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Agent skill

Session Mode

by Arch1eSUN in Arch1eSUN/Arcgentic

A skill your agent uses when a project has not yet stored session mode, when a user asks for complete arcgentic workflow execution, or when role identity handoff prompts are needed.

MITAuto-check passedAgent Workflows

Install Session Mode

skills CLI
$ npx skills add Arch1eSUN/Arcgentic --skill session-mode -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install Arch1eSUN/Arcgentic session-mode --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/Arch1eSUN/Arcgentic.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/session-mode .claude/skills/session-mode && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
session-mode
GitHub stars
286
Token cost
~500 tokens
SKILL.md length
184 words
Files
1
Skills in repo
19
Repo updated
First seen
Licence
MIT

At a glance

A skill your agent uses when a project has not yet stored session mode, when a user asks for complete arcgentic workflow execution, or when role identity handoff prompts are needed.

  • Works in 6 steps: Read .agentic-rounds/state.yaml and the… → If project.session_mode.mode is already… → If no project-level mode exists,… → …
  • A project has not yet stored session mode
  • SKILL.md covers Workflow and Boundaries
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Session Mode is an agent skill from Arch1eSUN/Arcgentic. Use when a project has not yet stored session mode, when a user asks for complete arcgentic workflow execution, or when role identity handoff prompts are needed.

Its SKILL.md is about 500 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Agent Workflows. The repository describes itself as: Mechanical plan/dev/self-audit/external-audit gates for AI coding agents, with a configurable role-routing topology engine, an MCP-UI live status panel, and native-tooling Claude… The licence is MIT.

When your agent uses it

  • A project has not yet stored session mode
  • A user asks for complete arcgentic workflow execution
  • Role identity handoff prompts are needed

Example prompts

  • “/session-mode”

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

  1. Read .agentic-rounds/state.yaml and the round handoff.
  2. If project.session_mode.mode is already set, treat it as fact and skip the
  3. If no project-level mode exists, generate a recommendation
  4. Print recommendation, confidence, reasons, suggested role identities, and override
  5. Print only the identity handoff prompt needed for the next role
  6. For V2 Codex-native orchestration, generate the fixed-role host plan instead

What it can do on your machine

Read from SKILL.md and the folder at commit 8539955. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Session Mode loads about 500 tokens when it runs. Until then it costs about 44 tokens; SKILL.md has 184 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~44
When it runs · the whole SKILL.md, loaded when a task matches
~500

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from Arch1eSUN/Arcgentic at commit 8539955, republished under its MIT licence (© Arch1eSUN). 184 words, ~500 tokens.

Download SKILL.mdSave it as .claude/skills/session-mode/SKILL.md (or your agent's skills folder).
name
session-mode
description
Use when a project has not yet stored session mode, when a user asks for complete arcgentic workflow execution, or when role identity handoff prompts are needed.

session-mode

Resolves project-level single-session vs multi-session execution and prints role-specific identity prompts. Once project.session_mode is present in .agentic-rounds/state.yaml, do not ask again per round.

Workflow

  1. Read .agentic-rounds/state.yaml and the round handoff.

  2. If project.session_mode.mode is already set, treat it as fact and skip the recommendation/choice step.

  3. If no project-level mode exists, generate a recommendation:

    bash
    arcgentic session-mode recommend \
  --round <round-id> \
  --handoff <handoff-path>

  4. Print recommendation, confidence, reasons, suggested role identities, and override instructions before asking the user to choose.

  5. Print only the identity handoff prompt needed for the next role:

    bash
    arcgentic session-mode prompt \
  --round <round-id> \
  --handoff <handoff-path> \
  --mode multi-session \
  --role developer

    V1 valid roles: developer, auditor, closeout.

  6. For V2 Codex-native orchestration, generate the fixed-role host plan instead of per-round role prompts:

    bash
    arcgentic v2-session-plan \
  --state .agentic-rounds/state.yaml \
  --host codex

    V2 session roles are fixed to Orchestrator, Planner, Developer, and Auditor. close-round is an orchestrator-owned command, not a session role.

Boundaries

  • Do not enter developer work before the mode gate is resolved.
  • Do not re-ask the user when project-level mode is already stored.
  • Do not claim single-session auto-audit when dispatch transport is unavailable.
  • In V1, developer, auditor, and closeout identity prompts must remain separate.
  • In V2, keep exactly four fixed role sessions and never create round-numbered role threads.

© Arch1eSUN, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/session-mode of Arch1eSUN/Arcgentic.

Open the folder on GitHubat commit 8539955

Compare with similar skills

Session Mode next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Session Mode compared with similar skills
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Session Mode this skillArch1eSUN/Arcgentic286—~500Automated safety check: PassMIT
MCP Server Builderanthropics/skills180k64 repos~2.3kAutomated safety check: PassApache-2.0
Hook Development for Claude Code Pluginsanthropics/claude-plugins-official38k11 repos~4.1kAutomated safety check: NotesApache-2.0
Using Superpowersfarm-fe/farm5.6k35 repos~1.4kAutomated safety check: PassMIT
Executing Plans Inlineobra/superpowers296k2 repos~5.1kAutomated safety check: PassMIT
Claude Code Agent Developmentanthropics/claude-plugins-official38k8 repos~2.8kAutomated safety check: PassApache-2.0

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  • Claude Code Session Broker

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Categories

Questions about Session Mode

What does Session Mode do?

A skill your agent uses when a project has not yet stored session mode, when a user asks for complete arcgentic workflow execution, or when role identity handoff prompts are needed. Session Mode is an agent skill from Arch1eSUN/Arcgentic. Use when a project has not yet stored session mode, when a user asks for complete arcgentic workflow execution, or when role identity handoff prompts are needed.

When should I use Session Mode?

Session Mode fits situations like: A project has not yet stored session mode; A user asks for complete arcgentic workflow execution; role identity handoff prompts are needed.

How do I install Session Mode in Claude Code?

Run `npx skills add Arch1eSUN/Arcgentic --skill session-mode -a claude-code`. Or copy the skill folder (skills/session-mode in Arch1eSUN/Arcgentic) into .claude/skills/session-mode in your project. Claude Code loads it when a task matches its description.

How do I install Session Mode in Codex?

Run `npx skills add Arch1eSUN/Arcgentic --skill session-mode -a codex`. Or copy the skill folder (skills/session-mode in Arch1eSUN/Arcgentic) into .agents/skills/session-mode in your project. Codex loads it when a task matches its description.

Can I use Session Mode in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Arch1eSUN/Arcgentic --skill session-mode -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/session-mode, .gemini/skills/session-mode, .github/skills/session-mode and .opencode/skills/session-mode in your project.

What does Session Mode need to run?

SKILL.md names no scripts, command-line tools or credentials: Session Mode is instructions for the agent only.

Does Session Mode access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Session Mode safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Session Mode use?

Session Mode is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Session Mode use?

About 500 tokens (SKILL.md is roughly 2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Session Mode?

Skills that share tags, products or a category with Session Mode: MCP Server Builder (anthropics/skills, 180k stars), Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 38k stars), Using Superpowers (farm-fe/farm, 5.6k stars) and Executing Plans Inline (obra/superpowers, 296k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Session Mode?

Arch1eSUN (a GitHub user) maintains it in Arch1eSUN/Arcgentic, which has 286 GitHub stars. The repository holds 19 skills in this directory. The repository was last updated on October 2, 2026.

Source: Arch1eSUN/Arcgentic on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.