feat: add parent/child directory lookup for ccw cli output

- Implement findProjectWithExecution() to search upward through parent directories
- Add automatic project path discovery in outputAction
- Support explicit --project parameter for manual path specification
- Improve error messages with search scope indication
- Display project path in formatted output
- Enable cross-directory execution without working directory dependency

ccw/src/commands/cli.ts

@@ -28,7 +28,7 @@ import {
   projectExists,
   getStorageLocationInstructions
 } from '../tools/storage-manager.js';
-import { getHistoryStore } from '../tools/cli-history-store.js';
+import { getHistoryStore, findProjectWithExecution } from '../tools/cli-history-store.js';
 import { createSpinner } from '../utils/ui.js';
 import { loadClaudeCliSettings } from '../tools/claude-cli-tools.js';
 
@@ -163,6 +163,7 @@ interface OutputViewOptions {
   turn?: string;
   raw?: boolean;
   final?: boolean; // Only output final result with usage hint
+  project?: string; // Optional project path for lookup
 }
 
 /**
@@ -355,16 +356,21 @@ function showStorageHelp(): void {
 
 /**
  * Show cached output for a conversation with pagination
+ * Supports automatic discovery of project path from current directory or parents
  */
 async function outputAction(conversationId: string | undefined, options: OutputViewOptions): Promise<void> {
   if (!conversationId) {
     console.error(chalk.red('Error: Conversation ID is required'));
-    console.error(chalk.gray('Usage: ccw cli output <conversation-id> [--offset N] [--limit N]'));
+    console.error(chalk.gray('Usage: ccw cli output <conversation-id> [--offset N] [--limit N] [--project <path>]'));
     process.exit(1);
   }
 
-  const store = getHistoryStore(process.cwd());
-  const result = store.getCachedOutput(
+  // Determine project path to use
+  let projectPath = options.project || process.cwd();
+  let store = getHistoryStore(projectPath);
+
+  // Try to get result from specified/current directory
+  let result = store.getCachedOutput(
     conversationId,
     options.turn ? parseInt(options.turn) : undefined,
     {
@@ -374,8 +380,31 @@ async function outputAction(conversationId: string | undefined, options: OutputV
     }
   );
 
+  // If not found and no explicit project specified, try to find it
+  if (!result && !options.project) {
+    const found = findProjectWithExecution(conversationId, process.cwd());
+    if (found) {
+      projectPath = found.projectPath;
+      store = getHistoryStore(projectPath);
+      result = store.getCachedOutput(
+        conversationId,
+        options.turn ? parseInt(options.turn) : undefined,
+        {
+          offset: parseInt(options.offset || '0'),
+          limit: parseInt(options.limit || '10000'),
+          outputType: options.outputType || 'both'
+        }
+      );
+    }
+  }
+
   if (!result) {
+    const hint = options.project
+      ? `in project: ${options.project}`
+      : 'in current directory or parent directories';
     console.error(chalk.red(`Error: Execution not found: ${conversationId}`));
+    console.error(chalk.gray(`  Searched ${hint}`));
+    console.error(chalk.gray('Usage: ccw cli output <conversation-id> [--project <path>]'));
     process.exit(1);
   }
 
@@ -395,9 +424,10 @@ async function outputAction(conversationId: string | undefined, options: OutputV
     console.log();
     console.log(chalk.gray('─'.repeat(60)));
     console.log(chalk.dim(`Usage: ccw cli output ${conversationId} [options]`));
-    console.log(chalk.dim('  --raw           Raw output (no hint)'));
+    console.log(chalk.dim('  --raw           Raw output (no formatting)'));
     console.log(chalk.dim('  --offset <n>    Start from byte offset'));
     console.log(chalk.dim('  --limit <n>     Limit output bytes'));
+    console.log(chalk.dim('  --project <p>   Specify project path explicitly'));
     console.log(chalk.dim(`  --resume        ccw cli -p "..." --resume ${conversationId}`));
     return;
   }
@@ -409,6 +439,7 @@ async function outputAction(conversationId: string | undefined, options: OutputV
   console.log(`  ${chalk.gray('Cached:')}    ${result.cached ? chalk.green('Yes') : chalk.yellow('No')}`);
   console.log(`  ${chalk.gray('Status:')}    ${result.status}`);
   console.log(`  ${chalk.gray('Time:')}      ${result.timestamp}`);
+  console.log(`  ${chalk.gray('Project:')}   ${chalk.cyan(projectPath)}`);
   console.log();
 
   if (result.stdout) {

ccw/src/tools/cli-history-store.ts

@@ -5,9 +5,9 @@
 
 import Database from 'better-sqlite3';
 import { existsSync, mkdirSync, readdirSync, readFileSync, statSync, unlinkSync, rmdirSync } from 'fs';
-import { join } from 'path';
+import { join, dirname, resolve } from 'path';
 import { parseSessionFile, formatConversation, extractConversationPairs, type ParsedSession, type ParsedTurn } from './session-content-parser.js';
-import { StoragePaths, ensureStorageDir, getProjectId } from '../config/storage-paths.js';
+import { StoragePaths, ensureStorageDir, getProjectId, getCCWHome } from '../config/storage-paths.js';
 import type { CliOutputUnit } from './cli-output-converter.js';
 
 // Types
@@ -1404,5 +1404,95 @@ export function closeAllStores(): void {
   storeCache.clear();
 }
 
+/**
+ * Find project path that contains the given execution
+ * Searches upward through parent directories and all registered projects
+ * @param conversationId - Execution ID to search for
+ * @param startDir - Starting directory (default: process.cwd())
+ * @returns Object with projectPath and projectId if found, null otherwise
+ */
+export function findProjectWithExecution(
+  conversationId: string,
+  startDir: string = process.cwd()
+): { projectPath: string; projectId: string } | null {
+  // Strategy 1: Search upward in parent directories
+  let currentPath = resolve(startDir);
+  const visited = new Set<string>();
+
+  while (true) {
+    // Avoid infinite loops
+    if (visited.has(currentPath)) break;
+    visited.add(currentPath);
+
+    const projectId = getProjectId(currentPath);
+    const paths = StoragePaths.project(currentPath);
+
+    // Check if database exists for this path
+    if (existsSync(paths.historyDb)) {
+      try {
+        const store = getHistoryStore(currentPath);
+        const result = store.getCachedOutput(conversationId);
+        if (result) {
+          return { projectPath: currentPath, projectId };
+        }
+      } catch {
+        // Database might be locked or corrupted, continue searching
+      }
+    }
+
+    // Move to parent directory
+    const parentPath = dirname(currentPath);
+    if (parentPath === currentPath) {
+      // Reached filesystem root
+      break;
+    }
+    currentPath = parentPath;
+  }
+
+  // Strategy 2: Search in all registered projects (global search)
+  // This covers cases where execution might be in a completely different project tree
+  const projectsDir = join(getCCWHome(), 'projects');
+  if (existsSync(projectsDir)) {
+    try {
+      const entries = readdirSync(projectsDir, { withFileTypes: true });
+
+      for (const entry of entries) {
+        if (!entry.isDirectory()) continue;
+
+        const projectId = entry.name;
+        const historyDb = join(projectsDir, projectId, 'cli-history', 'history.db');
+
+        if (!existsSync(historyDb)) continue;
+
+        try {
+          // Open and query this database directly
+          const db = new Database(historyDb, { readonly: true });
+          const turn = db.prepare(`
+            SELECT * FROM turns
+            WHERE conversation_id = ?
+            ORDER BY turn_number DESC
+            LIMIT 1
+          `).get(conversationId);
+
+          db.close();
+
+          if (turn) {
+            // Found in this project - return the projectId
+            // Note: projectPath is set to projectId since we don't have the original path stored
+            return { projectPath: projectId, projectId };
+          }
+        } catch {
+          // Skip this database (might be corrupted or locked)
+          continue;
+        }
+      }
+    } catch {
+      // Failed to read projects directory
+    }
+  }
+
+  return null;
+}
+
 // Re-export types from session-content-parser
 export type { ParsedSession, ParsedTurn } from './session-content-parser.js';