Plan an errand with travel time and an arrival message

Why use this

1. An errand can consume more calendar time than its appointment suggests, especially when pickup instructions, travel buffers and the other person's expectations are maintained separately. A changed departure time can leave an arrival message inconsistent with the owner's actual plan.

2. A coordinated preview could show the travel block, pickup reminder and recipient message together. The owner could correct the address and timing once, then authorize only the calendar and communication changes that fit the errand.

Why an agent / simpler alternative

Useful judgment

Reconcile errand details with surrounding commitments and notice when an ETA message overstates timing certainty.

Simpler alternative

Use a navigation app and one manual reminder for an isolated errand with no coordination needs.

Unsuitable when

The address or recipient is ambiguous, or the task requires live location sharing without permission.

Proposed inputs

1. Name

   Errand brief

   Owner

   Requester

   Minimum scope

   Purpose, verified destination, pickup window and required items

   Quality check

   Resolve similarly named places before planning.

2. Name

   Scheduling and recipient context

   Owner

   Requester

   Minimum scope

   Relevant calendar window and named message recipient

   Quality check

   Separate travel assumptions from confirmed availability.

Access and setup — proposed or unknown

Proposed minimum

1. Supplied fictional schedule and address labels with a local change preview.

Compatibility unknowns

1. Unknown: current runtime, routing estimates, calendar writes and messaging delivery.

External actions requiring approval

1. Calendar changes, exact message recipient and content, and location disclosure to external services.

Expected deliverable and review checks

Proposed artifact

Errand plan containing proposed travel block, pickup reminder and ETA-message preview.

Critical checks

1. The plan accounts for surrounding calendar commitments and pickup hours.

2. The message shares only necessary timing information with the intended person.

Missing output evidence

No new workflow run or output inspection is performed for this editorial layer. The linked implementation evidence retains the original source-specific outcome and artifact limits.

Failure signals and proposed responses

1. Signal

   Travel time overlaps another fixed commitment.

   Why it matters

   The errand may be impossible within the proposed window.

   Proposed response

   Flag the conflict and ask the owner which commitment can move.

2. Signal

   The recipient name matches more than one contact.

   Why it matters

   An arrival notice could disclose location to the wrong person.

   Proposed response

   Hold the message preview until the owner identifies the exact recipient.

Effort and cost — unknown

Setup work

1. Verify destination, pickup constraints and recipient identity.

Ongoing review

1. Reconcile changed departure times and approved schedule edits.

Unknowns

1. Unknown: routing freshness, traffic variation and notification reliability.

First check — proposed, unexecuted

Status

proposed_unexecuted

Synthetic fixture

A fictional pickup window conflicts with a fixed appointment, and two mock contacts share the intended recipient's name.

Acceptance checks

1. Flag the time conflict.

2. Leave the recipient unresolved and produce no send-ready action.

Stop conditions

1. Real calendars, locations, contact records or external messages are needed.

Limits

1. An errand plan does not establish ongoing messaging permission or a verified arrival time.