feat: dynamic git memory system

.pi/tasks/tasks-019f173a-fbb0-7341-9b39-2eb5ca609684.json

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+{
+  "nextId": 18,
+  "tasks": []
+}

scripts/bench_heavy_repo_indexing.py

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+from __future__ import annotations
+
+import json
+import shutil
+import sys
+import time
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
+
+from sia_code.cli import create_backend
+from sia_code.config import Config
+from sia_code.indexer.coordinator import IndexingCoordinator
+from sia_code.storage.multi_repo import (
+    build_repo_config,
+    estimate_chunks,
+    estimate_indexable_files,
+    estimate_semantic_vectors,
+    recommend_repo_timeout_seconds,
+)
+
+
+def bench_repo(repo_name: str) -> dict:
+    repo = Path.home() / 'dev' / 'ai.platform' / repo_name
+    out = Path.home() / 'dev' / 'ai.platform' / '.sia-code' / 'bench' / repo_name
+    if out.exists():
+        shutil.rmtree(out)
+    out.mkdir(parents=True, exist_ok=True)
+
+    cfg = build_repo_config(Config(), repo.name)
+    cfg.save(out / 'config.json')
+    files = estimate_indexable_files(repo, cfg)
+    chunks = estimate_chunks(repo, cfg)
+    vectors = estimate_semantic_vectors(repo, cfg)
+    timeout = recommend_repo_timeout_seconds(files, vectors)
+
+    backend = create_backend(out, cfg, suppress_stdout_notices=True)
+    backend.create_index()
+    coord = IndexingCoordinator(cfg, backend)
+    t0 = time.time()
+    stats = coord.index_directory(repo)
+    elapsed = time.time() - t0
+    backend.close()
+    return {
+        'repo': repo_name,
+        'model': cfg.embedding.model,
+        'dims': cfg.embedding.dimensions,
+        'granularity': cfg.embedding.granularity,
+        'max_vectors_per_file': cfg.embedding.max_vectors_per_file,
+        'files': files,
+        'chunks': chunks,
+        'vectors': vectors,
+        'timeout': timeout,
+        'elapsed_s': round(elapsed, 2),
+        'stats': stats,
+    }
+
+
+if __name__ == '__main__':
+    repos = sys.argv[1:] or [
+        'ai.platform.forks.ai-toolkit',
+        'ai.platform.annotation-suite.cvat',
+    ]
+    for repo_name in repos:
+        print(json.dumps(bench_repo(repo_name)), flush=True)