Search the Rutgers course catalog by free text, subject code (e.g. '198' for CS), level (300 = 300-level), and term. Returns compact course rows. Use before get_course when the user names a topic not a code.

Full detail for one course: prereq AST + raw text, sections summary, core codes, credits. Accepts 'CS 344', '198:344', or '01:198:344'. Always pass caveats through to the user.

Annotated prerequisite tree for a course (AST with course titles). Use to explain WHY a course is or isn't available.

Given candidate course_strings and the student's completed courses, return per course: eligible (bool), the unsatisfied prereq subtree, and any 'unknowns' (notes we could not verify automatically).

List sections for a course in a term with meeting times, instructors, and open status. Times are minutes-from-midnight; Thursday is 'H'.

Read a stored user-profile value (e.g. 'completed_courses', 'target_grad', 'preferences'). Returns null if unset.

Store a user-profile value so the student does not repeat themselves across turns. Value is any JSON.

Look up a professor by name. Returns their cached RateMyProfessors rating (avg_rating 1–5, avg_difficulty 1–5, would_take_again_pct) plus which courses they teach this term. Accepts any name format: 'Professor Smith', 'J. Smith', or SOC format 'SMITH, J'. Always surface match_confidence and caveats[] — low-confidence matches (<85%) should be flagged to the user. ratings_available=false means the scraper has not run yet for this term.

Historical fill statistics for a section index, derived from the openSections poller. Returns hours_to_first_fill (how quickly the section filled after registration opened), pct_time_closed (fraction of the registration window the section was unavailable), and reopen_count (how many times a closed section reopened due to drops — high reopen_count means a closed section is still worth watching). Returns status='no_data' when the poller has not yet collected data for this term. Always surface caveats[] to the user.

Per-requirement-bucket progress for the CS BS major. completed: list of course strings the student has finished. Returns buckets with satisfied/remaining course lists and credit counts. Call this before solve_degree_plan to show what's left to complete.

Plan remaining semesters from now to target_term. completed: list of course strings the student has finished. target_term: {'year': 2028, 'term': 1} where term 1=spring, 9=fall. preferences: optional dict with max_credits_per_term (int, default 18), min_credits_per_term (int, default 12), current_year, current_term. pins: optional dict mapping course_string to {'year': Y, 'term': T} to force placement. Returns a semester-by-semester plan or a structured infeasibility explanation. Always call get_requirements_progress first to show the student their remaining requirements.

Given a list of course_strings and a term, return up to k (default 3) conflict-free section schedules using CP-SAT optimization. preferences may include earliest_start (minutes from midnight, e.g. 600=10am), latest_end, days_off (list of day strings like ['F']), campus_preference (e.g. 'BUSCH'). Returns schedules with section assignments, a human-readable summary, and penalty_score (lower=better). Always surface caveats[] to the user. Use get_sections first to confirm sections exist for the term.

Check whether a proposed schedule (list of section index numbers) has any time conflicts. Use after the student manually edits a solve_semester_schedule result. Input: {sections: [index_number, ...], term: int}. Returns valid (bool), conflicts (list of overlapping pairs), and caveats (unknown indexes).