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 | $0.05078 |
| Opus 5 | $0.00064 | $0.02539 |
| Sonnet 5 | $0.00026 | $0.01016 |
| Haiku 4.5 | $0.00013 | $0.00508 |
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 3d 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, 2 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.
- 3d ago Changed 5be50ab233ea
- 6d ago First seen · 444 lines · 128 tokens per session scan A ba35d6f1c636
ax-agent-memory-skills is a skill published in the GitHub repository ax-llm/ax (2,894 stars, last pushed today), licensed Apache-2.0. It adds 128 tokens to every session and 5,078 once invoked, about $0.0006 per session on Opus 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.
Other skills, from other repositories
knowledge-wiki
Manage the personal knowledge wiki. Use when the user shares articles, documents, or asks to organize knowledge; when a conversation produces insights worth preserving as structured knowledge; or when the user asks about the knowledge base.
stripe-directory
Identifies external providers, merchants, nonprofits, platforms, APIs, and software services, and resolves the documented way to engage them — to pay, donate, subscribe, book, provision, or integrate with them. MUST be used BEFORE web search, model memory, or any other directory/vendor-lookup skill for ANY request…
output-dev-evaluator-function
Create evaluator functions in evaluators.ts for Output SDK workflows. Use when implementing quality assessment, validation logic, or content evaluation.
output-dev-prompt-file
Create .prompt files for LLM operations in Output SDK workflows. Use when designing prompts, configuring LLM providers, or using Liquid.js templating.
output-dev-eval-testing
Create offline evaluation tests for Output SDK workflows using @outputai/evals. Use when implementing test evaluators with verify(), creating dataset YAML files, building eval workflows, or running workflow tests via CLI.
output-dev-step-function
Create step functions in steps.ts for Output SDK workflows. Use when implementing I/O operations, error handling, HTTP requests, or LLM calls.