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Inject live datetime into system prompt per invocation with relative-time instruction

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daniel
2026-05-09 14:56:25 -05:00
parent c317d948b1
commit 3a49dadb69
1 changed files with 20 additions and 3 deletions
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23
agentclaw/app/agent_claw_main/prompt_builder.py
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@@ -1,5 +1,7 @@
import os import os
import boto3 import boto3
from datetime import datetime
from zoneinfo import ZoneInfo
from botocore.exceptions import ClientError from botocore.exceptions import ClientError
# Cache keyed by actor_id ('' = global/no user) # Cache keyed by actor_id ('' = global/no user)
@@ -9,9 +11,24 @@ _prompt_cache: dict[str, str] = {}
def build_system_prompt(user_context: str = '', actor_id: str = '') -> str: def build_system_prompt(user_context: str = '', actor_id: str = '') -> str:
"""Build system prompt from S3 workspace files + optional per-user context.""" """Build system prompt from S3 workspace files + optional per-user context."""
base = _get_base_prompt(actor_id) base = _get_base_prompt(actor_id)
# Dynamic block — injected fresh every call, never cached
chicago = ZoneInfo('America/Chicago')
now = datetime.now(chicago)
dt_str = now.strftime('%A %Y-%m-%d %H:%M:%S %Z')
time_block = (
f'## Current Time\n'
f'The current date and time is: {dt_str}\n\n'
f'When examining any other date or time value, calculate its distance from now '
f'(in seconds, minutes, hours, or days as appropriate) before drawing conclusions '
f'like "upcoming", "overdue", "recent", "just happened", or "a long time ago". '
f'Do this arithmetic explicitly — do not estimate or assume.'
)
parts = [base, time_block]
if user_context: if user_context:
return base + f'\n\n---\n\n## User\n{user_context}' parts.append(f'## User\n{user_context}')
return base return '\n\n---\n\n'.join(parts)
def _get_base_prompt(actor_id: str = '') -> str: def _get_base_prompt(actor_id: str = '') -> str:
@@ -58,7 +75,7 @@ def _get_base_prompt(actor_id: str = '') -> str:
except Exception as e: except Exception as e:
print(f'[prompt_builder] Failed to load {fname}: {e}') print(f'[prompt_builder] Failed to load {fname}: {e}')
parts.append('## Runtime\nRuntime: agent-claw | host=AgentCore | model=bedrock-claude-sonnet | channel=telegram\nCurrent date/time is provided by the system. Timezone: America/Chicago.') parts.append('## Runtime\nRuntime: agent-claw | host=AgentCore | model=bedrock-claude-sonnet | channel=telegram | timezone=America/Chicago')
result = '\n\n---\n\n'.join(parts) result = '\n\n---\n\n'.join(parts)
_prompt_cache[actor_id] = result _prompt_cache[actor_id] = result