nccu-course-mcp: Instructions file for Codex

AGENTS.md

nccu-course-mcp AGENTS.md is an instructions file for Codex, OpenCode from yyu0310/nccu-course-mcp. It costs 826 tokens per session, scanned A, original, MIT.

Repository instructions for an MCP server that searches NCCU’s live university course system. The server can find courses, departments, schedules, and syllabi, which are documents describing a course’s content and requirements.

In plain words
What is it for?
Use them when modifying the course-search server, its API client, department data, schedule conflict checks, or syllabus retrieval.
Why use it?
They explain the codebase, its live-data limitation, testing rules, and important implementation traps so changes do not silently break tool descriptions or course queries.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is yyu0310/nccu-course-mcp's own configuration. It tells Codex and OpenCode how to work on nccu-course-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything nccu-course-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to yyu0310/nccu-course-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/yyu0310/nccu-course-mcp/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/yyu0310/nccu-course-mcp

Made for: Codex, OpenCode.

Wrote 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.

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README.md
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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.

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<a href="https://agentmods.dev/instructions/yyu0310/nccu-course-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/yyu0310/nccu-course-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 826 This file is loaded in full into every session.
When invoked 826 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00826 $0.00826
Opus 5 $0.00413 $0.00413
Sonnet 5 $0.00165 $0.00165
Haiku 4.5 $0.00083 $0.00083

Measured 8d ago against content hash a6ea4ac314f8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

nccu-course-mcp AGENTS.md 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 8d 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.

AGENTS.md · 56 lines

How it starts

The opening of the file, as written. The whole thing — 56 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — NCCU Course MCP

Context for AI assistants working on this repo.

What this is

A local (stdio) MCP server that queries NCCU's course-listing API (es.nccu.edu.tw, backing qrysub.nccu.edu.tw) and exposes five tools: search_all, check_schedule, list_departments, search_courses, get_syllabus. Live-only: no local course database.

Design principle: sink model intelligence into deterministic code (structured slots, note_facts mining, conflict checking) so weak models get the same answer quality as strong ones. Tool docstrings carry the query guide; they are the only documentation every MCP client is guaranteed to see. NEVER build a docstring by string concatenation ("""...""" + X): it silently becomes __doc__ = None and the tool registers with no description (test 6g guards this).

Layout

  • src/nccu_course_mcp/server.py — FastMCP entry (main()), the five tools, dept resolution.
  • src/nccu_course_mcp/client.py — legacy-TLS HTTP session, search_raw(), normalize(), fetch_syllabus().
  • src/nccu_course_mcp/dept_codes.json — department code↔name snapshot (loaded at import).
  • src/nccu_course_mcp/build_dept_codes.py — regenerate the snapshot by scanning live.
  • src/nccu_course_mcp/test_server.py — functional self-test (hits live API).

Run / test

python -m venv .venv && ./.venv/bin/pip install -e .
./.venv/bin/python src/nccu_course_mcp/test_server.py

Gotchas (don't undo these)

  • Legacy TLS: the upstream needs OP_LEGACY_SERVER_CONNECT; Python's default SSL rejects it. The adapter in client.py handles it; keep it.
  • 500-row cap: broad queries (omitting dp3) are truncated at 500 rows upstream. Always query per department (dp3), never school-wide in one call.
  • Query shape: sem + dp3 is enough; dp1/dp2 are optional. For regular departments, dp3 = first 3 digits of a course id = the department code.
  • dp3 is NOT always the course-id prefix (2026-07-17 bug): school-wide units use their own dp3 code spaces: 整開/通識 (107=經濟學, 2S4=社會科學類通識; course ids start 000), 學分學程 (P01–P79), 體育/國防 (6S1/7S1), plus alphanumeric college codes (ZU1, ZC0, NU1, 1T3…). The authoritative code tree is the qrysub frontend static file https://qrysub.nccu.edu.tw/assets/api/unit.json (17 L1 units / L2 level / L3 = dp3). build_dept_codes.py scans that whole tree; the hardcoded NAME dict is fallback only.
  • Same name, two codes: a department name can map to both an undergrad and a graduate code (e.g. 財務管理學系 = 307 and 357). _resolve_dept refuses to guess.
  • fetch_syllabus is host-restricted to *.nccu.edu.tw; keep that check (trust boundary).

Read the full file on GitHub · 56 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. 8d ago First seen · 56 lines · 826 tokens per session scan A a6ea4ac314f8

Subscribe to this mod's changes

nccu-course-mcp AGENTS.md is an instructions file published in the GitHub repository yyu0310/nccu-course-mcp (1 stars, last pushed 1mo ago), licensed MIT. It adds 826 tokens to every session, about $0.0041 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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