What is codex-session?

A set of shell scripts for starting, resuming, listing, and deleting named Codex CLI sessions. Codex CLI is a command-line program for running coding-agent conversations, and the scripts save each session's identifier.

Use it to create a session with an initial prompt, send follow-up prompts, separate its working directory, or clear saved sessions.

It prevents multiple agent sessions from being confused with one another and lets you continue a named session later.

How akaghef/M3E configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to akaghef/M3E. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/akaghef/M3E/main/.claude/skills/claude-codex-session-pack-20260214/skills/codex-session/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/akaghef/M3E

Made for: Claude Code.

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/akaghef/m3e/codex-session/github.svg)](https://agentmods.dev/skills/akaghef/m3e/codex-session)

Your own site

<a href="https://agentmods.dev/skills/akaghef/m3e/codex-session"><img src="https://agentmods.dev/badge/skills/akaghef/m3e/codex-session/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/akaghef/m3e/codex-session"><img src="https://agentmods.dev/badge/skills/akaghef/m3e/codex-session.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 671 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	$0.00038	$0.00671
Opus 5.5	$0.00015	$0.00268
Sonnet 5.5	$0.00008	$0.00134
Haiku 4.5	$0.00004	$0.00067

Measured 5d ago against content hash 07da356ec512, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

codex-session 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 5d ago.

The scan reads SKILL.md. This mod also ships 4 executable files (scripts/clear.sh, scripts/list.sh, scripts/send.sh, …), 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/skills/claude-codex-session-pack-20260214/skills/codex-session/SKILL.md · 66 lines

What it actually says

Codex Session Manager

Codex CLI のセッションIDを ~/.cache/ai-agent-sessions/codex-session-<name> に保存し、複数セッションを混同せずに継続できるようにする。

Note: このスキルは Bash スクリプト群で、codex コマンドを別セッションとして起動・継続するためのものです。
Claude Code / Codex どちらの環境からでもシェルコマンドとして実行できます（スラッシュコマンドによる自動実行ではありません）。

使い方

セッション作成（ID保存）

~/.claude/skills/codex-session/scripts/start.sh [--cd <dir>] <name> "<初期プロンプト>"

例:

~/.claude/skills/codex-session/scripts/start.sh reviewer "コードレビュー役として動いてください"

# 作業ディレクトリを分離したい場合（このディレクトリの文脈/AGENTSから切り離す）
~/.claude/skills/codex-session/scripts/start.sh --cd /path/to/project reviewer "このリポジトリをレビューして"

セッション継続（保存済みIDでresume）

~/.claude/skills/codex-session/scripts/send.sh [--cd <dir>] <name> "<追加プロンプト>"

例:

# start 時と同じディレクトリを自動再利用（--cd省略可）
~/.claude/skills/codex-session/scripts/send.sh reviewer "この差分をレビューして"

# 明示的に上書きしたい場合
~/.claude/skills/codex-session/scripts/send.sh --cd /path/to/project reviewer "この差分をレビューして"

セッション一覧

~/.claude/skills/codex-session/scripts/list.sh

セッション削除

# 特定のセッションを削除
~/.claude/skills/codex-session/scripts/clear.sh <name>

# 全セッションを削除
~/.claude/skills/codex-session/scripts/clear.sh --all

注意事項

セッションIDは ~/.cache/ai-agent-sessions に保存される
推論強度は high（REASONING_EFFORT=high）で実行される
Codexの401エラーが頻発する場合は codex logout && codex login を試す
実装は共通コアに統一され、ログ探索結果をメタ情報として再利用するため、継続実行時の無駄な探索を減らしている

Files

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.

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.

5d ago First seen · 66 lines · 38 tokens per session scan A 07da356ec512

Subscribe to this mod's changes

codex-session is a skill published in the GitHub repository akaghef/M3E (11 stars, last pushed 5d ago), licensed MIT. It adds 38 tokens to every session and 671 once invoked, about $0.0002 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 2026-10-02.

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