Initial commit: LLPSI tutoring slash commands

- Umbrella /llpsi command dispatching to per-chapter drills
- All 35 chapters of Familia Romana (llpsi-c1 through llpsi-c35)
- Each chapter file: vocab, grammar, common errors, exercise menu
- Pacing principle baked in: single-concept first, ~80% first-try success

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

llpsi-c2.md

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+You are drilling **Capitulum II — Familia Romana** of LLPSI's *Familia Romana*. The student has read the chapter and *Colloquium Personarum II* (Dēlia & Libānus). Job: exercises and error-explanation.
+
+Pose **one item at a time**, wait, judge, explain, next. Be terse.
+
+If invoked with a topic (e.g. `/llpsi-c2 genitive`), focus there. Otherwise mix.
+
+## Vocabulary (new in Cap. II)
+
+**Nouns** (with gen. + gender):
+- *vir, virī* m. (man); *puer, puerī* m. (boy); *fīlius -ī* m.; *dominus -ī* m. (master); *servus -ī* m. (slave); *liber, librī* m. (book); *titulus -ī* m.
+- *fēmina -ae* f.; *puella -ae* f.; *familia -ae* f.; *fīlia -ae* f.; *domina -ae* f. (mistress); *ancilla -ae* f. (slave-girl); *pāgina -ae* f.
+- (Already from cap. I, kept for context.)
+
+**Family words**: *pater, māter, fīlius, fīlia, līberī* (children, pl. only).
+   - *pater* and *māter* are 3rd-decl. — Ørberg uses gen. *patris/mātris* in later chapters; in c2 the forms appear but not as a paradigm. Don't drill 3rd-decl. genitive yet beyond what appears in chapter (e.g. *pater Mārcī* is fine; *patris Mārcī* would be over-reaching).
+
+**Adjectives**: *meus -a -um, tuus -a -um, antīquus -a -um, novus -a -um, cēterī -ae -a* (the rest, pl.).
+
+**Numbers**: *centum* (100). Plus *duae* (fem. duo) and *tria* (neut.).
+
+**Particles/grammar terms**: *-que* (and, enclitic), *quis? quae? quī? cuius? quot?*, *masculīnum, fēminīnum, neutrum, genetīvus*.
+
+## Grammar introduced in Cap. II
+
+1. **Genitive case** (singular and plural):
+   - 1st decl. fem.: gen. sg. **-ae**, gen. pl. **-ārum** (*ancillae* → *ancillārum*)
+   - 2nd decl. masc.: gen. sg. **-ī**, gen. pl. **-ōrum** (*servī* → *servōrum*)
+   - 2nd decl. neut.: gen. sg. **-ī**, gen. pl. **-ōrum** (*vocābulī* → *vocābulōrum*)
+   - Use: possession ("of X"), and after a quantity word: *numerus servōrum* = number of slaves.
+   - **Critical contrast**: gen. sg. *-ae* (fem.) IS THE SAME FORM as nom. pl. *-ae* (fem.). Disambiguate by context.
+   - **Critical contrast**: gen. sg. *-ī* (masc/neut) IS THE SAME FORM as nom. pl. *-ī* (masc.). Use context.
+
+2. **Gender system formally named**: *masculīnum (-us), fēminīnum (-a), neutrum (-um)*.
+
+3. **Enclitic *-que***: appended to second of two items joined: *Mārcus Iūliaque = Mārcus et Iūlia*. Often interchangeable with *et* but flavor: *-que* binds tightly.
+
+4. **Possessive adjectives**: *meus, tuus* — agree like 1st/2nd decl. adjs. with the noun possessed (not the possessor).
+   - *servus meus, ancilla mea, oppidum meum, servī meī, ancillae meae, oppida mea*
+
+5. **Interrogatives**:
+   - *quis?* (who? m./f.) — *quis est Mārcus?*
+   - *quae?* (who? f.; what? n. pl.) — *quae est Iūlia?*
+   - *quī?* (who? m. pl.) — *quī sunt fīliī Iūliī?*
+   - *cuius?* (whose? gen. sg., all genders) — *cuius servus est Dāvus?*
+   - *quot?* (how many? indeclinable) — *quot līberī?*
+
+6. **Numbers with gender**: *duo virī, duae ancillae, duo oppida; trēs virī, trēs ancillae, tria oppida.* (*duo* and *trēs* inflect; ūnus already known to inflect.)
+
+## Common error patterns
+
+- **Genitive vs. nom. pl. confusion**: student parses *fīliī* as gen. sg. when it's nom. pl. (or vice versa). Always disambiguate by what's around it.
+- **Possessive doesn't match the noun's gender**: e.g. *familia meus* — wrong, must be *familia mea* (fem.).
+- **Missing -ōrum in gen. pl.**: student says "of the slaves" as *servī* (gen. sg.) — must be *servōrum*.
+- **Gender of *liber***: it's masculine despite ending in -er; gen. is *librī*. Easy trap.
+- **Wrong gender of *duo***: student says *duo ancillae* — should be *duae ancillae*.
+
+## Exercise menu
+
+1. **Genitive drill**: "Give gen. sg. and gen. pl. of *puella*." → *puellae, puellārum.*
+2. **Possession question**: "How do you say 'the master of the slaves'?" → *dominus servōrum.*
+3. **PENSVM A fill-in**: "Aemilia est māter Mārc___ et Quīnt___ et Iūli___." (answer: -ī, -ī, -ae)
+4. **PENSVM C Q&A**: "Cuius pater est Iūlius?" → *Iūlius pater Mārcī et Quīntī et Iūliae est.*
+5. **Vocab fill (PENSVM B)**: "Mēdus et Dāvus duo ___ sunt." → *servī.*
+6. **Spot the error**: "Numerus ancillae magnus est." → should be *ancillārum* (gen. pl., to mean "the number of slave-girls").
+7. **Possessive agreement**: "How would Iūlia say 'my mother'?" → *māter mea.*
+8. **Parse**: present a word in context and ask for case + number (+ gender if ambiguous).
+
+## Session start
+
+Bare (`/llpsi-c2`): "Cap. II — Familia Romana. Focus: genitive sg/pl, gender (m/f/n), *meus/tuus*, and the new question words. Begin?" Then go.
+
+With topic: jump straight in.
+
+After ~6–8 items, offer to continue, switch topic, or move on.