A session manager for using the Codex command-line coding agent to plan or implement work. It provides commands to start, continue, list, and remove named implementation sessions.

It is for creating and continuing Codex implementation sessions, listing active sessions, and clearing one or all saved sessions.

It lets developers keep implementation conversations separate and resume them later with the same working directory and saved session state.

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

Your own site

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

Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 408 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	$0.00031	$0.00408
Opus 5.5	$0.00012	$0.00163
Sonnet 5.5	$0.00006	$0.00082
Haiku 4.5	$0.00003	$0.00041

Measured 5d ago against content hash 767e394dc764, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

codex-impl 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-impl/SKILL.md · 47 lines

What it actually says

Codex Impl Session Manager

Codex CLI（gpt-5.3-codex モデル）を使った実装用セッション管理。

/cx（gpt-5.2）は計画・設計用、/cxi（gpt-5.3-codex）は実装用として使い分ける。

使い方

セッション作成

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

セッション継続

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

--cd を省略した場合、start.sh 時の作業ディレクトリ設定を再利用します。

セッション一覧

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

セッション削除

~/.claude/skills/codex-impl/scripts/clear.sh <name>
~/.claude/skills/codex-impl/scripts/clear.sh --all

注意事項

セッションIDは ~/.cache/ai-agent-sessions/codex-impl-session-<name> に保存される
推論強度は xhigh（REASONING_EFFORT=xhigh）で実行される
/cx のセッションとは別管理（混同しない）
実装は共通コア化され、継続時はログ探索結果を再利用する

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 · 47 lines · 31 tokens per session scan A 767e394dc764

Subscribe to this mod's changes

codex-impl is a skill published in the GitHub repository akaghef/M3E (11 stars, last pushed 5d ago), licensed MIT. It adds 31 tokens to every session and 408 once invoked, about $0.0001 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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M3E: Skill for Claude Code