Instructions for using project context files: documents that describe a codebase, its structure, recent fixes, settings, and known problems. They also explain separate context files for the supervisor itself.

Use them when starting work on a project, finding relevant architecture or validation notes, onboarding an agent, or recording important updates.

They give an agent the background it needs instead of making it rediscover project details in every session.

contexts — Cursor rule for Cursor by bifrost5/foundry

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/bifrost5/foundry

Made for: Cursor.

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/rules/bifrost5/foundry/contexts/github.svg)](https://agentmods.dev/rules/bifrost5/foundry/contexts)

Your own site

<a href="https://agentmods.dev/rules/bifrost5/foundry/contexts"><img src="https://agentmods.dev/badge/rules/bifrost5/foundry/contexts/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/rules/bifrost5/foundry/contexts"><img src="https://agentmods.dev/badge/rules/bifrost5/foundry/contexts.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 5 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 251 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 100% copy Near-identical to another mod 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	$0.00005	$0.00251
Opus 5.5	$0.00002	$0.00100
Sonnet 5.5	$0.00001	$0.00050
Haiku 4.5	$0.00001	$0.00025

Measured today against content hash 366a936c8c5a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

contexts 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.

Origin

This is a copy

100% identical to contexts — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.cursor/rules/contexts.mdc · 21 lines

What it actually says

Project Context Files (`contexts/`)

Context files in contexts/ provide detailed project documentation for agents with zero context.
Read relevant context file before working on a project (e.g., contexts/easeclassifieds/frontend.md for FE work).
Context files contain project structure, recent fixes, configuration, and common issues.
Update context files when making significant changes to keep them current.
Use context files to quickly onboard new agents or understand project state.

Supervisor Context Files (`supervisor-contexts/`)

Index: Read supervisor-contexts/CONTEXT.md first (<100 lines). It links to section files (overview, architecture, validation, usage, etc.).
Section files: Read specific files as needed (e.g., validation.md, tool-contracts.md).
Sliding Window: Check supervisor-contexts/windows/ for recent changes.
Usage: Use when working on the supervisor system itself (not project tasks).
Updates: Window files are manually maintained—do not auto-generate.

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.

today First seen · 21 lines · 5 tokens per session scan A 366a936c8c5a

Subscribe to this mod's changes

contexts is a cursor rule published in the GitHub repository bifrost5/foundry (12 stars, last pushed 3mo ago), licensed MIT. It adds 5 tokens to every session and 251 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to contexts, differing in 0 lines, and is treated as a copy.

Memory and context Writing and docs agent ai control-plane foundry software-factory supervisor

contexts next to 6 cursor rules from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
contextsbifrost5/foundry	Cursor rule	12	3mo ago	MIT	A	5	Cursor
contextsai-supervisor-foundry/foundry	Cursor rule	12	3mo ago	MIT	A	5	Cursor
supervisor-specsai-supervisor-foundry/foundry	Cursor rule	12	3mo ago	MIT	A	167	Cursor
cleanupai-supervisor-foundry/foundry	Cursor rule	12	3mo ago	MIT	A	9	Cursor
secretsai-supervisor-foundry/foundry	Cursor rule	12	3mo ago	MIT	A	4	Cursor
task-lifecycleai-supervisor-foundry/foundry	Cursor rule	12	3mo ago	MIT	A	32	Cursor
docsai-supervisor-foundry/foundry	Cursor rule	12	3mo ago	MIT	A	23	Cursor

contexts