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 skills add toverux/cantrips --skill handoffgit clone --depth 1 https://github.com/toverux/cantripsWrote 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.
[](https://agentmods.dev/skills/toverux/cantrips/handoff)<a href="https://agentmods.dev/skills/toverux/cantrips/handoff"><img src="https://agentmods.dev/badge/skills/toverux/cantrips/handoff.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00019 | $0.00352 |
| Opus 5 | $0.00010 | $0.00176 |
| Sonnet 5 | $0.00004 | $0.00070 |
| Haiku 4.5 | $0.00002 | $0.00035 |
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 yesterday.
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
Write a handoff document summarising the current conversation so a fresh agent can continue the work. Save to the temporary directory of the user's OS - not the current workspace.
A handoff is compaction for resuming work, never a substitute for a spec: decisions that should outlive the session belong in the feature's spec — land them there first (a dated annotation, the annotate-spec verb), then reference the spec.
When the work has no spec, name those decisions in the handoff and flag them for /compound, so a durable store carries them instead of the temp file.
The loop config translates the storage verbs: it is docs/agents/cantrips-loop.md, and when that doc is absent the plugin defaults (defaults.md) govern.
Include a "suggested skills" section in the document, which suggests skills that the agent should invoke.
Reference artifacts already captured elsewhere (specs, plans, ADRs, issues, commits, diffs) by path or URL rather than duplicating their content.
Redact any sensitive information, such as API keys, passwords, or personally identifiable information.
If the user passed arguments, treat them as a description of what the next session will focus on and tailor the doc accordingly.
End by reporting the document's path so the user can point the fresh session at it.
What ships with it
1 file 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.
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.
- yesterday Changed 5a1a426f119e
- 6d ago First seen · 25 lines · 19 tokens per session scan A 562d866458e0
handoff is a skill published in the GitHub repository toverux/cantrips (2 stars, last pushed 3d ago), licensed MIT. It adds 19 tokens to every session and 352 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 2026-08-31.
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