datamancy — the grimoire

A cryptographically verifiable static MCP. Latin-named defensive spells — each a SKILL.md an LLM subagent casts against a target, SHA-256 verified against an ECDSA P-256-signed manifest before it reaches a model.

Use it

Add to any MCP client (Claude Code, Cursor, …):

{ "mcpServers": { "datamancy": { "command": "npx", "args": ["-y", "datamancy"] } } }

Read it

• The grimoire index — the spell catalog, load first
• llms.txt — the agent map
• Agent Skills index — structured, each spell with its SHA-256
• Signed MCP manifest — the source of truth (signature)

Content integrity, not access control: the manifest is signed by a key held non-exportably in AWS KMS; the public key (fingerprint 09db7668…) is pinned in the npm package and cross-published at datamancer.dev. Tampered content is refused, never delivered.

Elsewhere

• datamancer.dev — the practitioner's identity card
• algebraic-intelligence.dev — the chronicle
• source