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-rust-agent-contextgit 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-rust-agent-context)<a href="https://agentmods.dev/skills/ax-llm/ax/ax-rust-agent-context"><img src="https://agentmods.dev/badge/skills/ax-llm/ax/ax-rust-agent-context/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-rust-agent-context"><img src="https://agentmods.dev/badge/skills/ax-llm/ax/ax-rust-agent-context.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 | $0.00043 | $0.00471 |
| Opus 5.5 | $0.00017 | $0.00188 |
| Sonnet 5.5 | $0.00009 | $0.00094 |
| Haiku 4.5 | $0.00004 | $0.00047 |
Grade A, and why
ax-rust-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 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.
This is a copy
69% identical to ax-cpp-playbook — 31 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.
What it actually says
AxAgent Context Selection For Rust
This skill helps an agent write Rust 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
- 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: Rust.
- Package:
axllm. - Package API docs:
API.mdandaxir-api.json. - Capability manifest:
axir-capabilities.json. - Runnable examples:
examples/. - Real network support: yes.
- Scripted no-key transport support: yes.
- Runtime profiles:
javascript-quickjs.
Core Pattern
let helper = axllm::agent("question:string -> answer:string")?;
let out = helper.forward(&llm, inputs, None)?;
Relevant API Surface
- Agents And RLM:
agent,AxAgent,AxAgent::with_child_agent,AxAgent::streaming_forward - Runtime Profiles:
ProcessCodeRuntime,RuntimeCapabilities,RuntimeEnvelope,javascript-quickjs - Optimizers:
optimize,playbook,AxPlaybook,AxBootstrapFewShot,AxGEPA,OptimizerEngine,OptimizerEvaluator
Guardrails
- Start from package examples for exact native syntax before inventing a new call shape.
- Use
provider-apiexamples only when the user explicitly has provider credentials available. - Use
no-keyexamples 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.
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 b1f4dee4714e
- 4d ago Changed 48ed546feb09
- 6d ago Changed 672ff9bb940d
- 7d ago Changed 72a3928aa25f
- 9d ago Changed 70378b2931ae
- 11d ago Changed c033a33fdb33
- 13d ago Changed b5b11c2f57f6
- 16d ago Changed 332635cb6222
- 17d ago Changed 1b18b3ee256c
- 18d ago First seen · 46 lines · 43 tokens per session scan A 72577ca1b531
ax-rust-agent-context is a skill published in the GitHub repository ax-llm/ax (2,969 stars, last pushed 4d ago), licensed Apache-2.0. It adds 43 tokens to every session and 471 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 69% identical to ax-cpp-playbook, differing in 31 lines, and is treated as a copy.
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