fix(letta): mirror official Python hook integration

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ZacharyZhang-NY committed 2026-07-20 18:48:01 -04:00
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@@ -1,208 +1,78 @@
"""Letta Code plugin — merges PreToolUse/PostToolUse hooks into ~/.letta/settings.json."""
"""Letta Code 0.28 native global hook integration."""
from __future__ import annotations
import json
import os
import sys
from typing import Dict
from ._file_io import write_json_atomic, write_text_atomic
from .base import AgentPlugin, InstallConfig, PluginStatus
from .hook_template import generate_hook_script
from .letta_config import render_letta_document
from .letta_contract import (
AGENT_KEY,
JsonObject,
build_letta_group,
letta_runtime_contracts,
)
from .letta_installation import (
LettaRuntimePaths,
commit_letta_installation,
commit_letta_uninstall,
preflight_letta_installation,
prepare_letta_installation,
prepare_letta_uninstall,
)
from .letta_io import letta_runtime_files_exist
from .letta_sources import read_letta_sources
SETTINGS_PATH = os.path.join(os.path.expanduser("~"), ".letta", "settings.json")
ELYDORA_DIR = os.path.join(os.path.expanduser("~"), ".elydora")
def _installed_groups(paths: LettaRuntimePaths) -> Dict[str, JsonObject]:
return {
"PreToolUse": build_letta_group(paths.guard_path),
"PostToolUse": build_letta_group(paths.audit_path),
"PostToolUseFailure": build_letta_group(paths.audit_path),
}
class LettaPlugin(AgentPlugin):
"""Install/uninstall Elydora audit hook for Letta Code."""
"""Install Elydora into Letta Code's native global settings."""
@staticmethod
def _hook_path_for(agent_id: str) -> str:
return os.path.join(ELYDORA_DIR, agent_id, "hook.py")
manages_guard_runtime = True
def preflight_install(self, config: InstallConfig) -> None:
sources = read_letta_sources()
preflight_letta_installation(config, sources)
def install(self, config: InstallConfig) -> None:
agent_id = config.get("agent_id", "")
agent_name = config.get("agent_name", "")
# Create per-agent directory
agent_dir = os.path.join(ELYDORA_DIR, agent_id)
os.makedirs(agent_dir, exist_ok=True)
# Write config.json
config_data = {
"org_id": config.get("org_id", ""),
"agent_id": agent_id,
"kid": config.get("kid", ""),
"base_url": config.get("base_url", "https://api.elydora.com"),
"token": config.get("token", ""),
"agent_name": agent_name,
}
config_path = os.path.join(agent_dir, "config.json")
write_json_atomic(
config_path,
config_data,
0o600,
"Elydora runtime config",
sources = read_letta_sources()
paths = preflight_letta_installation(config, sources)
rendered = render_letta_document(
sources.global_settings,
None,
_installed_groups(paths),
)
# Write private key
private_key_path = os.path.join(agent_dir, "private.key")
write_text_atomic(
private_key_path,
config.get("private_key", ""),
0o600,
"Elydora private key",
)
script = generate_hook_script(
org_id=config.get("org_id", ""),
agent_id=agent_id,
kid=config.get("kid", ""),
base_url=config.get("base_url", "https://api.elydora.com"),
)
hook_path = self._hook_path_for(agent_id)
write_text_atomic(
hook_path,
script,
0o700,
"Elydora audit runtime",
)
guard_script_path = config.get("guard_script_path", "")
python_exe = sys.executable
settings = _load_json(SETTINGS_PATH)
hooks = settings.setdefault("hooks", {})
# --- PreToolUse (guard — freeze enforcement, PascalCase with matcher, no timeout_ms) ---
pre_tool_use = hooks.setdefault("PreToolUse", [])
pre_tool_use[:] = [h for h in pre_tool_use if not _is_elydora_hook(h)]
if guard_script_path:
pre_tool_use.append({
"matcher": "*",
"hooks": [
{
"type": "command",
"command": f'"{python_exe}" {guard_script_path}',
}
],
})
# --- PostToolUse (audit logging, PascalCase with matcher, no timeout_ms) ---
post_tool_use = hooks.setdefault("PostToolUse", [])
post_tool_use[:] = [h for h in post_tool_use if not _is_elydora_hook(h)]
post_tool_use.append({
"matcher": "*",
"hooks": [
{
"type": "command",
"command": hook_path,
}
],
})
_save_json(SETTINGS_PATH, settings)
print("Elydora hook installed for Letta Code.")
print(f" Hook script: {hook_path}")
print(f" Settings: {SETTINGS_PATH}")
changes = prepare_letta_installation(config, paths, rendered)
commit_letta_installation(changes, sources)
print(f"Letta Code hooks installed at {sources.global_settings.file_path}")
print("Letta Code verification: run /hooks and restart active sessions.")
def uninstall(self, agent_id: str = "") -> None:
if os.path.exists(SETTINGS_PATH):
settings = _load_json(SETTINGS_PATH)
hooks = settings.get("hooks", {})
changed = False
# Remove PreToolUse entries
pre_tool_use = hooks.get("PreToolUse", [])
pre_filtered = [h for h in pre_tool_use if not _is_elydora_hook(h, agent_id)]
if len(pre_filtered) != len(pre_tool_use):
hooks["PreToolUse"] = pre_filtered
if not pre_filtered:
del hooks["PreToolUse"]
changed = True
# Remove PostToolUse entries
post_tool_use = hooks.get("PostToolUse", [])
post_filtered = [h for h in post_tool_use if not _is_elydora_hook(h, agent_id)]
if len(post_filtered) != len(post_tool_use):
hooks["PostToolUse"] = post_filtered
if not post_filtered:
del hooks["PostToolUse"]
changed = True
if changed:
if not hooks:
del settings["hooks"]
_save_json(SETTINGS_PATH, settings)
# Hook script removal is handled by cli.py cmd_uninstall (rmtree of agent dir)
print("Elydora hook uninstalled from Letta Code.")
sources = read_letta_sources()
rendered = render_letta_document(
sources.global_settings, agent_id or None, {}
)
commit_letta_uninstall(prepare_letta_uninstall(rendered), sources)
def status(self) -> PluginStatus:
# Scan ~/.elydora/*/hook.py for any installed hook
import glob as _glob
hook_pattern = os.path.join(ELYDORA_DIR, "*", "hook.py")
hook_files = _glob.glob(hook_pattern)
hook_exists = len(hook_files) > 0
settings_configured = False
if os.path.exists(SETTINGS_PATH):
settings = _load_json(SETTINGS_PATH)
hooks = settings.get("hooks", {})
pre_tool_use = hooks.get("PreToolUse", [])
post_tool_use = hooks.get("PostToolUse", [])
pre_configured = any(_is_elydora_hook(h) for h in pre_tool_use)
post_configured = any(_is_elydora_hook(h) for h in post_tool_use)
settings_configured = pre_configured and post_configured
installed = hook_exists and settings_configured
sources = read_letta_sources()
contracts = letta_runtime_contracts(sources.global_settings.hooks)
configured = not sources.disable_control.disabled and bool(contracts)
installed = configured and letta_runtime_files_exist(contracts)
file_path = sources.global_settings.file_path
if installed:
details = f"Found {len(hook_files)} agent(s): {', '.join(hook_files)}"
elif hook_exists:
details = "Hook script exists but not configured in settings"
elif settings_configured:
details = "Configured in settings but hook script missing"
details = f"Config: {file_path}"
elif contracts and sources.disable_control.disabled:
details = f"Configured hooks are disabled: {file_path}"
elif contracts:
details = f"Configured at {file_path}; managed contract incomplete"
else:
details = "Not installed"
return PluginStatus(installed=installed, agent="letta", details=details)
def _is_elydora_hook(entry: dict, agent_id: str = "") -> bool:
# Collect all command strings from the entry
commands: list[str] = []
inner_hooks = entry.get("hooks")
if isinstance(inner_hooks, list):
for hook in inner_hooks:
if isinstance(hook, dict) and isinstance(hook.get("command"), str):
commands.append(hook["command"])
else:
command = entry.get("command")
if isinstance(command, str):
commands.append(command)
for cmd in commands:
cmd_lower = cmd.lower()
if "elydora" not in cmd_lower:
continue
# If agent_id is specified, only match hooks for that specific agent
if agent_id and agent_id in cmd:
return True
if not agent_id:
return True
return False
def _load_json(path: str) -> dict:
if not os.path.exists(path):
return {}
with open(path, "r", encoding="utf-8") as f:
return json.load(f)
def _save_json(path: str, data: dict) -> None:
write_json_atomic(path, data, 0o600, "Letta settings")
return PluginStatus(installed=installed, agent=AGENT_KEY, details=details)
@@ -0,0 +1,175 @@
"""Letta Code command construction and exact runtime ownership."""
from __future__ import annotations
from dataclasses import dataclass
import os
import re
import sys
from typing import Optional, Tuple
from elydora._runtime_paths import runtime_root
@dataclass(frozen=True)
class LettaRuntimeReference:
agent_id: str
script_path: str
executable_path: Optional[str] = None
def same_letta_path(left: str, right: str) -> bool:
return os.path.normcase(os.path.abspath(left)) == os.path.normcase(
os.path.abspath(right)
)
def same_letta_agent_id(left: str, right: str) -> bool:
return os.path.normcase(left) == os.path.normcase(right)
def _quote_posix(value: str) -> str:
return "'" + value.replace("'", "'\"'\"'") + "'"
def _quote_powershell(value: str) -> str:
return "'" + value.replace("'", "''") + "'"
def build_letta_command(script_path: str) -> str:
if not os.path.isabs(sys.executable) or not os.path.isabs(script_path):
raise ValueError(
"Letta Code hook commands require absolute executable and script paths"
)
invocation = (
f"{_quote_powershell(sys.executable)} {_quote_powershell(script_path)}"
if os.name == "nt"
else f"{_quote_posix(sys.executable)} {_quote_posix(script_path)}"
)
return f"& {invocation}; exit $LASTEXITCODE" if os.name == "nt" else invocation
def _read_posix_argument(command: str, start: int) -> Optional[Tuple[str, int]]:
if start >= len(command) or command[start] != "'":
return None
apostrophe = "'\"'\"'"
value = ""
index = start + 1
while index < len(command):
if command.startswith(apostrophe, index):
value += "'"
index += len(apostrophe)
continue
if command[index] == "'":
return value, index + 1
value += command[index]
index += 1
return None
def _parse_posix_command(command: str) -> Optional[Tuple[str, str]]:
executable = _read_posix_argument(command, 0)
if executable is None or executable[1] >= len(command):
return None
if command[executable[1]] != " ":
return None
script = _read_posix_argument(command, executable[1] + 1)
if script is None or script[1] != len(command):
return None
return executable[0], script[0]
def _read_powershell_argument(
command: str, start: int
) -> Optional[Tuple[str, int]]:
if start >= len(command) or command[start] != "'":
return None
value = ""
index = start + 1
while index < len(command):
if command[index] != "'":
value += command[index]
index += 1
continue
if index + 1 < len(command) and command[index + 1] == "'":
value += "'"
index += 2
continue
return value, index + 1
return None
def _parse_powershell_command(command: str) -> Optional[Tuple[str, str]]:
if not command.startswith("& "):
return None
executable = _read_powershell_argument(command, 2)
if executable is None or executable[1] >= len(command):
return None
if command[executable[1]] != " ":
return None
script = _read_powershell_argument(command, executable[1] + 1)
if script is None or command[script[1] :] != "; exit $LASTEXITCODE":
return None
return executable[0], script[0]
def _is_python_executable(file_path: str) -> bool:
return bool(re.fullmatch(r"python(?:3(?:\.\d+)?)?(?:\.exe)?", os.path.basename(file_path), re.IGNORECASE))
def _runtime_reference(
script_path: str,
script_name: str,
executable_path: Optional[str] = None,
) -> Optional[LettaRuntimeReference]:
if not os.path.isabs(script_path) or os.path.basename(script_path) != script_name:
return None
agent_directory = os.path.dirname(script_path)
if not same_letta_path(os.path.dirname(agent_directory), runtime_root()):
return None
agent_id = os.path.basename(agent_directory)
if agent_id in {"", ".", ".."}:
return None
return LettaRuntimeReference(agent_id, script_path, executable_path)
def letta_runtime_reference(
command: str, script_name: str
) -> Optional[LettaRuntimeReference]:
parsed = (
_parse_powershell_command(command)
if os.name == "nt"
else _parse_posix_command(command)
)
if (
parsed is None
or not os.path.isabs(parsed[0])
or not _is_python_executable(parsed[0])
):
return None
return _runtime_reference(parsed[1], script_name, parsed[0])
def letta_legacy_guard_reference(
command: str, script_name: str
) -> Optional[LettaRuntimeReference]:
if not command.startswith('"'):
return None
closing = command.find('"', 1)
if closing < 0 or closing + 1 >= len(command) or command[closing + 1] != " ":
return None
executable = command[1:closing]
script_path = command[closing + 2 :]
if (
not os.path.isabs(executable)
or not _is_python_executable(executable)
or not script_path
):
return None
return _runtime_reference(script_path, script_name, executable)
def letta_legacy_audit_reference(
command: str, script_name: str
) -> Optional[LettaRuntimeReference]:
return _runtime_reference(command, script_name)
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"""Strict Letta Code settings parsing and source-preserving edits."""
from __future__ import annotations
from dataclasses import dataclass
from typing import Dict, Optional
from ._jsonc import JsoncEditor
from ._managed_files import FileSnapshot
from ._strict_json import parse_json_object
from .letta_contract import (
MANAGED_EVENTS,
JsonObject,
LettaHooks,
managed_letta_removals,
read_letta_hooks,
)
@dataclass(frozen=True)
class LettaDocument:
kind: str
file_path: str
exists: bool
raw: str
snapshot: Optional[FileSnapshot]
root: JsonObject
hooks: LettaHooks
has_hooks_container: bool
@dataclass(frozen=True)
class RenderedLettaDocument:
document: LettaDocument
changed: bool
next_source: Optional[str]
def letta_source_label(kind: str) -> str:
labels = {
"global": "Letta Code global settings",
"project": "Letta Code project settings",
"project-local": "Letta Code project-local settings",
}
try:
return labels[kind]
except KeyError as error:
raise ValueError(f"Unsupported Letta Code document kind: {kind}") from error
def letta_document_label(document: LettaDocument) -> str:
return letta_source_label(document.kind)
def parse_letta_document(
*,
kind: str,
exists: bool,
file_path: str,
raw: str,
snapshot: Optional[FileSnapshot] = None,
) -> LettaDocument:
label = f"{letta_source_label(kind)} at {file_path}"
root = parse_json_object(raw, label)
return LettaDocument(
kind,
file_path,
exists,
raw,
snapshot,
root,
read_letta_hooks(root["hooks"]) if "hooks" in root else {},
"hooks" in root,
)
def create_letta_document(kind: str, file_path: str) -> LettaDocument:
return parse_letta_document(
kind=kind,
exists=False,
file_path=file_path,
raw="{}\n",
)
def _current_document(
document: LettaDocument, editor: JsoncEditor
) -> LettaDocument:
return parse_letta_document(
kind=document.kind,
exists=document.exists,
file_path=document.file_path,
raw=editor.raw,
snapshot=document.snapshot,
)
def _event_groups(hooks: LettaHooks, event: str) -> list[JsonObject]:
value = hooks.get(event)
return value if isinstance(value, list) else []
def _remove_managed(
editor: JsoncEditor,
document: LettaDocument,
agent_id: Optional[str],
) -> None:
removals = managed_letta_removals(document.hooks, agent_id)
for event in MANAGED_EVENTS:
event_removals = sorted(
(item for item in removals if item.event == event),
key=lambda item: item.group_index,
reverse=True,
)
for removal in event_removals:
group_path = ("hooks", event, removal.group_index)
if removal.remove_group:
editor.delete(group_path)
continue
for handler_index in sorted(removal.handler_indexes, reverse=True):
editor.delete((*group_path, "hooks", handler_index))
if event_removals:
current = _current_document(document, editor)
if event in current.hooks and not _event_groups(current.hooks, event):
editor.delete(("hooks", event))
current = _current_document(document, editor)
if current.has_hooks_container and not current.hooks:
editor.delete(("hooks",))
def _append_group(
editor: JsoncEditor,
document: LettaDocument,
event: str,
group: JsonObject,
) -> None:
current = _current_document(document, editor)
groups = _event_groups(current.hooks, event)
if not current.has_hooks_container:
editor.add_property((), "hooks", {event: [group]})
elif groups:
editor.append(("hooks", event), group)
elif event in current.hooks:
editor.append(("hooks", event), group)
else:
editor.add_property(("hooks",), event, [group])
def _already_installed(
document: LettaDocument, additions: Dict[str, JsonObject]
) -> bool:
if set(additions) != set(MANAGED_EVENTS):
return False
removals = managed_letta_removals(document.hooks)
for event in MANAGED_EVENTS:
expected = additions[event]
event_removals = [item for item in removals if item.event == event]
exact_groups = [
group for group in _event_groups(document.hooks, event)
if group == expected
]
if (
len(event_removals) != 1
or not event_removals[0].remove_group
or len(exact_groups) != 1
):
return False
return True
def render_letta_document(
document: LettaDocument,
agent_id: Optional[str],
additions: Dict[str, JsonObject],
) -> RenderedLettaDocument:
if agent_id is None and _already_installed(document, additions):
return RenderedLettaDocument(document, False, document.raw)
editor = JsoncEditor(
document.raw,
f"{letta_document_label(document)} at {document.file_path}",
allow_trailing_commas=False,
)
_remove_managed(editor, document, agent_id)
for event in MANAGED_EVENTS:
group = additions.get(event)
if group is not None:
_append_group(editor, document, event, group)
current = _current_document(document, editor)
if not additions and not current.root:
return RenderedLettaDocument(document, True, None)
return RenderedLettaDocument(
document,
editor.raw != document.raw,
editor.raw,
)
@@ -0,0 +1,277 @@
"""Letta Code 0.28 hook schema and exact ownership rules."""
from __future__ import annotations
from dataclasses import dataclass
import math
import os
import sys
from typing import Any, Dict, List, Optional, Tuple
from elydora._runtime_paths import runtime_root
from .letta_command import (
LettaRuntimeReference,
build_letta_command,
letta_legacy_audit_reference,
letta_legacy_guard_reference,
letta_runtime_reference,
same_letta_agent_id,
same_letta_path,
)
AGENT_KEY = "letta"
GUARD_SCRIPT = "guard.py"
AUDIT_SCRIPT = "hook.py"
HOOK_TIMEOUT_MILLISECONDS = 10_000
MANAGED_EVENTS = ("PreToolUse", "PostToolUse", "PostToolUseFailure")
TOOL_EVENTS = {
"PreToolUse",
"PostToolUse",
"PostToolUseFailure",
"PermissionRequest",
}
SIMPLE_EVENTS = {
"UserPromptSubmit",
"Notification",
"Stop",
"SubagentStop",
"PreCompact",
"SessionStart",
"SessionEnd",
}
KNOWN_EVENTS = TOOL_EVENTS | SIMPLE_EVENTS
JsonObject = Dict[str, Any]
LettaHooks = Dict[str, Any]
@dataclass(frozen=True)
class LettaRuntimeContract:
agent_id: str
guard_path: str
audit_path: str
@dataclass(frozen=True)
class ManagedRemoval:
event: str
group_index: int
handler_indexes: Tuple[int, ...]
remove_group: bool
def elydora_dir() -> str:
return runtime_root()
def _validate_timeout(value: JsonObject, label: str) -> None:
if "timeout" not in value:
return
timeout = value["timeout"]
try:
finite = math.isfinite(timeout)
except (TypeError, OverflowError):
finite = False
if (
isinstance(timeout, bool)
or not isinstance(timeout, (int, float))
or not finite
or timeout < 0
):
raise ValueError(f"{label} timeout must be a non-negative finite number")
def _validate_handler(value: Any, label: str) -> JsonObject:
if not isinstance(value, dict):
raise ValueError(f"{label} must be an object")
handler = dict(value)
kind = handler.get("type")
if kind not in {"command", "prompt"}:
raise ValueError(f'{label} has unsupported type "{kind}"')
_validate_timeout(handler, label)
if "quiet" in handler and not isinstance(handler["quiet"], bool):
raise ValueError(f"{label} quiet must be a boolean")
if kind == "command":
command = handler.get("command")
if not isinstance(command, str) or not command:
raise ValueError(f"{label} requires a non-empty command")
else:
prompt = handler.get("prompt")
if not isinstance(prompt, str) or not prompt:
raise ValueError(f"{label} requires a non-empty prompt")
if "model" in handler and not isinstance(handler["model"], str):
raise ValueError(f"{label} model must be a string")
return handler
def _validate_group(value: Any, event: str, index: int) -> JsonObject:
label = f"Letta Code settings group hooks.{event}[{index}]"
if not isinstance(value, dict):
raise ValueError(f"{label} must be an object")
group = dict(value)
if event in TOOL_EVENTS:
if not isinstance(group.get("matcher"), str):
raise ValueError(f"{label} matcher must be a string")
elif "matcher" in group:
raise ValueError(f"{label} matcher is unsupported for {event}")
handlers = group.get("hooks")
if not isinstance(handlers, list):
raise ValueError(f"{label} must contain a hooks array")
group["hooks"] = [
_validate_handler(handler, f"{label}.hooks[{handler_index}]")
for handler_index, handler in enumerate(handlers)
]
return group
def read_letta_hooks(value: Any) -> LettaHooks:
if not isinstance(value, dict):
raise ValueError('Letta Code settings field "hooks" must be an object')
if "disabled" in value and not isinstance(value["disabled"], bool):
raise ValueError(
'Letta Code settings field "hooks.disabled" must be a boolean'
)
hooks: LettaHooks = {}
for event, groups in value.items():
if event == "disabled" or event not in KNOWN_EVENTS:
hooks[event] = groups
continue
if not isinstance(groups, list):
raise ValueError(
f'Letta Code settings field "hooks.{event}" must be an array'
)
hooks[event] = [
_validate_group(group, event, index)
for index, group in enumerate(groups)
]
return hooks
def build_letta_group(script_path: str) -> JsonObject:
return {
"matcher": "*",
"hooks": [{
"type": "command",
"command": build_letta_command(script_path),
"timeout": HOOK_TIMEOUT_MILLISECONDS,
}],
}
def _exact_group(group: JsonObject) -> bool:
return set(group) == {"matcher", "hooks"} and group.get("matcher") == "*"
def _current_reference(
handler: JsonObject, script_name: str
) -> Optional[LettaRuntimeReference]:
if (
set(handler) == {"type", "command", "timeout"}
and handler.get("type") == "command"
and handler.get("timeout") == HOOK_TIMEOUT_MILLISECONDS
and isinstance(handler.get("command"), str)
):
return letta_runtime_reference(handler["command"], script_name)
return None
def _legacy_reference(
event: str, handler: JsonObject, script_name: str
) -> Optional[LettaRuntimeReference]:
if (
set(handler) != {"type", "command"}
or handler.get("type") != "command"
or not isinstance(handler.get("command"), str)
):
return None
if event == "PreToolUse":
return letta_legacy_guard_reference(handler["command"], script_name)
return letta_legacy_audit_reference(handler["command"], script_name)
def _event_groups(hooks: LettaHooks, event: str) -> List[JsonObject]:
value = hooks.get(event)
return value if isinstance(value, list) else []
_EVENT_CONTRACTS = (
("PreToolUse", GUARD_SCRIPT),
("PostToolUse", AUDIT_SCRIPT),
("PostToolUseFailure", AUDIT_SCRIPT),
)
def managed_letta_removals(
hooks: LettaHooks, agent_id: Optional[str] = None
) -> List[ManagedRemoval]:
removals: List[ManagedRemoval] = []
for event, script_name in _EVENT_CONTRACTS:
for group_index, group in enumerate(_event_groups(hooks, event)):
indexes = tuple(
index
for index, handler in enumerate(group["hooks"])
if (
reference := (
_current_reference(handler, script_name)
or _legacy_reference(event, handler, script_name)
)
)
is not None
and (
agent_id is None
or same_letta_agent_id(reference.agent_id, agent_id)
)
)
if indexes:
removals.append(ManagedRemoval(
event,
group_index,
indexes,
_exact_group(group) and len(indexes) == len(group["hooks"]),
))
return removals
def _references_for_event(
groups: List[JsonObject], script_name: str
) -> Dict[str, List[LettaRuntimeReference]]:
references: Dict[str, List[LettaRuntimeReference]] = {}
for group in groups:
if not _exact_group(group):
continue
for handler in group["hooks"]:
reference = _current_reference(handler, script_name)
if (
reference is None
or reference.executable_path is None
or not same_letta_path(reference.executable_path, sys.executable)
):
continue
key = os.path.normcase(reference.agent_id)
references.setdefault(key, []).append(reference)
return references
def letta_runtime_contracts(hooks: LettaHooks) -> List[LettaRuntimeContract]:
guards = _references_for_event(_event_groups(hooks, "PreToolUse"), GUARD_SCRIPT)
posts = _references_for_event(_event_groups(hooks, "PostToolUse"), AUDIT_SCRIPT)
failures = _references_for_event(
_event_groups(hooks, "PostToolUseFailure"), AUDIT_SCRIPT
)
contracts: List[LettaRuntimeContract] = []
for key, guard in guards.items():
post = posts.get(key, [])
failure = failures.get(key, [])
if len(guard) != 1 or len(post) != 1 or len(failure) != 1:
continue
if not same_letta_path(post[0].script_path, failure[0].script_path):
continue
contracts.append(LettaRuntimeContract(
guard[0].agent_id,
guard[0].script_path,
post[0].script_path,
))
return contracts
@@ -0,0 +1,205 @@
"""Transactional Letta Code hook and runtime installation."""
from __future__ import annotations
from dataclasses import dataclass
import json
import os
from typing import List, Optional, Sequence
from elydora._runtime_paths import resolve_agent_directory
from ._managed_files import MAX_CONFIG_BYTES, MAX_SECRET_BYTES, MAX_SOURCE_BYTES
from ._transaction import (
FileChange,
FilePrecondition,
file_change,
source_change,
write_changes,
)
from .base import InstallConfig
from .guard_template import generate_guard_script
from .hook_template import generate_hook_script
from .letta_command import same_letta_path
from .letta_config import RenderedLettaDocument, letta_document_label
from .letta_contract import AGENT_KEY, AUDIT_SCRIPT, GUARD_SCRIPT, elydora_dir
from .letta_io import validate_api_origin, validate_private_key, validate_runtime_tree
from .letta_sources import LettaSources, require_letta_hooks_enabled
@dataclass(frozen=True)
class LettaRuntimePaths:
agent_id: str
agent_directory: str
guard_path: str
audit_path: str
def _runtime_config(config: InstallConfig, agent_id: str) -> dict:
value = {
"org_id": config.get("org_id", ""),
"agent_id": agent_id,
"kid": config.get("kid", ""),
"base_url": config.get("base_url", "https://api.elydora.com"),
"agent_name": AGENT_KEY,
}
token = config.get("token")
if token:
value["token"] = token
return value
def _json_source(value: dict) -> str:
return json.dumps(value, indent=2) + "\n"
def _agent_paths(config: InstallConfig) -> LettaRuntimePaths:
agent_id = config.get("agent_id", "")
if not agent_id:
raise ValueError("agent_id is required")
agent_directory = resolve_agent_directory(elydora_dir(), agent_id)
guard_path = os.path.join(agent_directory, GUARD_SCRIPT)
audit_path = os.path.join(agent_directory, AUDIT_SCRIPT)
if not same_letta_path(config.get("guard_script_path", ""), guard_path):
raise ValueError(
"Elydora guard runtime must use the managed agent directory: "
f"{guard_path}"
)
return LettaRuntimePaths(agent_id, agent_directory, guard_path, audit_path)
def _validate_install_config(config: InstallConfig) -> None:
for field in ("org_id", "agent_id", "kid", "private_key", "base_url"):
value = config.get(field)
if not isinstance(value, str) or not value:
raise ValueError(f"{field} is required")
if config.get("agent_name") != AGENT_KEY:
raise ValueError(
f"Letta Code installation requires agent_name {AGENT_KEY}"
)
validate_private_key(config["private_key"])
validate_api_origin(config["base_url"])
if "token" in config:
token = config["token"]
if not isinstance(token, str) or not token:
raise ValueError("token must be a non-empty string when provided")
_agent_paths(config)
def preflight_letta_installation(
config: InstallConfig, sources: LettaSources
) -> LettaRuntimePaths:
require_letta_hooks_enabled(sources)
_validate_install_config(config)
paths = _agent_paths(config)
validate_runtime_tree(paths.agent_directory, paths.agent_id)
return paths
def _runtime_change(
file_path: str,
label: str,
next_source: str,
mode: int,
maximum_bytes: int = MAX_SOURCE_BYTES,
) -> Optional[FileChange]:
return file_change(file_path, label, next_source, mode, maximum_bytes)
def _rendered_change(
rendered: RenderedLettaDocument,
) -> Optional[FileChange]:
if not rendered.changed:
return None
return source_change(
rendered.document.file_path,
letta_document_label(rendered.document),
rendered.document.raw if rendered.document.exists else None,
rendered.next_source,
0o600,
MAX_SOURCE_BYTES,
expected_snapshot=rendered.document.snapshot,
)
def _present(changes: Sequence[Optional[FileChange]]) -> List[FileChange]:
return [change for change in changes if change is not None]
def prepare_letta_installation(
config: InstallConfig,
paths: LettaRuntimePaths,
rendered: RenderedLettaDocument,
) -> List[FileChange]:
guard_script = generate_guard_script(AGENT_KEY, paths.agent_id)
audit_script = generate_hook_script(
org_id=config.get("org_id", ""),
agent_id=paths.agent_id,
kid=config.get("kid", ""),
base_url=config.get("base_url", "https://api.elydora.com"),
fail_closed=True,
native_payload=True,
agent_name=AGENT_KEY,
)
return _present([
_runtime_change(
paths.guard_path, "Elydora guard runtime", guard_script, 0o700
),
_runtime_change(
os.path.join(paths.agent_directory, "config.json"),
"Elydora runtime config",
_json_source(_runtime_config(config, paths.agent_id)),
0o600,
MAX_CONFIG_BYTES,
),
_runtime_change(
os.path.join(paths.agent_directory, "private.key"),
"Elydora private key",
config.get("private_key", ""),
0o600,
MAX_SECRET_BYTES,
),
_runtime_change(
paths.audit_path, "Elydora audit runtime", audit_script, 0o700
),
_rendered_change(rendered),
])
def _read_only_preconditions(
sources: LettaSources, changed_path: Optional[str]
) -> List[FilePrecondition]:
return [
condition
for condition in sources.preconditions
if changed_path is None
or not same_letta_path(condition.file_path, changed_path)
]
def commit_letta_installation(
changes: List[FileChange], sources: LettaSources
) -> None:
write_changes(
changes,
"Install Letta Code hooks",
_read_only_preconditions(sources, sources.global_settings.file_path),
)
def prepare_letta_uninstall(
rendered: RenderedLettaDocument,
) -> Optional[FileChange]:
return _rendered_change(rendered)
def commit_letta_uninstall(
change: Optional[FileChange], sources: LettaSources
) -> None:
if change is None:
return
write_changes(
[change],
"Uninstall Letta Code hooks",
_read_only_preconditions(sources, sources.global_settings.file_path),
)
+201
View File
@@ -0,0 +1,201 @@
"""Strict Letta Code managed runtime inspection."""
from __future__ import annotations
import base64
import os
from typing import Any, List, Optional
import urllib.parse
from ._managed_files import (
MAX_CONFIG_BYTES,
MAX_SECRET_BYTES,
physical_directory_exists,
physical_file_exists,
read_physical_file,
)
from ._strict_json import JsonObject, parse_json_object
from .guard_template import generate_guard_script
from .hook_template import generate_hook_script
from .letta_command import same_letta_agent_id, same_letta_path
from .letta_contract import AGENT_KEY, LettaRuntimeContract, elydora_dir
def validate_api_origin(value: str, label: str = "base_url") -> None:
try:
parsed = urllib.parse.urlsplit(value)
hostname = parsed.hostname
parsed.port
except ValueError as error:
raise ValueError(f"{label} must be an absolute HTTP or HTTPS URL") from error
invalid_character = "\\" in value or any(
character.isspace() or ord(character) < 32 for character in value
)
if (
parsed.scheme not in ("http", "https")
or not parsed.netloc
or hostname is None
or invalid_character
):
raise ValueError(f"{label} must be an absolute HTTP or HTTPS URL")
if (
parsed.username is not None
or parsed.password is not None
or parsed.query
or parsed.fragment
):
raise ValueError(
f"{label} must exclude credentials, query parameters, and fragments"
)
def validate_private_key(value: str, label: str = "private_key") -> None:
try:
padded = value + "=" * ((4 - len(value) % 4) % 4)
seed = base64.b64decode(
padded.replace("-", "+").replace("_", "/"), validate=True
)
canonical = base64.urlsafe_b64encode(seed).rstrip(b"=").decode("ascii")
except (ValueError, UnicodeEncodeError) as error:
raise ValueError(
f"{label} must be a canonical 32-byte base64url value"
) from error
if len(seed) != 32 or canonical != value:
raise ValueError(f"{label} must be a canonical 32-byte base64url value")
def _require_non_empty_string(
value: Any, field: str, config_path: str
) -> str:
if not isinstance(value, str) or not value.strip():
raise ValueError(
f"Elydora runtime config {field} is invalid: {config_path}"
)
return value
def _validate_runtime_config(
config: JsonObject, expected_agent_id: str, config_path: str
) -> None:
supported = {"org_id", "agent_id", "kid", "base_url", "token", "agent_name"}
extra = next((key for key in config if key not in supported), None)
if extra is not None:
raise ValueError(
f'Elydora runtime config has unsupported field "{extra}": {config_path}'
)
_require_non_empty_string(config.get("org_id"), "org_id", config_path)
_require_non_empty_string(config.get("kid"), "kid", config_path)
agent_id = _require_non_empty_string(
config.get("agent_id"), "agent_id", config_path
)
if (
not same_letta_agent_id(agent_id, expected_agent_id)
or config.get("agent_name") != AGENT_KEY
):
raise ValueError(
"Elydora runtime identity does not match Letta Code hooks: "
f"{config_path}"
)
if "token" in config:
_require_non_empty_string(config.get("token"), "token", config_path)
base_url = _require_non_empty_string(
config.get("base_url"), "base_url", config_path
)
validate_api_origin(base_url, "Elydora runtime config base_url")
def _read_runtime_config(file_path: str) -> Optional[JsonObject]:
snapshot = read_physical_file(
file_path, "Elydora runtime config", MAX_CONFIG_BYTES
)
if snapshot is None:
return None
return parse_json_object(
snapshot.contents, f"Elydora runtime config at {file_path}"
)
def validate_runtime_tree(agent_directory: str, agent_id: str) -> None:
root = elydora_dir()
if not physical_directory_exists(root, "Elydora runtime directory"):
return
if not physical_directory_exists(
agent_directory, "Elydora agent runtime directory"
):
return
config_path = os.path.join(agent_directory, "config.json")
config = _read_runtime_config(config_path)
artifacts = (
("private.key", "Elydora private key"),
("guard.py", "Elydora guard runtime"),
("hook.py", "Elydora audit runtime"),
("chain-state.json", "Elydora chain state"),
("status-cache.json", "Elydora status cache"),
("error.log", "Elydora error log"),
)
artifact_exists = any(
physical_file_exists(os.path.join(agent_directory, name), label)
for name, label in artifacts
)
if config is None:
if artifact_exists:
raise ValueError(
"Elydora runtime identity cannot be verified without config.json: "
f"{agent_directory}"
)
return
configured_id = config.get("agent_id")
if (
not isinstance(configured_id, str)
or not same_letta_agent_id(configured_id, agent_id)
or config.get("agent_name") != AGENT_KEY
):
raise ValueError(
"Elydora runtime config identity does not match Letta Code agent "
f"{agent_id}: {config_path}"
)
def _runtime_contract_exists(contract: LettaRuntimeContract) -> bool:
root = elydora_dir()
agent_directory = os.path.dirname(contract.guard_path)
if (
not same_letta_path(os.path.dirname(agent_directory), root)
or not same_letta_path(
contract.audit_path, os.path.join(agent_directory, "hook.py")
)
):
return False
if not physical_directory_exists(root, "Elydora runtime directory"):
return False
if not physical_directory_exists(
agent_directory, "Elydora agent runtime directory"
):
return False
config_path = os.path.join(agent_directory, "config.json")
key_path = os.path.join(agent_directory, "private.key")
config = _read_runtime_config(config_path)
key = read_physical_file(key_path, "Elydora private key", MAX_SECRET_BYTES)
guard = read_physical_file(contract.guard_path, "Elydora guard runtime")
audit = read_physical_file(contract.audit_path, "Elydora audit runtime")
if config is None or key is None or guard is None or audit is None:
return False
_validate_runtime_config(config, contract.agent_id, config_path)
validate_private_key(key.contents, "Elydora private key")
expected_guard = generate_guard_script(AGENT_KEY, contract.agent_id)
expected_audit = generate_hook_script(
org_id=str(config["org_id"]),
agent_id=contract.agent_id,
kid=str(config["kid"]),
base_url=str(config["base_url"]),
fail_closed=True,
native_payload=True,
agent_name=AGENT_KEY,
)
return guard.contents == expected_guard and audit.contents == expected_audit
def letta_runtime_files_exist(
contracts: List[LettaRuntimeContract],
) -> bool:
return any(_runtime_contract_exists(contract) for contract in contracts)
@@ -0,0 +1,159 @@
"""Letta Code 0.28 settings discovery and effective hook controls."""
from __future__ import annotations
from dataclasses import dataclass
import os
from typing import Dict, Optional, Tuple
from ._managed_files import (
MAX_SOURCE_BYTES,
physical_directory_exists,
read_physical_file,
)
from ._transaction import FilePrecondition
from .letta_command import same_letta_path
from .letta_config import (
LettaDocument,
create_letta_document,
letta_document_label,
letta_source_label,
parse_letta_document,
)
@dataclass(frozen=True)
class LettaDisableControl:
disabled: bool
source: Optional[LettaDocument]
@dataclass(frozen=True)
class LettaSources:
home_directory: str
global_settings: LettaDocument
project: LettaDocument
project_local: LettaDocument
project_active: bool
disable_control: LettaDisableControl
preconditions: Tuple[FilePrecondition, ...]
def _home_directory() -> str:
home = os.environ.get("HOME") or os.path.expanduser("~")
return os.path.abspath(home)
def _comparison_path(file_path: str) -> str:
return os.path.normcase(os.path.abspath(file_path))
def _canonical_path(file_path: str) -> str:
return os.path.realpath(file_path)
def _read_document(kind: str, file_path: str) -> LettaDocument:
snapshot = read_physical_file(
file_path, letta_source_label(kind), MAX_SOURCE_BYTES
)
if snapshot is None:
return create_letta_document(kind, file_path)
return parse_letta_document(
kind=kind,
exists=True,
file_path=file_path,
raw=snapshot.contents,
snapshot=snapshot,
)
def _source_precondition(document: LettaDocument) -> FilePrecondition:
return FilePrecondition(
document.file_path,
letta_document_label(document),
document.snapshot,
MAX_SOURCE_BYTES,
)
def _deduplicate_preconditions(
values: list[FilePrecondition],
) -> Tuple[FilePrecondition, ...]:
result: Dict[str, FilePrecondition] = {}
for value in values:
result.setdefault(_comparison_path(value.file_path), value)
return tuple(result.values())
def _effective_disable(
global_settings: LettaDocument,
project: LettaDocument,
project_local: LettaDocument,
project_active: bool,
) -> LettaDisableControl:
if global_settings.hooks.get("disabled") is False:
return LettaDisableControl(False, global_settings)
if global_settings.hooks.get("disabled") is True:
return LettaDisableControl(True, global_settings)
if project_active and project.hooks.get("disabled") is True:
return LettaDisableControl(True, project)
if project_local.hooks.get("disabled") is True:
return LettaDisableControl(True, project_local)
return LettaDisableControl(False, None)
def read_letta_sources() -> LettaSources:
home_directory = _home_directory()
workspace = os.path.abspath(os.getcwd())
global_directory = os.path.join(home_directory, ".letta")
project_directory = os.path.join(workspace, ".letta")
physical_directory_exists(home_directory, "Letta Code home directory")
physical_directory_exists(
global_directory, "Letta Code global configuration directory"
)
if not same_letta_path(project_directory, global_directory):
physical_directory_exists(
project_directory, "Letta Code project configuration directory"
)
global_path = os.path.join(global_directory, "settings.json")
project_path = os.path.join(project_directory, "settings.json")
local_path = os.path.join(project_directory, "settings.local.json")
project_active = _comparison_path(_canonical_path(workspace)) != _comparison_path(
_canonical_path(home_directory)
)
global_settings = _read_document("global", global_path)
project = (
_read_document("project", project_path)
if project_active
else create_letta_document("project", project_path)
)
project_local = _read_document("project-local", local_path)
preconditions = [_source_precondition(global_settings)]
if project_active:
preconditions.append(_source_precondition(project))
preconditions.append(_source_precondition(project_local))
return LettaSources(
home_directory,
global_settings,
project,
project_local,
project_active,
_effective_disable(
global_settings, project, project_local, project_active
),
_deduplicate_preconditions(preconditions),
)
def require_letta_hooks_enabled(sources: LettaSources) -> None:
if not sources.disable_control.disabled:
return
source = sources.disable_control.source
location = (
f"{letta_document_label(source)} at {source.file_path}"
if source is not None
else "effective settings"
)
raise ValueError(
f"Letta Code hooks are disabled by hooks.disabled in {location}"
)
+1 -1
View File
@@ -68,7 +68,7 @@ SUPPORTED_AGENTS: Dict[str, Dict[str, str]] = {
},
"letta": {
"name": "Letta Code",
"hook_event": "PostToolUse",
"hook_event": "PreToolUse/PostToolUse/PostToolUseFailure",
"config_path": "~/.letta/settings.json",
},
"opencode": {