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slack-perseus-agent: Instructions file for Codex

AGENTS.md

slack-perseus-agent AGENTS.md is an instructions file for Codex, OpenCode from Perseus-Computing-LLC/slack-perseus-agent. It costs 474 tokens per session, scanned A, original, MIT.

A project guide for a Slack-based developer assistant that connects team conversations to live project information through MCP, a standard way for software tools to exchange context.

In plain words
What is it for?
Use it when working on the Perseus for Slack project, especially its Slack handlers, MCP connection, message formatting, error handling, or demo setup.
Why use it?
It gives coding agents the project background, file locations, build rules, and response requirements they need to make changes that fit the existing Slack app.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is Perseus-Computing-LLC/slack-perseus-agent's own configuration. It tells Codex and OpenCode how to work on slack-perseus-agent itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything slack-perseus-agent configures →

not rated 0repo 3mo ago A scan 474 tokens original MIT
View source ↗ Perseus-Computing-LLC/slack-perseus-agent slackhack.devpost.com
Reuse

Borrowing it

Nothing to install: this file belongs to Perseus-Computing-LLC/slack-perseus-agent. 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/Perseus-Computing-LLC/slack-perseus-agent/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/Perseus-Computing-LLC/slack-perseus-agent

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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README.md
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Per session 474 This file is loaded in full into every session.
When invoked 474 The same file — it is already loaded in full.
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 $0.00474 $0.00474
Opus 5.5 $0.00190 $0.00190
Sonnet 5.5 $0.00095 $0.00095
Haiku 4.5 $0.00047 $0.00047

Measured 2mo ago against content hash e17f8654670d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

slack-perseus-agent AGENTS.md 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.

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.

AGENTS.md · 44 lines

What it actually says

Project Context — Perseus for Slack

What this is

A Slack agent that connects developer teams to live project context via MCP. Built for the Slack Agent Builder Challenge 2026 (New Slack Agent track, $42K prize pool, July 13 deadline).

How it works

Slack user → Slack Bolt (Python, Socket Mode) → Perseus MCP server (JSON-RPC 2.0 over HTTP) → workspace/memory backends → formatted Slack Blocks response.

Key files

  • src/app.py — Slack Bolt app entry point
  • src/mcp_client.py — JSON-RPC MCP client for Perseus
  • src/handlers.py — Intent routing (services, memory, search, read, onboard, ask)
  • src/blocks.py — Slack Block Kit formatters

Build rules

  • Use sync not async unless existing async infrastructure
  • Prefer Slack Blocks over plain text for all responses
  • Every MCP call should have a fallback error block
  • Intent routing is regex-based; NL fallback uses memory recall
  • Demo is a terminal HTML simulation → Playwright → MP4

Hackathon resources

  • Devpost: https://slackhack.devpost.com/
  • Deadline: July 13, 2026 5pm PT
  • Track: New Slack Agent (MCP server integration)
  • Prize: $42,000 + Dreamforce trip
  • Requirements: ~3 min demo video, architecture diagram, Slack sandbox URL, GitHub repo

Repo

Perseus MCP tools used

  • perseus_services — service health
  • perseus_memory — Perseus Vault recall
  • perseus_mimir — direct FTS5 memory
  • perseus_read — file inspection
  • perseus_list — directory enumeration (also powers client-side code search)
  • perseus_skills — skill listing
  • perseus_context — workspace context
  • perseus_session — session history
  • perseus_inbox — messages
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. 2mo ago First seen · 44 lines · 474 tokens per session scan A e17f8654670d

Subscribe to this mod's changes

slack-perseus-agent AGENTS.md is an instructions file published in the GitHub repository Perseus-Computing-LLC/slack-perseus-agent (0 stars, last pushed 3mo ago), licensed MIT. It adds 474 tokens to every session, about $0.0019 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.

agentaideveloper-toolshackathonmcpperseus
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