session-handoff

session-handoff is a skill for Claude Code, Codex from n24q02m/claude-plugins. It costs 20 tokens per session (820 once invoked), scanned A, a copy of session-handoff, Apache-2.0.

A structured end-of-session note that records decisions, preferences, corrections, conventions, and unanswered questions, including why decisions were made.

In plain words
What is it for?
Use it to preserve the important reasoning and working agreements from a development session.
Why use it?
It reduces the need to reconstruct project context when starting another session.

Skill for Claude CodeCodex

Part of the mnemo-mcp plugin — 6 skills shipped together

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 skills/n24q02m/claude-plugins/session-handoff
Any agent
npx skills add n24q02m/claude-plugins --skill session-handoff
Clone the repo
git clone --depth 1 https://github.com/n24q02m/claude-plugins

Made for: Claude Code, Codex.

Or install mnemo-mcp, the plugin that ships this one along with the rest of its 6 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 session-handoff

README.md
[![agentmods](https://agentmods.dev/badge/skills/n24q02m/claude-plugins/session-handoff.svg)](https://agentmods.dev/skills/n24q02m/claude-plugins/session-handoff)
Your own site
<a href="https://agentmods.dev/skills/n24q02m/claude-plugins/session-handoff"><img src="https://agentmods.dev/badge/skills/n24q02m/claude-plugins/session-handoff.svg" alt="Measured on agentmods" height="20"></a>
Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 820 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% 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 $0.00020 $0.00820
Opus 5 $0.00010 $0.00410
Sonnet 5 $0.00004 $0.00164
Haiku 4.5 $0.00002 $0.00082

Measured 5d ago against content hash 84eb045ad341, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

session-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 5d 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

100% identical to session-handoff — 0 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.

plugins/mnemo-mcp/skills/session-handoff/SKILL.md · 80 lines

How it starts

The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Session Handoff

Structured end-of-session capture that ensures the NEXT session starts with full context. Enforces "WHY not just WHAT" — every memory must include the reasoning, not just the fact.

Checklist (go through ALL categories)

Before storing anything, review the conversation for each category:

  1. Decisions made: Technical choices, architecture decisions, tool selections

    • BAD: "Using PostgreSQL"
    • GOOD: "Using PostgreSQL over SQLite because we need concurrent writes from multiple workers and the data exceeds 10GB"
  2. Preferences expressed: User's workflow preferences, style choices, communication preferences

    • BAD: "Prefers short commits"
    • GOOD: "Prefers atomic commits (one logical change per commit) because they review PRs commit-by-commit and need clean bisect history"
  3. Corrections given: Things the user corrected — these are HIGH PRIORITY (prevents repeat mistakes)

    • BAD: "Don't use fmt.Println"
    • GOOD: "Corrected: use log.Printf not fmt.Println in Go services because stdout is not captured by the log aggregator (Alloy)"
  4. Conventions established: Naming patterns, file organization, coding standards

    • BAD: "Use snake_case"
    • GOOD: "Convention: snake_case for Python files and functions, but PascalCase for Pydantic models. Established because the codebase mixes both and this was the cleanup decision"
  5. Open questions: Unresolved items that need future attention

    • Store these explicitly so the next session can address them
    • Include what was already tried or considered

Storage Process

For each item identified above:

  1. Store with context using memory(action="add", ...):

    • Content MUST include WHY, not just WHAT
    • Tag with category: decision, preference, correction, convention, open-question
    • Tag with project name for scoped retrieval
    • Include date context if time-sensitive
  2. Verify retrieval (mandatory — do NOT skip):

    • memory(action="search", query="[natural terms someone would use to find this]")
    • If the memory does not appear in top results, either:
      • Rewrite content with better keywords
      • Add more specific tags
    • A memory that cannot be found is worthless

Read the full file on GitHub · 80 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. 5d ago First seen · 80 lines · 20 tokens per session scan A 84eb045ad341

Subscribe to this mod's changes

session-handoff is a skill published in the GitHub repository n24q02m/claude-plugins (4 stars, last pushed today), licensed Apache-2.0. It adds 20 tokens to every session and 820 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to session-handoff, differing in 0 lines, and is treated as a copy.

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