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 chris-dare-dev/agent-kit --skill handoffgit clone --depth 1 https://github.com/chris-dare-dev/agent-kitWrote 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/chris-dare-dev/agent-kit/handoff)<a href="https://agentmods.dev/skills/chris-dare-dev/agent-kit/handoff"><img src="https://agentmods.dev/badge/skills/chris-dare-dev/agent-kit/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/chris-dare-dev/agent-kit/handoff"><img src="https://agentmods.dev/badge/skills/chris-dare-dev/agent-kit/handoff.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00187 | $0.02791 |
| Opus 5.5 | $0.00075 | $0.01116 |
| Sonnet 5.5 | $0.00037 | $0.00558 |
| Haiku 4.5 | $0.00019 | $0.00279 |
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 1mo 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 — 201 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Handoff
Author continuation and/or review handoffs against the canonical contract in
.claude/references/handoff-contract.md, validate them with
.claude/scripts/handoff-validate.py, and wire review handoffs into the roadmap as optional
audit checkpoints. Works identically from Claude Code, Codex, and OpenCode — the contract and
validator are provider-neutral; the Obsidian surfacing step degrades gracefully on machines
without the vault tooling.
Continuations are live documents, not snapshots. When the workstream store is available
(contract §2a, workstream-state.md), the continuation handoff is
Workstreams/<slug>/continuation.md — one mutable file per workstream, gist-backed so every
machine sees the same state — and this skill UPDATES it in place rather than minting a dated
file. Review handoffs stay dated snapshots in the same workstream directory. The legacy
plans/HANDOFF-<date>-... form is the fallback for machines without the store.
When NOT to use
- To record a durable lesson or preference — that's
/memory-sync/ memory, not a handoff. - To advance or close a milestone —
/milestone-pipelineowns execution state; a handoff only describes it. - Mid-task context notes for yourself — handoffs are session-boundary artifacts.
Arguments
/handoff [continuation|review|both] [project-slug] [free-text notes]
- kind — omit to decide from the session: shipped milestone-scale work (commits landed across
≥1 milestone) →
both; mid-stream or light session →continuationonly. Say which you chose and why in the final report. - project-slug — omit to infer from the session's roadmap/milestone ids. This is the program
slug (e.g.
identity-seed,svcreg-supplychain-trust), used in the filename,project:frontmatter, and roadmap lookup. - notes — anything the user wants emphasized (e.g. "reviewer should focus on the live flip").
Steps
- Read the contract first:
.claude/references/handoff-contract.md— filename grammar, frontmatter schema, both body templates, the review-checkpoint format. Do not improvise frontmatter keys; legacy variants (type: session-handoff,handoff-kind:) break the vault Bases.
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.
- 1mo ago First seen · 201 lines · 187 tokens per session scan A db42e8baebb0
handoff is a skill published in the GitHub repository chris-dare-dev/agent-kit (0 stars, last pushed 2mo ago), licensed MIT. It adds 187 tokens to every session and 2,791 once invoked, about $0.0007 per session on Opus 5.5. 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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