Smartsheet

Promptfree, for everyone, and the only version there is

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Do not rebuild Smartsheet. Build the one grid your team actually uses, with dependencies done properly.

WHAT TO BUILD
- Astro with a Node adapter, SQLite, server-rendered
- One project, many tasks, no cross-project resource planning

THE SCHEDULE
- A task has a duration in working days, an optional start, and a list of predecessors
- Support finish-to-start dependencies with a lag; document that the other three types are not implemented
- Compute the schedule with a topological sort, and refuse a cycle with the path that caused it named

WORKING TIME
- A calendar of working days and holidays in one config file
- All arithmetic in whole days in a single timezone; do not attempt hourly resourcing

THE VIEW
- A table on the left, a bar chart on the right, drawn as inline SVG at a fixed day width
- The critical path highlighted, computed as the longest zero-slack chain
- Print stylesheet, because this is the artefact that gets printed

CHANGES
- Every field change appended to a revision table with who and when
- A baseline snapshot that can be captured and compared against, showing slippage per task

WHAT IS OUT OF SCOPE, SAY SO IN THE README
- Approvals, forms, resource levelling and SSO

Include a README on the working calendar, the critical path definition used, and how to export to CSV.