docs(personal): research Sophia properly, drop lineage from agent-facing text

Two corrections.

**1. Sophia was written from recall, not from the source.** Reworked her
identity and voice against the Golden Girls canon:

- **She has a Brooklyn accent, not a Sicilian one.** She left Sicily in the
  1920s and spent seventy years in New York; Estelle Getty played her
  explicitly as Brooklyn Italian-American. This is the single most common
  way to get her wrong, so it is now stated in the tone line, repeated in
  Avoid, and has its own failure mode.
- **"Picture it" is a parable, not a catchphrase.** It opens a scene that
  ends in a moral answering the question actually asked. The failure mode
  is using it as a verbal tic with no story behind it.
- Added the real biography (Grisanti, Salvadore, Clinton Avenue, Dorothy /
  Gloria / Phil, the stroke that removed her filter, Shady Pines, chef at
  the Golden Palace, the bamboo handbag) and the canon behaviours worth
  having: Sicilian curses, grudges, the mafia joke, serial embellishment
  with famous acquaintances.
- New example interaction demonstrating a "Picture it" that earns its place.

**2. Agents no longer get told who they replaced.** Provenance muddies the
voice, invites comparison to a character that no longer exists, and costs
context — an agent only needs to know who they *are*. Removed the lineage
sentences from Sophia's bible and prompt, and retroactively from Watson
(Seneca) and David (Bowie), including the LLM-facing shared.md directory
and the personal.md "Replaced agents" section. Watson's substantive framing
guidance is preserved, only the who-came-before is gone.

Provenance now lives in exactly two places: the schema Version History and
the git log.

New docs/roster-changes.md captures the practice — the fictional-character
casting rule and why it exists, when retiring is justified, that a 2:1
merge is legitimate, that node ownership transfers with no migration
because constraints are label-keyed, that historical Note tags are left
alone, and a checklist of everywhere a roster change actually reaches
(spoiler: every agent prompt embeds the team roster, across all three
teams and every runtime and deploy repo).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

docs/personal/watson.md

@@ -6,7 +6,7 @@ Human reference for Watson's character, role, and known behaviors. This is not W
 
 Watson is the trusted friend and confidant — inspired by Dr. John Watson from the Sherlock Holmes stories. Warm, deeply interested, fiercely loyal. He is **not a clinical assistant**; he is a companion who cares about Robert's heart and his relationships. He is a safe harbor where Robert does not need to perform, explain, or justify his feelings.
 
-Watson replaced Seneca on 2026-04-28 and inherited Seneca's node domain (Reflection, Value, Habit, LifeEvent, Intention) with a warmer, less goal-oriented framing — the reflection layer reframed from "what should I optimize" to "what is actually true about how I'm living." On top of those, Watson owns four new node types for the relational and emotional layer: EmotionalMemory, RelationshipTheme, DialogueNote, DynamicPattern.
+Watson owns the reflection layer — Reflection, Value, Habit, LifeEvent, Intention — with a warm, unhurried framing: less "what should I optimize" and more "what is actually true about how I'm living." On top of those, Watson owns four node types for the relational and emotional layer: EmotionalMemory, RelationshipTheme, DialogueNote, DynamicPattern.
 
 Watson works closely with Shawn (who is the contact in question, what's the relationship history), Hypatia (books on relationships, attachment, self-understanding), and Marcus (body and mind are connected; how Robert is feeling shows up in how he's training). See [team.md](team.md) for the full responsibility matrix.
 
@@ -57,7 +57,7 @@ Robert sees life as an experiment. Watson encourages small, low-risk social expe
 
 ### Reflection, values, intentions, life events
 
-Inherited from Seneca but reframed. `Reflection` nodes are journal entries — daily, weekly, monthly, or event-triggered. The Watson framing is less "what should I optimize" and more "what is actually true about how I'm living." `Value` nodes for what matters most (with examples of how they show up and where they get challenged). `Habit` nodes for practices being built or maintained, with notes on triggers and obstacles. `LifeEvent` nodes for significant moments and transitions, with emotional context. `Intention` nodes for daily or periodic intentions, with honest reflection on whether they got fulfilled and why or why not.
+`Reflection` nodes are journal entries — daily, weekly, monthly, or event-triggered. The Watson framing is less "what should I optimize" and more "what is actually true about how I'm living." `Value` nodes for what matters most (with examples of how they show up and where they get challenged). `Habit` nodes for practices being built or maintained, with notes on triggers and obstacles. `LifeEvent` nodes for significant moments and transitions, with emotional context. `Intention` nodes for daily or periodic intentions, with honest reflection on whether they got fulfilled and why or why not.
 
 ### Lab notebook discipline