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 SecondLifes/delphi-expert --skill design-patternsgit clone --depth 1 https://github.com/SecondLifes/delphi-expertWrote 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/secondlifes/delphi-expert/design-patterns)<a href="https://agentmods.dev/skills/secondlifes/delphi-expert/design-patterns"><img src="https://agentmods.dev/badge/skills/secondlifes/delphi-expert/design-patterns/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.
<a href="https://agentmods.dev/skills/secondlifes/delphi-expert/design-patterns"><img src="https://agentmods.dev/badge/skills/secondlifes/delphi-expert/design-patterns.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00044 | $0.00696 |
| Opus 5.5 | $0.00018 | $0.00278 |
| Sonnet 5.5 | $0.00009 | $0.00139 |
| Haiku 4.5 | $0.00004 | $0.00070 |
Grade A, and why
design-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 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.
How it starts
The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design Patterns GoF in Delphi — Skill
Use this skill when the user requests implementation of design patterns in Delphi. Always apply together with naming conventions (T/I/E/F/A/L) and memory management (try..finally).
When to Use
- Create
Factory,Abstract FactoryorBuilderfor creating complex objects - Implement
Strategyto vary algorithms (calculation of freight, taxes, export) - Use
Observerfor decoupled notifications (Domain Events) - Apply
Commandfor undo/redo, job queues or auditing - Use
Decoratorto add responsibilities without inheritance - Implement
Adapterfor integration with legacy systems - Use
Facadeto simplify complex subsystems (e.g. NFe emission) - Apply
Template Methodto algorithms with variations (reports, exports) - Use
Statefor behavior that changes depending on the state of the object - Use
Chain of Responsibilityfor validation or processing pipelines
📌 Guide to Choosing the Right Pattern
| Need | Standard | Category |
|---|---|---|
| Create objects with type variation | Factory Method / Abstract Factory | Creational |
| Create complex objects step by step | Builder | Creational |
| Ensure Global Single Instance | Singleton | Creational |
| Copy objects | Prototype | Creational |
| Adapt incompatible interface | Adapter | Structural |
| Add responsibilities dynamically | Decorator | Structural |
| Simplify complex system | Facade | Structural |
| Control access to an object | Proxy | Structural |
| Compose objects in tree structure | Composite | Structural |
| Vary algorithm without changing context | Strategy | Behavioral |
| Notify multiple objects about changes | Observer | Behavioral |
| Encapsulate actions with undo/redo | Command | Behavioral |
| Algorithm with variations | Template Method | Behavioral |
| Pass request through handler chain | Chain of Responsibility | Behavioral |
| Behavior that changes with the state | State | Behavioral |
Full implementation and code for each pattern is in the reference files below — read the one matching the category the task needs rather than guessing.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 · 62 lines · 44 tokens per session scan A bd4286cbd2ef
design-patterns is a skill published in the GitHub repository SecondLifes/delphi-expert (3 stars, last pushed 1mo ago), licensed MIT. It adds 44 tokens to every session and 696 once invoked, about $0.0002 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 2026-08-31.
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