027809f88e
- _stored_prompt_matches_runtime: with the Session ID trailer on (--pass-session-id / HERMES_TUI_PASS_SESSION_ID), a stored prompt whose Session ID line is not this session's is a mismatch. A /branch child now copies its parent's prompt bytes, and without this it told the model the parent's id. Gated on the flag so a "Session ID:" line in project text cannot force a rebuild every turn when the trailer is off. - _seed_workspace_pin: adopt only a real workspace block. A stored prompt that names this cwd but carries no block (built on a messaging surface, resumed on the CLI in the same repo) pinned "no workspace" and dropped the git snapshot for the rest of the session; now the next build captures one.
886 lines
46 KiB
Python
886 lines
46 KiB
Python
"""System-prompt assembly for :class:`AIAgent`.
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Built once per session and reused across turns (only context compression
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triggers a rebuild) so the upstream prefix cache stays warm. Three tiers are
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joined with ``\\n\\n``: ``stable`` (identity, guidance, env hints, coding brief,
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platform hints), ``context`` (workspace snapshot, caller ``system_message``,
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context files) and ``volatile`` (skills index, memory, USER.md, external memory
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provider, timestamp line). See ``references/system-prompt-invariant.md``.
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"""
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from __future__ import annotations
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import json
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import logging
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import os
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import re
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from pathlib import Path
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from typing import Any, Dict, List, Optional, Tuple
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from agent.delegation_context import owned_kanban_task
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from agent.prompt_builder import (
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DEFAULT_AGENT_IDENTITY, EXECUTION_GUIDANCE_MODELS, GOOGLE_MODEL_OPERATIONAL_GUIDANCE,
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HERMES_AGENT_HELP_GUIDANCE, HERMES_AGENT_HELP_GUIDANCE_NO_SKILLS, KANBAN_GUIDANCE,
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PARALLEL_TOOL_CALL_GUIDANCE, PLATFORM_HINTS, SESSION_SEARCH_GUIDANCE,
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SKILLS_GUIDANCE, STEER_CHANNEL_NOTE, TASK_COMPLETION_GUIDANCE, TELEGRAM_RICH_MESSAGES_HINT,
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TOOL_USE_ENFORCEMENT_GUIDANCE, TOOL_USE_ENFORCEMENT_MODELS, drain_truncation_warnings,
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)
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from agent import prompt_builder as _pb
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from agent.runtime_cwd import resolve_agent_cwd, resolve_context_cwd
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from hermes_constants import get_default_hermes_root, get_hermes_home
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from utils import is_truthy_value
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logger = logging.getLogger(__name__)
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_PLUGIN_SECTION_FRAME_RE = re.compile(
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r"^## Plugin Context: (?P<id>[a-z0-9][a-z0-9._-]{0,127})\n<!-- hermes-plugin-section-chars:(?P<chars>[0-9]{1,4}) -->\n\n",
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re.MULTILINE,
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)
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_GATE_WORDS = {**dict.fromkeys(("true", "always", "yes", "on"), True), **dict.fromkeys(("false", "never", "no", "off"), False)}
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def _model_gate(setting: Any, model: Optional[str], default_models) -> bool:
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"""Resolve a config gate: True/"true"-ish -> on, False/"false"-ish -> off,
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list -> case-insensitive model-substring match, anything else ("auto") ->
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match against *default_models*."""
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if setting is True or setting is False:
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return setting
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if isinstance(setting, str) and setting.lower() in _GATE_WORDS:
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return _GATE_WORDS[setting.lower()]
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model_lower = (model or "").lower()
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if isinstance(setting, list):
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return any(p.lower() in model_lower for p in setting if isinstance(p, str))
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return any(p in model_lower for p in default_models)
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def _resolve_platform_hint(agent: Any, platform_key: str, default_hint: str) -> str:
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"""Apply the ``platform_hints.<platform>`` config override: ``replace``
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substitutes the default, ``append`` adds text (a bare string is shorthand
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for append). Malformed entries fall back to the unmodified default so bad
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config can never break prompt assembly or leak across platforms."""
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overrides = getattr(agent, "_platform_hint_overrides", None)
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spec = overrides.get(platform_key) if platform_key and isinstance(overrides, dict) else None
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if isinstance(spec, str):
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spec = {"append": spec}
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if not isinstance(spec, dict):
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return default_hint
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replace_text, append_text = (v.strip() if isinstance(v, str) else "" for v in (spec.get("replace"), spec.get("append")))
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base = replace_text or default_hint
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return f"{base}\n\n{append_text}".strip() if append_text else base
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_TUI_EMBEDDED_PANE_CLARIFIER = (
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" You're in its embedded terminal pane, beside the GUI chat — the user can "
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"select your output (Option-drag on macOS, Shift-drag elsewhere) and press "
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"Cmd/Ctrl+L to send it to the chat composer."
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)
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def _tui_embedded_pane_clarifier(hint: str) -> str:
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"""Append the desktop embedded-terminal clarifier when ``HERMES_DESKTOP_TERMINAL``
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is set (only the desktop's TUI PTY, never the chat backend). Idempotent."""
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if not hint or _TUI_EMBEDDED_PANE_CLARIFIER in hint or not is_truthy_value(os.getenv("HERMES_DESKTOP_TERMINAL")):
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return hint
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return hint + _TUI_EMBEDDED_PANE_CLARIFIER
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def _plugin_session_info(agent: Any) -> Dict[str, str]:
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"""Return immutable-at-render-time metadata exposed to prompt sections."""
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try:
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cwd = str(resolve_context_cwd() or "")
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except Exception:
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cwd = ""
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info = {k: str(getattr(agent, k, None) or "") for k in ("session_id", "model", "provider", "platform")}
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info.update(profile_name=_active_profile_name(agent, _ambient_plugin_profile_name), cwd=cwd)
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return info
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def _ambient_plugin_profile_name() -> str:
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from hermes_cli.profiles import get_active_profile_name
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return str(get_active_profile_name() or "default")
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def _active_profile_name(agent: Any, ambient) -> str:
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"""Profile name from the agent's OWN home, else *ambient()*; "default" on any
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failure. Ambient resolution misreports on threads that lost the HERMES_HOME
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ContextVar, which is why the agent's home is preferred."""
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try:
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home = _agent_home(agent)
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return _profile_name_for_home(home) if home is not None else ambient()
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except Exception:
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return "default"
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def _frozen_plugin_prompt_sections(agent: Any) -> tuple:
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"""Render plugin sections once per session and freeze them on the agent.
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A restored ``_cached_system_prompt`` is parsed instead of re-running plugin
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code; a render that raises at a rebuild boundary keeps the previous bytes
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(stashed by ``invalidate_system_prompt``) instead of silently vanishing."""
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if hasattr(agent, "_plugin_system_prompt_sections_snapshot"):
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return agent._plugin_system_prompt_sections_snapshot
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stored_prompt = getattr(agent, "_cached_system_prompt", None)
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if isinstance(stored_prompt, str) and stored_prompt:
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rendered = _restore_plugin_prompt_sections(stored_prompt)
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else:
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try:
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from hermes_cli.plugins import render_system_prompt_sections
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rendered = tuple(render_system_prompt_sections(_plugin_session_info(agent)))
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except Exception as exc:
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rendered = getattr(agent, "_plugin_system_prompt_sections_previous", None)
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if rendered:
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logger.warning("Plugin system prompt sections failed to re-render (%s); keeping the previous frozen sections", exc)
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else:
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logger.warning("Plugin system prompt sections could not be rendered: %s", exc)
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rendered = ()
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agent._plugin_system_prompt_sections_snapshot = rendered
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return rendered
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def _restore_plugin_prompt_sections(prompt: str) -> tuple:
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"""Recover frozen section bytes from the persisted full prompt. Only the
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exact canonical container emitted by core is accepted — user/project text
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may resemble a frame."""
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from hermes_cli.plugins import (
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MAX_SYSTEM_PROMPT_SECTION_CHARS, PLUGIN_SECTIONS_END, PLUGIN_SECTIONS_START,
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RenderedPluginSystemPromptSection, format_system_prompt_sections,
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)
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start = prompt.rfind(PLUGIN_SECTIONS_START)
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end = prompt.find(PLUGIN_SECTIONS_END, start + len(PLUGIN_SECTIONS_START)) if start >= 0 else -1
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if end < 0:
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return ()
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after_end = end + len(PLUGIN_SECTIONS_END)
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if not prompt[after_end:].startswith("\n\nConversation started:"):
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return ()
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framed = prompt[start:after_end]
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restored = []
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for match in _PLUGIN_SECTION_FRAME_RE.finditer(framed):
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content_len = int(match.group("chars"))
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content = framed[match.end() : match.end() + content_len]
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if content_len > MAX_SYSTEM_PROMPT_SECTION_CHARS or len(content) != content_len:
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continue
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restored.append(RenderedPluginSystemPromptSection(id=match.group("id"), content=content,
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position="after_memory", plugin="persisted-prompt"))
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return tuple(restored) if format_system_prompt_sections(restored) == framed else ()
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def restore_plugin_prompt_sections(agent: Any, prompt: str) -> None:
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"""Seed a resumed agent's frozen snapshot from persisted prompt bytes."""
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agent._plugin_system_prompt_sections_snapshot = _restore_plugin_prompt_sections(prompt)
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def _plugin_section_blocks(sections: tuple, position: str) -> List[str]:
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from hermes_cli.plugins import format_system_prompt_sections
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block = format_system_prompt_sections([s for s in sections if s.position == position])
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return [block] if block else []
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def _session_start_like(agent: Any, now: Any) -> Any:
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"""Best-known conversation start time, or ``now`` as a fallback.
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``Conversation started:`` must be byte-stable across rebuilds (compression,
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resume, fresh gateway turns), so prefer immutable sources in order: the
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lineage-root session id's embedded stamp (compaction rotates ids, each with
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its own mint time), the current session id's stamp, ``agent.session_start``,
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then ``now``. Stamps are box-local wall-clock: attach that zone first, then
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convert to ``now``'s zone so the date matches the per-turn clock.
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0. the LINEAGE-ROOT session id's embedded timestamp — compaction can rotate the session id, and each
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rotated id embeds its OWN mint time, so after months of compactions rung 1 alone would quietly re-birth
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the conversation at its latest rotation. Walking to the lineage root (same walk as
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``_conversation_root_id``) recovers the ORIGINAL birth stamp — a Bot Mode forever-chat keeps knowing
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when it was first born, across every compaction (maintainer-directed, #98426); 1. the timestamp embedded
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in ``session_id`` (``YYYYMMDD_HHMMSS_...``) — immutable for the life of the session, so the line is
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byte-stable across every rebuild boundary (preserving prefix-cache KV); 2. 3. ``now`` (initial/legacy
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build without either).
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"""
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from datetime import datetime
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def _to_display_tz(dt: Any) -> Any:
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if dt.tzinfo is None:
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try:
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dt = dt.replace(tzinfo=datetime.now().astimezone().tzinfo)
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except (ValueError, OSError):
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pass
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if getattr(now, "tzinfo", None) is not None and dt.tzinfo is not None:
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try:
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dt = dt.astimezone(now.tzinfo)
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except (ValueError, OSError):
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pass
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return dt
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session_id = getattr(agent, "session_id", None)
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db = getattr(agent, "_session_db", None)
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try:
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root_id = db.get_conversation_root(session_id) if db is not None and isinstance(session_id, str) and session_id else None
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except Exception:
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root_id = None
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for candidate in (root_id, session_id):
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m = re.match(r"^(\d{8})_(\d{6})", candidate) if isinstance(candidate, str) else None
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if m:
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try:
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return _to_display_tz(datetime.strptime(f"{m.group(1)}_{m.group(2)}", "%Y%m%d_%H%M%S"))
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except ValueError:
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pass
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session_start = getattr(agent, "session_start", None)
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return _to_display_tz(session_start) if hasattr(session_start, "astimezone") else now
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def _agent_home(agent: Any) -> Optional[Path]:
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"""The agent's OWN profile home, or None to use ambient resolution.
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A bound HERMES_HOME ContextVar override wins (the gateway multiplexes
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profiles over one shared session DB and binds the home per turn); else the
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parent of ``_session_db.db_path`` — ground truth on threads that lost the
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ContextVar, where ambient resolution would leak the launch profile.
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1. Surfaces that multiplex several profiles over ONE shared session DB (the messaging gateway:
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``gateway/run.py`` hands every agent the launch-home ``state.db`` and binds the profile home per turn
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via ``_profile_runtime_scope`` + ``copy_context``) would otherwise have the db-derived launch home STOMP
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the correctly-bound profile — inverting the leak this helper exists to fix (found by @kshitijk4poor's
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post-merge probe on #86313). 2. Fallback: the home containing the agent's ``_session_db.db_path``
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(``<home>/state.db``) — ground truth on threads that lost the ContextVar (ContextVars don't propagate
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into ``threading.Thread``), where the unbound build previously fell back to the launch home and leaked
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the default profile's skills/identity into a bot prompt.
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"""
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try:
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from hermes_constants import get_hermes_home_override
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override = get_hermes_home_override()
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if override:
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return Path(override)
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except Exception:
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pass
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try:
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db_path = getattr(getattr(agent, "_session_db", None), "db_path", None)
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return Path(db_path).parent if db_path else None
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except Exception:
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return None
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def _agent_skills_dir(agent: Any) -> Optional[Path]:
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"""The agent's own ``<home>/skills`` dir, or None to use ambient home."""
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home = _agent_home(agent)
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return home / "skills" if home is not None else None
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def _profile_name_for_home(home: Path) -> str:
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"""``<root>/profiles/X`` -> ``"X"``; anything else -> ``"default"``.
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Uses ``get_default_hermes_root()`` (NOT ``get_hermes_home()``): on a bound
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profile session the ambient home IS the profile dir, so every profile
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would misreport as "default"."""
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try:
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from hermes_constants import get_default_hermes_root
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rel = home.resolve().relative_to((get_default_hermes_root() / "profiles").resolve())
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return rel.parts[0] if rel.parts else "default"
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except (ValueError, OSError):
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return "default"
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def _tool_guidance_block(agent: Any) -> Optional[str]:
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"""Tool-aware behavioral guidance, injected only when the tools are loaded."""
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names = agent.valid_tool_names
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# With both memory stores disabled no store is built, so the full guidance
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# would steer the model at a tool that always answers "Memory is not
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# available"; with only USER.md enabled the narrower block is used.
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memory_guidance = None
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if "memory" in names:
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memory_guidance = _pb.build_memory_guidance(
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getattr(agent, "_memory_enabled", True),
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getattr(agent, "_user_profile_enabled", True),
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skill_manage_available="skill_manage" in names,
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)
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# Kanban lifecycle: resolved once at __init__ (_kanban_worker_guidance);
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# fallback paths must also limit task protocol guidance to dispatcher workers.
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_kanban_guidance = getattr(agent, "_kanban_worker_guidance", None)
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if _kanban_guidance is None and "kanban_show" in names and owned_kanban_task():
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_kanban_guidance = KANBAN_GUIDANCE
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tool_guidance = [
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memory_guidance,
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SESSION_SEARCH_GUIDANCE if "session_search" in names else None,
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SKILLS_GUIDANCE if "skill_manage" in names else None,
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_kanban_guidance,
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]
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return " ".join(g for g in tool_guidance if g) or None
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def _skills_prompt(agent: Any) -> str:
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"""Skills index (empty without skills tools). Focus mode demotes non-coding
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categories to names-only — never hidden, every name stays visible."""
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if not any(name in agent.valid_tool_names for name in ['skills_list', 'skill_view', 'skill_manage']):
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return ""
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import model_tools
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avail_toolsets = {model_tools.get_toolset_for_tool(tool_name) for tool_name in agent.valid_tool_names} - {None, ""}
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try:
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from agent.coding_context import coding_compact_skill_categories
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_compact_cats = coding_compact_skill_categories(platform=agent.platform, cwd=resolve_context_cwd())
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except Exception:
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_compact_cats = frozenset()
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return _pb.build_skills_system_prompt(available_tools=agent.valid_tool_names, available_toolsets=avail_toolsets,
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compact_categories=_compact_cats or None, skills_dir_override=_agent_skills_dir(agent))
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def _auto_load_parts(agent: Any) -> List[str]:
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"""``skills.auto_load`` blocks, resolved once per agent lifecycle (config, skill files and
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HERMES_IGNORE_RULES are read on the first build only) so the prompt stays byte-stable
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across model switches, compression and static-prefix restoration.
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Same gate as ``_skills_prompt``: nothing without the skills toolset, and nothing for agents that skip
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context files (delegate children, curator/review forks, gateway hygiene agents) — pinned skills are
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operator guidance for the user's session, not payload for every internal fork."""
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if getattr(agent, "skip_context_files", False) or not any(
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name in agent.valid_tool_names for name in ("skills_list", "skill_view", "skill_manage")):
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return []
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if not getattr(agent, "_auto_load_skills_resolved", False):
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result: Tuple[str, List[str], List[str]] = ("", [], [])
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try:
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if not is_truthy_value(os.environ.get("HERMES_IGNORE_RULES")):
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from agent.skill_commands import build_auto_load_prompt
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result = build_auto_load_prompt(task_id=getattr(agent, "session_id", None), home_override=_agent_home(agent))
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if result[2]:
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logger.warning("skills.auto_load: skill(s) not found or disabled, skipped: %s", ", ".join(result[2]))
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except Exception:
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logger.debug("skills.auto_load: injection skipped", exc_info=True) # config errors never block session start
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agent._auto_load_skills_result = result
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agent._auto_load_skills_resolved = True
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prompt = agent._auto_load_skills_result[0]
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return [prompt] if prompt else []
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def _bot_mode_parts(agent: Any) -> List[str]:
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"""Bot Mode teammate protocol — only in a bot's canonical "Bot Chat" session.
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Marks the prompt timeless (the volatile date line is dropped) since a birth
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date pinned in a months-long session is misinformation."""
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parts: List[str] = []
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try:
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from tools.bot_mode_probe import BOT_CHAT_TITLE, epoch_line, get_bot_mode_protocol_section
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_title = str(getattr(agent, "_session_title_hint", "") or "").strip()
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if not _title:
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_sdb = getattr(agent, "_session_db", None)
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_sid = getattr(agent, "session_id", None)
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_title = str((_sdb.get_session_title(_sid) if (_sdb and _sid) else None) or "").strip()
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_bot_section = get_bot_mode_protocol_section(_agent_home(agent)) if _title == BOT_CHAT_TITLE else None
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if _bot_section:
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parts.append(_bot_section)
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# Capability epoch lets the restore path rebuild ONCE per
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# user-initiated capability change in an eternal session.
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parts.append(epoch_line(_agent_home(agent)))
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agent._bot_chat_timeless_prompt = True
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except Exception:
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pass
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return parts
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def _ambient_file_safety_profile_name() -> str:
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from agent.file_safety import _resolve_active_profile_name
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return _resolve_active_profile_name()
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def _active_profile_line(agent: Any) -> str:
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"""Name the running profile so the agent doesn't conflate ``~/.hermes/skills``
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(default) with ``~/.hermes/profiles/<active>/skills``. Resolved from the
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agent's OWN home first (a build thread that lost the ContextVar would
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otherwise print "default" for a bot profile)."""
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_agent_home_path = _agent_home(agent)
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active_profile = _active_profile_name(agent, _ambient_file_safety_profile_name)
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if active_profile == "default":
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# With an explicit agent home, the default profile's data lives at the
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# ROOT (get_hermes_home() on a bound profile session is the PROFILE dir).
|
|
# Without one, keep the ambient (patchable) resolution byte-identical.
|
|
_root_str = str(get_default_hermes_root() if _agent_home_path is not None else get_hermes_home())
|
|
return (
|
|
"Active Hermes profile: default. Other profiles (if any) live "
|
|
"under " + _root_str + "/profiles/<name>/. Each profile has its own "
|
|
"skills/, plugins/, cron/, and memories/ that affect a different "
|
|
"session than this one. Do not modify another profile's "
|
|
"skills/plugins/cron/memories unless the user explicitly directs "
|
|
"you to."
|
|
)
|
|
# A non-default name is only returned when the resolved home is ALREADY
|
|
# <root>/profiles/<name>, so the profile home is the session home itself.
|
|
profile_home = str(_agent_home_path) if _agent_home_path is not None else str(get_hermes_home())
|
|
# A non-default name is only ever returned when the resolved home is ALREADY <root>/profiles/<name> —
|
|
# that is exactly how both _profile_name_for_home() and _resolve_active_profile_name() derive it. So the
|
|
# profile home is the session home itself; appending /profiles/<name> again doubled it (#72894). The
|
|
# default profile's data sits at the ROOT (get_default_hermes_root()), which in ambient profile mode is
|
|
# NOT get_hermes_home().
|
|
default_root = get_default_hermes_root()
|
|
return (
|
|
f"Active Hermes profile: {active_profile}. This session reads "
|
|
f"and writes {profile_home}/. The default "
|
|
f"profile's data lives at {default_root}/skills/, {default_root}/plugins/, "
|
|
f"{default_root}/cron/, {default_root}/memories/ — those belong to a "
|
|
f"different session run from a different shell. Do NOT modify "
|
|
f"another profile's skills/plugins/cron/memories unless the user "
|
|
f"explicitly directs you to."
|
|
)
|
|
|
|
|
|
def _default_platform_hint(platform_key: str) -> str:
|
|
"""Built-in hint, else the plugin adapter's ``platform_hint``, else ``""``."""
|
|
hint = PLATFORM_HINTS.get(platform_key, "")
|
|
if not hint and platform_key:
|
|
try:
|
|
from gateway.platform_registry import platform_registry
|
|
_entry = platform_registry.get(platform_key)
|
|
hint = (_entry and _entry.platform_hint) or ""
|
|
except Exception:
|
|
pass
|
|
if platform_key == "telegram" and hint and _telegram_rich_messages_enabled():
|
|
hint = hint.rstrip() + " " + TELEGRAM_RICH_MESSAGES_HINT
|
|
return hint
|
|
|
|
|
|
def _cron_delivery_hint(agent: Any) -> str:
|
|
"""The destination channel's hint (default + its ``platform_hints`` override) for a cron agent.
|
|
|
|
A cron agent runs as platform ``cron`` but its final response lands on the job's ``deliver``
|
|
channel, so without this the model never learns that MEDIA: tags become Slack/Telegram
|
|
attachments or that tables do not render there — and a user's ``platform_hints.slack.append``
|
|
never reached scheduled jobs at all. The scheduler publishes the primary auto-deliver target
|
|
into the session ContextVar before the agent runs (same seam ``send_message`` routes by).
|
|
"""
|
|
from gateway.session_context import get_session_env
|
|
deliver_key = get_session_env("HERMES_CRON_AUTO_DELIVER_PLATFORM", "").lower().strip()
|
|
if not deliver_key or deliver_key == "cron":
|
|
return ""
|
|
hint = _resolve_platform_hint(agent, deliver_key, _default_platform_hint(deliver_key))
|
|
return f"Delivery destination ({deliver_key}): {hint}" if hint else ""
|
|
|
|
|
|
def platform_hint(agent: Any) -> str:
|
|
"""Built-in/plugin platform hint + Telegram rich-messages opt-in + config
|
|
override + desktop TUI clarifier; cron agents also carry their delivery channel's hint."""
|
|
platform_key = (agent.platform or "").lower().strip()
|
|
_effective_hint = _resolve_platform_hint(agent, platform_key, _default_platform_hint(platform_key))
|
|
if platform_key == "tui" and _effective_hint:
|
|
_effective_hint = _tui_embedded_pane_clarifier(_effective_hint)
|
|
if platform_key == "cron":
|
|
_delivery = _cron_delivery_hint(agent)
|
|
if _delivery:
|
|
_effective_hint = f"{_effective_hint}\n\n{_delivery}".strip()
|
|
return _effective_hint
|
|
|
|
|
|
def _telegram_rich_messages_enabled() -> bool:
|
|
"""``rich_messages`` from the Telegram ``extra`` config; same precedence the
|
|
adapter uses (top-level ``platforms.telegram.extra`` overrides
|
|
``gateway.platforms.telegram.extra`` at the leaf). False on any read failure."""
|
|
try:
|
|
from hermes_cli.config import load_config_readonly
|
|
_cfg = load_config_readonly()
|
|
_gw = (((_cfg.get("gateway") or {}).get("platforms") or {}).get("telegram") or {}).get("extra")
|
|
_top = ((_cfg.get("platforms") or {}).get("telegram") or {}).get("extra")
|
|
merged = {**(_gw if isinstance(_gw, dict) else {}), **(_top if isinstance(_top, dict) else {})}
|
|
return bool(merged.get("rich_messages"))
|
|
except Exception:
|
|
return False
|
|
|
|
|
|
def _zone_bits(now: Any, tz: Any) -> List[str]:
|
|
"""IANA key, abbreviation (if different) and UTC offset — all constant for
|
|
the day, so the byte-stable date line stays cacheable."""
|
|
_iana = getattr(tz, "key", None)
|
|
from hermes_time import safe_strftime
|
|
_abbrev = safe_strftime(now, "%Z")
|
|
_offset = safe_strftime(now, "%z") # '-0400' -> 'UTC-04:00'
|
|
bits = [_iana] if _iana else []
|
|
if _abbrev and _abbrev != _iana:
|
|
bits.append(_abbrev)
|
|
if _offset:
|
|
bits.append(f"UTC{_offset[:3]}:{_offset[3:]}")
|
|
return bits
|
|
|
|
|
|
def _timestamp_line(agent: Any) -> str:
|
|
"""Date-only so the prompt is byte-stable for the day; zone + offset so
|
|
tools needn't guess EST vs EDT. Long-lived sessions get an "as of" line on
|
|
rebuild days (the cache prefix is already invalidated at that boundary)."""
|
|
from hermes_time import get_timezone as _hermes_tz, now as _hermes_now, safe_strftime
|
|
now = _hermes_now()
|
|
_bits = _zone_bits(now, _hermes_tz())
|
|
_zone_suffix = f" ({', '.join(_bits)})" if _bits else ""
|
|
_start = _session_start_like(agent, now)
|
|
timestamp_line = f"Conversation started: {safe_strftime(_start, '%A, %B %d, %Y')}{_zone_suffix}"
|
|
# Second line (maintainer design, salvaging #96224's anchor): long-lived sessions — Bot Mode
|
|
# forever-chats, messenger channels people never close — span many days and many compactions. A lone
|
|
# birth date leads the model to believe it is still living in that old day. The prompt is rebuilt at
|
|
# every compaction boundary, so stamp the rebuild day too: 'started' stays anchored and byte-stable, 'as
|
|
# of' refreshes exactly when the cache prefix is already being invalidated (compaction), so the added
|
|
# line costs no extra cache churn. Same-day sessions skip the second line entirely — nothing to correct,
|
|
# and the single-line shape stays byte-identical for the day (prefix-cache safe).
|
|
if now.strftime("%Y%m%d") != _start.strftime("%Y%m%d"):
|
|
timestamp_line += (f"\nToday's date (as of the last context rebuild): {safe_strftime(now, '%A, %B %d, %Y')} "
|
|
"— trust this over the start date for what day it is now; query tools for exact time.")
|
|
if getattr(agent, "_bot_chat_timeless_prompt", False):
|
|
timestamp_line = f"Timezone: {', '.join(_bits)}" if _bits else ""
|
|
trailer = (("Session ID", agent.session_id if agent.pass_session_id else None), ("Model", agent.model),
|
|
("Provider", agent.provider), ("Platform", agent.platform))
|
|
return timestamp_line + "".join(f"\n{label}: {value}" for label, value in trailer if value)
|
|
|
|
|
|
def _memory_parts(agent: Any) -> List[str]:
|
|
"""Built-in memory/USER.md blocks plus the external provider block (gated on
|
|
the same check ``inject_memory_provider_tools`` uses, so we never advertise
|
|
tools the toolset config gated off)."""
|
|
parts: List[str] = []
|
|
if agent._memory_store:
|
|
for enabled, kind in ((agent._memory_enabled, "memory"), (agent._user_profile_enabled, "user")):
|
|
block = agent._memory_store.format_for_system_prompt(kind) if enabled else None
|
|
if block:
|
|
parts.append(block)
|
|
# External memory provider system prompt block (additive to built-in). Gated on the same check
|
|
# ``inject_memory_provider_tools`` uses so we never advertise provider tools that the agent's toolset
|
|
# configuration has already gated off (#81014).
|
|
if agent._memory_manager:
|
|
try:
|
|
from agent.memory_manager import memory_provider_tools_exposed as _mem_exposed
|
|
except Exception:
|
|
_mem_exposed = None
|
|
if _mem_exposed is None or _mem_exposed(agent):
|
|
try:
|
|
_ext_mem_block = agent._memory_manager.build_system_prompt()
|
|
except Exception:
|
|
_ext_mem_block = None
|
|
if _ext_mem_block:
|
|
parts.append(_ext_mem_block)
|
|
return parts
|
|
|
|
|
|
def _identity_parts(agent: Any, ctx_len: Optional[int]) -> Tuple[List[str], bool]:
|
|
"""SOUL.md (primary identity; cron keeps the persona while skipping cwd
|
|
instructions, scoped to the agent's OWN home) or the default identity.
|
|
Returns ``(parts, soul_loaded)``."""
|
|
wants_soul = agent.load_soul_identity or not agent.skip_context_files
|
|
_soul_content = _pb.load_soul_md(ctx_len, home_override=_agent_home(agent)) if wants_soul else None
|
|
return ([_soul_content], True) if _soul_content else ([DEFAULT_AGENT_IDENTITY], False)
|
|
|
|
|
|
def _guidance_parts(agent: Any) -> List[str]:
|
|
"""Universal + tool-aware + model-gated guidance blocks, each gated by its config.yaml key."""
|
|
parts: List[str] = []
|
|
if agent.valid_tool_names:
|
|
parts += [
|
|
text for flag, text in (
|
|
("_task_completion_guidance", TASK_COMPLETION_GUIDANCE),
|
|
("_parallel_tool_call_guidance", PARALLEL_TOOL_CALL_GUIDANCE),
|
|
) if getattr(agent, flag, True)
|
|
]
|
|
parts.append(_tool_guidance_block(agent)) # None/empty entries are dropped by _join_tier
|
|
if not agent.valid_tool_names:
|
|
return parts
|
|
# Steering only lands inside tool results, so only reachable with tools.
|
|
parts.append(STEER_CHANNEL_NOTE)
|
|
# agent.tool_use_enforcement / agent.execution_guidance: "auto" (default)
|
|
# matches the hardcoded model lists; true/false force; a list gives custom
|
|
# model-name substrings. Execution guidance is an independent gate so
|
|
# DeepSeek/Kimi/Qwen-class models get it even with enforcement off.
|
|
if _model_gate(agent._tool_use_enforcement, agent.model, TOOL_USE_ENFORCEMENT_MODELS):
|
|
parts.append(TOOL_USE_ENFORCEMENT_GUIDANCE)
|
|
if any(g in (agent.model or "").lower() for g in ("gemini", "gemma")):
|
|
parts.append(GOOGLE_MODEL_OPERATIONAL_GUIDANCE)
|
|
if _model_gate(getattr(agent, "_execution_guidance", "auto"), agent.model, EXECUTION_GUIDANCE_MODELS):
|
|
from agent.prompt_builder import execution_guidance_text
|
|
parts.append(execution_guidance_text())
|
|
return parts
|
|
|
|
|
|
def _alibaba_identity_part(agent: Any) -> List[str]:
|
|
"""Alibaba Coding Plan always reports "glm-4.7" as the model name; inject
|
|
the real identity so the agent can answer correctly."""
|
|
if agent.provider != "alibaba":
|
|
return []
|
|
_model_short = agent.model.rsplit("/", 1)[-1]
|
|
return [
|
|
f"You are powered by the model named {_model_short}. "
|
|
f"The exact model ID is {agent.model}. "
|
|
f"When asked what model you are, always answer based on this information, "
|
|
f"not on any model name returned by the API."
|
|
]
|
|
|
|
|
|
def _workspace_pin_key() -> str:
|
|
"""The directory the workspace probe inspects, which is also the prompt's ``Current working
|
|
directory``: a build with no cwd bound (launch dir) and a later one binding that same dir
|
|
(TUI ``/compress``) are one workspace, not two."""
|
|
try:
|
|
return str(resolve_context_cwd() or resolve_agent_cwd())
|
|
except OSError: # deleted cwd
|
|
return ""
|
|
|
|
|
|
def _persisted_workspace_block(prompt: str, key: str) -> Optional[str]:
|
|
"""The workspace snapshot inside ``prompt`` taken for ``key`` (its ``- Root:`` is ``key`` or an
|
|
ancestor); "" when the prompt has none; None when it has one for another root."""
|
|
from agent.coding_context import WORKSPACE_BLOCK_HEADER
|
|
head = f"\n\n{WORKSPACE_BLOCK_HEADER}\n- Root: "
|
|
start = prompt.find(head)
|
|
if start < 0:
|
|
return ""
|
|
cwd = Path(key).resolve()
|
|
while start >= 0:
|
|
block = prompt[start + 2:].split("\n\n", 1)[0]
|
|
root = Path(block.split("\n", 2)[1][len("- Root: "):]).resolve()
|
|
if root == cwd or root in cwd.parents:
|
|
return block
|
|
start = prompt.find(head, start + 2)
|
|
return None
|
|
|
|
|
|
def _session_prompt(agent: Any) -> Optional[str]:
|
|
"""Prompt bytes this session already sends: the cached copy, else its persisted row."""
|
|
cached = getattr(agent, "_cached_system_prompt", None)
|
|
if isinstance(cached, str) and cached:
|
|
return cached
|
|
db, session_id = getattr(agent, "_session_db", None), getattr(agent, "session_id", None)
|
|
if db is None or not isinstance(session_id, str) or not session_id:
|
|
return None
|
|
try:
|
|
row = db.get_session(session_id)
|
|
except Exception:
|
|
logger.debug("workspace snapshot: session row read failed (session=%s)", session_id, exc_info=True)
|
|
return None
|
|
prompt = row.get("system_prompt") if isinstance(row, dict) else None
|
|
return prompt if isinstance(prompt, str) and prompt else None
|
|
|
|
|
|
def _seed_workspace_pin(agent: Any, key: str) -> None:
|
|
"""Pin the snapshot the session's existing prompt already carries. An agent that did not
|
|
build those bytes (resumed, or a fresh gateway/TUI agent whose first act is ``/compress``)
|
|
would otherwise re-probe git at its first rebuild and rewrite the prompt for any repo that
|
|
moved since session start. Only a snapshot provably taken in this cwd is adopted."""
|
|
from agent.surface_switch import runtime_host_value
|
|
prompt = _session_prompt(agent)
|
|
if not prompt:
|
|
return
|
|
stored_cwd = runtime_host_value(prompt, "Current working directory")
|
|
if stored_cwd and stored_cwd != key:
|
|
return
|
|
block = _persisted_workspace_block(prompt, key)
|
|
# Only a real snapshot is adopted: a prompt without one (built on a surface without the
|
|
# coding posture, or with tools off) leaves the pin open so this build captures one.
|
|
if block:
|
|
agent._frozen_workspace_snapshot = (key, block)
|
|
|
|
|
|
def _coding_parts(agent: Any) -> Tuple[List[str], List[str], List[str]]:
|
|
"""``(prefix, workspace, trailing)`` coding-posture blocks; all empty
|
|
without tools or when probing fails (it must never block prompt build).
|
|
|
|
The workspace block is a live git probe after project context, ahead of the whole
|
|
volatile band; re-probing at the compaction rebuild re-emits different bytes for any
|
|
repo that moved and defeats the keep-prompt fast path. So the bytes are pinned per
|
|
session on the agent, keyed by the probed cwd (a gateway serves many cwds), seeded from
|
|
the session's existing prompt when this agent did not build it, and replayed on
|
|
rebuilds; ``reset_session_state`` drops the pin at a session boundary.
|
|
"""
|
|
try:
|
|
from agent.coding_context import coding_system_prompt_parts
|
|
if not agent.valid_tool_names:
|
|
return [], [], []
|
|
cwd = resolve_context_cwd()
|
|
cwd_key = _workspace_pin_key()
|
|
if getattr(agent, "_frozen_workspace_snapshot", None) is None:
|
|
_seed_workspace_pin(agent, cwd_key)
|
|
pinned = getattr(agent, "_frozen_workspace_snapshot", None)
|
|
# "" is a real pinned value (no workspace here) — only a cwd mismatch re-probes.
|
|
replay = pinned[1] if pinned is not None and pinned[0] == cwd_key else None
|
|
parts = coding_system_prompt_parts(platform=agent.platform, cwd=cwd, model=agent.model,
|
|
valid_tool_names=agent.valid_tool_names, workspace_block=replay)
|
|
if replay is None:
|
|
agent._frozen_workspace_snapshot = (cwd_key, parts[1][0] if parts[1] else "")
|
|
return parts
|
|
except Exception:
|
|
pass
|
|
return [], [], []
|
|
|
|
|
|
def _post_workspace_parts(agent: Any) -> List[str]:
|
|
"""Blocks that follow the worktree-specific context: environment probe
|
|
(config.yaml agent.environment_probe; one line, nothing when clean, skipped
|
|
for remote backends), bot-mode protocol, profile line, platform hint."""
|
|
parts: List[str] = []
|
|
if getattr(agent, "_environment_probe", True):
|
|
try:
|
|
from tools.env_probe import get_environment_probe_line
|
|
parts.append(get_environment_probe_line())
|
|
except Exception:
|
|
pass # Probe failure must never block prompt build.
|
|
if getattr(agent, "_bot_mode_protocol", True):
|
|
parts.extend(_bot_mode_parts(agent))
|
|
parts += [_active_profile_line(agent), platform_hint(agent)]
|
|
return parts
|
|
|
|
|
|
def _context_files_part(agent: Any, ctx_len: Optional[int], soul_loaded: bool) -> List[str]:
|
|
"""Project context files (AGENTS.md etc.) for the context tier. TERMINAL_CWD
|
|
when set (gateway); None lets discovery fall back to the launch dir. The
|
|
install-tree fallback is only legitimate for cli/tui where the launch dir
|
|
IS the user's shell cwd; desktop-pinned launch dirs are treated as the
|
|
fallback they really are so the guard can reject Hermes's bundled AGENTS.md."""
|
|
if agent.skip_context_files:
|
|
return []
|
|
launch_artifact = getattr(agent, "_context_cwd_is_launch_artifact", False)
|
|
return [_pb.build_context_files_prompt(
|
|
cwd=None if launch_artifact else resolve_context_cwd(), skip_soul=soul_loaded, context_length=ctx_len,
|
|
allow_install_tree_fallback=agent.platform in ("cli", "tui"), home_override=_agent_home(agent))]
|
|
|
|
|
|
def _join_tier(parts: List[Optional[str]]) -> str:
|
|
"""Join non-empty parts; None/blank entries are dropped."""
|
|
return "\n\n".join(p.strip() for p in parts if p and p.strip())
|
|
|
|
|
|
def build_system_prompt_parts(agent: Any, system_message: Optional[str] = None) -> Dict[str, str]:
|
|
"""Assemble the system prompt as three ordered cache tiers: ``stable`` (identity,
|
|
guidance and the coding brief), ``context`` (caller ``system_message``, project
|
|
context files, workspace snapshot and remaining workspace guidance) and
|
|
``volatile`` (skills index, memory, user profile, external memory block,
|
|
timestamp line, runtime environment hints). Worktree-dependent blocks follow project context so a
|
|
shared context file can remain in the longest common prefix across worktrees.
|
|
Never re-rendered mid-session."""
|
|
# Model context window scales the context-file caps; stable per conversation.
|
|
_cc_len = getattr(getattr(agent, "context_compressor", None), "context_length", None)
|
|
_ctx_len = _cc_len if isinstance(_cc_len, int) and _cc_len > 0 else None
|
|
# ── Stable tier ────────────────────────────────────────────────
|
|
stable_parts, _soul_loaded = _identity_parts(agent, _ctx_len)
|
|
# The skill_view() pointer dangles without skill tools OR without the
|
|
# hermes-agent skill installed, so the variant is chosen after the skills
|
|
# index is built; this slot holds its position.
|
|
_help_guidance_slot = len(stable_parts)
|
|
stable_parts.append(HERMES_AGENT_HELP_GUIDANCE_NO_SKILLS)
|
|
stable_parts.extend(_guidance_parts(agent))
|
|
skills_prompt = _skills_prompt(agent)
|
|
# Skill-pointer variant requires BOTH skill_view AND the hermes-agent skill
|
|
# in the rendered index (pure string check — inherits the index's stability).
|
|
if "skill_view" in (agent.valid_tool_names or set()) and "- hermes-agent:" in skills_prompt:
|
|
stable_parts[_help_guidance_slot] = HERMES_AGENT_HELP_GUIDANCE
|
|
stable_parts.extend(_alibaba_identity_part(agent))
|
|
# Pinned skills are per-agent constants (resolved once), so they live in the stable prefix.
|
|
stable_parts.extend(_auto_load_parts(agent))
|
|
# Coding posture: the operating brief stays in the stable prefix. The
|
|
# environment block contains the current cwd/backend and belongs after
|
|
# project context, not ahead of a large shared AGENTS.md block.
|
|
environment_hints = _pb.build_environment_hints()
|
|
coding_prefix_parts, coding_workspace_parts, coding_trailing_parts = _coding_parts(agent)
|
|
stable_parts.extend(coding_prefix_parts)
|
|
post_workspace_parts = _post_workspace_parts(agent)
|
|
# ── Context tier (project/worktree-dependent, may change between sessions) ──
|
|
context_parts: List[str] = []
|
|
# ephemeral_system_prompt is injected at API-call time only, never cached.
|
|
if system_message is not None:
|
|
context_parts.append(system_message)
|
|
context_parts.extend(_context_files_part(agent, _ctx_len, _soul_loaded))
|
|
if coding_workspace_parts:
|
|
context_parts.extend([*coding_workspace_parts, *coding_trailing_parts, *post_workspace_parts])
|
|
else:
|
|
# Preserve the stable placement for non-workspace sessions; there is no
|
|
# worktree snapshot whose later position would improve their prefix.
|
|
stable_parts.extend([*coding_trailing_parts, *post_workspace_parts])
|
|
# ── Volatile tier (most likely to differ on a rebuild; kept last so the stable prefix stays reusable) ──
|
|
# Skills are runtime-mutable, so the index leads the volatile band: on a longest-prefix
|
|
# backend an unchanged index stays inside the reused prefix; a changed one re-prefills from here.
|
|
volatile_parts: List[str] = [skills_prompt, *_memory_parts(agent)]
|
|
# Plugin sections are confined to one coarse anchor in the volatile tail so
|
|
# a resumed process can reconstruct the stable prefix without re-running plugins.
|
|
volatile_parts.extend(_plugin_section_blocks(_frozen_plugin_prompt_sections(agent), "after_memory"))
|
|
volatile_parts.append(_timestamp_line(agent))
|
|
# Keep the renderer-owned runtime anchor after all user/plugin prose so quoted
|
|
# host examples cannot shadow it during persisted-prompt validation.
|
|
if environment_hints:
|
|
# Embedder hints are prose too; reserve the delimiter for the renderer.
|
|
environment_hints = environment_hints.replace(_pb.RUNTIME_ENVIRONMENT_HEADING, "> " + _pb.RUNTIME_ENVIRONMENT_HEADING)
|
|
volatile_parts.append(f"{_pb.RUNTIME_ENVIRONMENT_HEADING}\n\n{environment_hints}\n\n{_pb.RUNTIME_ENVIRONMENT_END}")
|
|
return {"stable": _join_tier(stable_parts), "context": _join_tier(context_parts), "volatile": _join_tier(volatile_parts)}
|
|
|
|
|
|
def build_system_prompt(agent: Any, system_message: Optional[str] = None) -> str:
|
|
"""Assemble the full prompt; cached on ``agent._cached_system_prompt`` and
|
|
only rebuilt after compression. Tiers are ordered stable -> context ->
|
|
volatile so implicit longest-prefix caches keep the unchanged scaffold."""
|
|
parts = build_system_prompt_parts(agent, system_message=system_message)
|
|
agent._cached_system_prompt_static = parts["stable"]
|
|
# Surface context-file truncation warnings in chat, not only in logs.
|
|
for warning in drain_truncation_warnings():
|
|
agent._emit_diagnostic_status(warning)
|
|
return "\n\n".join(p for p in (parts["stable"], parts["context"], parts["volatile"]) if p)
|
|
|
|
|
|
def invalidate_system_prompt(agent: Any) -> None:
|
|
"""Force a rebuild on the next turn (after compression): reload memory from
|
|
disk and clear the frozen plugin snapshot (previous bytes stashed as the
|
|
fail-open fallback) so plugins re-render at the same boundary.
|
|
|
|
Called after context compression events. Also reloads memory from disk so the rebuilt prompt captures
|
|
any writes from this session, and clears the frozen plugin-section snapshot so plugins re-render at the
|
|
same boundary (maintainer-directed, #95681 arc): a plugin section is just another prompt block carrying
|
|
state — freezing it while memory, skills, and guidance refresh would recreate the stale-block disease
|
|
inside plugin-land. The previous bytes are stashed so a plugin whose render RAISES falls back to its
|
|
last good section instead of vanishing (fail-open guard, not a freeze).
|
|
"""
|
|
agent._cached_system_prompt = None
|
|
agent._cached_system_prompt_static = None
|
|
if hasattr(agent, "_plugin_system_prompt_sections_snapshot"):
|
|
agent._plugin_system_prompt_sections_previous = agent._plugin_system_prompt_sections_snapshot
|
|
del agent._plugin_system_prompt_sections_snapshot
|
|
if agent._memory_store:
|
|
agent._memory_store.load_from_disk()
|
|
|
|
|
|
def reconstruct_static_prefix(agent: Any, system_message: Optional[str] = None, *, log_label: str = "restore") -> None:
|
|
"""Reconstruct ``_cached_system_prompt_static`` for a stored prompt.
|
|
Only the full prompt is persisted, so restore / keep-prompt compression /
|
|
mid-turn failover to a cache-on provider must rebuild the stable tier to
|
|
regain the ``[static, volatile]`` layout. The rebuilt tier is used ONLY
|
|
when the stored prompt literally starts with it; otherwise static stays
|
|
None and the stored bytes are sent untouched. A failed rebuild is memoized
|
|
per stored prompt so the retry-loop hot path doesn't redo the file I/O."""
|
|
stored = getattr(agent, "_cached_system_prompt", None)
|
|
existing = getattr(agent, "_cached_system_prompt_static", None)
|
|
if (
|
|
not getattr(agent, "_use_prompt_caching", False)
|
|
or not isinstance(stored, str) or not stored
|
|
or (isinstance(existing, str) and existing and stored.startswith(existing))
|
|
or getattr(agent, "_static_rebuild_failed_for", None) == stored
|
|
):
|
|
return
|
|
try:
|
|
static = build_system_prompt_parts(agent, system_message=system_message)["stable"]
|
|
if static and stored.startswith(static):
|
|
agent._cached_system_prompt_static = static
|
|
agent._static_rebuild_failed_for = None
|
|
return
|
|
except Exception:
|
|
logger.debug("static system-prefix reconstruction failed on %s", log_label, exc_info=True)
|
|
agent._cached_system_prompt_static = None
|
|
agent._static_rebuild_failed_for = stored
|
|
|
|
|
|
def format_tools_for_system_message(agent: Any) -> str:
|
|
"""JSON tool definitions in the trajectory format."""
|
|
if not agent.tools:
|
|
return "[]"
|
|
return json.dumps([{"name": t["function"]["name"], "description": t["function"].get("description", ""),
|
|
"parameters": t["function"].get("parameters", {}),
|
|
"required": None} # Match the format in the example
|
|
for t in agent.tools], ensure_ascii=False)
|
|
|
|
|
|
__all__ = ["build_system_prompt_parts", "build_system_prompt", "invalidate_system_prompt",
|
|
"platform_hint", "restore_plugin_prompt_sections", "format_tools_for_system_message"]
|
|
|
|
|
|
# ---- BEGIN PLUGIN-COMPAT (revert-scheduled; see COMPAT_MANIFEST.md) ----
|
|
# Names external plugins imported from this module before the Sep 2026 decomposition.
|
|
# Internal code MUST NOT use these (scripts/check_compat_pointers.py fails CI if it does).
|
|
# The whole block is removed by reverting the commit that added it.
|
|
|
|
|
|
_PLUGIN_COMPAT_LAZY = {
|
|
'OPENAI_MODEL_EXECUTION_GUIDANCE': ('agent.prompt_builder', 'OPENAI_MODEL_EXECUTION_GUIDANCE'),
|
|
}
|
|
|
|
|
|
def __getattr__(name): # PEP 562 — lazy so no import cycles
|
|
target = _PLUGIN_COMPAT_LAZY.get(name)
|
|
if target is None:
|
|
raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
|
|
import importlib
|
|
from hermes_cli.plugin_compat import warn_once
|
|
warn_once(__name__, name, *target)
|
|
return getattr(importlib.import_module(target[0]), target[1])
|
|
# ---- END PLUGIN-COMPAT ----
|