,0 +1 @@
+Subproject commit 0f63a0b07d6ad2443b04f1df017c8e19205a66e7

From a86085f43d7414767bc7e382c01489566d2c43a4 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:31:28 -0500
Subject: [PATCH 09/37] =?UTF-8?q?=F0=9F=A4=96=20Refine=20compaction=20effe?=
 =?UTF-8?q?ct=20to=20subtle=20gradient=20wave?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Replace tacky laser scanning with elegant gradient wave:
- Smooth gradient using plan-mode color variables (matches theme)
- Single directional sweep (left to right, 3s cycle)
- Subtle opacity (0.6) for understated effect
- Uses existing CSS color variables for consistency
- Wider gradient spread (30-70% instead of sharp bar)

Creates a more polished, professional appearance while still
providing visual feedback that compaction is in progress.

Generated with cmux
---
 .../Messages/CompactionBackground.tsx         | 29 ++++++++-----------
 1 file changed, 12 insertions(+), 17 deletions(-)

diff --git a/src/components/Messages/CompactionBackground.tsx b/src/components/Messages/CompactionBackground.tsx
index f47bff97a..0c355836b 100644
--- a/src/components/Messages/CompactionBackground.tsx
+++ b/src/components/Messages/CompactionBackground.tsx
@@ -4,18 +4,15 @@ import { keyframes } from "@emotion/react";
 
 /**
  * Animated background for compaction streaming
- * Green laser scanning effect - futuristic vertical bar sweeping back and forth
+ * Subtle gradient wave effect that sweeps across the message
  */
 
-const scan = keyframes`
+const sweep = keyframes`
   0% {
-    left: -10%;
-  }
-  50% {
-    left: 110%;
+    transform: translateX(-100%);
   }
   100% {
-    left: -10%;
+    transform: translateX(200%);
   }
 `;
 
@@ -30,29 +27,27 @@ const Container = styled.div`
   border-radius: 6px;
 `;
 
-const LaserBar = styled.div`
+const GradientWave = styled.div`
   position: absolute;
   top: 0;
   bottom: 0;
-  width: 80px;
+  width: 100%;
   background: linear-gradient(
     90deg,
     transparent 0%,
-    rgba(34, 197, 94, 0.05) 20%,
-    rgba(34, 197, 94, 0.15) 40%,
-    rgba(34, 197, 94, 0.25) 50%,
-    rgba(34, 197, 94, 0.15) 60%,
-    rgba(34, 197, 94, 0.05) 80%,
+    var(--color-plan-mode-alpha) 30%,
+    var(--color-plan-mode-alpha-hover) 50%,
+    var(--color-plan-mode-alpha) 70%,
     transparent 100%
   );
-  box-shadow: 0 0 20px rgba(34, 197, 94, 0.3);
-  animation: ${scan} 2.5s ease-in-out infinite;
+  animation: ${sweep} 3s ease-in-out infinite;
+  opacity: 0.6;
 `;
 
 export const CompactionBackground: React.FC = () => {
   return (
     <Container>
-      <LaserBar />
+      <GradientWave />
     </Container>
   );
 };

From ea7eb232ae7d855c684782300eebb1d8acca7e48 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:32:48 -0500
Subject: [PATCH 10/37] Make compaction gradient more prominent

Increase visibility of gradient wave effect:
- Increase opacity from 0.6 to 1.0
- Use stronger color-mix for center (25% plan-mode color)
- Tighter gradient spread (25-75% instead of 30-70%)

Effect is now more noticeable while still being elegant.

Generated with cmux
---
 src/components/Messages/CompactionBackground.tsx | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/components/Messages/CompactionBackground.tsx b/src/components/Messages/CompactionBackground.tsx
index 0c355836b..cb24f19fe 100644
--- a/src/components/Messages/CompactionBackground.tsx
+++ b/src/components/Messages/CompactionBackground.tsx
@@ -35,13 +35,13 @@ const GradientWave = styled.div`
   background: linear-gradient(
     90deg,
     transparent 0%,
-    var(--color-plan-mode-alpha) 30%,
-    var(--color-plan-mode-alpha-hover) 50%,
-    var(--color-plan-mode-alpha) 70%,
+    var(--color-plan-mode-alpha-hover) 25%,
+    color-mix(in srgb, var(--color-plan-mode) 25%, transparent) 50%,
+    var(--color-plan-mode-alpha-hover) 75%,
     transparent 100%
   );
   animation: ${sweep} 3s ease-in-out infinite;
-  opacity: 0.6;
+  opacity: 1;
 `;
 
 export const CompactionBackground: React.FC = () => {

From 5380f7ce13d8f61bc62e4bf646dc2ab1cb3cdfed Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:36:00 -0500
Subject: [PATCH 11/37] =?UTF-8?q?=F0=9F=A4=96=20Polish=20compaction=20grad?=
 =?UTF-8?q?ient=20with=20layered=20effects?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Add multi-layered gradient for more polished appearance:
- BaseGlow: Subtle pulsing radial gradient (provides depth)
- GradientWave: Main sweeping gradient with slight blur (smooth motion)
- HighlightWave: Crisp highlight that follows the main wave (adds definition)

Visual improvements:
- Smoother cubic-bezier easing for more natural motion
- Multiple gradient stops for better color distribution
- Slight blur on main wave for softer appearance
- Pulsing base glow synced to 2s cycle (complements 3s sweep)

Creates a more premium, polished look with depth and dimension.

Generated with cmux
---
 .../Messages/CompactionBackground.tsx         | 49 +++++++++++++++++--
 1 file changed, 44 insertions(+), 5 deletions(-)

diff --git a/src/components/Messages/CompactionBackground.tsx b/src/components/Messages/CompactionBackground.tsx
index cb24f19fe..9a6ec5e5e 100644
--- a/src/components/Messages/CompactionBackground.tsx
+++ b/src/components/Messages/CompactionBackground.tsx
@@ -4,7 +4,7 @@ import { keyframes } from "@emotion/react";
 
 /**
  * Animated background for compaction streaming
- * Subtle gradient wave effect that sweeps across the message
+ * Multi-layered gradient wave with subtle glow for polished appearance
  */
 
 const sweep = keyframes`
@@ -16,6 +16,15 @@ const sweep = keyframes`
   }
 `;
 
+const pulse = keyframes`
+  0%, 100% {
+    opacity: 0.3;
+  }
+  50% {
+    opacity: 0.5;
+  }
+`;
+
 const Container = styled.div`
   position: absolute;
   top: 0;
@@ -27,6 +36,16 @@ const Container = styled.div`
   border-radius: 6px;
 `;
 
+const BaseGlow = styled.div`
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: radial-gradient(ellipse at center, var(--color-plan-mode-alpha) 0%, transparent 70%);
+  animation: ${pulse} 2s ease-in-out infinite;
+`;
+
 const GradientWave = styled.div`
   position: absolute;
   top: 0;
@@ -35,19 +54,39 @@ const GradientWave = styled.div`
   background: linear-gradient(
     90deg,
     transparent 0%,
-    var(--color-plan-mode-alpha-hover) 25%,
+    var(--color-plan-mode-alpha) 20%,
+    color-mix(in srgb, var(--color-plan-mode) 20%, transparent) 40%,
     color-mix(in srgb, var(--color-plan-mode) 25%, transparent) 50%,
-    var(--color-plan-mode-alpha-hover) 75%,
+    color-mix(in srgb, var(--color-plan-mode) 20%, transparent) 60%,
+    var(--color-plan-mode-alpha) 80%,
+    transparent 100%
+  );
+  animation: ${sweep} 3s cubic-bezier(0.4, 0, 0.6, 1) infinite;
+  filter: blur(1px);
+`;
+
+const HighlightWave = styled.div`
+  position: absolute;
+  top: 0;
+  bottom: 0;
+  width: 100%;
+  background: linear-gradient(
+    90deg,
+    transparent 0%,
+    transparent 35%,
+    var(--color-plan-mode-alpha-hover) 50%,
+    transparent 65%,
     transparent 100%
   );
-  animation: ${sweep} 3s ease-in-out infinite;
-  opacity: 1;
+  animation: ${sweep} 3s cubic-bezier(0.4, 0, 0.6, 1) infinite;
 `;
 
 export const CompactionBackground: React.FC = () => {
   return (
     <Container>
+      <BaseGlow />
       <GradientWave />
+      <HighlightWave />
     </Container>
   );
 };

From 0be450f3f2a65d654430ab095a7e333b087416dc Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:37:55 -0500
Subject: [PATCH 12/37] =?UTF-8?q?=F0=9F=A4=96=20Make=20compaction=20gradie?=
 =?UTF-8?q?nt=20sweep=20continuously?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Improve animation smoothness and consistency:
- Wider gradient waves (150% width) so always visible during sweep
- Adjusted translate range (-50% to 100%) for seamless loop
- Changed to linear timing for consistent, predictable motion
- Slowed to 4s cycle for more relaxed, satisfying pace
- Gradient stops repositioned for continuous presence

The wave now walks smoothly across without start/stop gaps,
creating a more satisfying, meditative effect.

Generated with cmux
---
 .../Messages/CompactionBackground.tsx         | 30 +++++++++----------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/src/components/Messages/CompactionBackground.tsx b/src/components/Messages/CompactionBackground.tsx
index 9a6ec5e5e..581020c2a 100644
--- a/src/components/Messages/CompactionBackground.tsx
+++ b/src/components/Messages/CompactionBackground.tsx
@@ -9,10 +9,10 @@ import { keyframes } from "@emotion/react";
 
 const sweep = keyframes`
   0% {
-    transform: translateX(-100%);
+    transform: translateX(-50%);
   }
   100% {
-    transform: translateX(200%);
+    transform: translateX(100%);
   }
 `;
 
@@ -50,18 +50,18 @@ const GradientWave = styled.div`
   position: absolute;
   top: 0;
   bottom: 0;
-  width: 100%;
+  width: 150%;
   background: linear-gradient(
     90deg,
-    transparent 0%,
-    var(--color-plan-mode-alpha) 20%,
-    color-mix(in srgb, var(--color-plan-mode) 20%, transparent) 40%,
-    color-mix(in srgb, var(--color-plan-mode) 25%, transparent) 50%,
-    color-mix(in srgb, var(--color-plan-mode) 20%, transparent) 60%,
-    var(--color-plan-mode-alpha) 80%,
+    var(--color-plan-mode-alpha) 0%,
+    color-mix(in srgb, var(--color-plan-mode) 20%, transparent) 20%,
+    color-mix(in srgb, var(--color-plan-mode) 25%, transparent) 33%,
+    color-mix(in srgb, var(--color-plan-mode) 20%, transparent) 46%,
+    var(--color-plan-mode-alpha) 60%,
+    transparent 80%,
     transparent 100%
   );
-  animation: ${sweep} 3s cubic-bezier(0.4, 0, 0.6, 1) infinite;
+  animation: ${sweep} 4s linear infinite;
   filter: blur(1px);
 `;
 
@@ -69,16 +69,16 @@ const HighlightWave = styled.div`
   position: absolute;
   top: 0;
   bottom: 0;
-  width: 100%;
+  width: 150%;
   background: linear-gradient(
     90deg,
     transparent 0%,
-    transparent 35%,
-    var(--color-plan-mode-alpha-hover) 50%,
-    transparent 65%,
+    transparent 25%,
+    var(--color-plan-mode-alpha-hover) 33%,
+    transparent 41%,
     transparent 100%
   );
-  animation: ${sweep} 3s cubic-bezier(0.4, 0, 0.6, 1) infinite;
+  animation: ${sweep} 4s linear infinite;
 `;
 
 export const CompactionBackground: React.FC = () => {

From a42c9d79aec765e467ca54a9c40a25e57ee657c9 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:41:23 -0500
Subject: [PATCH 13/37] =?UTF-8?q?=F0=9F=A4=96=20Enhance=20compaction=20bac?=
 =?UTF-8?q?kground=20with=20shimmer=20and=20particle=20effects?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Replace static gradient wave with more dynamic animation:
- Animated multi-directional gradient (400% size, 8s cycle)
- Fast-moving shimmer layer (3s horizontal sweep with white highlight)
- 8 floating particles with varied timing for organic movement

Technical approach:
- Background gradient animates position for smooth color flow
- Shimmer uses background-position animation (GPU-accelerated)
- Particles use transform: translate for float effect
- All animations staggered with different delays/durations

Visual improvements over previous version:
- More fluid motion (multiple animation cycles at different speeds)
- Shimmer adds light-reflection feel
- Particles add depth and activity
- Less predictable/monotonous than single linear sweep

Inspired by modern loading animations from uiverse.io, CodePen
shimmer effects, and animated gradient patterns.
---
 .../Messages/CompactionBackground.tsx         | 117 ++++++++++++------
 1 file changed, 82 insertions(+), 35 deletions(-)

diff --git a/src/components/Messages/CompactionBackground.tsx b/src/components/Messages/CompactionBackground.tsx
index 581020c2a..6590b3517 100644
--- a/src/components/Messages/CompactionBackground.tsx
+++ b/src/components/Messages/CompactionBackground.tsx
@@ -4,25 +4,47 @@ import { keyframes } from "@emotion/react";
 
 /**
  * Animated background for compaction streaming
- * Multi-layered gradient wave with subtle glow for polished appearance
+ * Shimmer effect with moving gradient and particles for dynamic appearance
  */
 
-const sweep = keyframes`
+const shimmer = keyframes`
   0% {
-    transform: translateX(-50%);
+    background-position: -1000px 0;
   }
   100% {
-    transform: translateX(100%);
+    background-position: 1000px 0;
   }
 `;
 
-const pulse = keyframes`
+const gradientMove = keyframes`
+  0% {
+    background-position: 0% 50%;
+  }
+  50% {
+    background-position: 100% 50%;
+  }
+  100% {
+    background-position: 0% 50%;
+  }
+`;
+
+const float = keyframes`
   0%, 100% {
-    opacity: 0.3;
+    transform: translateY(0) translateX(0);
+    opacity: 0.4;
+  }
+  25% {
+    transform: translateY(-10px) translateX(5px);
+    opacity: 0.7;
   }
   50% {
+    transform: translateY(-15px) translateX(-5px);
     opacity: 0.5;
   }
+  75% {
+    transform: translateY(-8px) translateX(3px);
+    opacity: 0.6;
+  }
 `;
 
 const Container = styled.div`
@@ -36,57 +58,82 @@ const Container = styled.div`
   border-radius: 6px;
 `;
 
-const BaseGlow = styled.div`
+const AnimatedGradient = styled.div`
   position: absolute;
   top: 0;
   left: 0;
   right: 0;
   bottom: 0;
-  background: radial-gradient(ellipse at center, var(--color-plan-mode-alpha) 0%, transparent 70%);
-  animation: ${pulse} 2s ease-in-out infinite;
-`;
-
-const GradientWave = styled.div`
-  position: absolute;
-  top: 0;
-  bottom: 0;
-  width: 150%;
   background: linear-gradient(
-    90deg,
-    var(--color-plan-mode-alpha) 0%,
-    color-mix(in srgb, var(--color-plan-mode) 20%, transparent) 20%,
-    color-mix(in srgb, var(--color-plan-mode) 25%, transparent) 33%,
-    color-mix(in srgb, var(--color-plan-mode) 20%, transparent) 46%,
-    var(--color-plan-mode-alpha) 60%,
-    transparent 80%,
-    transparent 100%
+    -45deg,
+    var(--color-plan-mode-alpha),
+    color-mix(in srgb, var(--color-plan-mode) 30%, transparent),
+    var(--color-plan-mode-alpha),
+    color-mix(in srgb, var(--color-plan-mode) 25%, transparent)
   );
-  animation: ${sweep} 4s linear infinite;
-  filter: blur(1px);
+  background-size: 400% 400%;
+  animation: ${gradientMove} 8s ease infinite;
+  opacity: 0.4;
 `;
 
-const HighlightWave = styled.div`
+const ShimmerLayer = styled.div`
   position: absolute;
   top: 0;
+  left: 0;
+  right: 0;
   bottom: 0;
-  width: 150%;
   background: linear-gradient(
     90deg,
     transparent 0%,
-    transparent 25%,
-    var(--color-plan-mode-alpha-hover) 33%,
-    transparent 41%,
+    transparent 40%,
+    rgba(255, 255, 255, 0.15) 50%,
+    transparent 60%,
     transparent 100%
   );
-  animation: ${sweep} 4s linear infinite;
+  background-size: 1000px 100%;
+  animation: ${shimmer} 3s infinite linear;
+`;
+
+const Particle = styled.div<{ delay: number; duration: number; left: string; size: number }>`
+  position: absolute;
+  left: ${(props) => props.left};
+  bottom: 20%;
+  width: ${(props) => props.size}px;
+  height: ${(props) => props.size}px;
+  background: var(--color-plan-mode);
+  border-radius: 50%;
+  opacity: 0.3;
+  animation: ${float} ${(props) => props.duration}s ease-in-out infinite;
+  animation-delay: ${(props) => props.delay}s;
+  filter: blur(2px);
 `;
 
 export const CompactionBackground: React.FC = () => {
+  // Generate particles with different properties for organic feel
+  const particles = [
+    { delay: 0, duration: 4, left: "10%", size: 4 },
+    { delay: 0.5, duration: 5, left: "25%", size: 6 },
+    { delay: 1, duration: 4.5, left: "45%", size: 3 },
+    { delay: 1.5, duration: 5.5, left: "60%", size: 5 },
+    { delay: 0.8, duration: 4.8, left: "75%", size: 4 },
+    { delay: 2, duration: 5.2, left: "85%", size: 3 },
+    { delay: 0.3, duration: 5, left: "35%", size: 5 },
+    { delay: 1.8, duration: 4.3, left: "55%", size: 4 },
+  ];
+
   return (
     <Container>
-      <BaseGlow />
-      <GradientWave />
-      <HighlightWave />
+      <AnimatedGradient />
+      <ShimmerLayer />
+      {particles.map((particle, index) => (
+        <Particle
+          key={index}
+          delay={particle.delay}
+          duration={particle.duration}
+          left={particle.left}
+          size={particle.size}
+        />
+      ))}
     </Container>
   );
 };

From 4eed689df5ee37d7fa7030f2bd55ff5b65b9ec33 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:43:18 -0500
Subject: [PATCH 14/37] =?UTF-8?q?=F0=9F=A4=96=20Add=20[truncated]=20sentin?=
 =?UTF-8?q?el=20for=20interrupted=20compaction?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

When compaction is interrupted (e.g. user presses Ctrl+C), append
"[truncated]" marker on a new line to the partial summary before
saving it.

Implementation:
- Added handleCompactionAbort() method parallel to handleCompactionCompletion()
- Checks if aborted stream was a compaction request (same logic as completion)
- Extracts partial summary text streamed before interruption
- Appends "\n\n[truncated]" to indicate incomplete summary
- Calls performCompaction() with truncated summary

Flow:
1. User interrupts compaction stream (Ctrl+C)
2. StreamManager emits stream-abort event
3. WorkspaceStore.processStreamEvent() receives abort
4. handleCompactionAbort() detects it was compaction
5. Fetches partial summary via aggregator.getCompactionSummary()
6. Adds [truncated] sentinel
7. performCompaction() replaces history with truncated summary

This makes it clear when compaction didn't complete, helping users
understand the summary is partial.
---
 src/stores/WorkspaceStore.ts | 43 ++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/src/stores/WorkspaceStore.ts b/src/stores/WorkspaceStore.ts
index b0c10ec50..e2a41a0be 100644
--- a/src/stores/WorkspaceStore.ts
+++ b/src/stores/WorkspaceStore.ts
@@ -442,6 +442,41 @@ export class WorkspaceStore {
     return true;
   }
 
+  /**
+   * Handle interruption (Ctrl+C) of a compaction stream.
+   * Saves partial summary with [truncated] sentinel.
+   */
+  private handleCompactionAbort(
+    workspaceId: string,
+    aggregator: StreamingMessageAggregator,
+    data: WorkspaceChatMessage
+  ): boolean {
+    // Type guard: only StreamAbortEvent has messageId
+    if (!("messageId" in data)) return false;
+
+    // Check if this was a compaction stream by looking at the last user message
+    const messages = aggregator.getAllMessages();
+    const lastUserMsg = [...messages].reverse().find((m) => m.role === "user");
+
+    if (lastUserMsg?.metadata?.cmuxMetadata?.type !== "compaction-request") {
+      return false;
+    }
+
+    // Extract whatever summary text was streamed before interruption
+    const partialSummary = aggregator.getCompactionSummary(data.messageId);
+    if (!partialSummary) {
+      console.warn("[WorkspaceStore] Compaction aborted but no partial summary found");
+      return false;
+    }
+
+    // Append [truncated] sentinel on new line to indicate incomplete summary
+    const truncatedSummary = partialSummary.trim() + "\n\n[truncated]";
+
+    this.performCompaction(workspaceId, aggregator, data, truncatedSummary);
+    return true;
+  }
+
+
   /**
    * Perform history compaction by replacing chat history with summary message.
    * Type-safe: only called when we've verified data is a StreamEndEvent.
@@ -805,6 +840,14 @@ export class WorkspaceStore {
     if (isStreamAbort(data)) {
       aggregator.clearTokenState(data.messageId);
       aggregator.handleStreamAbort(data);
+
+      // Check if this was a compaction stream that got interrupted
+      if (this.handleCompactionAbort(workspaceId, aggregator, data)) {
+        // Compaction abort handled, don't do normal abort processing
+        return;
+      }
+
+      // Normal abort handling
       this.states.bump(workspaceId);
       this.dispatchResumeCheck(workspaceId);
 

From f5c940f97bf9cc83a7a1a568a3567fbbd1f86eab Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:44:20 -0500
Subject: [PATCH 15/37] =?UTF-8?q?=F0=9F=A4=96=20Reduce=20shimmer=20intensi?=
 =?UTF-8?q?ty=20and=20remove=20particles?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Removed sparkle particles and reduced shimmer opacity from 0.15 to 0.06
for a more subtle compaction background effect.

Changes:
- Reduced ShimmerLayer white opacity: 0.15 → 0.06
- Removed Particle styled component and related float animation
- Removed particle array generation and rendering

The animated gradient and shimmer are now the only visual elements,
providing a cleaner, less busy background during compaction.
---
 .../Messages/CompactionBackground.tsx         | 56 +------------------
 1 file changed, 1 insertion(+), 55 deletions(-)

diff --git a/src/components/Messages/CompactionBackground.tsx b/src/components/Messages/CompactionBackground.tsx
index 6590b3517..5b6013409 100644
--- a/src/components/Messages/CompactionBackground.tsx
+++ b/src/components/Messages/CompactionBackground.tsx
@@ -28,25 +28,6 @@ const gradientMove = keyframes`
   }
 `;
 
-const float = keyframes`
-  0%, 100% {
-    transform: translateY(0) translateX(0);
-    opacity: 0.4;
-  }
-  25% {
-    transform: translateY(-10px) translateX(5px);
-    opacity: 0.7;
-  }
-  50% {
-    transform: translateY(-15px) translateX(-5px);
-    opacity: 0.5;
-  }
-  75% {
-    transform: translateY(-8px) translateX(3px);
-    opacity: 0.6;
-  }
-`;
-
 const Container = styled.div`
   position: absolute;
   top: 0;
@@ -86,7 +67,7 @@ const ShimmerLayer = styled.div`
     90deg,
     transparent 0%,
     transparent 40%,
-    rgba(255, 255, 255, 0.15) 50%,
+    rgba(255, 255, 255, 0.06) 50%,
     transparent 60%,
     transparent 100%
   );
@@ -94,46 +75,11 @@ const ShimmerLayer = styled.div`
   animation: ${shimmer} 3s infinite linear;
 `;
 
-const Particle = styled.div<{ delay: number; duration: number; left: string; size: number }>`
-  position: absolute;
-  left: ${(props) => props.left};
-  bottom: 20%;
-  width: ${(props) => props.size}px;
-  height: ${(props) => props.size}px;
-  background: var(--color-plan-mode);
-  border-radius: 50%;
-  opacity: 0.3;
-  animation: ${float} ${(props) => props.duration}s ease-in-out infinite;
-  animation-delay: ${(props) => props.delay}s;
-  filter: blur(2px);
-`;
-
 export const CompactionBackground: React.FC = () => {
-  // Generate particles with different properties for organic feel
-  const particles = [
-    { delay: 0, duration: 4, left: "10%", size: 4 },
-    { delay: 0.5, duration: 5, left: "25%", size: 6 },
-    { delay: 1, duration: 4.5, left: "45%", size: 3 },
-    { delay: 1.5, duration: 5.5, left: "60%", size: 5 },
-    { delay: 0.8, duration: 4.8, left: "75%", size: 4 },
-    { delay: 2, duration: 5.2, left: "85%", size: 3 },
-    { delay: 0.3, duration: 5, left: "35%", size: 5 },
-    { delay: 1.8, duration: 4.3, left: "55%", size: 4 },
-  ];
-
   return (
     <Container>
       <AnimatedGradient />
       <ShimmerLayer />
-      {particles.map((particle, index) => (
-        <Particle
-          key={index}
-          delay={particle.delay}
-          duration={particle.duration}
-          left={particle.left}
-          size={particle.size}
-        />
-      ))}
     </Container>
   );
 };

From b8c10d8036f8b190da46dd895506e8ea83926ed9 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:46:07 -0500
Subject: [PATCH 16/37] =?UTF-8?q?=F0=9F=A4=96=20Use=20plan-mode=20color=20?=
 =?UTF-8?q?for=20shimmer=20instead=20of=20white?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Changed shimmer scan line from white (rgba(255,255,255,0.06)) to
plan-mode blue (--color-plan-mode-alpha) so it blends better with the
animated gradient background and appears less distinct as a separate
scan line element.
---
 src/components/Messages/CompactionBackground.tsx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/components/Messages/CompactionBackground.tsx b/src/components/Messages/CompactionBackground.tsx
index 5b6013409..65b006032 100644
--- a/src/components/Messages/CompactionBackground.tsx
+++ b/src/components/Messages/CompactionBackground.tsx
@@ -67,7 +67,7 @@ const ShimmerLayer = styled.div`
     90deg,
     transparent 0%,
     transparent 40%,
-    rgba(255, 255, 255, 0.06) 50%,
+    var(--color-plan-mode-alpha) 50%,
     transparent 60%,
     transparent 100%
   );

From 6a109630823f10db3bf58003a0a781baebddf217 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:47:52 -0500
Subject: [PATCH 17/37] =?UTF-8?q?=F0=9F=A4=96=20Fix=20formatting?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/stores/WorkspaceStore.ts | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/stores/WorkspaceStore.ts b/src/stores/WorkspaceStore.ts
index e2a41a0be..e8425115b 100644
--- a/src/stores/WorkspaceStore.ts
+++ b/src/stores/WorkspaceStore.ts
@@ -476,7 +476,6 @@ export class WorkspaceStore {
     return true;
   }
 
-
   /**
    * Perform history compaction by replacing chat history with summary message.
    * Type-safe: only called when we've verified data is a StreamEndEvent.

From 56cbac77d6a2543a0bdd6cc65dae325f87154b7a Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:49:34 -0500
Subject: [PATCH 18/37] =?UTF-8?q?=F0=9F=A4=96=20Remove=20test-temp=20submo?=
 =?UTF-8?q?dule=20and=20add=20.gitignore=20exclusion?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Removed src/test-temp-zbpEr8/test-repo submodule that accidentally
got committed during testing.

Added .gitignore patterns to prevent future test temporary directories
from being committed:
- src/test-temp-*/
- tests/**/test-temp-*/

This prevents similar mistakes where test fixtures create git repos
that get accidentally tracked as submodules.
---
 .gitignore                     | 5 +++++
 src/test-temp-zbpEr8/test-repo | 1 -
 2 files changed, 5 insertions(+), 1 deletion(-)
 delete mode 160000 src/test-temp-zbpEr8/test-repo

diff --git a/.gitignore b/.gitignore
index c32901afa..ba563038b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -90,6 +90,11 @@ CODE_CHANGES.md
 README_COMPACT_HERE.md
 artifacts/
 tests/e2e/tmp/
+
+# Test temporary directories
+src/test-temp-*/
+tests/**/test-temp-*/
+
 runs/
 
 # Python
diff --git a/src/test-temp-zbpEr8/test-repo b/src/test-temp-zbpEr8/test-repo
deleted file mode 160000
index 0f63a0b07..000000000
--- a/src/test-temp-zbpEr8/test-repo
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 0f63a0b07d6ad2443b04f1df017c8e19205a66e7

From 765a029c54c1dbacaadf88bc1b1f8ef935537995 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:53:03 -0500
Subject: [PATCH 19/37] Replace scrolling with fade effect in compacting
 messages

- Remove overflow-y: auto and auto-scroll logic
- Add CSS mask-image gradient for line-by-line fade from top
- Implies content above without janky scroll behavior
---
 .../Messages/CompactingMessageContent.tsx     | 57 ++++++++-----------
 1 file changed, 24 insertions(+), 33 deletions(-)

diff --git a/src/components/Messages/CompactingMessageContent.tsx b/src/components/Messages/CompactingMessageContent.tsx
index 2c4fa8dcc..8fb8f77c9 100644
--- a/src/components/Messages/CompactingMessageContent.tsx
+++ b/src/components/Messages/CompactingMessageContent.tsx
@@ -1,34 +1,34 @@
-import React, { useRef, useEffect } from "react";
+import React from "react";
 import styled from "@emotion/styled";
 
 /**
  * Wrapper for compaction streaming content
- * Provides max-height constraint with sticky scroll to bottom
+ * Provides max-height constraint with fade effect to imply content above
+ * No scrolling - content fades out at the top line by line
  */
 
 const Container = styled.div`
   max-height: 300px;
-  overflow-y: auto;
-  overflow-x: hidden;
-
-  /* Subtle indicator that content is scrollable */
-  &::-webkit-scrollbar {
-    width: 8px;
-  }
-
-  &::-webkit-scrollbar-track {
-    background: rgba(0, 0, 0, 0.1);
-    border-radius: 4px;
-  }
-
-  &::-webkit-scrollbar-thumb {
-    background: rgba(var(--color-plan-mode-rgb), 0.3);
-    border-radius: 4px;
-
-    &:hover {
-      background: rgba(var(--color-plan-mode-rgb), 0.5);
-    }
-  }
+  overflow: hidden;
+  position: relative;
+
+  /* Fade effect: content fades progressively from top to bottom */
+  mask-image: linear-gradient(
+    to bottom,
+    transparent 0%,
+    rgba(0, 0, 0, 0.3) 5%,
+    rgba(0, 0, 0, 0.6) 10%,
+    rgba(0, 0, 0, 0.85) 15%,
+    black 20%
+  );
+  -webkit-mask-image: linear-gradient(
+    to bottom,
+    transparent 0%,
+    rgba(0, 0, 0, 0.3) 5%,
+    rgba(0, 0, 0, 0.6) 10%,
+    rgba(0, 0, 0, 0.85) 15%,
+    black 20%
+  );
 `;
 
 interface CompactingMessageContentProps {
@@ -36,14 +36,5 @@ interface CompactingMessageContentProps {
 }
 
 export const CompactingMessageContent: React.FC<CompactingMessageContentProps> = ({ children }) => {
-  const containerRef = useRef<HTMLDivElement>(null);
-
-  // Auto-scroll to bottom as content streams in
-  useEffect(() => {
-    if (containerRef.current) {
-      containerRef.current.scrollTop = containerRef.current.scrollHeight;
-    }
-  }, [children]);
-
-  return <Container ref={containerRef}>{children}</Container>;
+  return <Container>{children}</Container>;
 };

From a4381e9ed7d73d60038a5ca9652fc1a74af018df Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 19:58:35 -0500
Subject: [PATCH 20/37] Fix compacting message issues

1. Anchor content to bottom of viewport
   - Add flexbox with justify-content: flex-end
   - Keeps newest content visible at bottom as it streams
   - Older content fades at top when exceeding max-height

2. Disable all tools during compaction
   - Set toolPolicy: [] in applyCompactionOverrides
   - Ensures compaction never has tool access regardless of UI mode
   - Add test to verify tools disabled even with base policy
---
 .../Messages/CompactingMessageContent.tsx         |  5 ++++-
 src/utils/messages/compactionOptions.test.ts      | 15 +++++++++++++--
 src/utils/messages/compactionOptions.ts           |  1 +
 3 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/components/Messages/CompactingMessageContent.tsx b/src/components/Messages/CompactingMessageContent.tsx
index 8fb8f77c9..5e349fb69 100644
--- a/src/components/Messages/CompactingMessageContent.tsx
+++ b/src/components/Messages/CompactingMessageContent.tsx
@@ -4,13 +4,16 @@ import styled from "@emotion/styled";
 /**
  * Wrapper for compaction streaming content
  * Provides max-height constraint with fade effect to imply content above
- * No scrolling - content fades out at the top line by line
+ * No scrolling - content stays anchored to bottom, older content fades at top
  */
 
 const Container = styled.div`
   max-height: 300px;
   overflow: hidden;
   position: relative;
+  display: flex;
+  flex-direction: column;
+  justify-content: flex-end; /* Anchor content to bottom */
 
   /* Fade effect: content fades progressively from top to bottom */
   mask-image: linear-gradient(
diff --git a/src/utils/messages/compactionOptions.test.ts b/src/utils/messages/compactionOptions.test.ts
index 0eefa8011..6a413edde 100644
--- a/src/utils/messages/compactionOptions.test.ts
+++ b/src/utils/messages/compactionOptions.test.ts
@@ -58,15 +58,26 @@ describe("applyCompactionOverrides", () => {
     expect(result.maxOutputTokens).toBe(8000);
   });
 
-  it("sets compact mode", () => {
+  it("sets compact mode and disables all tools", () => {
     const compactData: CompactionRequestData = {};
     const result = applyCompactionOverrides(baseOptions, compactData);
 
     expect(result.mode).toBe("compact");
-    // No special toolPolicy for compaction - uses base options
     expect(result.toolPolicy).toEqual([]);
   });
 
+  it("disables all tools even when base options has tool policy", () => {
+    const baseWithTools: SendMessageOptions = {
+      ...baseOptions,
+      toolPolicy: [{ regex_match: "bash", action: "enable" }],
+    };
+    const compactData: CompactionRequestData = {};
+    const result = applyCompactionOverrides(baseWithTools, compactData);
+
+    expect(result.mode).toBe("compact");
+    expect(result.toolPolicy).toEqual([]); // Tools always disabled for compaction
+  });
+
   it("applies all overrides together", () => {
     const compactData: CompactionRequestData = {
       model: "openai:gpt-5",
diff --git a/src/utils/messages/compactionOptions.ts b/src/utils/messages/compactionOptions.ts
index 6f4d6cc40..59ca409cd 100644
--- a/src/utils/messages/compactionOptions.ts
+++ b/src/utils/messages/compactionOptions.ts
@@ -36,5 +36,6 @@ export function applyCompactionOverrides(
     thinkingLevel: isAnthropic ? "off" : baseOptions.thinkingLevel,
     maxOutputTokens: compactData.maxOutputTokens,
     mode: "compact" as const,
+    toolPolicy: [], // Disable all tools during compaction
   };
 }

From c9d45bb8c71bbd460bd0c12e95e66695ff254c86 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:06:53 -0500
Subject: [PATCH 21/37] Add Ctrl+C/Ctrl+A compaction interrupt handling

**Ctrl+C during compaction**: Cancel and restore command
- Interrupts stream
- Removes compaction request + partial summary from history
- Restores original /compact command to input for re-editing

**Ctrl+A during compaction**: Accept early with [truncated]
- Uses existing handleCompactionAbort flow
- Adds [truncated] sentinel to partial summary
- Performs compaction with incomplete summary

**Implementation**:
- Created src/utils/compaction/handler.ts to consolidate logic
- Added ACCEPT_EARLY_COMPACTION keybind (Ctrl+A)
- Extended ChatInputAPI with restoreText() method
- Updated useAIViewKeybinds to handle both cases
- Updated UI hints in ChatInput, AIView, UserMessage

**Architecture**:
- Compaction logic grouped in dedicated handler module
- Minimal indirection - direct calls to IPC layer
- Uses percentage-based truncateHistory API for removal
---
 src/components/AIView.tsx               |  7 ++-
 src/components/ChatInput.tsx            | 16 ++++-
 src/components/Messages/UserMessage.tsx |  2 +-
 src/hooks/useAIViewKeybinds.ts          | 31 +++++++++-
 src/utils/compaction/handler.ts         | 79 +++++++++++++++++++++++++
 src/utils/ui/keybinds.ts                |  3 +
 6 files changed, 131 insertions(+), 7 deletions(-)
 create mode 100644 src/utils/compaction/handler.ts

diff --git a/src/components/AIView.tsx b/src/components/AIView.tsx
index e4e94dbb7..79f3d2a34 100644
--- a/src/components/AIView.tsx
+++ b/src/components/AIView.tsx
@@ -345,6 +345,7 @@ const AIViewInner: React.FC<AIViewProps> = ({
     chatInputAPI,
     jumpToBottom,
     handleOpenTerminal,
+    aggregator,
   });
 
   // Clear editing state if the message being edited no longer exists
@@ -523,7 +524,11 @@ const AIViewInner: React.FC<AIViewProps> = ({
                       ? `${getModelName(currentModel)} streaming...`
                       : "streaming..."
                 }
-                cancelText={`hit ${formatKeybind(KEYBINDS.INTERRUPT_STREAM)} to cancel`}
+                cancelText={
+                  isCompacting
+                    ? `${formatKeybind(KEYBINDS.INTERRUPT_STREAM)} cancel | ${formatKeybind(KEYBINDS.ACCEPT_EARLY_COMPACTION)} accept early`
+                    : `hit ${formatKeybind(KEYBINDS.INTERRUPT_STREAM)} to cancel`
+                }
                 tokenCount={
                   activeStreamMessageId
                     ? aggregator.getStreamingTokenCount(activeStreamMessageId)
diff --git a/src/components/ChatInput.tsx b/src/components/ChatInput.tsx
index a5f0523d7..f9369c88b 100644
--- a/src/components/ChatInput.tsx
+++ b/src/components/ChatInput.tsx
@@ -120,6 +120,7 @@ const ModelDisplayWrapper = styled.div`
 
 export interface ChatInputAPI {
   focus: () => void;
+  restoreText: (text: string) => void;
 }
 
 export interface ChatInputProps {
@@ -430,12 +431,21 @@ export const ChatInput: React.FC<ChatInputProps> = ({
     });
   }, []);
 
+  // Method to restore text to input (used by compaction cancel)
+  const restoreText = useCallback((text: string) => {
+    setInput(text);
+    focusMessageInput();
+  }, [focusMessageInput]);
+
   // Provide API to parent via callback
   useEffect(() => {
     if (onReady) {
-      onReady({ focus: focusMessageInput });
+      onReady({ 
+        focus: focusMessageInput,
+        restoreText,
+      });
     }
-  }, [onReady, focusMessageInput]);
+  }, [onReady, focusMessageInput, restoreText]);
 
   useEffect(() => {
     const handleGlobalKeyDown = (event: KeyboardEvent) => {
@@ -948,7 +958,7 @@ export const ChatInput: React.FC<ChatInputProps> = ({
       return `Edit your message... (${formatKeybind(KEYBINDS.CANCEL_EDIT)} to cancel, ${formatKeybind(KEYBINDS.SEND_MESSAGE)} to send)`;
     }
     if (isCompacting) {
-      return `Compacting... (${formatKeybind(KEYBINDS.INTERRUPT_STREAM)} to cancel)`;
+      return `Compacting... (${formatKeybind(KEYBINDS.INTERRUPT_STREAM)} cancel | ${formatKeybind(KEYBINDS.ACCEPT_EARLY_COMPACTION)} accept early)`;
     }
 
     // Build hints for normal input
diff --git a/src/components/Messages/UserMessage.tsx b/src/components/Messages/UserMessage.tsx
index c23739987..1307d4597 100644
--- a/src/components/Messages/UserMessage.tsx
+++ b/src/components/Messages/UserMessage.tsx
@@ -102,7 +102,7 @@ export const UserMessage: React.FC<UserMessageProps> = ({
             onClick: handleEdit,
             disabled: isCompacting,
             tooltip: isCompacting
-              ? `Cannot edit while compacting (press ${formatKeybind(KEYBINDS.INTERRUPT_STREAM)} to cancel)`
+              ? `Cannot edit while compacting (${formatKeybind(KEYBINDS.INTERRUPT_STREAM)} to cancel)`
               : undefined,
           },
         ]
diff --git a/src/hooks/useAIViewKeybinds.ts b/src/hooks/useAIViewKeybinds.ts
index 5dce224d1..bbbca589f 100644
--- a/src/hooks/useAIViewKeybinds.ts
+++ b/src/hooks/useAIViewKeybinds.ts
@@ -7,6 +7,8 @@ import type { ThinkingLevel, ThinkingLevelOn } from "@/types/thinking";
 import { DEFAULT_THINKING_LEVEL } from "@/types/thinking";
 import { getThinkingPolicyForModel } from "@/utils/thinking/policy";
 import { getDefaultModelFromLRU } from "@/hooks/useModelLRU";
+import type { StreamingMessageAggregator } from "@/utils/messages/StreamingMessageAggregator";
+import { isCompactingStream, cancelCompaction } from "@/utils/compaction/handler";
 
 interface UseAIViewKeybindsParams {
   workspaceId: string;
@@ -19,6 +21,7 @@ interface UseAIViewKeybindsParams {
   chatInputAPI: React.RefObject<ChatInputAPI | null>;
   jumpToBottom: () => void;
   handleOpenTerminal: () => void;
+  aggregator: StreamingMessageAggregator; // For compaction detection
 }
 
 /**
@@ -40,13 +43,24 @@ export function useAIViewKeybinds({
   chatInputAPI,
   jumpToBottom,
   handleOpenTerminal,
+  aggregator,
 }: UseAIViewKeybindsParams): void {
   useEffect(() => {
     const handleKeyDown = (e: KeyboardEvent) => {
-      // Interrupt stream works anywhere (even in input fields)
+      // Ctrl+C during compaction: cancel and restore command to input
       if (matchesKeybind(e, KEYBINDS.INTERRUPT_STREAM)) {
         e.preventDefault();
-        // If there's a stream or auto-retry in progress, stop it and disable auto-retry
+        
+        if (canInterrupt && isCompactingStream(aggregator)) {
+          // Special handling for compaction: delete messages and restore command
+          void cancelCompaction(workspaceId, aggregator, (command) => {
+            chatInputAPI.current?.restoreText(command);
+          });
+          setAutoRetry(false);
+          return;
+        }
+        
+        // Normal stream interrupt
         if (canInterrupt || showRetryBarrier) {
           setAutoRetry(false); // User explicitly stopped - don't auto-retry
           void window.api.workspace.interruptStream(workspaceId);
@@ -54,6 +68,18 @@ export function useAIViewKeybinds({
         return;
       }
 
+      // Ctrl+A during compaction: accept early with [truncated] sentinel
+      if (matchesKeybind(e, KEYBINDS.ACCEPT_EARLY_COMPACTION)) {
+        e.preventDefault();
+        
+        if (canInterrupt && isCompactingStream(aggregator)) {
+          // Interrupt stream - this triggers handleCompactionAbort in WorkspaceStore
+          setAutoRetry(false);
+          void window.api.workspace.interruptStream(workspaceId);
+        }
+        return;
+      }
+
       // Focus chat input works anywhere (even in input fields)
       if (matchesKeybind(e, KEYBINDS.FOCUS_CHAT)) {
         e.preventDefault();
@@ -125,5 +151,6 @@ export function useAIViewKeybinds({
     currentWorkspaceThinking,
     setThinkingLevel,
     chatInputAPI,
+    aggregator,
   ]);
 }
diff --git a/src/utils/compaction/handler.ts b/src/utils/compaction/handler.ts
new file mode 100644
index 000000000..0070d722e
--- /dev/null
+++ b/src/utils/compaction/handler.ts
@@ -0,0 +1,79 @@
+/**
+ * Compaction interrupt handling
+ *
+ * Consolidated logic for handling Ctrl+C and Ctrl+A during compaction streams.
+ */
+
+import type { StreamingMessageAggregator } from "@/utils/messages/StreamingMessageAggregator";
+
+/**
+ * Check if the workspace is currently in a compaction stream
+ */
+export function isCompactingStream(aggregator: StreamingMessageAggregator): boolean {
+  const messages = aggregator.getAllMessages();
+  const lastUserMsg = [...messages].reverse().find((m) => m.role === "user");
+  return lastUserMsg?.metadata?.cmuxMetadata?.type === "compaction-request";
+}
+
+/**
+ * Get the original /compact command from the last user message
+ */
+export function getCompactionCommand(aggregator: StreamingMessageAggregator): string | null {
+  const messages = aggregator.getAllMessages();
+  const lastUserMsg = [...messages].reverse().find((m) => m.role === "user");
+
+  if (lastUserMsg?.metadata?.cmuxMetadata?.type !== "compaction-request") {
+    return null;
+  }
+
+  return lastUserMsg.metadata.cmuxMetadata.rawCommand ?? null;
+}
+
+/**
+ * Cancel compaction: interrupt stream, restore state before compaction
+ * 
+ * This removes both the compaction request user message and the partial assistant summary,
+ * leaving the history as it was before /compact was invoked.
+ */
+export async function cancelCompaction(
+  workspaceId: string,
+  aggregator: StreamingMessageAggregator,
+  restoreCommandToInput: (command: string) => void
+): Promise<boolean> {
+  // Get the command before we modify history
+  const command = getCompactionCommand(aggregator);
+  if (!command) {
+    return false;
+  }
+
+  // Get all messages before interrupting
+  const messages = aggregator.getAllMessages();
+  
+  // Find the compaction request message
+  const compactionRequestIndex = messages.findIndex(
+    (m) => m.role === "user" && m.metadata?.cmuxMetadata?.type === "compaction-request"
+  );
+  
+  if (compactionRequestIndex === -1) {
+    return false;
+  }
+
+  // Interrupt the stream first
+  await window.api.workspace.interruptStream(workspaceId);
+
+  // Calculate percentage to keep: everything before the compaction request
+  // After interrupt, we have: [...history, compactionRequest, partialSummary]
+  // We want to keep: [...history]
+  const totalMessages = messages.length + 1; // +1 for partial summary that will be committed
+  const messagesToKeep = compactionRequestIndex;
+  const percentageToKeep = messagesToKeep / totalMessages;
+
+  // Truncate to remove compaction request + partial summary
+  await window.api.workspace.truncateHistory(workspaceId, percentageToKeep);
+
+  // Restore command to input
+  restoreCommandToInput(command);
+
+  return true;
+}
+
diff --git a/src/utils/ui/keybinds.ts b/src/utils/ui/keybinds.ts
index c59de04f5..5cc21e3cf 100644
--- a/src/utils/ui/keybinds.ts
+++ b/src/utils/ui/keybinds.ts
@@ -195,6 +195,9 @@ export const KEYBINDS = {
   /** Interrupt active stream (destructive - stops AI generation) */
   INTERRUPT_STREAM: { key: "c", ctrl: true, macCtrlBehavior: "control" },
 
+  /** Accept partial compaction early (adds [truncated] sentinel) */
+  ACCEPT_EARLY_COMPACTION: { key: "a", ctrl: true, macCtrlBehavior: "control" },
+
   /** Focus chat input */
   FOCUS_INPUT_I: { key: "i" },
 

From 98bbcc2bc138263d83d770580d3d4b88412580e8 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:23:47 -0500
Subject: [PATCH 22/37] =?UTF-8?q?=F0=9F=A4=96=20Fix=20Ctrl+C=20compaction?=
 =?UTF-8?q?=20cancel=20bug=20with=20flag-based=20approach?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

**Problem**: Ctrl+C during compaction resulted in empty chat because both
Ctrl+C (cancel) and Ctrl+A (accept early) called interruptStream, triggering
handleCompactionAbort which would always perform compaction.

**Solution**: Add cancellingCompaction flag to distinguish between the two flows.

**Implementation**:
- WorkspaceStore: Added cancellingCompaction Set and markCompactionCancelling() method
- handleCompactionAbort: Check flag before compaction, skip if set (Ctrl+C path)
- cancelCompaction: Set flag before interrupt, prevent compaction
- useAIViewKeybinds: Pass workspaceStore to cancelCompaction

**Two distinct flows**:
- Ctrl+C: Set flag → interrupt → skip compaction → truncate → restore command
- Ctrl+A: No flag → interrupt → perform compaction with [truncated]

**Benefits**:
- Simple: Single short-lived flag (~10ms), self-cleaning
- Frontend-only: All compaction logic stays in frontend
- Well-commented: Clear explanations for future Assistants

All tests pass (574 unit tests).

_Generated with `cmux`_
---
 src/hooks/useAIViewKeybinds.ts  | 18 +++++++++---
 src/stores/WorkspaceStore.ts    | 43 +++++++++++++++++++++++++++--
 src/utils/compaction/handler.ts | 49 ++++++++++++++++++++++-----------
 3 files changed, 87 insertions(+), 23 deletions(-)

diff --git a/src/hooks/useAIViewKeybinds.ts b/src/hooks/useAIViewKeybinds.ts
index bbbca589f..0fd7384ea 100644
--- a/src/hooks/useAIViewKeybinds.ts
+++ b/src/hooks/useAIViewKeybinds.ts
@@ -9,6 +9,7 @@ import { getThinkingPolicyForModel } from "@/utils/thinking/policy";
 import { getDefaultModelFromLRU } from "@/hooks/useModelLRU";
 import type { StreamingMessageAggregator } from "@/utils/messages/StreamingMessageAggregator";
 import { isCompactingStream, cancelCompaction } from "@/utils/compaction/handler";
+import { useWorkspaceStoreRaw } from "@/stores/WorkspaceStore";
 
 interface UseAIViewKeybindsParams {
   workspaceId: string;
@@ -31,6 +32,8 @@ interface UseAIViewKeybindsParams {
  * - Ctrl+Shift+T: Toggle thinking level
  * - Ctrl+G: Jump to bottom
  * - Ctrl+T: Open terminal
+ * - Ctrl+C (during compaction): Cancel compaction, restore command
+ * - Ctrl+A (during compaction): Accept early with [truncated]
  */
 export function useAIViewKeybinds({
   workspaceId,
@@ -45,22 +48,26 @@ export function useAIViewKeybinds({
   handleOpenTerminal,
   aggregator,
 }: UseAIViewKeybindsParams): void {
+  const workspaceStore = useWorkspaceStoreRaw();
+
   useEffect(() => {
     const handleKeyDown = (e: KeyboardEvent) => {
       // Ctrl+C during compaction: cancel and restore command to input
+      // (different from Ctrl+A which accepts early with [truncated])
       if (matchesKeybind(e, KEYBINDS.INTERRUPT_STREAM)) {
         e.preventDefault();
         
         if (canInterrupt && isCompactingStream(aggregator)) {
-          // Special handling for compaction: delete messages and restore command
-          void cancelCompaction(workspaceId, aggregator, (command) => {
+          // Ctrl+C during compaction: restore original state
+          // Sets flag to prevent handleCompactionAbort from performing compaction
+          void cancelCompaction(workspaceId, aggregator, workspaceStore, (command) => {
             chatInputAPI.current?.restoreText(command);
           });
           setAutoRetry(false);
           return;
         }
         
-        // Normal stream interrupt
+        // Normal stream interrupt (non-compaction)
         if (canInterrupt || showRetryBarrier) {
           setAutoRetry(false); // User explicitly stopped - don't auto-retry
           void window.api.workspace.interruptStream(workspaceId);
@@ -69,11 +76,13 @@ export function useAIViewKeybinds({
       }
 
       // Ctrl+A during compaction: accept early with [truncated] sentinel
+      // (different from Ctrl+C which cancels and restores original state)
       if (matchesKeybind(e, KEYBINDS.ACCEPT_EARLY_COMPACTION)) {
         e.preventDefault();
         
         if (canInterrupt && isCompactingStream(aggregator)) {
-          // Interrupt stream - this triggers handleCompactionAbort in WorkspaceStore
+          // Ctrl+A during compaction: perform compaction with partial summary
+          // No flag set - handleCompactionAbort will perform compaction with [truncated]
           setAutoRetry(false);
           void window.api.workspace.interruptStream(workspaceId);
         }
@@ -152,5 +161,6 @@ export function useAIViewKeybinds({
     setThinkingLevel,
     chatInputAPI,
     aggregator,
+    workspaceStore,
   ]);
 }
diff --git a/src/stores/WorkspaceStore.ts b/src/stores/WorkspaceStore.ts
index e8425115b..dee999aba 100644
--- a/src/stores/WorkspaceStore.ts
+++ b/src/stores/WorkspaceStore.ts
@@ -133,6 +133,11 @@ export class WorkspaceStore {
   // Track model usage (injected dependency for useModelLRU integration)
   private readonly onModelUsed?: (model: string) => void;
 
+  // Track workspaces where compaction is being cancelled (Ctrl+C) vs accepted early (Ctrl+A)
+  // This flag prevents handleCompactionAbort from performing compaction during cancel flow.
+  // Short-lived: exists only between markCompactionCancelling() and handleCompactionAbort().
+  private cancellingCompaction = new Set<string>();
+
   constructor(onModelUsed?: (model: string) => void) {
     this.onModelUsed = onModelUsed;
 
@@ -158,6 +163,25 @@ export class WorkspaceStore {
     );
   }
 
+  /**
+   * Mark a workspace as cancelling compaction (Ctrl+C flow).
+   * 
+   * This flag prevents handleCompactionAbort from performing compaction when the
+   * stream is interrupted via cancelCompaction. Without this flag, both Ctrl+C
+   * (cancel) and Ctrl+A (accept early) would trigger the same abort handler.
+   * 
+   * Flag lifecycle:
+   * 1. cancelCompaction() sets flag before calling interruptStream
+   * 2. handleCompactionAbort() checks flag and skips compaction if set
+   * 3. handleCompactionAbort() cleans up flag immediately
+   * 
+   * The flag exists for ~10ms during the cancel operation and is cleaned up
+   * by the abort handler itself.
+   */
+  markCompactionCancelling(workspaceId: string): void {
+    this.cancellingCompaction.add(workspaceId);
+  }
+
   /**
    * Check if any workspace's recency changed and bump global recency if so.
    * Uses cached recency values from aggregators for O(1) comparison per workspace.
@@ -443,8 +467,13 @@ export class WorkspaceStore {
   }
 
   /**
-   * Handle interruption (Ctrl+C) of a compaction stream.
-   * Saves partial summary with [truncated] sentinel.
+   * Handle interruption of a compaction stream (StreamAbortEvent).
+   * 
+   * Two distinct flows trigger this:
+   * - **Ctrl+A (accept early)**: Perform compaction with [truncated] sentinel
+   * - **Ctrl+C (cancel)**: Skip compaction, let cancelCompaction handle cleanup
+   * 
+   * The cancellingCompaction flag distinguishes between these two flows.
    */
   private handleCompactionAbort(
     workspaceId: string,
@@ -462,7 +491,15 @@ export class WorkspaceStore {
       return false;
     }
 
-    // Extract whatever summary text was streamed before interruption
+    // Ctrl+C flow: Check if compaction is being cancelled
+    // If flag is set, skip compaction and clean up the flag
+    // cancelCompaction() will handle truncation and input restoration
+    if (this.cancellingCompaction.has(workspaceId)) {
+      this.cancellingCompaction.delete(workspaceId);
+      return false; // Return false to skip compaction
+    }
+
+    // Ctrl+A flow: Accept early with [truncated] sentinel
     const partialSummary = aggregator.getCompactionSummary(data.messageId);
     if (!partialSummary) {
       console.warn("[WorkspaceStore] Compaction aborted but no partial summary found");
diff --git a/src/utils/compaction/handler.ts b/src/utils/compaction/handler.ts
index 0070d722e..c34370520 100644
--- a/src/utils/compaction/handler.ts
+++ b/src/utils/compaction/handler.ts
@@ -1,10 +1,13 @@
 /**
  * Compaction interrupt handling
  *
- * Consolidated logic for handling Ctrl+C and Ctrl+A during compaction streams.
+ * Two interrupt flows during compaction:
+ * - Ctrl+C (cancel): Abort compaction, restore original history + command to input
+ * - Ctrl+A (accept early): Complete compaction with [truncated] sentinel
  */
 
 import type { StreamingMessageAggregator } from "@/utils/messages/StreamingMessageAggregator";
+import type { WorkspaceStore } from "@/stores/WorkspaceStore";
 
 /**
  * Check if the workspace is currently in a compaction stream
@@ -30,26 +33,36 @@ export function getCompactionCommand(aggregator: StreamingMessageAggregator): st
 }
 
 /**
- * Cancel compaction: interrupt stream, restore state before compaction
+ * Cancel compaction (Ctrl+C flow)
  * 
- * This removes both the compaction request user message and the partial assistant summary,
- * leaving the history as it was before /compact was invoked.
+ * Aborts the compaction stream and restores state to before /compact was invoked:
+ * - Interrupts stream without performing compaction (via flag)
+ * - Removes compaction request + partial summary from history
+ * - Restores original /compact command to input for re-editing
+ * 
+ * Flow:
+ * 1. Set flag in WorkspaceStore to prevent handleCompactionAbort from compacting
+ * 2. Interrupt stream (triggers StreamAbortEvent)
+ * 3. handleCompactionAbort sees flag, skips compaction, cleans up flag
+ * 4. Truncate history to remove compaction request + partial summary
+ * 5. Restore command to input
  */
 export async function cancelCompaction(
   workspaceId: string,
   aggregator: StreamingMessageAggregator,
+  workspaceStore: WorkspaceStore,
   restoreCommandToInput: (command: string) => void
 ): Promise<boolean> {
-  // Get the command before we modify history
+  // Extract command before modifying history
   const command = getCompactionCommand(aggregator);
   if (!command) {
     return false;
   }
 
-  // Get all messages before interrupting
+  // Get messages snapshot before interrupting
   const messages = aggregator.getAllMessages();
   
-  // Find the compaction request message
+  // Find where compaction request is located
   const compactionRequestIndex = messages.findIndex(
     (m) => m.role === "user" && m.metadata?.cmuxMetadata?.type === "compaction-request"
   );
@@ -58,20 +71,24 @@ export async function cancelCompaction(
     return false;
   }
 
-  // Interrupt the stream first
+  // CRITICAL: Mark workspace as cancelling BEFORE interrupt
+  // This tells handleCompactionAbort to skip compaction (Ctrl+C path vs Ctrl+A path)
+  workspaceStore.markCompactionCancelling(workspaceId);
+
+  // Interrupt stream - triggers StreamAbortEvent → handleCompactionAbort
+  // handleCompactionAbort will see the flag and skip performCompaction
   await window.api.workspace.interruptStream(workspaceId);
 
-  // Calculate percentage to keep: everything before the compaction request
-  // After interrupt, we have: [...history, compactionRequest, partialSummary]
-  // We want to keep: [...history]
-  const totalMessages = messages.length + 1; // +1 for partial summary that will be committed
-  const messagesToKeep = compactionRequestIndex;
-  const percentageToKeep = messagesToKeep / totalMessages;
+  // Calculate truncation: keep everything before compaction request
+  // After interrupt: [...history, compactionRequest, partialSummary]
+  // We want: [...history]
+  const totalMessages = messages.length + 1; // +1 for partial summary committed by interrupt
+  const percentageToKeep = compactionRequestIndex / totalMessages;
 
-  // Truncate to remove compaction request + partial summary
+  // Truncate history to remove compaction artifacts
   await window.api.workspace.truncateHistory(workspaceId, percentageToKeep);
 
-  // Restore command to input
+  // Restore command to input so user can edit and retry
   restoreCommandToInput(command);
 
   return true;

From b058c261cfda0fc0eb3f8c5e1d009361435f0747 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:40:46 -0500
Subject: [PATCH 23/37] =?UTF-8?q?=F0=9F=A4=96=20Fix=20Ctrl+C=20compaction?=
 =?UTF-8?q?=20cancel=20with=20localStorage=20(reload-safe)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

**Problem**: Previous fix (98bbcc2b) used in-memory flag that was lost on reload,
causing compaction to happen anyway after page refresh.

**Root cause**: Flag stored in WorkspaceStore (in-memory) doesn't persist across
reloads. StreamAbortEvent arrives, flag is gone, compaction happens.

**Solution**: Use localStorage to persist cancellation intent across reloads.

**Implementation**:
- Store cancellation marker in localStorage BEFORE calling interruptStream
- Include messageId for freshness verification
- handleCompactionAbort checks localStorage and verifies messageId matches
- Clean up marker after handling (prevents stale data)
- No flag state, no backend changes needed

**Flow**:
1. Ctrl+C: Store {messageId, timestamp} in localStorage
2. Interrupt stream → StreamAbortEvent
3. handleCompactionAbort checks localStorage, verifies messageId
4. If cancelled: skip compaction, clean up marker
5. cancelCompaction truncates history and restores command

**Benefits**:
- Reload-safe: localStorage persists across page refreshes
- MessageId verification ensures freshness (no stale cancellations)
- Simpler than backend changes
- Frontend-only solution

All tests pass (574 unit tests).

_Generated with `cmux`_
---
 src/constants/storage.ts        |  9 ++++++
 src/hooks/useAIViewKeybinds.ts  | 10 ++-----
 src/stores/WorkspaceStore.ts    | 53 ++++++++++++++-------------------
 src/utils/compaction/handler.ts | 39 ++++++++++++++++++------
 4 files changed, 64 insertions(+), 47 deletions(-)

diff --git a/src/constants/storage.ts b/src/constants/storage.ts
index 504fd2eeb..96921cc3c 100644
--- a/src/constants/storage.ts
+++ b/src/constants/storage.ts
@@ -47,6 +47,15 @@ export function getLastThinkingByModelKey(modelName: string): string {
   return `lastThinkingByModel:${modelName}`;
 }
 
+/**
+ * Get storage key for cancelled compaction tracking.
+ * Stores messageId of assistant message being cancelled to verify freshness.
+ */
+export function getCancelledCompactionKey(workspaceId: string): string {
+  return `workspace:${workspaceId}:cancelled-compaction`;
+}
+
+
 /**
  * Get the localStorage key for the UI mode for a workspace
  * Format: "mode:{workspaceId}"
diff --git a/src/hooks/useAIViewKeybinds.ts b/src/hooks/useAIViewKeybinds.ts
index 0fd7384ea..cf2ca0e4b 100644
--- a/src/hooks/useAIViewKeybinds.ts
+++ b/src/hooks/useAIViewKeybinds.ts
@@ -9,7 +9,6 @@ import { getThinkingPolicyForModel } from "@/utils/thinking/policy";
 import { getDefaultModelFromLRU } from "@/hooks/useModelLRU";
 import type { StreamingMessageAggregator } from "@/utils/messages/StreamingMessageAggregator";
 import { isCompactingStream, cancelCompaction } from "@/utils/compaction/handler";
-import { useWorkspaceStoreRaw } from "@/stores/WorkspaceStore";
 
 interface UseAIViewKeybindsParams {
   workspaceId: string;
@@ -32,7 +31,7 @@ interface UseAIViewKeybindsParams {
  * - Ctrl+Shift+T: Toggle thinking level
  * - Ctrl+G: Jump to bottom
  * - Ctrl+T: Open terminal
- * - Ctrl+C (during compaction): Cancel compaction, restore command
+ * - Ctrl+C (during compaction): Cancel compaction, restore command (uses localStorage)
  * - Ctrl+A (during compaction): Accept early with [truncated]
  */
 export function useAIViewKeybinds({
@@ -48,8 +47,6 @@ export function useAIViewKeybinds({
   handleOpenTerminal,
   aggregator,
 }: UseAIViewKeybindsParams): void {
-  const workspaceStore = useWorkspaceStoreRaw();
-
   useEffect(() => {
     const handleKeyDown = (e: KeyboardEvent) => {
       // Ctrl+C during compaction: cancel and restore command to input
@@ -59,8 +56,8 @@ export function useAIViewKeybinds({
         
         if (canInterrupt && isCompactingStream(aggregator)) {
           // Ctrl+C during compaction: restore original state
-          // Sets flag to prevent handleCompactionAbort from performing compaction
-          void cancelCompaction(workspaceId, aggregator, workspaceStore, (command) => {
+          // Stores cancellation marker in localStorage (persists across reloads)
+          void cancelCompaction(workspaceId, aggregator, (command) => {
             chatInputAPI.current?.restoreText(command);
           });
           setAutoRetry(false);
@@ -161,6 +158,5 @@ export function useAIViewKeybinds({
     setThinkingLevel,
     chatInputAPI,
     aggregator,
-    workspaceStore,
   ]);
 }
diff --git a/src/stores/WorkspaceStore.ts b/src/stores/WorkspaceStore.ts
index dee999aba..1bed0fed2 100644
--- a/src/stores/WorkspaceStore.ts
+++ b/src/stores/WorkspaceStore.ts
@@ -28,6 +28,7 @@ import { WorkspaceConsumerManager } from "./WorkspaceConsumerManager";
 import type { ChatUsageDisplay } from "@/utils/tokens/usageAggregator";
 import type { TokenConsumer } from "@/types/chatStats";
 import type { LanguageModelV2Usage } from "@ai-sdk/provider";
+import { getCancelledCompactionKey } from "@/constants/storage";
 
 export interface WorkspaceState {
   messages: DisplayedMessage[];
@@ -133,11 +134,6 @@ export class WorkspaceStore {
   // Track model usage (injected dependency for useModelLRU integration)
   private readonly onModelUsed?: (model: string) => void;
 
-  // Track workspaces where compaction is being cancelled (Ctrl+C) vs accepted early (Ctrl+A)
-  // This flag prevents handleCompactionAbort from performing compaction during cancel flow.
-  // Short-lived: exists only between markCompactionCancelling() and handleCompactionAbort().
-  private cancellingCompaction = new Set<string>();
-
   constructor(onModelUsed?: (model: string) => void) {
     this.onModelUsed = onModelUsed;
 
@@ -163,25 +159,6 @@ export class WorkspaceStore {
     );
   }
 
-  /**
-   * Mark a workspace as cancelling compaction (Ctrl+C flow).
-   * 
-   * This flag prevents handleCompactionAbort from performing compaction when the
-   * stream is interrupted via cancelCompaction. Without this flag, both Ctrl+C
-   * (cancel) and Ctrl+A (accept early) would trigger the same abort handler.
-   * 
-   * Flag lifecycle:
-   * 1. cancelCompaction() sets flag before calling interruptStream
-   * 2. handleCompactionAbort() checks flag and skips compaction if set
-   * 3. handleCompactionAbort() cleans up flag immediately
-   * 
-   * The flag exists for ~10ms during the cancel operation and is cleaned up
-   * by the abort handler itself.
-   */
-  markCompactionCancelling(workspaceId: string): void {
-    this.cancellingCompaction.add(workspaceId);
-  }
-
   /**
    * Check if any workspace's recency changed and bump global recency if so.
    * Uses cached recency values from aggregators for O(1) comparison per workspace.
@@ -473,7 +450,10 @@ export class WorkspaceStore {
    * - **Ctrl+A (accept early)**: Perform compaction with [truncated] sentinel
    * - **Ctrl+C (cancel)**: Skip compaction, let cancelCompaction handle cleanup
    * 
-   * The cancellingCompaction flag distinguishes between these two flows.
+   * Uses localStorage to distinguish flows:
+   * - Checks for cancellation marker in localStorage
+   * - Verifies messageId matches for freshness
+   * - Reload-safe: localStorage persists across page reloads
    */
   private handleCompactionAbort(
     workspaceId: string,
@@ -491,12 +471,23 @@ export class WorkspaceStore {
       return false;
     }
 
-    // Ctrl+C flow: Check if compaction is being cancelled
-    // If flag is set, skip compaction and clean up the flag
-    // cancelCompaction() will handle truncation and input restoration
-    if (this.cancellingCompaction.has(workspaceId)) {
-      this.cancellingCompaction.delete(workspaceId);
-      return false; // Return false to skip compaction
+    // Ctrl+C flow: Check localStorage for cancellation marker
+    // Verify messageId matches to ensure this is a recent/valid cancellation
+    const storageKey = getCancelledCompactionKey(workspaceId);
+    const cancelData = localStorage.getItem(storageKey);
+    if (cancelData) {
+      try {
+        const { messageId } = JSON.parse(cancelData);
+        if (messageId === data.messageId) {
+          // This is a cancelled compaction - clean up marker and skip compaction
+          localStorage.removeItem(storageKey);
+          return false; // Skip compaction, cancelCompaction() handles cleanup
+        }
+      } catch (error) {
+        console.error("[WorkspaceStore] Failed to parse cancellation data:", error);
+      }
+      // If messageId doesn't match or parse failed, clean up stale data
+      localStorage.removeItem(storageKey);
     }
 
     // Ctrl+A flow: Accept early with [truncated] sentinel
diff --git a/src/utils/compaction/handler.ts b/src/utils/compaction/handler.ts
index c34370520..a0607d789 100644
--- a/src/utils/compaction/handler.ts
+++ b/src/utils/compaction/handler.ts
@@ -4,10 +4,15 @@
  * Two interrupt flows during compaction:
  * - Ctrl+C (cancel): Abort compaction, restore original history + command to input
  * - Ctrl+A (accept early): Complete compaction with [truncated] sentinel
+ * 
+ * Uses localStorage to persist cancellation intent across reloads:
+ * - Before interrupt, store messageId in localStorage
+ * - handleCompactionAbort checks localStorage and verifies messageId matches
+ * - Reload-safe: localStorage persists, messageId ensures freshness
  */
 
 import type { StreamingMessageAggregator } from "@/utils/messages/StreamingMessageAggregator";
-import type { WorkspaceStore } from "@/stores/WorkspaceStore";
+import { getCancelledCompactionKey } from "@/constants/storage";
 
 /**
  * Check if the workspace is currently in a compaction stream
@@ -36,21 +41,22 @@ export function getCompactionCommand(aggregator: StreamingMessageAggregator): st
  * Cancel compaction (Ctrl+C flow)
  * 
  * Aborts the compaction stream and restores state to before /compact was invoked:
- * - Interrupts stream without performing compaction (via flag)
+ * - Interrupts stream without performing compaction (via localStorage marker)
  * - Removes compaction request + partial summary from history
  * - Restores original /compact command to input for re-editing
  * 
  * Flow:
- * 1. Set flag in WorkspaceStore to prevent handleCompactionAbort from compacting
+ * 1. Store cancellation marker in localStorage with messageId for verification
  * 2. Interrupt stream (triggers StreamAbortEvent)
- * 3. handleCompactionAbort sees flag, skips compaction, cleans up flag
+ * 3. handleCompactionAbort checks localStorage, verifies messageId, skips compaction
  * 4. Truncate history to remove compaction request + partial summary
  * 5. Restore command to input
+ * 
+ * Reload-safe: localStorage persists across reloads, messageId ensures freshness
  */
 export async function cancelCompaction(
   workspaceId: string,
   aggregator: StreamingMessageAggregator,
-  workspaceStore: WorkspaceStore,
   restoreCommandToInput: (command: string) => void
 ): Promise<boolean> {
   // Extract command before modifying history
@@ -71,12 +77,27 @@ export async function cancelCompaction(
     return false;
   }
 
-  // CRITICAL: Mark workspace as cancelling BEFORE interrupt
-  // This tells handleCompactionAbort to skip compaction (Ctrl+C path vs Ctrl+A path)
-  workspaceStore.markCompactionCancelling(workspaceId);
+  // Get the current streaming assistant message ID from messages
+  // During compaction, there should be a streaming assistant message after the compaction request
+  const streamingMessage = messages.find(
+    (m) => m.role === "assistant" && m.metadata?.partial === true
+  );
+  
+  if (!streamingMessage) {
+    // No streaming message found - shouldn't happen during active compaction
+    return false;
+  }
+
+  // CRITICAL: Store cancellation marker in localStorage BEFORE interrupt
+  // This persists across reloads and includes messageId for verification
+  const storageKey = getCancelledCompactionKey(workspaceId);
+  localStorage.setItem(storageKey, JSON.stringify({
+    messageId: streamingMessage.id,
+    timestamp: Date.now(),
+  }));
 
   // Interrupt stream - triggers StreamAbortEvent → handleCompactionAbort
-  // handleCompactionAbort will see the flag and skip performCompaction
+  // handleCompactionAbort will check localStorage and verify messageId matches
   await window.api.workspace.interruptStream(workspaceId);
 
   // Calculate truncation: keep everything before compaction request

From e2037c85af2eb57476c6fc2803371af1aece368b Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:43:34 -0500
Subject: [PATCH 24/37] Add debug logging for compaction cancel flow

---
 src/stores/WorkspaceStore.ts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/stores/WorkspaceStore.ts b/src/stores/WorkspaceStore.ts
index 1bed0fed2..1cccd660e 100644
--- a/src/stores/WorkspaceStore.ts
+++ b/src/stores/WorkspaceStore.ts
@@ -475,11 +475,19 @@ export class WorkspaceStore {
     // Verify messageId matches to ensure this is a recent/valid cancellation
     const storageKey = getCancelledCompactionKey(workspaceId);
     const cancelData = localStorage.getItem(storageKey);
+    console.log("[WorkspaceStore] handleCompactionAbort - checking localStorage:", {
+      workspaceId,
+      storageKey,
+      cancelData,
+      eventMessageId: data.messageId,
+    });
     if (cancelData) {
       try {
         const { messageId } = JSON.parse(cancelData);
+        console.log("[WorkspaceStore] Parsed cancellation data:", { stored: messageId, event: data.messageId, match: messageId === data.messageId });
         if (messageId === data.messageId) {
           // This is a cancelled compaction - clean up marker and skip compaction
+          console.log("[WorkspaceStore] Cancellation confirmed - skipping compaction");
           localStorage.removeItem(storageKey);
           return false; // Skip compaction, cancelCompaction() handles cleanup
         }
@@ -487,6 +495,7 @@ export class WorkspaceStore {
         console.error("[WorkspaceStore] Failed to parse cancellation data:", error);
       }
       // If messageId doesn't match or parse failed, clean up stale data
+      console.log("[WorkspaceStore] Cleaning up stale/mismatched cancellation marker");
       localStorage.removeItem(storageKey);
     }
 

From d21d577db351fc59f4e8cec970ff6da118dfbd09 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:45:39 -0500
Subject: [PATCH 25/37] Use compaction-request user message ID (stable across
 retries)

The assistant message ID changes with each stream attempt, causing
mismatches. The compaction-request user message ID is stable and
correctly identifies which compaction is being cancelled.
---
 src/stores/WorkspaceStore.ts    | 17 +++++++++++------
 src/utils/compaction/handler.ts | 18 +++++-------------
 2 files changed, 16 insertions(+), 19 deletions(-)

diff --git a/src/stores/WorkspaceStore.ts b/src/stores/WorkspaceStore.ts
index 1cccd660e..046ae5732 100644
--- a/src/stores/WorkspaceStore.ts
+++ b/src/stores/WorkspaceStore.ts
@@ -472,20 +472,25 @@ export class WorkspaceStore {
     }
 
     // Ctrl+C flow: Check localStorage for cancellation marker
-    // Verify messageId matches to ensure this is a recent/valid cancellation
+    // Verify compaction-request user message ID matches (stable across retries)
     const storageKey = getCancelledCompactionKey(workspaceId);
     const cancelData = localStorage.getItem(storageKey);
     console.log("[WorkspaceStore] handleCompactionAbort - checking localStorage:", {
       workspaceId,
       storageKey,
       cancelData,
-      eventMessageId: data.messageId,
+      lastUserMsgId: lastUserMsg?.id,
     });
     if (cancelData) {
       try {
-        const { messageId } = JSON.parse(cancelData);
-        console.log("[WorkspaceStore] Parsed cancellation data:", { stored: messageId, event: data.messageId, match: messageId === data.messageId });
-        if (messageId === data.messageId) {
+        const { compactionRequestId } = JSON.parse(cancelData);
+        const match = compactionRequestId === lastUserMsg?.id;
+        console.log("[WorkspaceStore] Parsed cancellation data:", { 
+          stored: compactionRequestId, 
+          current: lastUserMsg?.id, 
+          match 
+        });
+        if (match) {
           // This is a cancelled compaction - clean up marker and skip compaction
           console.log("[WorkspaceStore] Cancellation confirmed - skipping compaction");
           localStorage.removeItem(storageKey);
@@ -494,7 +499,7 @@ export class WorkspaceStore {
       } catch (error) {
         console.error("[WorkspaceStore] Failed to parse cancellation data:", error);
       }
-      // If messageId doesn't match or parse failed, clean up stale data
+      // If compactionRequestId doesn't match or parse failed, clean up stale data
       console.log("[WorkspaceStore] Cleaning up stale/mismatched cancellation marker");
       localStorage.removeItem(storageKey);
     }
diff --git a/src/utils/compaction/handler.ts b/src/utils/compaction/handler.ts
index a0607d789..b590b9428 100644
--- a/src/utils/compaction/handler.ts
+++ b/src/utils/compaction/handler.ts
@@ -68,7 +68,7 @@ export async function cancelCompaction(
   // Get messages snapshot before interrupting
   const messages = aggregator.getAllMessages();
   
-  // Find where compaction request is located
+  // Find the compaction request message
   const compactionRequestIndex = messages.findIndex(
     (m) => m.role === "user" && m.metadata?.cmuxMetadata?.type === "compaction-request"
   );
@@ -77,22 +77,14 @@ export async function cancelCompaction(
     return false;
   }
 
-  // Get the current streaming assistant message ID from messages
-  // During compaction, there should be a streaming assistant message after the compaction request
-  const streamingMessage = messages.find(
-    (m) => m.role === "assistant" && m.metadata?.partial === true
-  );
-  
-  if (!streamingMessage) {
-    // No streaming message found - shouldn't happen during active compaction
-    return false;
-  }
+  const compactionRequestMsg = messages[compactionRequestIndex];
 
   // CRITICAL: Store cancellation marker in localStorage BEFORE interrupt
-  // This persists across reloads and includes messageId for verification
+  // Use the compaction-request user message ID (stable across retries)
+  // This persists across reloads and verifies we're cancelling the right compaction
   const storageKey = getCancelledCompactionKey(workspaceId);
   localStorage.setItem(storageKey, JSON.stringify({
-    messageId: streamingMessage.id,
+    compactionRequestId: compactionRequestMsg.id,
     timestamp: Date.now(),
   }));
 

From 152b3d8b08289c3994873e791690cc45c83e882a Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:53:11 -0500
Subject: [PATCH 26/37] =?UTF-8?q?=F0=9F=A4=96=20Add=20abandonPartial=20fla?=
 =?UTF-8?q?g=20to=20interruptStream=20for=20clean=20cancellation?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

**Problem**: cancelCompaction was trying to calculate percentage truncation
after committing partial, leading to incorrect truncation removing too much history.

**Solution**: Add abandonPartial flag to interruptStream that deletes the partial
instead of committing it to history.

**Implementation**:
- Add options parameter to interruptStream IPC (abandonPartial?: boolean)
- Backend: if abandonPartial is true, delete partial instead of committing
- AIService: check if partial exists before committing on stream-abort
- cancelCompaction: pass {abandonPartial: true} when interrupting
- Simplified truncation: now just remove compaction-request message

**Benefits**:
- No race conditions with partial commit timing
- Simple percentage calculation (no +1 guesswork)
- Backend explicitly handles the cleanup
- Clear separation: Ctrl+C abandons partial, Ctrl+A commits with [truncated]

All tests pass (574 unit tests).

_Generated with `cmux`_
---
 src/preload.ts                  |  4 ++--
 src/services/aiService.ts       | 13 +++++++++----
 src/services/ipcMain.ts         | 11 +++++++++--
 src/utils/compaction/handler.ts | 16 ++++++++--------
 4 files changed, 28 insertions(+), 16 deletions(-)

diff --git a/src/preload.ts b/src/preload.ts
index 632d7394e..0bfb2d462 100644
--- a/src/preload.ts
+++ b/src/preload.ts
@@ -61,8 +61,8 @@ const api: IPCApi = {
       ipcRenderer.invoke(IPC_CHANNELS.WORKSPACE_SEND_MESSAGE, workspaceId, message, options),
     resumeStream: (workspaceId, options) =>
       ipcRenderer.invoke(IPC_CHANNELS.WORKSPACE_RESUME_STREAM, workspaceId, options),
-    interruptStream: (workspaceId) =>
-      ipcRenderer.invoke(IPC_CHANNELS.WORKSPACE_INTERRUPT_STREAM, workspaceId),
+    interruptStream: (workspaceId, options?) =>
+      ipcRenderer.invoke(IPC_CHANNELS.WORKSPACE_INTERRUPT_STREAM, workspaceId, options),
     truncateHistory: (workspaceId, percentage) =>
       ipcRenderer.invoke(IPC_CHANNELS.WORKSPACE_TRUNCATE_HISTORY, workspaceId, percentage),
     replaceChatHistory: (workspaceId, summaryMessage) =>
diff --git a/src/services/aiService.ts b/src/services/aiService.ts
index 6febb7d5d..029f81a81 100644
--- a/src/services/aiService.ts
+++ b/src/services/aiService.ts
@@ -138,12 +138,17 @@ export class AIService extends EventEmitter {
     this.streamManager.on("stream-end", (data) => this.emit("stream-end", data));
 
     // Handle stream-abort: commit partial to history before forwarding
+    // Note: If abandonPartial option was used, partial is already deleted by IPC handler
     this.streamManager.on("stream-abort", (data: StreamAbortEvent) => {
       void (async () => {
-        // Commit interrupted message to history with partial:true metadata
-        // This ensures /clear and /truncate can clean up interrupted messages
-        await this.partialService.commitToHistory(data.workspaceId);
-        await this.partialService.deletePartial(data.workspaceId);
+        // Check if partial still exists (not abandoned)
+        const partial = await this.partialService.readPartial(data.workspaceId);
+        if (partial) {
+          // Commit interrupted message to history with partial:true metadata
+          // This ensures /clear and /truncate can clean up interrupted messages
+          await this.partialService.commitToHistory(data.workspaceId);
+          await this.partialService.deletePartial(data.workspaceId);
+        }
 
         // Forward abort event to consumers
         this.emit("stream-abort", data);
diff --git a/src/services/ipcMain.ts b/src/services/ipcMain.ts
index 01fd1b4c1..17792da8f 100644
--- a/src/services/ipcMain.ts
+++ b/src/services/ipcMain.ts
@@ -588,8 +588,8 @@ export class IpcMain {
       }
     );
 
-    ipcMain.handle(IPC_CHANNELS.WORKSPACE_INTERRUPT_STREAM, async (_event, workspaceId: string) => {
-      log.debug("interruptStream handler: Received", { workspaceId });
+    ipcMain.handle(IPC_CHANNELS.WORKSPACE_INTERRUPT_STREAM, async (_event, workspaceId: string, options?: { abandonPartial?: boolean }) => {
+      log.debug("interruptStream handler: Received", { workspaceId, options });
       try {
         const session = this.getOrCreateSession(workspaceId);
         const stopResult = await session.interruptStream();
@@ -597,6 +597,13 @@ export class IpcMain {
           log.error("Failed to stop stream:", stopResult.error);
           return { success: false, error: stopResult.error };
         }
+
+        // If abandonPartial is true, delete the partial instead of committing it
+        if (options?.abandonPartial) {
+          log.debug("Abandoning partial for workspace:", workspaceId);
+          await this.partialService.deletePartial(workspaceId);
+        }
+
         return { success: true, data: undefined };
       } catch (error) {
         const errorMessage = error instanceof Error ? error.message : String(error);
diff --git a/src/utils/compaction/handler.ts b/src/utils/compaction/handler.ts
index b590b9428..1973118a9 100644
--- a/src/utils/compaction/handler.ts
+++ b/src/utils/compaction/handler.ts
@@ -88,17 +88,17 @@ export async function cancelCompaction(
     timestamp: Date.now(),
   }));
 
-  // Interrupt stream - triggers StreamAbortEvent → handleCompactionAbort
-  // handleCompactionAbort will check localStorage and verify messageId matches
-  await window.api.workspace.interruptStream(workspaceId);
+  // Interrupt stream with abandonPartial flag
+  // This tells backend to DELETE the partial instead of committing it
+  // Result: history ends with the compaction-request user message
+  await window.api.workspace.interruptStream(workspaceId, { abandonPartial: true });
 
-  // Calculate truncation: keep everything before compaction request
-  // After interrupt: [...history, compactionRequest, partialSummary]
+  // Truncate history to remove compaction-request message
+  // After interrupt with abandonPartial: [...history, compactionRequest]
   // We want: [...history]
-  const totalMessages = messages.length + 1; // +1 for partial summary committed by interrupt
-  const percentageToKeep = compactionRequestIndex / totalMessages;
+  const percentageToKeep = compactionRequestIndex / messages.length;
 
-  // Truncate history to remove compaction artifacts
+  // Truncate to remove compaction request
   await window.api.workspace.truncateHistory(workspaceId, percentageToKeep);
 
   // Restore command to input so user can edit and retry

From dd1353cca90472b474f4c573b447920734a2e57d Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:53:51 -0500
Subject: [PATCH 27/37] Simplify: keep compaction-request in history on cancel

No need to truncate - the compaction-request message is just a normal
user message. Leaving it in history is fine and shows what the user
tried to do. Simplifies the code by removing all truncation logic from
cancelCompaction.
---
 src/utils/compaction/handler.ts | 29 +++++++++++------------------
 1 file changed, 11 insertions(+), 18 deletions(-)

diff --git a/src/utils/compaction/handler.ts b/src/utils/compaction/handler.ts
index 1973118a9..07d89344f 100644
--- a/src/utils/compaction/handler.ts
+++ b/src/utils/compaction/handler.ts
@@ -40,19 +40,19 @@ export function getCompactionCommand(aggregator: StreamingMessageAggregator): st
 /**
  * Cancel compaction (Ctrl+C flow)
  * 
- * Aborts the compaction stream and restores state to before /compact was invoked:
- * - Interrupts stream without performing compaction (via localStorage marker)
- * - Removes compaction request + partial summary from history
+ * Aborts the compaction stream and restores command to input:
+ * - Interrupts stream with abandonPartial flag (deletes partial, doesn't commit)
+ * - Skips compaction (via localStorage marker checked by handleCompactionAbort)
  * - Restores original /compact command to input for re-editing
+ * - Leaves compaction-request message in history (harmless user message)
  * 
  * Flow:
- * 1. Store cancellation marker in localStorage with messageId for verification
- * 2. Interrupt stream (triggers StreamAbortEvent)
- * 3. handleCompactionAbort checks localStorage, verifies messageId, skips compaction
- * 4. Truncate history to remove compaction request + partial summary
- * 5. Restore command to input
+ * 1. Store cancellation marker in localStorage with compactionRequestId for verification
+ * 2. Interrupt stream with {abandonPartial: true} - backend deletes partial
+ * 3. handleCompactionAbort checks localStorage, verifies compactionRequestId, skips compaction
+ * 4. Restore command to input
  * 
- * Reload-safe: localStorage persists across reloads, messageId ensures freshness
+ * Reload-safe: localStorage persists across reloads, compactionRequestId ensures freshness
  */
 export async function cancelCompaction(
   workspaceId: string,
@@ -90,18 +90,11 @@ export async function cancelCompaction(
 
   // Interrupt stream with abandonPartial flag
   // This tells backend to DELETE the partial instead of committing it
-  // Result: history ends with the compaction-request user message
+  // Result: history ends with the compaction-request user message (which is fine - just a user message)
   await window.api.workspace.interruptStream(workspaceId, { abandonPartial: true });
 
-  // Truncate history to remove compaction-request message
-  // After interrupt with abandonPartial: [...history, compactionRequest]
-  // We want: [...history]
-  const percentageToKeep = compactionRequestIndex / messages.length;
-
-  // Truncate to remove compaction request
-  await window.api.workspace.truncateHistory(workspaceId, percentageToKeep);
-
   // Restore command to input so user can edit and retry
+  // Note: We leave the compaction-request message in history - user can delete it manually if desired
   restoreCommandToInput(command);
 
   return true;

From 404362159e3d7df4b4e6f249ece788a595ead8bb Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:54:14 -0500
Subject: [PATCH 28/37] Fix type errors in preload.ts

---
 src/preload.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/preload.ts b/src/preload.ts
index 0bfb2d462..dd4513a91 100644
--- a/src/preload.ts
+++ b/src/preload.ts
@@ -61,7 +61,7 @@ const api: IPCApi = {
       ipcRenderer.invoke(IPC_CHANNELS.WORKSPACE_SEND_MESSAGE, workspaceId, message, options),
     resumeStream: (workspaceId, options) =>
       ipcRenderer.invoke(IPC_CHANNELS.WORKSPACE_RESUME_STREAM, workspaceId, options),
-    interruptStream: (workspaceId, options?) =>
+    interruptStream: (workspaceId: string, options?: { abandonPartial?: boolean }) =>
       ipcRenderer.invoke(IPC_CHANNELS.WORKSPACE_INTERRUPT_STREAM, workspaceId, options),
     truncateHistory: (workspaceId, percentage) =>
       ipcRenderer.invoke(IPC_CHANNELS.WORKSPACE_TRUNCATE_HISTORY, workspaceId, percentage),

From fc7851f8d19ae02bc9ff9c270d790b093052a05c Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:56:42 -0500
Subject: [PATCH 29/37] Fix interruptStream type declaration in ipc.ts

---
 src/types/ipc.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/types/ipc.ts b/src/types/ipc.ts
index 128875a0a..4642b3a2b 100644
--- a/src/types/ipc.ts
+++ b/src/types/ipc.ts
@@ -209,7 +209,7 @@ export interface IPCApi {
       workspaceId: string,
       options: SendMessageOptions
     ): Promise<Result<void, SendMessageError>>;
-    interruptStream(workspaceId: string): Promise<Result<void, string>>;
+    interruptStream(workspaceId: string, options?: { abandonPartial?: boolean }): Promise<Result<void, string>>;
     truncateHistory(workspaceId: string, percentage?: number): Promise<Result<void, string>>;
     replaceChatHistory(
       workspaceId: string,

From 3fbd600ecf561fd7879e634295f9ce40dab9c7db Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:57:28 -0500
Subject: [PATCH 30/37] Enter edit mode on compaction-request after Ctrl+C
 cancel

When user cancels compaction with Ctrl+C, drop them into edit mode
on the compaction-request message with the original /compact command.
This makes it easy to edit the command or delete the message.
---
 src/hooks/useAIViewKeybinds.ts  |  6 +++---
 src/utils/compaction/handler.ts | 15 ++++++++-------
 2 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/src/hooks/useAIViewKeybinds.ts b/src/hooks/useAIViewKeybinds.ts
index cf2ca0e4b..faaa062ab 100644
--- a/src/hooks/useAIViewKeybinds.ts
+++ b/src/hooks/useAIViewKeybinds.ts
@@ -55,10 +55,10 @@ export function useAIViewKeybinds({
         e.preventDefault();
         
         if (canInterrupt && isCompactingStream(aggregator)) {
-          // Ctrl+C during compaction: restore original state
+          // Ctrl+C during compaction: restore original state and enter edit mode
           // Stores cancellation marker in localStorage (persists across reloads)
-          void cancelCompaction(workspaceId, aggregator, (command) => {
-            chatInputAPI.current?.restoreText(command);
+          void cancelCompaction(workspaceId, aggregator, (messageId, command) => {
+            chatInputAPI.current?.startEditing(messageId, command);
           });
           setAutoRetry(false);
           return;
diff --git a/src/utils/compaction/handler.ts b/src/utils/compaction/handler.ts
index 07d89344f..f669b2740 100644
--- a/src/utils/compaction/handler.ts
+++ b/src/utils/compaction/handler.ts
@@ -40,24 +40,25 @@ export function getCompactionCommand(aggregator: StreamingMessageAggregator): st
 /**
  * Cancel compaction (Ctrl+C flow)
  * 
- * Aborts the compaction stream and restores command to input:
+ * Aborts the compaction stream and puts user in edit mode for compaction-request:
  * - Interrupts stream with abandonPartial flag (deletes partial, doesn't commit)
  * - Skips compaction (via localStorage marker checked by handleCompactionAbort)
+ * - Enters edit mode on compaction-request message
  * - Restores original /compact command to input for re-editing
- * - Leaves compaction-request message in history (harmless user message)
+ * - Leaves compaction-request message in history (can edit or delete it)
  * 
  * Flow:
  * 1. Store cancellation marker in localStorage with compactionRequestId for verification
  * 2. Interrupt stream with {abandonPartial: true} - backend deletes partial
  * 3. handleCompactionAbort checks localStorage, verifies compactionRequestId, skips compaction
- * 4. Restore command to input
+ * 4. Enter edit mode on compaction-request message with original command
  * 
  * Reload-safe: localStorage persists across reloads, compactionRequestId ensures freshness
  */
 export async function cancelCompaction(
   workspaceId: string,
   aggregator: StreamingMessageAggregator,
-  restoreCommandToInput: (command: string) => void
+  startEditingMessage: (messageId: string, initialText: string) => void
 ): Promise<boolean> {
   // Extract command before modifying history
   const command = getCompactionCommand(aggregator);
@@ -93,9 +94,9 @@ export async function cancelCompaction(
   // Result: history ends with the compaction-request user message (which is fine - just a user message)
   await window.api.workspace.interruptStream(workspaceId, { abandonPartial: true });
 
-  // Restore command to input so user can edit and retry
-  // Note: We leave the compaction-request message in history - user can delete it manually if desired
-  restoreCommandToInput(command);
+  // Enter edit mode on the compaction-request message with original command
+  // This lets user immediately edit the message or delete it
+  startEditingMessage(compactionRequestMsg.id, command);
 
   return true;
 }

From f799239d7305b5ecaeebe1b0b8f5152bcaeb5e45 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:57:56 -0500
Subject: [PATCH 31/37] Add startEditing method to ChatInputAPI

---
 src/components/ChatInput.tsx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/components/ChatInput.tsx b/src/components/ChatInput.tsx
index f9369c88b..633f7e61d 100644
--- a/src/components/ChatInput.tsx
+++ b/src/components/ChatInput.tsx
@@ -121,6 +121,7 @@ const ModelDisplayWrapper = styled.div`
 export interface ChatInputAPI {
   focus: () => void;
   restoreText: (text: string) => void;
+  startEditing: (messageId: string, initialText: string) => void;
 }
 
 export interface ChatInputProps {

From 3611335a6d2965f9f3b33e57d2f99f78e227a988 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:58:13 -0500
Subject: [PATCH 32/37] Use setEditingMessage directly instead of ChatInputAPI

Editing state lives in AIView, not ChatInput. Pass setEditingMessage
to useAIViewKeybinds and call it directly from cancelCompaction callback.
---
 src/components/ChatInput.tsx   | 9 ++++++++-
 src/hooks/useAIViewKeybinds.ts | 5 ++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/components/ChatInput.tsx b/src/components/ChatInput.tsx
index 633f7e61d..5e314b13f 100644
--- a/src/components/ChatInput.tsx
+++ b/src/components/ChatInput.tsx
@@ -439,14 +439,21 @@ export const ChatInput: React.FC<ChatInputProps> = ({
   }, [focusMessageInput]);
 
   // Provide API to parent via callback
+  const startEditing = useCallback((messageId: string, initialText: string) => {
+    setEditingMessageId(messageId);
+    setInput(initialText);
+    focusMessageInput();
+  }, [focusMessageInput]);
+
   useEffect(() => {
     if (onReady) {
       onReady({ 
         focus: focusMessageInput,
         restoreText,
+        startEditing,
       });
     }
-  }, [onReady, focusMessageInput, restoreText]);
+  }, [onReady, focusMessageInput, restoreText, startEditing]);
 
   useEffect(() => {
     const handleGlobalKeyDown = (event: KeyboardEvent) => {
diff --git a/src/hooks/useAIViewKeybinds.ts b/src/hooks/useAIViewKeybinds.ts
index faaa062ab..e0fcf1c04 100644
--- a/src/hooks/useAIViewKeybinds.ts
+++ b/src/hooks/useAIViewKeybinds.ts
@@ -22,6 +22,7 @@ interface UseAIViewKeybindsParams {
   jumpToBottom: () => void;
   handleOpenTerminal: () => void;
   aggregator: StreamingMessageAggregator; // For compaction detection
+  setEditingMessage: (editing: { id: string; content: string } | undefined) => void;
 }
 
 /**
@@ -46,6 +47,7 @@ export function useAIViewKeybinds({
   jumpToBottom,
   handleOpenTerminal,
   aggregator,
+  setEditingMessage,
 }: UseAIViewKeybindsParams): void {
   useEffect(() => {
     const handleKeyDown = (e: KeyboardEvent) => {
@@ -58,7 +60,7 @@ export function useAIViewKeybinds({
           // Ctrl+C during compaction: restore original state and enter edit mode
           // Stores cancellation marker in localStorage (persists across reloads)
           void cancelCompaction(workspaceId, aggregator, (messageId, command) => {
-            chatInputAPI.current?.startEditing(messageId, command);
+            setEditingMessage({ id: messageId, content: command });
           });
           setAutoRetry(false);
           return;
@@ -158,5 +160,6 @@ export function useAIViewKeybinds({
     setThinkingLevel,
     chatInputAPI,
     aggregator,
+    setEditingMessage,
   ]);
 }

From 6a8afc1954a0f3d50d83bdb69658cdacd488b466 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:58:56 -0500
Subject: [PATCH 33/37] Revert ChatInput API changes - not needed for edit mode
 approach

---
 src/components/ChatInput.tsx | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/src/components/ChatInput.tsx b/src/components/ChatInput.tsx
index 5e314b13f..f9369c88b 100644
--- a/src/components/ChatInput.tsx
+++ b/src/components/ChatInput.tsx
@@ -121,7 +121,6 @@ const ModelDisplayWrapper = styled.div`
 export interface ChatInputAPI {
   focus: () => void;
   restoreText: (text: string) => void;
-  startEditing: (messageId: string, initialText: string) => void;
 }
 
 export interface ChatInputProps {
@@ -439,21 +438,14 @@ export const ChatInput: React.FC<ChatInputProps> = ({
   }, [focusMessageInput]);
 
   // Provide API to parent via callback
-  const startEditing = useCallback((messageId: string, initialText: string) => {
-    setEditingMessageId(messageId);
-    setInput(initialText);
-    focusMessageInput();
-  }, [focusMessageInput]);
-
   useEffect(() => {
     if (onReady) {
       onReady({ 
         focus: focusMessageInput,
         restoreText,
-        startEditing,
       });
     }
-  }, [onReady, focusMessageInput, restoreText, startEditing]);
+  }, [onReady, focusMessageInput, restoreText]);
 
   useEffect(() => {
     const handleGlobalKeyDown = (event: KeyboardEvent) => {

From 6e117d6bd3d6d2b9538a719969a17e11175dacdf Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:59:01 -0500
Subject: [PATCH 34/37] Pass setEditingMessage to useAIViewKeybinds

---
 src/components/AIView.tsx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/components/AIView.tsx b/src/components/AIView.tsx
index 79f3d2a34..18fecf8d6 100644
--- a/src/components/AIView.tsx
+++ b/src/components/AIView.tsx
@@ -346,6 +346,7 @@ const AIViewInner: React.FC<AIViewProps> = ({
     jumpToBottom,
     handleOpenTerminal,
     aggregator,
+    setEditingMessage,
   });
 
   // Clear editing state if the message being edited no longer exists

From fc4d0f3f11159be2948de9a04422347f94bfe20e Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 20:59:16 -0500
Subject: [PATCH 35/37] Remove debug logging from WorkspaceStore

---
 src/stores/WorkspaceStore.ts | 16 +---------------
 1 file changed, 1 insertion(+), 15 deletions(-)

diff --git a/src/stores/WorkspaceStore.ts b/src/stores/WorkspaceStore.ts
index 046ae5732..92b42882f 100644
--- a/src/stores/WorkspaceStore.ts
+++ b/src/stores/WorkspaceStore.ts
@@ -475,24 +475,11 @@ export class WorkspaceStore {
     // Verify compaction-request user message ID matches (stable across retries)
     const storageKey = getCancelledCompactionKey(workspaceId);
     const cancelData = localStorage.getItem(storageKey);
-    console.log("[WorkspaceStore] handleCompactionAbort - checking localStorage:", {
-      workspaceId,
-      storageKey,
-      cancelData,
-      lastUserMsgId: lastUserMsg?.id,
-    });
     if (cancelData) {
       try {
         const { compactionRequestId } = JSON.parse(cancelData);
-        const match = compactionRequestId === lastUserMsg?.id;
-        console.log("[WorkspaceStore] Parsed cancellation data:", { 
-          stored: compactionRequestId, 
-          current: lastUserMsg?.id, 
-          match 
-        });
-        if (match) {
+        if (compactionRequestId === lastUserMsg?.id) {
           // This is a cancelled compaction - clean up marker and skip compaction
-          console.log("[WorkspaceStore] Cancellation confirmed - skipping compaction");
           localStorage.removeItem(storageKey);
           return false; // Skip compaction, cancelCompaction() handles cleanup
         }
@@ -500,7 +487,6 @@ export class WorkspaceStore {
         console.error("[WorkspaceStore] Failed to parse cancellation data:", error);
       }
       // If compactionRequestId doesn't match or parse failed, clean up stale data
-      console.log("[WorkspaceStore] Cleaning up stale/mismatched cancellation marker");
       localStorage.removeItem(storageKey);
     }
 

From bebbc41a9ef7588423e163389549cf9d018bf091 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 21:10:06 -0500
Subject: [PATCH 36/37] =?UTF-8?q?=F0=9F=A4=96=20Refactor:=20Extract=20comp?=
 =?UTF-8?q?action=20helper=20functions=20to=20reduce=20duplication?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- Added findCompactionRequestMessage() helper to eliminate duplicated message finding logic
- Refactored WorkspaceStore to use isCompactingStream() and findCompactionRequestMessage()
- Simplified cancelCompaction() to use the new helper
- Fixed outdated comment in storage.ts about messageId tracking

Net result: -13 lines of duplicated code across WorkspaceStore methods
---
 src/constants/storage.ts        |  2 +-
 src/stores/WorkspaceStore.ts    | 26 +++++++++----------
 src/utils/compaction/handler.ts | 46 +++++++++++++++++++--------------
 3 files changed, 39 insertions(+), 35 deletions(-)

diff --git a/src/constants/storage.ts b/src/constants/storage.ts
index 96921cc3c..5a01b1e95 100644
--- a/src/constants/storage.ts
+++ b/src/constants/storage.ts
@@ -49,7 +49,7 @@ export function getLastThinkingByModelKey(modelName: string): string {
 
 /**
  * Get storage key for cancelled compaction tracking.
- * Stores messageId of assistant message being cancelled to verify freshness.
+ * Stores compaction-request user message ID to verify freshness across reloads.
  */
 export function getCancelledCompactionKey(workspaceId: string): string {
   return `workspace:${workspaceId}:cancelled-compaction`;
diff --git a/src/stores/WorkspaceStore.ts b/src/stores/WorkspaceStore.ts
index 92b42882f..00e898df4 100644
--- a/src/stores/WorkspaceStore.ts
+++ b/src/stores/WorkspaceStore.ts
@@ -29,6 +29,7 @@ import type { ChatUsageDisplay } from "@/utils/tokens/usageAggregator";
 import type { TokenConsumer } from "@/types/chatStats";
 import type { LanguageModelV2Usage } from "@ai-sdk/provider";
 import { getCancelledCompactionKey } from "@/constants/storage";
+import { isCompactingStream, findCompactionRequestMessage } from "@/utils/compaction/handler";
 
 export interface WorkspaceState {
   messages: DisplayedMessage[];
@@ -424,11 +425,8 @@ export class WorkspaceStore {
     // Type guard: only StreamEndEvent has messageId
     if (!("messageId" in data)) return false;
 
-    // Check if this was a compaction stream by looking at the last user message
-    const messages = aggregator.getAllMessages();
-    const lastUserMsg = [...messages].reverse().find((m) => m.role === "user");
-
-    if (lastUserMsg?.metadata?.cmuxMetadata?.type !== "compaction-request") {
+    // Check if this was a compaction stream
+    if (!isCompactingStream(aggregator)) {
       return false;
     }
 
@@ -463,11 +461,14 @@ export class WorkspaceStore {
     // Type guard: only StreamAbortEvent has messageId
     if (!("messageId" in data)) return false;
 
-    // Check if this was a compaction stream by looking at the last user message
-    const messages = aggregator.getAllMessages();
-    const lastUserMsg = [...messages].reverse().find((m) => m.role === "user");
+    // Check if this was a compaction stream
+    if (!isCompactingStream(aggregator)) {
+      return false;
+    }
 
-    if (lastUserMsg?.metadata?.cmuxMetadata?.type !== "compaction-request") {
+    // Get the compaction request message for ID verification
+    const compactionRequestMsg = findCompactionRequestMessage(aggregator);
+    if (!compactionRequestMsg) {
       return false;
     }
 
@@ -478,7 +479,7 @@ export class WorkspaceStore {
     if (cancelData) {
       try {
         const { compactionRequestId } = JSON.parse(cancelData);
-        if (compactionRequestId === lastUserMsg?.id) {
+        if (compactionRequestId === compactionRequestMsg.id) {
           // This is a cancelled compaction - clean up marker and skip compaction
           localStorage.removeItem(storageKey);
           return false; // Skip compaction, cancelCompaction() handles cleanup
@@ -518,10 +519,7 @@ export class WorkspaceStore {
     const metadata = "metadata" in data ? data.metadata : undefined;
 
     // Extract continueMessage from compaction-request before history gets replaced
-    const messages = aggregator.getAllMessages();
-    const compactRequestMsg = [...messages]
-      .reverse()
-      .find((m) => m.role === "user" && m.metadata?.cmuxMetadata?.type === "compaction-request");
+    const compactRequestMsg = findCompactionRequestMessage(aggregator);
     const cmuxMeta = compactRequestMsg?.metadata?.cmuxMetadata;
     const continueMessage =
       cmuxMeta?.type === "compaction-request" ? cmuxMeta.parsed.continueMessage : undefined;
diff --git a/src/utils/compaction/handler.ts b/src/utils/compaction/handler.ts
index f669b2740..300daa4df 100644
--- a/src/utils/compaction/handler.ts
+++ b/src/utils/compaction/handler.ts
@@ -23,18 +23,32 @@ export function isCompactingStream(aggregator: StreamingMessageAggregator): bool
   return lastUserMsg?.metadata?.cmuxMetadata?.type === "compaction-request";
 }
 
+/**
+ * Find the compaction-request user message in message history
+ */
+export function findCompactionRequestMessage(
+  aggregator: StreamingMessageAggregator
+): ReturnType<typeof aggregator.getAllMessages>[number] | null {
+  const messages = aggregator.getAllMessages();
+  return (
+    [...messages]
+      .reverse()
+      .find((m) => m.role === "user" && m.metadata?.cmuxMetadata?.type === "compaction-request") ??
+    null
+  );
+}
+
 /**
  * Get the original /compact command from the last user message
  */
 export function getCompactionCommand(aggregator: StreamingMessageAggregator): string | null {
-  const messages = aggregator.getAllMessages();
-  const lastUserMsg = [...messages].reverse().find((m) => m.role === "user");
+  const compactionMsg = findCompactionRequestMessage(aggregator);
+  if (!compactionMsg) return null;
 
-  if (lastUserMsg?.metadata?.cmuxMetadata?.type !== "compaction-request") {
-    return null;
-  }
+  const cmuxMeta = compactionMsg.metadata?.cmuxMetadata;
+  if (cmuxMeta?.type !== "compaction-request") return null;
 
-  return lastUserMsg.metadata.cmuxMetadata.rawCommand ?? null;
+  return cmuxMeta.rawCommand ?? null;
 }
 
 /**
@@ -60,26 +74,18 @@ export async function cancelCompaction(
   aggregator: StreamingMessageAggregator,
   startEditingMessage: (messageId: string, initialText: string) => void
 ): Promise<boolean> {
-  // Extract command before modifying history
-  const command = getCompactionCommand(aggregator);
-  if (!command) {
+  // Find the compaction request message
+  const compactionRequestMsg = findCompactionRequestMessage(aggregator);
+  if (!compactionRequestMsg) {
     return false;
   }
 
-  // Get messages snapshot before interrupting
-  const messages = aggregator.getAllMessages();
-  
-  // Find the compaction request message
-  const compactionRequestIndex = messages.findIndex(
-    (m) => m.role === "user" && m.metadata?.cmuxMetadata?.type === "compaction-request"
-  );
-  
-  if (compactionRequestIndex === -1) {
+  // Extract command before modifying history
+  const command = getCompactionCommand(aggregator);
+  if (!command) {
     return false;
   }
 
-  const compactionRequestMsg = messages[compactionRequestIndex];
-
   // CRITICAL: Store cancellation marker in localStorage BEFORE interrupt
   // Use the compaction-request user message ID (stable across retries)
   // This persists across reloads and verifies we're cancelling the right compaction

From 93755a6f9fa51181ba9b3199d394bdf902023ff8 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Fri, 17 Oct 2025 21:17:36 -0500
Subject: [PATCH 37/37] =?UTF-8?q?=F0=9F=A4=96=20Fix=20ESLint=20error:=20ty?=
 =?UTF-8?q?pe=20JSON.parse=20result=20in=20cancellation=20check?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/components/ChatInput.tsx    | 13 ++++++----
 src/constants/storage.ts        |  1 -
 src/hooks/useAIViewKeybinds.ts  |  6 ++---
 src/services/ipcMain.ts         | 43 ++++++++++++++++++---------------
 src/stores/WorkspaceStore.ts    |  8 +++---
 src/types/ipc.ts                |  5 +++-
 src/utils/compaction/handler.ts | 20 ++++++++-------
 7 files changed, 53 insertions(+), 43 deletions(-)

diff --git a/src/components/ChatInput.tsx b/src/components/ChatInput.tsx
index f9369c88b..22e57141d 100644
--- a/src/components/ChatInput.tsx
+++ b/src/components/ChatInput.tsx
@@ -432,15 +432,18 @@ export const ChatInput: React.FC<ChatInputProps> = ({
   }, []);
 
   // Method to restore text to input (used by compaction cancel)
-  const restoreText = useCallback((text: string) => {
-    setInput(text);
-    focusMessageInput();
-  }, [focusMessageInput]);
+  const restoreText = useCallback(
+    (text: string) => {
+      setInput(text);
+      focusMessageInput();
+    },
+    [focusMessageInput]
+  );
 
   // Provide API to parent via callback
   useEffect(() => {
     if (onReady) {
-      onReady({ 
+      onReady({
         focus: focusMessageInput,
         restoreText,
       });
diff --git a/src/constants/storage.ts b/src/constants/storage.ts
index 5a01b1e95..537fede58 100644
--- a/src/constants/storage.ts
+++ b/src/constants/storage.ts
@@ -55,7 +55,6 @@ export function getCancelledCompactionKey(workspaceId: string): string {
   return `workspace:${workspaceId}:cancelled-compaction`;
 }
 
-
 /**
  * Get the localStorage key for the UI mode for a workspace
  * Format: "mode:{workspaceId}"
diff --git a/src/hooks/useAIViewKeybinds.ts b/src/hooks/useAIViewKeybinds.ts
index e0fcf1c04..8dced943a 100644
--- a/src/hooks/useAIViewKeybinds.ts
+++ b/src/hooks/useAIViewKeybinds.ts
@@ -55,7 +55,7 @@ export function useAIViewKeybinds({
       // (different from Ctrl+A which accepts early with [truncated])
       if (matchesKeybind(e, KEYBINDS.INTERRUPT_STREAM)) {
         e.preventDefault();
-        
+
         if (canInterrupt && isCompactingStream(aggregator)) {
           // Ctrl+C during compaction: restore original state and enter edit mode
           // Stores cancellation marker in localStorage (persists across reloads)
@@ -65,7 +65,7 @@ export function useAIViewKeybinds({
           setAutoRetry(false);
           return;
         }
-        
+
         // Normal stream interrupt (non-compaction)
         if (canInterrupt || showRetryBarrier) {
           setAutoRetry(false); // User explicitly stopped - don't auto-retry
@@ -78,7 +78,7 @@ export function useAIViewKeybinds({
       // (different from Ctrl+C which cancels and restores original state)
       if (matchesKeybind(e, KEYBINDS.ACCEPT_EARLY_COMPACTION)) {
         e.preventDefault();
-        
+
         if (canInterrupt && isCompactingStream(aggregator)) {
           // Ctrl+A during compaction: perform compaction with partial summary
           // No flag set - handleCompactionAbort will perform compaction with [truncated]
diff --git a/src/services/ipcMain.ts b/src/services/ipcMain.ts
index 17792da8f..293fe42ef 100644
--- a/src/services/ipcMain.ts
+++ b/src/services/ipcMain.ts
@@ -588,29 +588,32 @@ export class IpcMain {
       }
     );
 
-    ipcMain.handle(IPC_CHANNELS.WORKSPACE_INTERRUPT_STREAM, async (_event, workspaceId: string, options?: { abandonPartial?: boolean }) => {
-      log.debug("interruptStream handler: Received", { workspaceId, options });
-      try {
-        const session = this.getOrCreateSession(workspaceId);
-        const stopResult = await session.interruptStream();
-        if (!stopResult.success) {
-          log.error("Failed to stop stream:", stopResult.error);
-          return { success: false, error: stopResult.error };
-        }
+    ipcMain.handle(
+      IPC_CHANNELS.WORKSPACE_INTERRUPT_STREAM,
+      async (_event, workspaceId: string, options?: { abandonPartial?: boolean }) => {
+        log.debug("interruptStream handler: Received", { workspaceId, options });
+        try {
+          const session = this.getOrCreateSession(workspaceId);
+          const stopResult = await session.interruptStream();
+          if (!stopResult.success) {
+            log.error("Failed to stop stream:", stopResult.error);
+            return { success: false, error: stopResult.error };
+          }
 
-        // If abandonPartial is true, delete the partial instead of committing it
-        if (options?.abandonPartial) {
-          log.debug("Abandoning partial for workspace:", workspaceId);
-          await this.partialService.deletePartial(workspaceId);
-        }
+          // If abandonPartial is true, delete the partial instead of committing it
+          if (options?.abandonPartial) {
+            log.debug("Abandoning partial for workspace:", workspaceId);
+            await this.partialService.deletePartial(workspaceId);
+          }
 
-        return { success: true, data: undefined };
-      } catch (error) {
-        const errorMessage = error instanceof Error ? error.message : String(error);
-        log.error("Unexpected error in interruptStream handler:", error);
-        return { success: false, error: `Failed to interrupt stream: ${errorMessage}` };
+          return { success: true, data: undefined };
+        } catch (error) {
+          const errorMessage = error instanceof Error ? error.message : String(error);
+          log.error("Unexpected error in interruptStream handler:", error);
+          return { success: false, error: `Failed to interrupt stream: ${errorMessage}` };
+        }
       }
-    });
+    );
 
     ipcMain.handle(
       IPC_CHANNELS.WORKSPACE_TRUNCATE_HISTORY,
diff --git a/src/stores/WorkspaceStore.ts b/src/stores/WorkspaceStore.ts
index 00e898df4..be1f0218f 100644
--- a/src/stores/WorkspaceStore.ts
+++ b/src/stores/WorkspaceStore.ts
@@ -443,11 +443,11 @@ export class WorkspaceStore {
 
   /**
    * Handle interruption of a compaction stream (StreamAbortEvent).
-   * 
+   *
    * Two distinct flows trigger this:
    * - **Ctrl+A (accept early)**: Perform compaction with [truncated] sentinel
    * - **Ctrl+C (cancel)**: Skip compaction, let cancelCompaction handle cleanup
-   * 
+   *
    * Uses localStorage to distinguish flows:
    * - Checks for cancellation marker in localStorage
    * - Verifies messageId matches for freshness
@@ -478,8 +478,8 @@ export class WorkspaceStore {
     const cancelData = localStorage.getItem(storageKey);
     if (cancelData) {
       try {
-        const { compactionRequestId } = JSON.parse(cancelData);
-        if (compactionRequestId === compactionRequestMsg.id) {
+        const parsed = JSON.parse(cancelData) as { compactionRequestId: string; timestamp: number };
+        if (parsed.compactionRequestId === compactionRequestMsg.id) {
           // This is a cancelled compaction - clean up marker and skip compaction
           localStorage.removeItem(storageKey);
           return false; // Skip compaction, cancelCompaction() handles cleanup
diff --git a/src/types/ipc.ts b/src/types/ipc.ts
index 4642b3a2b..38828f266 100644
--- a/src/types/ipc.ts
+++ b/src/types/ipc.ts
@@ -209,7 +209,10 @@ export interface IPCApi {
       workspaceId: string,
       options: SendMessageOptions
     ): Promise<Result<void, SendMessageError>>;
-    interruptStream(workspaceId: string, options?: { abandonPartial?: boolean }): Promise<Result<void, string>>;
+    interruptStream(
+      workspaceId: string,
+      options?: { abandonPartial?: boolean }
+    ): Promise<Result<void, string>>;
     truncateHistory(workspaceId: string, percentage?: number): Promise<Result<void, string>>;
     replaceChatHistory(
       workspaceId: string,
diff --git a/src/utils/compaction/handler.ts b/src/utils/compaction/handler.ts
index 300daa4df..45f2fbfb8 100644
--- a/src/utils/compaction/handler.ts
+++ b/src/utils/compaction/handler.ts
@@ -4,7 +4,7 @@
  * Two interrupt flows during compaction:
  * - Ctrl+C (cancel): Abort compaction, restore original history + command to input
  * - Ctrl+A (accept early): Complete compaction with [truncated] sentinel
- * 
+ *
  * Uses localStorage to persist cancellation intent across reloads:
  * - Before interrupt, store messageId in localStorage
  * - handleCompactionAbort checks localStorage and verifies messageId matches
@@ -53,20 +53,20 @@ export function getCompactionCommand(aggregator: StreamingMessageAggregator): st
 
 /**
  * Cancel compaction (Ctrl+C flow)
- * 
+ *
  * Aborts the compaction stream and puts user in edit mode for compaction-request:
  * - Interrupts stream with abandonPartial flag (deletes partial, doesn't commit)
  * - Skips compaction (via localStorage marker checked by handleCompactionAbort)
  * - Enters edit mode on compaction-request message
  * - Restores original /compact command to input for re-editing
  * - Leaves compaction-request message in history (can edit or delete it)
- * 
+ *
  * Flow:
  * 1. Store cancellation marker in localStorage with compactionRequestId for verification
  * 2. Interrupt stream with {abandonPartial: true} - backend deletes partial
  * 3. handleCompactionAbort checks localStorage, verifies compactionRequestId, skips compaction
  * 4. Enter edit mode on compaction-request message with original command
- * 
+ *
  * Reload-safe: localStorage persists across reloads, compactionRequestId ensures freshness
  */
 export async function cancelCompaction(
@@ -90,10 +90,13 @@ export async function cancelCompaction(
   // Use the compaction-request user message ID (stable across retries)
   // This persists across reloads and verifies we're cancelling the right compaction
   const storageKey = getCancelledCompactionKey(workspaceId);
-  localStorage.setItem(storageKey, JSON.stringify({
-    compactionRequestId: compactionRequestMsg.id,
-    timestamp: Date.now(),
-  }));
+  localStorage.setItem(
+    storageKey,
+    JSON.stringify({
+      compactionRequestId: compactionRequestMsg.id,
+      timestamp: Date.now(),
+    })
+  );
 
   // Interrupt stream with abandonPartial flag
   // This tells backend to DELETE the partial instead of committing it
@@ -106,4 +109,3 @@ export async function cancelCompaction(
 
   return true;
 }
-