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 lhh1301506137/CoTend --skill cotend-session-handoffgit clone --depth 1 https://github.com/lhh1301506137/CoTendWrote 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/lhh1301506137/cotend/cotend-session-handoff)<a href="https://agentmods.dev/skills/lhh1301506137/cotend/cotend-session-handoff"><img src="https://agentmods.dev/badge/skills/lhh1301506137/cotend/cotend-session-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 | $0.00055 | $0.00342 |
| Opus 5 | $0.00028 | $0.00171 |
| Sonnet 5 | $0.00011 | $0.00068 |
| Haiku 4.5 | $0.00006 | $0.00034 |
Grade A, and why
cotend-session-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
CoTend Session Handoff
Protocol version: cotend-session-handoff-v1.3
Compatibility baseline: cotend-collaboration-v2.01.
Literal Invocation Gate
Evaluate only whether the current user input contains the exact literal
$cotend-session-handoff. A Skill-picker/link invocation qualifies because
that literal appears in the input.
If the literal is absent:
- return only:
如需生成同一主力开发者的新会话交接包，请显式调用 $cotend-session-handoff。 - do not read the repository, project instructions, status, Plan Tree, handoff packets, or any reference;
- do not call tools, run preflight, generate files, or alter project state.
This zero-secondary-read exit is identical in Full and Adaptive. A platform false-positive selection must therefore cost only this short gate and hint.
If the literal is present:
- Read
references/session-handoff-workflow.mdcompletely. - Follow that single direct workflow reference. Load any further canonical Collaboration modules only when that workflow's existing trigger requires them.
- If the direct workflow reference is missing or unreadable, report
missing_required_modules: [session-handoff-workflow]and stop.
Do not duplicate the detailed handoff contract in this entry file.
What ships with it
2 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 · 39 lines · 55 tokens per session scan A e25803a9c46c
cotend-session-handoff is a skill published in the GitHub repository lhh1301506137/CoTend (2 stars, last pushed 17d ago), licensed Apache-2.0. It adds 55 tokens to every session and 342 once invoked, about $0.0003 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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