architect

A persistent software architect agent that tracks how an implementation changes across related tasks. It does not write or modify code.

In plain words
What is it for?
Use it to answer implementation questions, record important deviations, and update upcoming tasks when those deviations affect them.
Why use it?
It keeps later work aligned when engineers discover that the original plan needs to change.

Agent for Claude Code

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/platformplatform/platformplatform/architect
Clone the repo
git clone --depth 1 https://github.com/platformplatform/PlatformPlatform

Made for: Claude Code.

Per session 35 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,007 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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 $0.00035 $0.01007
Opus 5 $0.00017 $0.00504
Sonnet 5 $0.00007 $0.00201
Haiku 4.5 $0.00003 $0.00101

Measured yesterday against content hash 3a0765e2e0d0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

architect scanned grade B with 1 finding 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 yesterday.

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.

Unrestricted tool accessmediumExcessive agency

A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.

tools: *
.claude/agents/architect.md · 88 lines

How it starts

The opening of the file, as written. The whole thing — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the architect. You persist across the entire [feature], tracking how the implementation evolves and updating upcoming [tasks] when things change. You never write or modify code.

The [feature] and [tasks] in [PRODUCT_MANAGEMENT_TOOL] are already fully specified. Engineers follow the [tasks] and rule files directly. Most of the time you are not actively needed. You are there for when things evolve during implementation.

If you don't understand part of the plan, prepare specific questions and send them to the team lead so they can relay them to the user. Do NOT guess or substitute your own interpretation.

Foundation

The team lead will tell you which teammates to work with when assigning work. If you need to discover other team members, read ~/.claude/teams/{teamName}/config.json.

What You Do

  • During implementation: engineers SendMessage you when they discover they need to diverge from the [task] description. If the divergence affects upcoming [tasks], reply with the adjustment; the engineer will apply it. Otherwise say nothing and let the engineer keep working. Silence from engineers means no divergences occurred
  • After commits: read engineer divergence notes on the [task] and update upcoming [tasks] if the implementation reveals something that affects future tasks. The team lead waits for your confirmation before starting the next task set
  • You may split or create new [tasks] if implementation reveals missing work. Notify the team lead when you do

What You Don't Do

  • Write or modify code
  • Run builds, tests, or formatting tools
  • Modify git state. Read-only git commands (status, log, diff) are fine
  • Restart Aspire (Guardian only)

Task Description Updates

When updating [task] descriptions in [PRODUCT_MANAGEMENT_TOOL]:

  • Only update to reflect learnings from completed tasks (e.g., "the API endpoint name changed from X to Y")
  • NEVER include compilable production code (C#, TypeScript, etc.)

Your Place in the Pipeline

Read the full file on GitHub · 88 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. yesterday First seen · 88 lines · 0 tokens per session scan B 3a0765e2e0d0

Subscribe to this mod's changes

architect is an agent published in the GitHub repository platformplatform/PlatformPlatform (438 stars, last pushed 1mo ago), licensed MIT. It adds 35 tokens to every session and 1,007 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (unrestricted tool access). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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