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 sgaabdu4/hard-eng --skill handoffgit clone --depth 1 https://github.com/sgaabdu4/hard-engWrote 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/sgaabdu4/hard-eng/handoff)<a href="https://agentmods.dev/skills/sgaabdu4/hard-eng/handoff"><img src="https://agentmods.dev/badge/skills/sgaabdu4/hard-eng/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 | $0.00023 | $0.00405 |
| Opus 5 | $0.00012 | $0.00202 |
| Sonnet 5 | $0.00005 | $0.00081 |
| Haiku 4.5 | $0.00002 | $0.00040 |
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 8d 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
Handoff
Contract
- Owner file =
HANDOFF.mdat repository root; no repository → current working directory; one file + overwrite; handoff history forbidden. - Content = observed session facts only; invention/padding forbidden; unknown = recorded
Unknown. - Secrets/credentials/tokens = excluded; record storage location pointer instead.
- Handoff = context for the next session; current user message wins on conflict.
Route
| State | Action | Completion |
|---|---|---|
| Active session with work to transfer | Write per template.md | Every section filled or explicit None + fresh-reader validation PASS + path reported |
Fresh session + HANDOFF.md exists |
Resume per resume.md | Verified state summary reported + first Next step started |
Fresh session + no HANDOFF.md |
Report absence → ask for path or scope | User answer |
Write
- Timing = before close/compaction; sending session writes; reconstruction from memory forbidden.
- Scan = full conversation + git state + task/plan state + verification receipts + unanswered user asks.
- Arguments = next-session focus; tailor Goal + Next to it.
- Terse = fact-dense bullets; narrative/history prose forbidden.
- Artifact-backed fact (brief | plan | ADR | issue | PR | commit | diff | doc) = pointer + one-line gist; duplication forbidden.
- Conversation-only fact (user ask | correction | constraint | preference | finding) = inlined in full; it dies with the session.
- Fresh-reader validation = re-read written file; any bullet needing conversation access to act on → rewrite; conversation-only shorthand/pronouns forbidden.
What ships with it
3 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.
- 8d ago First seen · 34 lines · 23 tokens per session scan A 9922ec57ea25
handoff is a skill published in the GitHub repository sgaabdu4/hard-eng (5 stars, last pushed today), licensed MIT. It adds 23 tokens to every session and 405 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.
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