@@ -311,3 +311,14 @@ x 必须为正。因阈值停下的调用（`stop_reason="max_budget"`）→ `Mo
 不传上限的现有调用方行为不变：该参数根本不会发给 transport。
 `runtime.trace_recorder` 把阈值与花费持久化到 `model_call` 记录的 `result.max_budget_usd` / `result.cost_usd`
 （未设或未知为 null），包括 transport 抛错的失败记录。
+
+## 2026-09-30 `kb init` 的 adapter 配置
+`knowledge_lifecycle.init`（可选子映射，严格校验，未知键抛 `LifecycleConfigError`）解析为 `InitConfig`，挂在
+`RepoLifecycle.init`（缺省为 `None`）：`seeds`（知识库相对路径，只能是 `general/...` 或 `repos/<其他仓库>/...`，
+不得指向本仓库、不得为绝对路径或含空段/`.`/`..`，不得重复）、`doc_globs`（缺省 `DEFAULT_DOC_GLOBS` =
+`README*`、`docs/**/*.md`（与 `profiles/establish.build_doc_corpus` 一致）加 `CONTRIBUTING.md`、`AGENTS.md`）、
+`source_roots`（缺省取同一 manifest 的 `ut_coverage.source_roots`）、`exclude`、`module_depth`（≥1，缺省 2）、
+`min_module_loc`（≥0，缺省 300）、`pr_window: {count, max_age_days}`（>0，缺省 200 / 180）、`coverage_target`
+（(0, 1]，缺省 0.85）、`budget_usd`（>0，缺省 30）、`judge_call_usd`（≥0，缺省 0.50）。`validate_seeds(init,
+knowledge_root)` 是运行时检查：种子必须是知识树中已存在的文件或目录，解析后不得逃出知识根目录，逐条返回问题。
+解析只做静态校验，不读知识树。测试：`test_kb_init_config.py`。
@@ -8,6 +8,7 @@
 
 from __future__ import annotations
 
+import math
 import re
 from dataclasses import dataclass, field
 from pathlib import Path
@@ -23,8 +24,15 @@
 _KEYS = {
     "enabled", "mode", "knowledge_dir", "intake", "release", "sweep",
     "upstream_visibility", "circuit_breaker", "protected_rules",
-    "calibration_set", "model_dir",
+    "calibration_set", "model_dir", "init",
 }
+_INIT_KEYS = {
+    "seeds", "doc_globs", "source_roots", "exclude", "module_depth", "min_module_loc",
+    "pr_window", "coverage_target", "budget_usd", "judge_call_usd",
+}
+# README* + docs/**/*.md is what profiles/establish.build_doc_corpus reads;
+# the contribution and agent guides carry most cross-doc invariants.
+DEFAULT_DOC_GLOBS = ("README*", "docs/**/*.md", "CONTRIBUTING.md", "AGENTS.md")
 
 
 class LifecycleConfigError(ValueError):
@@ -46,6 +54,22 @@ class ReleaseConfig:
     auditor: str = ""  # plugin path relative to the adapter directory
 
 
+@dataclass(frozen=True)
+class InitConfig:
+    """How ``kb init`` bootstraps the repository's knowledge (design kb-init §3)."""
+    seeds: tuple[str, ...] = ()            # knowledge-relative: general/... or repos/<other>/...
+    doc_globs: tuple[str, ...] = DEFAULT_DOC_GLOBS
+    source_roots: tuple[str, ...] = ()
+    exclude: tuple[str, ...] = ()
+    module_depth: int = 2
+    min_module_loc: int = 300
+    pr_window_count: int = 200
+    pr_window_max_age_days: int = 180
+    coverage_target: float = 0.85
+    budget_usd: float = 30.0
+    judge_call_usd: float = 0.50
+
+
 @dataclass(frozen=True)
 class RepoLifecycle:
     repo: str                      # knowledge repo name, or "general"
@@ -63,6 +87,7 @@ class RepoLifecycle:
     calibration_set: str = ""      # directory relative to the adapter (ships in the wheel)
     model_dir: str = ""
     adapter_dir: Path | None = None
+    init: InitConfig | None = None
 
     @property
     def auto_merge(self) -> bool:
@@ -92,6 +117,96 @@ def _mapping(value: object, where: str, allowed: set[str]) -> dict:
     return value
 
 
+def _strings(value: object, where: str) -> tuple[str, ...]:
+    if value is None:
+        return ()
+    if not isinstance(value, list) or any(not isinstance(v, str) or not v.strip() for v in value):
+        raise LifecycleConfigError(f"{where} must be a list of non-empty strings")
+    return tuple(v.strip() for v in value)
+
+
+def _int(value: object, where: str, *, minimum: int) -> int:
+    if isinstance(value, bool) or not isinstance(value, int) or value < minimum:
+        raise LifecycleConfigError(f"{where} must be an integer >= {minimum}")
+    return value
+
+
+def _number(value: object, where: str) -> float:
+    if isinstance(value, bool) or not isinstance(value, (int, float)) or not math.isfinite(value):
+        raise LifecycleConfigError(f"{where} must be a finite number")
+    return float(value)
+
+
+def _seed_problem(seed: str, repo: str) -> str:
+    parts = seed.split("/")
+    if seed.startswith("/") or "\\" in seed or any(p in ("", ".", "..") for p in parts):
+        return "must be a relative knowledge path without empty, . or .. segments"
+    if parts[0] == GENERAL:
+        return ""
+    if parts[0] == "repos" and len(parts) >= 2 and _NAME.fullmatch(parts[1]):
+        return "names the repository being initialised" if parts[1] == repo else ""
+    return "must start with general/ or repos/<other repo>/"
+
+
+def parse_init(section: object, where: str, *, repo: str, manifest: dict) -> InitConfig | None:
+    """The ``init`` sub-mapping, strictly validated; None when absent."""
+    if section is None:
+        return None
+    data = _mapping(section, where, _INIT_KEYS)
+    seeds = _strings(data.get("seeds"), f"{where}.seeds")
+    for seed in seeds:
+        problem = _seed_problem(seed, repo)
+        if problem:
+            raise LifecycleConfigError(f"{where}.seeds: {seed!r} {problem}")
+    if len(set(seeds)) != len(seeds):
+        raise LifecycleConfigError(f"{where}.seeds has duplicates")
+    if "source_roots" in data:
+        source_roots = _strings(data["source_roots"], f"{where}.source_roots")
+    else:
+        ut = manifest.get("ut_coverage") if isinstance(manifest.get("ut_coverage"), dict) else {}
+        roots = ut.get("source_roots") if isinstance(ut.get("source_roots"), list) else []
+        source_roots = tuple(str(r).strip() for r in roots if isinstance(r, str) and r.strip())
+    window = _mapping(data.get("pr_window"), f"{where}.pr_window", {"count", "max_age_days"})
+    coverage = _number(data.get("coverage_target", 0.85), f"{where}.coverage_target")
+    if not 0 < coverage <= 1:
+        raise LifecycleConfigError(f"{where}.coverage_target must be in (0, 1]")
+    budget = _number(data.get("budget_usd", 30.0), f"{where}.budget_usd")
+    if budget <= 0:
+        raise LifecycleConfigError(f"{where}.budget_usd must be > 0")
+    judge_call = _number(data.get("judge_call_usd", 0.50), f"{where}.judge_call_usd")
+    if judge_call < 0:
+        raise LifecycleConfigError(f"{where}.judge_call_usd must be >= 0")
+    return InitConfig(
+        seeds=seeds,
+        doc_globs=(_strings(data["doc_globs"], f"{where}.doc_globs") if "doc_globs" in data
+                   else DEFAULT_DOC_GLOBS),
+        source_roots=source_roots,
+        exclude=_strings(data.get("exclude"), f"{where}.exclude"),
+        module_depth=_int(data.get("module_depth", 2), f"{where}.module_depth", minimum=1),
+        min_module_loc=_int(data.get("min_module_loc", 300), f"{where}.min_module_loc", minimum=0),
+        pr_window_count=_int(window.get("count", 200), f"{where}.pr_window.count", minimum=1),
+        pr_window_max_age_days=_int(window.get("max_age_days", 180),
+                                    f"{where}.pr_window.max_age_days", minimum=1),
+        coverage_target=coverage,
+        budget_usd=budget,
+        judge_call_usd=judge_call,
+    )
+
+
+def validate_seeds(init: InitConfig, knowledge_root: Path) -> list[str]:
+    """Run-time check: every seed names an existing file or directory under
+    the knowledge root. Returns one problem per missing seed."""
+    root = Path(knowledge_root).resolve()
+    problems = []
+    for seed in init.seeds:
+        target = (root / seed).resolve()
+        if not target.is_relative_to(root):
+            problems.append(f"seed {seed} escapes the knowledge root")
+        elif not target.exists():
+            problems.append(f"seed {seed} does not exist in the knowledge tree")
+    return problems
+
+
 def parse_lifecycle(adapter: RepoAdapter) -> RepoLifecycle | None:
     """The adapter's lifecycle, or None when it has no knowledge_lifecycle."""
     section = adapter.manifest.get("knowledge_lifecycle")
@@ -171,6 +286,7 @@ def parse_lifecycle(adapter: RepoAdapter) -> RepoLifecycle | None:
         calibration_set=str(data.get("calibration_set") or ""),
         model_dir=str(data.get("model_dir") or ""),
         adapter_dir=Path(adapter.root),
+        init=parse_init(data.get("init"), f"{where}.init", repo=repo, manifest=adapter.manifest),
     )
 
 
 
@@ -0,0 +1,142 @@
+"""kb init: the adapter's knowledge_lifecycle.init block (design kb-init §3)."""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+import yaml
+
+from infermatrix_copilot.adapters.base import RepoAdapter
+from infermatrix_copilot.kb_service.config import (
+    DEFAULT_DOC_GLOBS, InitConfig, LifecycleConfigError, parse_lifecycle, validate_seeds,
+)
+
+
+def _adapter(tmp_path: Path, init: object = None, *, extra: dict | None = None,
+             with_init: bool = True) -> RepoAdapter:
+    root = tmp_path / "demo_adapter"
+    root.mkdir(exist_ok=True)
+    section: dict = {"enabled": False, "mode": "shadow"}
+    if with_init:
+        section["init"] = init
+    manifest = {
+        "name": "demo_adapter",
+        "repo": {"full_name": "org/demo", "path": "/x"},
+        "knowledge": {"repo_subdir": "repos/demo"},
+        "knowledge_lifecycle": section,
+        **(extra or {}),
+    }
+    (root / "manifest.yaml").write_text(yaml.safe_dump(manifest), encoding="utf-8")
+    return RepoAdapter(name="demo_adapter", root=root, manifest=manifest)
+
+
+def test_absent_init_is_none(tmp_path):
+    assert parse_lifecycle(_adapter(tmp_path, with_init=False)).init is None
+
+
+def test_empty_init_gets_defaults(tmp_path):
+    init = parse_lifecycle(_adapter(tmp_path, {})).init
+    assert init == InitConfig()
+    assert init.doc_globs == DEFAULT_DOC_GLOBS
+    assert (init.module_depth, init.min_module_loc) == (2, 300)
+    assert (init.pr_window_count, init.pr_window_max_age_days) == (200, 180)
+    assert (init.coverage_target, init.budget_usd, init.judge_call_usd) == (0.85, 30.0, 0.50)
+    assert init.seeds == init.source_roots == init.exclude == ()
+
+
+def test_full_init_parses(tmp_path):
+    init = parse_lifecycle(_adapter(tmp_path, {
+        "seeds": ["general/review/x.md", "repos/other/ci"],
+        "doc_globs": ["README.md"],
+        "source_roots": ["pkg/"],
+        "exclude": ["*/tests/*"],
+        "module_depth": 3,
+        "min_module_loc": 0,
+        "pr_window": {"count": 50, "max_age_days": 30},
+        "coverage_target": 1,
+        "budget_usd": 5,
+        "judge_call_usd": 0,
+    })).init
+    assert init.seeds == ("general/review/x.md", "repos/other/ci")
+    assert init.doc_globs == ("README.md",)
+    assert init.source_roots == ("pkg/",)
+    assert init.exclude == ("*/tests/*",)
+    assert (init.module_depth, init.min_module_loc) == (3, 0)
+    assert (init.pr_window_count, init.pr_window_max_age_days) == (50, 30)
+    assert (init.coverage_target, init.budget_usd, init.judge_call_usd) == (1.0, 5.0, 0.0)
+
+
+def test_source_roots_default_to_ut_coverage(tmp_path):
+    adapter = _adapter(tmp_path, {}, extra={"ut_coverage": {"source_roots": ["pkg/", "csrc/"]}})
+    assert parse_lifecycle(adapter).init.source_roots == ("pkg/", "csrc/")
+    adapter = _adapter(tmp_path, {"source_roots": ["only/"]},
+                       extra={"ut_coverage": {"source_roots": ["pkg/"]}})
+    assert parse_lifecycle(adapter).init.source_roots == ("only/",)
+
+
+@pytest.mark.parametrize("init, message", [
+    ("nope", "must be a mapping"),
+    ({"surprise": 1}, "unknown keys"),
+    ({"pr_window": {"count": 1, "days": 2}}, "unknown keys"),
+    ({"seeds": "general/x.md"}, "list of non-empty strings"),
+    ({"seeds": [""]}, "list of non-empty strings"),
+    ({"seeds": ["general/x.md", "general/x.md"]}, "duplicates"),
+    ({"seeds": ["repos/demo/rules.md"]}, "names the repository being initialised"),
+    ({"seeds": ["/abs/general/x.md"]}, "relative knowledge path"),
+    ({"seeds": ["general/../repos/demo/x.md"]}, "relative knowledge path"),
+    ({"seeds": ["general//x.md"]}, "relative knowledge path"),
+    ({"seeds": ["skills/x.md"]}, "general/ or repos/"),
+    ({"seeds": ["repos"]}, "general/ or repos/"),
+    ({"seeds": ["repos/Bad Name/x.md"]}, "general/ or repos/"),
+    ({"doc_globs": [1]}, "list of non-empty strings"),
+    ({"exclude": "x"}, "list of non-empty strings"),
+    ({"module_depth": 0}, "module_depth must be an integer >= 1"),
+    ({"module_depth": True}, "module_depth must be an integer"),
+    ({"min_module_loc": -1}, "min_module_loc must be an integer >= 0"),
+    ({"min_module_loc": 1.5}, "min_module_loc must be an integer"),
+    ({"pr_window": {"count": 0}}, "pr_window.count"),
+    ({"pr_window": {"max_age_days": 0}}, "pr_window.max_age_days"),
+    ({"coverage_target": 0}, "coverage_target must be in"),
+    ({"coverage_target": 1.01}, "coverage_target must be in"),
+    ({"coverage_target": "high"}, "coverage_target must be a finite number"),
+    ({"budget_usd": 0}, "budget_usd must be > 0"),
+    ({"budget_usd": True}, "budget_usd must be a finite number"),
+    ({"judge_call_usd": -0.1}, "judge_call_usd must be >= 0"),
+    ({"budget_usd": float("nan")}, "budget_usd must be a finite number"),
+    ({"budget_usd": float("inf")}, "budget_usd must be a finite number"),
+    ({"judge_call_usd": float("nan")}, "judge_call_usd must be a finite number"),
+    ({"judge_call_usd": float("inf")}, "judge_call_usd must be a finite number"),
+    ({"coverage_target": float("nan")}, "coverage_target must be a finite number"),
+])
+def test_invalid_init_is_rejected(tmp_path, init, message):
+    with pytest.raises(LifecycleConfigError, match=message):
+        parse_lifecycle(_adapter(tmp_path, init))
+
+
+def test_non_finite_yaml_values_are_rejected(tmp_path):
+    adapter = _adapter(tmp_path, {})
+    adapter.manifest["knowledge_lifecycle"]["init"] = yaml.safe_load("budget_usd: .inf")
+    with pytest.raises(LifecycleConfigError, match="finite"):
+        parse_lifecycle(adapter)
+
+
+def test_validate_seeds_reports_missing_paths(tmp_path):
+    root = tmp_path / "knowledge"
+    (root / "general" / "review").mkdir(parents=True)
+    (root / "general" / "review" / "x.md").write_text("x", encoding="utf-8")
+    (root / "repos" / "other" / "ci").mkdir(parents=True)
+    ok = InitConfig(seeds=("general/review/x.md", "repos/other/ci"))
+    assert validate_seeds(ok, root) == []
+    missing = InitConfig(seeds=("general/review/x.md", "repos/other/gone.md"))
+    assert validate_seeds(missing, root) == ["seed repos/other/gone.md does not exist in the knowledge tree"]
+
+
+def test_validate_seeds_refuses_escape(tmp_path):
+    root = tmp_path / "knowledge"
+    root.mkdir()
+    (tmp_path / "outside.md").write_text("x", encoding="utf-8")
+    (root / "general").mkdir()
+    (root / "general" / "link.md").symlink_to(tmp_path / "outside.md")
+    assert validate_seeds(InitConfig(seeds=("general/link.md",)), root) == [
+        "seed general/link.md escapes the knowledge root"]