fix: compatibility with mcp>=2 / fastmcp>=3 (fixes #25)

[LelouchOTR]

What

Fixes #25 — the package crashes on startup with
ModuleNotFoundError: No module named 'mcp.server.fastmcp' when installed
via uvx against mcp>=2.0.0 (released 2026-07-28).

Why

mcp==2.0.0 removed the mcp.server.fastmcp submodule. The high-level
FastMCP decorator API (@mcp.tool(...)) was extracted out of mcp and
into the standalone fastmcp PyPI
package as of fastmcp 2.x. The repo's pyproject.toml accidentally
listed fastmcp as a dev extra only, so the runtime import had no
fallback on mcp>=2 — that is the actual root cause, not just a missing
upper bound.

Diff

minimax_mcp/server.py

-from mcp.server.fastmcp import FastMCP
+from fastmcp import FastMCP
@@
-fastmcp_log_level = os.getenv(ENV_FASTMCP_LOG_LEVEL) or "WARNING"
@@
-mcp = FastMCP("Minimax", log_level=fastmcp_log_level)
+mcp = FastMCP("Minimax")

pyproject.toml

 dependencies = [
-    "mcp[cli]>=1.6.0",
+    "mcp>=1.6.0",
+    "fastmcp>=3.0",
     "python-dotenv>=1.0.1",
     "requests>=2.31.0",
 ]

minimax_mcp/__init__.py bumps __version__ to 0.1.0.

Total: +6 / -7 across 3 files.

Verification

End-to-end against the live MiniMax API with a fresh uvx-resolved env:

• MCP initialize → server='Minimax' version='3.4.6' protocol='2025-11-25'
• tools/list → ['understand_image', 'web_search']
• web_search('MiniMax M3 model release date') → 9 organic results, base_resp.status_code=0
• understand_image('https://httpbin.org/image/png') → correctly described as "round, pink cartoon pig face"

Resolved env: mcp==1.29.0, fastmcp==3.4.6.

Pinning note

Pinning fastmcp>=3.0 raises the effective floor above what 0.0.4
required (fastmcp was a dev-only extra so effectively zero). This is
intentional: the alternative — keeping from mcp.server.fastmcp import FastMCP — is literally impossible, since that module was deleted in
mcp==2.0.0. If you'd prefer a lower floor, I can target
fastmcp>=2,<3 instead; that line still accepts the legacy
log_level= constructor kwarg, so server.py becomes a single-line
change and the dropped-kwarg part of the diff goes away.

Version bump is 0.0.4 → 0.1.0; happy to mark it 0.0.5 if you'd
prefer semver-strict.

---

Reported-by: @LelouchOTR
Tested-by: @LelouchOTR
Refs: #25

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