What's Changed

build:

• record compiler hash in build fingerprints by @cpunion in #1516
• fix: ensure dev/llgo.sh always rebuilds with -tags=dev by @xgopilot[bot] in #1519
• fix(build): ensure linker always consumes .a archives by @cpunion in #1526
• chore: skip nondeterministic goroutine run result test by @xgopilot[bot] in #1564

compiler:

• cl: fix method thunk name collision causing incorrect type assertions by @xgopilot[bot] in #1522
• test(cl): add run result output verification by @luoliwoshang in #1545
• fix(cl):same float-to-int cast overflow behavior with go by @luoliwoshang in #1544
• fix(cl): fill cross-package unexported method Ifn/Tfn so itab is complete by @luoliwoshang in #1560

llgo/ssa:

• fix: handle untyped shift expressions in SSA build by @cpunion in #1531
• ssa: type assert closure use MatchesClosure func by @visualfc in #1535

runtime:

• runtime: clean code, impl reflect arrayOf, chanOf, structOf by @visualfc in #1515
• runtime/internal/clite/syscall: remove deps errors by @visualfc in #1543
• runtime: align pointer print formatting by @luoliwoshang in #1558
• fix(runtime): make NewItab tolerate unreachable IFn entries by @luoliwoshang in #1576

libraries:

• support os.File.WriteString by @luoliwoshang in #1554
• Implement missing os.File methods by @xgopilot[bot] in #1553

emb:

• chore: remove duplicate paths in getNewlibESP32ConfigRISCV by @xgopilot[bot] in #1541
• feat(embed): add baremetal defer support by @luoliwoshang in #1464

ci & tools:

• chore: add xgopilot config to use claude-4.5-opus model by @CarlJi in #1556

deps:

• chore(deps): bump github.com/goplus/mod from 0.18.0 to 0.19.0 by @dependabot[bot] in #1575
• chore(deps): bump github.com/goplus/gogen 1.20.2 by @dependabot[bot] in #1577

New Contributors

• @CarlJi made their first contribution in #1556

Full Changelog: v0.12.0...v0.12.1