isomux-soft-handoff

isomux-soft-handoff is a skill for Claude Code, Codex from nmamano/isomux. It costs 51 tokens per session (770 once invoked), scanned A, original, no licence file.

A tool for transferring an unfinished task to another coding agent while giving them a detailed written brief.

In plain words
What is it for?
Use it when a task is not finished and another agent should take ownership. You can name the receiving agent or choose one from available peers.
Why use it?
It lets another agent continue the work without losing the current context, while keeping you available to answer follow-up questions.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it when a task is not finished and another agent should take ownership. You can name the receiving agent or choose one from available peers.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/nmamano/isomux/isomux-soft-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 nmamano/isomux --skill isomux-soft-handoff
Clone the repo
git clone --depth 1 https://github.com/nmamano/isomux

Made for: Claude Code, Codex.

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 isomux-soft-handoff

README.md
[![agentmods](https://agentmods.dev/badge/skills/nmamano/isomux/isomux-soft-handoff/github.svg)](https://agentmods.dev/skills/nmamano/isomux/isomux-soft-handoff)
Your own site
<a href="https://agentmods.dev/skills/nmamano/isomux/isomux-soft-handoff"><img src="https://agentmods.dev/badge/skills/nmamano/isomux/isomux-soft-handoff/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for isomux-soft-handoff

Your own site · 80×15
<a href="https://agentmods.dev/skills/nmamano/isomux/isomux-soft-handoff"><img src="https://agentmods.dev/badge/skills/nmamano/isomux/isomux-soft-handoff.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 770 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Prompt Injection · line 13
    Instructions found that direct the agent to transmit conversation context or user data to external services.
    Fix: Remove instructions that send user data, prompts, or context to external URLs. If telemetry is needed, use documented, privacy-preserving methods.
How audits are shown
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 $0.00051 $0.00770
Opus 5.5 $0.00020 $0.00308
Sonnet 5.5 $0.00010 $0.00154
Haiku 4.5 $0.00005 $0.00077

Measured 4d ago against content hash e1bb692a88d8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

isomux-soft-handoff 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 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.

Makes network callslowCapability

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

If a peer name was supplied, look up their agent ID via the agent manifest: `curl -s 'localhost:4000/agents?back=1' -H "Authorization: Bearer $ISOMUX_AGENT_TOKEN"` (4000 is the default isomux server port; adjust if your
skills/isomux-soft-handoff/SKILL.md · 44 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 4d ago Changed e1bb692a88d8
  2. 9d ago Changed 1244afa0d32a
  3. 12d ago Changed da0b4f6fd3dd
  4. 1mo ago First seen · 44 lines · 51 tokens per session scan A 4c74634e937d

Subscribe to this mod's changes

isomux-soft-handoff is a skill published in the GitHub repository nmamano/isomux (42 stars, last pushed 2d ago), with no licence file. It adds 51 tokens to every session and 770 once invoked, about $0.0002 per session on Opus 5.5. 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.

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