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 allemaar/open-skills --skill handoffgit clone --depth 1 https://github.com/allemaar/open-skillsWrote 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/allemaar/open-skills/handoff)<a href="https://agentmods.dev/skills/allemaar/open-skills/handoff"><img src="https://agentmods.dev/badge/skills/allemaar/open-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.
<a href="https://agentmods.dev/skills/allemaar/open-skills/handoff"><img src="https://agentmods.dev/badge/skills/allemaar/open-skills/handoff.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00116 | $0.03807 |
| Opus 5 | $0.00058 | $0.01903 |
| Sonnet 5 | $0.00023 | $0.00761 |
| Haiku 4.5 | $0.00012 | $0.00381 |
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 12d 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.
How it starts
The opening of the file, as written. The whole thing — 270 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/handoff
Generates a structured handoff brief: YAML frontmatter (Obsidian-readable, vault-schema-compliant) + Obsidian-flavored markdown body containing YON-tagged structured blocks. The brief is the work item a fresh agent in a new session can pick up and execute autonomously.
Structured execution spec:
protocol.yon. It carries the workflow steps, the verify and sources gates, and the rules as validatable records; this file is the explanation. Keep the two in sync — edit one, update the other and refresh the@STAMPdate.
When to use
- UC1 — Dispatch a self-contained task to a fresh agent (
agentprofile) - UC4 — Dispatch a multi-step task that needs to be split into parallel sub-tasks (
orchestratorprofile) - UC3 — Switch the current session to a fresh one carrying in-flight state (
new-sessionprofile)
For UC2 (turn the current session into pure orchestrator mode), use /orchestrate-mode instead — that's a behavior switch, not a handoff artifact.
Output
Each handoff produces:
- A vault file (canonical) at
$VAULT/Handoffs/{project}/{YYYY-MM-DD}-{slug}.md(set$VAULTto your Obsidian vault root) - A chat surface (paste-convenience): full block if file < 500 lines; otherwise summary (first 30 lines) +
📄 Full brief: <path>
For multi-handoff (count=N): N files + a numbered index in chat (no per-brief content in chat).
The cold agent writes its retro to Handoffs/{project}/retros/{YYYY-MM-DD}-{slug}-retro.md (canonical file) AND emits it as a chat block (paste-back surface). Bidirectional brief↔retro linking is automatic via Obsidian's wikilink graph.
Workflow
1. Determine invocation path
| Path | Trigger | Behavior |
|---|---|---|
| 1. One-shot complete | /handoff agent task="..." where="..." evidence="..." acceptance="..." verify="..." |
Parse, validate required fields present, write file, emit chat surface. |
| 2. One-shot partial | /handoff agent task="..." (missing required) |
Parse, identify gaps, ask ONLY for missing required, then write. |
| 3. Interactive | /handoff (no args) |
Full Q&A from "What kind?" through all required. |
| 4. Multi one-shot | /handoff count=3 |
Each of N briefs runs independent profile-selection + Q&A. Emits N files + numbered index in chat. |
| 5. Multi interactive | /handoff then "I have 3 tasks" |
Detect intent, ask "How many?", then run Path 3 N times independently. |
| 6. Orchestrator subtasks | orchestrator profile selected |
If subtasks field unspecified → LLM auto-decomposes, surfaces for review. If specified → LLM validates 5 checks; pass = proceed; fail = findings + auto-/insight-assess. |
What ships with it
4 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.
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.
- 12d ago First seen · 270 lines · 116 tokens per session scan A b89847abc1a6
handoff is a skill published in the GitHub repository allemaar/open-skills (14 stars, last pushed 2d ago), licensed Apache-2.0. It adds 116 tokens to every session and 3,807 once invoked, about $0.0006 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.
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