ContextMesh — Intelligent Context Layer for Claude Code

One coding session. Infinite memory. Minimal active context.

ContextMesh sits between Claude Code and the model. It captures every event in your session, builds a structured knowledge graph of your work, and dynamically provides Claude with only the most relevant context for the current task — saving tokens, reducing cost, and preventing context overload.

How it works

Claude Code Hooks → ContextMesh Daemon → Session Graph + Repo Graph
                                               ↓
                              Context Router (multi-signal scoring)
                                               ↓
                              Claude Code ← MCP Server (get_context)
                                               ↓
                              Token Savings Tracker → Report

The key insight: semantic similarity alone fails for long coding sessions because everything related to the same feature looks similar. ContextMesh uses graph proximity + code dependency relationships + causal edges + recency + file overlap — not just vectors.

Installation

The easiest way to install ContextMesh globally is using pipx.

# 1. Install globally
pipx install claude-contextmesh

# 2. Register as a macOS background service (runs silently on boot)
contextmesh install-mac

Setup a new project

When you start working on a new repository, just run:

cd /path/to/your/project
contextmesh init

This instantly connects Claude Code to the MCP server, indexes your codebase for the repo graph, and configures the hooks.

Using ContextMesh

You have two options for running Claude Code with ContextMesh:

Option A: Standard usage

Just run claude normally. Claude will automatically query ContextMesh for relevant memory and codebase context using the MCP server.

Option B: Token Proxy mode (Recommended for Enterprise)

If you want to measure exact token savings and cost reductions on your Anthropic bill, use our wrapper command instead:

claude-mesh

(You can also run contextmesh proxy manually and set export ANTHROPIC_BASE_URL=http://127.0.0.1:8099 if you prefer not to use the wrapper).

View token savings

# Session summary
contextmesh stats --session YOUR_SESSION_ID

# Recent turns with savings breakdown
contextmesh turns --session YOUR_SESSION_ID --limit 20

# Global summary across all sessions
contextmesh stats

# If using proxy mode — actual API token counts
contextmesh stats --proxy

Token savings tracker

Every time Claude calls get_context(), ContextMesh records:

Architecture

Dual Graph

Session Graph — captures every meaningful event:

• User prompts, tool results, file reads/writes
• Decisions, bugs, solutions, errors, test results
• Typed edges: caused_by, solved_by, depends_on, same_task

Repo Graph — deterministic code relationships:

• Functions, classes, methods, files (Tree-sitter parsed)
• calls, imports, same_file, tested_by, inherits edges
• Updated incrementally on every file write

Hot / Warm / Cold Memory

HOT   → Current task context (always injected)
WARM  → Related tasks, decisions, nearby graph nodes (retrieved on demand)
COLD  → Full historical transcripts (never auto-injected)

Context Router

Before every get_context() call:

context_score =
    semantic_relevance   (embedding cosine similarity)
  + graph_proximity      (BFS distance in session graph)
  + file_overlap         (Jaccard similarity with current task files)
  + recency              (exponential decay from now)
  + causal_relevance     (DECISION/BUG/SOLUTION type bonus)
  + unresolved_bonus     (UNRESOLVED_ISSUE always surfaces)

Cache-aware assembly order

STATIC (cacheable)
─────────────────────────────
=== CURRENT TASK ===
[hot nodes — current thread]

=== RELEVANT DECISIONS ===
[top-scored decisions]

DYNAMIC
─────────────────────────────
=== RELATED CODE CONTEXT ===
[repo graph: functions/classes in touched files]

=== RECENT HISTORY ===
[recent warm nodes]

=== UNRESOLVED ISSUES ===
[always surfaced]

Configuration

.contextmesh/config.toml in your project (or ~/.contextmesh/config.toml globally):

[router]
default_budget_tokens = 15000

[tracker]
input_price_per_mtok = 3.0       # Claude Enterprise cached input price
uncached_price_per_mtok = 15.0

[embeddings]
model = "all-MiniLM-L6-v2"       # Local, no API key needed

[tasks]
topic_shift_threshold = 0.35     # Cosine distance to detect task switch

Development

pip install -e ".[dev]"
pytest tests/