ciagent 0.3.1

Continuous Integration for AI Agents. Catch cost spikes and logic regressions before production.

AgentCI

Trace-based regression testing for AI agents. Catch semantic drift, tool call changes, and cost spikes before production.

You swap gpt-4o-mini for gpt-4o. Your support bot starts routing billing questions to the wrong agent. You change a retrieval prompt. Your RAG pipeline silently skips the vector search step. You don't find out until users complain.

AgentCI records what your agent actually did — every tool call, LLM invocation, routing decision, and cost — then diffs it against a known-good baseline. When something drifts, you see exactly what changed.

See It Work

# Run your agent's test suite — all green
$ pytest tests/ -v
======================== test session starts =========================
tests/test_routing.py::test_billing_routes_correctly       PASSED
tests/test_routing.py::test_refund_flow_tool_sequence      PASSED
tests/test_routing.py::test_cost_under_budget              PASSED
tests/test_rag.py::test_retrieval_step_executed            PASSED
tests/test_rag.py::test_no_hallucination                   PASSED
==================== 5 passed in 0.8s (mock mode) ====================

# Now change one line — swap the model
-  model = "gpt-4o-mini"
+  model = "gpt-4o"

# Run again — AgentCI catches the drift
$ pytest tests/test_regression.py -v
====================== AgentCI Diff Report =======================
⚠️  ROUTING_CHANGED  "I can't log in and I'm being charged"
   baseline → Account Agent
   current  → Billing Agent

⚠️  COST_SPIKE  "Can I get a refund?"
   baseline: $0.0004  →  current: $0.0025  (6.2x increase)

✅  TOOLS_IDENTICAL  [lookup_invoice, process_refund]
✅  OUTPUT_SIMILAR   cosine_similarity=0.94

SUMMARY: 1 routing change, 1 cost spike across 5 test cases
=================================================================

Quickstart

pip install ciagent
git clone https://github.com/agentci-org/DemoAgents.git
cd DemoAgents
make test

You'll see 90+ tests pass across three demo agents — RAG, DevOps, and customer support routing — in under 2 seconds with zero API keys required.

What It Catches

What went wrong	How you'd find out today	How AgentCI catches it
Model swap changes routing decisions	User complaints, days later	ROUTING_CHANGED diff with exact before/after agents
Prompt edit silently skips a tool call	Manual testing, maybe	TOOLS_CHANGED — "vector_search was called, now it's not"
New model costs 6x more per query	Surprise invoice at month-end	COST_SPIKE with threshold alerts and @assert_budget
RAG retriever returns irrelevant docs	Hallucinated answers in prod	LLM-as-judge assertions: assert_llm_judge("answer is relevant")
Guardrail stops firing after refactor	PII leaks through to specialist agent	guardrails_triggered trace assertions
Agent responds instead of routing	Support quality drops silently	assert_handoff_count(expected=1) catches the missing handoff

Works With Your Stack

AgentCI is framework-agnostic. Same assertions, same diff engine, same CLI — regardless of how you built your agent.

Framework	Integration	Demo
OpenAI Agents SDK	Native AgentCITraceProcessor — 2 lines to enable	Support Router — multi-agent handoff with guardrails
LangGraph / LangChain	ctx.attach_langgraph_state() captures conditional edges and tool calls	RAG Agent — retrieval + grading + generation pipeline
Anthropic (raw)	AnthropicMocker for zero-cost replay; native tool_use capture	DevAgent — 8-tool sequential repo analysis
Any Python agent	Manual Trace / Span construction for custom frameworks	See Core Concepts below

All three demo agents run with zero API keys using AgentCI's mock system.

Core Concepts

Trace & Assert

Every agent run produces a Trace — a structured record of LLM calls, tool invocations, handoffs, and guardrail checks.

from agentci.models import Trace

trace = run_your_agent("I was charged twice")

# What tools did the agent call?
assert "lookup_invoice" in trace.tool_call_sequence
assert "process_refund" in trace.tool_call_sequence

# Did it route correctly?
handoffs = trace.get_handoffs()
assert handoffs[0].to_agent == "Billing Agent"

# Did it stay under budget?
assert trace.total_cost_usd < 0.01

# Did guardrails fire when they should?
assert "pii_guardrail" not in trace.guardrails_triggered

Golden Baselines

Record a known-good trace. Diff future runs against it.

# Record a baseline
$ agentci record --test-name "billing_flow" --output golden/

# Later, after a change, diff against it
$ agentci diff --test-name "billing_flow"

# AgentCI reports:
#   TOOLS_CHANGED — vector_search was called, now it's not
#   COST_SPIKE — $0.0004 → $0.0025 (6.2x)
#   ROUTING_CHANGED — Account Agent → Billing Agent

Or use the pytest-native approach with assert_golden_match:

from agentci.assertions import assert_golden_match

def test_billing_regression():
    trace = run_your_agent("I was charged twice")
    assert_golden_match(trace, "golden/billing_flow.json")

Zero-Cost Testing

Mock LLM responses for deterministic, instant, free test runs.

from agentci.mocks import OpenAIMocker
from agents import set_default_openai_client

# Define a scripted sequence of tool calls + final response
mocker = OpenAIMocker([
    {"tool": "transfer_to_BillingAgent", "arguments": {}},
    {"tool": "lookup_invoice", "arguments": {"email": "[e-mail]"}},
    {"text": "I found your invoice. The duplicate charge has been refunded."}
])

# Inject into the OpenAI Agents SDK — no API key needed
set_default_openai_client(mocker.client)

trace = run_your_agent("I was charged twice")
assert trace.tool_call_sequence == ["transfer_to_BillingAgent", "lookup_invoice"]

Works the same for Anthropic:

from agentci.mocks import AnthropicMocker

mocker = AnthropicMocker([
    {"tool": "search_knowledge_base", "arguments": {"query": "billing"}},
    {"text": "Here's what I found about billing..."}
])

Try Breaking It

Clone the DemoAgents repo and try these:

Break 1: Remove a specialist agent. In examples/support-router/support_router/agents/triage.py, remove account_agent from the handoffs list. Run pytest tests/test_routing.py. Watch 6 tests fail with: ROUTING_CHANGED: Expected 'Account Agent', got 'General Agent'.

Break 2: Disable retrieval guardrails. In examples/support-router/support_router/agents/triage.py, remove the input_guardrails list. Run pytest tests/test_guardrails.py. Watch test_off_topic_blocked fail: Expected guardrail 'relevance_guardrail' to trigger, but no guardrails fired.

Break 3: Inject bad context. In examples/rag-agent/agent.py, modify the system prompt to remove the "only answer from context" instruction. Run pytest tests/test_rag.py. Watch the LLM-as-judge assertion catch the hallucination: FAILED — Agent used pre-trained knowledge instead of declining.

CLI

agentci init         # Generate CI config (GitHub Actions + pre-push hooks)
agentci run          # Run all tests (pytest-compatible)
agentci record       # Record golden baseline traces
agentci diff         # Diff current run against baseline
agentci report       # Generate HTML report from results

CI/CD

agentci init

Generates a GitHub Actions workflow and optional pre-push git hook. Every push runs your agent tests and diffs against golden baselines.

# .github/workflows/agentci.yml (auto-generated)
name: AgentCI
on: [push, pull_request]
jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: "3.10"
      - run: pip install -e ".[all]"
      - run: pytest tests/ -v
      - run: agentci diff --baseline golden/

For Coding Agents

If you're a coding agent (Claude Code, Cursor, Codex, Copilot) integrating AgentCI into a project, see AGENTS.md for structured setup instructions, import patterns, and the full assertion API reference.

Quick setup for any agent project:

1. pip install ciagent
2. Copy the test template from AGENTS.md
3. Run agentci init to generate CI config
4. Run agentci run to execute tests

Assertions

Assertion	What it checks
trace.tool_call_sequence	Ordered list of tool names invoked during the run
trace.total_cost_usd	Total LLM cost in USD
trace.get_handoffs()	List of agent-to-agent routing decisions
trace.guardrails_triggered	Which safety guardrails fired
trace.agents_involved	Ordered list of agent names that executed
assert_golden_match(trace, path)	Diff against a saved golden baseline
evaluate_assertion(type="llm_judge")	LLM-as-judge evaluation of output quality
evaluate_assertion(type="handoff_target")	Verify routing destination
evaluate_assertion(type="handoff_count")	Verify number of handoffs
@assert_budget(max_cost=0.10)	Decorator: fail if run exceeds cost limit
evaluate_assertion(type="tool_called")	Verify a specific tool was invoked
evaluate_assertion(type="output_contains")	Check output includes expected content
evaluate_assertion(type="cost_under")	Check total cost below threshold

Diff Report Types

When you diff a current run against a golden baseline, AgentCI flags these change categories:

Diff Type	Meaning
TOOLS_CHANGED	Different tools were called vs. baseline
ARGS_CHANGED	Same tools, but arguments changed
SEQUENCE_CHANGED	Tools called in a different order
COST_SPIKE	Cost increased beyond threshold
LATENCY_SPIKE	Duration increased beyond threshold
STOP_REASON_CHANGED	LLM stopped for a different reason
ROUTING_CHANGED	Agent handoff went to a different target
GUARDRAILS_CHANGED	Different guardrails fired vs. baseline
OUTPUT_CHANGED	Final output semantically different
AVAILABLE_HANDOFFS_CHANGED	Set of reachable agents changed

Status

AgentCI is in early release (v0.1.x). The core trace model, diffing engine, assertion library, mock system, and CLI are stable. The API may evolve based on community feedback.

What's here today:

• Trace capture for LangGraph, Anthropic, and OpenAI Agents SDK
• Golden baseline recording and regression diffing
• LLM mocking for all three frameworks (zero API keys)
• LLM-as-judge assertions for subjective output grading
• Pytest plugin for native integration
• GitHub Actions generator via agentci init

What's next:

• Dashboard UI for trace visualization
• Trace export (OpenTelemetry format)
• More framework adapters (CrewAI, AutoGen)
• MCP server for native coding agent integration
• Agent Skills distribution for auto-discovery
• Hosted regression tracking

Contributing

AgentCI is open source under the Apache 2.0 License. Issues, PRs, and feedback welcome.

If you build an agent and test it with AgentCI, I'd love to hear about it — open an issue or reach out.