Architecture and workflow rules for coding agents working on Diffuse, a local-first group of native Apple apps. They describe the project's layers, privacy boundaries, required documentation, and verification commands.

Use them before editing Diffuse code and when checking that a new capability follows the project's dependency and testing rules.

They keep agents from introducing cloud services, unwanted packages, unsafe changes, or violations of the shared architecture.

diffuse — Cursor rule for Cursor by hoangsonww/Diffuse-Native-Apps

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/hoangsonww/Diffuse-Native-Apps

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/hoangsonww/diffuse-native-apps/diffuse/github.svg)](https://agentmods.dev/rules/hoangsonww/diffuse-native-apps/diffuse)

Your own site

<a href="https://agentmods.dev/rules/hoangsonww/diffuse-native-apps/diffuse"><img src="https://agentmods.dev/badge/rules/hoangsonww/diffuse-native-apps/diffuse/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/hoangsonww/diffuse-native-apps/diffuse"><img src="https://agentmods.dev/badge/rules/hoangsonww/diffuse-native-apps/diffuse.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 181 This file is loaded in full into every session.

When invoked 181 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.

Model	Per session	Once invoked
Fable 5.1	$0.00181	$0.00181
Opus 5.5	$0.00072	$0.00072
Sonnet 5.5	$0.00036	$0.00036
Haiku 4.5	$0.00018	$0.00018

Measured yesterday against content hash 410bd54ef17a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

diffuse 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 yesterday.

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.

.cursor/rules/diffuse.mdc · 21 lines

What it actually says

Read AGENTS.md in the repository root before editing. Product docs: Documentation/README.md.

Diffuse is local-first. Four native Apple apps share a capability-driven domain engine. No cloud, no account, no telemetry, no third-party Swift packages, no signing identities in the tree.

Apps → DiffuseUI → DiffuseCapabilities / DiffuseCore → DiffuseModels
                                                     → DiffuseDiff
                                                     → DiffuseStorage

Adding a capability must not require edits to the diff engine, store, search, export, or app screens. See Documentation/CapabilityGuide.md.

Verify with ./Scripts/format.sh and swift test. Full health check: ./Scripts/verify.sh.

Do not add CodeQL or noisy static scanners.

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.

yesterday First seen · 21 lines · 181 tokens per session scan A 410bd54ef17a

Subscribe to this mod's changes

diffuse is a cursor rule published in the GitHub repository hoangsonww/Diffuse-Native-Apps (11 stars, last pushed 1mo ago), licensed MIT. It adds 181 tokens to every session, about $0.0007 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 2026-11-07.

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diffuse next to 6 cursor rules from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
diffusehoangsonww/Diffuse-Native-Apps	Cursor rule	11	1mo ago	MIT	A	181	Cursor
compose-coroutinesbaijum/ukulele-companion	Cursor rule	14	2d ago	MIT	A	0	Cursor
android-viewmodelbaijum/ukulele-companion	Cursor rule	14	2d ago	MIT	A	0	Cursor
edge_to_edgebaijum/ukulele-companion	Cursor rule	14	2d ago	MIT	A	0	Cursor
swiftui-accessibilitybaijum/ukulele-companion	Cursor rule	14	2d ago	MIT	A	0	Cursor
react-native-debugger-mcpUM-ARK/UM-All-Frontend	Cursor rule	20	11d ago	none	A	16	Cursor
storage-rulesUM-ARK/UM-All-Frontend	Cursor rule	20	11d ago	none	A	0	Cursor