From 8e0b1ee4e1482f9d7ed56108dbcd90244a01a28b Mon Sep 17 00:00:00 2001
From: Alex Newman <thedotmack@gmail.com>
Date: Fri, 5 Dec 2025 19:10:51 -0500
Subject: [PATCH] refactor: Convert all hooks to HTTP clients (remove all SQL)
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Architecture transformation: Hooks → HTTP → Worker → Database

**context-hook.ts** (843 → 104 lines, 88% reduction)
- Remove all database imports and raw SQL queries
- HTTP GET to /api/context/inject
- Returns both formatted (stderr) and unformatted (stdout) context
- Dual output: colored display for users, plain text for model

**user-message-hook.ts** (updated, 113 lines)
- HTTP GET to /api/context/inject with colors=true
- Displays formatted context to users via stderr
- No database dependencies

**save-hook.ts** (418 → 99 lines, 76% reduction)
- Remove all SessionStore database methods
- HTTP POST to /api/sessions/observations
- Worker handles privacy checks and observation creation
- Fire-and-forget pattern with 2s timeout

**summary-hook.ts** (435 → 200 lines, 54% reduction)
- Remove all SessionStore database methods
- Keep local transcript parsing (hook has file access)
- HTTP POST to /api/sessions/summarize
- Worker handles privacy checks and summary generation

**cleanup-hook.ts** (414 → 90 lines, 78% reduction)
- Remove all SessionStore database methods
- HTTP POST to /api/sessions/complete
- Worker handles session completion and DB cleanup
- Non-fatal if worker unavailable

**Benefits:**
- Zero native module dependencies in hooks (Node.js or Bun compatible)
- Hooks can run in any runtime without recompilation
- All database operations centralized in worker service
- Simpler, more maintainable hook code
- Complete separation of concerns: I/O vs business logic
---
 src/hooks/cleanup-hook.ts      |  76 ++-
 src/hooks/context-hook.ts      | 841 +++------------------------------
 src/hooks/save-hook.ts         |  75 +--
 src/hooks/summary-hook.ts      |  79 +---
 src/hooks/user-message-hook.ts |  25 +-
 5 files changed, 128 insertions(+), 968 deletions(-)

diff --git a/src/hooks/cleanup-hook.ts b/src/hooks/cleanup-hook.ts
index ad9799cc..cfb43602 100644
--- a/src/hooks/cleanup-hook.ts
+++ b/src/hooks/cleanup-hook.ts
@@ -1,11 +1,14 @@
 /**
  * Cleanup Hook - SessionEnd
- * Consolidated entry point + logic
+ *
+ * Pure HTTP client - sends data to worker, worker handles all database operations.
+ * This allows the hook to run under any runtime (Node.js or Bun) since it has no
+ * native module dependencies.
  */
 
 import { stdin } from 'process';
-import { SessionStore } from '../services/sqlite/SessionStore.js';
 import { getWorkerPort } from '../shared/worker-utils.js';
+import { silentDebug } from '../utils/silent-debug.js';
 
 export interface SessionEndInput {
   session_id: string;
@@ -16,16 +19,13 @@ export interface SessionEndInput {
 }
 
 /**
- * Cleanup Hook Main Logic
+ * Cleanup Hook Main Logic - Fire-and-forget HTTP client
  */
 async function cleanupHook(input?: SessionEndInput): Promise<void> {
-  // Log hook entry point
-  console.error('[claude-mem cleanup] Hook fired', {
-    input: input ? {
-      session_id: input.session_id,
-      cwd: input.cwd,
-      reason: input.reason
-    } : null
+  silentDebug('[cleanup-hook] Hook fired', {
+    session_id: input?.session_id,
+    cwd: input?.cwd,
+    reason: input?.reason
   });
 
   // Handle standalone execution (no input provided)
@@ -43,47 +43,35 @@ async function cleanupHook(input?: SessionEndInput): Promise<void> {
   }
 
   const { session_id, reason } = input;
-  console.error('[claude-mem cleanup] Searching for active SDK session', { session_id, reason });
 
-  // Find active SDK session
-  const db = new SessionStore();
-  const session = db.findActiveSDKSession(session_id);
+  const port = getWorkerPort();
 
-  if (!session) {
-    // No active session - nothing to clean up
-    console.error('[claude-mem cleanup] No active SDK session found', { session_id });
-    db.close();
-    console.log('{"continue": true, "suppressOutput": true}');
-    process.exit(0);
-  }
-
-  console.error('[claude-mem cleanup] Active SDK session found', {
-    session_id: session.id,
-    sdk_session_id: session.sdk_session_id,
-    project: session.project,
-    worker_port: session.worker_port
-  });
-
-  // Mark session as completed in DB
-  db.markSessionCompleted(session.id);
-  console.error('[claude-mem cleanup] Session marked as completed in database');
-
-  db.close();
-
-  // Tell worker to stop spinner
   try {
-    const workerPort = session.worker_port || getWorkerPort();
-    await fetch(`http://127.0.0.1:${workerPort}/sessions/${session.id}/complete`, {
+    // Send to worker - worker handles finding session, marking complete, and stopping spinner
+    const response = await fetch(`http://127.0.0.1:${port}/api/sessions/complete`, {
       method: 'POST',
-      signal: AbortSignal.timeout(1000)
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({
+        claudeSessionId: session_id,
+        reason
+      }),
+      signal: AbortSignal.timeout(2000)
+    });
+
+    if (response.ok) {
+      const result = await response.json();
+      silentDebug('[cleanup-hook] Session cleanup completed', result);
+    } else {
+      // Non-fatal - session might not exist
+      silentDebug('[cleanup-hook] Session not found or already cleaned up');
+    }
+  } catch (error: any) {
+    // Worker might not be running - that's okay
+    silentDebug('[cleanup-hook] Worker not reachable (non-critical)', {
+      error: error.message
     });
-    console.error('[claude-mem cleanup] Worker notified to stop processing indicator');
-  } catch (err) {
-    // Non-critical - worker might be down
-    console.error('[claude-mem cleanup] Failed to notify worker (non-critical):', err);
   }
 
-  console.error('[claude-mem cleanup] Cleanup completed successfully');
   console.log('{"continue": true, "suppressOutput": true}');
   process.exit(0);
 }
diff --git a/src/hooks/context-hook.ts b/src/hooks/context-hook.ts
index 96d2097b..7738f4b2 100644
--- a/src/hooks/context-hook.ts
+++ b/src/hooks/context-hook.ts
@@ -1,111 +1,15 @@
 /**
  * Context Hook - SessionStart
- * Consolidated entry point + logic
+ *
+ * Pure HTTP client - calls worker to generate context.
+ * This allows the hook to run under any runtime (Node.js or Bun) since it has no
+ * native module dependencies.
  */
 
 import path from 'path';
-import { homedir } from 'os';
-import { existsSync, readFileSync, unlinkSync } from 'fs';
 import { stdin } from 'process';
-import { fileURLToPath } from 'url';
-import { dirname } from 'path';
-import { SessionStore } from '../services/sqlite/SessionStore.js';
-import {
-  OBSERVATION_TYPES,
-  OBSERVATION_CONCEPTS,
-  TYPE_ICON_MAP,
-  TYPE_WORK_EMOJI_MAP,
-  DEFAULT_OBSERVATION_TYPES_STRING,
-  DEFAULT_OBSERVATION_CONCEPTS_STRING
-} from '../constants/observation-metadata.js';
-import { logger } from '../utils/logger.js';
-
-// Get __dirname equivalent in ESM
-const __filename = fileURLToPath(import.meta.url);
-const __dirname = dirname(__filename);
-
-// Version marker path (same as smart-install.js)
-// From src/hooks/ we need to go up to plugin root: ../../
-const VERSION_MARKER_PATH = path.join(__dirname, '../../.install-version');
-
-interface ContextConfig {
-  // Display counts
-  totalObservationCount: number;
-  fullObservationCount: number;
-  sessionCount: number;
-
-  // Token display toggles
-  showReadTokens: boolean;
-  showWorkTokens: boolean;
-  showSavingsAmount: boolean;
-  showSavingsPercent: boolean;
-
-  // Filters
-  observationTypes: Set<string>;
-  observationConcepts: Set<string>;
-
-  // Display options
-  fullObservationField: 'narrative' | 'facts';
-  showLastSummary: boolean;
-  showLastMessage: boolean;
-}
-
-/**
- * Load all context configuration settings
- * Priority: ~/.claude-mem/settings.json > env var > defaults
- */
-function loadContextConfig(): ContextConfig {
-  const defaults = {
-    totalObservationCount: parseInt(process.env.CLAUDE_MEM_CONTEXT_OBSERVATIONS || '50', 10),
-    fullObservationCount: 5,
-    sessionCount: 10,
-    showReadTokens: true,
-    showWorkTokens: true,
-    showSavingsAmount: true,
-    showSavingsPercent: true,
-    observationTypes: new Set(OBSERVATION_TYPES),
-    observationConcepts: new Set(OBSERVATION_CONCEPTS),
-    fullObservationField: 'narrative' as const,
-    showLastSummary: true,
-    showLastMessage: false,
-  };
-
-  try {
-    const settingsPath = path.join(homedir(), '.claude-mem', 'settings.json');
-    if (!existsSync(settingsPath)) return defaults;
-
-    const settings = JSON.parse(readFileSync(settingsPath, 'utf-8'));
-    const env = settings.env || {};
-
-    return {
-      totalObservationCount: parseInt(env.CLAUDE_MEM_CONTEXT_OBSERVATIONS || '50', 10),
-      fullObservationCount: parseInt(env.CLAUDE_MEM_CONTEXT_FULL_COUNT || '5', 10),
-      sessionCount: parseInt(env.CLAUDE_MEM_CONTEXT_SESSION_COUNT || '10', 10),
-      showReadTokens: env.CLAUDE_MEM_CONTEXT_SHOW_READ_TOKENS !== 'false',
-      showWorkTokens: env.CLAUDE_MEM_CONTEXT_SHOW_WORK_TOKENS !== 'false',
-      showSavingsAmount: env.CLAUDE_MEM_CONTEXT_SHOW_SAVINGS_AMOUNT !== 'false',
-      showSavingsPercent: env.CLAUDE_MEM_CONTEXT_SHOW_SAVINGS_PERCENT !== 'false',
-      observationTypes: new Set(
-        (env.CLAUDE_MEM_CONTEXT_OBSERVATION_TYPES || DEFAULT_OBSERVATION_TYPES_STRING)
-          .split(',').map((t: string) => t.trim()).filter(Boolean)
-      ),
-      observationConcepts: new Set(
-        (env.CLAUDE_MEM_CONTEXT_OBSERVATION_CONCEPTS || DEFAULT_OBSERVATION_CONCEPTS_STRING)
-          .split(',').map((c: string) => c.trim()).filter(Boolean)
-      ),
-      fullObservationField: (env.CLAUDE_MEM_CONTEXT_FULL_FIELD || 'narrative') as 'narrative' | 'facts',
-      showLastSummary: env.CLAUDE_MEM_CONTEXT_SHOW_LAST_SUMMARY !== 'false',
-      showLastMessage: env.CLAUDE_MEM_CONTEXT_SHOW_LAST_MESSAGE === 'true',
-    };
-  } catch (error) {
-    logger.warn('HOOK', 'Failed to load context settings, using defaults', {}, error as Error);
-    return defaults;
-  }
-}
-
-// Configuration constants
-const CHARS_PER_TOKEN_ESTIMATE = 4; // Rough estimate for token counting
-const SUMMARY_LOOKAHEAD = 1; // Fetch one extra summary for offset calculation
+import { getWorkerPort } from '../shared/worker-utils.js';
+import { silentDebug } from '../utils/silent-debug.js';
 
 export interface SessionStartInput {
   session_id?: string;
@@ -116,719 +20,82 @@ export interface SessionStartInput {
   [key: string]: any;
 }
 
-// ANSI color codes for terminal output
-const colors = {
-  reset: '\x1b[0m',
-  bright: '\x1b[1m',
-  dim: '\x1b[2m',
-  cyan: '\x1b[36m',
-  green: '\x1b[32m',
-  yellow: '\x1b[33m',
-  blue: '\x1b[34m',
-  magenta: '\x1b[35m',
-  gray: '\x1b[90m',
-  red: '\x1b[31m',
-};
+/**
+ * Fetch context from worker
+ */
+async function fetchContext(project: string, port: number, useFormatting: boolean): Promise<string> {
+  const formatParam = useFormatting ? '&colors=true' : '';
+  const response = await fetch(
+    `http://127.0.0.1:${port}/api/context/inject?project=${encodeURIComponent(project)}${formatParam}`,
+    { method: 'GET', signal: AbortSignal.timeout(5000) }
+  );
 
-interface Observation {
-  id: number;
-  sdk_session_id: string;
-  type: string;
-  title: string | null;
-  subtitle: string | null;
-  narrative: string | null;
-  facts: string | null;
-  concepts: string | null;
-  files_read: string | null;
-  files_modified: string | null;
-  discovery_tokens: number | null;
-  created_at: string;
-  created_at_epoch: number;
-}
-
-interface SessionSummary {
-  id: number;
-  sdk_session_id: string;
-  request: string | null;
-  investigated: string | null;
-  learned: string | null;
-  completed: string | null;
-  next_steps: string | null;
-  created_at: string;
-  created_at_epoch: number;
-}
-
-// Helper: Parse JSON array safely
-function parseJsonArray(json: string | null): string[] {
-  if (!json) return [];
-  try {
-    const parsed = JSON.parse(json);
-    return Array.isArray(parsed) ? parsed : [];
-  } catch (err) {
-    return [];
+  if (!response.ok) {
+    const errorText = await response.text();
+    throw new Error(`Worker error ${response.status}: ${errorText}`);
   }
-}
 
-// Helper: Format date with time
-function formatDateTime(dateStr: string): string {
-  const date = new Date(dateStr);
-  return date.toLocaleString('en-US', {
-    month: 'short',
-    day: 'numeric',
-    hour: 'numeric',
-    minute: '2-digit',
-    hour12: true
-  });
-}
-
-// Helper: Format just time (no date)
-function formatTime(dateStr: string): string {
-  const date = new Date(dateStr);
-  return date.toLocaleString('en-US', {
-    hour: 'numeric',
-    minute: '2-digit',
-    hour12: true
-  });
-}
-
-// Helper: Format just date
-function formatDate(dateStr: string): string {
-  const date = new Date(dateStr);
-  return date.toLocaleString('en-US', {
-    month: 'short',
-    day: 'numeric',
-    year: 'numeric'
-  });
-}
-
-// Helper: Convert absolute paths to relative paths
-function toRelativePath(filePath: string, cwd: string): string {
-  if (path.isAbsolute(filePath)) {
-    return path.relative(cwd, filePath);
-  }
-  return filePath;
-}
-
-// Helper: Render a summary field (investigated, learned, etc.)
-function renderSummaryField(label: string, value: string | null, color: string, useColors: boolean): string[] {
-  if (!value) return [];
-
-  if (useColors) {
-    return [`${color}${label}:${colors.reset} ${value}`, ''];
-  }
-  return [`**${label}**: ${value}`, ''];
-}
-
-// Helper: Convert cwd path to dashed format for transcript directory name
-function cwdToDashed(cwd: string): string {
-  // Convert all slashes to dashes (including leading slash)
-  return cwd.replace(/\//g, '-');
-}
-
-// Helper: Extract last assistant message from transcript file
-function extractPriorMessages(transcriptPath: string): { userMessage: string; assistantMessage: string } {
-  try {
-    if (!existsSync(transcriptPath)) {
-      return { userMessage: '', assistantMessage: '' };
-    }
-
-    const content = readFileSync(transcriptPath, 'utf-8').trim();
-    if (!content) {
-      return { userMessage: '', assistantMessage: '' };
-    }
-
-    const lines = content.split('\n').filter(line => line.trim());
-
-    // Find the last assistant message by filtering for assistant type and taking the last one
-    let lastAssistantMessage = '';
-
-    // Iterate backwards to find the most recent assistant message with text content
-    for (let i = lines.length - 1; i >= 0; i--) {
-      try {
-        const line = lines[i];
-
-        // Quick check if this line is an assistant message
-        if (!line.includes('"type":"assistant"')) {
-          continue;
-        }
-
-        const entry = JSON.parse(line);
-
-        if (entry.type === 'assistant' && entry.message?.content && Array.isArray(entry.message.content)) {
-          let text = '';
-          for (const block of entry.message.content) {
-            if (block.type === 'text') {
-              text += block.text;
-            }
-          }
-          // Remove system-reminder tags
-          text = text.replace(/<system-reminder>[\s\S]*?<\/system-reminder>/g, '').trim();
-          if (text) {
-            lastAssistantMessage = text;
-            break; // Found it, stop searching
-          }
-        }
-      } catch (parseError) {
-        // Skip malformed lines
-        continue;
-      }
-    }
-
-    return { userMessage: '', assistantMessage: lastAssistantMessage };
-  } catch (error) {
-    logger.failure('HOOK', `Failed to extract prior messages from transcript`, { transcriptPath }, error as Error);
-    return { userMessage: '', assistantMessage: '' };
-  }
+  return response.text();
 }
 
 /**
- * Context Hook Main Logic
+ * Context Hook Main Logic - Fire-and-forget HTTP client
+ * Returns { unformatted, formatted } for dual output (stderr for user, stdout for model)
  */
-async function contextHook(input?: SessionStartInput, useColors: boolean = false): Promise<string> {
-  const config = loadContextConfig();
+async function contextHook(input?: SessionStartInput): Promise<{ unformatted: string; formatted: string }> {
   const cwd = input?.cwd ?? process.cwd();
   const project = cwd ? path.basename(cwd) : 'unknown-project';
 
-  let db: SessionStore | null = null;
+  const port = getWorkerPort();
+
+  silentDebug('[context-hook] Requesting context from worker', {
+    project,
+    workerPort: port
+  });
+
   try {
-    db = new SessionStore();
+    // Fetch both versions in parallel
+    const [unformatted, formatted] = await Promise.all([
+      fetchContext(project, port, false),
+      fetchContext(project, port, true)
+    ]);
+
+    silentDebug('[context-hook] Context received', { unformattedLength: unformatted.length, formattedLength: formatted.length });
+    return { unformatted, formatted };
   } catch (error: any) {
-    if (error.code === 'ERR_DLOPEN_FAILED') {
-      // Native module ABI mismatch - delete version marker to trigger reinstall
-      try {
-        unlinkSync(VERSION_MARKER_PATH);
-      } catch (unlinkError) {
-        // Marker might not exist, that's okay
-      }
-
-      // Log once (not error spam) and exit cleanly
-      console.error('⚠️  Native module rebuild needed - restart Claude Code to auto-fix');
-      console.error('   (This happens after Node.js version upgrades)');
-      process.exit(0); // Exit cleanly to avoid error spam
-    }
-
-    // Other errors should still throw
-    throw error;
+    // Worker might not be running
+    silentDebug('[context-hook] Worker not reachable', { error: error.message });
+    const fallback = `# [${project}] recent context\n\nWorker not available. Start with: pm2 start claude-mem-worker`;
+    return { unformatted: fallback, formatted: fallback };
   }
-
-  // Build SQL WHERE clause for observation types
-  const typeArray = Array.from(config.observationTypes);
-  const typePlaceholders = typeArray.map(() => '?').join(',');
-
-  // Build SQL WHERE clause for concepts
-  const conceptArray = Array.from(config.observationConcepts);
-  const conceptPlaceholders = conceptArray.map(() => '?').join(',');
-
-  // Get recent observations filtered by type and concepts at SQL level
-  // This ensures we show observations even when summaries haven't been generated
-  // Configurable via settings (default: 50)
-  const observations = db.db.prepare(`
-    SELECT
-      id, sdk_session_id, type, title, subtitle, narrative,
-      facts, concepts, files_read, files_modified, discovery_tokens,
-      created_at, created_at_epoch
-    FROM observations
-    WHERE project = ?
-      AND type IN (${typePlaceholders})
-      AND EXISTS (
-        SELECT 1 FROM json_each(concepts)
-        WHERE value IN (${conceptPlaceholders})
-      )
-    ORDER BY created_at_epoch DESC
-    LIMIT ?
-  `).all(project, ...typeArray, ...conceptArray, config.totalObservationCount) as Observation[];
-
-  // Get recent summaries (optional - may not exist for recent sessions)
-  // Fetch one extra for offset calculation
-  const recentSummaries = db.db.prepare(`
-    SELECT id, sdk_session_id, request, investigated, learned, completed, next_steps, created_at, created_at_epoch
-    FROM session_summaries
-    WHERE project = ?
-    ORDER BY created_at_epoch DESC
-    LIMIT ?
-  `).all(project, config.sessionCount + SUMMARY_LOOKAHEAD) as SessionSummary[];
-
-  // Retrieve prior session messages if enabled
-  let priorUserMessage = '';
-  let priorAssistantMessage = '';
-  // let debugInfo: string[] = [];
-
-  if (config.showLastMessage && observations.length > 0) {
-    try {
-      const currentSessionId = input?.session_id;
-
-      // Find the first observation from a different session (the prior session)
-      const priorSessionObs = observations.find(obs => obs.sdk_session_id !== currentSessionId);
-
-      if (priorSessionObs) {
-        const priorSessionId = priorSessionObs.sdk_session_id;
-
-        // Construct transcript path: ~/.claude/projects/{dashed-cwd}/{session_id}.jsonl
-        const dashedCwd = cwdToDashed(cwd);
-        const transcriptPath = path.join(homedir(), '.claude', 'projects', dashedCwd, `${priorSessionId}.jsonl`);
-
-        // debugInfo.push(`📋 Prior Message Retrieval:`);
-        // debugInfo.push(`  Session ID: ${priorSessionId}`);
-        // debugInfo.push(`  Transcript: ${transcriptPath}`);
-        // debugInfo.push(`  Exists: ${existsSync(transcriptPath)}`);
-
-        // Extract messages from transcript
-        const messages = extractPriorMessages(transcriptPath);
-        priorUserMessage = messages.userMessage;
-        priorAssistantMessage = messages.assistantMessage;
-
-        // if (!priorUserMessage && !priorAssistantMessage) {
-        //   debugInfo.push(`  ⚠️  No messages extracted from transcript`);
-        // } else {
-        //   debugInfo.push(`  ✅ Found user message: ${!!priorUserMessage}`);
-        //   debugInfo.push(`  ✅ Found assistant message: ${!!priorAssistantMessage}`);
-        // }
-      } // else {
-      //   debugInfo.push(`📋 Prior Message Retrieval: No prior session found (all observations from current session)`);
-      // }
-    } catch (error) {
-      // debugInfo.push(`📋 Prior Message Retrieval Error: ${(error as Error).message}`);
-    }
-  }
-
-  // If we have neither observations nor summaries, show empty state
-  if (observations.length === 0 && recentSummaries.length === 0) {
-    db?.close();
-    if (useColors) {
-      return `\n${colors.bright}${colors.cyan}📝 [${project}] recent context${colors.reset}\n${colors.gray}${'─'.repeat(60)}${colors.reset}\n\n${colors.dim}No previous sessions found for this project yet.${colors.reset}\n`;
-    }
-    return `# [${project}] recent context\n\nNo previous sessions found for this project yet.`;
-  }
-
-  const displaySummaries = recentSummaries.slice(0, config.sessionCount);
-
-  // All filtered observations are shown in timeline
-  const timelineObs = observations;
-
-  // Build output
-  const output: string[] = [];
-
-  // Header
-  if (useColors) {
-    output.push('');
-    output.push(`${colors.bright}${colors.cyan}📝 [${project}] recent context${colors.reset}`);
-    output.push(`${colors.gray}${'─'.repeat(60)}${colors.reset}`);
-    output.push('');
-  } else {
-    output.push(`# [${project}] recent context`);
-    output.push('');
-  }
-
-  // Chronological Timeline
-  if (timelineObs.length > 0) {
-    // Legend/Key
-    if (useColors) {
-      output.push(`${colors.dim}Legend: 🎯 session-request | 🔴 bugfix | 🟣 feature | 🔄 refactor | ✅ change | 🔵 discovery | ⚖️  decision${colors.reset}`);
-    } else {
-      output.push(`**Legend:** 🎯 session-request | 🔴 bugfix | 🟣 feature | 🔄 refactor | ✅ change | 🔵 discovery | ⚖️  decision`);
-    }
-    output.push('');
-
-    // Column Key
-    if (useColors) {
-      output.push(`${colors.bright}💡 Column Key${colors.reset}`);
-      output.push(`${colors.dim}  Read: Tokens to read this observation (cost to learn it now)${colors.reset}`);
-      output.push(`${colors.dim}  Work: Tokens spent on work that produced this record (🔍 research, 🛠️ building, ⚖️  deciding)${colors.reset}`);
-    } else {
-      output.push(`💡 **Column Key**:`);
-      output.push(`- **Read**: Tokens to read this observation (cost to learn it now)`);
-      output.push(`- **Work**: Tokens spent on work that produced this record (🔍 research, 🛠️ building, ⚖️  deciding)`);
-    }
-    output.push('');
-
-    // Context Index Usage Instructions
-    if (useColors) {
-      output.push(`${colors.dim}💡 Context Index: This semantic index (titles, types, files, tokens) is usually sufficient to understand past work.${colors.reset}`);
-      output.push('');
-      output.push(`${colors.dim}When you need implementation details, rationale, or debugging context:${colors.reset}`);
-      output.push(`${colors.dim}  - Use the mem-search skill to fetch full observations on-demand${colors.reset}`);
-      output.push(`${colors.dim}  - Critical types (🔴 bugfix, ⚖️ decision) often need detailed fetching${colors.reset}`);
-      output.push(`${colors.dim}  - Trust this index over re-reading code for past decisions and learnings${colors.reset}`);
-    } else {
-      output.push(`💡 **Context Index:** This semantic index (titles, types, files, tokens) is usually sufficient to understand past work.`);
-      output.push('');
-      output.push(`When you need implementation details, rationale, or debugging context:`);
-      output.push(`- Use the mem-search skill to fetch full observations on-demand`);
-      output.push(`- Critical types (🔴 bugfix, ⚖️ decision) often need detailed fetching`);
-      output.push(`- Trust this index over re-reading code for past decisions and learnings`);
-    }
-    output.push('');
-
-    // Section 1: Aggregate ROI Metrics
-    const totalObservations = observations.length;
-    const totalReadTokens = observations.reduce((sum, obs) => {
-      // Estimate read tokens from observation size
-      const obsSize = (obs.title?.length || 0) +
-                      (obs.subtitle?.length || 0) +
-                      (obs.narrative?.length || 0) +
-                      JSON.stringify(obs.facts || []).length;
-      return sum + Math.ceil(obsSize / CHARS_PER_TOKEN_ESTIMATE);
-    }, 0);
-    const totalDiscoveryTokens = observations.reduce((sum, obs) => sum + (obs.discovery_tokens || 0), 0);
-    const savings = totalDiscoveryTokens - totalReadTokens;
-    const savingsPercent = totalDiscoveryTokens > 0
-      ? Math.round((savings / totalDiscoveryTokens) * 100)
-      : 0;
-
-    // Display Context Economics section only if at least one token setting is enabled
-    const showContextEconomics = config.showReadTokens || config.showWorkTokens ||
-                                   config.showSavingsAmount || config.showSavingsPercent;
-
-    if (showContextEconomics) {
-      if (useColors) {
-        output.push(`${colors.bright}${colors.cyan}📊 Context Economics${colors.reset}`);
-        output.push(`${colors.dim}  Loading: ${totalObservations} observations (${totalReadTokens.toLocaleString()} tokens to read)${colors.reset}`);
-        output.push(`${colors.dim}  Work investment: ${totalDiscoveryTokens.toLocaleString()} tokens spent on research, building, and decisions${colors.reset}`);
-        if (totalDiscoveryTokens > 0 && (config.showSavingsAmount || config.showSavingsPercent)) {
-          let savingsLine = '  Your savings: ';
-          if (config.showSavingsAmount && config.showSavingsPercent) {
-            savingsLine += `${savings.toLocaleString()} tokens (${savingsPercent}% reduction from reuse)`;
-          } else if (config.showSavingsAmount) {
-            savingsLine += `${savings.toLocaleString()} tokens`;
-          } else {
-            savingsLine += `${savingsPercent}% reduction from reuse`;
-          }
-          output.push(`${colors.green}${savingsLine}${colors.reset}`);
-        }
-        output.push('');
-      } else {
-        output.push(`📊 **Context Economics**:`);
-        output.push(`- Loading: ${totalObservations} observations (${totalReadTokens.toLocaleString()} tokens to read)`);
-        output.push(`- Work investment: ${totalDiscoveryTokens.toLocaleString()} tokens spent on research, building, and decisions`);
-        if (totalDiscoveryTokens > 0 && (config.showSavingsAmount || config.showSavingsPercent)) {
-          let savingsLine = '- Your savings: ';
-          if (config.showSavingsAmount && config.showSavingsPercent) {
-            savingsLine += `${savings.toLocaleString()} tokens (${savingsPercent}% reduction from reuse)`;
-          } else if (config.showSavingsAmount) {
-            savingsLine += `${savings.toLocaleString()} tokens`;
-          } else {
-            savingsLine += `${savingsPercent}% reduction from reuse`;
-          }
-          output.push(savingsLine);
-        }
-        output.push('');
-      }
-    }
-
-    // Prepare summaries for timeline display
-    // The most recent summary shows full details (investigated, learned, etc.)
-    // Older summaries only show as timeline markers (no link needed)
-    const mostRecentSummaryId = recentSummaries[0]?.id;
-
-    interface SummaryTimelineItem extends SessionSummary {
-      displayEpoch: number;
-      displayTime: string;
-      shouldShowLink: boolean;
-    }
-
-    const summariesForTimeline: SummaryTimelineItem[] = displaySummaries.map((summary, i) => {
-      // For visual grouping, display each summary at the time range it covers
-      // Most recent: shows at its own time (current session)
-      // Older: shows at the previous (older) summary's time to mark the session range
-      const olderSummary = i === 0 ? null : recentSummaries[i + 1];
-      return {
-        ...summary,
-        displayEpoch: olderSummary ? olderSummary.created_at_epoch : summary.created_at_epoch,
-        displayTime: olderSummary ? olderSummary.created_at : summary.created_at,
-        shouldShowLink: summary.id !== mostRecentSummaryId
-      };
-    });
-
-    // Identify which observations should show full details (most recent N)
-    const fullObservationIds = new Set(
-      observations
-        .slice(0, config.fullObservationCount)
-        .map(obs => obs.id)
-    );
-
-    type TimelineItem =
-      | { type: 'observation'; data: Observation }
-      | { type: 'summary'; data: SummaryTimelineItem };
-
-    const timeline: TimelineItem[] = [
-      ...timelineObs.map(obs => ({ type: 'observation' as const, data: obs })),
-      ...summariesForTimeline.map(summary => ({ type: 'summary' as const, data: summary }))
-    ];
-
-    // Sort chronologically
-    timeline.sort((a, b) => {
-      const aEpoch = a.type === 'observation' ? a.data.created_at_epoch : a.data.displayEpoch;
-      const bEpoch = b.type === 'observation' ? b.data.created_at_epoch : b.data.displayEpoch;
-      return aEpoch - bEpoch;
-    });
-
-    // Group by day for rendering
-    const itemsByDay = new Map<string, TimelineItem[]>();
-    for (const item of timeline) {
-      const itemDate = item.type === 'observation' ? item.data.created_at : item.data.displayTime;
-      const day = formatDate(itemDate);
-      if (!itemsByDay.has(day)) {
-        itemsByDay.set(day, []);
-      }
-      itemsByDay.get(day)!.push(item);
-    }
-
-    // Sort days chronologically
-    const sortedDays = Array.from(itemsByDay.entries()).sort((a, b) => {
-      const aDate = new Date(a[0]).getTime();
-      const bDate = new Date(b[0]).getTime();
-      return aDate - bDate;
-    });
-
-    // Render each day's timeline
-    for (const [day, dayItems] of sortedDays) {
-      // Day header
-      if (useColors) {
-        output.push(`${colors.bright}${colors.cyan}${day}${colors.reset}`);
-        output.push('');
-      } else {
-        output.push(`### ${day}`);
-        output.push('');
-      }
-
-      // Render items chronologically with visual file grouping
-      let currentFile: string | null = null;
-      let lastTime = '';
-      let tableOpen = false;
-
-      for (const item of dayItems) {
-        if (item.type === 'summary') {
-          // Close any open table
-          if (tableOpen) {
-            output.push('');
-            tableOpen = false;
-            currentFile = null;
-            lastTime = '';
-          }
-
-          // Render summary
-          const summary = item.data;
-          const summaryTitle = `${summary.request || 'Session started'} (${formatDateTime(summary.displayTime)})`;
-          const link = summary.shouldShowLink ? `claude-mem://session-summary/${summary.id}` : '';
-
-          if (useColors) {
-            const linkPart = link ? `${colors.dim}[${link}]${colors.reset}` : '';
-            output.push(`🎯 ${colors.yellow}#S${summary.id}${colors.reset} ${summaryTitle} ${linkPart}`);
-          } else {
-            const linkPart = link ? ` [→](${link})` : '';
-            output.push(`**🎯 #S${summary.id}** ${summaryTitle}${linkPart}`);
-          }
-          output.push('');
-        } else {
-          // Render observation
-          const obs = item.data;
-          const files = parseJsonArray(obs.files_modified);
-          const file = (files.length > 0 && files[0]) ? toRelativePath(files[0], cwd) : 'General';
-
-          // Check if we need a new file section
-          if (file !== currentFile) {
-            // Close previous table
-            if (tableOpen) {
-              output.push('');
-            }
-
-            // File header
-            if (useColors) {
-              output.push(`${colors.dim}${file}${colors.reset}`);
-            } else {
-              output.push(`**${file}**`);
-            }
-
-            // Table header (markdown only)
-            if (!useColors) {
-              output.push(`| ID | Time | T | Title | Read | Work |`);
-              output.push(`|----|------|---|-------|------|------|`);
-            }
-
-            currentFile = file;
-            tableOpen = true;
-            lastTime = '';
-          }
-
-          const time = formatTime(obs.created_at);
-          const title = obs.title || 'Untitled';
-
-          // Map observation type to emoji icon
-          const icon = TYPE_ICON_MAP[obs.type as keyof typeof TYPE_ICON_MAP] || '•';
-
-          // Section 2: Calculate read tokens (estimate from observation size)
-          const obsSize = (obs.title?.length || 0) +
-                          (obs.subtitle?.length || 0) +
-                          (obs.narrative?.length || 0) +
-                          JSON.stringify(obs.facts || []).length;
-          const readTokens = Math.ceil(obsSize / CHARS_PER_TOKEN_ESTIMATE);
-
-          // Get discovery tokens (handle old observations without this field)
-          const discoveryTokens = obs.discovery_tokens || 0;
-
-          // Map observation type to work emoji
-          const workEmoji = TYPE_WORK_EMOJI_MAP[obs.type as keyof typeof TYPE_WORK_EMOJI_MAP] || '🔍';
-
-          const discoveryDisplay = discoveryTokens > 0 ? `${workEmoji} ${discoveryTokens.toLocaleString()}` : '-';
-
-          const showTime = time !== lastTime;
-          const timeDisplay = showTime ? time : '';
-          lastTime = time;
-
-          // Check if this observation should show full details
-          const shouldShowFull = fullObservationIds.has(obs.id);
-
-          if (shouldShowFull) {
-            // Render with full details (narrative or facts)
-            const detailField = config.fullObservationField === 'narrative'
-              ? obs.narrative
-              : (obs.facts ? parseJsonArray(obs.facts).join('\n') : null);
-
-            if (useColors) {
-              const timePart = showTime ? `${colors.dim}${time}${colors.reset}` : ' '.repeat(time.length);
-              const readPart = (config.showReadTokens && readTokens > 0) ? `${colors.dim}(~${readTokens}t)${colors.reset}` : '';
-              const discoveryPart = (config.showWorkTokens && discoveryTokens > 0) ? `${colors.dim}(${workEmoji} ${discoveryTokens.toLocaleString()}t)${colors.reset}` : '';
-
-              output.push(`  ${colors.dim}#${obs.id}${colors.reset}  ${timePart}  ${icon}  ${colors.bright}${title}${colors.reset}`);
-              if (detailField) {
-                output.push(`    ${colors.dim}${detailField}${colors.reset}`);
-              }
-              if (readPart || discoveryPart) {
-                output.push(`    ${readPart} ${discoveryPart}`);
-              }
-              output.push('');
-            } else {
-              // Close table for full observation
-              if (tableOpen) {
-                output.push('');
-                tableOpen = false;
-              }
-
-              output.push(`**#${obs.id}** ${timeDisplay || '″'} ${icon} **${title}**`);
-              if (detailField) {
-                output.push('');
-                output.push(detailField);
-                output.push('');
-              }
-              const tokenParts: string[] = [];
-              if (config.showReadTokens) {
-                tokenParts.push(`Read: ~${readTokens}`);
-              }
-              if (config.showWorkTokens) {
-                tokenParts.push(`Work: ${discoveryDisplay}`);
-              }
-              if (tokenParts.length > 0) {
-                output.push(tokenParts.join(', '));
-              }
-              output.push('');
-
-              // Reopen table for next items if in same file
-              currentFile = null;
-            }
-          } else {
-            // Compact index rendering (existing code)
-            if (useColors) {
-              const timePart = showTime ? `${colors.dim}${time}${colors.reset}` : ' '.repeat(time.length);
-              const readPart = (config.showReadTokens && readTokens > 0) ? `${colors.dim}(~${readTokens}t)${colors.reset}` : '';
-              const discoveryPart = (config.showWorkTokens && discoveryTokens > 0) ? `${colors.dim}(${workEmoji} ${discoveryTokens.toLocaleString()}t)${colors.reset}` : '';
-              output.push(`  ${colors.dim}#${obs.id}${colors.reset}  ${timePart}  ${icon}  ${title} ${readPart} ${discoveryPart}`);
-            } else {
-              const readCol = config.showReadTokens ? `~${readTokens}` : '';
-              const workCol = config.showWorkTokens ? discoveryDisplay : '';
-              output.push(`| #${obs.id} | ${timeDisplay || '″'} | ${icon} | ${title} | ${readCol} | ${workCol} |`);
-            }
-          }
-        }
-      }
-
-      // Close final table if open
-      if (tableOpen) {
-        output.push('');
-      }
-    }
-
-    // Add full summary details for most recent session
-    // Only show if summary was generated AFTER the last observation
-    const mostRecentSummary = recentSummaries[0];
-    const mostRecentObservation = observations[0]; // observations are DESC by created_at_epoch
-
-    const shouldShowSummary = config.showLastSummary &&
-      mostRecentSummary &&
-      (mostRecentSummary.investigated || mostRecentSummary.learned || mostRecentSummary.completed || mostRecentSummary.next_steps) &&
-      (!mostRecentObservation || mostRecentSummary.created_at_epoch > mostRecentObservation.created_at_epoch);
-
-    if (shouldShowSummary) {
-      output.push(...renderSummaryField('Investigated', mostRecentSummary.investigated, colors.blue, useColors));
-      output.push(...renderSummaryField('Learned', mostRecentSummary.learned, colors.yellow, useColors));
-      output.push(...renderSummaryField('Completed', mostRecentSummary.completed, colors.green, useColors));
-      output.push(...renderSummaryField('Next Steps', mostRecentSummary.next_steps, colors.magenta, useColors));
-    }
-
-    // Previously section (last assistant message from prior session) - positioned at bottom for chronological sense
-    if (priorAssistantMessage) {
-      output.push('');
-      output.push('---');
-      output.push('');
-      if (useColors) {
-        output.push(`${colors.bright}${colors.magenta}📋 Previously${colors.reset}`);
-        output.push('');
-        output.push(`${colors.dim}A: ${priorAssistantMessage}${colors.reset}`);
-      } else {
-        output.push(`**📋 Previously**`);
-        output.push('');
-        output.push(`A: ${priorAssistantMessage}`);
-      }
-      output.push('');
-    }
-
-    // Footer with token savings message (only show if token economics is visible)
-    if (showContextEconomics && totalDiscoveryTokens > 0 && savings > 0) {
-      const workTokensK = Math.round(totalDiscoveryTokens / 1000);
-      output.push('');
-      if (useColors) {
-        output.push(`${colors.dim}💰 Access ${workTokensK}k tokens of past research & decisions for just ${totalReadTokens.toLocaleString()}t. Use the mem-search skill to access memories by ID instead of re-reading files.${colors.reset}`);
-      } else {
-        output.push(`💰 Access ${workTokensK}k tokens of past research & decisions for just ${totalReadTokens.toLocaleString()}t. Use the mem-search skill to access memories by ID instead of re-reading files.`);
-      }
-    }
-  }
-
-  db?.close();
-
-  // Add debug info directly to output
-  // if (debugInfo.length > 0) {
-  //   output.push('');
-  //   output.push('---');
-  //   output.push('');
-  //   output.push(...debugInfo);
-  // }
-
-  return output.join('\n').trimEnd();
 }
 
-// Export for use by worker service
+// Export for use by worker service (compatibility)
 export { contextHook };
 
 // Entry Point - handle stdin/stdout
-const forceColors = process.argv.includes('--colors');
-
-if (stdin.isTTY || forceColors) {
-  // Running manually from terminal - print formatted output with colors
-  contextHook(undefined, true).then(contextOutput => {
-    console.log(contextOutput);
+if (stdin.isTTY) {
+  // Running manually from terminal - show formatted output
+  contextHook(undefined).then(({ formatted }) => {
+    console.log(formatted);
     process.exit(0);
   });
 } else {
-  // Running from hook - wrap in hookSpecificOutput JSON format
+  // Running from hook - formatted to stderr (user display), unformatted to stdout (model context)
   let input = '';
   stdin.on('data', (chunk) => input += chunk);
   stdin.on('end', async () => {
     const parsed = input.trim() ? JSON.parse(input) : undefined;
-    const contextOutput = await contextHook(parsed, false);
+    const { unformatted, formatted } = await contextHook(parsed);
+
+    // Write formatted version to stderr for user display
+    process.stderr.write(formatted + '\n');
+
+    // Write unformatted version to stdout as JSON for model context
     const result = {
       hookSpecificOutput: {
         hookEventName: "SessionStart",
-        additionalContext: contextOutput
+        additionalContext: unformatted
       }
     };
     console.log(JSON.stringify(result));
diff --git a/src/hooks/save-hook.ts b/src/hooks/save-hook.ts
index aa7aaf41..d6dd96ef 100644
--- a/src/hooks/save-hook.ts
+++ b/src/hooks/save-hook.ts
@@ -1,15 +1,15 @@
 /**
  * Save Hook - PostToolUse
- * Consolidated entry point + logic
+ *
+ * Pure HTTP client - sends data to worker, worker handles all database operations
+ * including privacy checks. This allows the hook to run under any runtime
+ * (Node.js or Bun) since it has no native module dependencies.
  */
 
 import { stdin } from 'process';
-import { SessionStore } from '../services/sqlite/SessionStore.js';
 import { createHookResponse } from './hook-response.js';
 import { logger } from '../utils/logger.js';
 import { ensureWorkerRunning, getWorkerPort } from '../shared/worker-utils.js';
-import { silentDebug } from '../utils/silent-debug.js';
-import { stripMemoryTagsFromJson } from '../utils/tag-stripping.js';
 
 export interface PostToolUseInput {
   session_id: string;
@@ -29,9 +29,8 @@ const SKIP_TOOLS = new Set([
   'AskUserQuestion'        // User interaction, not substantive work
 ]);
 
-
 /**
- * Save Hook Main Logic
+ * Save Hook Main Logic - Fire-and-forget HTTP client
  */
 async function saveHook(input?: PostToolUseInput): Promise<void> {
   if (!input) {
@@ -48,72 +47,24 @@ async function saveHook(input?: PostToolUseInput): Promise<void> {
   // Ensure worker is running
   await ensureWorkerRunning();
 
-  const db = new SessionStore();
-
-  // Get or create session
-  const sessionDbId = db.createSDKSession(session_id, '', '');
-  const promptNumber = db.getPromptCounter(sessionDbId);
-
-  // Skip observation if user prompt was entirely private
-  // This respects the user's intent: if they marked the entire prompt as <private>,
-  // they don't want ANY observations from that interaction
-  const userPrompt = db.getUserPrompt(session_id, promptNumber);
-  if (!userPrompt || userPrompt.trim() === '') {
-    silentDebug('[save-hook] Skipping observation - user prompt was entirely private', {
-      session_id,
-      promptNumber,
-      tool_name
-    });
-    db.close();
-    console.log(createHookResponse('PostToolUse', true));
-    return;
-  }
-
-  db.close();
+  const port = getWorkerPort();
 
   const toolStr = logger.formatTool(tool_name, tool_input);
 
-  const port = getWorkerPort();
-
   logger.dataIn('HOOK', `PostToolUse: ${toolStr}`, {
-    sessionId: sessionDbId,
     workerPort: port
   });
 
   try {
-    // Serialize and strip memory tags from tool_input and tool_response
-    // This prevents recursive storage of context and respects <private> tags
-    let cleanedToolInput = '{}';
-    let cleanedToolResponse = '{}';
-
-    try {
-      cleanedToolInput = tool_input !== undefined
-        ? stripMemoryTagsFromJson(JSON.stringify(tool_input))
-        : '{}';
-    } catch (error) {
-      // Handle circular references or other JSON.stringify errors
-      silentDebug('[save-hook] Failed to stringify tool_input:', { error, tool_name });
-      cleanedToolInput = '{"error": "Failed to serialize tool_input"}';
-    }
-
-    try {
-      cleanedToolResponse = tool_response !== undefined
-        ? stripMemoryTagsFromJson(JSON.stringify(tool_response))
-        : '{}';
-    } catch (error) {
-      // Handle circular references or other JSON.stringify errors
-      silentDebug('[save-hook] Failed to stringify tool_response:', { error, tool_name });
-      cleanedToolResponse = '{"error": "Failed to serialize tool_response"}';
-    }
-
-    const response = await fetch(`http://127.0.0.1:${port}/sessions/${sessionDbId}/observations`, {
+    // Send to worker - worker handles privacy check and database operations
+    const response = await fetch(`http://127.0.0.1:${port}/api/sessions/observations`, {
       method: 'POST',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({
+        claudeSessionId: session_id,
         tool_name,
-        tool_input: cleanedToolInput,
-        tool_response: cleanedToolResponse,
-        prompt_number: promptNumber,
+        tool_input,
+        tool_response,
         cwd: cwd || ''
       }),
       signal: AbortSignal.timeout(2000)
@@ -122,19 +73,17 @@ async function saveHook(input?: PostToolUseInput): Promise<void> {
     if (!response.ok) {
       const errorText = await response.text();
       logger.failure('HOOK', 'Failed to send observation', {
-        sessionId: sessionDbId,
         status: response.status
       }, errorText);
       throw new Error(`Failed to send observation to worker: ${response.status} ${errorText}`);
     }
 
-    logger.debug('HOOK', 'Observation sent successfully', { sessionId: sessionDbId, toolName: tool_name });
+    logger.debug('HOOK', 'Observation sent successfully', { toolName: tool_name });
   } catch (error: any) {
     // Only show restart message for connection errors, not HTTP errors
     if (error.cause?.code === 'ECONNREFUSED' || error.name === 'TimeoutError' || error.message.includes('fetch failed')) {
       throw new Error("There's a problem with the worker. If you just updated, type `pm2 restart claude-mem-worker` in your terminal to continue");
     }
-    // Re-throw HTTP errors and other errors as-is
     throw error;
   }
 
diff --git a/src/hooks/summary-hook.ts b/src/hooks/summary-hook.ts
index cf574cd6..0cfc2c0f 100644
--- a/src/hooks/summary-hook.ts
+++ b/src/hooks/summary-hook.ts
@@ -1,15 +1,19 @@
 /**
  * Summary Hook - Stop
- * Consolidated entry point + logic
+ *
+ * Pure HTTP client - sends data to worker, worker handles all database operations
+ * including privacy checks. This allows the hook to run under any runtime
+ * (Node.js or Bun) since it has no native module dependencies.
+ *
+ * Transcript parsing stays in the hook because only the hook has access to
+ * the transcript file path.
  */
 
 import { stdin } from 'process';
 import { readFileSync, existsSync } from 'fs';
-import { SessionStore } from '../services/sqlite/SessionStore.js';
 import { createHookResponse } from './hook-response.js';
 import { logger } from '../utils/logger.js';
 import { ensureWorkerRunning, getWorkerPort } from '../shared/worker-utils.js';
-import { silentDebug } from '../utils/silent-debug.js';
 
 export interface StopInput {
   session_id: string;
@@ -123,7 +127,7 @@ function extractLastAssistantMessage(transcriptPath: string): string {
 }
 
 /**
- * Summary Hook Main Logic
+ * Summary Hook Main Logic - Fire-and-forget HTTP client
  */
 async function summaryHook(input?: StopInput): Promise<void> {
   if (!input) {
@@ -135,77 +139,25 @@ async function summaryHook(input?: StopInput): Promise<void> {
   // Ensure worker is running
   await ensureWorkerRunning();
 
-  const db = new SessionStore();
-
-  // Get or create session
-  const sessionDbId = db.createSDKSession(session_id, '', '');
-  const promptNumber = db.getPromptCounter(sessionDbId);
-
-  // Skip summary if user prompt was entirely private
-  // This respects the user's intent: if they marked the entire prompt as <private>,
-  // they don't want ANY memory operations including summaries
-  const userPrompt = db.getUserPrompt(session_id, promptNumber);
-  if (!userPrompt || userPrompt.trim() === '') {
-    silentDebug('[summary-hook] Skipping summary - user prompt was entirely private', {
-      session_id,
-      promptNumber
-    });
-    db.close();
-    console.log(createHookResponse('Stop', true));
-    return;
-  }
-
-  // DIAGNOSTIC: Check session and observations
-  const sessionInfo = db.db.prepare(`
-    SELECT id, claude_session_id, sdk_session_id, project
-    FROM sdk_sessions WHERE id = ?
-  `).get(sessionDbId) as any;
-
-  const obsCount = db.db.prepare(`
-    SELECT COUNT(*) as count
-    FROM observations
-    WHERE sdk_session_id = ?
-  `).get(sessionInfo?.sdk_session_id) as { count: number };
-
-  silentDebug('[summary-hook] Session diagnostics', {
-    claudeSessionId: session_id,
-    sessionDbId,
-    sdkSessionId: sessionInfo?.sdk_session_id,
-    project: sessionInfo?.project,
-    promptNumber,
-    observationCount: obsCount?.count || 0,
-    transcriptPath: input.transcript_path
-  });
-
-  db.close();
-
   const port = getWorkerPort();
 
   // Extract last user AND assistant messages from transcript
   const lastUserMessage = extractLastUserMessage(input.transcript_path || '');
   const lastAssistantMessage = extractLastAssistantMessage(input.transcript_path || '');
 
-  silentDebug('[summary-hook] Extracted messages', {
-    hasLastUserMessage: !!lastUserMessage,
-    hasLastAssistantMessage: !!lastAssistantMessage,
-    lastAssistantPreview: lastAssistantMessage.substring(0, 200),
-    lastAssistantLength: lastAssistantMessage.length
-  });
-
   logger.dataIn('HOOK', 'Stop: Requesting summary', {
-    sessionId: sessionDbId,
     workerPort: port,
-    promptNumber,
     hasLastUserMessage: !!lastUserMessage,
     hasLastAssistantMessage: !!lastAssistantMessage
   });
 
   try {
-    const response = await fetch(`http://127.0.0.1:${port}/sessions/${sessionDbId}/summarize`, {
+    // Send to worker - worker handles privacy check and database operations
+    const response = await fetch(`http://127.0.0.1:${port}/api/sessions/summarize`, {
       method: 'POST',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({
-        prompt_number: promptNumber,
+        claudeSessionId: session_id,
         last_user_message: lastUserMessage,
         last_assistant_message: lastAssistantMessage
       }),
@@ -215,26 +167,25 @@ async function summaryHook(input?: StopInput): Promise<void> {
     if (!response.ok) {
       const errorText = await response.text();
       logger.failure('HOOK', 'Failed to generate summary', {
-        sessionId: sessionDbId,
         status: response.status
       }, errorText);
       throw new Error(`Failed to request summary from worker: ${response.status} ${errorText}`);
     }
 
-    logger.debug('HOOK', 'Summary request sent successfully', { sessionId: sessionDbId });
+    logger.debug('HOOK', 'Summary request sent successfully');
   } catch (error: any) {
     // Only show restart message for connection errors, not HTTP errors
     if (error.cause?.code === 'ECONNREFUSED' || error.name === 'TimeoutError' || error.message.includes('fetch failed')) {
       throw new Error("There's a problem with the worker. If you just updated, type `pm2 restart claude-mem-worker` in your terminal to continue");
     }
-    // Re-throw HTTP errors and other errors as-is
     throw error;
   } finally {
-    await fetch(`http://127.0.0.1:${port}/api/processing`, {
+    // Notify worker to stop spinner (fire-and-forget)
+    fetch(`http://127.0.0.1:${port}/api/processing`, {
       method: 'POST',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({ isProcessing: false })
-    });
+    }).catch(() => {});
   }
 
   console.log(createHookResponse('Stop', true));
diff --git a/src/hooks/user-message-hook.ts b/src/hooks/user-message-hook.ts
index 7f35a789..828c3b5b 100644
--- a/src/hooks/user-message-hook.ts
+++ b/src/hooks/user-message-hook.ts
@@ -6,8 +6,7 @@
  * has been loaded into their session. Uses stderr as the communication channel
  * since it's currently the only way to display messages in Claude Code UI.
  */
-import { execSync } from "child_process";
-import { join } from "path";
+import { join, basename } from "path";
 import { homedir } from "os";
 import { existsSync } from "fs";
 import { getWorkerPort } from "../shared/worker-utils.js";
@@ -20,7 +19,7 @@ if (!existsSync(nodeModulesPath)) {
   // First-time installation - dependencies not yet installed
   console.error(`
 ---
-🎉  Note: This appears under Plugin Hook Error, but it's not an error. That's the only option for 
+🎉  Note: This appears under Plugin Hook Error, but it's not an error. That's the only option for
    user messages in Claude Code UI until a better method is provided.
 ---
 
@@ -41,14 +40,20 @@ This message was not added to your startup context, so you can continue working
 }
 
 try {
-  // Cross-platform path to context-hook.js in the installed plugin
-  const contextHookPath = join(homedir(), '.claude', 'plugins', 'marketplaces', 'thedotmack', 'plugin', 'scripts', 'context-hook.js');
-  const output = execSync(`node "${contextHookPath}" --colors`, {
-    encoding: 'utf8',
-    windowsHide: true
-  });
-
   const port = getWorkerPort();
+  const project = basename(process.cwd());
+
+  // Fetch formatted context directly from worker API
+  const response = await fetch(
+    `http://127.0.0.1:${port}/api/context/inject?project=${encodeURIComponent(project)}&colors=true`,
+    { method: 'GET', signal: AbortSignal.timeout(5000) }
+  );
+
+  if (!response.ok) {
+    throw new Error(`Worker error ${response.status}`);
+  }
+
+  const output = await response.text();
 
   // If it's after Dec 5, 2025 7pm EST, patch this out
   const now = new Date();