What is kitaru-adapter-development?

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.

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.

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.

How zenml-io/kitaru configures Claude Code and Codex

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/zenml-io/kitaru/kitaru-adapter-development/github.svg)](https://agentmods.dev/skills/zenml-io/kitaru/kitaru-adapter-development)

Your own site

<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/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.

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 1,466 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.

Model	Per session	Once invoked
Fable 5.1	$0.00051	$0.01466
Opus 5.5	$0.00020	$0.00586
Sonnet 5.5	$0.00010	$0.00293
Haiku 4.5	$0.00005	$0.00147

Measured 8d ago against content hash 9355d7da64c4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 8d 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 · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 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 · 68 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.

8d ago Changed 9355d7da64c4
9d ago Changed cb790bdaf584
1mo ago Changed · +2 lines f2312e3b19c3
1mo ago Changed 719a976cfa6a
2mo ago Changed · +2 lines 64160ec49a50
2mo ago Changed cd6b0771f385
2mo 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 (317 stars, last pushed yesterday), licensed Apache-2.0. It adds 51 tokens to every session and 1,466 once invoked, about $0.0002 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 2026-08-30.

Building agents LLM MLOps ai-agents checkpoints durable-execution mcp

kitaru-adapter-development next to 6 skills from other repositories
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kitaru-adapter-developmentzenml-io/kitaru	Skill	317	yesterday	Apache-2.0	A	51	Claude Code, Codex
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headlessellmos-ai/skills	Skill	9	4d ago	MIT	A	72	Claude Code, Codex
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kitaru: Skill for Claude Code