fix(cline): mirror transactional Python adapter
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ZacharyZhang-NY committed
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commit
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@@ -1,53 +1,57 @@
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"""Fail-fast Cline hook I/O and runtime validation."""
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"""Physical Cline hook and managed runtime validation."""
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from __future__ import annotations
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from dataclasses import dataclass
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import base64
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import os
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import tempfile
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from typing import List, Sequence, Tuple
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from typing import Any, Optional
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import urllib.parse
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from ._file_io import (
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read_json,
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regular_file_exists,
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remove_file,
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require_runtime,
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write_text_atomic,
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from ._managed_files import (
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MAX_CONFIG_BYTES,
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MAX_SECRET_BYTES,
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physical_directory_exists,
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physical_file_exists,
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read_physical_file,
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)
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from ._strict_json import JsonObject, parse_json_object
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from .cline_contract import (
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AGENT_KEY,
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AUDIT_SCRIPT,
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GUARD_SCRIPT,
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HookFile,
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RuntimeContract,
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elydora_dir,
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parse_metadata,
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same_agent_id,
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)
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from .guard_template import generate_guard_script
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from .hook_template import generate_hook_script
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@dataclass(frozen=True)
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class PendingWrite:
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state: HookFile
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source: str
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def _same_path(left: str, right: str) -> bool:
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return os.path.normcase(os.path.abspath(left)) == os.path.normcase(
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os.path.abspath(right)
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)
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@dataclass(frozen=True)
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class StagedFile:
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state: HookFile
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temporary_path: str
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def validate_hook_tree(hooks_directory: str) -> None:
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physical_directory_exists(
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os.path.dirname(hooks_directory), "Cline configuration directory"
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)
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physical_directory_exists(hooks_directory, "Cline hooks directory")
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def read_hook_file(file_path: str) -> HookFile:
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try:
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with open(file_path, "r", encoding="utf-8") as file:
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source = file.read()
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except FileNotFoundError:
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validate_hook_tree(os.path.dirname(file_path))
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snapshot = read_physical_file(file_path, "Cline hook")
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if snapshot is None:
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return HookFile(False, file_path)
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except OSError as error:
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raise OSError(f"Read Cline hook at {file_path}: {error}") from error
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return HookFile(
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exists=True,
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file_path=file_path,
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source=source,
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metadata=parse_metadata(file_path, source),
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source=snapshot.contents,
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metadata=parse_metadata(file_path, snapshot.contents),
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)
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@@ -59,136 +63,194 @@ def require_available_hook_file(file: HookFile) -> None:
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)
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def _remove_temporary(path: str) -> None:
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def validate_api_origin(value: str, label: str = "base_url") -> None:
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try:
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os.remove(path)
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except FileNotFoundError:
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return
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def _stage_file(write: PendingWrite) -> StagedFile:
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directory = os.path.dirname(write.state.file_path)
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try:
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os.makedirs(directory, mode=0o700, exist_ok=True)
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except OSError as error:
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raise OSError(f"Create Cline hooks directory at {directory}: {error}") from error
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descriptor = -1
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temporary_path = ""
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try:
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descriptor, temporary_path = tempfile.mkstemp(
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prefix=f".{os.path.basename(write.state.file_path)}.",
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suffix=".tmp",
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dir=directory,
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text=True,
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parsed = urllib.parse.urlsplit(value)
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hostname = parsed.hostname
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parsed.port
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except ValueError as error:
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raise ValueError(f"{label} must be an absolute HTTP or HTTPS URL") from error
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invalid_character = "\\" in value or any(
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character.isspace() or ord(character) < 32 for character in value
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)
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if (
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parsed.scheme not in ("http", "https")
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or not parsed.netloc
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or hostname is None
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or invalid_character
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):
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raise ValueError(f"{label} must be an absolute HTTP or HTTPS URL")
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if (
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parsed.username is not None
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or parsed.password is not None
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or parsed.query
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or parsed.fragment
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):
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raise ValueError(
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f"{label} must exclude credentials, query parameters, and fragments"
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)
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with os.fdopen(descriptor, "w", encoding="utf-8", newline="") as file:
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descriptor = -1
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file.write(write.source)
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file.flush()
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os.fsync(file.fileno())
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os.chmod(temporary_path, 0o700)
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return StagedFile(write.state, temporary_path)
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except Exception as error:
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if descriptor >= 0:
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try:
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os.close(descriptor)
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except OSError as close_error:
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_remove_temporary(temporary_path)
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raise OSError(
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f"Stage Cline hook at {write.state.file_path}: {error}; "
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f"close failed: {close_error}"
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) from error
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_remove_temporary(temporary_path)
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raise OSError(
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f"Stage Cline hook at {write.state.file_path}: {error}"
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def validate_private_key(value: str, label: str = "private_key") -> None:
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try:
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padded = value + "=" * ((4 - len(value) % 4) % 4)
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seed = base64.b64decode(
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padded.replace("-", "+").replace("_", "/"), validate=True
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)
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canonical = base64.urlsafe_b64encode(seed).rstrip(b"=").decode("ascii")
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except (ValueError, UnicodeEncodeError) as error:
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raise ValueError(
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f"{label} must be a canonical 32-byte base64url value"
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) from error
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if len(seed) != 32 or canonical != value:
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raise ValueError(f"{label} must be a canonical 32-byte base64url value")
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def _rollback_file(state: HookFile) -> None:
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if state.exists:
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if state.source is None:
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raise RuntimeError("Existing Cline hook rollback state is missing source")
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write_text_atomic(
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state.file_path,
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state.source,
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0o700,
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"Cline hook rollback",
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def _require_non_empty_string(value: Any, field: str, config_path: str) -> str:
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if not isinstance(value, str) or not value.strip():
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raise ValueError(f"Elydora runtime config {field} is invalid: {config_path}")
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return value
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def _validate_runtime_config(
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config: JsonObject, expected_agent_id: str, config_path: str
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) -> None:
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supported = {"org_id", "agent_id", "kid", "base_url", "token", "agent_name"}
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extra = next((key for key in config if key not in supported), None)
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if extra is not None:
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raise ValueError(
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f'Elydora runtime config has unsupported field "{extra}": {config_path}'
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)
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else:
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remove_file(state.file_path, "Cline hook rollback")
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_require_non_empty_string(config.get("org_id"), "org_id", config_path)
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_require_non_empty_string(config.get("kid"), "kid", config_path)
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agent_id = _require_non_empty_string(
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config.get("agent_id"), "agent_id", config_path
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)
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if (
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not same_agent_id(agent_id, expected_agent_id)
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or config.get("agent_name") != AGENT_KEY
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):
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raise ValueError(
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f"Elydora runtime identity does not match Cline hooks: {config_path}"
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)
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if "token" in config:
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_require_non_empty_string(config.get("token"), "token", config_path)
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base_url = _require_non_empty_string(
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config.get("base_url"), "base_url", config_path
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)
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validate_api_origin(base_url, "Elydora runtime config base_url")
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def write_hook_pair(guard: PendingWrite, audit: PendingWrite) -> None:
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staged: List[StagedFile] = []
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try:
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staged.append(_stage_file(guard))
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staged.append(_stage_file(audit))
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except Exception as error:
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cleanup_errors: List[str] = []
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for item in staged:
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try:
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_remove_temporary(item.temporary_path)
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except OSError as cleanup_error:
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cleanup_errors.append(str(cleanup_error))
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suffix = f"; cleanup failed: {'; '.join(cleanup_errors)}" if cleanup_errors else ""
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raise OSError(f"Stage Cline hook pair: {error}{suffix}") from error
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committed: List[StagedFile] = []
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try:
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for item in staged:
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os.replace(item.temporary_path, item.state.file_path)
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committed.append(item)
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except Exception as error:
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recovery_errors: List[str] = []
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for item in reversed(committed):
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try:
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_rollback_file(item.state)
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except (OSError, RuntimeError) as rollback_error:
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recovery_errors.append(str(rollback_error))
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for item in staged[len(committed):]:
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try:
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_remove_temporary(item.temporary_path)
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except OSError as cleanup_error:
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recovery_errors.append(str(cleanup_error))
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suffix = f"; recovery failed: {'; '.join(recovery_errors)}" if recovery_errors else ""
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raise OSError(f"Write Cline hook pair: {error}{suffix}") from error
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def _read_runtime_config(file_path: str) -> Optional[JsonObject]:
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snapshot = read_physical_file(
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file_path, "Elydora runtime config", MAX_CONFIG_BYTES
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)
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if snapshot is None:
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return None
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return parse_json_object(
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snapshot.contents, f"Elydora runtime config at {file_path}"
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)
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def remove_owned_hooks(files: Sequence[HookFile], agent_id: str = "") -> None:
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for file in files:
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owned_agent_id = file.metadata.agent_id if file.metadata else ""
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if not owned_agent_id or (
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agent_id and not same_agent_id(owned_agent_id, agent_id)
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):
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continue
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remove_file(file.file_path, "Cline hook")
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def validate_runtime_tree(agent_directory: str, agent_id: str) -> None:
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root = elydora_dir()
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if not physical_directory_exists(root, "Elydora runtime directory"):
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return
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if not physical_directory_exists(
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agent_directory, "Elydora agent runtime directory"
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):
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return
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config_path = os.path.join(agent_directory, "config.json")
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config = _read_runtime_config(config_path)
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artifacts = (
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("private.key", "Elydora private key"),
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(GUARD_SCRIPT, "Elydora guard runtime"),
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(AUDIT_SCRIPT, "Elydora audit runtime"),
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("chain-state.json", "Elydora chain state"),
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("status-cache.json", "Elydora status cache"),
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("error.log", "Elydora error log"),
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)
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artifact_exists = any(
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physical_file_exists(os.path.join(agent_directory, name), label)
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for name, label in artifacts
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)
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if config is None:
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if artifact_exists:
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raise ValueError(
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"Elydora runtime identity cannot be verified without config.json: "
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f"{agent_directory}"
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)
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return
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configured_id = config.get("agent_id")
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if (
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not isinstance(configured_id, str)
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or not same_agent_id(configured_id, agent_id)
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or config.get("agent_name") != AGENT_KEY
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):
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raise ValueError(
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"Elydora runtime config identity does not match Cline agent "
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f"{agent_id}: {config_path}"
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)
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def _valid_contract_paths(contract: RuntimeContract) -> bool:
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return (
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_same_path(os.path.dirname(contract.agent_directory), elydora_dir())
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and _same_path(
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contract.guard_path,
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os.path.join(contract.agent_directory, GUARD_SCRIPT),
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)
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and _same_path(
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contract.audit_path,
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os.path.join(contract.agent_directory, AUDIT_SCRIPT),
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)
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)
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def runtime_files_exist(contract: RuntimeContract) -> bool:
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config_path = os.path.join(contract.agent_directory, "config.json")
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config = read_json(config_path, "Elydora runtime config")
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if config is None:
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if not _valid_contract_paths(contract):
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return False
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config_agent_id = config.get("agent_id")
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if (
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config.get("agent_name") != AGENT_KEY
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or not isinstance(config_agent_id, str)
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or not same_agent_id(config_agent_id, contract.agent_id)
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root = elydora_dir()
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if not physical_directory_exists(root, "Elydora runtime directory"):
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return False
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if not physical_directory_exists(
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contract.agent_directory, "Elydora agent runtime directory"
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):
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return False
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files: Tuple[Tuple[str, str], ...] = (
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(contract.guard_path, "Elydora guard runtime"),
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(contract.audit_path, "Elydora audit runtime"),
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config_path = os.path.join(contract.agent_directory, "config.json")
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key_path = os.path.join(contract.agent_directory, "private.key")
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config = _read_runtime_config(config_path)
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key = read_physical_file(key_path, "Elydora private key", MAX_SECRET_BYTES)
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guard = read_physical_file(contract.guard_path, "Elydora guard runtime")
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audit = read_physical_file(contract.audit_path, "Elydora audit runtime")
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if any(item is None for item in (config, key, guard, audit)):
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return False
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assert config is not None
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assert key is not None
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assert guard is not None
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assert audit is not None
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_validate_runtime_config(config, contract.agent_id, config_path)
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validate_private_key(key.contents, "Elydora private key")
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expected_audit = generate_hook_script(
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org_id="",
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agent_id=contract.agent_id,
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kid="",
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base_url="",
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native_payload=True,
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agent_name=AGENT_KEY,
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)
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return (
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guard.contents == generate_guard_script(AGENT_KEY, contract.agent_id)
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and audit.contents == expected_audit
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)
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return all(regular_file_exists(path, label) for path, label in files)
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__all__ = [
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"PendingWrite",
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"read_hook_file",
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"remove_owned_hooks",
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"require_available_hook_file",
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"require_runtime",
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"runtime_files_exist",
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"write_hook_pair",
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"validate_api_origin",
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"validate_hook_tree",
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"validate_private_key",
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"validate_runtime_tree",
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]
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