Add programmatic tool calling release post with MiniZinc case study

[r33drichards]

Tutorial and integration test demonstrating mcp-v8's programmatic tool calling feature using the MiniZinc constraint solver MCP server. Covers tool discovery (mcp.servers, mcp.listTools), constraint satisfaction (N-Queens, graph coloring), and optimization (knapsack) — all invoked from JavaScript inside the V8 sandbox via mcp.callTool().

https://claude.ai/code/session_01GZSn58VARmT7FtYkrstnxS

[github-actions]

MCP-V8 Load Test Benchmark Report

Comparison of single-node vs 3-node cluster at various request rates.

Results

Topology	Target Rate	Actual Iter/s	HTTP Req/s	Exec Avg (ms)	Exec p95 (ms)	Exec p99 (ms)	Success %	Dropped	Max VUs
cluster-stateful	100/s	45.8	1889	2022.27	5131.55	5154.56	70.8%	3027	100
cluster-stateful	200/s	48.6	3725.4	3858.97	5154.57	5186.16	39.9%	8838	200
cluster-stateless	1000/s	345.8	708.4	2700.41	10001.46	12936.42	61.7%	37823	1000
cluster-stateless	100/s	99.8	388.4	98.57	107.02	109.81	100%	2	12
cluster-stateless	200/s	199.5	785	102.05	109.87	115.29	100%	7	27
cluster-stateless	500/s	345.1	1391.3	1301.33	4595.85	7361.32	100%	8907	500
single-stateful	100/s	20.2	1879.9	4670.17	5119.89	5133.37	74.7%	4687	100
single-stateful	200/s	38.1	3749	4973.8	5132.6	5139.93	5.2%	9522	200
single-stateless	1000/s	122.3	240.5	7501.88	11615.11	15834.52	56.3%	51802	1000
single-stateless	100/s	99.6	416	117.87	164.5	214.8	100%	11	21
single-stateless	200/s	150.1	406.5	1107.35	2769.04	3782.51	100%	2859	200
single-stateless	500/s	105.6	284.4	4541.27	9936.39	13110.77	97.8%	23455	500

P95 Latency

Topology	Rate	P95 (ms)
cluster-stateful	100/s	5131.55	███████████████████████████
cluster-stateful	200/s	5154.57	███████████████████████████
cluster-stateless	100/s	107.02	███████████████
cluster-stateless	200/s	109.87	███████████████
cluster-stateless	500/s	4595.85	███████████████████████████
cluster-stateless	1000/s	10001.46	██████████████████████████████
single-stateful	100/s	5119.89	███████████████████████████
single-stateful	200/s	5132.6	███████████████████████████
single-stateless	100/s	164.5	████████████████
single-stateless	200/s	2769.04	█████████████████████████
single-stateless	500/s	9936.39	█████████████████████████████
single-stateless	1000/s	11615.11	██████████████████████████████

Notes

• Target Rate: The configured constant-arrival-rate (requests/second k6 attempts)
• Actual Iter/s: Achieved iterations per second (each iteration = 1 POST /api/exec)
• HTTP Req/s: Total HTTP requests per second (1 per iteration)
• Dropped: Iterations k6 couldn't schedule because VUs were exhausted (indicates server saturation)
• Topology: single = 1 MCP-V8 node; cluster = 3 MCP-V8 nodes with Raft