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.
npx skills add jamon8888/hacienda-private --skill plugin-architecture-patternsgit clone --depth 1 https://github.com/jamon8888/hacienda-privateWrote 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.
[](https://agentmods.dev/skills/jamon8888/hacienda-private/plugin-architecture-patterns)<a href="https://agentmods.dev/skills/jamon8888/hacienda-private/plugin-architecture-patterns"><img src="https://agentmods.dev/badge/skills/jamon8888/hacienda-private/plugin-architecture-patterns.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00014 | $0.00722 |
| Opus 5 | $0.00007 | $0.00361 |
| Sonnet 5 | $0.00003 | $0.00144 |
| Haiku 4.5 | $0.00001 | $0.00072 |
Grade A, and why
plugin-architecture-patterns 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 7d 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.
This is a copy
91% identical to plugin-architecture-patterns — 33 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.
How it starts
The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Plugin Architecture & Registration
Plugin Types
| Type | Trait | Location |
|---|---|---|
| Document Extractor | DocumentExtractor: Plugin |
plugins/extractor/trait.rs |
| OCR Backend | OcrBackend: Plugin |
plugins/ocr/trait.rs |
| Post Processor | PostProcessor: Plugin |
plugins/processor/trait.rs |
| Validator | Validator: Plugin |
plugins/validator/trait.rs |
DocumentExtractor Implementation
use crate::plugins::{DocumentExtractor, Plugin};
use async_trait::async_trait;
pub struct MyExtractor;
impl Plugin for MyExtractor {
fn name(&self) -> &str { "my-extractor" }
fn version(&self) -> String { env!("CARGO_PKG_VERSION").to_string() }
}
#[async_trait]
impl DocumentExtractor for MyExtractor {
async fn extract(&self, input: ExtractInput, config: &ExtractionConfig)
-> Result<ExtractedDocument> { /* ... */ }
fn supported_mime_types(&self) -> &[&str] { &["application/x-custom"] }
fn priority(&self) -> i32 { 50 }
// WASM support (optional)
fn as_sync_extractor(&self) -> Option<&dyn SyncExtractor> { None }
}
Priority System
| Range | Use |
|---|---|
| 0-25 | Fallback/low-quality |
| 26-49 | Alternative extractors |
| 50 | Default (built-in) |
| 51-75 | Premium/enhanced |
| 76-100 | Specialized/high-priority |
Registry selects highest priority extractor for each MIME type. Override built-ins with priority > 50.
Registration
// In extractors/mod.rs → register_default_extractors()
let registry = get_document_extractor_registry();
let mut registry = registry.write()
.map_err(|e| XbergError::Other(format!("Registry lock poisoned: {}", e)))?;
registry.register(Arc::new(MyExtractor::new()))?;
Feature-Gated Registration
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.
- 7d ago First seen · 98 lines · 14 tokens per session scan A 922758c8719f
plugin-architecture-patterns is a skill published in the GitHub repository jamon8888/hacienda-private (0 stars, last pushed 1mo ago), licensed MIT. It adds 14 tokens to every session and 722 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 91% identical to plugin-architecture-patterns, differing in 33 lines, and is treated as a copy.
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