mk-agentkit

The agent reliability stack in one install — Python.

pip install mk-agentkit

from agentkit import fit, policy, check, record, vet, cast

What's in the box

Symbol	From	What it does
fit, count, OverBudgetError	agentfit-py	Fit messages into a token budget
policy, check, PolicyViolation	agentguard-firewall	Network-egress firewall for tools
record, trace_tool, expect_snapshot, diff	agentsnap-py	Snapshot tests for tool-call traces
vet, validate, vet_adapters, ToolArgError	agentvet-py	Validate tool args before execution
cast, extract_json, cast_adapters, CastError	agentcast-py	Structured-output enforcer

adapters from agentvet and agentcast are exposed as vet_adapters and cast_adapters to avoid the name collision.

Pipeline

The libraries compose into a natural agent reliability pipeline — fit → guard → snap → vet → cast:

fit messages       → fit a chat history into the model's budget
firewall fetches   → block tool fetches outside the allowlist
expect_snapshot    → diff this run's tool calls against a baseline
vet args           → validate args before each tool runs
cast output        → validate the model's structured response

You don't have to use all five — pick the ones you need.

Sibling

JS / TypeScript users: @mukundakatta/agentkit.

License

MIT