What is safe-file-transforms?

Rules for safely changing TypeScript and TSX files during automated file transformations.

Use them when editing transformation code such as fix.ts: validate syntax with safeWrite, track changed files, log caught errors, and regenerate components instead of patching them with regular expressions.

They reduce the risk of writing invalid code, losing the original file after a failed change, or hiding errors in empty catch blocks.

safe-file-transforms — Cursor rule for Cursor by skovtun

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/skovtun/coherent-design-method

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/skovtun/coherent-design-method/safe-file-transforms/github.svg)](https://agentmods.dev/rules/skovtun/coherent-design-method/safe-file-transforms)

Your own site

<a href="https://agentmods.dev/rules/skovtun/coherent-design-method/safe-file-transforms"><img src="https://agentmods.dev/badge/rules/skovtun/coherent-design-method/safe-file-transforms/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/skovtun/coherent-design-method/safe-file-transforms"><img src="https://agentmods.dev/badge/rules/skovtun/coherent-design-method/safe-file-transforms.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

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

When invoked 135 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.

Model	Per session	Once invoked
Fable 5.1	$0.00000	$0.00135
Opus 5.5	$0.00000	$0.00054
Sonnet 5.5	$0.00000	$0.00027
Haiku 4.5	$0.00000	$0.00014

Measured 1mo ago against content hash 7541e0552496, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

safe-file-transforms 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 1mo 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.

.cursor/rules/safe-file-transforms.mdc · 16 lines

What it actually says

Safe File Transforms

When modifying fix.ts or adding new file transformations:

Use safeWrite() from ./fix-validation.js instead of writeFileSync for all TSX/TS file writes
safeWrite validates TSX syntax after writing and rolls back on failure
Track modified files in modifiedFiles array for post-transform verification
Never add empty catch {} blocks — always log with chalk.yellow
Prefer full component regeneration over regex-based patching

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.

1mo ago First seen · 16 lines · 0 tokens per session scan A 7541e0552496

Subscribe to this mod's changes

safe-file-transforms is a cursor rule published in the GitHub repository skovtun/coherent-design-method (21 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 135 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 2026-08-30.

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safe-file-transforms