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mcp-session-insight

mcp-session-insight

by ArtLjn

MCP Session Insight

AI-Native Session Observability for Claude Code, OpenCode, and Codex

简体中文 | English

npm license node MCP TypeScript Vitest


Why session-insight?

AI coding sessions accumulate rich context — file changes, user requests, decisions, errors, git history — but that context vanishes when the session ends. Static rule files cannot answer "what did I work on today?" or "what went wrong in that last session?".

session-insight gives your AI assistant a read-only lens into all past sessions:

  • Session analytics — extract structured insights from JSONL: file changes, decisions, errors, tool usage, todo progress

  • Multi-source collection — read Claude Code JSONL, OpenCode SQLite sessions, and Codex JSONL sessions

  • Real work filtering — Codex collection ignores developer/system prompts and environment metadata, keeping only real user work content

  • EnrichedSummary — returns structured JSON instead of Markdown templates, letting the calling LLM synthesize concise summaries at zero extra API cost

  • Cross-project git logs — collect commit history across all projects with date range, project, and author filters

  • Semantic classification — bash commands classified into 9 categories (build/test/deploy/debug/network/run/git/explore/other)

  • Session handoff — generate structured context for seamless session continuation

Related MCP server: Central Brain

Quick Start

# Install
npm install -g @morningljn/mcp-session-insight

# One-command setup
claude mcp add session-insight -- npx @morningljn/mcp-session-insight

Restart your AI assistant and it can now query all past sessions.

Supported Sources

Source

Default Location

Notes

Claude Code

~/.claude/projects/

Reads project-scoped JSONL sessions

OpenCode

~/.local/share/opencode/opencode.db

Reads SQLite session, message, and part tables

Codex

~/.codex/sessions/

Reads JSONL sessions and filters hidden prompts/context

Manual Setup

Add to ~/.claude/mcp.json:

{
  "mcpServers": {
    "session-insight": {
      "command": "npx",
      "args": ["@morningljn/mcp-session-insight"]
    }
  }
}

Tools

Tool

Description

collect_project_sessions

Use first for daily reports or source-specific collection; returns source counts and structured sessions

list_sessions

List all sessions with optional project filter and limit

show_session

Show session metadata (supports prefix matching on session ID)

search_sessions

Search sessions by keyword in content or ID

get_session_summary

Returns EnrichedSummary JSON for LLM synthesis

get_session_changes

Get file changes (created / modified / read)

get_session_requests

Get deduplicated user requests

get_session_todos

Get todo progress snapshots

get_session_errors

Get errors and issues with context

get_session_decisions

Get key decisions from thinking blocks

get_session_conversation

Get conversation history with role filter

get_git_logs

Collect git commit logs across projects

Process Lifecycle

The server exits automatically when the MCP stdio input closes, so old Claude Code sessions should not leave orphaned npm exec or node processes behind. For an extra safety net, set SESSION_INSIGHT_IDLE_TIMEOUT_MS to a positive number of milliseconds:

{
  "mcpServers": {
    "session-insight": {
      "command": "npx",
      "args": ["@morningljn/mcp-session-insight"],
      "env": {
        "SESSION_INSIGHT_IDLE_TIMEOUT_MS": "1800000"
      }
    }
  }
}

get_session_summary (EnrichedSummary)

Returns structured JSON instead of formatted text. The calling LLM reads the data and synthesizes a concise summary — zero extra API cost.

{
  "sessionDuration": "116min",
  "messageDensity": "low",
  "classifiedBash": [{ "cmd": "npm test", "category": "test" }],
  "errorsWithContext": [{ "message": "...", "trigger": "Bash", "relatedFile": "src/server.ts" }],
  "fileChangeGroups": [{ "directory": "src", "created": ["git.ts"], "modified": [] }],
  "dedupedRequests": ["refactor summary to structured JSON"],
  "decisions": ["use Jaccard trigram for dedup"],
  "toolStats": { "Bash": 93, "Read": 39, "Edit": 38 },
  "gitActions": ["git commit -m \"feat: ...\"", "git push origin main"]
}

get_git_logs

Collect git commit history across all discovered projects:

[
  {
    "project": "/Users/user/project",
    "projectName": "my-app",
    "commits": [
      { "hash": "a1b2c3d", "message": "feat: add auth", "author": "user", "date": "2026-05-20T10:00:00+08:00", "files": ["src/auth.ts"] }
    ]
  }
]

Architecture

┌───────────────────┐   stdio    ┌──────────────────┐   read     ┌──────────────────────────┐
│   MCP Client      │◄─────────►│ session-insight  │◄──────────►│ ~/.claude/projects/      │
│ Claude/OpenCode/  │   JSON    │     server       │            │ ~/.local/share/opencode/ │
│      Codex        │           │                  │            │ ~/.codex/sessions/       │
└───────────────────┘           └───────┬──────────┘            └──────────────────────────┘
                                        │
                                 ┌──────┴──────┐
                                 │ Provider    │
                                 │ Registry    │
                                 └──────┬──────┘
                                        │
                                 ┌──────┴──────┐
                                 │  Extractor  │   Git Log
                                 │  (summary,  │   Collector
                                 │   classify, │
                                 │   dedup,    │
                                 │   errors)   │
                                 └─────────────┘

Key design decisions:

  • Stateless — no app-owned database, no persistence, reads existing session stores on each request

  • Fixture-friendly providers — provider roots are configurable so tests do not scan real local history

  • LLM-friendly output — structured JSON that the calling LLM synthesizes into natural language

Development

npm install
npm test        # run tests with vitest
npm run build   # compile TypeScript
npm start       # start MCP server

License

MIT

Available Tools

11 tools
get_git_logsA

Collect git commit logs across projects. Returns structured JSON grouped by project. Only call this if the user explicitly asks for git logs or commit history.

Inputs: since, until, project, author.

get_session_changesA

Get file changes (created/modified) for a session. Only call this if the user explicitly asks for file changes.

Inputs: session_id (required).

get_session_conversationB

Get conversation messages for a session

Inputs: session_id (required), role, limit.

get_session_decisionsA

Get decisions for a session. Only call this if the user explicitly asks for decisions.

Inputs: session_id (required).

get_session_errorsA

Get errors/issues for a session. Only call this if the user explicitly asks for errors.

Inputs: session_id (required).

get_session_requestsA

Get deduplicated user requests for a session. Only call this if the user explicitly asks for user requests.

Inputs: session_id (required).

get_session_summaryA

Get a comprehensive summary for a session. Returns structured JSON data (EnrichedSummary). Based on this data, synthesize a concise Chinese summary for the user covering: what was done, key files changed, errors encountered, and decisions made. This is the SINGLE tool to call when the user wants to understand what happened in a session. Do NOT call other tools after this.

Inputs: session_id (required).

get_session_todosA

Get todo snapshots for a session. Only call this if the user explicitly asks for todo progress.

Inputs: session_id (required).

list_sessionsC

List all sessions, optionally filtered by project

Inputs: project, limit.

search_sessionsC

Search sessions by keyword

Inputs: keyword (required).

show_sessionA

Show metadata for a session (project, time, message count). Use this for a quick overview. For full content, use get_session_conversation or get_session_summary.

Inputs: session_id (required).

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

Loading tool schema changelog…

    TDQS

    A3.8/5.0

    Scored across 11 tools

    Disambiguation5/5

    Each tool targets a distinct aspect of sessions (git logs, changes, conversation, decisions, errors, requests, summary, todos, listing, searching, metadata). Descriptions include explicit guidance on when to use each, preventing confusion.

    Naming Consistency5/5

    All tools follow a consistent verb_noun pattern (e.g., get_git_logs, get_session_changes, list_sessions) using snake_case, with no deviations or mixed conventions.

    Tool Count5/5

    With 11 tools, the server thoroughly covers session insight without redundancy. Each tool serves a unique query, fitting the scope well.

    Completeness5/5

    The tool set covers all common retrieval needs for session analysis (metadata, conversation, changes, errors, decisions, etc.), with no obvious gaps for a read-only insight server.

    Maintenance

    ActivityInactive
    ResponsivenessOutdated data

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