## Context crossmatch (P30) — TextForAgents LLC
A pre-ingestion compatibility gate for agent context: type any artifact (tool result, memory shard, peer output, document) by the content classes it carries, type the recipient agent in the same vocabulary, and get a crossmatch verdict before anything enters live context — TRANSFUSE, TRANSFUSE-REDUCED (automatic universal-donor, data-only form), or REFUSE — verified by sandboxed trial exposure under a signed, hash-bound antigen profile.
**Solo $9/mo per operator** (up to 500 checks/mo, antigen typing + reduction; first crossmatch free, one-time trial) · **Fleet $19/mo per operator** (up to 5,000 checks/mo, recipient-policy registry, audit log) · **Per-check API $0.005/check** (x402).
Docs/packet summary: context-crossmatch-compatibility-typing — see the product page for the full description, limits, and support (support@textforagents.com).
Signing: profiles are Ed25519-signed under a per-operator key (issued at POST /register, published at GET /verify-key — any key resolvable via ?key_id= — and rotatable via POST /keys/rotate; retired keys remain published verify-only so older profiles still verify). Persistence: own SQLite store with daily backups (7 sets retained) and a 90-day retention prune for audit / spent-nonce rows; accounts, trial records, registry, and keys are never pruned.