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.
npx agentmods add commands/dr-code/tessera/diagramgit clone --depth 1 https://github.com/dr-code/tesseraWhat 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 | $0.00017 | $0.02744 |
| Opus 5 | $0.00009 | $0.01372 |
| Sonnet 5 | $0.00003 | $0.00549 |
| Haiku 4.5 | $0.00002 | $0.00274 |
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 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.
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 → updatesdocs/ARCHITECTURE.mdapi— API routes map: all endpoints grouped by resource → updatesdocs/ARCHITECTURE.mddatabase— Database schema: collections, indexes, relationships → updatesdocs/ARCHITECTURE.mdinfrastructure— Deployment topology: servers, containers, regions → updatesdocs/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.
- yesterday First seen · 302 lines · 17 tokens per session scan A 190b62d9d3a4
diagram is a command published in the GitHub repository dr-code/tessera (1 stars, last pushed 21d ago), licensed MIT. It adds 17 tokens to every session and 2,744 once invoked, about $0.0001 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.
Other commands, from other repositories
checklist
Generate a custom checklist for the current feature based on user requirements.
clarify
Identify underspecified areas in the current feature spec by asking up to 5 highly targeted clarification questions and encoding answers back into the spec.
specify
Create or update the feature specification from a natural language feature description.
analyze
Perform a non-destructive cross-artifact consistency and quality analysis across spec.md, plan.md, and tasks.md after task generation.
converge
Assess the current codebase against the feature's spec, plan, and tasks, then append any remaining unbuilt work as new tasks to tasks.md so implement can complete it.
implement
Execute the implementation plan by processing and executing all tasks defined in tasks.md.