Borrowing it
Nothing to install: this file belongs to TheDecipherist/claude-code-mastery-project-starter-kit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/TheDecipherist/claude-code-mastery-project-starter-kit/main/.claude/commands/diagram.mdgit clone --depth 1 https://github.com/TheDecipherist/claude-code-mastery-project-starter-kitWrote 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.
[](https://agentmods.dev/commands/thedecipherist/claude-code-mastery-project-starter-kit/diagram)<a href="https://agentmods.dev/commands/thedecipherist/claude-code-mastery-project-starter-kit/diagram"><img src="https://agentmods.dev/badge/commands/thedecipherist/claude-code-mastery-project-starter-kit/diagram/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.
<a href="https://agentmods.dev/commands/thedecipherist/claude-code-mastery-project-starter-kit/diagram"><img src="https://agentmods.dev/badge/commands/thedecipherist/claude-code-mastery-project-starter-kit/diagram.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00017 | $0.02766 |
| Opus 5.5 | $0.00007 | $0.01106 |
| Sonnet 5.5 | $0.00003 | $0.00553 |
| Haiku 4.5 | $0.00002 | $0.00277 |
Grade A, and why
diagram 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 2mo 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.
How it starts
The opening of the file, as written. The whole thing — 302 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Generate Diagram
Scan the actual project and generate/update diagrams based on what exists in code.
Type: $ARGUMENTS
Available types:
architecture— System overview: services, connections, data flow → updatesproject-docs/ARCHITECTURE.mdapi— API routes map: all endpoints grouped by resource → updatesproject-docs/ARCHITECTURE.mddatabase— Database schema: collections, indexes, relationships → updatesproject-docs/ARCHITECTURE.mdinfrastructure— Deployment topology: servers, containers, regions → updatesproject-docs/INFRASTRUCTURE.mdall— Generate all diagram types
If --update is passed, replace existing diagrams in-place. Otherwise, show the diagram and ask before writing.
Diagram Format
ALL diagrams use ASCII box-drawing characters. No Mermaid, no SVG, no external tools. ASCII works in every terminal, every markdown renderer, every code review.
Box characters: ┌ ┐ └ ┘ │ ─ ├ ┤ ┬ ┴ ┼
Arrows: → ← ↑ ↓ ──> <── ───>
Type: architecture
Scan the project and generate a system overview diagram.
What to scan:
-
src/directory structure — identify services, handlers, adaptersfind src/ -name "*.ts" -o -name "*.tsx" 2>/dev/null | head -50 -
Entry points — find all server/app files
grep -rl "app.listen\|createServer\|express()\|fastify()\|Hono()" src/ 2>/dev/null -
Route definitions — find where endpoints are defined
grep -rn "app\.\(get\|post\|put\|delete\|patch\)\|router\.\(get\|post\|put\|delete\|patch\)" src/ 2>/dev/null -
Database usage — find which services access the database
grep -rl "queryOne\|queryMany\|insertOne\|updateOne\|bulkOps\|batch\|StrictDB\|MongoClient\|PrismaClient" src/ 2>/dev/null -
External service calls — find adapters and API calls
grep -rl "fetch(\|axios\|got(" src/ 2>/dev/null -
Package.json — check for framework indicators
next→ Next.js appexpress→ Express APIfastify→ Fastify APIhono→ Hono API
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.
- 2mo ago First seen · 302 lines · 17 tokens per session scan A 9e35c4f7255d
diagram is a command published in the GitHub repository TheDecipherist/claude-code-mastery-project-starter-kit (342 stars, last pushed 4mo ago), licensed MIT. It adds 17 tokens to every session and 2,766 once invoked, about $0.0001 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.
diagram compared with commands from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| diagramTheDecipherist/claude-code-mastery-project-starter-kit | Command | 342 | 4mo ago | MIT | A | 17 | Claude Code |
| checklistgithub/spec-kit | Command | 148k | yesterday | MIT | A | 13 | Claude Code |
| clarifygithub/spec-kit | Command | 148k | yesterday | MIT | A | 27 | Claude Code |
| specifygithub/spec-kit | Command | 148k | yesterday | MIT | A | 13 | Claude Code |
| analyzegithub/spec-kit | Command | 148k | yesterday | MIT | A | 26 | Claude Code |
| convergegithub/spec-kit | Command | 148k | yesterday | MIT | A | 35 | Claude Code |
| implementgithub/spec-kit | Command | 148k | yesterday | MIT | A | 14 | Claude Code |