handoff

handoff is a skill for Claude Code, Codex from mrclrchtr/supi. It costs 19 tokens per session (178 once invoked), scanned A, a copy of handoff, MIT.

A handoff document generator for passing the current conversation from one coding agent to another. The document records what the next agent needs and is saved in the operating system's temporary directory.

In plain words
What is it for?
Use it before ending an agent session or switching agents. It creates a summary of the work, focus areas supplied by the user, and suggested skills for continuing.
Why use it?
It prevents the next agent from having to reconstruct the conversation from scratch. It also keeps sensitive information out and points to existing project artifacts instead of copying them.

Skill for Claude CodeCodex

Written for Claude Code and Codex: disable-model-invocation in frontmatter, but also agents/openai.yaml present.

Part of the mattpocock-skills plugin — 25 skills shipped together

Good fit Use it before ending an agent session or switching agents.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mrclrchtr/supi/handoff
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.

Any agent
npx skills add mrclrchtr/supi --skill handoff
Clone the repo
git clone --depth 1 https://github.com/mrclrchtr/supi

Made for: Claude Code, Codex.

Or install mattpocock-skills, the plugin that ships this one along with the rest of its 25 skills.

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 handoff

README.md
[![agentmods](https://agentmods.dev/badge/skills/mrclrchtr/supi/handoff.svg)](https://agentmods.dev/skills/mrclrchtr/supi/handoff)
Your own site
<a href="https://agentmods.dev/skills/mrclrchtr/supi/handoff"><img src="https://agentmods.dev/badge/skills/mrclrchtr/supi/handoff.svg" alt="Measured on agentmods" height="20"></a>
Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 178 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 88% copy Near-identical to another mod 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 $0.00019 $0.00178
Opus 5 $0.00010 $0.00089
Sonnet 5 $0.00004 $0.00036
Haiku 4.5 $0.00002 $0.00018

Measured 7d ago against content hash 57c9f1f392d7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

handoff 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 7d 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.

Origin

This is a copy

88% identical to handoff — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/productivity/handoff/SKILL.md · 17 lines

What it actually says

Write a handoff document summarising the current conversation so a fresh agent can continue the work. Save to the temporary directory of the user's OS - not the current workspace.

Include a "suggested skills" section in the document, which suggests skills that the agent should invoke.

Do not duplicate content already captured in other artifacts (specs, plans, ADRs, issues, commits, diffs). Reference them by path or URL instead.

Redact any sensitive information, such as API keys, passwords, or personally identifiable information.

If the user passed arguments, treat them as a description of what the next session will focus on and tailor the doc accordingly.

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 7d ago First seen · 17 lines · 19 tokens per session scan A 57c9f1f392d7

Subscribe to this mod's changes

handoff is a skill published in the GitHub repository mrclrchtr/supi (88 stars, last pushed today), licensed MIT. It adds 19 tokens to every session and 178 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 88% identical to handoff, differing in 2 lines, and is treated as a copy.