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claude-mem/docs/public/introduction.mdx
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Alex Newman 61488042d8 Mem-search enhancements: table output, simplified API, Sonnet default, and removed fake URIs (#317)
* feat: Add batch fetching for observations and update documentation

- Implemented a new endpoint for fetching multiple observations by IDs in a single request.
- Updated the DataRoutes to include a POST /api/observations/batch endpoint.
- Enhanced SKILL.md documentation to reflect changes in the search process and batch fetching capabilities.
- Increased the default limit for search results from 5 to 40 for better usability.

* feat!: Fix timeline parameter passing with SearchManager alignment

BREAKING CHANGE: Timeline MCP tools now use standardized parameter names
- anchor_id → anchor
- before → depth_before
- after → depth_after
- obs_type → type (timeline tool only)

Fixes timeline endpoint failures caused by parameter name mismatch between
MCP layer and SearchManager. Adds new SessionStore methods for fetching
prompts and session summaries by ID.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* docs: reframe timeline parameter fix as bug fix, not breaking change

The timeline tools were completely broken due to parameter name mismatch.
There's nothing to migrate from since the old parameters never worked.

Co-authored-by: Alex Newman <thedotmack@users.noreply.github.com>

* Refactor mem-search documentation and optimize API tool definitions

- Updated SKILL.md to emphasize batch fetching for observations, clarifying usage and efficiency.
- Removed deprecated tools from mcp-server.ts and streamlined tool definitions for clarity.
- Enhanced formatting in FormattingService.ts for better output readability.
- Adjusted SearchManager.ts to improve result headers and removed unnecessary search tips from combined text.

* Refactor FormattingService and SearchManager for table-based output

- Updated FormattingService to format search results as tables, including methods for formatting observations, sessions, and user prompts.
- Removed JSON format handling from SearchManager and streamlined result formatting to consistently use table format.
- Enhanced readability and consistency in search tips and formatting logic.
- Introduced token estimation for observations and improved time formatting.

* refactor: update documentation and API references for version bump and search functionalities

* Refactor code structure for improved readability and maintainability

* chore: change default model from haiku to sonnet

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* feat: unify timeline formatting across search and context services

Extract shared timeline formatting utilities into reusable module to align
MCP search output format with context-generator's date/file-grouped format.

Changes:
- Create src/shared/timeline-formatting.ts with reusable utilities
  (parseJsonArray, formatDateTime, formatTime, formatDate, toRelativePath,
  extractFirstFile, groupByDate)
- Refactor context-generator.ts to use shared utilities
- Update SearchManager.search() to use date/file grouping
- Add search-specific row formatters to FormattingService
- Fix timeline methods to extract actual file paths from metadata
  instead of hardcoding 'General'
- Remove Work column from search output (kept in context output)

Result: Consistent date/file-grouped markdown formatting across both
systems while maintaining their different column requirements.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* refactor: remove redundant legend from search output

Remove legend from search/timeline results since it's already shown
in SessionStart context. Saves ~30 tokens per search result.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* Refactor session summary rendering to remove links

- Removed link generation for session summaries in context generation and search manager.
- Updated output formatting to exclude links while maintaining the session summary structure.
- Adjusted related components in TimelineService to ensure consistency across the application.

* fix: move skillPath declaration outside try block to fix scoping bug

The skillPath variable was declared inside the try block but referenced
in the catch block for error logging. Since const is block-scoped, this
would cause a ReferenceError when the error handler executes.

Moved skillPath declaration before the try block so it's accessible in
both try and catch scopes.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* fix: address PR #317 code review feedback

**Critical Fixes:**
- Replace happy_path_error__with_fallback debug calls with proper logger methods in mcp-server.ts
- All HTTP API calls now use logger.debug/error for consistent logging

**Code Quality Improvements:**
- Extract 90-day recency window magic numbers to named constants
- Added RECENCY_WINDOW_DAYS and RECENCY_WINDOW_MS constants in SearchManager

**Documentation:**
- Document model cost implications of Haiku → Sonnet upgrade in CHANGELOG
- Provide clear migration path for users who want to revert to Haiku

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* refactor: simplify CHANGELOG - remove cost documentation

Removed model cost comparison documentation per user feedback.
Kept only the technical code quality improvements.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>
Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Co-authored-by: Alex Newman <thedotmack@users.noreply.github.com>
2025-12-14 21:58:11 -05:00

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5.7 KiB
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---
title: "Introduction"
description: "Persistent memory compression system for Claude Code"
---
# Claude-Mem
**Persistent memory compression system for Claude Code**
Claude-Mem seamlessly preserves context across sessions by automatically capturing tool usage observations, generating semantic summaries, and making them available to future sessions. This enables Claude to maintain continuity of knowledge about projects even after sessions end or reconnect.
## Quick Start
Start a new Claude Code session in the terminal and enter the following commands:
```bash
/plugin marketplace add thedotmack/claude-mem
/plugin install claude-mem
```
Restart Claude Code. Context from previous sessions will automatically appear in new sessions.
## Key Features
- 🧠 **Persistent Memory** - Context survives across sessions
- 🔍 **mem-search Skill** - Query your project history with natural language (~2,250 token savings)
- 🌐 **Web Viewer UI** - Real-time memory stream visualization at http://localhost:37777
- 🔒 **Privacy Control** - Use `<private>` tags to exclude sensitive content from storage
- ⚙️ **Context Configuration** - Fine-grained control over what context gets injected
- 🤖 **Automatic Operation** - No manual intervention required
- 📊 **FTS5 Search** - Fast full-text search across observations
- 🔗 **Citations** - Reference past observations with IDs (access via http://localhost:37777/api/observation/{id} or view all in the web viewer at http://localhost:37777)
## How It Works
```
┌─────────────────────────────────────────────────────────────┐
│ Session Start → Inject context from last 10 sessions │
└─────────────────────────────────────────────────────────────┘
┌─────────────────────────────────────────────────────────────┐
│ User Prompts → Create session, save user prompts │
└─────────────────────────────────────────────────────────────┘
┌─────────────────────────────────────────────────────────────┐
│ Tool Executions → Capture observations (Read, Write, etc.) │
└─────────────────────────────────────────────────────────────┘
┌─────────────────────────────────────────────────────────────┐
│ Worker Processes → Extract learnings via Claude Agent SDK │
└─────────────────────────────────────────────────────────────┘
┌─────────────────────────────────────────────────────────────┐
│ Session Ends → Generate summary, ready for next session │
└─────────────────────────────────────────────────────────────┘
```
**Core Components:**
1. **5 Lifecycle Hooks** - SessionStart, UserPromptSubmit, PostToolUse, Stop, SessionEnd (6 hook scripts)
2. **Smart Install** - Cached dependency checker (pre-hook script)
3. **Worker Service** - HTTP API on port 37777 managed by Bun
4. **SQLite Database** - Stores sessions, observations, summaries with FTS5 search
5. **mem-search Skill** - Query historical context with natural language
6. **Web Viewer UI** - Real-time visualization with SSE and infinite scroll
See [Architecture Overview](architecture/overview) for details.
## System Requirements
- **Node.js**: 18.0.0 or higher
- **Claude Code**: Latest version with plugin support
- **Bun**: JavaScript runtime and process manager (auto-installed if missing)
- **SQLite 3**: For persistent storage (bundled)
## What's New
**v7.1.0 - Bun Migration:**
- Replaced PM2 with native Bun process management
- Switched from better-sqlite3 to bun:sqlite for faster database access
- Automatic one-time migration on first hook trigger
- Simplified cross-platform support
**v7.0.0 - Context Configuration:**
- 11 settings for fine-grained control over context injection
- Dual-tag privacy system (`<private>` tags)
**Previous Highlights:**
- **v5.5.0**: mem-search skill with 100% effectiveness rate
- **v5.4.0**: Skill-based search (~2,250 tokens saved per session)
- **v5.1.0**: Web viewer UI at http://localhost:37777
## Next Steps
<CardGroup cols={2}>
<Card title="Installation" icon="download" href="/installation">
Quick start & advanced installation
</Card>
<Card title="Getting Started" icon="rocket" href="/usage/getting-started">
Learn how Claude-Mem works automatically
</Card>
<Card title="Architecture" icon="sitemap" href="/architecture/overview">
System components & data flow
</Card>
<Card title="Search Tools" icon="magnifying-glass" href="/usage/search-tools">
Query your project history
</Card>
</CardGroup>