mybk-planner: HCMUT course planner, GPA & myBK portal CLI

mybk-planner is a read-only command-line tool for HCMUT (Đại học Bách Khoa TP.HCM) students. It turns the myBK portal into a course planner: GPA tracker, transcript reader, CTĐT curriculum progress, timetable, exam schedule, and a next-semester course recommendation engine with tuition estimates. All from your terminal, in Vietnamese and English output.

Read-only by design. It finds the classes and recommends a plan; registration stays in the official portal.

Terminology: Vietnamese words like khối, đợt, hoãn thi, TC/HK, and CTĐT are kept untranslated because they are the exact terms used by the myBK portal and official HCMUT documents — keeping them lets you cross-check the tool's output directly against the portal.

Tiếng Việt → README.vi.md

Table of Contents

• What can it do?
• Why another myBK tool?
• How do I install it?
• How do I configure it?
• Quick start
• Commands
• The course planner
• Interactive REPL
• JSON output for scripting
• API quirks & parser notes
• Security & scope
• Tests & development
• FAQ
• License

What can it do?

• GPA & transcript: cumulative GPA on the 10-point and 4-point scales, per-semester GPA history, letter-grade distribution, courses you can still improve (D grades), and retakes that are no longer "failed" once you pass them.
• CTĐT curriculum progress: per-khối (knowledge block) credit progress against the official program requirements, with the correct multi-constraint khối math (BB core + elective pool + seminar are summed, not collapsed).
• Timetable & exam schedule: fetch your thời khóa biểu and lịch thi for any semester.
• Course planner: plan combines curriculum + grades (+ the live open-class feed) and suggests a next-semester course list. It prioritises retakes, fills each khối's gap up to its own remaining credits, and stays inside your per-semester credit budget.
• Tuition estimates: the plan prints an estimated semester fee from the official 2026-27 fee notice: the flat "trọn gói" fee for your program, vượt định mức credits billed per credit above the 18-TC/HK quota, and the Bảng 1.2 discount tiers when you register fewer credits.
• Registration read-only surface: current đợt (registration round) info, open classes, your own tickets and defer-exam (hoãn thi) rows. Write endpoints are deliberately not wrapped.

Why another myBK tool?

Existing HCMUT community tools (mybk-mobile, BKSchedule, BKSCrawler, score-checker scripts) are mostly stale, archived, or browser plugins. mybk-planner is:

• Live-verified against the current myBK /app API (2026), including the ?null anti-cache suffix, the UTF-8 BOM quirk, and the {code,msg,data} envelope.
• Read-only and safe: no tao-phieu-dang-ky / huy-phieu-dang-ky wrappers, ever. Your registration workflow is untouched.
• Both CLI and library: pretty tables in the terminal, raw JSON with --json, and importable pure functions (analysis, fees) for your own scripts.
• Privacy-conscious: credentials come from a git-ignored .env file, never committed; the tool is designed for your own account only.

How do I install it?

Requires Python 3.10+. Install from PyPI:

pip install mybk-planner

Or from source:

git clone https://github.com/danhnth/mybk-planner.git
cd mybk-planner
pip install -e ".[dev]"      # includes pytest + ruff for development

Either way you get the mybk-planner console command (or run python -m mybk_planner.cli).

How do I configure it?

Copy the template and fill in your own credentials:

cp .env.example .env
# edit .env with your HCMUT myBK login

Variable	Required	Description
MYBK_USERNAME	yes	BKNetId: the part of your @hcmut.edu.vn email before the @
MYBK_PASSWORD	yes	your CAS password (quote it if it contains # or spaces)
MYBK_MSSV	no	student ID override; auto-detected from your profile when omitted

Credentials resolve in this order: CLI flag → OS environment variable → .env file. The legacy MYBK_TEST_USERNAME/MYBK_TEST_PASSWORD/MYBK_TEST_MSSV names still work as fallbacks.

Quick start

mybk-planner info            # who am I (profile)
mybk-planner gpa             # cumulative GPA, 10-scale + 4-scale
mybk-planner ctdt            # curriculum progress per knowledge block
mybk-planner plan            # suggested next-semester course plan + tuition estimate
mybk-planner                 # drop into the interactive REPL

Every command prints a rich table by default; add --json for raw scriptable output:

mybk-planner plan --max-tc 18 --semester 20253 --json

Commands

Command	What it fetches
auth	CAS login + JWT sanity check
info	student profile (MSSV, class, faculty)
grades	full transcript + pass/fail/mean summary
gpa	cumulative GPA (4-scale and 10-scale) + credits
ctdt	CTĐT curriculum progress per khối
schedule --semester-year 20252	timetable for a semester (YYYYk code)
exams --namhoc 2025 --hocky 2	exam schedule (GK/CK rows)
reg-dots	current registration đợt(s)
reg-open-classes --hockytkb 20253	open/withdrawable classes for a semester
reg-tickets	your pending + finished registration tickets
reg-defer --hocky 20253 --dot HOANTHI_CK.20253.1	hoãn-thi (defer exam) đợt + rows
reg-profile	your registrant profile
plan [--max-tc 18.0] [--semester 20253]	suggested next-semester plan + analysis + tuition
dashboard [--max-tc 18.0] [--semester 20253]	info + GPA + plan in one screen, one login

The course planner (plan)

plan reads the CTĐT curriculum and your grades, then:

1. Puts retakes first (courses you took but haven't passed yet).
2. Fills each unmet khối up to its own remaining-credit gap, largest gap first, so one block can't hog the whole budget while Tốt nghiệp stays empty.
3. Spills any leftover budget into met-khối courses by priority.
4. Prints a full analysis panel: GPA trajectory, completion %, khối compliance, grade health, graduation timeline, and a tuition estimate.

Key facts it gets right:

• Pass authority is the grade list, not CTĐT's diemdat. A retake pass (e.g. F then D+) correctly clears the course from "failed".
• Khối gaps are sums of distinct requirement rows. The feed repeats each group's requirement on every course row, and a khối can hold several additive groups (e.g. Chuyên ngành = BB core + elective pool + seminar). Naive first-row reads under-count the program.
• The timeline uses incremental credits between semesters: ceil(remaining / max_tc) semesters at your budget.
• Tuition (from the 2026-27 fee notice): flat "trọn gói" fee for your program, credits above the 18-TC/HK định mức billed at the per-credit price, and the ≤12/≤9/≤6 TC discount tiers (15/30/45%) shown when your plan qualifies.

Interactive REPL

Run with no subcommand for a menu-driven session (one CAS login, then 1 to 8 plus find, help):

1 info · 2 grades · 3 gpa · 4 ctdt · 5 plan · 6 schedule · 7 exams · 8 dashboard

JSON output for scripting

Pass --json anywhere for a single JSON document on stdout (login confirmation goes to stderr), so you can pipe into jq or your own analysis:

mybk-planner plan --json | jq '.plan.completion'

API quirks & parser notes

Things the myBK API doesn't tell you, documented for contributors:

• Envelope: {"code": "200"|"400", "data": …, "msg": …}. code is a string; 400 still carries business rows.
• ?null suffix is appended to the first query param on GET calls (anti-cache quirk of /app/js/main.js).
• UTF-8 BOM (\ufeff) is stripped from responses.
• id_hoc_ky encoding: (YYYY % 100) * 10 + HK. HK2 of 25-26 ⇒ 252.
• CAS: myBK sits behind CAS 3.5.1 (sso.hcmut.edu.vn/cas for /app). A 403 during login usually means rate-limited, so wait, don't spam.

Security & scope

• Your own account only. The schedule/exams tools accept an mssv argument. Feed them your own.
• Read-only. Registration and defer-exam write endpoints (tao-phieu-dang-ky, huy-phieu-dang-ky, cap-nhat-…) are discovered in the API bundles but deliberately not wrapped.
• Credentials never committed. .env, tokens and cookies are git-ignored.
• Not affiliated with HCMUT; this is an unofficial community tool.

Tests & development

The pure logic (analysis, fees, env) has an offline pytest suite: no network, no account needed:

pip install -e ".[dev]"
python -m pytest tests -q
ruff check mybk_planner tests

CI runs pytest + ruff + a wheel build on Python 3.10/3.11/3.12.

FAQ

Is this an official HCMUT tool?

No. It is an unofficial, community-maintained read-only client for the myBK portal.

Will my account be safe?

The tool only reads data using your own credentials, never modifies anything, and is designed for your own account only. Be mindful of myBK's rate limits.

Can I use it for someone else's data?

No. Feed it only your own MSSV. The underlying endpoints are not for cross-account use.

Why does my plan total differ from a raw sum of CTĐT credits?

Because a khối's gap is the sum of its distinct requirement rows, and the feed repeats requirement values on every course row. Raw sums over every listed elective option over-count.

Do I still register in myBK?

Yes. This tool finds classes and suggests a plan; you always register through the official myBK portal.

License

MIT © 2026 Nguyễn Thành Danh