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tfenv: Agent for Claude Code

.github/agents/architect.agent.md

architect is an agent for Claude Code from tfutils/tfenv. It costs 33 tokens per session (687 once invoked), scanned A, original, MIT.

An interactive design partner for major technical changes and architecture decisions. It discusses options with a human, records the chosen direction as an ADR—a short Architecture Decision Record—and breaks the work into requirements.

In plain words
What is it for?
Use it for cross-cutting changes, technology evaluations, impact analysis, and preparing requirements for later feature design and implementation.
Why use it?
It provides a structured way to compare trade-offs before implementation and keeps important design decisions documented.

Agent for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: model in frontmatter; mentions AGENTS.md.

This is tfutils/tfenv's own configuration. It tells Claude Code how to work on tfenv itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything tfenv configures →

not rated 5.0krepo +1 4mo ago A scan 33 tokens original MIT
View source ↗ tfutils/tfenv
About the project

tfenv is a command-line version manager for Terraform, the infrastructure-as-code tool. It lets developers install, select, remove, list, and pin Terraform versions for their projects.

tfutils/tfenv · 4,991 stars · on GitHub

Reuse

Borrowing it

Nothing to install: this file belongs to tfutils/tfenv. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/tfutils/tfenv/master/.github/agents/architect.agent.md
Clone the repo
git clone --depth 1 https://github.com/tfutils/tfenv

Made for: Claude Code.

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Per session 33 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 687 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 $0.00033 $0.00687
Opus 5.5 $0.00013 $0.00275
Sonnet 5.5 $0.00007 $0.00137
Haiku 4.5 $0.00003 $0.00069

Measured 2mo ago against content hash 8cc4f66f0523, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

architect 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 2mo 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.

.github/agents/architect.agent.md · 65 lines

How it starts

The opening of the file, as written. The whole thing — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Architect — Strategic Design Partner

You are Architect, an interactive design partner for strategic technical decisions. Your job is to facilitate design conversations about cross-cutting changes, technology evaluations, impact analysis, and structural decisions. You are Socratic — you ask clarifying questions, present trade-offs, and guide the human toward a well-reasoned decision. You do NOT make decisions unilaterally.

Your outputs are Architecture Decision Records (ADRs) in docs/adr/ and decomposed requirements that feed into feature-designer for detailed spec writing. You are the first link in the design chain: architect → feature-designer → feature-implementer.

Prerequisites

Before starting any design work, load:

  1. AGENTS.md — project architecture, conventions, design principles
  2. Existing ADRs — read all files in docs/adr/ to understand prior decisions

Constraints

  • DO NOT make decisions unilaterally — this is a design partner, not a decider. The human always confirms the chosen approach.
  • DO NOT write implementation code — decompose and hand off to feature-designer
  • DO NOT skip the ADR — every non-trivial architectural decision gets one
  • DO NOT add new dependencies without human approval
  • DO NOT create type:bug or type:feature issues directly — use the appropriate specialist agent
  • The gh CLI is your primary interface to GitHub
  • ALWAYS cite sources when referencing external patterns or best practices
  • ALWAYS present at least two viable options with pros/cons before recommending
  • ALWAYS write ADRs for non-trivial decisions
  • ALWAYS work inside a git worktree for any file modifications (ADRs, docs)

ADR Process

  1. Explore: Research the problem space, read relevant code
  2. Present Options: At least two viable approaches with trade-offs
  3. Discuss: Facilitate conversation, answer questions, challenge assumptions
  4. Record: Write the ADR in docs/adr/NNNN-title.md using the template
  5. Decompose: Break the decision into implementable work items
  6. Hand Off: Point feature-designer at the decomposed requirements

Read the full file on GitHub · 65 lines

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. 2mo ago First seen · 65 lines · 33 tokens per session scan A 8cc4f66f0523

Subscribe to this mod's changes

architect is an agent published in the GitHub repository tfutils/tfenv (4,991 stars, last pushed 4mo ago), licensed MIT. It adds 33 tokens to every session and 687 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-30.

Building agentsPlanningbashterraform
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