refactor(agent): use agent-neutral runtime names

Assisted-by: Codex

docs/prds/0020-start-and-attach-from-dashboard.md

@@ -154,7 +154,7 @@ Today's flow:
 ```
 ./cli.py start agent
   └─ with backend.launch(plan) as bottle:        ← bottle alive while inside `with`
-       bottle.exec_claude([...], tty=True)       ← blocks until claude exits
+       bottle.exec_agent([...], tty=True)       ← blocks until claude exits
      # context exits → compose down → state cleanup
 ```
 
@@ -171,7 +171,7 @@ The proposed dashboard-driven flow:
 
      # operator interacts via:
      curses.endwin()
-     bottle.exec_claude([...], tty=True)         ← blocks; returns on Ctrl-D
+     bottle.exec_agent([...], tty=True)         ← blocks; returns on Ctrl-D
      stdscr.refresh()
      # bottle is STILL ALIVE — only the claude process exited
 
@@ -265,7 +265,7 @@ if modal proves fiddly.
 Same handoff pattern the new-agent flow uses. For an agent the
 dashboard started this session, the dashboard holds the
 `DockerBottle` handle in its `bottles` dict and calls
-`bottle.exec_claude(...)`. For an agent it discovered via
+`bottle.exec_agent(...)`. For an agent it discovered via
 `list_active_slugs` (previous-dashboard or external start),
 the dashboard synthesizes a one-shot `DockerBottle` from the
 slug — container name is `bot-bottle-<slug>`, no prompt
@@ -304,17 +304,17 @@ acting surface, not a lifetime owner.
 
 Sized for one PR each.
 
-1. **Refactor `_launch_bottle` so the launch + exec_claude
+1. **Refactor `_launch_bottle` so the launch + exec_agent
    pieces are separable.** Today's `cli/start.py` runs both
    inside one function. Extract `prepare_with_preflight(spec,
-   *, render_preflight, prompt_yes)` and `attach_claude(bottle,
+   *, render_preflight, prompt_yes)` and `attach_agent(bottle,
    *, remote_control)`. The CLI's existing one-shot use binds
    them as before; the dashboard binds them with curses-aware
    render + prompt callables. No behavior change.
 2. **Agent picker modal + new-agent flow.** New key `n` opens
    the picker; `prepare_with_preflight` runs against the
    selected agent; on Y, `backend.launch(plan)` enters the
-   dashboard's ExitStack; handoff invokes `attach_claude`.
+   dashboard's ExitStack; handoff invokes `attach_agent`.
 3. **Re-attach via Enter on owned agents-pane row.** Looks up
    the slug in the dashboard's `bottles` map; if present →
    handoff; else → status-line hint pointing at `./cli.py
@@ -390,7 +390,7 @@ Sized for one PR each.
 - PRD 0019 — active-agents pane + selection model (the
   agents-pane row the re-attach + stop verbs hook into)
 - `docs/research/claude-code-pane-in-dashboard.md` — option 1
-  (handoff) is what `attach_claude` implements here; options 2
+  (handoff) is what `attach_agent` implements here; options 2
   / 3 are out of scope for this PRD
 - `bot_bottle/cli/start.py:_launch_bottle` — the function
   chunk 1 extracts the prepare + attach pieces out of