What is ax-java-agent-context?

A Java guide for choosing how dev.axllm:ax agents handle context, which is the information supplied during a run. It distinguishes temporary run context, long-context policies, offline optimization, and memory recall.

Use it when writing Java agents that need context maps, context policies, ACE or GEPA optimization, long-context handling, or memory recall.

It helps prevent using the wrong mechanism for shortening a current run, improving prompts, or retrieving information from a persistent collection.

ax-java-agent-context — Skill by ax-llm

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-java-agent-context

Any agent

npx skills add ax-llm/ax --skill ax-java-agent-context

Clone the repo

git clone --depth 1 https://github.com/ax-llm/ax

Made for: Claude Code, Codex.

Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 490 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin 70% 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.

Model	Per session	Once invoked
Fable 5	$0.00045	$0.00490
Opus 5	$0.00023	$0.00245
Sonnet 5	$0.00009	$0.00098
Haiku 4.5	$0.00005	$0.00049

Measured today against content hash 960e64e589ca, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ax-java-agent-context 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 today.

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

70% identical to ax-cpp-refine — 29 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/java/skills/ax-java-agent-context/SKILL.md · 46 lines

What it actually says

AxAgent Context Selection For Java

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

When To Use

Choose between contextMap, contextPolicy, optimization, and recall for a task.
Avoid mixing persistent corpus orientation with within-run compaction.
Route long-context agent work to the right generated-package feature.

Package Facts

Language: Java.
Package: dev.axllm:ax.
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

AxAgent helper = Ax.agent("question:string -> answer:string", java.util.Map.of());
var out = helper.forward(llm, java.util.Map.of("question", "How should I proceed?"));

Relevant API Surface

Agents And RLM: Ax.agent, AxAgent
Runtime Profiles: ProcessCodeRuntime, RuntimeCapabilities, RuntimeEnvelope, javascript-quickjs, python-pyodide
Optimizers: Ax.optimize, Ax.playbook, AxPlaybook, AxBootstrapFewShot, AxGEPA, OptimizerEngine, OptimizerEvaluator

Guardrails

Start from package examples for exact native syntax before inventing a new call shape.
Use provider-api examples only when the user explicitly has provider credentials available.
Use no-key examples for deterministic local checks and provider request mapping.
Treat AxIR as the source of generated package truth: if package docs disagree with source code, update the compiler and regenerate packages.
Do not copy repo-maintainer skills from tools/*/skills/ into user packages.

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.

today Changed 960e64e589ca
2d ago First seen · 46 lines · 45 tokens per session scan A ce2febe70f08

Subscribe to this mod's changes

ax-java-agent-context is a skill published in the GitHub repository ax-llm/ax (2,890 stars, last pushed yesterday), licensed Apache-2.0. It adds 45 tokens to every session and 490 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 70% identical to ax-cpp-refine, differing in 29 lines, and is treated as a copy.

LLM Languages Memory and context Writing and docs ai cohere javascript openai typescript

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Format all code in the repository. Run before opening a PR or committing changes.

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ax-java-agent-context