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[Developer] #218 Real Gemma 4 E2B integration via flutter_gemma 0.16.5

Browse Source 
Implements the OQ-1 follow-up to #215 v0.2.0: replace the placeholder
GemmaLlmService stub with a real flutter_gemma 0.16.5 backend driving
Gemma 4 E2B (litert-community/gemma-4-E2B-it-litert-lm, 2.41GB).

Highlights:
- GemmaLlmService.load → FlutterGemma.initialize + installModel.fromFile +
  getActiveModel; idempotent + FileSystemException on missing file.
- generateStructured uses Gemma 4 native function calling via
  createChat(tools: [Tool(...)], toolChoice: required). Stream parsed by
  collectFunctionCall — first FCR wins, ParallelFCR first-call wins,
  TextResponse/ThinkingResponse skipped, errors sanitized to prevent
  prompt leakage.
- main.dart wires _LazyLlmService adapter that resolves to GemmaLlmService
  when ModelLifecycle reports ready, MockLlmService otherwise.
- ai_providers.dart pins real model URL + SHA-256 (181938...39a63c).
- F2 hardening: ModelLifecycle.purge wraps each delete + meta remove in
  try/catch so a single OS-level flake cannot block opt-out.
- Android: INTERNET / FOREGROUND_SERVICE / POST_NOTIFICATIONS permissions
  + R8 proguard-rules.pro keeping MediaPipe / LiteRT / TFLite / protobuf
  JNI entry points (release builds otherwise crash on first inference).

Design-First: fn-gemma_llm_service.md updated to v2 — §C
(_appendSchemaInstruction) deprecated after reading flutter_gemma
0.16.5 source (Gemma 4 SDK injects tool declarations via template;
prompt-side append would double-wrap).

Tests:
- 10 new unit tests for collectFunctionCall covering all 8 fn-spec
  cases + 2 ParallelFunctionCallResponse paths.
- All 81 existing tests still pass.
- flutter analyze: 0 issues.

Refs #218

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
joungmin
2026-06-12 15:18:08 +09:00
parent a1f3c5f85d
commit 9a9eb2abd5
14 changed files with 646 additions and 175 deletions
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253
app/pubspec.lock
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@@ -5,18 +5,18 @@ packages:
dependency: transitive
description:
name: _fe_analyzer_shared
sha256: da0d9209ca76bde579f2da330aeb9df62b6319c834fa7baae052021b0462401f
sha256: "3b19a47f6ea7c2632760777c78174f47f6aec1e05f0cd611380d4593b8af1dbc"
url: "https://pub.dev"
source: hosted
version: "85.0.0"
version: "96.0.0"
analyzer:
dependency: transitive
description:
name: analyzer
sha256: "974859dc0ff5f37bc4313244b3218c791810d03ab3470a579580279ba971a48d"
sha256: "0c516bc4ad36a1a75759e54d5047cb9d15cded4459df01aa35a0b5ec7db2c2a0"
url: "https://pub.dev"
source: hosted
version: "7.7.1"
version: "10.2.0"
args:
dependency: transitive
description:
@@ -33,6 +33,14 @@ packages:
url: "https://pub.dev"
source: hosted
version: "2.13.1"
background_downloader:
dependency: transitive
description:
name: background_downloader
sha256: aceacec2b2a72ec3a8862ab5895fcbbc71ab33765f3619d57963f3110dd268e3
url: "https://pub.dev"
source: hosted
version: "9.5.5"
boolean_selector:
dependency: transitive
description:
@@ -45,18 +53,18 @@ packages:
dependency: transitive
description:
name: build
sha256: "51dc711996cbf609b90cbe5b335bbce83143875a9d58e4b5c6d3c4f684d3dda7"
sha256: a156715e7cd728130c592f30552575908aae5b100005fbc1f0fb16b3c03a3d10
url: "https://pub.dev"
source: hosted
version: "2.5.4"
version: "4.0.6"
build_config:
dependency: transitive
description:
name: build_config
sha256: "4ae2de3e1e67ea270081eaee972e1bd8f027d459f249e0f1186730784c2e7e33"
sha256: "4070d2a59f8eec34c97c86ceb44403834899075f66e8a9d59706f8e7834f6f71"
url: "https://pub.dev"
source: hosted
version: "1.1.2"
version: "1.3.0"
build_daemon:
dependency: transitive
description:
@@ -65,30 +73,14 @@ packages:
url: "https://pub.dev"
source: hosted
version: "4.1.1"
build_resolvers:
dependency: transitive
description:
name: build_resolvers
sha256: ee4257b3f20c0c90e72ed2b57ad637f694ccba48839a821e87db762548c22a62
url: "https://pub.dev"
source: hosted
version: "2.5.4"
build_runner:
dependency: "direct dev"
description:
name: build_runner
sha256: "382a4d649addbfb7ba71a3631df0ec6a45d5ab9b098638144faf27f02778eb53"
sha256: "1523ce62448ebac2c15a8ba5fbad8acac169788658a7dd2a1c2d9c2a9318b9a6"
url: "https://pub.dev"
source: hosted
version: "2.5.4"
build_runner_core:
dependency: transitive
description:
name: build_runner_core
sha256: "85fbbb1036d576d966332a3f5ce83f2ce66a40bea1a94ad2d5fc29a19a0d3792"
url: "https://pub.dev"
source: hosted
version: "9.1.2"
version: "2.15.0"
built_collection:
dependency: transitive
description:
@@ -149,18 +141,10 @@ packages:
dependency: transitive
description:
name: code_assets
sha256: bf394f466ba9205f1812a0433b392d6af280f155f56651eda7c18cc32ed493b8
sha256: "83ccdaa064c980b5596c35dd64a8d3ecc68620174ab9b90b6343b753aa721687"
url: "https://pub.dev"
source: hosted
version: "1.2.1"
code_builder:
dependency: transitive
description:
name: code_builder
sha256: "6a6cab2ba4680d6423f34a9b972a4c9a94ebe1b62ecec4e1a1f2cba91fd1319d"
url: "https://pub.dev"
source: hosted
version: "4.11.1"
version: "1.0.0"
collection:
dependency: transitive
description:
@@ -193,30 +177,38 @@ packages:
url: "https://pub.dev"
source: hosted
version: "1.0.9"
dart_sentencepiece_tokenizer:
dependency: transitive
description:
name: dart_sentencepiece_tokenizer
sha256: "85825632845cf6427ea0cd13dfba96b4341cf63525165155e5b9b97011239289"
url: "https://pub.dev"
source: hosted
version: "1.3.2"
dart_style:
dependency: transitive
description:
name: dart_style
sha256: "8a0e5fba27e8ee025d2ffb4ee820b4e6e2cf5e4246a6b1a477eb66866947e0bb"
sha256: "29f7ecc274a86d32920b1d9cfc7502fa87220da41ec60b55f329559d5732e2b2"
url: "https://pub.dev"
source: hosted
version: "3.1.1"
version: "3.1.7"
drift:
dependency: "direct main"
description:
name: drift
sha256: "540cf382a3bfa99b76e51514db5b0ebcd81ce3679b7c1c9cb9478ff3735e47a1"
sha256: "6cc0b623c0e83f7080524d8396e9301b1d78b9c66a4fdceeb0f798211303254c"
url: "https://pub.dev"
source: hosted
version: "2.28.2"
version: "2.34.0"
drift_dev:
dependency: "direct dev"
description:
name: drift_dev
sha256: "68c138e884527d2bd61df2ade276c3a144df84d1adeb0ab8f3196b5afe021bd4"
sha256: "9cfff1576b49725da0d32c040651a41ae195e8c4af8d8da301593e41d7abc2f7"
url: "https://pub.dev"
source: hosted
version: "2.28.0"
version: "2.34.0"
fake_async:
dependency: transitive
description:
@@ -254,6 +246,14 @@ packages:
description: flutter
source: sdk
version: "0.0.0"
flutter_gemma:
dependency: "direct main"
description:
name: flutter_gemma
sha256: "984960b54bbc0ff7e36cf568a02652b1d4bc016d6c75575b027fb6102fab48c3"
url: "https://pub.dev"
source: hosted
version: "0.16.5"
flutter_lints:
dependency: "direct dev"
description:
@@ -275,30 +275,11 @@ packages:
description: flutter
source: sdk
version: "0.0.0"
freezed:
dependency: "direct dev"
description:
name: freezed
sha256: "59a584c24b3acdc5250bb856d0d3e9c0b798ed14a4af1ddb7dc1c7b41df91c9c"
url: "https://pub.dev"
source: hosted
version: "2.5.8"
freezed_annotation:
dependency: "direct main"
description:
name: freezed_annotation
sha256: c2e2d632dd9b8a2b7751117abcfc2b4888ecfe181bd9fca7170d9ef02e595fe2
url: "https://pub.dev"
source: hosted
version: "2.4.4"
frontend_server_client:
flutter_web_plugins:
dependency: transitive
description:
name: frontend_server_client
sha256: f64a0333a82f30b0cca061bc3d143813a486dc086b574bfb233b7c1372427694
url: "https://pub.dev"
source: hosted
version: "4.0.0"
description: flutter
source: sdk
version: "0.0.0"
glob:
dependency: transitive
description:
@@ -319,10 +300,10 @@ packages:
dependency: transitive
description:
name: hooks
sha256: "9a62a50b50b769a737bc0a8ff381f333529df3ab746b2f6b02e83760231455ba"
sha256: "025f060e86d2d4c3c47b56e33caf7f93bf9283340f26d23424ebcfccf34f621e"
url: "https://pub.dev"
source: hosted
version: "2.0.2"
version: "1.0.3"
http:
dependency: "direct main"
description:
@@ -371,14 +352,6 @@ packages:
url: "https://pub.dev"
source: hosted
version: "1.0.1"
js:
dependency: transitive
description:
name: js
sha256: "53385261521cc4a0c4658fd0ad07a7d14591cf8fc33abbceae306ddb974888dc"
url: "https://pub.dev"
source: hosted
version: "0.7.2"
json_annotation:
dependency: "direct main"
description:
@@ -391,10 +364,18 @@ packages:
dependency: "direct dev"
description:
name: json_serializable
sha256: c50ef5fc083d5b5e12eef489503ba3bf5ccc899e487d691584699b4bdefeea8c
sha256: "5b89c1e32ae3840bb20a1b3434e3a590173ad3cb605896fb0f60487ce2f8104e"
url: "https://pub.dev"
source: hosted
version: "6.9.5"
version: "6.11.4"
large_file_handler:
dependency: transitive
description:
name: large_file_handler
sha256: "1657db12b4591242b186c23eee437997be91e655ab0d803fd74829074460757f"
url: "https://pub.dev"
source: hosted
version: "0.4.0"
leak_tracker:
dependency: transitive
description:
@@ -427,6 +408,14 @@ packages:
url: "https://pub.dev"
source: hosted
version: "6.1.0"
local_hnsw:
dependency: transitive
description:
name: local_hnsw
sha256: "7fb0988e3f850121774d9dfe94068f843d87908d6b1e9ed5039710d8d9ae3f7a"
url: "https://pub.dev"
source: hosted
version: "1.0.0"
logging:
dependency: transitive
description:
@@ -467,14 +456,30 @@ packages:
url: "https://pub.dev"
source: hosted
version: "2.0.0"
mutex:
dependency: transitive
description:
name: mutex
sha256: "8827da25de792088eb33e572115a5eb0d61d61a3c01acbc8bcbe76ed78f1a1f2"
url: "https://pub.dev"
source: hosted
version: "3.1.0"
native_toolchain_c:
dependency: transitive
description:
name: native_toolchain_c
sha256: "6ba77bb18063eebe9de401f5e6437e95e1438af0a87a3a39084fbd37c90df572"
url: "https://pub.dev"
source: hosted
version: "0.17.6"
objective_c:
dependency: transitive
description:
name: objective_c
sha256: "6cb691c686fa2838c6deb34980d426145c2a5d537491cb83d463c33cdbc726ed"
sha256: "100a1c87616ab6ed41ec263b083c0ef3261ee6cd1dc3b0f35f8ddfa4f996fe52"
url: "https://pub.dev"
source: hosted
version: "9.4.1"
version: "9.3.0"
package_config:
dependency: transitive
description:
@@ -603,6 +608,62 @@ packages:
url: "https://pub.dev"
source: hosted
version: "2.6.1"
shared_preferences:
dependency: transitive
description:
name: shared_preferences
sha256: c3025c5534b01739267eb7d76959bbc25a6d10f6988e1c2a3036940133dd10bf
url: "https://pub.dev"
source: hosted
version: "2.5.5"
shared_preferences_android:
dependency: transitive
description:
name: shared_preferences_android
sha256: "93ae5884a9df5d3bb696825bceb3a17590754548b5d740eba51500afc8d088f5"
url: "https://pub.dev"
source: hosted
version: "2.4.26"
shared_preferences_foundation:
dependency: transitive
description:
name: shared_preferences_foundation
sha256: "4e7eaffc2b17ba398759f1151415869a34771ba11ebbccd1b0145472a619a64f"
url: "https://pub.dev"
source: hosted
version: "2.5.6"
shared_preferences_linux:
dependency: transitive
description:
name: shared_preferences_linux
sha256: "580abfd40f415611503cae30adf626e6656dfb2f0cee8f465ece7b6defb40f2f"
url: "https://pub.dev"
source: hosted
version: "2.4.1"
shared_preferences_platform_interface:
dependency: transitive
description:
name: shared_preferences_platform_interface
sha256: "649dc798a33931919ea356c4305c2d1f81619ea6e92244070b520187b5140ef9"
url: "https://pub.dev"
source: hosted
version: "2.4.2"
shared_preferences_web:
dependency: transitive
description:
name: shared_preferences_web
sha256: c49bd060261c9a3f0ff445892695d6212ff603ef3115edbb448509d407600019
url: "https://pub.dev"
source: hosted
version: "2.4.3"
shared_preferences_windows:
dependency: transitive
description:
name: shared_preferences_windows
sha256: "94ef0f72b2d71bc3e700e025db3710911bd51a71cefb65cc609dd0d9a982e3c1"
url: "https://pub.dev"
source: hosted
version: "2.4.1"
shelf:
dependency: transitive
description:
@@ -628,18 +689,18 @@ packages:
dependency: transitive
description:
name: source_gen
sha256: "35c8150ece9e8c8d263337a265153c3329667640850b9304861faea59fc98f6b"
sha256: ec37cc0e6694374cbef59ed79685572c870a54ede6fa30a3e420feb3adffea02
url: "https://pub.dev"
source: hosted
version: "2.0.0"
version: "4.2.3"
source_helper:
dependency: transitive
description:
name: source_helper
sha256: a447acb083d3a5ef17f983dd36201aeea33fedadb3228fa831f2f0c92f0f3aca
sha256: "4227d54ceefd0bb8ca4c8fcb96e1719dc53f1ee1b6e2ca9d7a6069da160e4eae"
url: "https://pub.dev"
source: hosted
version: "1.3.7"
version: "1.3.12"
source_span:
dependency: transitive
description:
@@ -652,10 +713,10 @@ packages:
dependency: transitive
description:
name: sqlite3
sha256: "3145bd74dcdb4fd6f5c6dda4d4e4490a8087d7f286a14dee5d37087290f0f8a2"
sha256: "9488c7d2cdb1091c91cacf7e207cff81b28bff8e366f042bad3afe7d34afe189"
url: "https://pub.dev"
source: hosted
version: "2.9.4"
version: "3.3.2"
sqlite3_flutter_libs:
dependency: "direct main"
description:
@@ -668,10 +729,10 @@ packages:
dependency: transitive
description:
name: sqlparser
sha256: "57090342af1ce32bb499aa641f4ecdd2d6231b9403cea537ac059e803cc20d67"
sha256: "40bdddb306a727be9ce510bd2d2b9a6c9db6c586d846ef7b22e3990a2b24f02d"
url: "https://pub.dev"
source: hosted
version: "0.41.2"
version: "0.44.5"
stack_trace:
dependency: transitive
description:
@@ -728,14 +789,6 @@ packages:
url: "https://pub.dev"
source: hosted
version: "0.7.11"
timing:
dependency: transitive
description:
name: timing
sha256: "62ee18aca144e4a9f29d212f5a4c6a053be252b895ab14b5821996cff4ed90fe"
url: "https://pub.dev"
source: hosted
version: "1.0.2"
typed_data:
dependency: transitive
description:
@@ -752,6 +805,14 @@ packages:
url: "https://pub.dev"
source: hosted
version: "2.0.1"
uuid:
dependency: transitive
description:
name: uuid
sha256: "1fef9e8e11e2991bb773070d4656b7bd5d850967a2456cfc83cf47925ba79489"
url: "https://pub.dev"
source: hosted
version: "4.5.3"
vector_math:
dependency: transitive
description:
@@ -818,4 +879,4 @@ packages:
version: "3.1.3"
sdks:
dart: ">=3.12.2 <4.0.0"
flutter: ">=3.38.4"
flutter: ">=3.44.0"