io.github.bighippoman/memoir

Official

by bighippoman · TypeScript

Structured session journals for AI agents. Persistent memory across sessions.

Provides persistent memory storage for AI agents across multiple sessions.

README.md3 KBView on GitHub

memoir-mcp

Structured session journals for AI agents. Persistent memory across sessions -- no more repeating dead ends.

When a session ends, all reasoning is lost -- what was tried, what failed, what's blocked. The next session starts from scratch and repeats the same mistakes. memoir logs it all and hands it off so the next session picks up where the last one left off.

Works with any MCP client: Claude Code, Cursor, Codex, Windsurf, and more.

Install

Claude Code

bash

claude mcp add memoir -s user -- npx -y memoir-mcp

Other MCP clients

bash

npx -y memoir-mcp

How it works

Automatic project detection -- identifies the project by its git root, so logs stay scoped without any configuration.
Implicit sessions -- a session is created automatically on first log. No setup step.
Rolling retention -- keeps the last 20 sessions per project (configurable). Old sessions are pruned automatically.

Tools

Write

Tool	Description
`log_attempt`	Record something that was tried and its outcome.
`log_blocker`	Flag something that's stuck and why.
`resolve_blocker`	Mark a blocker as resolved with what fixed it.
`log_decision`	Record a design or architecture choice and its rationale.
`end_session`	Close the current session with an optional summary.

Read

Tool	Description
`get_handoff`	Structured summary of the last session -- what was attempted, what's blocked, what was decided.
`get_history`	Query past sessions (default: last 3, max 20).
`get_blockers`	List unresolved (or resolved) blockers across all sessions.

Storage

Single SQLite file at ~/.memoir/memoir.db. No API keys, no external services.

Configuration

All limits are configurable via environment variables:

Variable	Default	Description
`MEMOIR_MAX_CONTENT`	500	Max characters for content fields
`MEMOIR_MAX_OUTCOME`	300	Max characters for outcome/resolution fields
`MEMOIR_MAX_ENTRIES`	50	Max entries per session
`MEMOIR_MAX_SESSIONS`	20	Max sessions per project (rolling)

Example with custom limits:

bash

claude mcp add memoir -s user -e MEMOIR_MAX_CONTENT=1000 -e MEMOIR_MAX_ENTRIES=100 -- npx -y memoir-mcp

Handoff output uses a compact format to keep context window usage low.

License

MIT

Install

Configuration

Environment variables

MEMOIR_MAX_CONTENT

Max characters for content fields

MEMOIR_MAX_OUTCOME

Max characters for outcome/resolution fields

MEMOIR_MAX_ENTRIES

Max entries per session

MEMOIR_MAX_SESSIONS

Max sessions per project (rolling)

claude_desktop_config.json

{
  "mcpServers": {
    "memoir": {
      "command": "npx",
      "args": [
        "-y",
        "memoir-mcp@1.0.3"
      ],
      "env": {
        "MEMOIR_MAX_CONTENT": "<YOUR_MEMOIR_MAX_CONTENT>",
        "MEMOIR_MAX_OUTCOME": "<YOUR_MEMOIR_MAX_OUTCOME>",
        "MEMOIR_MAX_ENTRIES": "<YOUR_MEMOIR_MAX_ENTRIES>",
        "MEMOIR_MAX_SESSIONS": "<YOUR_MEMOIR_MAX_SESSIONS>"
      }
    }
  }
}