create_plan

An interactive command for researching a software change and writing a detailed implementation plan.

In plain words
What is it for?
Use it to investigate a codebase, consider options, and produce a plan for making the change.
Why use it?
It helps clarify the work and its approach before implementation starts.

Command for Claude Code

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 commands/humanlayer/humanlayer/create_plan
Clone the repo
git clone --depth 1 https://github.com/humanlayer/humanlayer

Made for: Claude Code.

Per session 9 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,288 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown 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 $0.00009 $0.03288
Opus 5 $0.00005 $0.01644
Sonnet 5 $0.00002 $0.00658
Haiku 4.5 $0.00001 $0.00329

Measured yesterday against content hash 2a4b16e8050a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

create_plan scanned grade A with 1 finding 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 yesterday.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- [ ] API endpoint returns 200: `curl localhost:8080/api/new-endpoint`
.claude/commands/create_plan.md · 450 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. yesterday First seen · 450 lines · 9 tokens per session scan A 2a4b16e8050a

Subscribe to this mod's changes

create_plan is a command published in the GitHub repository humanlayer/humanlayer (11,355 stars, last pushed 2mo ago), with no licence file. It adds 9 tokens to every session and 3,288 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.