What is PKUOttoElective2026Spring CLAUDE.md?

Project instructions for an automated bot that watches Peking University’s elective-course system and tries to enroll when a vacancy appears. It also describes captcha solving, configuration files, and an optional monitoring server.

Use them when setting up the bot, choosing a configuration file, enabling its monitoring page, investigating website changes, or running and stopping the process.

They explain the required Python version, dependencies, credentials, and commands needed to run or debug the bot. They also point out parts of the university website that may have changed since the bot was written.

How ou524u/PKUOttoElective2026Spring configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to ou524u/PKUOttoElective2026Spring. 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/ou524u/PKUOttoElective2026Spring/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/ou524u/PKUOttoElective2026Spring

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/ou524u/pkuottoelective2026spring/claude-md/github.svg)](https://agentmods.dev/instructions/ou524u/pkuottoelective2026spring/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/ou524u/pkuottoelective2026spring/claude-md"><img src="https://agentmods.dev/badge/instructions/ou524u/pkuottoelective2026spring/claude-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/ou524u/pkuottoelective2026spring/claude-md"><img src="https://agentmods.dev/badge/instructions/ou524u/pkuottoelective2026spring/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,871 This file is loaded in full into every session.

When invoked 1,871 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.

Model	Per session	Once invoked
Fable 5.1	$0.01871	$0.01871
Opus 5.5	$0.00748	$0.00748
Sonnet 5.5	$0.00374	$0.00374
Haiku 4.5	$0.00187	$0.00187

Measured 2mo ago against content hash 2a7e2f013770, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

PKUOttoElective2026Spring CLAUDE.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 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.

CLAUDE.md · 140 lines

How it starts

The opening of the file, as written. The whole thing — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Overview

PKUOttoElective2026Spring: an automated course-selection bot for Peking University's elective system (elective.pku.edu.cn). It continuously polls for course vacancies and submits enrollment requests when slots open, using an online captcha recognition service (TT识图, ttshitu.com) for verification codes.

Context (2026 debugging): The code was written in 2022 and may have API drift vs. the live PKU elective site. Primary targets for breakage: URL endpoints in const.py, HTML table structure parsed in parser.py, and captcha recognition flow.

Running the Bot

# Basic usage (reads config.ini by default)
python3.12 main.py

# Custom config file
python3.12 main.py -c /path/to/config.ini

# With monitoring HTTP server (127.0.0.1:7074)
python3.12 main.py -m

# Run in background
nohup python3.12 main.py > log/bot_run.log 2>&1 &

# Stop with Ctrl+C (or kill <PID>)

Requires python3.12 (system python3 lacks lxml). Dependencies: requests, lxml, numpy, aiohttp, Pillow.

Setup

# Copy and fill in credentials
cp config.sample.ini config.ini
cp apikey.sample.json apikey.json

config.ini — main configuration:

[user]: student_id (portal login ID), password, dual_degree (true/false), identity (bzx/bfx), elective_xh (enrollment student number — may differ from student_id for grad students)
[client]: supply_cancel_pages (number of pages to scan, default 1), refresh_interval, elective_client_pool_size, etc.
[notification]: WeChat push via sre24.com (set disable_push = 1 to silence)
[session]: Optional jsessionid and route — if set, skips IAAA SSO entirely and injects browser cookies directly (useful when SSO is broken; extract from browser DevTools)
[course:ID]: Define target courses (name, class, school matching elective page exactly)
[mutex:ID]: Mutual-exclusion rules — once one course in the group is elected, others are skipped
[delay:ID]: Delay rules — only attempt enrollment when remaining quota ≤ threshold

Read the full file on GitHub · 140 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.

2mo ago First seen · 140 lines · 1,871 tokens per session scan A 2a7e2f013770

Subscribe to this mod's changes

PKUOttoElective2026Spring CLAUDE.md is an instructions file published in the GitHub repository ou524u/PKUOttoElective2026Spring (31 stars, last pushed 8mo ago), licensed MIT. It adds 1,871 tokens to every session, about $0.0075 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.

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PKUOttoElective2026Spring CLAUDE.md next to 6 instructions from other repositories
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PKUOttoElective2026Spring: Instructions file for Claude Code