v0.1.0 — fail-closed x402 agent payment guard

Initial public release.

Packages

• @x402-guard/core — types, URL parsing, canonical JSON
• @x402-guard/policy — spend tracker, replay guard, policy engine
• @x402-guard/receipts — hash-chained audit ledger
• @x402-guard/middleware — X402Guard, withSpendingPolicy()
• middleware-go — Go reference for x402-go #26

Install from source

git clone https://github.com/prasanthkuna/x402-guard.git
cd x402-guard && npm install && npm run build

npm publish: add NPM_TOKEN secret then re-tag or run manual publish (see docs/PUBLISH.md).

Railguard v0.1 — x402-guard (pre-sign policy)

Railguard v0.1 — Policy-Enforced Agent Payments

This release demonstrates:

• pre-sign x402 policy enforcement
• atomic replay and budget authorization
• session-scoped on-chain execution proof
• CDP invoice payment state machine
• audit + reconciliation
• failure-mode remediation tests

Start here: https://github.com/prasanthkuna/railguard-new/blob/master/docs/PORTFOLIO.md

Sibling tags: railguard-new, x402-guard, railguard-cdp (all v0.1-reference)