Sheetwrite v0.3.0 release tracker

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Goal

Ship Sheetwrite v0.3.0 as a visibly complete, measurable spreadsheet, data-grid, and multi-sheet workbook release: stronger semantic and workbook behavior, broader portable formulas, faster real interactions, honest compatibility evidence, and eight production-quality interactive showcases.

Grid and framework contracts

• Execute DOM cell renderers with bounded retained-node lifecycle and absolute ARIA indices
• Expose generation-safe mutation, renderer fallback, datasource, and export failure callbacks across React, Vue, and Svelte
• Add an explicit semantic data-grid mode with semantic headers and host-owned editors
• Make wide-sheet active-cell navigation and shared presence labels remain visible and legible
• Add a stable, framework-neutral row-model bridge
• Publish executable onboarding and member-level API guidance

Formula and workbook behavior

• Add standard operator precedence for exponentiation, concatenation, postfix percent, and dynamic-array spill behavior
• Expand the portable analytical, financial, date/time, lookup, text, and array-function kernel
• Complete worksheet create/rename/reorder/duplicate/hide/delete behavior and accessible tab UX
• Make workbook import/export compatibility claims executable against a typed behavior matrix
• Normalize public async failure envelopes and recovery behavior
• Add canonical workbook tables with stable table/column IDs, structured-reference evaluation, structural rewrites, history/rebase, and native bounded OOXML table parts
• Add host-safe HTTPS/mailto and internal hyperlinks with bounded metadata, host-owned activation, and native OOXML relationships
• Add dependency-scoped conditional formatting with ordered precedence, stop-if-true, Worker parity, a 32-rule bound, and native OOXML subset support
• Generate the source/provenance-checked protocol-1 compatibility test set: 2,000 formula vectors, 250 mutation sequences, and 100 workbook scenarios (2,350 total; SHA-256 bdf94c76df81ea1fa2e1bf96a557c41b21a0f11ea11ae612fcccc35157d7275a)
• Run Sheetwrite/LibreOffice and supported cross-producer workbook round-trip chains with normalized semantic diffs and exact warnings
• Publish protocol-backed public compatibility test set results

Scale and performance

• Add bounded directional datasource prefetch without fabricating unloaded values
• Replace row-scale inverse lookup objects with a packed representation
• Separate sparse dirty edits from paged storage when the measured memory gate admits it
• Attribute startup, scroll, ingest, edit, and persistence costs by owner before optimizing
• Deliver measured interaction improvements on real Grid journeys, with exact before/after artifacts
• Attempt the exact 1,000,000-row × 1,000-column logical-cell architecture gate with a dedicated 1K-column spike; keep the feature only if startup, memory, correctness, and interaction ceilings pass

Product experience and release

• Introduce the v0.3 visual system without eager engine initialization or invented performance claims
• Add an inspectable live engine-dataflow view using real public instrumentation
• Overhaul the showcase hub and all eight live interactive showcases while preserving their existing behavior
• Expose tables, hyperlinks, conditional formatting, and protocol-backed conformance evidence in the interoperability showcase with real Grid behavior
• Converge documentation on shipped behavior and executable evidence
• Restore every unchanged delivery-size ceiling; no ceiling was raised to absorb feature growth

[chh-ay]

v0.3.0 release gate passed in PR #28 merged into develop.

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Versioning and publication automation is still completing; reopening until the v0.3.1 publish workflow succeeds.

[chh-ay]

v0.3.1 release gate passed in PR #31 merged into develop.