Agentic Systems

Agentic Systems is a computational grammar for building intelligent systems whose behavior can be inspected, evaluated and moved across runtimes without losing its evidence.

It gives deterministic code and language-model reasoning one explicit Python model:

Tool -> Skill -> Agent -> System

The same System can use deterministic Python, OpenAI, a local Ollama model, AWS Bedrock Runtime or an OpenAI-compatible vLLM endpoint. Provider selection says where inference runs; Framework selection says who owns the Agent loop. Neither choice changes the application grammar.

Use Agentic Systems when a prototype must become a system you can explain, test, operate and evaluate repeatedly. It does not promise identical model wording, latency or vendor features. It promises one observable execution contract for answers, Tool evidence, usage, validation, errors and lineage.

Agentic Systems 2.1 keeps explicit traceability between its API, documentation, tutorials, and tests.

API -> Docs -> Tutorials -> explicit automated or manual evidence

Release certification is documented separately from teaching material and the Studio application. See Semantic certification and the focused semantic challenges. The narrative contract defines how every public surface must explain the same product without overstating its evidence.

Public concepts are defined in the API, explained in the documentation, taught through the canonical tutorials, and checked by explicit release gates.

Release status: 2.1.1 defines a canonical 5 Provider x 4 Framework registry, strict versioned schemas, normalized reasoning-safe results and polymorphic adapter contracts. Its public surface contains 89 stable top-level exports and 467 traced export/member IDs; all 2.0 serialization views remain compatible.

The certified release passed the 20-route primary Provider x Framework matrix and 76/76 primary semantic episodes across deterministic Python, OpenAI, Ollama, Bedrock API key and vLLM. The same checksum-verified wheel also passed Bedrock's four-framework AWS credential-chain matrix in AWS SageMaker and in the ADA enterprise sandbox: 28/28 certified routes and 108/108 reviewed semantic episodes in total. These are artifact-specific results, not a claim that every credential, endpoint or model is available in every environment.

Installation

Install the computational grammar from PyPI:

python -m pip install "agentic-systems==2.1.1"

OpenAI Agents is optional and uses a different distribution/import name:

python -m pip install "agentic-systems[openai-agents]==2.1.1"
# Dependency distribution: openai-agents; Python import: agents

For the complete portable Provider/Framework tutorial stack (excluding the platform-specific vLLM GPU server):

python -m pip install "agentic-systems[all]==2.1.1"

import agentic_systems as toolkit

The PyPI distribution contains the runtime, public API and CLI. Studio and its notebooks are a separate portable application so they can carry their own .env.example, tests and presentation dependencies without inflating the core wheel. Download agentic-systems-studio-2.1.1.zip from the matching GitHub release, then install its ui,notebook extras as described in the included README.

Install the Agentic Systems skill

The v2.1.1 GitHub release includes a credential-free skill ZIP whose archive root is agentic-systems/.

Expand-Archive .\agentic-systems-skill-2.1.1.zip `
  -DestinationPath "$env:USERPROFILE\.codex\skills" -Force

unzip agentic-systems-skill-2.1.1.zip -d ~/.codex/skills

Restart or reload Codex, then invoke $agentic-systems. OpenAI Skills upload surfaces that accept a ZIP can consume the same artifact. Download the standalone skill, conversational Studio and ADA offline bundle from the v2.1.1 release.

Release assets:

• agentic_systems-2.1.1-py3-none-any.whl: certified universal Python wheel.
• agentic_systems-2.1.1.tar.gz: matching source distribution.
• agentic-systems-skill-2.1.1.zip: Codex/OpenAI skill package.
• agentic-systems-studio-2.1.1.zip: one portable conversational Agentic System.
• agentic-systems-2.1.1-ada-offline.zip: wheel, Studio, tutorials and live evidence for restricted environments.
• agentic-systems-2.1.1-strands-protocol-challenge.zip: frozen MCP+A2A/LangGraph semantic gate for local, Colab, SageMaker and ADA execution.
• final-certification-summary.json: exact wheel identity and reviewed live evidence inventory.
• SHA256SUMS-2.1.1.txt: hashes for the Python and product artifacts.

For an installed-package smoke test and provider notebook setup, follow First Run Onboarding.

Why Agentic Systems

Agent prototypes usually break when they leave the demo path because the important questions are not represented in code:

• Which provider actually ran this workload?
• Which tools were available and which ones were called?
• What evidence supports the answer?
• Can the same behavior be evaluated again?
• Can the same Agent run with deterministic Python, OpenAI, Ollama, Bedrock or vLLM?
• Can deterministic tools and language-model reasoning share one execution contract?

Agentic Systems represents those concerns as a computational grammar: runtime, tools, contracts, result envelopes, lineage, environments, eval reports and human output are first-class concepts in the same API.

A Grammar You Can Execute

The grammar is not a diagram placed on top of another agent framework. Each concept is a public Python object with its own contracts, execution boundary and evidence.

Property	What the library provides
Modular	Tools, Skills, Agents, Systems, Graphs, Environments and Evals can be built, inspected and tested independently.
Composable	An Agent may own an internal pipeline; a System owns the external plan; a Graph makes state and routing explicit.
Portable	Provider and Framework are independent choices, so application composition is not coupled to one model vendor or orchestration SDK.
Integrable	Native, LangGraph, OpenAI Agents and Strands retain their real execution loops and advanced capabilities behind an explicit adapter boundary.
Observable	Every executable boundary returns normalized results, Tool evidence, usage when supplied by the SDK, validation, errors and lineage.
Evaluable	The same Agent or System can be exercised directly or through Environment episodes and deterministic or judge-backed Evals.
Extensible	Typed Tools, runtime Skills, execution plans and Framework kwargs add capability without inventing a second application model.

This creates a useful separation:

Stable application grammar
        -> choose where inference runs (Provider)
        -> choose who owns the loop (Framework)
        -> keep one observable result contract

Two Operating Patterns

The grammar supports two common operating patterns without splitting the application into unrelated implementations.

Fast path:
user -> online Agent -> live Tool/Agent collaboration -> answer

Deliberative path:
user -> client Agent -> offline System/Graph -> augmented evidence -> answer

The fast path favors an interactive response and may delegate through A2A. The deliberative path favors bounded processing, durable evidence and later reuse, and may expose capabilities through MCP. These are execution plans, not separate APIs: Tools, Skills, Agents, Systems, RunResult, lineage and evals keep the same meaning in both.

What You Can Build

Layer	What it gives you
Tools	Typed executable capabilities with structured results.
Skills	Packaged tools, instructions, contracts, assets and metadata.
Agents	Context transformed into actions through deterministic or LM-backed execution.
Systems	An application boundary for identities, runtime defaults, entrypoints, execution plans, inspection and hierarchical lineage.
Graphs	Portable-native or Framework-native state, nodes and edges for explicit routing and orchestration.
Environments	Episodic execution over records, transitions, rewards and history.
Evals	Repeatable validation cases with pass/fail reporting.
Lineage Memory	Human-readable explanation of what happened and why.
Integrations	Native, LangGraph, OpenAI Agents and Strands execution without rewriting the application grammar.

Core Model

The public model has two orthogonal dimensions:

Computation: Tool -> Skill -> Agent -> System
Time:        Environment -> Episode -> Step

A Graph can express a System's topology. Eval can measure an Agent or System directly, or observe it across Environment episodes. Runtime, Provider, Framework, contracts, lineage and human output remain transverse contracts; they support the grammar instead of becoming extra stages in it.

The grammar does not hide complexity. It gives each kind of complexity an explicit owner, so the resulting system remains inspectable and portable.

Runtime And Providers

Runtime and Scheduler solve two different parts of execution:

Runtime   -> where and through which Provider execution happens
Scheduler -> the operational budget allowed for that execution

Runtime + Scheduler = resolved route + bounded execution

The Runtime carries Provider selection, model, region, endpoint and Provider priority. Construction is declarative: it does not call a model. With provider="auto", resolution chooses one configured Provider and makes that choice inspectable before or in the resulting execution evidence.

The Scheduler carries operational limits shared by runtime adapters:

Limit	Meaning
timeout_s	Maximum wall-clock budget for a scheduled attempt.
max_retries	Number of retries permitted after a classified failure.
backoff_s	Delay between permitted retries.
max_turns	Upper bound for an Agent interaction loop.
max_tool_calls	Upper bound for Tool executions.
max_concurrency	Declared concurrency budget; synchronous local calls may still execute one at a time.

The Scheduler does not select a Provider, change the Agent's meaning or make a remote model deterministic. Agent behavior such as temperature, Tool choice, repair and strictness belongs to RunPolicy; business success belongs to Contracts and Evals.

Both objects are explicit and inspectable:

scheduler = toolkit.scheduler(
    timeout_s=30,
    max_retries=0,
    max_turns=4,
    max_tool_calls=2,
)
runtime = toolkit.runtime(provider="auto", scheduler=scheduler)

toolkit.show(runtime.describe())

Canonical providers:

Provider	Use
python-runtime	Local deterministic execution for tools, policies and smoke tests.
openai-runtime	Direct OpenAI model execution.
ollama-runtime	Local model execution through Ollama's OpenAI-compatible endpoint.
bedrock-runtime	AWS Bedrock Runtime through API-key or AWS credential-chain/IAM authentication.
vllm-runtime	An existing or explicitly managed OpenAI-compatible vLLM endpoint.

auto is a selection mode, not a sixth Provider. It resolves one configured Provider before execution and reports which route won and why. Readiness and certification remain distinct:

declared -> configured -> ready -> executed -> semantically certified

For a local Ollama route, install Ollama and the model outside Agentic Systems, then configure the endpoint and model in the nearest .env:

OLLAMA_BASE_URL=http://127.0.0.1:11434/v1
OLLAMA_MODEL=qwen3:4b-instruct-2507-q4_K_M
RUN_OLLAMA_LIVE=1

The model value is illustrative and must name a model already available to the configured Ollama server. Agentic Systems does not install Ollama, download the model or start that process.

For local/Colab GPU serving, 2.1 adds an explicit lifecycle boundary:

artifact = toolkit.model_artifact("unsloth/Qwen3-4B-Instruct-2507")
server = toolkit.model_server(artifact, profile="medium")
endpoint = server.start()       # explicit; construction never starts a process
runtime = server.runtime()      # vllm-runtime bound to the real endpoint/model
server.stop()                   # stops only the process owned by this object

The canonical walkthrough and four-Framework attestation are in tutorials/providers/03_vllm.ipynb.

Default provider="auto" priority is bedrock-runtime, then openai-runtime, vllm-runtime, and ollama-runtime. Override it with provider_priority=[...] or AGENTIC_SYSTEMS_PROVIDER_PRIORITY=.... Bedrock is considered configured only when both a region and an AWS authentication signal are present. That signal may be the standard AWS credential chain (signed with SigV4) or the native AWS_BEARER_TOKEN_BEDROCK API key; both use the same boto3 bedrock-runtime Provider and a region alone does not outrank another usable Provider.

Canonical framework facades:

Framework	Use
native	Agentic Systems' portable Agent loop and contract boundary.
langgraph	LangGraph graph orchestration.
openai-agents	OpenAI Agents Runner, native Tools, handoffs, guardrails, sessions and MCP.
strands	strands.Agent, native Tools/MCP, hooks and lifecycle.

Providers decide where inference runs. The selected Framework always owns its orchestration loop, and RunResult.meta["framework_adapter"] records the adapter that executed. Configuration details live in docs/ONBOARDING_FIRST_RUN.md and the layered tutorials/core, tutorials/providers and tutorials/frameworks paths.

From Zero-to-Hero

The examples are cumulative. Each step introduces one grammatical primitive, then reuses it in the layers that follow:

Computation: Tool -> Skill -> Agent -> System
Composition: Agent pipeline | System execution plan | Graph topology
Time:        Environment -> Episode -> Step
Evidence:    Eval observes Agent, System or Episode behavior

1. Deterministic Tool

Start with the smallest executable unit: one typed Tool.

The Tool owns an operation and its JSON-friendly contract. It is the source of truth for arithmetic, parsing, validation, policy enforcement and other work that should be explicit and repeatable. A Tool does not interpret a user request or own an execution loop; those responsibilities arrive with Agent.

validated input -> typed Tool -> structured evidence

import agentic_systems as toolkit

@toolkit.tool
def add(a: int, b: int) -> dict:
    """Add two integers."""
    return {"result": a + b}

add.check().raise_if_failed()
toolkit.show(add.info(), title="Tool contract")

The function remains ordinary Python, while the decorator adds a portable contract that Agents, Skills and Systems can inspect and execute.

API: Tools · Notebook: Core 01 - Tool

2. Runtime Skill

A Skill is the modularity boundary for a reusable capability. It packages Tools together with instructions, contracts, assets and metadata, so the same capability can travel across Agents, Systems, Providers and Frameworks without copying configuration.

Tool answers:  what can execute?
Skill answers: what belongs together and how should an Agent use it?

A Skill does not replace an Agent and does not reason by itself. It is a governed runtime module that an Agent consumes. Use a raw Tool when one function is enough; use a Skill when the capability needs shared instructions, multiple Tools, schemas, assets, provenance or policy.

calculator_skill = toolkit.skill(
    name="calculator",
    description="Verified arithmetic capabilities.",
    tools=[add],
    prompts={"instructions": "Use arithmetic tools as evidence."},
)

calculator_skill.check().raise_if_failed()
toolkit.show(calculator_skill.info(), title="Skill contract")

calculation = {"a": 20, "b": 22}
structured_request = {"tool": "add", "input": calculation}
natural_request = "Add 20 and 22 using the calculator Skill."

The rest of this walkthrough reuses calculator_skill; the capability is defined once and composed many times.

API: Skills · Notebook: Core 02 - Skills

3. Deterministic Agent

An Agent turns context into actions through an internal pipeline. Here, python-runtime executes the already-defined Skill without a language model, which makes this path fast, offline and repeatable.

structured input -> Agent -> Skill -> typed Tool -> normalized RunResult

calculator_agent = toolkit.agent(
    name="calculator",
    instructions=calculator_skill.instructions,
    skills=[calculator_skill],
    runtime=toolkit.runtime(provider="python-runtime"),
)

agent_pipeline = calculator_agent.pipeline(name="calculator_pipeline")
toolkit.show(agent_pipeline.inspect(), title="Deterministic Agent pipeline")

result = agent_pipeline.run(structured_request)
toolkit.human_result(result)

This first complete execution provides structured Tool events, validation, errors and human output. It deliberately does not ask a model to interpret natural language: correctness comes from executable code and explicit input.

API: Agent and Agent.pipeline · Notebook: Core 03 - Agent

4. Provider-Backed Agent

Now keep the Tool and Agent declaration while changing where interpretation and generation happen. A Provider-backed Agent can understand a natural language request, decide how to use the Tool and verbalize its evidence.

natural language -> Provider-backed Agent -> deterministic Tool -> final answer

This separation is fundamental: the model may reason about the request, but it does not become the source of truth for arithmetic or business rules. The Tool still produces the evidence. Moving from OpenAI to Ollama, Bedrock or vLLM changes the inference boundary, not the application grammar.

runtime = toolkit.runtime(provider="auto")
toolkit.show(runtime.describe(), title="Resolved Provider")

calculator_agent = toolkit.agent(
    name="calculator",
    instructions=calculator_skill.instructions,
    skills=[calculator_skill],
    runtime=runtime,
)

result = calculator_agent.run(natural_request)
toolkit.human_result(result, pretty=False, show_lineage=True)

provider="auto" resolves one configured Provider before execution and records the selected route. Production and certification flows can select a Provider explicitly when fallback or environmental ambiguity is unacceptable. This is the first step in the walkthrough that invokes a language model when auto resolves OpenAI, Ollama, Bedrock or vLLM; the preceding python-runtime execution is deliberately deterministic.

API: Runtime and Provider selection · OpenAI notebook · Ollama notebook · Bedrock notebook · vLLM notebook

5. System

A Tool exposes one capability. A Skill makes capabilities reusable. An Agent owns one computation pipeline. A System turns those parts into one inspectable application boundary.

The earlier examples can execute an Agent directly. Creating a System adds the properties an application needs as it grows:

• one place for Runtime and Framework defaults;
• scoped Tool, Skill and Agent registries with explicit conflict decisions and provenance;
• named entrypoints instead of executing every registered Agent;
• static inspection before any model or Tool is called;
• an internal pipeline for each Agent through agent.pipeline(...);
• an external execution plan through system.compile(execution=...), using a sequential, parallel or custom plan;
• hierarchical RunResult children and lineage across the composed execution.

Direct Agent:
input -> Agent pipeline -> RunResult

Composed System:
input -> System entrypoint -> Agent(s) -> Tool/Skill evidence
                         -> hierarchical RunResult

system = toolkit.system(runtime=runtime)
system.skill(calculator_skill)
calculator_agent = calculator_agent.bind(system)

inspection = system.inspect()
inspection.raise_if_errors()
toolkit.show(inspection.to_dict(), title="Static inspection")
print(inspection.human_text())

system_pipeline = system.compile(
    name="calculator_system_pipeline",
    entrypoint=calculator_agent,
)
toolkit.show(system_pipeline.inspect(), title="System execution plan")

result = system_pipeline.run(structured_request)
toolkit.human_result(result)

System and Graph are presented side by side because both are first-class composition surfaces, but they answer different questions:

System owns: identities + runtime + capabilities + execution boundary
Graph owns:  state + nodes + edges + routing topology

The two pipeline views are deliberately distinct:

Agent pipeline  -> internal stages owned by one Agent
System pipeline -> external execution plan across selected entrypoints

A System may use a Graph as its orchestration structure. The System remains the application boundary; the Graph remains the explicit route through that application.

API: System and static inspection · Notebook: Core 05 - System

6. Graph

Graphs coordinate state, nodes and edges. They do not replace Tools, Skills, Agents or Systems; they make routing and transition topology explicit.

Use a Graph when the route is part of the application contract: conditional branches, loops, fan-out/fan-in, shared state or dynamic Agent selection. For a simple ordered sequence, an Agent pipeline or System execution plan is usually the smaller abstraction.

System: composition and ownership
Graph:  state transitions and routing

toolkit.graph(engine="portable") creates the dependency-free Agentic Systems native Graph used below. engine="auto" may select native LangGraph when it is installed, while the public boundary continues to expose the chosen graph kind instead of hiding it. This is why Graph sits beside System in the API: System owns composition; Graph owns orchestration topology.

system.inspect() and graph.inspect() are parallel, non-executing views, not identical reports. System inspection validates registered identities, capabilities and contracts; Graph inspection exposes the selected boundary, native backend and available routing topology.

def graph_input(state):
    if "input" in state:
        return state["input"]
    return state["row"]["input"]

agent_step = toolkit.agent_node(
    calculator_agent,
    input=graph_input,
    output=lambda result, _state: {"result": result},
    trace=None,
)
graph = toolkit.graph(
    nodes={"agent_step": agent_step},
    edges=[("START", "agent_step"), ("agent_step", "END")],
    engine="portable",
    name="calculator_graph",
)

toolkit.show(graph.inspect(), title="Native Graph inspection")

state = {
    "input": structured_request,
    "history": [],
}

next_state = graph.run(state)
toolkit.show(next_state, title="Graph state")

API: native Graph and GraphApp.inspect · Notebook: Core 06 - Native Graph

7. Environment

Agent and System define computation. Graph makes routing topology explicit. Environment adds time.

An Environment supplies records, resets, steps, rewards and history. It turns the System's computation into Episodes that can be operated, observed, persisted and replayed under explicit conditions.

Time:       Environment -> Episode -> Step
Each Step:  System or Graph -> Agent -> Tool evidence
Capability: Skill supplies governed Tools and instructions to the Agent

Environment is not an Eval harness disguised as an abstraction. It is the runtime boundary for any application whose state evolves: conversations, queues, batch records, simulations, control loops and iterative workflows. An application may use an Environment in production without running an Eval at all; the same episode history can later become evaluation evidence.

The example continues with the same System, Agent, Skill and Graph. Nothing is redeclared merely to add time to the application.

records = [
    {"input": structured_request},
]

def reward_fn(state, row, action, env) -> float:
    return float(state["result"].ok)

environment = system.environment(
    records,
    graph=graph,
    reward_fn=reward_fn,
    name="calculator_environment",
)

observation, info = environment.reset(seed=0)
observation, reward, terminated, truncated, info = environment.step()

toolkit.show(toolkit.environment_summary(environment), title="Environment summary")

The reward reads the normalized RunResult produced by the Graph. It does not branch on dictionaries, SDK response classes or Provider-specific payloads. That is the role of the facade: the common path stays inside Agentic Systems, while native Framework objects remain available when an advanced application explicitly needs them.

The Environment owns episode progression, while the System still owns the application identities, capabilities and execution boundary. This separation lets either layer evolve without collapsing orchestration, state and evidence into one object.

API: Environment · Notebook: Core 07 - Environment and Eval

8. Evals

Eval adds empirical verification. It asks whether an Agent or System satisfies declared cases, whether execution happened directly or through recorded episodes. Environment is useful without Eval, and Eval is useful without Environment; combining them is a choice, not a requirement.

Agent/System/episode evidence -> deterministic expectations -> optional judge
                              -> evaluation report

Deterministic expectations remain authoritative. A judge can assess semantic quality, clarity or groundedness, but it cannot turn a deterministic failure into a pass. Use Evals to compare behavior across versions, Providers, Frameworks and release candidates without reducing success to ok=True.

cases = [
    {
        "name": "add_20_22",
        "input": structured_request,
        "expected": {
            "must_call": ["add"],
            "expected_tool_outputs": {"add": {"result": 42}},
        },
    }
]

report = system.eval(calculator_agent, cases)
toolkit.human_result(report)
report.raise_if_failed()

The report is evidence, not merely an ok=True flag: each case retains input, observed result, deterministic validation, score, optional judge evidence and execution lineage.

API: Evals · Notebook: Core 07 - Environment and Eval

9. Results, Lineage And Human Output

RunResult is the portability boundary of the library. Every executable boundary returns the same public envelope for answer, reusable data, Tool evidence, usage, validation and errors, even when the underlying Provider or Framework returns a different native object.

Provider/Framework-specific execution
        -> normalized RunResult
        -> human output + machine evidence + lineage

The normalized view does not fabricate parity. Usage fields remain absent when an SDK does not provide them, and native Framework results remain available for advanced inspection. Application code can consume the stable fields below.

result.final       # user-facing answer dictionary
result.data        # reusable evidence payload
result.text        # text fallback
result.tool_events # executed tool events
result.usage       # runtime usage metadata
result.validation  # contract validation
result.errors      # structured errors

Render one execution or a batch with human_result.

human_result is the readable projection of the evidence, not a replacement for the structured result. It keeps the selected Provider, Framework, model, usage, Tool calls, validation and final answer visible without exposing private reasoning.

toolkit.human_result(result, pretty=False, show_lineage=True)
toolkit.human_result([result_a, result_b], pretty=False)

Use output schemas when the expected response fields matter:

schema = toolkit.output_schema(["procedure", "final_result"])
answer = toolkit.final_answer(
    {"procedure": ["20 + 22"], "final_result": 42},
    schema=schema,
)

Lineage Memory explains what happened, how it happened and why the result is supported. For composed Systems it follows parent and child RunResult relationships, so orchestration does not erase the Agent or Tool that actually produced the evidence.

memory = result.lineage(
    name="calculator.run",
    question="What is 20 + 22?",
    goal="Explain the answer from tool evidence.",
)

toolkit.show(memory)
memory.to_prompt_context(max_chars=1200)

API: Results and Lineage Memory · Notebook: Core 04 - Results and Lineage

Integrations

Use integrations when an external framework should own orchestration while Agentic Systems keeps the same tools, runtime, contracts, lineage and human output conventions.

Three independent choices are easy to conflate:

Choice	Question it answers	Examples
Provider	Who performs model or deterministic execution?	openai-runtime, bedrock-runtime, ollama-runtime, vllm-runtime, python-runtime
Framework	Who owns the Agent loop and native lifecycle?	native, langgraph, openai-agents, strands
Graph	What application topology and state transitions should run?	nodes, edges, branches and routing declared with toolkit.graph(...)

Provider  -> who generates or executes
Framework -> who controls the Agent loop
Graph     -> what application topology runs

These axes compose; they are not aliases. provider="langgraph" is invalid because LangGraph is a Framework, while framework="openai-runtime" is invalid because OpenAI Runtime is a Provider. Choosing one does not silently choose the other.

This is not a lowest-common-denominator wrapper. The adapter boundary preserves the selected Framework's native object and accepts its explicit constructor and run kwargs. OpenAI Agents keeps handoffs, guardrails, sessions and MCP; Strands keeps Tools, MCP, hooks and A2A lifecycle; and the native Framework keeps the dependency-free portable path.

When an Agent selects framework="langgraph", Agentic Systems constructs a minimal one-node StateGraph so LangGraph genuinely owns that Agent invocation. It does not invent business routing. Declare a Graph explicitly with toolkit.graph(..., engine="langgraph") when nodes, branches and state transitions are part of the application contract.

Agent loop owner: native | LangGraph | OpenAI Agents | Strands
System:          composes one or more Agents and their execution plan

Each route
        -> explicit Provider
        -> normalized RunResult
        -> inspectable lineage

runtime = toolkit.runtime(provider="auto")

calculator_agent = toolkit.agent(
    name="calculator",
    instructions=calculator_skill.instructions,
    skills=[calculator_skill],
    runtime=runtime,
    framework="openai-agents",
)

result = calculator_agent.run(natural_request)
toolkit.human_result(result, show_lineage=True)

The same Agent can instead use LangGraph as its loop owner:

langgraph_agent = toolkit.agent(
    name="calculator",
    instructions=calculator_skill.instructions,
    skills=[calculator_skill],
    runtime=toolkit.runtime(provider="auto"),
    framework="langgraph",
)

result = langgraph_agent.run(natural_request)
toolkit.human_result(result, show_lineage=True)

That call creates the adapter Graph automatically. An explicit application Graph remains a separate design decision, demonstrated in Core 06 - Native Graph and the LangGraph notebook.

Integration-specific arguments stay owned by the selected framework. Agentic Systems keeps a thin facade; it does not reinterpret or hide framework-specific behavior.

LangGraph notebook · OpenAI Agents notebook · Strands notebook · Provider x Framework matrix

Studio reference application

Agentic Systems Studio is the installable conversational reference application. It lives under examples/ because it consumes the public grammar; Streamlit and ipywidgets are optional presentation dependencies, not core runtime dependencies. Direct notebooks, Streamlit and the Colab-native widget call the same System and return the same normalized RunResult.

Studio reads one canonical .env, discovers configured inference routes and lets the user choose a Provider and Framework for the current session. Managed credentials stay with the host. python-runtime is also available as an explicit deterministic Hello World control and is never presented as an LM.

python -m pip install -e .
python -m pip install -e examples/agentic_systems_studio[ui,notebook]
python -m streamlit run examples/agentic_systems_studio/app.py

OpenAI, Ollama and Bedrock need only their provider settings in .env or the managed environment. vLLM uses the same Studio contract after its OpenAI-compatible model server has started. Local, SageMaker and ADA use the Streamlit adapter; Colab uses the notebook-native adapter because its kernel proxy does not transport Streamlit's WebSocket. No public tunnel is created.

Tutorials

The canonical learning path is layered by responsibility:

Layer	Purpose	Default execution
tutorials/core	Agentic Systems grammar and composition	Python Runtime, Native Framework, portable Graph
tutorials/providers	Inference boundary	Explicit preflight; external execution when configured
tutorials/frameworks	Native orchestration SDK	Real SDK offline; Provider auto is optional
tutorials/api	Exact public contract	Generated manifest, documentation and pytest traceability

Provider notebooks use one public route and choose Run All:

Provider	Readiness inputs	Notebook
OpenAI	OPENAI_API_KEY; OPENAI_MODEL optional	tutorials/providers/01_openai.ipynb
vLLM	VLLM_BASE_URL and VLLM_MODEL	tutorials/providers/03_vllm.ipynb
Bedrock	Region plus SigV4 credentials or AWS_BEARER_TOKEN_BEDROCK	tutorials/providers/02_bedrock.ipynb
Ollama	OLLAMA_MODEL; OLLAMA_BASE_URL optional	tutorials/providers/04_ollama.ipynb

The Framework notebooks execute LangGraph, OpenAI Agents and Strands SDKs for real with python-runtime. The matrix notebook declares all 20 declared pairs and executes only the routes explicitly authorized by their RUN_*_LIVE gates; published semantic attestations remain the release evidence. Optional RUN_LIVE=1 changes only the Provider. RUN_LIVE=0 forces a fully offline validation.

The full ordered inventory contains 21 canonical Python notebooks and lives in tutorials/README.md. Studio is the single application example; there is no duplicated tutorial route.

Documentation

Use the documentation map to choose the user guide, conceptual model, API reference or current engineering contracts. Version history is recorded in the changelog; published artifact evidence belongs to GitHub Releases.

Quality Gate

Current verified status:

Version: 2.1.1
PyPI package: agentic-systems
Tests: run `python -m pytest` for the current count
Core coverage: 100.00%
Coverage scope: Bedrock facade and internal package excluded from core; separately gated at 100%
Canonical notebooks: 17 deterministic executed; 4 Provider notebooks execute their explicit not-run path offline

Run validation locally:

python -m pytest -q -W error::RuntimeWarning
python -m ruff check src tests
python -m pyright --project pyrightconfig.json
python scripts/check_pyright_baseline.py
lint-imports
python scripts/check_architecture.py
python scripts/check_secrets.py
python -m compileall -q src tests tutorials

The complete production, Pydantic and POO/polymorphism certification is documented in Triple Quality Gate.

For full coverage validation:

python -m pytest --cov=agentic_systems --cov-report=term-missing -q
python -m pytest tests/providers -q --cov-config=.coveragerc-bedrock --cov=agentic_systems.providers.bedrock_runtime --cov=agentic_systems.providers.bedrock --cov-report=term-missing

Design Principles

One public import.
Explicit runtime selection.
Provider and framework separation.
Typed tools and predictable payloads.
Stable result envelopes.
Contracts before hidden behavior.
Lineage before opaque answers.
Evaluation before claims.
Diagnostics without leaking secrets.
Tutorials as executable API documentation.

Contact

Author: Jacobo Gerardo Gonzalez Leon

E-Mail 1: jacobogerardo.gonzalez@bbva.com

E-Mail 2: jacoboggleon@gmail.com

LinkedIn: https://www.linkedin.com/in/jacoboggleon/

GitHub Repo: https://www.github.com/JacoboGGLeon/agentic_systems