ax-python-flow

Guidance for writing Python programs with axllm, a package for connecting language-model tasks into flows, or ordered graphs of processing steps.

In plain words
What is it for?
Creating typed flows, nested workflows, program graphs, dynamic options, caching, and optimizer components in Python.
Why use it?
It helps keep each step’s inputs, outputs, state, caching, and errors organised when building multi-step programs.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/ax-llm/ax/ax-python-flow
Any agent
npx skills add ax-llm/ax --skill ax-python-flow
Clone the repo
git clone --depth 1 https://github.com/ax-llm/ax

Made for: Claude Code, Codex.

Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 954 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 86% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00035 $0.00954
Opus 5 $0.00017 $0.00477
Sonnet 5 $0.00007 $0.00191
Haiku 4.5 $0.00003 $0.00095

Measured 2d ago against content hash a91e28cef470, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ax-python-flow scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

86% identical to ax-cpp-flow — 85 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

packages/python/skills/ax-python-flow/SKILL.md · 112 lines

How it starts

The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AxFlow For Python

This skill helps an agent write Python code with the generated Ax package axllm. Use the generated package API, examples, and manifests; do not import TypeScript-only APIs unless you are editing the TypeScript package.

When To Use

  • Compose generators, agents, and nested flows into a workflow graph.
  • Reason about flow state, node inputs, returns, caching, and errors.
  • Use generated package examples for flow graphs and provider-backed flows.

Package Facts

  • Language: Python.
  • Package: axllm.
  • Package API docs: API.md and axir-api.json.
  • Capability manifest: axir-capabilities.json.
  • Runnable examples: examples/.
  • Real network support: yes.
  • Scripted no-key transport support: yes.
  • Runtime profiles: javascript-quickjs, python-pyodide.

Core Pattern

from axllm import ax, flow

draft = ax("topicText:string -> draftText:string")
wf = (
    flow({"id": "docs.coreFlow"})
    .execute("draft", draft, {"reads": ["topicText"], "writes": ["draftResult", "draftText"]})
    .returns({"draftText": "draftText"})
)

More Patterns

Typed programs

Build each flow node from its own input/output contract.

classifier = ax('requestText:string -> route:class "support, sales, engineering"')
responder = ax("requestText:string, route:string -> responseText:string")

Class decision

Declare reads and writes so the responder waits for the typed route.

branch_flow = (
    flow({"id": "docs.branchFlow"})
    .execute("classifier", classifier, {"reads": ["requestText"], "writes": ["classifierResult", "route"]})
    .execute("responder", responder, {"reads": ["requestText", "route"], "writes": ["responderResult", "responseText"]})
    .returns({"route": "route", "responseText": "responseText"})
)

Parallel fan-out and join

Independent reads let research and audience analysis share one planner group.

parallel_flow = (
    flow({"id": "docs.parallelFlow"})
    .execute("research", research, {"reads": ["topicText"], "writes": ["researchResult", "factList"]})
    .execute("audience", audience, {"reads": ["topicText"], "writes": ["audienceResult", "audienceAngle"]})
    .execute("join", join, {"reads": ["factList", "audienceAngle"], "writes": ["joinResult", "briefText"]})
    .returns({"briefText": "briefText"})
)

Read the full file on GitHub · 112 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 112 lines · 35 tokens per session scan A a91e28cef470

Subscribe to this mod's changes

ax-python-flow is a skill published in the GitHub repository ax-llm/ax (2,888 stars, last pushed 2d ago), licensed Apache-2.0. It adds 35 tokens to every session and 954 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to ax-cpp-flow, differing in 85 lines, and is treated as a copy.