yusing · yusing · Aug 20, 2026
diff --git a/content/docs/godoxy/Setup.mdx b/content/docs/godoxy/Setup.mdx
@@ -27,12 +27,6 @@ To change listening ports, modify `.env`.
 
 </Callout>
 
-<Callout type="info">
-`.env.example` lists optional runtime toggles. If GoDoxy crashes with **`SIGILL: illegal instruction`**,
-set **`USE_SONIC_JSON=false`** in `.env` (see [Configuring GoDoxy — Runtime process environment](./getting-started/Configuring-GoDoxy#runtime-process-environment)).
-
-</Callout>
-
 1. Prepare a new directory for docker compose and config files.
 
 2. Run setup script inside the directory

diff --git a/content/docs/godoxy/getting-started/Basics.mdx b/content/docs/godoxy/getting-started/Basics.mdx
@@ -51,9 +51,6 @@ Doing this will make your host has only **one** exposed service, which is GoDoxy
 | `GODOXY_LOCAL_API_ADDR` | Local API server listening address for unauthenticated access | -                | `[host]:port` |
 | `GODOXY_HTTP3_ENABLED`  | Enable HTTP/3                                                 | `true`           | boolean       |
 | `GODOXY_DEBUG`          | Enable debug behaviors and logging                            | `false`          | boolean       |
-| `USE_SONIC_JSON`        | \*Use "bytedance/sonic" library for efficient JSON handling   | `true `          | boolean       |
-
-\*: For ancient CPUs you may see "SIGILL: illegal instructions" error, please set `USE_SONIC_JSON` to false .
 
 ### Authentication
 

diff --git a/content/docs/impl/internal-homepage-integrations-qbittorrent.mdx b/content/docs/impl/internal-homepage-integrations-qbittorrent.mdx
@@ -224,4 +224,4 @@ if resp.StatusCode != http.StatusOK {
 ## Related Packages
 
 - `internal/homepage/widgets` - Widget framework and interface
-- `github.com/yusing/goutils/strings` - String utilities and JSON helpers (`MarshalJSON`, `NewJSONDecoder`; backend: sonic via `internal/serialization`)
+- `github.com/yusing/goutils/strings` - String utilities and JSON helpers (`MarshalJSON`, `NewJSONDecoder`; backend: `encoding/json/v2` via `internal/serialization`)
diff --git a/content/docs/impl/internal-jsonstore.mdx b/content/docs/impl/internal-jsonstore.mdx
@@ -364,5 +364,5 @@ if err := strutils.UnmarshalJSON(data, &tmp); err != nil {
 
 - Uses `xsync.Map` for lock-free reads
 - Presizes maps based on input data
-- JSON via `github.com/yusing/goutils/strings` helpers (in godoxy, sonic is registered as the backend from `internal/serialization`)
+- JSON via `github.com/yusing/goutils/strings` helpers (in godoxy, `encoding/json/v2` is registered as the backend from `internal/serialization`)
 - Background periodic save plus a save on program exit; unchanged namespaces are skipped
diff --git a/content/docs/impl/internal-metrics-period.mdx b/content/docs/impl/internal-metrics-period.mdx
@@ -287,7 +287,7 @@ None.
 | ------------------------------------------ | ------------------------ |
 | `github.com/gin-gonic/gin`                 | HTTP handling            |
 | `github.com/yusing/goutils/http/websocket` | WebSocket streaming      |
-| `github.com/yusing/goutils/strings`        | JSON serialization (backend: sonic via `internal/serialization`) |
+| `github.com/yusing/goutils/strings`        | JSON serialization (backend: `encoding/json/v2` via `internal/serialization`) |
 | `github.com/yusing/goutils/task`           | Lifetime management      |
 | `github.com/puzpuzpuz/xsync/v4`            | Concurrent value storage |
 

diff --git a/content/docs/impl/internal-metrics-uptime.mdx b/content/docs/impl/internal-metrics-uptime.mdx
@@ -221,7 +221,7 @@ No explicit configuration. The poller uses period package defaults:
 | Dependency                               | Purpose          |
 | ---------------------------------------- | ---------------- |
 | `github.com/lithammer/fuzzysearch/fuzzy` | Keyword matching |
-| `github.com/yusing/goutils/strings`      | JSON marshaling (backend: sonic via `internal/serialization`) |
+| `github.com/yusing/goutils/strings`      | JSON marshaling (backend: `encoding/json/v2` via `internal/serialization`) |
 
 ### Integration Points
 

diff --git a/content/docs/impl/internal-metrics.mdx b/content/docs/impl/internal-metrics.mdx
@@ -98,7 +98,7 @@ No explicit configuration. Pollers respect `common.MetricsDisable*` flags:
 
 - `github.com/shirou/gopsutil/v4` - System metrics collection
 - `github.com/puzpuzpuz/xsync/v4` - Atomic value storage
-- `github.com/yusing/goutils/strings` - JSON serialization helpers (backend: sonic via `internal/serialization`)
+- `github.com/yusing/goutils/strings` - JSON serialization helpers (backend: `encoding/json/v2` via `internal/serialization`)
 
 ## Observability
 

diff --git a/content/docs/impl/internal-serialization.mdx b/content/docs/impl/internal-serialization.mdx
@@ -215,17 +215,7 @@ autocert:
 - `github.com/go-playground/validator/v10` - Validation
 - `github.com/puzpuzpuz/xsync/v4` - Type cache
 - `github.com/yusing/goutils/strings` - Pluggable JSON marshal/unmarshal/streaming API used across godoxy
-- `github.com/bytedance/sonic` - Optional JSON backend for that API: registered in `init()` when **`USE_SONIC_JSON`** is true (process env via `env.GetEnvBool`, default **true**).
-- Set **`USE_SONIC_JSON=false`** if the binary hits **`SIGILL: illegal instruction`** on hardware that lacks the assumptions Sonic relies on.
-
-### `USE_SONIC_JSON`
-
-| Value            | Behavior                                                                                        |
-| ---------------- | ----------------------------------------------------------------------------------------------- |
-| `true` (default) | `setupSonic()` wires Sonic into `strutils` for marshal, unmarshal, indent, and encoder helpers. |
-| `false`          | Sonic is not registered; JSON uses whatever default `strutils` provides without explicit setup. |
-
-Documented in repository `.env.example`, `rootless.env.example`, agent compose template (`agent/pkg/agent/templates/agent.compose.yml.tmpl`), and `scripts/install-agent.sh`.
+- `encoding/json/v2` and `encoding/json/jsontext` - JSON backend registered in `init()` (`setupJSONV2()`). `time.Duration` keeps v1 nanosecond numbers via `encoding/json.FormatDurationAsNano`.
 
 ### Internal Dependencies