go-knowledge-patch

# Go Knowledge Patch Use this skill before changing Go source, modules, build pipelines, tests, cryptographic code, HTTP stacks, or platform integrations. Check the relevant topic reference before relying on older defaults or compatibility switches. ## Reference index | Reference | Topics | | --- | --- | | [language-and-core.md](references/language-and-core.md) | Function iterators, templates, language syntax, errors, reflection, time, and regular expressions | | [tooling-modules-and-testing.md](references/tooling-modules-and-testing.md) | Modules, workspaces, `go` commands, vet, caches, source analysis, testing, and profiling | | [runtime-and-observability.md](references/runtime-and-observability.md) | Garbage collection, scheduling, traces, crash recovery, cleanup, heap layout, and metrics | | [filesystem-data-and-encoding.md](references/filesystem-data-and-encoding.md) | Rooted filesystems, links, tar, JSON v2, JPEG, Windows handles, and `fstest` | | [networking-and-http.md](references/networking-and-http.md) | DNS, HTTP protocols, redirects, reverse proxies, CSRF, URL parsing, and MPTCP | | [crypto-tls-and-x509.md](references/crypto-tls-and-x509.md) | FIPS, randomness, signatures, KEM and HPKE, RSA, X.509, SHA-3, and TLS defaults | | [build-linking-and-platforms.md](references/build-linking-and-platforms.md) | Cgo, linker behavior, build IDs, process handles, WASI, architecture profiles, ports, and bootstrap floors | ## Breaking changes and deprecations ### Update re...