architecture

A guided architecture-review workflow for understanding an unfamiliar codebase before a major change. It maps the structure, creates a self-contained HTML report with Mermaid diagrams, and challenges the proposed findings.

In plain words
What is it for?
Onboarding to a codebase, planning major refactors, reviewing system structure, identifying candidate improvements, and documenting test gaps or unexpected coupling.
Why use it?
It helps reveal boundaries, shared dependencies, hotspots, and missing tests before a large refactor or architectural decision.

Skill for Claude CodeCodex

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 skills/datit309/supergraph/architecture
Any agent
npx skills add datit309/supergraph --skill architecture
Clone the repo
git clone --depth 1 https://github.com/datit309/supergraph

Made for: Claude Code, Codex.

Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 721 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 $0.00052 $0.00721
Opus 5 $0.00026 $0.00360
Sonnet 5 $0.00010 $0.00144
Haiku 4.5 $0.00005 $0.00072

Measured yesterday against content hash 1f42e8606423, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

architecture 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.

plugins/supergraph/skills/architecture/SKILL.md · 78 lines

How it starts

The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/supergraph:architecture

Three phases: explore → HTML report → grilling loop.

Announce: "🏛️ /supergraph:architecture — mapping codebase structure..."

Phase 1 — Explore

1a. Read CONTEXT.md:

cat CONTEXT.md 2>/dev/null || echo "No CONTEXT.md"

1b. Codebase Memory overview (optional): Use CBM_PROJECT with get_architecture aspects overview, layers, boundaries, clusters, and hotspots. After get_graph_schema, run shared contract recipes hubs, bridges, cross-boundary, and test-gaps. If codebase-memory-mcp is unavailable, label graph evidence unavailable, use Serena/filesystem evidence, and generate Mermaid diagrams from imports.

1c. Serena structure (optional):

mcp__serena__get_symbols_overview()

1d. Read 3-5 hub node files — understand actual structure, naming, patterns.

Phase 2 — Generate HTML Report

Write self-contained docs/supergraph/architecture-review-<YYYY-MM-DD>.html with Tailwind+Mermaid header, architecture graph TD, per-candidate card (Problem/Proposal/Before/After Mermaid/Impact/Trade-offs with badge Strong/Worth exploring/Speculative), plus tables for Test Gaps and Unexpected Coupling.

Open: open docs/supergraph/architecture-review-<date>.html || xdg-open ... || echo "Report saved: ..."

Phase 3 — Grilling Loop

For each Strong candidate, ask one focused question:

"Candidate N proposes [X]. Is this consistent with [constraint from CONTEXT.md / known business rule]?"

Incorporate answers to refine the candidate cards. Mark dismissed candidates as Rejected — [reason].

After grilling, present final prioritized list:

Strong candidates (ready for /supergraph:plan):
  1. [Name] — [one-line rationale]

Worth exploring (needs spike first):
  2. [Name] — [open question to resolve]

Speculative (park for later):
  3. [Name] — [what would need to be true]

Report

✅ /supergraph:architecture complete
- Report: docs/supergraph/architecture-review-<date>.html
- Communities: N | Hub nodes: N | Bridge nodes: N
- Candidates: N Strong, N Worth exploring, N Speculative
- Next: /supergraph:plan (for Strong candidates) or /supergraph:prototype (for uncertain ones)

Read the full file on GitHub · 78 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 · 78 lines · 52 tokens per session scan A 1f42e8606423

Subscribe to this mod's changes

architecture is a skill published in the GitHub repository datit309/supergraph (21 stars, last pushed 4d ago), licensed MIT. It adds 52 tokens to every session and 721 once invoked, about $0.0003 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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