handoff

handoff is a skill for Claude Code from anton-abyzov/specweave. It costs 44 tokens per session (674 once invoked), scanned A, original, MIT.

A handoff document generator that records durable work state in a short, portable file and removes secrets from the handoff. It is meant to help another AI tool or computer continue the work.

In plain words
What is it for?
Use it when changing tools or machines, running low on context, or pausing work that another agent must resume.
Why use it?
It avoids relying on a previous agent's conversation history, which another tool cannot read. The next agent can use the recorded progress, decisions, files, and pending tasks.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

Part of the sw plugin — 10 skills, 1 agent, 4 hooks shipped together

Good fit Use it when changing tools or machines, running low on context, or pausing work that another agent must resume.

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

Made for: Claude Code.

Or install sw, the plugin that ships this one along with the rest of its 10 skills, 1 agent, 4 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 handoff

README.md
[![agentmods](https://agentmods.dev/badge/skills/anton-abyzov/specweave/handoff.svg)](https://agentmods.dev/skills/anton-abyzov/specweave/handoff)
Your own site
<a href="https://agentmods.dev/skills/anton-abyzov/specweave/handoff"><img src="https://agentmods.dev/badge/skills/anton-abyzov/specweave/handoff.svg" alt="Measured on agentmods" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 674 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 3 findings, up to medium

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 →

  • medium Agent Snooping · line 31
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
  • medium Agent Snooping · line 41
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
  • medium MCP Rug Pull · line 41
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
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 $0.00044 $0.00674
Opus 5 $0.00022 $0.00337
Sonnet 5 $0.00009 $0.00135
Haiku 4.5 $0.00004 $0.00067

Measured 4d ago against content hash f1f0fd1a35f3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, 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 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/specweave/skills/handoff/SKILL.md · 42 lines

How it starts

The opening of the file, as written. The whole thing — 42 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Work Handoff (Cross-Tool)

No tool can read another's transcript. The portable thing is a ≤1-page handoff.md next to the increment, built from durable state (ledger fold, spec ACs, decisions, git diff) — any agent from any vendor resumes from it.

Steps

  1. Release your claims (rule 5): specweave task release --all-mine.

  2. Write the doc, adding only what the files cannot know:

    specweave handoff [incrementId] [--reason "…"] [--summary "…"] [--next "…"] [--gotcha "…"] [--decision "…"] [--inline]
    
    • id optional when exactly one increment is active; 2+ active → the CLI lists candidates, re-run with one.
    • --inline embeds the full body in the paste prompt (moving machines).
    • No SpecWeave workspace / no active increment → a git + notes handoff still gets written.
  3. Surface the CLI output verbatim: doc path first, then the .diff path, then the fenced paste prompt.

What is written

  • .specweave/increments/<id>/handoff.md (+ handoff.diff with the full uncommitted diff) — the single location; .specweave/state/handoff-latest.txt points at it.
  • Sections: Where I left off · Done / Pending (ledger table) · Decisions · Files touched · Next steps · Resume, ending with the Doc format v2 marker. Header line = agent id, branch @ sha, uncommitted count, redaction count, active claims. The doc format is specified once, in the standalone sw-handoff skill (skills/sw-handoff/SKILL.md) — read it there when writing or checking a handoff by hand.
  • Secrets are scrubbed heuristically — review before sharing. Nothing is committed for you; commit handoff.md if the next agent works from another clone.

Resuming from a handoff

Read handoff.mdspecweave task next <id> → claim → go. If the path does not exist on this machine, ask for the doc to be pasted; do not improvise context.

  • specweave status — where things stand, without writing a handoff. PreCompact hook writes the same doc automatically.
  • skills/sw-handoff/SKILL.md — the standalone, CLI-less version (vskill: npx vskill install anton-abyzov/specweave/sw-handoff) and the single source of truth for the document format.

Read the full file on GitHub · 42 lines

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 · 42 lines · 44 tokens per session scan A f1f0fd1a35f3

Subscribe to this mod's changes

handoff is a skill published in the GitHub repository anton-abyzov/specweave (160 stars, last pushed yesterday), licensed MIT. It adds 44 tokens to every session and 674 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 2026-09-03.

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