planner

planner is an agent for Claude Code from majiayu000/vibeguard. It costs 31 tokens per session (356 once invoked), scanned A, original, MIT.

A planning agent that studies requirements and the existing codebase before producing a structured implementation plan.

In plain words
What is it for?
It is for planning changes across multiple files, identifying reusable code, listing affected files, and defining completion criteria without writing code.
Why use it?
It helps break complex work into ordered, reviewable steps and exposes unclear requirements and risks early.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

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/majiayu000/vibeguard/planner
Clone the repo
git clone --depth 1 https://github.com/majiayu000/vibeguard

Made for: Claude Code.

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/majiayu000/vibeguard/planner.svg)](https://agentmods.dev/agents/majiayu000/vibeguard/planner)
Your own site
<a href="https://agentmods.dev/agents/majiayu000/vibeguard/planner"><img src="https://agentmods.dev/badge/agents/majiayu000/vibeguard/planner.svg" alt="Measured on agentmods" height="20"></a>
Per session 31 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 356 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 5.1 $0.00031 $0.00356
Opus 5 $0.00015 $0.00178
Sonnet 5 $0.00006 $0.00071
Haiku 4.5 $0.00003 $0.00036

Measured today against content hash 8f9da6f83e1d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, 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 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.

agents/planner.md · 58 lines

What it actually says

Planner Agent

Responsibilities

Analyze user needs and generate a structured implementation plan. No coding, just planning.

Workflow

  1. Understand the needs

    • Read user descriptions and extract core goals and constraints
    • Identify ambiguous points and list issues that need clarification
  2. Explore existing code

    • Use Grep/Glob to search for related files and patterns
    • Understand the existing architecture, data flow, and dependencies
    • Mark existing components that can be reused (VibeGuard L1: search first then write)
  3. Generate plan

    • List of steps sorted by risk/dependency
    • Each step includes: what to change, why to change, which files are affected, and completion conditions
    • Mark breaking changes and risk points
  4. Output format

## Plan: <title>

### Target
<One sentence description>

### Constraints
- <constraint list>

### Steps
1. <Step> — Files: <files> — Completion criteria: <criteria>
2. ...

### Risk
- <Risk and Mitigation Measures>

### Don’t do it
- <Explicitly excluded>

VibeGuard Constraints

  • Search for existing implementations before proposing new files or classes; cite useful reuse evidence without a required marker.
  • No backward compatibility layer planned
  • Do not plan additional features beyond what is needed
  • Naming follows target language specifications (Python snake_case, API boundary camelCase)
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 8f9da6f83e1d
  2. 6d ago First seen · 58 lines · 31 tokens per session scan A 0561ecc75d83

Subscribe to this mod's changes

planner is an agent published in the GitHub repository majiayu000/vibeguard (41 stars, last pushed today), licensed MIT. It adds 31 tokens to every session and 356 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 2026-08-30.