element-parser-edge-cases

Parser rules and tests for handling unusual element syntax in the Dart Structurizr parser. Structurizr is a tool and language for describing software architecture diagrams.

In plain words
What is it for?
Use them when maintaining or testing element parsing, especially for compatibility with Structurizr DSL input and edge-case behavior.
Why use it?
They prevent valid empty, malformed, nested, or block-based elements from being rejected, while still reporting inline elements with too many relevant header tokens.

Cursor rule for Cursor

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/consiliency/flutter-structurizr/element-parser-edge-cases
Clone the repo
git clone --depth 1 https://github.com/Consiliency/Flutter-Structurizr

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 179 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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00179
Opus 5 $0.00000 $0.00089
Sonnet 5 $0.00000 $0.00036
Haiku 4.5 $0.00000 $0.00018

Measured 2d ago against content hash 3a9021b12c60, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

element-parser-edge-cases 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 2d 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/element-parser-edge-cases.mdc · 11 lines

What it actually says

Element Parser Edge Case Handling

The Dart Structurizr parser robustly handles edge cases for element parsing, ensuring compatibility with the Structurizr DSL. The parser only throws a 'too many tokens' error for inline elements (i.e., those without a block) when there are more than 4 relevant header tokens (the keyword and up to three strings for name, description, and tags). Block-based elements and valid edge cases—such as empty descriptions, empty or malformed tags, and nested elements—are accepted and parsed correctly.

All edge case tests are located in test/domain/parser/element_parser_edge_cases_test.dart, and the parser logic is implemented in lib/domain/parser/element_parser.dart.

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. 2d ago First seen · 11 lines · 0 tokens per session scan A 3a9021b12c60

Subscribe to this mod's changes

element-parser-edge-cases is a cursor rule published in the GitHub repository Consiliency/Flutter-Structurizr (7 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 179 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.