Borrowing it
Nothing to install: this file belongs to terrene-foundation/metis. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/terrene-foundation/metis/main/.claude/skills/13-architecture-decisions/SKILL.mdgit clone --depth 1 https://github.com/terrene-foundation/metisWrote 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/terrene-foundation/metis/13-architecture-decisions)<a href="https://agentmods.dev/skills/terrene-foundation/metis/13-architecture-decisions"><img src="https://agentmods.dev/badge/skills/terrene-foundation/metis/13-architecture-decisions/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/terrene-foundation/metis/13-architecture-decisions"><img src="https://agentmods.dev/badge/skills/terrene-foundation/metis/13-architecture-decisions.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 | $0.00111 | $0.00954 |
| Opus 5 | $0.00056 | $0.00477 |
| Sonnet 5 | $0.00022 | $0.00191 |
| Haiku 4.5 | $0.00011 | $0.00095 |
Grade A, and why
architecture-decisions 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 11d 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 — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Kailash Architecture Decisions
Decision guides for selecting the right frameworks, runtimes, databases, nodes, and testing strategies.
Reference Documentation
| Decision | File | Quick Answer |
|---|---|---|
| Framework | decide-framework | Core SDK (custom), DataFlow (DB), Nexus (multi-channel), Kaizen (AI agents) |
| Runtime | decide-runtime | Docker/async -> AsyncLocalRuntime; CLI/Scripts -> LocalRuntime |
| Database | decide-database-postgresql-sqlite | Production -> PostgreSQL; Dev/Test -> SQLite |
| Node | decide-node-for-task | See node selection flow below |
| Test Tier | decide-test-tier | Unit (fast), Integration (real infra), E2E (full system) |
Framework Selection Matrix
| Need | Framework | Why |
|---|---|---|
| Custom workflows | Core SDK | Full control, 140+ nodes |
| Database CRUD | DataFlow | Auto-generated nodes |
| Multi-channel API | Nexus | API + CLI + MCP instantly |
| AI agents | Kaizen | Signature-based agents |
| All of above | Combine them | They work together |
Runtime Selection Flow
Deploying to Docker/async/Kubernetes?
YES -> AsyncLocalRuntime (async-first, no threads)
NO -> CLI/script?
YES -> LocalRuntime (sync execution)
NO -> Use get_runtime() for auto-detection
What ships with it
8 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.
- 11d ago First seen · 101 lines · 111 tokens per session scan A 07d7ef8fba49
architecture-decisions is a skill published in the GitHub repository terrene-foundation/metis (2 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 111 tokens to every session and 954 once invoked, about $0.0006 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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