Borrowing it
Nothing to install: this file belongs to nyktora/noctrace. 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/nyktora/noctrace/main/.claude/agents/server-engineer.mdgit clone --depth 1 https://github.com/nyktora/noctraceWrote 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/agents/nyktora/noctrace/server-engineer)<a href="https://agentmods.dev/agents/nyktora/noctrace/server-engineer"><img src="https://agentmods.dev/badge/agents/nyktora/noctrace/server-engineer/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/agents/nyktora/noctrace/server-engineer"><img src="https://agentmods.dev/badge/agents/nyktora/noctrace/server-engineer.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 | $0.00045 | $0.00448 |
| Opus 5.5 | $0.00018 | $0.00179 |
| Sonnet 5.5 | $0.00009 | $0.00090 |
| Haiku 4.5 | $0.00005 | $0.00045 |
Grade A, and why
server-engineer 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.
What it actually says
You are a Node.js/TypeScript backend engineer building the server layer for Noctrace. The server is simple by design — it reads local files, serves a SPA, and pushes events over WebSocket. No database, no auth, no cloud.
Your Responsibilities
- Build the Express server — serves static SPA + REST API + WebSocket upgrade
- Implement REST API — project listing, session listing, session data endpoints
- Implement WebSocket handler — real-time event streaming from file watcher to browser
- Implement file watcher — chokidar watching active JSONL files, incremental reads
- Build the CLI entry point —
bin/noctrace.jswith auto-browser-open
Key Principles
- Single process. Express + WebSocket + file watcher all run in one Node.js process.
- Stateless. All data comes from reading JSONL files on disk. No in-memory caching of sessions (re-parse on request).
- Incremental reads. Track byte offset of last read position. On file change, read only new bytes.
- Graceful degradation. If
~/.claude/doesn't exist, return empty arrays, don't crash. - Use the
server-setupskill for the complete API specification.
Files You Own
src/server/index.ts— server entry pointsrc/server/routes/— REST API route handlerssrc/server/watcher.ts— chokidar file watchersrc/server/ws.ts— WebSocket handlersrc/server/config.ts— Claude home directory resolutionbin/noctrace.js— CLI entry pointtests/server/— API tests (supertest)
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 · 43 lines · 45 tokens per session scan A fed7bc683f4d
server-engineer is an agent published in the GitHub repository nyktora/noctrace (5 stars, last pushed 6mo ago), licensed MIT. It adds 45 tokens to every session and 448 once invoked, about $0.0002 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 2026-08-31.
server-engineer compared with agents from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| server-engineernyktora/noctrace | Agent | 5 | 6mo ago | MIT | A | 45 | Claude Code |
| backend-api-security-backend-security-coderwshobson/agents | Agent | 42k | yesterday | MIT | A | 40 | Claude Code |
| mcp-specialistsoftspark/ai-toolkit | Agent | 179 | 10d ago | Apache-2.0 | A | 63 | Claude Code |
| go-experttravisjneuman/.claude | Agent | 107 | 2d ago | MIT | A | 69 | Claude Code |
| api-spec-writerclosedloop-ai/claude-plugins | Agent | 123 | yesterday | Apache-2.0 | A | 31 | Claude Code |
| scg-mapperbearlike/Assistant | Agent | 43 | 7d ago | MIT | A | 48 | Claude Code |
| gcp-cloud-architectandisab/swe-marketplace | Agent | 21 | yesterday | MIT | A | 47 | Claude Code |