ax-java-agent-memory-skills

ax-java-agent-memory-skills is a skill for Claude Code, Codex from ax-llm/ax. It costs 43 tokens per session (960 once invoked), scanned A, a copy of ax-cpp-agent-memory-skills, Apache-2.0.

A Java guide for using dev.axllm:ax to add memory and skill handling to agents. It covers recalling information, discovering skills, tracking loaded skills, and recording which skills were used.

In plain words
What is it for?
Use it when writing Java agents that load memories or skills, search catalogs, preload skills, or observe loaded and used skills.
Why use it?
It helps keep an agent's remembered information and available skills organized while avoiding Java code that relies on APIs from another language.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when writing Java agents that load memories or skills, search catalogs, preload skills, or observe loaded and used skills.

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Install with agentmods
npx agentmods add skills/ax-llm/ax/ax-java-agent-memory-skills
About the project

Ax is a TypeScript-first programming framework for building applications with large language models through typed generation, agents, workflows, and optimization tools. It is intended for developers who want one model for LLM programs across TypeScript, Python, Java, C++, Go, Rust, and other runtimes.

ax-llm/ax · 2,968 stars · on GitHub · axllm.dev

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.

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

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for ax-java-agent-memory-skills

README.md
[![agentmods](https://agentmods.dev/badge/skills/ax-llm/ax/ax-java-agent-memory-skills/github.svg)](https://agentmods.dev/skills/ax-llm/ax/ax-java-agent-memory-skills)
Your own site
<a href="https://agentmods.dev/skills/ax-llm/ax/ax-java-agent-memory-skills"><img src="https://agentmods.dev/badge/skills/ax-llm/ax/ax-java-agent-memory-skills/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for ax-java-agent-memory-skills

Your own site · 80×15
<a href="https://agentmods.dev/skills/ax-llm/ax/ax-java-agent-memory-skills"><img src="https://agentmods.dev/badge/skills/ax-llm/ax/ax-java-agent-memory-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 960 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00043 $0.00960
Opus 5.5 $0.00017 $0.00384
Sonnet 5.5 $0.00009 $0.00192
Haiku 4.5 $0.00004 $0.00096

Measured yesterday against content hash 057697f7f632, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ax-java-agent-memory-skills 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 yesterday.

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-agent-memory-skills — 30 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-memory-skills/SKILL.md · 64 lines

How it starts

The opening of the file, as written. The whole thing — 64 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AxAgent Memory And Skills 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

  • Load memories or skill guides into an RLM agent run.
  • Use static skillsCatalog or memoriesCatalog search without host callbacks.
  • Preload constructor or forward-time skills with deterministic id merging.
  • Track which memories or skills actually influenced a turn.
  • Register non-fatal loaded/used observers in native option maps or target callback wrappers.

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?"));

Lifecycle And State

  • Constructor skills seed the loaded-skill prompt without firing load observers.
  • Forward-time skills override constructor entries by normalized ID and remain loaded for later calls. IDs and names are trimmed, malformed entries are skipped, valid empty content is preserved, and rendered entries are ID-sorted.
  • A forward input named memories seeds the first actor turn. Recalled entries merge by ID for that run, then memory state resets before the next forward.
  • onSkillsSearch / onMemoriesSearch take precedence over static catalogs. Without a host callback, skillsCatalog / memoriesCatalog use the built-in deterministic lexical ranker.
  • onLoadedMemories / onLoadedSkills observe runtime recall and discovery, not constructor presets. onUsedMemories / onUsedSkills emit one consolidated notification per forward. Forward observers override constructor observers, and observer errors are ignored.
  • relevanceRanking produces advisory skill and memory hints using the same tokenization, weighting, tie suppression, limits, snippets, and already-loaded exclusion as TypeScript.
  • contextMap is TypeScript's context map: the distiller reads its text (TypeScript's section template when it has none), and after each completed run the context-map Distiller and Cartographer programs update it in place. Since 25.0.0 the text and item ids follow TypeScript's format ([rr-00002], a blank line before each section, a trailing newline); a map saved by a 24.x port loads with its items and is normalized by its next update.
  • getState() and setState(...) preserve the legacy bare-runtime snapshot shape. Use exportRuntimeState() and restoreRuntimeState(...) for the complete portable agent snapshot, including loaded skills and constructor-preset reapplication. Do not interchange the two shapes.

Read the full file on GitHub · 64 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. yesterday Changed 057697f7f632
  2. 2d ago Changed 6e1860d526bd
  3. 4d ago Changed 674f9a2159b7
  4. 5d ago Changed 5cde91916e0c
  5. 7d ago Changed c05786c5fdb5
  6. 9d ago Changed 0d760b48113b
  7. 11d ago Changed 48678e00f4ab
  8. 14d ago Changed 31f77693dfca
  9. 15d ago Changed 328143c52ccb
  10. 16d ago First seen · 64 lines · 43 tokens per session scan A 9c588ced31a3

Subscribe to this mod's changes

ax-java-agent-memory-skills is a skill published in the GitHub repository ax-llm/ax (2,968 stars, last pushed yesterday), licensed Apache-2.0. It adds 43 tokens to every session and 960 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 86% identical to ax-cpp-agent-memory-skills, differing in 30 lines, and is treated as a copy.

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