The Acton programming language Files

This release is another proxy workaround release. Acton now keeps one more dependency path away from Zig's own fetcher because Zig still cannot reliably fetch HTTPS archives through an HTTP CONNECT proxy.

Packages & Distribution

• Pre-seed Zig's package cache for transitive .url dependencies declared by path-based Zig packages in build.zig.zon, using Acton's proxy-aware HTTP downloader instead of letting Zig fetch those archives during final compilation. [#2970]
• This covers Acton package dependencies such as acton-zlib that carry a local Zig package whose own manifest pulls a source archive like zlib_upstream; previously acton fetch could succeed through the proxy and then acton build still failed later when Zig tried to resolve the nested archive itself.
• The workaround is intentionally boring: parse enough ZON to find dependency url, hash, path, and lazy fields, follow local path deps, seed non-lazy remote archives into the same Zig cache, and avoid cycles or duplicate downloads.
• We only need this because Zig's CONNECT proxy support is still broken for this path: it sends an absolute-form request URI inside the tunnel and the origin closes the connection, typically surfacing as invalid HTTP response: HttpConnectionClosing.
• The proxy regression harness now builds a project that depends on a real Acton package with a transitive Zig dependency, so proxy-only networks cover the frustrating "fetch succeeded, final compile failed anyway" case.