v0.15.0 - retry in mcp, and upgrade sse to native fastapi

[nirvanatikku]

v0.15.0 — Native FastAPI SSE & RFC-0010 Retry MCP Tools

Added

• RFC-0010 Retry Policy MCP Tools — 4 new MCP tools exposing retry policy management and failure recording to MCP clients:
  • openintent_set_retry_policy (admin) — Configure retry policy for an intent (strategy, max attempts, backoff delays, fallback agent)
  • openintent_get_retry_policy (read) — Retrieve the current retry policy for an intent
  • openintent_record_failure (write) — Record a failure event with RFC-0010 fields (agent_id, attempt_number, error_code, error_message, retry_scheduled_at)
  • openintent_get_failures (read) — Query failure history for an intent
• build_retry_failure_tools() — New helper in the Python MCP bridge (openintent.mcp) that registers all 4 retry/failure tools for MCPToolExporter, with ISO 8601 datetime conversion and proper delegation to the existing sync/async client methods
• MCP tool surface expanded from 66 to 70 tools; RBAC counts: reader=25, operator=43, admin=70

Changed

• Native FastAPI SSE — Replaced sse-starlette third-party dependency with FastAPI's built-in EventSourceResponse and ServerSentEvent (available since FastAPI 0.135.0). All four SSE subscription endpoints now use native async generator pattern with ServerSentEvent objects. Keep-alive pings use SSE comment format per spec.

Removed

• sse-starlette dependency — No longer required. Server extras now require fastapi>=0.135.0.

Updated

• All version references updated to 0.15.0 across Python SDK, MCP server package, and changelog
• FastAPI minimum version bumped from >=0.104.0 to >=0.135.0 in server extras
• Documentation updated: MCP guide, cost-retry guide, MCP server README, mkdocs home page, announcement bar

Files Changed

MCP Server (TypeScript)

• reference-implementation/mcp-server/src/tools.ts — 4 tool definitions + 4 dispatch handlers
• reference-implementation/mcp-server/src/client.ts — 4 new HTTP client methods
• reference-implementation/mcp-server/src/security.ts — 4 new RBAC tier entries
• reference-implementation/mcp-server/README.md — Updated RBAC table and tool categories

Python SDK

• reference-implementation/openintent/mcp.py — build_retry_failure_tools() function

Protocol Server (already implemented)

• server/routes.ts — Endpoints already existed (PUT/GET retry-policy, POST/GET failures)
• shared/schema.ts — Schema already existed (intentRetryPolicies, intentFailures)
• server/storage.ts — Storage methods already existed

Documentation

• reference-implementation/CHANGELOG.md
• reference-implementation/docs/changelog.md
• reference-implementation/docs/guide/mcp.md
• reference-implementation/docs/guide/cost-retry.md
• reference-implementation/docs/overrides/home.html
• reference-implementation/mkdocs.yml
• client/src/pages/changelog.tsx
• client/src/pages/docs.tsx