561 lines
22 KiB
Python
561 lines
22 KiB
Python
"""Delegation config knobs (delegation.* keys) and child credential/provider resolution.
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Split out of ``tools/delegate_tool.py``; every moved name is re-imported there, so
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``tools.delegate_tool.<name>`` keeps resolving (and monkeypatching) as before.
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"""
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from __future__ import annotations
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import logging
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import os
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from typing import Any, Optional
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from utils import base_url_hostname, is_truthy_value
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# Log-record parity with the origin module.
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logger = logging.getLogger("tools.delegate_tool")
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# Runtime-provider sentinel for providers that are not natively known; must
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# match hermes_cli.runtime_provider.RUNTIME_PROVIDER_TYPE_CUSTOM.
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_RUNTIME_PROVIDER_CUSTOM = "custom"
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_DEFAULT_MAX_CONCURRENT_CHILDREN = 10
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# One-shot guard: _get_max_concurrent_children() runs on every get_definitions()
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# schema rebuild, so the >10 cost advisory would otherwise log on every turn.
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_HIGH_CONCURRENCY_WARNED = False
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MAX_DEPTH = 1 # flat by default: parent (0) -> child (1); deeper needs max_spawn_depth
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_MIN_SPAWN_DEPTH = 1 # floor for the configurable cap; MAX_DEPTH stays the default
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_LEGACY_MAX_ASYNC_WARNED = False
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# No default wall-clock cap on children: legitimate heavy work (deep reviews,
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# research fan-outs, slow reasoning models) was being killed mid-task. Stuck-child
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# detection is the heartbeat staleness monitor; delegation.child_timeout_seconds
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# opts back in.
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DEFAULT_CHILD_TIMEOUT: Optional[float] = None
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# ── Subagent approval callbacks ─────────────────────────────────────────────
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# Subagent worker threads don't inherit the CLI's threading.local approval
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# callback, so prompt_dangerous_approval() would fall back to input() and
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# deadlock the parent's prompt_toolkit TUI. Every worker gets a non-interactive
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# callback via ThreadPoolExecutor(initializer=...): deny by default, approve when
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# delegation.subagent_auto_approve is true. Both warn for audit. Gateway sessions
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# are unaffected (they resolve approvals via tools/approval.py's per-session queue).
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def _subagent_auto_deny(command: str, description: str, **kwargs) -> str:
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"""Auto-deny (safe default): returns 'deny' so the child sees a recoverable refusal."""
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logger.warning(
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"Subagent auto-denied dangerous command: %s (%s). "
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"Set delegation.subagent_auto_approve: true to allow.",
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command, description,
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)
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return "deny"
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def _subagent_auto_approve(command: str, description: str, **kwargs) -> str:
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"""Auto-approve (opt-in YOLO via delegation.subagent_auto_approve): returns 'once'."""
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logger.warning(
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"Subagent auto-approved dangerous command: %s (%s)",
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command, description,
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)
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return "once"
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def _get_subagent_approval_callback():
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"""Callback for subagent worker threads per delegation.subagent_auto_approve (default False)."""
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from tools.delegate_tool import _load_config
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cfg = _load_config()
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val = cfg.get("subagent_auto_approve", False)
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if is_truthy_value(val):
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return _subagent_auto_approve
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return _subagent_auto_deny
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def _get_max_concurrent_children() -> int:
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"""delegation.max_concurrent_children > DELEGATION_MAX_CONCURRENT_CHILDREN env > 10.
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Floor of 1 is the only bound enforced; there is no ceiling.
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"""
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from tools.delegate_tool import _load_config
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cfg = _load_config()
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val = cfg.get("max_concurrent_children")
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if val is not None:
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try:
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result = max(1, int(val))
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if result > 10:
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global _HIGH_CONCURRENCY_WARNED
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if not _HIGH_CONCURRENCY_WARNED:
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_HIGH_CONCURRENCY_WARNED = True
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logger.warning(
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"delegation.max_concurrent_children=%d: each child consumes API tokens "
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"independently. High values multiply cost linearly.",
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result,
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)
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return result
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except (TypeError, ValueError):
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logger.warning(
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"delegation.max_concurrent_children=%r is not a valid integer; "
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"using default %d",
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val,
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_DEFAULT_MAX_CONCURRENT_CHILDREN,
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)
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return _DEFAULT_MAX_CONCURRENT_CHILDREN
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env_val = os.getenv("DELEGATION_MAX_CONCURRENT_CHILDREN")
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if env_val:
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try:
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return max(1, int(env_val))
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except (TypeError, ValueError):
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return _DEFAULT_MAX_CONCURRENT_CHILDREN
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return _DEFAULT_MAX_CONCURRENT_CHILDREN
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def _get_worktree_isolation() -> bool:
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"""delegation.worktree_isolation (bool, default False).
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When enabled each child gets its own git worktree off the parent's HEAD so
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parallel children never contend for one working copy. Git-only and
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local-backend-only; otherwise silently ignored (shared workspace as before).
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"""
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from tools.delegate_tool import _load_config
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cfg = _load_config()
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return bool(cfg.get("worktree_isolation", False))
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def _get_max_async_children() -> int:
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"""Concurrency cap for background delegations == delegation.max_concurrent_children.
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At capacity a new async dispatch is REJECTED (not queued) so a runaway model
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can't pile up unbounded background work; the caller then runs synchronously.
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A leftover ``delegation.max_async_children`` key is ignored with a one-time
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deprecation warning.
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"""
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from tools.delegate_tool import _get_max_concurrent_children, _load_config
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global _LEGACY_MAX_ASYNC_WARNED
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cfg = _load_config()
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if cfg.get("max_async_children") is not None and not _LEGACY_MAX_ASYNC_WARNED:
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_LEGACY_MAX_ASYNC_WARNED = True
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logger.warning(
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"delegation.max_async_children is deprecated and ignored; "
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"delegation.max_concurrent_children now caps background "
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"delegations too. Remove the stale key from config.yaml."
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)
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return _get_max_concurrent_children()
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def _get_child_timeout() -> Optional[float]:
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"""Hard wall-clock cap for one child, or None (default: no timeout).
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Failures should come from what the child does (API/tool errors, iteration
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budget), not a stopwatch; stuck children are caught by the heartbeat
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staleness monitor. delegation.child_timeout_seconds > 0 opts in (floor 30 s);
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0 or negative disables. Env fallback: DELEGATION_CHILD_TIMEOUT_SECONDS.
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"""
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from tools.delegate_tool import _load_config
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cfg = _load_config()
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val = cfg.get("child_timeout_seconds")
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if val is not None:
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try:
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parsed = float(val)
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except (TypeError, ValueError):
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logger.warning(
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"delegation.child_timeout_seconds=%r is not a valid number; "
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"using default (no timeout)",
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val,
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)
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else:
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return None if parsed <= 0 else max(30.0, parsed)
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env_val = os.getenv("DELEGATION_CHILD_TIMEOUT_SECONDS")
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if env_val:
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try:
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parsed = float(env_val)
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except (TypeError, ValueError):
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pass
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else:
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return None if parsed <= 0 else max(30.0, parsed)
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return DEFAULT_CHILD_TIMEOUT
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def _get_max_spawn_depth() -> int:
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"""delegation.max_spawn_depth floored at 1 (no ceiling).
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Depth 0 is the parent; agents at depths 0..N-1 may spawn, depth N is the
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leaf floor. Default 1 is flat. Each extra level multiplies API cost.
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"""
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from tools.delegate_tool import _load_config
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cfg = _load_config()
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val = cfg.get("max_spawn_depth")
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if val is None:
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return MAX_DEPTH
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try:
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ival = int(val)
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except (TypeError, ValueError):
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logger.warning(
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"delegation.max_spawn_depth=%r is not a valid integer; " "using default %d",
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val,
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MAX_DEPTH,
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)
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return MAX_DEPTH
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floored = max(_MIN_SPAWN_DEPTH, ival)
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if floored != ival:
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logger.warning(
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"delegation.max_spawn_depth=%d below floor %d; using %d",
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ival,
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_MIN_SPAWN_DEPTH,
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floored,
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)
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return floored
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def _get_orchestrator_enabled() -> bool:
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"""delegation.orchestrator_enabled kill switch (default True): False forces every child to leaf."""
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from tools.delegate_tool import _load_config
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cfg = _load_config()
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val = cfg.get("orchestrator_enabled", True)
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if isinstance(val, bool):
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return val
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# Accept "true"/"false" strings from YAML that doesn't auto-coerce.
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if isinstance(val, str):
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return val.strip().lower() in {"true", "1", "yes", "on"}
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return True
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def _get_inherit_mcp_toolsets() -> bool:
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"""Whether narrowed child toolsets should keep the parent's MCP toolsets."""
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from tools.delegate_tool import _load_config
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cfg = _load_config()
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return is_truthy_value(cfg.get("inherit_mcp_toolsets"), default=True)
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def _normalized_runtime_url(value: Any) -> str:
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return str(value or "").strip().rstrip("/")
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def _inherit_parent_capabilities(
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parent_agent, override_provider, override_base_url
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) -> Optional[dict]:
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"""Parent's endpoint-trust capability map for a child, or None.
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``agent.capabilities`` is a trust decision scoped to one provider+endpoint:
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inherited ONLY when the child runs the parent's exact route; any provider or
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base_url override stays DEFAULT-DENY (matches the /model switch posture).
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"""
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if override_provider or override_base_url:
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return None
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parent_caps = getattr(parent_agent, "capabilities", None)
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if not isinstance(parent_caps, dict):
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return None
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return {
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key: value
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for key, value in parent_caps.items()
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if isinstance(key, str) and isinstance(value, bool)
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}
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def _inherit_parent_base_url(parent_agent, fallback_base_url: Optional[str]) -> Optional[str]:
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"""Base URL the parent is actually calling (live client), not a stale attribute.
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``parent_agent.base_url`` can lag the live client (old OpenRouter URL vs
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local Ollama); inheriting the stale one 401s with a dummy/local key.
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"""
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surface_url = _normalized_runtime_url(fallback_base_url)
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client_kwargs = getattr(parent_agent, "_client_kwargs", None)
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if isinstance(client_kwargs, dict):
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kwargs_url = _normalized_runtime_url(client_kwargs.get("base_url"))
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if (
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kwargs_url
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and kwargs_url != surface_url
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and kwargs_url.startswith(("http://", "https://"))
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):
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return kwargs_url
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client = getattr(parent_agent, "client", None)
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if client is not None:
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# OpenAI SDK exposes base_url as httpx.URL — coerce before comparing.
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live_url = _normalized_runtime_url(getattr(client, "base_url", ""))
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if (
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live_url
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and live_url != surface_url
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and live_url.startswith(("http://", "https://"))
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):
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return live_url
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return fallback_base_url or None
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def _resolve_child_credential_pool(
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effective_provider: Optional[str],
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parent_agent,
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effective_base_url: Optional[str] = None,
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):
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"""Credential pool for the child: parent's pool (same provider), that
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provider's own pool, or None (child keeps its fixed credential).
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Custom endpoints all collapse to ``provider="custom"``, so they are matched
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by endpoint identity (the ``custom:<name>`` pool key) — sharing the parent's
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pool across different custom endpoints would overwrite the child's delegated
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base_url on lease.
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"""
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if not effective_provider:
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return getattr(parent_agent, "_credential_pool", None)
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parent_provider = getattr(parent_agent, "provider", None) or ""
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parent_pool = getattr(parent_agent, "_credential_pool", None)
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if effective_provider == "custom":
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try:
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from agent.credential_pool import get_custom_provider_pool_key, load_pool
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child_key = get_custom_provider_pool_key(effective_base_url)
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if child_key is None:
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# Unregistered endpoint (no custom_providers entry): keep the
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# child's fixed credential rather than inherit the parent's.
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return None
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parent_key = get_custom_provider_pool_key(
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getattr(parent_agent, "base_url", None)
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)
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if (
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parent_pool is not None
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and parent_provider == "custom"
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and parent_key is not None
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and parent_key == child_key
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):
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return parent_pool
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pool = load_pool(child_key)
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if pool is not None and pool.has_credentials():
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return pool
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except Exception as exc:
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logger.debug(
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"Could not resolve custom credential pool for child endpoint '%s': %s",
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effective_base_url,
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exc,
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)
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return None
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if parent_pool is not None and effective_provider == parent_provider:
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return parent_pool
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try:
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from agent.credential_pool import load_pool
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pool = load_pool(effective_provider)
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if pool is not None and pool.has_credentials():
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return pool
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except Exception as exc:
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logger.debug(
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"Could not load credential pool for child provider '%s': %s",
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effective_provider,
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exc,
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)
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return None
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def _merge_request_overrides(runtime_overrides, explicit_overrides):
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"""Merge explicit ``delegation.request_overrides`` OVER runtime-derived ones.
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Explicit top-level keys win; ``extra_body`` is deep-merged ONE level so
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provider personality (e.g. ``thinking: {type: disabled}``) survives unless
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the explicit dict redefines that exact key. Both sides are deep-copied so
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transport-side mutation can't leak into the config/runtime cache. Returns
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None when both sides are empty.
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"""
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import copy as _copy
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runtime_overrides = runtime_overrides if isinstance(runtime_overrides, dict) else None
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explicit_overrides = explicit_overrides if isinstance(explicit_overrides, dict) else None
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if not runtime_overrides and not explicit_overrides:
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return None
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merged = _copy.deepcopy(runtime_overrides) if runtime_overrides else {}
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explicit = _copy.deepcopy(explicit_overrides) if explicit_overrides else {}
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runtime_extra = merged.get("extra_body")
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explicit_extra = explicit.pop("extra_body", None)
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merged.update(explicit)
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if isinstance(runtime_extra, dict) and isinstance(explicit_extra, dict):
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runtime_extra.update(explicit_extra)
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merged["extra_body"] = runtime_extra
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elif explicit_extra is not None:
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merged["extra_body"] = explicit_extra
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return merged or None
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def _resolve_delegation_credentials(cfg: dict, parent_agent) -> dict:
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"""Resolve the child credential bundle from the ``delegation`` config section.
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Three branches: ``base_url`` set → direct endpoint (``api_key`` None means
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inherit the parent's key, so providers keyed outside OPENAI_API_KEY work);
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``provider`` set → full bundle via the runtime provider system (same path as
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CLI/gateway startup); neither → None values, child inherits everything.
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``request_overrides`` is honored on every branch. Raises ValueError with a
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user-facing message on credential failure.
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"""
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configured_model = str(cfg.get("model") or "").strip() or None
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configured_provider = str(cfg.get("provider") or "").strip() or None
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configured_base_url = str(cfg.get("base_url") or "").strip() or None
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configured_api_key = str(cfg.get("api_key") or "").strip() or None
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configured_api_mode = str(cfg.get("api_mode") or "").strip().lower() or None
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explicit_request_overrides = (
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cfg.get("request_overrides")
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if isinstance(cfg.get("request_overrides"), dict)
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else None
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)
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# Native-SDK providers speak their own wire protocol and can't be reached
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# via chat_completions against a base_url: always take the runtime-provider
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# path (a configured base_url still flows through it, e.g. a Bedrock region).
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_NATIVE_SDK_PROVIDERS = {"bedrock", "vertex", "google", "google-genai"}
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_provider_lower = (configured_provider or "").strip().lower()
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_is_native_sdk_provider = _provider_lower in _NATIVE_SDK_PROVIDERS
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if configured_base_url and not _is_native_sdk_provider:
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api_key = configured_api_key # None → inherited from parent in _build_child_agent
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# Shared URL-based api_mode detector so Anthropic-compatible direct
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# endpoints (/anthropic suffix: Azure AI Foundry, MiniMax, Zhipu, LiteLLM)
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# get the Messages transport instead of 404ing on chat_completions.
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from hermes_cli.runtime_provider import _detect_api_mode_for_url
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base_lower = configured_base_url.lower()
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provider = "custom"
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api_mode = _detect_api_mode_for_url(configured_base_url) or "chat_completions"
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if (
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base_url_hostname(configured_base_url) == "chatgpt.com"
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and "/backend-api/codex" in base_lower
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):
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provider = "openai-codex"
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api_mode = "codex_responses"
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elif base_url_hostname(configured_base_url) == "api.anthropic.com":
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provider = "anthropic"
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api_mode = "anthropic_messages"
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elif "api.kimi.com/coding" in base_lower:
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provider = "custom"
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api_mode = "anthropic_messages"
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# Explicit delegation.api_mode always wins over the URL heuristic.
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if configured_api_mode in {"chat_completions", "codex_responses", "anthropic_messages"}:
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api_mode = configured_api_mode
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# provider configured ALONGSIDE base_url: pull that provider's request
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# personality (request_overrides / max_output_tokens) onto the explicit
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# endpoint. Best-effort — a resolution failure only skips the overrides.
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request_overrides = None
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max_output_tokens = None
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if configured_provider:
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try:
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from hermes_cli.runtime_provider import resolve_runtime_provider
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runtime = resolve_runtime_provider(
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requested=configured_provider, target_model=configured_model
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)
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request_overrides = dict(runtime.get("request_overrides") or {}) or None
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max_output_tokens = runtime.get("max_output_tokens")
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except Exception as exc:
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logger.debug(
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"delegation.base_url: runtime resolution for provider '%s' "
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"failed; proceeding without request_overrides: %s",
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configured_provider,
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exc,
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)
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request_overrides = _merge_request_overrides(
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request_overrides, explicit_request_overrides
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)
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return {
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"model": configured_model,
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"provider": provider,
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"base_url": configured_base_url,
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"api_key": api_key,
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"api_mode": api_mode,
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"request_overrides": request_overrides,
|
|
"max_output_tokens": max_output_tokens,
|
|
}
|
|
|
|
if not configured_provider:
|
|
# Pure inherit; explicit request_overrides still merge OVER the parent's.
|
|
return {
|
|
"model": configured_model,
|
|
"provider": None,
|
|
"base_url": None,
|
|
"api_key": None,
|
|
"api_mode": None,
|
|
"request_overrides": _merge_request_overrides(
|
|
getattr(parent_agent, "request_overrides", None),
|
|
explicit_request_overrides,
|
|
),
|
|
"max_output_tokens": None,
|
|
}
|
|
|
|
# Provider is configured — resolve full credentials
|
|
try:
|
|
from hermes_cli.runtime_provider import resolve_runtime_provider
|
|
|
|
runtime = resolve_runtime_provider(requested=configured_provider, target_model=configured_model)
|
|
except Exception as exc:
|
|
raise ValueError(
|
|
f"Cannot resolve delegation provider '{configured_provider}': {exc}. "
|
|
f"Check that the provider is configured (API key set, valid provider name), "
|
|
f"or set delegation.base_url/delegation.api_key for a direct endpoint. "
|
|
f"Available providers: openrouter, nous, zai, kimi-coding, minimax."
|
|
) from exc
|
|
|
|
api_key = runtime.get("api_key", "")
|
|
if not api_key:
|
|
raise ValueError(
|
|
f"Delegation provider '{configured_provider}' resolved but has no API key. "
|
|
f"Set the appropriate environment variable or run 'hermes auth'."
|
|
)
|
|
|
|
# A pinned ACP transport command must exist — refuse loudly rather than let
|
|
# the child silently fall back to another transport.
|
|
pinned_command = runtime.get("command")
|
|
if pinned_command:
|
|
import shutil as _shutil
|
|
|
|
if not _shutil.which(pinned_command):
|
|
raise ValueError(
|
|
f"Delegation provider '{configured_provider}' is pinned to the "
|
|
f"'{pinned_command}' command, which was not found on PATH. "
|
|
f"Install it or choose a different delegation provider."
|
|
)
|
|
|
|
return {
|
|
"model": configured_model or runtime.get("model") or None,
|
|
"provider": configured_provider if runtime.get("provider") == _RUNTIME_PROVIDER_CUSTOM else runtime.get("provider"),
|
|
"base_url": runtime.get("base_url"),
|
|
"api_key": api_key,
|
|
"api_mode": runtime.get("api_mode"),
|
|
"request_overrides": _merge_request_overrides(
|
|
runtime.get("request_overrides"), explicit_request_overrides
|
|
)
|
|
or {},
|
|
"max_output_tokens": runtime.get("max_output_tokens"),
|
|
"command": runtime.get("command"),
|
|
"args": list(runtime.get("args") or []),
|
|
}
|
|
|
|
|
|
def _load_config() -> dict:
|
|
"""Return the ``delegation`` config section (read-only — do NOT mutate).
|
|
|
|
Prefers the shared ``load_config_readonly()`` (follows HERMES_HOME/profile;
|
|
no deepcopy, since this runs on every get_definitions() rebuild) over the
|
|
legacy ``cli.CLI_CONFIG``, which can hide user-set keys. Exception:
|
|
``HERMES_IGNORE_USER_CONFIG=1`` is only honored by the legacy loader, so it
|
|
stays authoritative when that flag is set.
|
|
"""
|
|
prefer_legacy = os.environ.get("HERMES_IGNORE_USER_CONFIG") == "1"
|
|
if not prefer_legacy:
|
|
try:
|
|
from hermes_cli.config import load_config_readonly
|
|
|
|
full = load_config_readonly()
|
|
cfg = full.get("delegation") or {}
|
|
if isinstance(cfg, dict):
|
|
return cfg
|
|
except Exception:
|
|
pass
|
|
try:
|
|
from cli import CLI_CONFIG
|
|
|
|
cfg = CLI_CONFIG.get("delegation") or {}
|
|
return cfg if isinstance(cfg, dict) else {}
|
|
except Exception:
|
|
return {}
|