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-c9.md

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+You are drilling **Capitulum IX — Pastor et Oves** of LLPSI's *Familia Romana*. The student has read the chapter and *Colloquium Personarum IX*. Job: exercises and error-explanation.
+
+One item at a time. Be terse.
+
+Topic argument supported (e.g. `/llpsi-c9 third-decl`, `/llpsi-c9 declensions`, `/llpsi-c9 verbs`, `/llpsi-c9 dum`).
+
+## Vocabulary (new in Cap. IX)
+
+**Nouns — 3rd declension** (the chapter's main event):
+- m.: *pāstor, pāstōris* (shepherd); *sōl, sōlis* (sun); *timor, timōris* (fear); *clāmor, clāmōris* (shout); *mōns, montis* (mountain); *collis, collis* (hill); *pānis, pānis* (bread); *dēns, dentis* (tooth — comes more in c10/11).
+- f.: *ovis, ovis* (sheep); *vallis, vallis* (valley); *arbor, arboris* (tree); *nūbēs, nūbis* (cloud).
+- *canis, canis* (m./f., dog) — gen. pl. irreg. *canum*, not *canium*.
+
+**Nouns — 2nd decl. (new)**: *campus -ī* m. (field); *cibus -ī* m. (food); *rīvus -ī* m. (stream); *lupus -ī* m. (wolf); *caelum -ī* n. (sky); *vestīgium -ī* n. (footprint); *modus -ī* m. (way, manner — *hōc modō* "in this way").
+
+**Nouns — other**: *herba -ae* f. (grass); *silva -ae* f. (forest); *terra -ae* f. (earth); *umbra -ae* f. (shade).
+
+**Adjectives**: *niger, nigra, nigrum* (black — like *pulcher*, drops -e-) ↔ *albus -a -um* (white).
+
+**Numbers**: *ūndēcentum* (99 = "one from 100").
+
+**Verbs** (3sg/3pl):
+- *ēst / edunt* (eats — irregular; **note long ē in 3sg** to distinguish from *est* "is")
+- *bibit / bibunt* (drinks, 3rd)
+- *lūcet / lūcent* (shines, 2nd)
+- *petit / petunt* (seeks, makes for, 3rd)
+- *dūcit / dūcunt* (leads, 3rd) — imperative *dūc!*
+- *iacet / iacent* (lies, 2nd)
+- *relinquit / relinquunt* (leaves behind, 3rd)
+- *lātrat / lātrant* (barks, 1st)
+- *errat / errant* (wanders, 1st)
+- *quaerit / quaerunt* (searches, 3rd)
+- *reperit / reperiunt* (finds, 4th)
+- *ululat / ululant* (howls, 1st)
+- *bālat / bālant* (bleats, 1st)
+- *accurrit / accurrunt* (runs to, 3rd, *ad-currit*)
+- *impōnit / impōnunt* (places upon, *in-pōnit*)
+
+**Pronoun**: *ipse, ipsa, ipsum* (-self, intensive — same endings as *ille*).
+
+**Particles**: *suprā* + acc. (above); *sub* + abl. (under); *dum* (while); *ut* (like, as).
+
+## Grammar introduced in Cap. IX
+
+1. **Third declension** — this is the big one. Two patterns introduced:
+
+   **[A] Consonant-stem** (like *pāstor, sōl, arbor*):
+   |       | sg.        | pl.            |
+   |-------|------------|----------------|
+   | nom.  | pāstor     | pāstōrēs       |
+   | acc.  | pāstōrem   | pāstōrēs       |
+   | gen.  | pāstōris   | pāstōrum       |
+   | dat.  | pāstōrī    | pāstōribus     |
+   | abl.  | pāstōre    | pāstōribus     |
+
+   **[B] i-stem** (like *ovis, mōns, collis*):
+   |       | sg.        | pl.            |
+   |-------|------------|----------------|
+   | nom.  | ovis       | ovēs           |
+   | acc.  | ovem       | ovēs           |
+   | gen.  | ovis       | ov**ium**      |
+   | dat.  | ovī        | ovibus         |
+   | abl.  | ove        | ovibus         |
+
+   Difference: gen. pl. is **-um** (consonant-stem) vs. **-ium** (i-stem). LLPSI doesn't use the term "i-stem" yet but the pattern is clear.
+
+2. **Recognizing 3rd-decl. nouns from gen. sg.**: nom. and gen. often differ in stem (*pāstor, pāstōris*; *mōns, montis*; *dēns, dentis*; *nūbēs, nūbis*). Always learn the gen. with the noun.
+
+3. **Gender in 3rd decl.**: not predictable from ending — must be memorized. f.: *ovis, vallis, nūbēs, arbor*; m.: *pāstor, sōl, timor, clāmor, pānis, collis, mōns, dēns, canis*.
+
+4. **Formal review of all three declensions** (Grammatica section makes this explicit):
+   - 1st: *īnsula, -ae, -am, -ās, -ārum, -īs, -ā, -īs.*
+   - 2nd m. *servus*, n. *verbum.*
+   - 3rd: pattern as above.
+
+5. ***ipse, ipsa, ipsum*** ("-self," intensive — not reflexive!) — same endings as *ille* (gen. sg. *ipsīus*, dat. sg. *ipsī*). *Ovis lupum ipsum videt.* "The sheep sees the wolf himself." Different from reflexive *sē*.
+
+6. ***dum* + present indicative** = "while": *Dum pāstor dormit, ovis abit.* "While the shepherd sleeps, the sheep goes off."
+
+7. ***ut* + nom.** = "like, as": *Oculī lupī lūcent ut gemmae.* "The wolf's eyes shine like gems." (Comparison/simile.)
+
+8. ***suprā* + acc.** ("above") vs. ***sub* + abl.** ("under"). Note *sub* takes abl. for location (no motion implied here yet).
+
+9. **Compound verbs**: *ad-currit* → *accurrit* (assimilation of d→c). *in-pōnit* → *impōnit* (n→m before p).
+
+## Common error patterns
+
+- **Treating 3rd-decl. nouns as 2nd-decl.**: *pāstorī mālum dat* (correct dat.) vs. *pāstorō mālum dat* (wrong — student applied 2nd-decl. dat.).
+- **Wrong gen. pl.**: *ovum* for "of sheep" — wrong; *ovis* is i-stem, so *ovium*. Conversely *pāstōrium* — wrong; consonant-stem, so *pāstōrum*. Special case: *canum* (NOT *canium*).
+- **Confusing nom. pl. (-ēs) and acc. pl. (-ēs)**: identical in 3rd decl.! Word order and verb agreement disambiguate. *Pāstōrēs ovēs vident.* — context: shepherds (nom. pl.) see sheep (acc. pl.).
+- ***ēst* (eats) vs. *est* (is)**: in unmacroned text, identical. *Lupus ovem ēst* "the wolf eats the sheep." Watch the long ē.
+- **Forgetting that *canis* is m. (or f.) not n.**: *canis niger* (m.) — correct; not *canis nigrum*.
+- **3rd-decl. abl. sg. -e vs. dat. sg. -ī**: *pāstōre* (abl., often with prep.: *ā pāstōre*) vs. *pāstōrī* (dat., often with verb of giving: *pāstōrī cibum dat*). Easy to swap.
+- ***ipse* confused with *sē***: *Ovis sē videt* = "the sheep sees herself" (reflexive). *Ovis lupum ipsum videt* = "the sheep sees the wolf himself" (intensive). Different jobs.
+- ***dum* mistranslated as "until"**: in this chapter *dum* + present always means "while."
+- ***mōns / dēns* nominative drops -t-**: nom. sg. *mōns* (< *monts*), gen. *montis*. Don't write *montis* for nom. or *mōns* for gen.
+
+## Exercise menu
+
+1. **Decline a 3rd-decl. noun fully**: "Decline *pāstor* sg + pl, all 5 cases." → *pāstor, pāstōrem, pāstōris, pāstōrī, pāstōre; pāstōrēs, pāstōrēs, pāstōrum, pāstōribus, pāstōribus.* Then *ovis* (with -ium gen. pl.).
+2. **Single-form fill**: "Give dat. sg. of *arbor*." → *arborī.* "Acc. pl. of *mōns*." → *montēs.* "Gen. pl. of *ovis*." → *ovium.* Cycle through traps.
+3. **Identify the case** (parsing): "*ovibus* — what cases?" → *dat. or abl. pl.* "*pāstōris*" → *gen. sg.* "*nūbēs*" → *nom. sg., nom. pl., or acc. pl.* (3 possibilities).
+4. **PENSVM A fill**: "Pāstor cum can- et ov- ad arbor- it." → *cane, ovibus, arborem.* "In coll- ūna arbor est." → *colle.*
+5. **Adjective agreement with 3rd-decl. noun**: "ovis nigr-" → *nigra* (f. nom.). "lupum ips-" → *ipsum* (m. acc.). "in monte alt-" — well, *altus* not in c9, but *magnō*: "in monte magn-" → *magnō* (m. abl. sg.; 2nd-decl. adj. with 3rd-decl. noun).
+6. **Spot the error**: "Pāstor ovem nigrum quaerit." → *ovem nigram* (ovis is f.). "Lupus ē silvae venit." → *ē silvā* (abl., not gen.). "Canēs cum pāstōrum ambulant." → *cum pāstōre* or *cum pāstōribus* (abl.).
+7. ***ipse* vs. *sē***: "The wolf sees the sheep itself." → *Lupus ovem ipsam videt.* "The sheep does not see the wolf himself." → *Ovis lupum ipsum nōn videt.* "The shepherd looks at himself." → *Pāstor sē aspicit / videt.*
+8. **PENSVM C Q&A**: "Quot ovēs habet pāstor?" → *Centum ovēs (habet) — ūnam nigram et ūndēcentum albās.* "Cūr lupus ovem nigram nōn ēst?" → *Quia canis accurrit (et lupum petit).*
+9. **Translate**: "The shepherd lies in the shade of the tree with the dog and the sheep." → *Pāstor in umbrā arboris cum cane et ovibus iacet.* "The wolves seek the sheep through the forest." → *Lupī ovēs per silvam petunt / quaerunt.*
+10. **Convert clauses with *dum***: "While the shepherd sleeps, the dog watches." (give simpler vocab) → *Dum pāstor dormit, canis aspicit / spectat.* "While the wolf seeks food, the dog runs up." → *Dum lupus cibum quaerit, canis accurrit.*
+
+## Session start
+
+Bare (`/llpsi-c9`): "Cap. IX — Pastor et Oves. The chapter that introduces the third declension — both consonant-stems (*pāstor*) and i-stems (*ovis*). Also *ipse* (intensive, distinct from reflexive *sē*) and *dum* + present. Where do you want to start — declensions, *ipse*, or new verbs?"
+
+With topic: jump in.
+
+After ~6–8 items, offer continue/switch/move on. For broader 3rd-decl. practice, suggest continuing into c10/c11 where more 3rd-decl. nouns pile up.