MemoCall

An MCP server that lets Claude Code recall the context of your past conversations — from any project — on demand.

Claude Code can resume a session, but getting another conversation's context into the one you're in is a chore — copy-pasting exports or digging through raw transcript files by hand — and resume only sees the current directory anyway. MemoCall turns it into a single ask: "what was I working on?" or "load the session where we set up X", and it pulls that transcript in as clean, compact Markdown — even from a totally different project.

It's read-only. Claude Code already records every session to ~/.claude/projects/<project>/<id>.jsonl; this server just reads those files, strips the noise, collapses tool calls, and hands back a readable transcript. It never writes, hooks, or touches a live session.

What you get

Five tools, available in every session once installed. Claude picks the right one from the request:

| Tool | What it does | |------|--------------| | list_sessions | Your recent conversations across all projects, grouped by directory. "What was I working on?" | | search_sessions | Find a past conversation by keyword (matches titles + first messages + paths). | | load_session | Load one conversation as compact Markdown — by id or query. Optionally a turn window via turns. | | session_outline | A cheap map of one conversation: the numbered list of your prompts. Great for huge sessions. | | search_in_session | Return only the turns within one conversation that match a keyword. |

You don't call these directly — you talk normally and Claude reaches for them:

You:  what sessions have i worked on recently?
You:  load the one where we set up the license invitation system
You:  which session did we debug the keychain SIGKILL thing in?

How the transcript is rendered

Raw transcripts are a verbose event log (one big file hit 11 MB). memocall reduces each turn to the essentials, Conductor-style:

**You:** right now i need to set up a system to invite prospects...
↳ 12 tool calls (Bash ×5, Read ×4, Edit ×3)
**Claude:** I've set up the invitation flow. Key decisions: ...

Tool-call outputs are elided (the big token win, and a privacy win — see below). Abandoned/edited message branches are dropped so you get the conversation as it actually played out. A token budget keeps even an 11 MB session well under Claude Code's MCP output cap via middle-out truncation.

Navigating large sessions

A single response can't hold a 1,000-turn session, so for big ones you don't dump — you navigate:

1. session_outline → a numbered map of every prompt (tiny, fits any session).
2. search_in_session → jump straight to the turns about a topic, or load_session with turns: "300-340" to pull an exact window (turn numbers come from the outline).

So you never lose access to the middle of a huge conversation — load_session alone would middle-out-truncate it, but the outline + range/search tools let Claude reach any part on demand.

Install

Requires Node 18+ and the Claude Code CLI.

git clone https://github.com/baodq06/memocall.git
cd memocall
npm install
npm run build
claude mcp add --scope user memocall -- node "$(pwd)/dist/index.js"

--scope user makes it available in every session, in every directory. Restart Claude Code (or open a new session) and ask it to list your sessions. Verify with claude mcp list — you should see memocall: … ✔ Connected.

Privacy & security

• Local only. No network, no auth, no telemetry. It reads files under ~/.claude/projects/ and nothing else.
• Compact mode elides tool outputs, which is where secrets (tokens, keys, env) usually live — so the default output is much safer than the raw transcript.
• format: "full" includes brief tool inputs and may surface sensitive strings. Use it deliberately.
• Transcripts can contain secrets regardless; treat loaded context as you would the original conversation.

Limitations

• Recall is best-effort: Claude Code deletes transcripts after cleanupPeriodDays (default 30).
• Forked sessions may only contain post-fork turns.
• The transcript format is undocumented and can change between Claude Code versions; all format knowledge is isolated in src/jsonl.ts so it's a one-file patch if it does.

Development

npm run build           # compile TypeScript -> dist/
npm test                # unit suite (node:test) on synthetic fixtures
npm run smoke           # optional: checks all YOUR real sessions stay under the output cap
node dist/parser.js <file.jsonl> [--full|--outline] [--turns 10-20] [--search "kw"] [--max N] [--think]   # test the parser
node test-client.mjs    # drive the server over stdio like Claude Code does
npm run inspect         # open the MCP Inspector UI

Layout:

• src/jsonl.ts — all knowledge of the transcript format (helpers, ordering, classification).
• src/parser.ts — JSONL → compact Markdown (the core transform).
• src/locator.ts — session enumeration + cached metadata index.
• src/index.ts — the MCP server wiring the three tools.

License

MIT