* ci: migrate remaining pinned actions to node24
actions/cache@v4 and mlugg/setup-zig@v2.2.1 still target Node 20, which
GitHub removes from runners on 2026-09-23. Bump actions/cache to v6.1.0 and
replace mlugg/setup-zig with vercel-labs/setup-zig@v1.0.2.
vercel-labs/setup-zig takes only `version`, so the use-cache/cache-size-limit
tuning and Zig global-cache reuse are dropped. See the PR for alternatives.
* ci: restore zig caching for vercel setup-zig
vercel-labs/setup-zig has no cache controls, so redirect the Zig global cache
into the workspace .zig-cache and run the Zig build cache step on Linux too.
Drop this commit if we switch to a setup action that owns Zig caching, e.g.
step-security/setup-zig or xyzzylabs/setup-zig.
* ci: retain zig build caches across validation runs
* ci: reduce debug information in validation builds
* ci: build only the ghostty test target for scalar checks
* ci: measure debug profiles and remove duplicate macos caching
* ci: compare scalar build scopes on one runner
* ci: keep the zig compiler path stable across runs
* ci: run macos and windows lint alongside tests
* ci: inspect remaining zig cache misses
* ci: remove completed measurement probes
* ci: compare windows linkers without changing release builds
* ci: test linux incremental reuse and correct the linker probe
* ci: measure windows incremental state reuse
* test: verify incremental reuse after a source change
* ci: finalize measured compiler cache optimizations
* fix: run the full applicable test suite on windows
* test: remove redundant test shell assignment
* test: make endpoint and metadata fixtures deterministic
* test: tolerate exited servers during windows probe cleanup
Ogulcan Celik
JJ Liebig
kangal-bot
Patrick XinandCan Celik