kitaru: Skill for Claude Code

.agents/skills/kitaru-adapter-development/SKILL.md

kitaru-adapter-development is a skill for Claude Code, Codex from zenml-io/kitaru. It costs 51 tokens per session (1,115 once invoked), scanned A, original, Apache-2.0.

A development guide for adding or changing Kitaru framework adapters that record agent runs or support limited replay. An adapter connects Kitaru to a particular agent framework's public hooks and events.

In plain words
What is it for?
Use it when developing Kitaru adapters in the plugins/packages or packages directories, including work involving model calls, tools, child agents, failures, streaming, approvals, or resumed runs.
Why use it?
It helps developers choose the correct framework extension point and define what can be recorded or replayed before changing code. It also separates the repository and release requirements for Python and TypeScript adapters.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents); mentions AGENTS.md.

This is zenml-io/kitaru's own configuration. It tells Claude Code and Codex how to work on kitaru itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything kitaru configures →

Reuse

Borrowing it

Nothing to install: this file belongs to zenml-io/kitaru. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/zenml-io/kitaru/develop/.agents/skills/kitaru-adapter-development/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/zenml-io/kitaru

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.

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README.md
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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.

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Your own site · 80×15
<a href="https://agentmods.dev/skills/zenml-io/kitaru/kitaru-adapter-development"><img src="https://agentmods.dev/badge/skills/zenml-io/kitaru/kitaru-adapter-development.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,115 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found 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 $0.00051 $0.01115
Opus 5 $0.00026 $0.00558
Sonnet 5 $0.00010 $0.00223
Haiku 4.5 $0.00005 $0.00112

Measured 4d ago against content hash 64160ec49a50, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

kitaru-adapter-development 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.

.agents/skills/kitaru-adapter-development/SKILL.md · 66 lines

How it starts

The opening of the file, as written. The whole thing — 66 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Kitaru Adapter Development

Read AGENTS.md. For Python adapters, also read plugins/AGENTS.md and plugins/DEVELOPMENT.md. For TypeScript adapters, read release/typescript.md before changing package or release metadata. Load the same-name kitaru-dev repo skill for the current host for the general command and PR workflow.

Start from the closest current adapter and the target framework's public API. Do not port a historical adapter wholesale.

Choose the extension point

Recording adapters are independent Python distributions under plugins/packages/<slug>/, with focused tests under plugins/tests/adapters/<slug>/. Importer-backed adapters are different: they live inside the provider's importer package as an ImporterBackedAdapter subclass, never intercept model or tool calls, and follow the kitaru-importer-development skill instead of this section's package rules. Agent versions running them declare runtime_capabilities with overrides: false and tool_policies: false on the run spec. TypeScript framework adapters are packages such as packages/mastra/ and packages/vercel-ai/; shared adapter primitives live under packages/core/src/adapter/.

Before editing, state:

  • which public framework call, hook, callback, or wrapper is intercepted
  • which model, tool, handoff, child-agent, and failure events are observable there
  • when sessions and nodes are written, including what the caller observes if recording fails
  • which replay overrides can be applied at a real framework boundary
  • which streaming, tool, approval, resume, stateful, or dynamic cases remain unsupported

Preserve the framework's ordinary behavior, configured hooks and state, public entrypoint, and native result type. Reject unsupported replay configurations before model or tool execution. Treat passthrough tools as real side effects, not as a reversible transaction. If the framework has no public per-run model replacement point, do not emulate one by mutating shared agent state or reading private fields; stop and report that replay boundary.

Read the full file on GitHub · 66 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. 4d ago Changed · +2 lines 64160ec49a50
  2. 5d ago Changed cd6b0771f385
  3. 9d ago First seen · 64 lines · 51 tokens per session scan A 6e0db29b5d6c

Subscribe to this mod's changes

kitaru-adapter-development is a skill published in the GitHub repository zenml-io/kitaru (282 stars, last pushed today), licensed Apache-2.0. It adds 51 tokens to every session and 1,115 once invoked, about $0.0003 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 2026-08-30.

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