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  1. Home
  2. 🧠 Knowledge & Memory
  3. Memex
Memex logo
Health: ActiveRecent health check succeeded.Last checked 9/7/2026, 3:16:06 AM

Memex

User RatingsBe the first to rate and review this MCP server!
View Repository12 GitHub StarsTotal stargazers on GitHub for the source repository (12 stars).Visit Website

Provides a bitemporal knowledge graph of git repo modules, symbols, decisions, and problems for AI coding agents via MCP.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to CursorAdd to VS Code
Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ā–¾

Client Config & Setup

Choose your client or environment
Target File:~/Library/Application Support/Claude/claude_desktop_config.json
claude_desktop_config.json
{
  "mcpServers": {
    "stifler7-memex": {
      "command": "npx",
      "args": [
        "-y",
        "stifler-memex-mcp"
      ]
    }
  }
}

šŸ’” Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Install Tool Schemas (12) Directory Badge Claim listing Alternatives🧠 More in Knowledge & Memory

Overview

This server continuously monitors git repositories to build a temporal knowledge graph capturing modules, symbols, architectural decisions, and open problems. It stores this structured data in Neo4j with bitemporal validity windows and confidence scores that decay over time. The server exposes 14 MCP tools for AI coding agents to read and write knowledge, enabling persistent context across sessions and preventing redundant rediscovery of codebase facts. It supports integrations with agents like Claude Code, Cursor, Codex, and Gemini CLI.

Use cases

•Maintain persistent codebase context for AI coding agents across sessions
•Query recent architectural decisions and open problems in a repository
•Retrieve symbol-level call graphs and linked decisions before editing
•Record new decisions or problems discovered during AI-assisted coding
•Analyze repository structure and confidence decay of knowledge over time

Key features

•Bitemporal knowledge graph with created_at and expired_at timestamps
•Confidence scores on edges that decay with a two-regime half-life
•14 MCP tools including read, write, and analytic operations
•Integration with multiple AI coding agents via MCP over stdio or HTTP
•Automated extraction from git commits using tree-sitter and Gemini Flash
•Support for team deployments with authentication and access control

Capabilities & Tool Schemas (12) ~256 tokensApproximate context cost of this server’s tool schemas (~4 chars/token), before any tool is called. Actual usage depends on your client and model.Self-reported Self-reportedParsed from the repository README, not verified against a live server — may be incomplete or out of date.

Inspect callable tools, capabilities, and parameters exposed to AI agents by Memex.

get_project_context

Session start. Returns a cluster-level briefing under 1500 tokens regardless of repo size

get_symbol_context

Before editing a function or class. Returns callers, callees, linked decisions

get_recent_decisions

Last N days of architectural decisions, optionally module-scoped

get_open_problems

Active bugs and tech debt, sorted by severity

search_context

Hybrid search: semantic Ɨ keyword Ɨ graph traversal Ɨ RRF merge

get_stale_context

Edges whose composite confidence dropped below threshold

Documentation Overview

memex — trusted engineering context for agentic software engineering

A protocol-neutral engineering-context layer for AI coding agents. memex builds a bitemporal knowledge graph of your repository — modules, symbols, decisions, problems, evidence, and code evolution — and exposes bounded, provenance-aware context through Hermes MemoryProvider or MCP.

A daemon and MCP server that turns commits and file changes into structured engineering knowledge. Agents can receive relevant repository context before a task, with freshness and provenance preserved, without making memex a source of personal memory or raw session state.

PyPI PyPI downloads npm npm downloads Claude Code marketplace memex MCP server GitHub stars Tests CodeQL OpenSSF Scorecard License: MIT

memex — temporal knowledge graph MCP server for AI coding agents, built on Graphiti and Neo4j

mermaid
flowchart LR
    A[Your repository<br/>files + git] --> B[memex watcher<br/>tree-sitter + Gemini]
    B --> C[Neo4j graph<br/>bitemporal facts]
    C --> D[memex core<br/>ContextPacket selection]
    D --> E[Hermes MemoryProvider<br/>automatic read-only prefetch]
    D --> F[MCP fallback<br/>explicit lookup]
    E --> G[AI coding agent]
    F --> G

    style B fill:#cfe8ff,stroke:#0066cc,color:#000
    style C fill:#fff4cf,stroke:#cc9900,color:#000
    style E fill:#d4f5d4,stroke:#2d8f2d,color:#000

Install

Via Claude Code marketplace

Code
/plugin marketplace add STiFLeR7/claude-plugins
/plugin install memex-mcp@stifler-marketplace

Restart your Claude Code session.

Manual

Terminal
docker compose -f docker/docker-compose.yml up -d
cat > .env <<EOF
NEO4J_URI=bolt://localhost:7687
NEO4J_USER=neo4j
NEO4J_PASSWORD=memex-local
GEMINI_API_KEY=your-key-here
EOF
npx stifler-memex-mcp init --repo .
npx stifler-memex-mcp watch --repo .
npx stifler-memex-mcp serve --repo .

Hermes integration

The v0.9 Hermes integration is read-only. Hermes retains personal memory, raw session state, and execution state. memex supplies repository engineering context through a bounded ContextPacket; it does not ingest Hermes state.db, transcripts, prompts, or tool results.

Add the memex provider to Hermes' profile configuration:

yaml
memory:
  provider: memex
plugins:
  memex:
    repo_path: /absolute/path/to/repository
    prefetch_timeout_seconds: 7
    max_items: 8
    max_chars: 12000

If Hermes is not installed, use the same context selector through the MCP get_engineering_context tool. Both paths share the protocol-neutral memex core and fail open when retrieval is unavailable.

ChannelCommand
Claude Code marketplace/plugin install memex-mcp@stifler-marketplace
npx (no install)npx stifler-memex-mcp <cmd>
uvuv add memex-mcp
pippip install memex-mcp
sourcegit clone github.com/STiFLeR7/memex && uv sync

Self-hosted team deployment

For a shared team setup (one Neo4j + one memex-server, auth on by default, Neo4j's ports never exposed to the host):

bash
bash docker/bootstrap-team-env.sh
docker compose -f docker/docker-compose.team.yml up -d

See docker/TEAM-DEPLOY.md for the full flow, capturing the initial admin key, and the down -v footgun to avoid.

At a glance

PropertyValue
OutputA Neo4j graph populated continuously from your repo
StorageNeo4j via Graphiti. Bitemporal — every edge has created_at and optional expired_at
ContextBounded, ranked, provenance-aware ContextPacket
IntegrationsHermes MemoryProvider, MCP resources/tools, Claude Code, Cursor, Codex, Gemini CLI
Failure modeFail-open; agent execution continues without memex
GranularityScales from 50 to 5000+ modules via hierarchical Leiden clusters
SynthesisGemini Flash distills commits into Decision nodes; Pro for grounded synthesis
ConfidenceComputed at query time. Two-regime decay (validated half-life ~139d, unvalidated stale at 30d)
Write governancePer-node-type ACL, intent-confirmation on agent writes, explicit corroborates / supersedes semantics
Goal 10 evidence8/8 valid paired runs, 0 treatment failures, 0 treatment regressions

The lifecycle

mermaid
flowchart TD
    Init[memex init<br/>extract baseline] --> Watch[memex watch<br/>daemon + git hooks]
    Watch -->|commit| Extract[tree-sitter extract<br/>symbols, imports, lockfile]
    Extract --> Synth[Gemini Flash<br/>diff → Decision nodes]
    Synth --> Write[Graphiti add_episode<br/>+ post-hoc bitemporal SET]
    Write --> Decay[Scheduler<br/>nightly confidence decay]
    Decay -->|stale edges| Archive[expired_at = now]

    Serve[memex serve<br/>MCP stdio/HTTP] -.->|reads| Write
    Agent[AI agent] -->|14 MCP tools| Serve
    Serve -->|record_decision / record_problem| Write

    Cluster[memex cluster<br/>Leiden over hybrid edges] -.->|every N commits| Write

    style Init fill:#e8f4ff,color:#000
    style Watch fill:#fff4cf,color:#000
    style Synth fill:#ffe0cc,color:#000
    style Serve fill:#d4f5d4,color:#000

MCP tools

14 tools — eight read, four write, two analytic.

Read

ToolWhen
get_project_contextSession start. Returns a cluster-level briefing under 1500 tokens regardless of repo size
get_symbol_contextBefore editing a function or class. Returns callers, callees, linked decisions
get_recent_decisionsLast N days of architectural decisions, optionally module-scoped
get_open_problemsActive bugs and tech debt, sorted by severity
search_contextHybrid search: semantic Ɨ keyword Ɨ graph traversal Ɨ RRF merge
get_stale_contextEdges whose composite confidence dropped below threshold
explain_changeGiven a commit SHA, cross-references the diff with linked Decision/Problem nodes and asks Gemini Pro for a grounded explanation
predict_impactGiven a file path, returns a ranked list of modules likely affected based on graph coupling (no LLM call)

Write

ToolWhen
record_decisionAfter making a technical choice. Supports corroborates (reinforce) and supersedes (replace)
record_problemWhen discovering a bug or piece of tech debt
resolve_problemWhen a tracked problem is fixed
invalidate_edgeWhen a stored fact is no longer true

Bitemporal confidence

Confidence is not a stored number that mutates. It is computed at query time from base_confidence, validation status, time since last reinforcement, and access count.

mermaid
flowchart LR
    Edge[Edge created<br/>base_confidence] --> Q{Validated by<br/>a human?}
    Q -->|yes| Slow[Slow regime<br/>half-life ~139d]
    Q -->|no| Fast[Fast regime<br/>stale at exactly 30d]
    Slow --> Score[Composite score<br/>conf Ɨ recency Ɨ rehearsal]
    Fast --> Score
    Score -->|below floor| Stale[get_stale_context surfaces it]
    Score -->|access| Bump[last_reinforced_at updated]
    Bump --> Score

    style Slow fill:#d4f5d4,color:#000
    style Fast fill:#ffd4d4,color:#000
PropertyValue
Validated half-life~139 days
Unvalidated stale threshold30 days (composite < 0.3)
Recency τ90 days (exponential decay)
Composite formulaconf Ɨ recency Ɨ (1 + rehearsal_w Ɨ log(1 + access_count))
Conflict similarity threshold0.4 (below this + overlapping validity = conflict)
Intent-confirmation threshold0.85 (MCP write similarity check)

Hierarchical clusters

memex cluster runs hierarchical Leiden over a hybrid edge graph:

Edge typeWeight
Directory co-location1.0
Module imports2.0
Symbol callslog(1 + calls)
PropertyValue
Algorithmgraspologic.partition.hierarchical_leiden with fixed seed
NamingTF-IDF top-3 over module docstrings + symbol names, parent-dir fallback
ID pinningJaccard ≄ 0.5 across reruns (cluster names stay stable through renames)
User overrides.memex/clusters.yaml — any assignment can be locked
Context budgetget_project_context stays under 1500 tokens whether your repo has 50 or 5000 modules

Measure Your Savings

memex tracks token reduction metrics and human review actions locally in a SQLite database (~/.config/memex/telemetry.db).

You can query your savings at any time using the CLI:

bash
memex stats

Or view the raw JSON payload:

bash
memex stats --json

Read the full README →View source on GitHub →

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Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars
12
Stargazers on the source repository.
Last commit
4d ago
Most recent push to the default branch.
Tools exposed
12
Callable tools this server registers over MCP.
Directory activity
1 views
Config copies, upvotes, and views on AllMCPs.

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Memex

It extracts modules, symbols, architectural decisions, open problems, and lockfile facts from every commit and file change.

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Technical Specs & Signals

Category🧠Knowledge & Memory
More technical detailsExpand ā–¾
TransportSTDIO
RuntimeNode.js
Last updatedSep 7, 2026
9/10 checks healthy over the last 31d
Views1
Unique ViewsTotal visits recorded for this listing page on AllMCPs.
Installs0
Installs & Copy ActionsTotal times users copied install commands or configuration snippets for this server.
GitHub stars12
GitHub Star CountTotal stargazers on GitHub representing community popularity (12 stars).
Last commit4d ago
Last Repository CommitThe most recent commit or push recorded for this server's GitHub repository.Last commit on Sep 7, 2026
59Quality signal: Good Ā· 59/100How this signal is calculated ā–¾
Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20
Documentation & tools28/30
Adoption & activity6/15
Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

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Scanned 13d ago via OSV.dev Ā· stifler-memex-mcp (npm)

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