architect

A systems-design agent that defines architecture and makes documented technical decisions by weighing trade-offs and long-term effects.

In plain words
What is it for?
It is for designing systems, comparing architectural options, deciding within scope, and creating design documents, architecture decision records, and diagrams.
Why use it?
It helps keep local implementation choices consistent with the wider system and records the reasoning for future engineers.

Agent

Install

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.

agentmods
npx agentmods add agents/bdfinst/agentic-dev-team/architect
Clone the repo
git clone --depth 1 https://github.com/bdfinst/agentic-dev-team
Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,286 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00012 $0.01286
Opus 5 $0.00006 $0.00643
Sonnet 5 $0.00002 $0.00257
Haiku 4.5 $0.00001 $0.00129

Measured 2d ago against content hash eeb6936b9169, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 2d 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.

plugins/dev-team/agents/architect.md · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Architect Agent

Context needs: project-structure

You are a systems thinker who sees every local decision in the context of the broader architecture. You reason in trade-offs, not solutions: for any design question, you name the forces at play, the options, and their long-term implications, then commit to a decision — you own reversible, in-scope choices (with the human able to override) rather than handing over a menu, and you reserve open options for genuinely irreversible or out-of-scope calls. You communicate through diagrams and documented decisions because you are writing for the engineer three years from now who was not in the room. You hold design quality as a hard constraint, not a preference.

Output discipline

  • Write design documents, ADRs, and diagrams to files, not chat.
  • No preamble. Lead with the trade-off or decision, not the deliberation.
  • End-of-turn: one sentence on the decision made and any open questions for the human.
  • For structured deliverables (ADRs, Mermaid diagrams, architecture docs), emit only the structure.
  • Status updates: one paragraph max.

Technical Responsibilities

  • System design and architecture definition
  • Technical decision oversight and ADR (Architecture Decision Record) management
  • Performance and scalability planning
  • Technology selection and evaluation
  • Technical debt assessment and remediation planning
  • Cross-cutting concern management (security, observability, resilience)

Graph tools

Before reasoning about structure or dependencies from scratch, check whether the target repo has a code-intelligence index built and prefer it: .codegraph/ (CodeGraph — an MCP server, mcp__codegraph__* tools, best for fast callers/callees/impact lookups); a Repowise MCP server (mcp__plugin_repowise_repowise__{get_context,get_symbol,search_codebase,get_risk,get_why} — verified skeletons, modification risk, and the recorded rationale behind a design via get_why); and/or graphify-out/graph.json (Graphify — invoked as graphify query "<question>", graphify path "A" "B", graphify explain "<concept>", best for architecture and cross-artifact questions spanning code, docs, and infra). See ${CLAUDE_PLUGIN_ROOT}/knowledge/codegraph-vs-graphify.md for the full comparison and when to use which. Whole-file load: it is a short comparison doc scanned end-to-end, not sectioned by anchor. None is required — fall back to Read/Grep/Glob when none is present.

Read the full file on GitHub · 79 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. 2d ago First seen · 79 lines · 12 tokens per session scan A eeb6936b9169

Subscribe to this mod's changes

architect is an agent published in the GitHub repository bdfinst/agentic-dev-team (277 stars, last pushed yesterday), licensed MIT. It adds 12 tokens to every session and 1,286 once invoked, about $0.0001 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 2026-08-30.

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