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Artemis-Eapil/artemis/agents/operator/prompts.py
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# Copyright 2026 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import base64
import io
from pathlib import Path
from jinja2 import Environment, StrictUndefined, Template
from langchain_core.messages import HumanMessage, SystemMessage
from PIL import Image
from artemis.context import ArtemisContext
from artemis.graph.state import State
from artemis.tools.command_tool import (
_format_long_output_response,
_is_output_long,
)
from artemis.utils.logger import get_logger
from artemis.utils.notes import get_note_file_path
from artemis.utils.plan_grammar import parse_plan, render_plan_grammar_spec
logger = get_logger(__name__)
from artemis.agents.prompt_assembly import render_tool_enum, resolve_available
from artemis.mcp.action_specs import OPERATOR_SHELL_ORDER
# --- Assembled tool references -------------------------------------------------------
# The operator.json templates carry availability slots rendered by
# ``apply_operator_prompt_contract``: ``[[ tool_enum(...) ]]`` expands an ordered,
# backticked enumeration limited to the available tool set, and
# ``[% if "x" in available_tools %]...[% endif %]`` gates a self-contained teaching
# segment. An unavailable tool therefore leaves no trace in the prompt at all. The
# slot delimiters are square-bracketed so the standard ``{{ ... }}`` context
# variables (initial_goal, plan_and_history, plan_grammar, ...) pass through
# untouched for the later context render.
#
# The orderings below reproduce the historical prompt wording exactly; with the full
# tool set the rendered output is byte-identical to the pre-assembly literals. See
# artemis/agents/prompt_assembly.py for the assembly rationale.
_PRE_DECISION_HELPER_TOOLS = ("ask_explorer", "ask_diagnoser", "video_analyzer")
_PRE_DECISION_ADB_TOOLS = ("run_adb_command", "manage_task", "analyze_task_output")
_PRE_DECISION_MEMORY_TOOLS = ("read_note", "list_notes", "save_note", "recall_history")
_PRE_DECISION_ALL_TOOLS = (
_PRE_DECISION_HELPER_TOOLS + _PRE_DECISION_ADB_TOOLS + _PRE_DECISION_MEMORY_TOOLS
)
# The two device-action enumeration slots in operator.json (identical in both
# templates), in their historical orders. The physical order is the canonical
# manifest's shell-binding order; the turn-ending order is a prompt property.
_PHYSICAL_ACTIONS_ORDER = OPERATOR_SHELL_ORDER
_TURN_ENDING_ORDER = (
"click",
"swipe",
"input_text",
"long_press",
"press_key",
"manage_app",
"wait_for_delay",
)
#: Every tool name the operator prompt slots can reference. ``available_tools=None``
#: resolves to this set, preserving the historical output.
OPERATOR_PROMPT_TOOLSET: frozenset[str] = frozenset(
_PRE_DECISION_ALL_TOOLS + _PHYSICAL_ACTIONS_ORDER
)
#: Renders the availability slots in operator.json. Square-bracket delimiters keep
#: the standard ``{{ ... }}`` context placeholders inert during this phase.
_CONTRACT_ENV = Environment(
block_start_string="[%",
block_end_string="%]",
variable_start_string="[[",
variable_end_string="]]",
comment_start_string="[#",
comment_end_string="#]",
keep_trailing_newline=True,
undefined=StrictUndefined,
)
def apply_operator_prompt_contract(
prompt_template: str,
available_tools: frozenset[str] | None = None,
) -> str:
"""Renders a template's availability slots against the actually-available tools.
Args:
prompt_template: One of the raw operator.json templates.
available_tools: Tools that actually exist this run. ``None`` renders with the
full historical tool set, producing byte-identical output to the
pre-assembly contract. Unavailable tools disappear from every enumeration
slot, and instruction segments teaching them are removed wholesale.
"""
available = frozenset(resolve_available(available_tools, OPERATOR_PROMPT_TOOLSET))
def tool_enum(names, final_sep: str | None = None) -> str:
return render_tool_enum(tuple(names), available, final_sep=final_sep)
return _CONTRACT_ENV.from_string(prompt_template).render(
available_tools=available,
tool_enum=tool_enum,
pre_decision_tools=_PRE_DECISION_ALL_TOOLS,
helper_tools=_PRE_DECISION_HELPER_TOOLS,
adb_tools=_PRE_DECISION_ADB_TOOLS,
memory_tools=_PRE_DECISION_MEMORY_TOOLS,
physical_actions=_PHYSICAL_ACTIONS_ORDER,
turn_ending_actions=_TURN_ENDING_ORDER,
)
class PromptBuilder:
def __init__(self):
self.system_parts = []
self.human_parts = []
self.human_footer = None
def add_system_text(self, text: str):
self.system_parts.append(text)
def add_human_content(self, content: str | dict):
self.human_parts.append(content)
def set_human_footer(self, content: str):
self.human_footer = content
def build(self) -> list[SystemMessage | HumanMessage]:
system_content = "".join(self.system_parts)
human_content = []
for p in self.human_parts:
if isinstance(p, str):
human_content.append({"type": "text", "text": p})
else:
human_content.append(p)
if self.human_footer:
human_content.append({"type": "text", "text": self.human_footer})
return [
SystemMessage(content=system_content),
HumanMessage(content=human_content),
]
class PromptComponent:
async def __call__(self, builder: PromptBuilder, state: State, ctx: ArtemisContext, **kwargs):
raise NotImplementedError
def resolve_operator_prompt_tools(ctx: ArtemisContext) -> frozenset[str]:
"""The tool set the operator prompt may advertise for this run.
Extracted verbatim from the template component so the transcript static
prefix (M2) and the legacy per-turn render assemble against the identical
availability set.
"""
# video_analyzer is bound conditionally (graph.py gates it on
# video_recording_tools_enabled); the prompt must not advertise it when the
# tool is not actually available this run.
available = set(OPERATOR_PROMPT_TOOLSET)
setup = getattr(ctx, "execution_setup", None)
if not (setup and getattr(setup, "video_recording_tools_enabled", False)):
available.discard("video_analyzer")
# recall_history (M4) needs a DataEngine to search and is config-gated;
# the prompt must not advertise it when the tool is not bound this run.
if getattr(ctx, "data_engine", None) is None or not _recall_enabled():
available.discard("recall_history")
# Device actions the installed actuator backend does not implement disappear
# from the prompt in lockstep with their tool declarations.
actuator = getattr(ctx, "actuator", None)
if actuator is not None and callable(getattr(actuator, "capabilities", None)):
try:
from artemis.mcp.action_manifest import (
DEVICE_ACTIONS,
available_device_actions,
)
available -= DEVICE_ACTIONS - available_device_actions(actuator)
except Exception as e:
logger.warning(f"Failed to assemble prompt against actuator: {e}")
return frozenset(available)
def _operator_grammar_flags(ctx: ArtemisContext) -> tuple[bool, bool]:
"""(include_checks, verification_active) for the template render."""
setup = getattr(ctx, "execution_setup", None)
# Grammar spec assembly is a function of configuration: with both check
# gates disabled, the check-line grammar never enters any prompt.
include_checks = bool(setup and getattr(setup, "checks_enabled", False))
# The rejection/finding diagnosis trigger only exists while a mechanism
# that can produce rejections or findings is active.
verification_active = include_checks or bool(
setup and not getattr(setup, "disable_planner_validation", True)
)
return include_checks, verification_active
# --- M2 template split -----------------------------------------------------------
# The only volatile span of operator.json's main_template is the plan+history
# section below. The transcript path replaces it with a static pointer so the
# whole system message becomes a byte-stable S region; the legacy path renders
# the untouched template and stays byte-identical.
#: The volatile section of ``main_template`` (must occur exactly once).
PLAN_HISTORY_TEMPLATE_SECTION = "## Current Plan & Execution History\n{{ plan_and_history }}"
#: Static replacement used by the transcript S region.
PLAN_HISTORY_STATIC_POINTER = (
"## Current Plan & Execution History\n"
"Provided in the conversation that follows: earlier turns carry the raw"
" step-by-step execution history (a restored-history block precedes them"
" after a process restart), and each turn's observation message recites"
" the current task plan."
)
def render_transcript_static_system(
prompts: dict,
ctx: ArtemisContext,
state: State,
template_name: str = "main_template",
) -> str:
"""Render the transcript path's byte-stable static system prompt (S region).
Same template, same availability assembly, and the same render inputs as
the legacy path — except the volatile plan+history section is swapped for
a static pointer, so the output never changes across the session.
"""
prompt_template = prompts.get(template_name)
if not prompt_template:
raise KeyError(
"Failed to format prompt, template not found in operator prompts config."
)
if prompt_template.count(PLAN_HISTORY_TEMPLATE_SECTION) != 1:
# Hard dependency of the M2 split (redesign §9): without a clean
# section boundary the S region cannot be byte-stable.
raise ValueError(
"operator main_template no longer contains exactly one plan+history"
" section; the transcript static split cannot be applied."
)
static_template = prompt_template.replace(
PLAN_HISTORY_TEMPLATE_SECTION, PLAN_HISTORY_STATIC_POINTER
)
available = resolve_operator_prompt_tools(ctx)
static_template = apply_operator_prompt_contract(
static_template, available_tools=available
)
include_checks, verification_active = _operator_grammar_flags(ctx)
return Template(static_template).render(
initial_goal=state.initial_goal,
subgoals_status="",
plan_and_history="",
unified_history="",
plan_grammar=render_plan_grammar_spec(include_checks),
verification_active=verification_active,
)
class TemplatePromptComponent(PromptComponent):
async def __call__(self, builder: PromptBuilder, state: State, ctx: ArtemisContext, **kwargs):
prompts = kwargs.get("prompts", {})
template_name = kwargs.get("template_name", "main_template")
prompt_template = prompts.get(template_name)
if not prompt_template:
raise KeyError(
"Failed to format prompt, template not found in operator prompts config."
)
available = resolve_operator_prompt_tools(ctx)
prompt_template = apply_operator_prompt_contract(
prompt_template, available_tools=available
)
plan_and_history = kwargs.get("plan_and_history", "No plan or history yet.")
include_checks, verification_active = _operator_grammar_flags(ctx)
full_prompt = Template(prompt_template).render(
initial_goal=state.initial_goal,
subgoals_status="",
plan_and_history=plan_and_history,
unified_history="",
plan_grammar=render_plan_grammar_spec(include_checks),
verification_active=verification_active,
)
parts = full_prompt.split("# CURRENT OBSERVATION")
builder.add_system_text(parts[0] + "# CURRENT OBSERVATION\n")
if len(parts) > 1:
builder.set_human_footer(parts[1])
class ObservationPromptComponent(PromptComponent):
async def __call__(self, builder: PromptBuilder, state: State, ctx: ArtemisContext, **kwargs):
latest_screenshot_b64 = kwargs.get("latest_screenshot_b64")
minimal_list = kwargs.get("minimal_list")
builder.add_human_content("--- Current Screenshot ---")
builder.add_human_content(
{
"type": "image_url",
"image_url": {"url": f"data:image/jpeg;base64,{latest_screenshot_b64}"},
}
)
builder.add_human_content(f"--- Visible UI Elements ---\n{minimal_list}")
class PlanRecitationPromptComponent(PromptComponent):
"""Per-turn task-plan recitation for the transcript tail (M2).
With the plan+history section moved out of the (now static) system
message, every observation recites the live task plan; the scrub edge
strips the copies from older turns at depth 1.
"""
async def __call__(self, builder: PromptBuilder, state: State, ctx: ArtemisContext, **kwargs):
from artemis.memory.transcript import PLAN_RECITATION_MARKER
task_plan = kwargs.get("task_plan") or "No task plan yet."
builder.add_human_content(f"{PLAN_RECITATION_MARKER}\n{task_plan}")
class FeedbackPromptComponent(PromptComponent):
"""Append-only injection of source-tagged findings.
Reads ``state.operator_feedback`` (written by ``execution_check_node`` at
harvest / planner rejection and by exit settlement on a bounce-back).
Renders nothing when there are no findings — the prompt template itself
is never switched.
"""
async def __call__(self, builder: PromptBuilder, state: State, ctx: ArtemisContext, **kwargs):
findings = getattr(state, "operator_feedback", None)
if not findings:
return
lines = "\n".join(f"- {f}" for f in findings)
builder.add_human_content(
"--- Verification Findings ---\n"
f"{lines}\n"
"Each finding is tagged with its source. Checker verdicts"
" ([verify failed], [final check]) are independent judgments —"
" address any reverted subgoal accordingly; do not re-litigate"
" them. [planner] findings explain why a plan change was rejected"
" and rolled back — factor the reason into your next strategy."
)
class CheckItemsExplainerPromptComponent(PromptComponent):
"""Behavioral guidance for check lines, rendered iff the CURRENT plan
actually contains check lines (content-driven, not switch-driven: a resumed
plan carrying check lines still gets the explanation)."""
async def __call__(self, builder: PromptBuilder, state: State, ctx: ArtemisContext, **kwargs):
if not ctx or not getattr(ctx, "data_engine", None):
return
try:
task_plan_path = get_note_file_path(ctx.data_engine.base_dir, "task_plan")
if not task_plan_path.exists():
return
snapshot = parse_plan(task_plan_path.read_text(encoding="utf-8"))
except Exception as e:
logger.error(f"Failed to parse plan for check-items explainer: {e}")
return
if not snapshot.all_check_items:
return
builder.add_human_content(
"--- About the plan's check lines ---\n"
"The task plan declares `- verify:` / `- assert:` check lines."
" `verify:` lines are the acceptance criteria for their subgoal — use"
" them to confirm your work is complete, but the judgment is made by"
" an independent Checker: never declare a check passed yourself or"
" record conclusions on its behalf. `assert:` lines are test"
" assertions — take NO extra actions for them and never construct or"
" fake state to satisfy one; a failing assertion is a legitimate test"
" result. Check lines must not be deleted or reworded (deletions are"
" automatically restored by the system); keep them verbatim when"
" rewriting the plan — adding new ones is allowed. Simply mark"
" completions per the plan grammar as usual; checking runs"
" asynchronously in the background and does not block you."
)
class BackgroundTasksPromptComponent(PromptComponent):
async def __call__(self, builder: PromptBuilder, state: State, ctx: ArtemisContext, **kwargs):
active_tasks = kwargs.get("active_background_tasks", [])
if active_tasks:
lines = [
"--- Active Background ADB Tasks ---",
]
for task in active_tasks:
lines.append(
f"- TaskId: {task['task_id']}\n Command:"
f" `{task['command']}`\n Cwd: `{task['cwd']}`\n "
f" TerminalID: `{task['terminal_id']}`\n Accumulated"
f" Output: {task['output_line_count']} lines of logs"
)
builder.add_human_content("\n".join(lines) + "\n")
newly_finished_tasks = kwargs.get("newly_finished_tasks", [])
if newly_finished_tasks:
lines = [
"--- NEWLY FINISHED ADB TASKS (Since last step) ---",
]
for task in newly_finished_tasks:
task_id = task["task_id"]
command = task["command"]
status = task["status"]
output_text = task.get("output_text", "")
intro = f"- TaskId: {task_id}\n Command: `{command[:60]}...`\n Status: {status}"
if _is_output_long(output_text):
formatted = _format_long_output_response(task_id, output_text, intro)
# format_long_output_response is multi-line, let's indent it nicely
indented = "\n".join(f" {line}" for line in formatted.splitlines())
lines.append(indented)
else:
lines.append(f"{intro}\n Final Output:\n {output_text.strip()}")
builder.add_human_content("\n".join(lines) + "\n")
class TaskPlanWarningPromptComponent(PromptComponent):
async def __call__(self, builder: PromptBuilder, state: State, ctx: ArtemisContext, **kwargs):
steps = kwargs.get("steps", [])
if len(steps) >= 2:
last_two_steps = steps[-2:]
modified_in_last_two = False
for step in last_two_steps:
tool_calls = step.get("tool_calls", [])
for tc in tool_calls:
if tc.get("name") in [
"update_note",
"save_note",
"append_note",
]:
args = tc.get("args", {})
note_key = args.get("key") or args.get("name")
if note_key == "task_plan":
modified_in_last_two = True
break
if modified_in_last_two:
break
if not modified_in_last_two:
builder.add_human_content(
"\nReminder: You have not updated the task_plan for two"
" consecutive turns. Please check the latest progress,"
" reflect on whether the task planning is detailed enough,"
" and whether every pending item is listed as a subtask."
" Please update the completed tasks and pending tasks in"
" detail."
)
class ToolLimitWarningPromptComponent(PromptComponent):
async def __call__(self, builder: PromptBuilder, state: State, ctx: ArtemisContext, **kwargs):
if getattr(state, "operator_tool_limit_exceeded", False):
builder.add_human_content(
"\n Warning: You did not execute any screen interaction actions"
" in your last turn. Please re-examine the task goal and revise"
" your plan; your current approach may not be the correct path."
" Actively calling ask_diagnoser can help you diagnose the"
" issue."
)
class InjectedInstructionPromptComponent(PromptComponent):
async def __call__(self, builder: PromptBuilder, state: State, ctx: ArtemisContext, **kwargs):
injected = getattr(state, "injected_instruction", None)
if injected:
builder.add_human_content(
f"\n--- User Guidance ---\n"
f"The user observing your progress has provided the following"
f" feedback or correction:\n"
f'"{injected}"\n\n'
f"Please review this guidance, evaluate it against your current"
f" screen state and recent history, "
f"and integrate it into your reasoning. Use it to refine your"
f" task plan and determine the "
f"most appropriate next action."
)
class ScreenshotSimilarityPromptComponent(PromptComponent):
"""Background check: compare current screen against post-action screenshots of the last few steps.
Inject a note if any are identical. This helps detect if the same screen
keeps reappearing unexpectedly.
"""
NUM_STEPS_BACK: int = 3
MAX_ALLOWED_DIFF_PIXELS: int = 3
COLOR_TOLERANCE: int = 8
async def __call__(self, builder: PromptBuilder, state: State, ctx: ArtemisContext, **kwargs):
if not ctx or not ctx.data_engine:
return
latest_screenshot_b64 = kwargs.get("latest_screenshot_b64")
steps = kwargs.get("steps") or []
if not latest_screenshot_b64 or not steps:
return
# 1. Load current live image and re-encode to JPEG for symmetric compression matching
try:
# Strip data URI header if present
if "," in latest_screenshot_b64:
latest_screenshot_b64 = latest_screenshot_b64.split(",", 1)[1]
curr_img_bytes = base64.b64decode(latest_screenshot_b64)
raw_img = Image.open(io.BytesIO(curr_img_bytes)).convert("RGB")
# Symmetric in-memory re-encoding to match JPEG compression artifacts
jpeg_buf = io.BytesIO()
raw_img.save(jpeg_buf, format="JPEG", quality=75)
jpeg_buf.seek(0)
curr_img = Image.open(jpeg_buf).convert("RGB")
except Exception:
return
# 2. Get last steps with a recorded post_image_name or pre_image_name
history_steps = [s for s in steps if s.get("post_image_name") or s.get("pre_image_name")]
recent_steps = history_steps[-self.NUM_STEPS_BACK :]
matched_step_nums = []
images_dir = Path(ctx.data_engine.global_base_dir) / "images"
# 3. Compare current image with each past step's post-action screenshot
for step_rec in recent_steps:
step_num = step_rec.get("step_number")
if step_num is None:
continue
image_name = step_rec.get("post_image_name") or step_rec.get("pre_image_name")
if not image_name:
image_name = step_rec.get("post_image_name")
if not image_name:
continue
image_path = images_dir / f"{image_name}.jpg"
if not image_path.exists():
continue
try:
past_img = Image.open(image_path).convert("RGB")
# Must be same dimensions to compare pixel-by-pixel
if curr_img.size != past_img.size:
continue
# Count differing pixels
diff_count = self._count_differing_pixels(
curr_img, past_img, max_allowed=self.MAX_ALLOWED_DIFF_PIXELS
)
if diff_count <= self.MAX_ALLOWED_DIFF_PIXELS:
matched_step_nums.append(str(step_num))
except Exception:
continue
# 4. Inject note if any identical screenshots are found
if matched_step_nums:
steps_str = ", ".join(matched_step_nums)
note_text = (
f"Note: Screenshot in step {steps_str} seem to be identical to"
" current screen. This could be intended since not all actions"
" alter screens."
)
builder.add_human_content(note_text)
def _count_differing_pixels(
self,
img1: Image.Image,
img2: Image.Image,
max_allowed: int | None = None,
) -> int:
"""Count pixels that differ between two RGB images.
Early-exits if diff_count exceeds max_allowed for performance.
"""
if max_allowed is None:
max_allowed = self.MAX_ALLOWED_DIFF_PIXELS
data1 = img1.getdata()
data2 = img2.getdata()
diff_count = 0
tolerance = self.COLOR_TOLERANCE
for p1, p2 in zip(data1, data2):
if (
abs(p1[0] - p2[0]) > tolerance
or abs(p1[1] - p2[1]) > tolerance
or abs(p1[2] - p2[2]) > tolerance
):
diff_count += 1
if diff_count > max_allowed:
break
return diff_count
def _recall_enabled() -> bool:
"""Whether the recall_history tool is enabled by configuration (M4)."""
try:
from artemis.config import load_agent_config
return bool(load_agent_config().memory.recall.enabled)
except Exception:
return True
class HistoricalStateHintPromptComponent(PromptComponent):
"""Local historical-state hint from stored perceptual hashes (M4).
Compares the current screenshot's dHash against the post-action hashes
stamped on every recorded step (``extra_metadata["post_image_dhash"]``,
including steps already chunk-compressed out of the visible transcript) —
an O(n) integer scan, no model call, no historical image bytes. On a
close match to a step *older* than the recent window it injects a one-line
hint pointing at ``recall_history``.
Division of labor with :class:`ScreenshotSimilarityPromptComponent`: that
component's pixel-exact 3-step look-back covers "stuck on the same
screen"; this one covers "returned to a much earlier state". When any of
the last :attr:`RECENT_SILENT_STEPS` steps also matches, this hint stays
silent so the two never fire on the same regime.
"""
#: Matches within this many most-recent steps stay silent (the pixel
#: same-screen note owns that window).
RECENT_SILENT_STEPS: int = 3
#: Upper bound on how many historical steps are scanned (most recent first).
SCAN_CAP: int = 500
async def __call__(self, builder: PromptBuilder, state: State, ctx: ArtemisContext, **kwargs):
latest_screenshot_b64 = kwargs.get("latest_screenshot_b64")
steps = kwargs.get("steps") or []
if not latest_screenshot_b64 or len(steps) <= self.RECENT_SILENT_STEPS:
return
max_distance = 8
try:
from artemis.config import load_agent_config
transcript_cfg = load_agent_config().memory.transcript
if not getattr(transcript_cfg, "similarity_hint", True):
return
max_distance = int(getattr(transcript_cfg, "similarity_max_distance", 8))
except Exception:
pass
try:
from artemis.utils.image_hash import dhash_hex, hamming_distance_hex
if "," in latest_screenshot_b64:
latest_screenshot_b64 = latest_screenshot_b64.split(",", 1)[1]
current_hash = dhash_hex(base64.b64decode(latest_screenshot_b64))
except Exception:
return
if not current_hash:
return
def _step_hash(step: dict) -> str | None:
meta = step.get("extra_metadata") or {}
return meta.get("post_image_dhash") or meta.get("pre_image_dhash")
# Silence rule first: a close match inside the recent window belongs
# to the pixel-level same-screen note, not this hint.
for step in steps[-self.RECENT_SILENT_STEPS :]:
distance = hamming_distance_hex(current_hash, _step_hash(step))
if distance is not None and distance <= max_distance:
return
older_steps = steps[: -self.RECENT_SILENT_STEPS][-self.SCAN_CAP :]
best_step_number = None
best_distance = None
for step in older_steps:
distance = hamming_distance_hex(current_hash, _step_hash(step))
if distance is None or distance > max_distance:
continue
if best_distance is None or distance <= best_distance:
# <= keeps the most recent step on ties.
best_distance = distance
best_step_number = step.get("step_number")
if best_step_number is not None:
builder.add_human_content(
f"Historical state hint: current screen closely resembles the"
f" post-action screen from Step {best_step_number}. Use"
" recall_history only if its details are needed."
)
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