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docs: collapse dperecated stack concept page#943

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AidanDelaney wants to merge 2 commits into
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feature/remove-stacks
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docs: collapse dperecated stack concept page#943
AidanDelaney wants to merge 2 commits into
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feature/remove-stacks

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The stack concept was deprecated in Platform API 0.12 and Buildpack API
0.10 in favour of standard OCI image constructs such as OS, architecture,
and distribution. Keeping a full tutorial here misleads app developers
into using an outdated workflow. The page is reduced to a deprecation
notice with forwarding links to the relevant migration guides and current
base-image concepts, and the title is updated to make the deprecation
unambiguous in the navigation. A note is also added calling out that
pack stack suggest is deprecated in favour of pack builder suggest.

@AidanDelaney AidanDelaney requested a review from a team as a code owner June 7, 2026 16:50
The stack concept was deprecated in Platform API 0.12 and Buildpack API
0.10 in favour of standard OCI image constructs such as OS, architecture,
and distribution. Keeping a full tutorial here misleads app developers
into using an outdated workflow. The page is reduced to a deprecation
notice with forwarding links to the relevant migration guides and current
base-image concepts, and the title is updated to make the deprecation
unambiguous in the navigation. A note is also added calling out that
`pack stack suggest` is deprecated in favour of `pack builder suggest`.

Signed-off-by: Aidan Delaney <aidan.delaney@gmail.com>
App developers reading the stack deprecation notice had nowhere to turn
for practical guidance on what to do differently. This adds a short
section explaining that builder selection is still the right starting
point, that run images now carry OS/arch/distro target data instead of
a stack ID, and how to use the --platform flag for multi-architecture
builds. The rebase behaviour change is also documented so developers
understand why a previously-working rebase might now fail.

Signed-off-by: Aidan Delaney <aidan.delaney@gmail.com>
@AidanDelaney AidanDelaney force-pushed the feature/remove-stacks branch from 83c0fa1 to 87d3362 Compare June 7, 2026 16:51
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