List all built-in training templates. Returns catalog of classical strength/powerlifting programs with metadata (id, name, author, weeks, days_per_week, difficulty, category, source_url).

Get a specific week's sessions from a template. Pure function: same input returns same output. Returns a list of sessions with prescribed exercises (sets, reps, intensity, AMRAP flag).

Given a planned session, what was actually performed, and current fatigue state, return a list of suggested adjustments (scale weight, change intensity, deload, etc.). Returns {adjustments: [...], summary: '...'}.

Given a template, target week, and adjustments (DELOAD_WEEK, SCALE_WEEK, SHIFT_VOLUME, ADD_REST_DAY), return the adjusted plan JSON. The agent decides whether to persist this — the user retains veto power.

Given a template, current week, fatigue state, and last session, return today's recommended session with rationale (e.g., deload triggered).

Calculate Banister fitness-fatigue metrics (CTL/ATL/TSB) from recent training sets. Returns MISSING_BASELINE if sets is empty (constraint C4). Provide at least 14 days for partial CTL/ATL, 42 days recommended for full.

Get form cues, common mistakes, and equipment alternatives for an exercise. Returns cues list, common_mistakes list, and alternatives list.

Explain a training science principle with source citation. Topics include: rpe_autoregulation, dup_periodization, banister_model, deload_triggers, volume_landmarks, etc. Returns body + source_citation + related_tools.