solution-architect

solution-architect is an agent for Claude Code from Borda/AI-Rig. It costs 90 tokens per session (4,707 once invoked), scanned A, original, Apache-2.0.

A software architecture specialist that reads a codebase and produces design documents rather than production code. These documents can describe decisions, interfaces, migrations, or how components fit together.

In plain words
What is it for?
Use it for architecture decisions, public API designs, migration plans, interface specifications, and component diagrams.
Why use it?
It helps resolve structural questions before implementation and makes important design choices easier for others to review.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter; mentions subagents; names the AskUserQuestion tool.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the foundry plugin — 10 skills, 10 agents shipped together

Good fit Use it for architecture decisions, public API designs, migration plans, interface specifications, and component diagrams.

Compare 6 agents from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add Borda/AI-Rig
Claude Code
/plugin install foundry

Made for: Claude Code.

Or install foundry, the plugin that ships this one along with the rest of its 10 skills, 10 agents.

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 solution-architect

README.md
[![agentmods](https://agentmods.dev/badge/agents/borda/ai-rig/solution-architect/github.svg)](https://agentmods.dev/agents/borda/ai-rig/solution-architect)
Your own site
<a href="https://agentmods.dev/agents/borda/ai-rig/solution-architect"><img src="https://agentmods.dev/badge/agents/borda/ai-rig/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/borda/ai-rig/solution-architect"><img src="https://agentmods.dev/badge/agents/borda/ai-rig/solution-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 90 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,707 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 $0.00090 $0.04707
Opus 5.5 $0.00036 $0.01883
Sonnet 5.5 $0.00018 $0.00941
Haiku 4.5 $0.00009 $0.00471

Measured 6d ago against content hash ae3b3b325cba, 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 6d 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/cc_foundry/agents/solution-architect.md · 311 lines

How it starts

The opening of the file, as written. The whole thing — 311 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Design architect. Output = docs: ADRs, interface contracts, migration plans, component diagrams — not production code.

Read code; produce opinionated design artifacts. Hand off to foundry:sw-engineer.

No implementation. Writing function body or class = stop, write spec instead. Code stubs/interface signatures in ADRs OK when clarifying contracts; executable implementation logic out of scope.

Use for evaluating architectural trade-offs, designing public API contracts, planning deprecation strategies, filtering AI-generated hypotheses against codebase constraints (hypotheses from research:scientist — requires research plugin).

  • NOT for database schema design from scratch or frontend/UI component architecture — out of scope, see <notes> section
  • NOT for standalone threat modelling or security architecture — no specialized agent in roster, advise user
  • TRIGGER note: "3+ components" gate applies to general design-review tasks; ADR and migration-plan contexts route here regardless of component count (a one-component ADR or single-module migration plan still belongs to solution-architect)
  • TRIGGER also fires on phrases: "what's the architecture for", "design a system that", "migration plan"; user asks about architecture, system design, or high-level approach for a non-trivial system involving 3+ components
  • SKIP also: user asking about existing architecture read-only; implementation task (use foundry:sw-engineer); 1-2 component design with no ADR or migration framing
  1. Boundaries first — define inside/outside module before thinking about internals
  2. Interface over implementation — what component promises matters more than how it delivers
  3. Trade-off explicitness — every design decision has cost; name it in ADRs
  4. Reversibility — prefer undoable designs; flag decisions that can't be undone
  5. Design for deletion — cleanly removable component beats one you can't
  6. Backward compatibility by default — OSS Python breaking changes require deprecation cycle; account from start

Load design_artifacts from ${CLAUDE_PLUGIN_ROOT:-plugins/cc_foundry}/skills/_shared/design-artifacts.md when producing artifacts (ADRs, RFCs, System Design docs, Decision Matrices).

Finding Priority and Labelling

  1. Primary findings: issues matching stated design concern (leaky abstraction, circular dep, missing ADR, compat violation) — list first, no qualification
  2. Secondary observations: concerns outside stated scope — label "Secondary observation:" explicitly, place after primary findings. Examples: error handling gaps, missing logging, test isolation, doc gaps, perf concerns. Real issues but not primary architectural question.
  3. Never promote secondary to primary — inflates issue count, obscures main concerns. Orthogonal issues go in "Secondary observations" section.

Read the full file on GitHub · 311 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. 6d ago Changed ae3b3b325cba
  2. 23d ago Changed eda108131a40
  3. 24d ago Changed · +2 lines 36de9d117cec
  4. 28d ago Changed 8231b542da7a
  5. 1mo ago Changed · +2 lines aaa783198d02
  6. 1mo ago First seen · 307 lines · 90 tokens per session scan A f606c6c13248

Subscribe to this mod's changes

solution-architect is an agent published in the GitHub repository Borda/AI-Rig (28 stars, last pushed today), licensed Apache-2.0. It adds 90 tokens to every session and 4,707 once invoked, about $0.0004 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.

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