tmcp-architecture-decision

tmcp-architecture-decision is a skill for Claude Code, Codex from jakyeamos/tmcp. It costs 32 tokens per session (289 once invoked), scanned A, original, MIT.

A workflow for reviewing software architecture choices, written design decisions, alternatives, constraints, and trade-offs.

In plain words
What is it for?
Use it to compare libraries, platforms, boundaries, design patterns, or migration approaches and produce a reviewed decision plan.
Why use it?
It makes the reasoning and risks behind a technical choice explicit before implementation begins.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is node scripts/tmcp_launcher.mjs review-plan "Review this architecture decision for <project>" --project-path "<project-path>" --evidence-json '<json>' --write-ar.

Part of the tmcp plugin — 20 skills, 1 MCP server shipped together

Good fit Use it to compare libraries, platforms, boundaries, design patterns, or migration approaches and produce a reviewed decision plan.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/jakyeamos/tmcp
agentmods
npx agentmods add skills/jakyeamos/tmcp/tmcp-architecture-decision

Made for: Claude Code, Codex.

Or install tmcp, the plugin that ships this one along with the rest of its 20 skills, 1 MCP server.

Wrote 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.

agentmods badge for tmcp-architecture-decision

README.md
[![agentmods](https://agentmods.dev/badge/skills/jakyeamos/tmcp/tmcp-architecture-decision/github.svg)](https://agentmods.dev/skills/jakyeamos/tmcp/tmcp-architecture-decision)
Your own site
<a href="https://agentmods.dev/skills/jakyeamos/tmcp/tmcp-architecture-decision"><img src="https://agentmods.dev/badge/skills/jakyeamos/tmcp/tmcp-architecture-decision/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.

agentmods 80×15 button for tmcp-architecture-decision

Your own site · 80×15
<a href="https://agentmods.dev/skills/jakyeamos/tmcp/tmcp-architecture-decision"><img src="https://agentmods.dev/badge/skills/jakyeamos/tmcp/tmcp-architecture-decision.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 289 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00032 $0.00289
Opus 5 $0.00016 $0.00144
Sonnet 5 $0.00006 $0.00058
Haiku 4.5 $0.00003 $0.00029

Measured 10d ago against content hash 42c5b59f463b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

tmcp-architecture-decision 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 10d 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.

skills/tmcp-architecture-decision/SKILL.md · 35 lines

What it actually says

TMCP Architecture Decision

Status: experimental. This workflow remains shipped and callable, but its public contract may change.

Use this skill when the user asks whether to use an architecture, library, platform, design pattern, boundary, or migration approach, or when they ask for an ADR/design-decision review.

Do not use it for immediate implementation unless the user has already approved the decision.

Workflow

  1. Gather evidence: current architecture, constraints, repo patterns, alternatives, migration cost, compatibility concerns, and verification expectations.
  2. Invoke tmcp_explain for the decision-specific packet.
  3. Invoke expert_rubric_review_plan to score source grounding, risk priority, verification readiness, and scope control.
  4. If MCP tools are unavailable, run from the TMCP plugin root:
node scripts/tmcp_launcher.mjs review-plan "Review this architecture decision for <project>" --project-path "<project-path>" --evidence-json '<json>' --write-artifacts

Output Contract

Produce or cite:

  • TMCP packet and substance_check.
  • Decision context and constraints.
  • Alternatives considered.
  • Tradeoff and migration-cost audit.
  • Recommended ADR outcome.
Changes

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.

  1. 10d ago First seen · 35 lines · 32 tokens per session scan A 42c5b59f463b

Subscribe to this mod's changes

tmcp-architecture-decision is a skill published in the GitHub repository jakyeamos/tmcp (0 stars, last pushed today), licensed MIT. It adds 32 tokens to every session and 289 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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