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.
npx agentmods add commands/helloruru/claude-memory-engine/handoffgit clone --depth 1 https://github.com/HelloRuru/claude-memory-engineWhat 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 | $0.00011 | $0.00311 |
| Opus 5 | $0.00005 | $0.00156 |
| Sonnet 5 | $0.00002 | $0.00062 |
| Haiku 4.5 | $0.00001 | $0.00031 |
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 2d 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.
What it actually says
Session Handoff
Generate a handoff file so another Claude Code session can continue where this one left off.
Steps
-
Analyze current session — What are you working on right now? What files have been modified? What decisions were made?
-
Write handoff file — Save to the project's memory directory as
handoff-{topic}.mdwith this format:
---
name: handoff-{topic}
description: {one-line summary of what needs to be handed off}
type: project
---
# {Title} Handoff
**Status:** {what's done / what's pending}
**Date:** {today}
## What was done
{bullet list of completed work}
## What's left to do
- [ ] {pending task 1}
- [ ] {pending task 2}
## Key decisions
{any decisions the next session needs to know about}
## Files modified
{list of files changed in this session}
- Confirm — Tell the user the handoff file has been saved and will be automatically detected by the next session.
How it works
- SessionStart hook automatically reads all unread
handoff-*.mdfiles when a new conversation starts - memory-sync hook detects new handoff files appearing mid-conversation and alerts immediately
- Handoff files are tracked in
.handoff-read.jsonso they're only shown once
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.
- 2d ago First seen · 48 lines · 11 tokens per session scan A f03e2d127bd5
handoff is a command published in the GitHub repository HelloRuru/claude-memory-engine (133 stars, last pushed 3mo ago), licensed MIT. It adds 11 tokens to every session and 311 once invoked, about $0.0001 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 2026-08-30.
Other commands, from other repositories
design-review
Workflow recipe — review a design end-to-end, ending in measured numbers rather than adjectives, by chaining 4 skills.
setup-pm-skills
Onboard a new user — find out what they do, recommend the right bundles & top skills, and set up a project CONTEXT.md so every skill is tailored to them.
statusbar-style
Switch the status-bar style (classic / capsule / hairline).
validate-dependencies
Validate all task dependencies for issues.
fest-show
Show festival progression (in-progress tasks, roadmap, and dependency view).
superpowers-execute
Execute the current GSD phase plan with Superpowers instead of gsd-execute-phase.