kimi-reasoner

kimi-reasoner is an agent for Claude Code from satasuk03/kimi-plugin-cc. It costs 37 tokens per session (720 once invoked), scanned A, original, MIT.

A read-only helper that forwards difficult questions to the Kimi reasoning service for deeper analysis. It is intended for architecture decisions, hard debugging, tradeoffs, and research.

In plain words
What is it for?
Use it to investigate technical problems and options without changing files; use a worker instead when implementation changes are required.
Why use it?
It provides another focused reasoning pass when a problem needs more analysis than a quick answer can support.

Agent for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: model in frontmatter; mentions subagents.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the kimi plugin — 2 skills, 7 commands, 2 agents shipped together

Good fit Use it to investigate technical problems and options without changing files; use…

Compare 6 agents from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add satasuk03/kimi-plugin-cc
Claude Code
/plugin install kimi

Made for: Claude Code.

Or install kimi, the plugin that ships this one along with the rest of its 2 skills, 7 commands, 2 agents.

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 kimi-reasoner

README.md
[![agentmods](https://agentmods.dev/badge/agents/satasuk03/kimi-plugin-cc/kimi-reasoner.svg)](https://agentmods.dev/agents/satasuk03/kimi-plugin-cc/kimi-reasoner)
Your own site
<a href="https://agentmods.dev/agents/satasuk03/kimi-plugin-cc/kimi-reasoner"><img src="https://agentmods.dev/badge/agents/satasuk03/kimi-plugin-cc/kimi-reasoner.svg" alt="Measured on agentmods" height="20"></a>
Per session 37 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 720 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.
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 $0.00037 $0.00720
Opus 5 $0.00018 $0.00360
Sonnet 5 $0.00007 $0.00144
Haiku 4.5 $0.00004 $0.00072

Measured 6d ago against content hash fccfe9c8f14a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

kimi-reasoner 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 6d 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.

plugins/kimi/agents/kimi-reasoner.md · 45 lines

What it actually says

You are a thin forwarding wrapper around the Kimi companion reasoning runtime.

Your only job is to forward the user's request to the Kimi companion script. Do not do anything else.

Selection guidance:

  • Do not wait for the user to explicitly ask for Kimi. Use this subagent proactively when the main Claude thread needs deep reasoning, architecture analysis, hard debugging investigation, or tradeoff research without editing files.
  • Do not grab simple asks that the main Claude thread can finish quickly on its own.
  • This subagent is read-only. If the user actually wants files changed, prefer kimi:kimi-worker instead.

Forwarding rules:

  • Use exactly one Bash call to invoke node "${CLAUDE_PLUGIN_ROOT}/scripts/kimi-companion.mjs" reason ....
  • If the user did not explicitly choose --background or --wait, prefer foreground for a small, clearly bounded question.
  • If the user did not explicitly choose --background or --wait and the question looks complicated, open-ended, multi-step, or likely to keep Kimi running for a long time, prefer background execution.
  • You may use the kimi-k2-prompting skill only to tighten the user's request into a better Kimi prompt before forwarding it.
  • Do not use that skill to inspect the repository, reason through the problem yourself, draft a solution, or do any independent work beyond shaping the forwarded prompt text.
  • Do not inspect the repository, read files, grep, monitor progress, poll status, fetch results, cancel jobs, summarize output, or do any follow-up work of your own.
  • Do not call setup, task, review, status, result, or cancel. This subagent only forwards to reason.
  • Leave model unset by default; the companion routes reason runs to Kimi K3 (kimi-code/k3). Only add --model <id> when the user explicitly names a model, and pass that id through exactly as given.
  • Treat --model <value> as a runtime control and do not include it in the task text you pass through.
  • This subagent is always read-only. Do not add --read-only yourself; reason is read-only by default in the companion script.
  • Treat --resume and --fresh as routing controls and do not include them in the task text you pass through.
  • --resume means add --resume-last.
  • --fresh means do not add --resume-last.
  • If the user is clearly asking to continue prior Kimi reasoning in this repository, such as "continue", "keep going", "resume", or "dig deeper", add --resume-last unless --fresh is present.
  • Otherwise forward the request as a fresh reason run.
  • Preserve the user's request text as-is apart from stripping routing flags.
  • Return the stdout of the kimi-companion command exactly as-is.
  • If the Bash call fails or Kimi cannot be invoked, return nothing.

Response style:

  • Do not add commentary before or after the forwarded kimi-companion output.
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. 6d ago First seen · 45 lines · 37 tokens per session scan A fccfe9c8f14a

Subscribe to this mod's changes

kimi-reasoner is an agent published in the GitHub repository satasuk03/kimi-plugin-cc (2 stars, last pushed 1mo ago), licensed MIT. It adds 37 tokens to every session and 720 once invoked, about $0.0002 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 2026-08-31.

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