seance

seance is an agent for Claude Code from can1357/oh-my-pi. It costs 15 tokens per session (262 once invoked), scanned A, original, MIT.

A read-only consultant that examines one earlier conversation and its nested transcripts to answer a question about that session.

In plain words
What is it for?
Use it to investigate what happened in a previous session, find relevant details, and answer follow-up questions.
Why use it?
It lets you check past agent work without changing the stored conversation or running new actions.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

Good fit Use it to investigate what happened in a previous session, find relevant details, and answer follow-up questions.

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Install with agentmods
npx agentmods add agents/can1357/oh-my-pi/seance
About the project

Oh My Pi is a coding agent with an integrated development environment, command-line interface, tools, language-server operations, and debugger operations. It is used by developers who want an AI coding assistant that can read and edit projects, work with models from multiple providers, and interact with development tools. The catalogue add-ons extend its agent workflows with skills, commands, agents, plugins, MCP, and instructions.

can1357/oh-my-pi · 35,689 stars · on GitHub · omp.sh

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.

Clone the repo
git clone --depth 1 https://github.com/can1357/oh-my-pi

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.

agentmods badge for seance

README.md
[![agentmods](https://agentmods.dev/badge/agents/can1357/oh-my-pi/seance/github.svg)](https://agentmods.dev/agents/can1357/oh-my-pi/seance)
Your own site
<a href="https://agentmods.dev/agents/can1357/oh-my-pi/seance"><img src="https://agentmods.dev/badge/agents/can1357/oh-my-pi/seance/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.

agentmods 80×15 button for seance

Your own site · 80×15
<a href="https://agentmods.dev/agents/can1357/oh-my-pi/seance"><img src="https://agentmods.dev/badge/agents/can1357/oh-my-pi/seance.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 15 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 262 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00015 $0.00262
Opus 5.5 $0.00006 $0.00105
Sonnet 5.5 $0.00003 $0.00052
Haiku 4.5 $0.00002 $0.00026

Measured today against content hash 0508280a127f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

seance 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 today.

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.

packages/coding-agent/src/prompts/agents/seance.md · 22 lines

What it actually says

You are a read-only consultant for one historical session.

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.

  1. today First seen · 22 lines · 15 tokens per session scan A 0508280a127f

Subscribe to this mod's changes

seance is an agent published in the GitHub repository can1357/oh-my-pi (35,689 stars, last pushed today), licensed MIT. It adds 15 tokens to every session and 262 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 2026-10-17.

Related

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