Testigo Recall

MCP server that exposes a pre-scanned codebase knowledge base to AI agents. Instead of reading source files directly, agents query pre-extracted facts about code behavior, design decisions, and assumptions — saving time and tokens.

Works with Claude Code, Cursor, Windsurf, and any MCP-compatible client.

Installation

pip install testigo-recall-mcp

Configuration

GitHub Releases (default)

Auto-downloads knowledge base .db files from a GitHub release:

{
  "mcpServers": {
    "testigo-recall": {
      "command": "testigo-recall-mcp",
      "env": {
        "TESTIGO_RECALL_REPO": "owner/repo",
        "GITHUB_TOKEN": "ghp_..."
      }
    }
  }
}

Azure Blob Storage

Downloads .db files from an Azure Blob Storage container. Auth uses your existing az login session — no secrets needed:

{
  "mcpServers": {
    "testigo-recall": {
      "command": "testigo-recall-mcp",
      "env": {
        "TESTIGO_RECALL_AZURE_URL": "https://account.blob.core.windows.net/container"
      }
    }
  }
}

Auth priority: SAS token > az login bearer token > public container.

Local files

Point directly at local .db files (useful for development/demos):

{
  "mcpServers": {
    "testigo-recall": {
      "command": "testigo-recall-mcp",
      "env": {
        "TESTIGO_RECALL_DB_PATH": "/path/to/knowledge.db"
      }
    }
  }
}

All backends can be combined — DBs are merged at startup.

Environment Variables

Variable	Description
TESTIGO_RECALL_REPO	GitHub repo(s), comma-separated (e.g. owner/repo). Auto-downloads from knowledge-base release tag.
TESTIGO_RECALL_AZURE_URL	Azure Blob Storage container URL(s), comma-separated.
TESTIGO_RECALL_AZURE_SAS	Optional SAS token for Azure (read+list). Not needed if az login is active.
TESTIGO_RECALL_DB_PATH	Local .db file path(s), comma-separated.
GITHUB_TOKEN	GitHub token for private repos. Public repos work without auth.

Tools

The server exposes 6 tools to AI agents:

search_codebase

Full-text search across the knowledge base. Returns facts ranked by relevance. Supports semicolon-separated multi-query batching (e.g. "auth login; session JWT; middleware").

• query — search keywords
• category — optional filter: behavior, design, or assumption
• min_confidence — confidence threshold 0.0-1.0
• limit — max results (default: 20)
• repo_name — optional filter to scope to one repository

get_module_facts

Deep dive into a specific module. Use search_codebase first to discover module IDs.

• module_id — e.g. SCAN:backend/app/api or PR-123

get_recent_changes

Most recently extracted facts across the codebase.

• category — optional filter
• limit — number of results (default: 10)

get_component_impact

Blast radius analysis — shows what depends on a component and what it depends on.

• component_name — file path or service name (e.g. api_service.py)

list_modules

Lists all scanned modules in the knowledge base. Call without arguments for a compact repo summary.

• repo_name — optional repository filter

get_repo_dependencies

Cross-repo dependency graph from package manifests (go.mod, package.json).

• repo_name — optional filter
• direction — outgoing, incoming, or both

How It Works

The knowledge base contains pre-extracted facts organized by category:

• behavior — what the code does (triggers, outcomes)
• design — how it's built (decisions, patterns, trade-offs)
• assumption — what it expects (invariants, prerequisites)

Facts come from two sources:

• SCAN facts (SCAN:module/path) — current state of a module, refreshed automatically
• PR facts (PR-123) — what a specific PR changed, preserved as history

The server uses SQLite with FTS5 full-text search for fast, relevance-ranked queries.

Multi-repo support

All backends support multiple repositories in a single MCP server instance. Each repo gets its own .db file, stored in a shared location (GitHub release, Azure container, or local directory). The server downloads all .db files and merges them into a unified knowledge base at startup.

knowledge-base/
  ├── frontend-app.db
  ├── backend-api.db
  ├── shared-lib.db
  └── infrastructure.db

Use list_modules() to see all available repos, and repo_name parameter on search_codebase to scope queries.