presenton

The error occurs because get_messages_for_slides_markdown() passes with_schema=True to PresentationLayoutModel.to_string(), which does not accept that argument. Immediate workaround: edit servers/fastapi/templates/presentation_layout.py and change the method signature to def to_string(self, with_schema: bool = False) -> str:. This suppresses the crash and allows slide generation. Alternatively, remove with_schema=True from the call in generate_presentation_structure.py line 129. A permanent fix should either implement schema output or align the calls.

Upgrade to the latest version of Presenton. Recent releases automatically refresh slides after tool actions, stream chat status, highlight the edited slide with follow mode, and include a thumbnail panel to select slides. No manual reload required.

This happens because the app is not notarized by Apple. To bypass Gatekeeper, install the app from the .dmg (drag to Applications). Then, in Finder → Applications, right-click (or Control-click) the app and select Open. Confirm Open in the dialog. You only need to do this once; subsequent launches work normally. Alternatively, go to System Settings → Privacy & Security and click 'Open Anyway'.

This is a self-comparison diff bug in _apply_operations() (services/operation_executor.py). The executor mutates the same ORM SlideModel instances that current_slides references, so the post-apply diff compares each slide object to itself and always yields changedSlideIds: [] — even though the mutation applied correctly (revision bumps, DB and snapshot updated). Structural ops (insert/duplicate/move) are unaffected because they change slide ids/count. Fix: snapshot the baseline slide values BEFORE applying operations, then diff staged slides against the snapshot instead of re-reading the mutated ORM objects:

current = document_snapshot(presentation, current_slides)
baseline_slide_values = {str(slide.id): _slide_value(slide) for slide in current_slides}
# ... apply operations to staged_slides ...
changed_slide_ids = [
    slide_id for slide_id in desired_slide_ids
    if slide_id in existing_slide_ids
    and _slide_value(next(s for s in staged_slides if str(s.id) == slide_id))
    != baseline_slide_values.get(slide_id)
]

After the fix, in-place mutations (e.g. UpdateSlide setting speaker_note) correctly return the mutated slide's id in both the operation result and the persisted receipt. Verified fix is available in PR #913 (branch audit/r0-persistence-executor).

Presenton (v0.9.11-beta) returns tz-naive timestamps like 2026-09-25T14:02:03.123456 from get_job_status and template list endpoints because SQLite does not preserve timezone info despite DateTime(timezone=True) columns, so strict MCP clients fail validation against the declared format: date-time schema. Fix: add a UTC-aware field serializer to both AsyncTaskModel (servers/fastapi/models/sql/async_task.py) and TemplateListItem (servers/fastapi/api/v1/ppt/endpoints/template.py):

from datetime import datetime, timezone
from pydantic import field_serializer

@field_serializer("created_at", "updated_at")
def _serialize_timestamps(self, value: datetime | str) -> str:
    if isinstance(value, str):
        return value
    if value.tzinfo is None:
        value = value.replace(tzinfo=timezone.utc)
    return value.isoformat()

This makes timestamps RFC3339-compliant (e.g. 2026-09-25T14:02:03.123456+00:00) and fixes both REST/OpenAPI and MCP tool output in one place.