fix(compaction): respect previous message agent on context injection (#10)

* docs: fix oh-my-opencode hook name

The correct hook name is 'anthropic-context-window-limit-recovery', not 'anthropic-auto-compact'.

🤖 Generated with assistance of [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

* fix(cli): update hook name to anthropic-context-window-limit-recovery

Also update CLI flag from --disable-auto-compact to --disable-context-recovery
to match the new hook naming convention.

🤖 Generated with assistance of [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

* fix(compaction): respect previous message agent on context injection

Remove hardcoded 'agent: "general"' from injectCompactionContext.
The injectHookMessage function already has fallback logic that uses
findNearestMessageWithFields to get the actual agent from previous messages.

By not passing an explicit agent, we allow the existing fallback to work:
  resolvedAgent = originalMessage.agent ?? fallback?.agent ?? "general"

This ensures the compaction context message is correctly attributed to the
agent that was active when compaction was triggered, maintaining proper
agent context across session compaction.

🤖 Generated with assistance of [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

Author: code-yeongyu

bun.lock

@@ -48,6 +48,7 @@ interface SummarizeContext {
   modelID: string;
   usageRatio: number;
   directory: string;
+  agent?: string;
 }
 
 export interface CompactionOptions {
@@ -282,7 +283,7 @@ export function createCompactionHook(
     const prompt = createCompactionPrompt(projectMemories);
 
     const success = injectHookMessage(summarizeCtx.sessionID, prompt, {
-      agent: "general",
+      agent: summarizeCtx.agent,
       model: { providerID: summarizeCtx.providerID, modelID: summarizeCtx.modelID },
       path: { cwd: summarizeCtx.directory },
     });
@@ -329,8 +330,19 @@ export function createCompactionHook(
     const tokens = lastAssistant.tokens;
     if (!tokens) return;
 
-    const modelID = lastAssistant.modelID ?? "";
-    const providerID = lastAssistant.providerID ?? "";
+    let modelID = lastAssistant.modelID ?? "";
+    let providerID = lastAssistant.providerID ?? "";
+    let agent: string | undefined;
+
+    // Fallback: find model/agent from stored messages if not available
+    const messageDir = getMessageDir(sessionID);
+    const storedMessage = messageDir ? findNearestMessageWithFields(messageDir) : null;
+    
+    if (!providerID || !modelID) {
+      if (storedMessage?.model?.providerID) providerID = storedMessage.model.providerID;
+      if (storedMessage?.model?.modelID) modelID = storedMessage.model.modelID;
+    }
+    agent = storedMessage?.agent;
 
     if (!isSupportedModel(modelID)) {
       log("[compaction] skipping unsupported model", { modelID });
@@ -381,6 +393,7 @@ export function createCompactionHook(
         modelID,
         usageRatio,
         directory: ctx.directory,
+        agent,
       });
 
       state.summarizedSessions.add(sessionID);