perf(release): cache cargo build with Swatinem/rust-cache#4
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…che) Adds Swatinem/rust-cache@v2.9.1 to all 3 build jobs (linux, macos, windows) right after dtolnay/rust-toolchain. First run still cold but subsequent runs restore the cargo registry, git deps, and target/ so incremental builds drop from 30-75 min to typically 5-15 min per job. Cache key includes matrix.target so each (target, toolchain) pair gets its own cache entry. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
Adds
Swatinem/rust-cache@v2.9.1to all 3 build jobs (build-linux,build-macos,build-windows) right afterdtolnay/rust-toolchain.Cache key includes
matrix.targetso each (target, toolchain) pair gets its own entry.Why
First dry-run (`agentx-v0.128.0-agentx.0`) cold-built every workspace member and took:
Subsequent runs with this cache should drop the cold-build portion to typically 5–15 min per Linux/Windows job. macOS is bottlenecked by signing/notarization regardless.
Test plan
🤖 Generated with Claude Code