[anycodes]

Description

Public client/server a4 are now verified, while maintained installation/skill/fixture examples still select a3. Update those current examples to exact official-index a4 and preserve historical evidence. Move only the completed readiness, a3-guidance and provider-docstring decisions to implemented.

The a4 publisher also exhausted six metadata-404 probes over 50 seconds after successful uploads. Normal same-tag recovery passed; both preserved artifact sets match all four public files. Extend only the existing metadata404 loop to 18 probes (170 seconds of intervals). Keep installation at six attempts and keep digest/non-404/auth/pip-check/import failures hard. No new framework, SDK runtime change, version bump or republishing. Fixes #126; delivered #124 is already closed after real public verification.

Type of Change

• Bug fix (release workflow)
• Documentation
• Tests

Changes

• Bilingual current installs, both skills and two Docker fixtures select genuinely public a4; CI asserts actual guest a4.
• Existing metadata loop gets a finite allowance beyond the observed first failure; immutable a4 tag/workflow and original failure remain unchanged.
• Reuse the existing executable-shell regression helper for delayed success beyond the former bound, finite exhaustion and unchanged hard failures.
• Add new publication/install/HTTP/recovery evidence; previous evidence files remain unchanged.

Testing

• Fresh official no-cache client-a4 install automatically installed server-a4; pip check/imports/12 corrected async-sync docs/24 retired-keyword rejections/exact reviewed API bytes passed.
• Original and recovery preserved artifacts match each other, official metadata and all four downloaded files.
• Real public-package local HTTP health/shell/file and owned SIGTERM -15/independent PID absence passed. No cloud/model/catalog scope inferred.
• Existing release regressions: 13 passed; combined docstring/release suite: 25 passed. Old immutable six-probe shell actually fails the new seven-failure scenario, current shell passes it.
• Both-package lint/format/mypy, health 106 passed/1 warning/0 failures, hygiene/diff pass.
• Decorator example executable AST unchanged; only its installation docstring changed.
• Exact reviewed head 0b81920: all 13 owner checks SUCCESS, including both actual public-a4 Docker fixture jobs; independent final review passed.

Checklist / Definition of Done

• English/Chinese docs, changelog, scoped owner decision and new verification included.
• No credentials/private resources; no old receipt edited or failed attempt relabelled.
• Client/server remain immutable published a4; no new package publication required for this source-only follow-up.
• Latest-head CI and independent review complete before normal merge.