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3aKHP/prts-mcp

vts/v1.4.2 Bugfix

This release fixes issues for SREs watching stability and regressions.

Published 10d MCP Data & Storage
✓ No known CVEs patched
Read the diff → Tool health → What is this tool? →

✓ No known CVEs patched in this version

Topics

ai-agent anthropic arknights claude fanfiction game-data
+5 more
mcp mcp-server model-context-protocol prts prts-wiki

Affected surfaces

auth

Summary

AI summary

Session pool errors now return a spec‑compliant 404 with recovery handling for stale session IDs.

Changes in this release

Feature Medium

Extends default session idle timeout from 30 minutes to 24 hours.

Extends default session idle timeout from 30 minutes to 24 hours.

Source: llm_adapter@2026-05-25

Confidence: high

 —
Bugfix Medium

Returns 404 with LLM‑actionable message for stale session IDs instead of 400.

Returns 404 with LLM‑actionable message for stale session IDs instead of 400.

Source: llm_adapter@2026-05-25

Confidence: high

 —
Refactor Low

Relaxes MCP Streamable HTTP §3.2 to auto‑recover initialization on stale session ID.

Relaxes MCP Streamable HTTP §3.2 to auto‑recover initialization on stale session ID.

Source: granite4.1:30b@2026-05-25-audit

Confidence: high

 —
Full changelog

Fixed

  • Session pool 400 on stale session ID. When a client reuses a session ID
    that was evicted by idle timeout or lost across server restart, the server
    now returns a spec-compliant 404 (error code -32002) with an
    LLM-actionable message instead of the previous 400 "Server not initialized".
    Initialize requests with a stale session ID auto-recover (strip old ID,
    treat as fresh handshake) — an intentional relaxation of MCP Streamable
    HTTP §3.2 for clients that don't retry with a fresh handshake on error.

Changed

  • Session idle timeout default extended from 30 minutes to 24 hours,
    reducing the chance of session eviction during normal interactive use.
    Configurable via SESSION_IDLE_TIMEOUT_MS env var.
  • Session idle timeout test tightened to assert exact 404 status and
    error code, plus a new sub-test for init auto-recovery path.

Install

# Run directly (Streamable HTTP on :3000)
npx prts-mcp-ts

# Or install globally
npm install -g [email protected]

MCP endpoint: http://localhost:3000/mcp

View diff on GitHub

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About 3aKHP/prts-mcp

MCP Server for Arknights, querying the PRTS Wiki API and serving auto-synced operator archives and voice lines from game data. Designed for fan-creation (同人創作) AI agents. Python (stdio/Docker) and TypeScript (Streamable HTTP) implementations.

All releases →

Related context

Earlier breaking changes

  • vts/v1.0.0 Public tool surface frozen; 9 MCP tool names, parameters, and response formats locked.

Beta — feedback welcome: [email protected]