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feat: cron agents can suppress delivery with [SILENT] response

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Every cron job prompt now includes guidance that the agent can respond
with [SILENT] when it has nothing new or noteworthy to report. The
scheduler checks for this marker and skips delivery, while still saving
output to disk for audit. Failed jobs always deliver regardless.

This replaces the notify parameter approach from PR #1807 with a simpler
always-on design — the model is smart enough to decide when there's
nothing worth reporting without needing a per-job flag.
This commit is contained in:
Test
2026-03-17 16:06:49 -07:00
parent a71e3f4d98
commit d35d923c76
2 changed files with 120 additions and 3 deletions
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27
cron/scheduler.py
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@@ -37,6 +37,11 @@ sys.path.insert(0, str(Path(__file__).parent.parent))
from cron.jobs import get_due_jobs, mark_job_run, save_job_output
# Sentinel: when a cron agent has nothing new to report, it can start its
# response with this marker to suppress delivery. Output is still saved
# locally for audit.
SILENT_MARKER = "[SILENT]"
# Resolve Hermes home directory (respects HERMES_HOME override)
_hermes_home = Path(os.getenv("HERMES_HOME", Path.home() / ".hermes"))
@@ -180,6 +185,17 @@ def _build_job_prompt(job: dict) -> str:
"""Build the effective prompt for a cron job, optionally loading one or more skills first."""
prompt = job.get("prompt", "")
skills = job.get("skills")
# Always prepend [SILENT] guidance so the cron agent can suppress
# delivery when it has nothing new or noteworthy to report.
silent_hint = (
"[SYSTEM: If you have nothing new or noteworthy to report, respond "
"with exactly \"[SILENT]\" (optionally followed by a brief internal "
"note). This suppresses delivery to the user while still saving "
"output locally. Only use [SILENT] when there are genuinely no "
"changes worth reporting.]\n\n"
)
prompt = silent_hint + prompt
if skills is None:
legacy = job.get("skill")
skills = [legacy] if legacy else []
@@ -480,9 +496,16 @@ def tick(verbose: bool = True) -> int:
if verbose:
logger.info("Output saved to: %s", output_file)
# Deliver the final response to the origin/target chat
# Deliver the final response to the origin/target chat.
# If the agent responded with [SILENT], skip delivery (but
# output is already saved above). Failed jobs always deliver.
deliver_content = final_response if success else f"⚠️ Cron job '{job.get('name', job['id'])}' failed:\n{error}"
if deliver_content:
should_deliver = bool(deliver_content)
if should_deliver and success and deliver_content.strip().upper().startswith(SILENT_MARKER):
logger.info("Job '%s': agent returned %s — skipping delivery", job["id"], SILENT_MARKER)
should_deliver = False
if should_deliver:
try:
_deliver_result(job, deliver_content)
except Exception as de: