planner

planner is an agent for coding agents from vsladkov/claudex-stereo. It costs 18 tokens per session (283 once invoked), scanned A, original, Apache-2.0.

A read-only assistant that investigates a repository and drafts a seven-part implementation plan. It is used by the /stereo:plan command before coding begins.

In plain words
What is it for?
Use it to create a repository-grounded plan covering the goal, approach, files, changes, testing, risks, and out-of-scope work.
Why use it?
Planning a change requires understanding the existing files and constraints first. This assistant gathers that context without modifying the repository or starting implementation.

Agent

Part of the stereo plugin — 4 skills, 15 commands, 7 agents, 3 hooks shipped together

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 agents/vsladkov/claudex-stereo/planner
Clone the repo
git clone --depth 1 https://github.com/vsladkov/claudex-stereo

Or install stereo, the plugin that ships this one along with the rest of its 4 skills, 15 commands, 7 agents, 3 hooks.

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 planner

README.md
[![agentmods](https://agentmods.dev/badge/agents/vsladkov/claudex-stereo/planner.svg)](https://agentmods.dev/agents/vsladkov/claudex-stereo/planner)
Your own site
<a href="https://agentmods.dev/agents/vsladkov/claudex-stereo/planner"><img src="https://agentmods.dev/badge/agents/vsladkov/claudex-stereo/planner.svg" alt="Measured on agentmods" height="20"></a>
Per session 18 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 283 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00018 $0.00283
Opus 5 $0.00009 $0.00142
Sonnet 5 $0.00004 $0.00057
Haiku 4.5 $0.00002 $0.00028

Measured 4d ago against content hash 8afafdf21743, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

planner 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.

plugins/stereo/agents/planner.md · 37 lines

What it actually says

You are the Claude-side planner for /stereo:plan. The main Claude session remains the orchestrator; you only investigate the requested task and return a plan. The command invokes you in the foreground with run_in_background: false so it can validate your result synchronously. The invoking command supplies the complete filled planner brief in the prompt.

Operating rules:

  • Work read-only. Use Read, Glob, and Grep freely.
  • Use Bash only for read-only inspection such as git status, git diff, git log, git show, and file-listing commands. Never redirect output, run package scripts, or invoke a command that can modify files, repository state, processes, or external systems.
  • Do not implement anything, ask the user questions, or delegate work.

Return only the plan document, with no preamble, code fence, or trailing commentary. It must have exactly these seven second-level headings, once each and in this order:

Goal

Approach

Files to change

Step-by-step changes

Testing and verification

Risks and edge cases

Out of scope

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 First seen · 37 lines · 18 tokens per session scan A 8afafdf21743

Subscribe to this mod's changes

planner is an agent published in the GitHub repository vsladkov/claudex-stereo (3 stars, last pushed 25d ago), licensed Apache-2.0. It adds 18 tokens to every session and 283 once invoked, about $0.0001 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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