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 divyanshu-iitian/agent-website-design-skills --skill production-web-architecturegit clone --depth 1 https://github.com/divyanshu-iitian/agent-website-design-skillsWrote 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/divyanshu-iitian/agent-website-design-skills/production-web-architecture)<a href="https://agentmods.dev/skills/divyanshu-iitian/agent-website-design-skills/production-web-architecture"><img src="https://agentmods.dev/badge/skills/divyanshu-iitian/agent-website-design-skills/production-web-architecture/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/divyanshu-iitian/agent-website-design-skills/production-web-architecture"><img src="https://agentmods.dev/badge/skills/divyanshu-iitian/agent-website-design-skills/production-web-architecture.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 | $0.00049 | $0.00559 |
| Opus 5 | $0.00024 | $0.00280 |
| Sonnet 5 | $0.00010 | $0.00112 |
| Haiku 4.5 | $0.00005 | $0.00056 |
Grade A, and why
production-web-architecture 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 12d 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 — 45 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Production Web Architecture
Turn product flows into an operable system. Prefer the smallest architecture that removes the largest demonstrated risk.
Workflow
- Map users, critical journeys, trust boundaries, data ownership, external services, files, asynchronous work, and failure consequences.
- State workload assumptions and service objectives: traffic shape, latency, availability, durability, freshness, privacy, and cost.
- Trace each critical path from browser through API, storage, queue, worker, and response. Mark transaction and idempotency boundaries.
- Review scalability, reliability, security, data integrity, performance, observability, deployment, and cost.
- Keep a modular monolith until independent scaling, ownership, deployment, or fault isolation creates a measurable extraction benefit.
- Move slow or fragile work behind durable queues. Make handlers idempotent, retryable, observable, and visible to users.
- Add caches only with ownership, key design, TTL, invalidation, stampede protection, and stale behavior defined.
- Define migrations, rollout, rollback, health checks, alerts, runbooks, and cost guardrails before calling the design production-ready.
- Validate the highest-risk flow with a failure test, load test, or end-to-end smoke test proportional to the risk.
Startup Defaults
- Managed relational database, object storage, queue, cache, and observability before custom distributed systems.
- Server-side authorization at every ownership boundary.
- Timeouts, pagination, rate limits, and idempotency keys on relevant APIs.
- Structured logs, trace or request IDs, service metrics, and actionable alerts.
- AI calls use structured output, provider routing, token ceilings, prompt versions, and bounded retries.
- Public reads degrade gracefully; writes fail explicitly rather than silently losing data.
Delivery Contract
Provide:
- System map - components, data, trust boundaries, and critical paths.
- Assumptions and SLOs - explicit numbers or identified unknowns.
- Findings - severity, evidence, failure mode, and affected journey.
- Target architecture - smallest justified change and deferred complexity.
- Execution plan - schema, API, queue, migration, rollout, and ownership tasks.
- Verification and operations - tests, dashboards, alerts, rollback, and cost controls.
What ships with it
2 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.
- 12d ago First seen · 45 lines · 49 tokens per session scan A 91c7700dee7e
production-web-architecture is a skill published in the GitHub repository divyanshu-iitian/agent-website-design-skills (2 stars, last pushed 21d ago), licensed MIT. It adds 49 tokens to every session and 559 once invoked, about $0.0002 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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