Brief 4 of the Wave 1 evidence spine — wire the evidence-context architecture
so every route can project into one shared evidence manifold.
Command registry (1A):
- commandRegistry.ts: useSyncExternalStore-backed command store with a cached
snapshot (referentially stable to avoid render loops); useCommands /
useCommandRegistry; recent-items in localStorage (last 10).
- CommandPalette.tsx: reads from the registry; all ten routes are navigation
commands (was Chat/Proposals/Evals hardcoded); fuzzy filter, recent section,
shortcut badges; Router/Fallback split preserved.
- useGlobalKeyboard.ts: Cmd+K palette, Cmd+I inspector, Cmd+1-0 routes, ? help.
Evidence drawer (1B):
- evidenceContext.tsx: EvidenceSubject union (turn|proposal|artifact|
eval_result|none) + useEvidenceSubject hook + EvidenceProvider above the
router Outlet so inspector state persists across route transitions.
- RightInspector.tsx: five evidence projections (was a null stub); reuses the
Brief 2 primitives (MetadataTable, DigestBadge, Timestamp, badges).
- Shell.tsx: visibility driven by inspectorOpen (collapsed by default); no more
hardcoded collapsed=true.
- KeyboardHelp.tsx: shortcut reference dialog.
- TopBar.tsx: palette open state lifted to Shell via props.
Tests: evidenceContext + RightInspector specs added; CommandPalette keyboard
contract updated for the ten-command navigation set (clamp at both ends).
Deferred (noted in spine doc): per-route register()/setSubject call sites,
action-commands (run eval / copy hash), resizable inspector width.
Verified: tsc -b + vite build green; affected specs pass per-file.
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