ax-agent-context

ax-agent-context is a skill for Claude Code, Codex from dosco/aithy. It costs 147 tokens per session (857 once invoked), scanned A, a copy of ax-agent-context, Apache-2.0.

A guide for choosing among AxAgent's ways to manage information: recurring large collections, within-run history, evolving strategies, offline prompt tuning, and one-turn retrieval.

In plain words
What is it for?
Use it to choose between context maps, context policies, playbooks, GEPA optimization, and recall or skill retrieval for AxAgent work.
Why use it?
It helps match the context tool to the actual problem, so recurring data, run history, learned strategies, prompt tuning, and retrieved facts are handled separately.

Skill for Claude CodeCodex

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/dosco/aithy/ax-agent-context
Any agent
npx skills add dosco/aithy --skill ax-agent-context
Clone the repo
git clone --depth 1 https://github.com/dosco/aithy

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-agent-context

README.md
[![agentmods](https://agentmods.dev/badge/skills/dosco/aithy/ax-agent-context.svg)](https://agentmods.dev/skills/dosco/aithy/ax-agent-context)
Your own site
<a href="https://agentmods.dev/skills/dosco/aithy/ax-agent-context"><img src="https://agentmods.dev/badge/skills/dosco/aithy/ax-agent-context.svg" alt="Measured on agentmods" height="20"></a>
Per session 147 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 857 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 97% 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 $0.00147 $0.00857
Opus 5 $0.00073 $0.00428
Sonnet 5 $0.00029 $0.00171
Haiku 4.5 $0.00015 $0.00086

Measured today against content hash fe26462fe20a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ax-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

97% identical to ax-agent-context — 0 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.

.claude/skills/ax-agent-context/SKILL.md · 44 lines

How it starts

The opening of the file, as written. The whole thing — 44 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AxAgent Context Selection (@ax-llm/ax)

Use this skill to route a context-management need to the right AxAgent tool, then open the matching codegen skill. AxAgent manages four distinct context objects; choosing the wrong one is the usual mistake. Do not write tutorial prose; pick the tool and hand off.

Pick The Right Context Tool

Need Object Scope Use Next skill
Many tasks over the same large corpus (repo, doc set, dataset) Context map recurring corpus, persists across runs contextMap ax-agent-rlm
One long run whose own history must stay under control Trajectory compaction this run only contextPolicy: { preset, budget } ax-agent-rlm
Evolve task strategy from examples or live feedback Context playbook a stage, offline + online agent.playbook(...) ax-agent-optimize
Tune the prompt/instructions/demos offline Instruction text a program, offline agent.optimize(...) (GEPA) ax-agent-optimize
Pull task-relevant facts or guides for a turn Retrieval one turn recall(...) / skills ax-agent-memory-skills

Defaults

  • Recurring corpus + many different questions -> contextMap (persistent orientation cache).
  • One long multi-turn run with prompt pressure -> contextPolicy: { preset: 'checkpointed', budget: 'balanced' }; move to lean for very long runs with strong models, full for short tasks or weak models.
  • Evolve a context playbook -> agent.playbook(...) (offline from examples, or online from live feedback).
  • Tune instructions/demos offline -> agent.optimize(...) (GEPA).
  • Fetch facts or guides on demand -> recall(...) for memories, discover({ skills }) for skill guides.
  • A single oversized input value (a pasted doc, a big JSON blob) -> do nothing; autoUpgrade (ON by default) keeps it runtime-only with a prompt preview. Reach for contextFields only when you want a specific inline policy or the value is a large required non-string field. See ax-agent-rlm.

Read the full file on GitHub · 44 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. today Changed fe26462fe20a
  2. 4d ago First seen · 44 lines · 147 tokens per session scan A 754d00ece5ee

Subscribe to this mod's changes

ax-agent-context is a skill published in the GitHub repository dosco/aithy (107 stars, last pushed 3d ago), licensed Apache-2.0. It adds 147 tokens to every session and 857 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. It is 97% identical to ax-agent-context, differing in 0 lines, and is treated as a copy.