Intent: the maintainer, 2026-10-25: "if the verification passed, you are clear to merge to trunk and also tag as 1.0.0."

Expression: brings trunk (d539ac7c21) to 0219f453ae, adding: - cleave's seed needs: - cc/c++ links; - llvm-objdump, llvm-readelf and llvm-size; - the ARM backend on aarch64; - full busybox modutils; - pkg-config and ldd links. - The floating development leaves merged on 2026-10-20: - g14 (dbab4b7013): sysroot-runner fails cleanly on unexpected exceptions, with bdwgc instrumentation; - g12 (e9dd87ad0a): bit-identical seed (SOURCE_DATE_EPOCH, -ffile-prefix-map, build state left out); - the sysroot-functest harness (cd8783522f). - Crystal 1.21 support: sysroot-namespace enters the user namespace by fork+exec. - The BQ2/OCX tool contract (FUNCTEST.md). - Seed fixes: - one exclude list for both tarball writers; - PAX for long names; - the Crystal cache kept in /tmp; - busybox Kconfig set in Crystal; - hard links stored once; - /etc/passwd and /etc/group; - USER set in the namespace. - Three named toolchains drive every phase env, with one after-LLVM switch rule. The system LLVM is built once, and --single-stage-llvm is opt-in. - Ship less: - no libclang; - unused archives and tools pruned; - debug info stripped once per file; - git and bq2 installed as symlinked multi-call binaries. - Version 1.0.0.

Demonstrates: the merged tree is identical to 0219f453ae. crystal spec gives 198 examples, 0 failures, 4 pending. Verification on x86_64 is recorded in 0219f453ae: - seeds B and C byte-identical at 0f09d5412f; - seeds F and G byte-identical (101,680,340 bytes) at bd4cc17010; - in G: Crystal self-hosts, its spec suites pass apart from 2 sandbox-only std_spec cases, and Fossil, git and the bq2 applets pass.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01PCfptovmnPWyqTgXoZKNdx Leaf check-in: c86ec69825 user: run-58530641 tags: 1.0.0, origin/codex-development-20260223, origin/codex/bookmark-state, origin/codex/fix-sysroot-runner-overwriting-issue-m0vpua, trunk