Surfaces NOMAD's previously-silent model-stacking behavior and enforces a
"one chat model in VRAM at a time" invariant (the embedding model is
always exempt). Addresses Chris's NOMAD3 testing observation that
switching the dropdown in the chat header was invisibly slow on low-VRAM
hardware because the prior model was never unloaded — Ollama would
either evict it under memory pressure or load the new one on CPU after
the runner choked.
Three integration points all funnel through one new helper:
- **User changes the model dropdown** in an active chat session →
confirm modal "Switch to {newModel}? Switching to {newModel} will
start a new chat. Your current conversation stays available in the
sidebar." On confirm, fire `keep_alive: 0` against the previous chat
model, clear active session, set the new selection. Cancel snaps the
visible dropdown back to the previous value (no popup state leaks
into `selectedModel`).
- **User clicks a session in the sidebar** → no popup (system-initiated).
Restore the session's stored model into the dropdown and fire
`unloadChatModels(targetModel)` so anything that isn't the target
gets the unload hint.
- **Chat page first mount** → page-load normalization. Anything stacked
from a prior session gets the unload hint with the current selected
model as the target-to-preserve. Guarded by a ref so it only fires
once per page lifetime; gated on `selectedModel` being populated.
Backend surface is a single new helper and a single new route:
`OllamaService.unloadAllChatModelsExcept(targetModel: string | null)`
→ queries `/api/ps`, filters out (a) the embedding model name
(hardcoded `nomic-embed-text:v1.5` to avoid the RagService circular
import) and (b) `targetModel`, fires `POST /api/generate` with empty
prompt + `keep_alive: 0` in parallel against everything else.
Returns the names that were hinted. Best-effort: network or Ollama
errors are logged and swallowed so callers don't fail on housekeeping.
`POST /api/ollama/unload-chat-models` → thin wrapper validating
`{ targetModel?: string | null }`.
Why `keep_alive: 0` is safe against in-flight inference: per Ollama's
scheduler semantics, the hint sets the post-completion eviction timer
to zero — the runner is not terminated. If Session A is mid-response
on gemma when Session B fires the unload, gemma stays resident until
A's request completes, then evicts. The user-visible worst case is the
race where A's longer-running request re-extends the timer back to the
default and the unload is no-op'd; the next transition (or page reload)
gets another chance, and Ollama's own LRU catches up under memory
pressure regardless. Robust in-flight tracking deferred to a follow-up
if we see stale-state in the wild.
Base `rc`: v1.40.0 will inherit everything from rc.6 via the backmerge.
Frontend tests deferred to a follow-up PR; existing inertia tsconfig
errors are pre-existing and unrelated.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
When a user opens AI Chat with content available but no global ingest
policy yet recorded, surface a one-time banner above the chat header
asking how they want new content handled:
- 'Index existing content' -> sets rag.defaultIngestPolicy=Always and
triggers a sync so pending_decision files queue immediately
- 'Maybe later' -> sets policy=Manual; existing and future content
waits in pending_decision until the user opts in from the KB modal
After either button is clicked the banner never reappears, because both
write the policy KV (the same one #894 manages via the KB modal toggle).
There is intentionally no 'dismiss without deciding' X — that would just
re-show the banner forever.
Backend
- New GET /api/rag/policy-prompt-state returns
{shouldPrompt, hasContent, totalFiles}
- RagService.getPolicyPromptState() reads KVStore('rag.defaultIngestPolicy')
and counts kb_ingest_state rows; shouldPrompt is true only when policy
is null AND scanner has seen >=1 file (avoids prompting on empty NOMADs)
Frontend
- New KbPolicyPromptBanner component (~120 LOC) handles the two-button
decision flow with optimistic loading state, success/error toasts, and
invalidates kbPolicyPromptState + ingestPolicy + embed-jobs + storedFiles
on success
- Mounted in components/chat/index.tsx as the first child of the main
content column so it sits above the chat title bar without taking space
when shouldPrompt is false (renders nothing)
- Reads aiAssistantName from Inertia page props so banner copy matches
the user's chosen assistant name
Stacks on feat/kb-policy-toggle (#894) because the policy KV mechanism
it writes through is introduced there. Both can land in rc.5; this PR
auto-rebases to rc once #894 merges.
Existing users on first upgrade to v1.32.0 will see this banner on first
chat visit post-upgrade — an explicit opt-in moment for content that was
already on disk. New users see it the first time they have curated
content downloaded.
Add a warm charcoal dark mode ("Night Ops") using CSS variable swapping
under [data-theme="dark"]. All 23 desert palette variables are overridden
with dark-mode counterparts, and ~313 generic Tailwind classes (bg-white,
text-gray-*, border-gray-*) are replaced with semantic tokens.
Infrastructure:
- CSS variable overrides in app.css for both themes
- ThemeProvider + useTheme hook (localStorage + KV store sync)
- ThemeToggle component (moon/sun icons, "Night Ops"/"Day Ops" labels)
- FOUC prevention script in inertia_layout.edge
- Toggle placed in StyledSidebar and Footer for access on every page
Color replacements across 50 files:
- bg-white → bg-surface-primary
- bg-gray-50/100 → bg-surface-secondary
- text-gray-900/800 → text-text-primary
- text-gray-600/500 → text-text-secondary/text-text-muted
- border-gray-200/300 → border-border-subtle/border-border-default
- text-desert-white → text-white (fixes invisible text on colored bg)
- Button hover/active states use dedicated btn-green-hover/active vars
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Chris Sherwood
Henry Estela
Jake Turner