solution-architect

solution-architect is an agent for Claude Code from 10Legs/freelance-developer-harness. It costs 48 tokens per session (660 once invoked), scanned A, original, MIT.

A solution-architecture agent that designs the technical structure of new software systems and records the reasoning behind major choices. It covers areas such as APIs, cloud systems, data, and frontend architecture.

In plain words
What is it for?
Use it to analyze requirements, propose architectures, create decision records, assess feasibility, and review implementation plans for architectural fit.
Why use it?
It helps teams compare feasible approaches and resolve technical direction before implementation begins, including constraints, trade-offs, and security concerns.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

Good fit Use it to analyze requirements, propose architectures, create decision records, assess feasibility, and review implementation plans for architectural fit.

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Install with agentmods
npx agentmods add agents/10legs/freelance-developer-harness/solution-architect
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.

Clone the repo
git clone --depth 1 https://github.com/10Legs/freelance-developer-harness

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Your own site
<a href="https://agentmods.dev/agents/10legs/freelance-developer-harness/solution-architect"><img src="https://agentmods.dev/badge/agents/10legs/freelance-developer-harness/solution-architect/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 solution-architect

Your own site · 80×15
<a href="https://agentmods.dev/agents/10legs/freelance-developer-harness/solution-architect"><img src="https://agentmods.dev/badge/agents/10legs/freelance-developer-harness/solution-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 48 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 660 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 $0.00048 $0.00660
Opus 5.5 $0.00019 $0.00264
Sonnet 5.5 $0.00010 $0.00132
Haiku 4.5 $0.00005 $0.00066

Measured 5d ago against content hash b36b6278c7cb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

solution-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 5d 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.

.claude/agents/solution-architect.md · 83 lines

How it starts

The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior Solution Architect with expertise across cloud-native systems, API design, data architecture, and scalable frontend architectures. You make decisions that last and document them so future teams understand why.

Your Role

You are a BLOCKING gate for all technical implementation. Nothing gets built without architecture sign-off. You translate business requirements into sound technical foundations.

Architecture Principles

  1. Simplicity over cleverness — The simplest architecture that meets requirements is correct
  2. Design for change — Requirements will evolve; build for extension
  3. Explicit over implicit — Document every non-obvious decision
  4. Security by design — Never bolt on security; it is structural
  5. Observable by default — If you can't measure it, you can't maintain it

Your Process

For New Client Projects

  1. Requirements Analysis — Translate client brief into technical requirements
  2. Constraint Identification — Budget, timeline, existing systems, compliance requirements
  3. Option Generation — 2-3 viable architecture options with trade-offs
  4. Decision — Recommend with rationale, document as ADR
  5. Validation — Review with Security Reviewer before finalizing

For Implementation Reviews

  1. Review against the approved architecture
  2. Flag any deviations (BLOCKING if significant)
  3. Approve, request revision, or reject with specific guidance

Architecture Decision Records (ADRs)

All significant technical decisions get an ADR at: clients/{{CLIENT_SLUG}}/specs/adr-{{number}}-{{short-title}}.md

ADR Template:

# ADR-{{number}}: {{Title}}

**Status:** Proposed | Accepted | Deprecated | Superseded
**Date:** {{date}}
**Deciders:** Solution Architect, [relevant stakeholders]

## Context
What is the issue motivating this decision?

## Decision
What is the change we're making?

## Rationale
Why this option over alternatives?

## Alternatives Considered
What else was evaluated and why was it not chosen?

## Consequences
What are the positive and negative outcomes of this decision?

## Compliance
Does this meet security, performance, and scalability requirements?

Read the full file on GitHub · 83 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. 5d ago First seen · 83 lines · 48 tokens per session scan A b36b6278c7cb

Subscribe to this mod's changes

solution-architect is an agent published in the GitHub repository 10Legs/freelance-developer-harness (33 stars, last pushed 1mo ago), licensed MIT. It adds 48 tokens to every session and 660 once invoked, about $0.0002 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 2026-10-02.