A tool for saving or restoring a structured snapshot of an agent session. The snapshot records the goal, decisions, completed work, remaining tasks, constraints, and known issues.

Use it with commands such as handoff, save state, or resume to create or load a project handoff file.

It helps preserve context when a session is getting long, needs to be paused, or must continue in a fresh session.

handoff — Skill for Claude Code by psenger

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 psenger/ai-agent-skills --skill handoff

Clone the repo

git clone --depth 1 https://github.com/psenger/ai-agent-skills

Made for: Claude Code.

Or install psenger-skills, the plugin that ships this one along with the rest of its 14 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/psenger/ai-agent-skills/handoff/github.svg)](https://agentmods.dev/skills/psenger/ai-agent-skills/handoff)

Your own site

<a href="https://agentmods.dev/skills/psenger/ai-agent-skills/handoff"><img src="https://agentmods.dev/badge/skills/psenger/ai-agent-skills/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/psenger/ai-agent-skills/handoff"><img src="https://agentmods.dev/badge/skills/psenger/ai-agent-skills/handoff.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 194 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 896 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 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.

Model	Per session	Once invoked
Fable 5.1	$0.00194	$0.00896
Opus 5	$0.00097	$0.00448
Sonnet 5	$0.00039	$0.00179
Haiku 4.5	$0.00019	$0.00090

Measured 10d ago against content hash 21ee917e7642, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, 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 10d 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.

skills/handoff/SKILL.md · 115 lines

How it starts

The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Handoff

Saves or loads a structured JSON snapshot of session state. Use the schema in references/schema.md for all fields.

Mode Selection

User wants to save / pause / context is full → CREATE workflow
User wants to resume / load / continue → RESUME workflow
After 5+ file edits or a major decision → suggest: "We've made good progress — say 'create handoff' when you're ready to save state and start fresh."

CREATE Workflow

Step 1 — Determine Output File

Use the user's argument if provided (e.g. /handoff auth-work.json). Otherwise default to .claude/handoffs/YYYY-MM-DD-HHMMSS-<slug>.json in the project root, where <slug> is 2–4 words from the task goal (e.g. auth-refactor, payment-api). Create .claude/handoffs/ if it doesn't exist.

Step 2 — Analyse the Session

Review the full conversation and all modified files, then extract:

The primary goal and what "done" looks like (acceptance criteria)
All architectural and design decisions reached, with rationale
What has been completed and can be verified
What still needs to be done, in priority order
Hard constraints and non-negotiables
Known bugs, issues, or unresolved warnings
Which files were changed and what was done to each

Step 3 — Write the Handoff File

Write the JSON using the schema in references/schema.md. Do not omit any top-level field — use [] if there is nothing to report.

Step 4 — Confirm and Guide the User

Handoff written to: <filename>

Summary:
- Task: <goal>
- Completed: <N> steps
- Pending: <N> steps
- Constraints: <N>
- Open issues: <N>
- Modified files: <N>

Next steps:
1. Run /clear to wipe the context window
2. Start a new session
3. Paste this prompt to resume:

"<resume_prompt value>"

Do not run /clear yourself — the user must do this manually.

RESUME Workflow

Step 1 — Locate the File

Use the user's argument if given. Otherwise read .claude/handoffs/ and pick the most recent file by filename timestamp. If the directory is empty or missing, tell the user.

Read the full file on GitHub · 115 lines

Files

What ships with it

13 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.

10d ago First seen · 115 lines · 194 tokens per session scan A 21ee917e7642

Subscribe to this mod's changes

handoff is a skill published in the GitHub repository psenger/ai-agent-skills (10 stars, last pushed 3mo ago), licensed MIT. It adds 194 tokens to every session and 896 once invoked, about $0.0010 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 2026-08-31.

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