Stellar Agent v0.5.1

0.5.1

• Hardened Horizon-backed x402 verification so settled transactions must include a challenge memo bound to the issued resource and nonce, preventing reuse of older matching payments for fresh challenges.
• Normalized malformed x402 proof amounts to invalid_payment_proof responses so local paid API demos return HTTP 402 JSON errors instead of surfacing unhandled parser failures.
• Added safe demo bundle commands, typed SDK examples, agent payment recipes, approval bridge URL helpers, and config-file market alerts from the post-0.5.0 feature set.
• Published programmatic CLI JSON schemas for agent/tool integrations.
• Wrapped missing or malformed market alert config files as structured INVALID_INPUT responses with market-listener docs.

Artifacts

• npm package tarballs for every publishable @stellar-agent/* workspace package.
• Codex plugin artifact: stellar-agent-codex-plugin-v0.5.1.tgz.
• release-manifest.json with artifact SHA-256 checksums and source commit.

Verification

• pnpm release:preflight
• Fresh install from generated npm tarballs
• Bundled Codex plugin validation from the generated plugin tarball

Boundaries

• npm publication is queued through the separate protected Publish npm workflow and requires npm-production approval.
• Testnet remains the default.
• Mainnet local auto-signing and Mainnet secret-key storage remain blocked.