See the Slack Left on Every Library Hold — Free
Holds expire quietly on different branch windows. Subtract the days a hold has waited from its own pickup window and see which family errand is already overdue.
The proof surface
Document renewal boards track expiry dates you own. This tracks shelves you do not: each branch’s pickup window minus the days already elapsed, with a reminder lead you set.
Why the flat version breaks
Assuming one window fits all branches
Each branch sets its own shelf time.
Counting from the request date
The clock starts when the hold is ready.
Letting the summary hide a negative
The worst row is the one to act on first.
How to work the hold shelf timer
Windows differ by branch and can change; enter the days the library actually gave each hold. The novel has fourteen days and has waited two, leaving twelve.
Use the ready date from the notification. The picture book waited eight of ten days — two left, at or inside the three-day reminder lead, so it is flagged for this week’s run.
The biography waited ten days on a seven-day window: minus three. The summary reports the smallest slack across holds, so the worst shelf leads the list. Confirm with the library whether an expired hold can be renewed or must be re-requested.
If you shop on Saturdays, a three-day lead means Wednesday’s warning still makes the trip. The tool does not know your calendar; the lead is the knob that fits it.
What the hold shelf timer replaces
| Question | Before | Visible working |
|---|---|---|
| Assuming one window fits all branches | Each branch sets its own shelf time. | Count the days honestly |
| Counting from the request date | The clock starts when the hold is ready. | Treat negative slack as overdue |
| Letting the summary hide a negative | The worst row is the one to act on first. | Set the lead to your real routine |
A local arithmetic aid replaces hand calculation, not expert review. No paid AI service is needed.
Run it on the samples, right here
FIRST-LOAD
Input is processed locally and a draft is saved automatically in this browser profile when storage is available. Reset to sample clears that draft; Pro history has its own clear button. A state link encodes your inputs in its URL: share only non-sensitive rows. Browser history, clipboard and anyone receiving the link may retain it. Optional AI use below leaves this device; it is not required.
Countdown arithmetic on notices you read yourself. Not connected to any library system; renewal rules and hold policies belong to the branch.
Data note: Everything runs in this browser tab on the hold shelf timer: your hold | days since ready | branch pickup window days stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.
Go deeper: the companion app files the same reading as a punched ticket stubs
The article demo above runs without limits. The companion app keeps a local history, exports the rows as CSV, prints the hold shelf timer reading, and holds your drafts on this device — one free run, then $ 4 one-time for the layer that keeps filing.
The hold shelf timer reading is complete for free. The optional $4 layer adds print, row CSV and the last five local reading summaries; it does not add hidden answers. Checkout is not configured yet; the article demo remains unlimited.
Open the see the slack left on every library hold companionBoundary
Countdown arithmetic on notices you read yourself. Not connected to any library system; renewal rules and hold policies belong to the branch.
What this is built on
- Method: The biography waited ten days on a seven-day window: minus three. The summary reports the smallest slack across holds, so the worst shelf leads the list. Confirm with the library whether an expired hold can be renewed or must be re-requested.
- All sample records are invented examples. The app does not fetch measurements, policies, files or personal records.
- Google’s official pricing page, fetched 2026-09-28, lists free-tier access including AI Studio. Optional formatting only; limits and availability can change. Free-tier content may be used to improve products. Never paste private records there.
Before: Each branch sets its own shelf time. After: the hold shelf timer shows the working beside each named row so the reader can change the assumption and inspect the consequence.
Optional AI formatting, not calculation
For this hold shelf timer, use the free AI Studio interface only if available to you, with no paid API key. Manual entry completes the same workflow for free. Supply only fictional or non-sensitive notes. Review its output against the source; never paste unresolved questions into the numeric rows.
Format my non-sensitive notes for a hold shelf timer. Return plain rows only: hold | days since ready | branch pickup window days. Preserve supplied quantities exactly. Do not guess missing values; list questions separately. Do not calculate or add advice. I will check every row before pasting into the local tool.
Accepted schema: hold | days since ready | branch pickup window days. No AI response is executed as code.