chore: release v0.10.0

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0.10.0 (2026-08-03)

Minor Changes

• Added a transport-neutral PaymentRuntime class that provides reusable primitives for matching payment challenges and creating credentials without depending on HTTPX. Refactored PaymentTransport and Client to accept either a methods list or a pre-built runtime instance, and consolidated the Method protocol into mpp.runtime. (by @parvahuja, #202)
• Add hint field to PaymentError problem details. PaymentRequiredError, MalformedCredentialError, and PaymentMethodUnsupportedError now include a default hint pointing users to wallet documentation. (by @parvahuja, #202)
• Improved HTTP challenge parsing to correctly split merged WWW-Authenticate headers with quoted commas, added pass-through support for streaming request bodies on ordinary and unrelated 402 responses, and introduced PaymentOutcomeUnknownError (consolidated from the MCP client into core) to surface explicit errors when a paid retry outcome is uncertain due to network failures or task cancellation. (by @parvahuja, #202)

Patch Changes

• Added Python 3.14 to the list of declared supported versions in package classifiers and added Python 3.11 to the CI test matrix. (by @parvahuja, #202)
• Preserved MCP challenge metadata when converting MCP challenges to core payment challenges. (by @parvahuja, #202)
• Prevent the optional MCP SDK from resolving to incompatible 2.x releases. (by @parvahuja, #202)
• Handle multipart (files=) and streaming bodies on paid 402 retry. Multipart bodies are buffered and replayed identically; async generator bodies raise PaymentError before any I/O. (by @parvahuja, #202)
• Preserve subscriptionId when parsing and formatting payment receipts. (by @parvahuja, #202)
• Fixed MCP payment error detection to support the current MCP SDK's McpError shape, where error code and data are nested under an error attribute rather than directly on the exception. Added helper functions _error_code and _error_data to extract these fields from both error shapes. (by @parvahuja, #202)