Canton devkit (dpm component) - a unified toolkit for Canton app development (LocalNet, dar helpers, etc) #18 Milestone 5: Optional Maintenance & Compatibility Extension

(Optional)Milestone 5 ### Optional Maintenance & Compatibility Extension

An additional 600,000 CC is proposed as a separate optional extension covering 12 months of post-grant maintenance and Splice upgrade support after completion of the base proposal.

If approved, this optional extension would cover:

• Maintaining a documented compatibility matrix for supported Splice releases and platforms, consistent with the support-window / best-effort policy described under Splice Version Compatibility.
• Running smoke tests against newer Splice releases and publishing compatibility notes.
• Shipping patch releases for compatibility fixes and high-priority user-reported bugs.
• Ongoing incorporation of external feedback into maintenance releases.

This optional extension is not included in the 1,900,000 CC base proposal total above. If approved in addition to the base proposal, the combined total would be 2,500,000 CC.

Funding is requested in Canton Coin, consistent with the Development Fund's CC‑denominated, milestone‑based grants model under CIP‑100.

| Milestone | Target deadline | Funding Request | | :--- | :--- | :--- | | (Optional)Milestone 5 (Optional Maintenance & Compatibility Extension) | N/A | An additional 600,000 CC is proposed as a separate optional extension covering 12 months of post-grant maintenance and Splice upgrade support after completion of the base proposal.|

_Originally posted by @pedrodneves in https://github.com/canton-foundation/canton-dev-fund/issues/18#issuecomment-4571632357_