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 KirKruglov/claude-skills-kit --skill session-handoff-composergit clone --depth 1 https://github.com/KirKruglov/claude-skills-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/kirkruglov/claude-skills-kit/session-handoff-composer)<a href="https://agentmods.dev/skills/kirkruglov/claude-skills-kit/session-handoff-composer"><img src="https://agentmods.dev/badge/skills/kirkruglov/claude-skills-kit/session-handoff-composer/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/kirkruglov/claude-skills-kit/session-handoff-composer"><img src="https://agentmods.dev/badge/skills/kirkruglov/claude-skills-kit/session-handoff-composer.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 | $0.00077 | $0.01275 |
| Opus 5 | $0.00039 | $0.00638 |
| Sonnet 5 | $0.00015 | $0.00255 |
| Haiku 4.5 | $0.00008 | $0.00128 |
Grade A, and why
session-handoff-composer 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 9d 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 — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Session Handoff Composer
This skill composes a structured handoff document for transferring context into a new chat session. It extracts key information from the current conversation — decisions made, ongoing tasks, open questions, files involved, and next steps — and formats everything into a ready-to-paste markdown block.
Input: Current conversation context (read automatically); optional additions from the user
Output: Structured markdown handoff block + one-line opener for the new session
Language Detection
Detect the user's language from their message:
- If Russian (or contains Cyrillic): respond in Russian
- If English (or other Latin-script language): respond in English
- If ambiguous: respond in the language of the trigger phrase used
Instructions
Step 1: Check Session Content
-
Assess whether the current session has meaningful content to hand off
- If user invoked the skill at the very start with no prior content: respond "Nothing to hand off yet — session has just started. Call this skill when context fills up."
- If session has fewer than 5 exchanges AND no decisions or tasks were established: respond "Session is short — nothing significant to hand off yet. Call this skill when context fills up."
- If session has content but is short (< 5 exchanges), proceed to Step 2 and output minimal handoff in Step 4
-
Detect session language
- If the conversation is primarily in Russian: produce the handoff document in Russian
- Otherwise: produce the handoff document in English
Step 2: Extract Session Elements
Scan the conversation and collect the following:
-
Done — completed tasks and final decisions made in this session
- Include decisions that were confirmed, files that were created/edited, analyses completed
-
In Progress — tasks started but not finished
- Note the current state of each (e.g., "draft created, needs review")
-
Open Questions — unresolved issues, pending decisions, blockers
- Include anything that requires follow-up in the next session
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.
- 9d ago First seen · 134 lines · 77 tokens per session scan A 049ec95b7e6e
session-handoff-composer is a skill published in the GitHub repository KirKruglov/claude-skills-kit (18 stars, last pushed 1mo ago), licensed MIT. It adds 77 tokens to every session and 1,275 once invoked, about $0.0004 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 2026-09-03.
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