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feat(shared-llm): bump mana-server default model to gemma4:e4b

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Two surprises came out of "why do we still use Gemma 3 instead of 4":

1. The hardcoded default in ManaServerBackend was `gemma3:4b`, which
   was even smaller than mana-llm's actual server-side default of
   `gemma3:12b`. My initial guess from docs/LOCAL_LLM_MODELS.md was
   conservative.

2. The mana-llm OLLAMA_URL points at host.docker.internal:13434,
   which is NOT the Mac Mini's local Ollama — it's a Python TCP
   forwarder (~/gpu-proxy.py) that proxies to 192.168.178.11:11434
   on the Windows GPU server. So title generation has been running
   on the RTX 3090 the whole time, not on the M4 Metal GPU. The
   Mac Mini's brew-installed ollama 0.15.4 wasn't even being used
   for inference — only as a CLI to inspect the proxied Ollama.

To get to Gemma 4, both Ollama instances needed an upgrade:
  - Mac Mini brew  : 0.15.4 → 0.20.4 (cosmetic, the binary isn't on
                     the inference path; upgraded for consistency)
  - GPU server     : 0.18.2 → 0.20.4 via winget. Required restarting
                     the daemon via the OllamaServe scheduled task
                     that was already configured.

Then `ollama pull gemma4:e4b` on the GPU server (9.6 GB, ~10 min on
the LAN). Verified end-to-end via the proxy with a real chat
completion request to mana-llm — gemma4:e4b answered with a clean
4-word German title for a sample voice memo prompt:

  prompt: "Erstelle einen kurzen 3-Wort Titel für: Es ist ein
           schöner Tag heute am 9. April"
  → "Schöner Tag, neuntes April"

Changes in this commit:

  packages/shared-llm/src/backends/mana-server.ts
    - defaultModel: 'gemma3:4b' → 'gemma4:e4b'
    - Updated docstring to explain why E4B is the right Mana-Server
      tier default: 9.6 GB on disk, 128K context, "Effective 4B"
      arch punches above its weight class for German prompts, and
      the family stays consistent with the browser tier (Gemma 4
      E2B is the smaller sibling) so the source label and prompt
      behavior remain coherent across tiers.

  apps/mana/apps/web/src/lib/modules/memoro/views/DetailView.svelte
    - TITLE_SOURCE_LABELS map updated:
        browser     → "Auf deinem Gerät (Gemma 4 E2B)" (was "(Gemma 4)")
        mana-server → "Mana-Server (Gemma 4 E4B)" (was "(gemma3:4b)")
    - The label now reflects that BOTH the browser and the mana-server
      tier are running Gemma 4 variants, which is more honest than
      the previous mix.

Did NOT change:
  - The Ollama OLLAMA_DEFAULT_MODEL env var in docker-compose.macmini.yml
    (still gemma3:12b). That's the fallback for callers who don't
    specify a model in their request. Our generate-title task always
    sends an explicit model string, so it's unaffected. Bumping the
    global default is a separate decision — it would change behavior
    for the playground module and any other consumer that relies on
    the implicit fallback.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Till JS 2026-04-09 16:06:33 +02:00
parent df72a92b4c
commit c9e16243c8
2 changed files with 20 additions and 11 deletions
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21
packages/shared-llm/src/backends/mana-server.ts
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@ -2,18 +2,27 @@
* Mana-server backend — calls services/mana-llm with an Ollama model
* string. mana-llm's ProviderRouter recognizes plain Ollama model names
* (no provider prefix) and routes them to the local Ollama instance on
* the Mac Mini, with automatic Gemini fallback if Ollama is overloaded.
* the Mac Mini (running on the M4's Metal GPU), with automatic Gemini
* fallback if Ollama is overloaded.
*
* The default model is gemma3:4b — same model family as the browser
* tier (Gemma 4 E2B is the smaller sibling), so prompts behave
* consistently when a task auto-falls between tiers.
* The default model is gemma4:e4b — Google's Gemma 4 "Effective 4B"
* variant, released 2026-04-02. Same family as @mana/local-llm's
* browser tier model (Gemma 4 E2B is the smaller sibling) so prompts
* behave consistently when a task auto-falls between tiers. e4b is
* the right Mana-Server default because:
* - 9.6 GB on disk fits comfortably on the M4's 16 GB unified memory
* - 128K context window covers all current title/summarize tasks
* - The "Effective 4B" architecture punches well above its weight
* class (better than gemma3:4b on most German prompts)
* - The tier name we surface in the source label stays "Gemma 4"
* family for both browser and mana-server, so the UX is coherent
*/
import type { GenerateResult, LlmBackend, LlmTaskRequest } from '../types';
import { callManaLlmStreaming, resolveLlmBaseUrl } from './remote';
export interface ManaServerBackendOptions {
/** Ollama model name to send to mana-llm. Default 'gemma3:4b'. */
/** Ollama model name to send to mana-llm. Default 'gemma4:e4b'. */
defaultModel?: string;
}
@ -22,7 +31,7 @@ export class ManaServerBackend implements LlmBackend {
private readonly defaultModel: string;
constructor(opts: ManaServerBackendOptions = {}) {
this.defaultModel = opts.defaultModel ?? 'gemma3:4b';
this.defaultModel = opts.defaultModel ?? 'gemma4:e4b';
}
isAvailable(): boolean {