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 agentmods add skills/beel-collab/presets.dev/domain-driven-designnpx skills add beel-collab/presets.dev --skill domain-driven-designgit clone --depth 1 https://github.com/beel-collab/presets.devWrote 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/beel-collab/presets.dev/domain-driven-design)<a href="https://agentmods.dev/skills/beel-collab/presets.dev/domain-driven-design"><img src="https://agentmods.dev/badge/skills/beel-collab/presets.dev/domain-driven-design.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 | $0.00020 | $0.00532 |
| Opus 5 | $0.00010 | $0.00266 |
| Sonnet 5 | $0.00004 | $0.00106 |
| Haiku 4.5 | $0.00002 | $0.00053 |
Grade A, and why
domain-driven-design 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 3d 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 — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Domain-Driven Design
Use this skill when
- You need to model a complex business domain with explicit boundaries.
- You want to decide whether full DDD is worth the added complexity.
- You need to connect strategic design decisions to implementation patterns.
- You are planning CQRS, event sourcing, sagas, or projections from domain needs.
Do not use this skill when
- The problem is simple CRUD with low business complexity.
- You only need localized bug fixes.
- There is no access to domain knowledge and no proxy product expert.
Instructions
- Run a viability check before committing to full DDD.
- Produce strategic artifacts first: subdomains, bounded contexts, language glossary.
- Route to specialized skills based on current task.
- Define success criteria and evidence for each stage.
Viability check
Use full DDD only when at least two of these are true:
- Business rules are complex or fast-changing.
- Multiple teams are causing model collisions.
- Integration contracts are unstable.
- Auditability and explicit invariants are critical.
Routing map
- Strategic model and boundaries:
@ddd-strategic-design - Cross-context integrations and translation:
@ddd-context-mapping - Tactical code modeling:
@ddd-tactical-patterns - Read/write separation:
@cqrs-implementation - Event history as source of truth:
@event-sourcing-architectand@event-store-design - Long-running workflows:
@saga-orchestration - Read models:
@projection-patterns - Decision log:
@architecture-decision-records
If templates are needed, open references/ddd-deliverables.md.
Output requirements
Always return:
- Scope and assumptions
- Current stage (strategic, tactical, or evented)
- Explicit artifacts produced
- Open risks and next step recommendation
Examples
Use @domain-driven-design to assess if this billing platform should adopt full DDD.
Then route to the right next skill and list artifacts we must produce this week.
Limitations
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.
- 3d ago First seen · 75 lines · 20 tokens per session scan A 671b703658c7
domain-driven-design is a skill published in the GitHub repository beel-collab/presets.dev (2 stars, last pushed 3mo ago), licensed MIT. It adds 20 tokens to every session and 532 once invoked, about $0.0001 per session on Opus 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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