A set of coding rules for C++ projects, including guidance on who owns and manages resources.

Use it when writing or reviewing C++ code, especially when deciding how objects and resources should be managed.

It gives C++ code a consistent style and makes ownership boundaries easier to understand and review.

cpp — Cursor rule by configflux

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.

agentmods

npx agentmods add rules/configflux/weld/cpp

Clone the repo

git clone --depth 1 https://github.com/configflux/weld

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.

When invoked 48 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

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	$0.00000	$0.00048
Opus 5	$0.00000	$0.00024
Sonnet 5	$0.00000	$0.00010
Haiku 4.5	$0.00000	$0.00005

Measured yesterday against content hash a1a97648e769, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

cpp 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.

examples/agent-graph-demo/.cursor/rules/cpp.mdc · 10 lines

What it actually says

Prefer explicit ownership boundaries.

See @docs/architecture/principles.md for cross-language guidance.

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 · 10 lines · 0 tokens per session scan A a1a97648e769

Subscribe to this mod's changes

cpp is a cursor rule published in the GitHub repository configflux/weld (6 stars, last pushed 2d ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 48 tokens. 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.

Data and AI Writing and docs ai-agents ast claude-code code-intelligence codebase-analysis developer-tools

cpp

Getting it into your agent

What it costs to keep this loaded

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

Other cursor rules, from other repositories

agents-first-convention

architecture-priming

authoring-discipline

plan-pr-inspiration-discipline

pr-comment-fact-check

verify-after-each-step