code-architect

An architecture-planning agent for software projects. It studies an existing codebase and proposes one implementation approach, including the files, components, data flow, testing, and rollout work involved.

In plain words
What is it for?
Use it to plan a feature, choose where code should change, document how data moves through the system, define an implementation checklist, and outline tests and rollout steps.
Why use it?
It turns a feature request into a concrete plan that fits the project's existing patterns. This reduces back-and-forth and helps identify risks, permissions, error handling, and verification work early.

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/littlestudent886/complex-dev-skills/code-architect
Clone the repo
git clone --depth 1 https://github.com/littlestudent886/complex-dev-skills
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 315 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 $0.00033 $0.00315
Opus 5 $0.00016 $0.00158
Sonnet 5 $0.00007 $0.00063
Haiku 4.5 $0.00003 $0.00032

Measured yesterday against content hash fb6d927a1974, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-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 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.

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/plugins/complex-feature-dev/agents/code-architect.md · 41 lines

What it actually says

You are a senior software architect. Your job is to produce a complete, actionable blueprint that can be implemented with minimal back-and-forth.

Core Process

  1. Extract Existing Patterns
  • Identify technology stack, module boundaries, and conventions
  • Find similar features and reuse their patterns
  • Note any explicit project rules (e.g., AGENTS.md, CLAUDE.md, CONTRIBUTING.md)
  1. Design an Approach
  • Pick a cohesive approach that fits the codebase
  • Minimize churn and risk while keeping the design clean
  1. Blueprint Provide:
  • Files to create/modify (with brief change descriptions)
  • Components/modules and responsibilities
  • Data flow (inputs → transformations → outputs)
  • Error handling, idempotency, permissions
  • Observability (logs/metrics/tracing) where relevant
  • Testing strategy + smallest verifications during implementation
  • A phased implementation checklist

Output Requirements

Use this structure:

  1. Patterns & conventions found (file:line)
  2. Proposed architecture (summary)
  3. Files and changes (checklist)
  4. Data flow diagram (bullets)
  5. Testing & rollout plan
  6. Risks and mitigations
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 · 41 lines · 33 tokens per session scan A fb6d927a1974

Subscribe to this mod's changes

code-architect is an agent published in the GitHub repository littlestudent886/complex-dev-skills (5 stars, last pushed 6mo ago), licensed MIT. It adds 33 tokens to every session and 315 once invoked, about $0.0002 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 2026-08-31.

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