What is claude-session-handoff?

A tool that reads a previous Claude Code conversation log and prepares a handoff for Codex or another coding agent. Claude Code is an AI programming assistant that can leave its work recorded in a JSONL conversation file.

Use it when continuing work from a Claude Code session, finding a recent session for the current repository, or locating a session by date, project, or phrase.

It helps a new agent recover what was discussed and done without starting from memory or rereading an entire transcript. It also checks the current project so the handoff reflects the files that actually exist.

claude-session-handoff — Skill for Claude Code and Codex by buddyh

Install

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.

Any agent

npx skills add buddyh/agent-skills --skill claude-session-handoff

Clone the repo

git clone --depth 1 https://github.com/buddyh/agent-skills

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/buddyh/agent-skills/claude-session-handoff/github.svg)](https://agentmods.dev/skills/buddyh/agent-skills/claude-session-handoff)

Your own site

<a href="https://agentmods.dev/skills/buddyh/agent-skills/claude-session-handoff"><img src="https://agentmods.dev/badge/skills/buddyh/agent-skills/claude-session-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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/buddyh/agent-skills/claude-session-handoff"><img src="https://agentmods.dev/badge/skills/buddyh/agent-skills/claude-session-handoff.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 94 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 971 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00094	$0.00971
Opus 5.5	$0.00038	$0.00388
Sonnet 5.5	$0.00019	$0.00194
Haiku 4.5	$0.00009	$0.00097

Measured 2mo ago against content hash d3f25b0fd696, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

claude-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 2mo ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/claude_session_handoff.py, tests/test_claude_session_handoff.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

claude-session-handoff/SKILL.md · 102 lines

How it starts

The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Claude Session Handoff

Recover the state of a prior Claude Code session, then confirm what actually exists in the current workspace before continuing.

Workflow

1. Find the right session

Default to the current project path unless the user gives a specific JSONL file.

For the common handoff case, do not search every Claude transcript first. Bias toward the current repo, the most recent top-level session, and recent activity.

Run the helper script:

python3 scripts/claude_session_handoff.py --project-path "$PWD"

Useful variants:

python3 scripts/claude_session_handoff.py --project-path "$PWD" --list
python3 scripts/claude_session_handoff.py --project-path "$PWD" --date YYYY-MM-DD
python3 scripts/claude_session_handoff.py --session /path/to/session.jsonl
python3 scripts/claude_session_handoff.py --recent 10
python3 scripts/claude_session_handoff.py --project-path "$PWD" --date YYYY-MM-DD --contains "anchor phrase" --from-match

Use these defaults:

Start with the current repo and the newest top-level session.
If the user implies "today", resolve that to the exact local date and pass --date YYYY-MM-DD.
Read the last meaningful turns first. Do not read the entire transcript by default.
Use --list when multiple Claude sessions exist for the same project and you want the candidate set before choosing one.
Use --recent when the repo moved and the stored cwd no longer matches the current path.

2. Read only the meaningful turns

The helper script already filters the noisy parts, but keep these rules in mind:

Ignore subagents/ files unless the user explicitly wants delegated-session context.
Ignore local-command pseudo-messages such as <local-command-caveat>, <command-name>, and <local-command-stdout>.
Ignore assistant messages that are only [thinking] or other non-user-visible placeholders.
Treat images as context markers, not text that needs verbatim transcription.

Default to the most recent meaningful turns only. Large transcripts should be narrowed before you read deeply.

Read the full file on GitHub · 102 lines

Files

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.

Changes

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.

2mo ago First seen · 102 lines · 94 tokens per session scan A d3f25b0fd696

Subscribe to this mod's changes

claude-session-handoff is a skill published in the GitHub repository buddyh/agent-skills (5 stars, last pushed 3mo ago), licensed MIT. It adds 94 tokens to every session and 971 once invoked, about $0.0004 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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claude-session-handoff next to 6 skills from other repositories
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claude-session-handoffbuddyh/agent-skills	Skill	5	3mo ago	MIT	A	94	Claude Code, Codex
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agent-contextLeoYeAI/openclaw-master-skills	Skill	2.2k	2d ago	MIT	A	12	Claude Code, Codex
relevance-coarse-filterelvisun/newsjack	Skill	1.7k	2d ago	MIT	A	57	Claude Code