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.
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.
npx skills add ax-llm/ax --skill ax-agent-memory-skillsgit clone --depth 1 https://github.com/ax-llm/axWrote 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.
[](https://agentmods.dev/skills/ax-llm/ax/ax-agent-memory-skills)<a href="https://agentmods.dev/skills/ax-llm/ax/ax-agent-memory-skills"><img src="https://agentmods.dev/badge/skills/ax-llm/ax/ax-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.
<a href="https://agentmods.dev/skills/ax-llm/ax/ax-agent-memory-skills"><img src="https://agentmods.dev/badge/skills/ax-llm/ax/ax-agent-memory-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 5.1 | $0.00128 | $0.05117 |
| Opus 5.5 | $0.00051 | $0.02047 |
| Sonnet 5.5 | $0.00026 | $0.01023 |
| Haiku 4.5 | $0.00013 | $0.00512 |
Grade A, and why
ax-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 4d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- ax-agent-memory-skills — 97% identical, 4 lines differ
How it starts
The opening of the file, as written. The whole thing — 444 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AxAgent Memory And Skills Rules (@ax-llm/ax)
Use this skill when an agent needs a persistent context map, task-relevant memory retrieval, or skill guides loaded into the executor prompt on demand. For ordinary agent setup use ax-agent. For RLM runtime policy use ax-agent-rlm. For callbacks and telemetry use ax-agent-observability.
Use These Defaults
- Use a static
skillsCatalog/memoriesCatalogwhen the skill guides or memories fit in a plain array — Ax then backsdiscover({ skills })/recall(...)with a built-in deterministic local search and no host search code is needed. - Use
onSkillsSearch/onMemoriesSearchwhen retrieval needs a real backend (vector DB, BM25 service, KV). A host callback always takes precedence over the catalog's built-in search. - Use
contextMapwhen repeated runs inspect the same long external context and should accumulate a small orientation cache automatically. recall(...)is available to distiller and executor stages whenonMemoriesSearchor a non-emptymemoriesCatalogis set.discover({ skills })is available to the executor whenonSkillsSearchor a non-emptyskillsCatalogis set.- With
skillsCatalog, the executor prompt also gains a static### Available Skillsindex (id + name + description), so skill discovery is targeted instead of blind. - Both
recall(...)anddiscover({ skills })returnvoid. The loaded content appears on the next turn. - Use
onLoadedMemories/onLoadedSkillsto observe what got loaded. - Use
onUsedMemories/onUsedSkillsto track what the actor says it actually relied on. - Child agents do not inherit memory or skills search callbacks; wire them explicitly on every agent that needs the capability.
Context Map
Use contextMap when repeated runs ask different questions over the same long context, document set, or repository. The map is prompt-resident orientation knowledge: structure, concepts, constants, parsing schema, reusable aggregate results, and concrete error patterns. It is not a task-specific answer cache.
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.
- 4d ago Changed 1a0ed61297ce
- 5d ago Changed c9c6422fe7cb
- 7d ago Changed 891779d620ee
- 8d ago Changed 3dfc9494632e
- 10d ago Changed 65f0a8d850c5
- 12d ago Changed 070d58026f57
- 14d ago Changed 7951ad3026f6
- 17d ago Changed aede1ce859ed
- 18d ago Changed b2111b5e7396
- 19d ago First seen · 444 lines · 128 tokens per session scan A 2a631de30598
ax-agent-memory-skills is a skill published in the GitHub repository ax-llm/ax (2,969 stars, last pushed 5d ago), licensed Apache-2.0. It adds 128 tokens to every session and 5,117 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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