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 kumaran-is/claude-code-onboarding --skill architecture-decision-recordsgit clone --depth 1 https://github.com/kumaran-is/claude-code-onboardingWrote 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/kumaran-is/claude-code-onboarding/architecture-decision-records)<a href="https://agentmods.dev/skills/kumaran-is/claude-code-onboarding/architecture-decision-records"><img src="https://agentmods.dev/badge/skills/kumaran-is/claude-code-onboarding/architecture-decision-records/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/kumaran-is/claude-code-onboarding/architecture-decision-records"><img src="https://agentmods.dev/badge/skills/kumaran-is/claude-code-onboarding/architecture-decision-records.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 | $0.00067 | $0.01599 |
| Opus 5 | $0.00034 | $0.00800 |
| Sonnet 5 | $0.00013 | $0.00320 |
| Haiku 4.5 | $0.00007 | $0.00160 |
Grade A, and why
architecture-decision-records 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.
How it starts
The opening of the file, as written. The whole thing — 184 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Iron Law: Every significant technical decision must produce an ADR before implementation begins; never let irreversible decisions proceed without a documented record.
Architecture Decision Records
Capture the context and rationale behind significant technical decisions using structured ADR formats.
When to Use This Skill
| Write ADR | Skip ADR |
|---|---|
| New framework adoption | Minor version upgrades |
| Database technology choice | Bug fixes |
| API design patterns | Implementation details |
| Security architecture | Routine maintenance |
| Integration patterns | Configuration changes |
Implicit Trigger Detection
Recognize these conversation patterns as ADR signals — ask "Should we document this as an ADR?" before proceeding:
| Signal Pattern | Example | ADR Category |
|---|---|---|
| "I need X for Y" | "I need a message queue for async jobs" | Technology choice |
| "Should we use X or Y?" | "Should we use Kafka or BullMQ?" | Technology choice |
| "We're switching from X to Y" | "Moving from REST to GraphQL for..." | Architecture pattern |
| "How should we structure X?" | "How should we structure our auth layer?" | Architecture pattern |
| "We decided to use X" | "We're going with Prisma for the ORM" | Technology choice |
| "X isn't scaling, we need to Y" | "Our monolith isn't scaling, thinking microservices" | Architecture pattern |
| Adding a new external service | Integrating Stripe, adding Firebase Auth | Infrastructure |
| Changing data model significantly | "Users now need multi-tenant support" | Data modeling |
Rule: If the decision affects more than one service, involves a new dependency, or cannot easily be reversed — it needs an ADR.
Quick Start
- Copy the template:
cp docs/adr/template.md docs/adr/NNNN-your-title.md - Fill in: Context, Decision Drivers, Options, Decision, Consequences
- PR for review (2+ senior engineers)
- Update
docs/adr/README.mdindex after merge
What ships with it
4 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.
- 7d ago First seen · 184 lines · 67 tokens per session scan A c7d82267d8d7
architecture-decision-records is a skill published in the GitHub repository kumaran-is/claude-code-onboarding (35 stars, last pushed 2mo ago), licensed MIT. It adds 67 tokens to every session and 1,599 once invoked, about $0.0003 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 2026-09-03.
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