diff --git a/apps/cli/docs/go-cli-porting-status.md b/apps/cli/docs/go-cli-porting-status.md
index 0e596515b4..125c1f795c 100644
--- a/apps/cli/docs/go-cli-porting-status.md
+++ b/apps/cli/docs/go-cli-porting-status.md
@@ -323,6 +323,9 @@ Flag divergences from the Go reference:
   `reveal=true` so the Management API returns the full secret keys (`sb_secret_...`) in
   full instead of redacting them, addressing issue #4775. Default behavior (omitted flag)
   matches Go exactly.
+- `projects create` has a TS-only `--high-availability` flag (no Go equivalent). It sets
+  `high_availability` in the create request body. Default behavior (omitted flag) matches
+  Go exactly.
 
 Behavioral divergences from the Go reference:
 
diff --git a/apps/cli/src/legacy/commands/projects/create/SIDE_EFFECTS.md b/apps/cli/src/legacy/commands/projects/create/SIDE_EFFECTS.md
index 73d151ebd5..1a9d18c419 100644
--- a/apps/cli/src/legacy/commands/projects/create/SIDE_EFFECTS.md
+++ b/apps/cli/src/legacy/commands/projects/create/SIDE_EFFECTS.md
@@ -40,22 +40,22 @@
 
 ## Telemetry Events Fired
 
-| Event                  | When                                       | Notable properties / groups                                                                |
-| ---------------------- | ------------------------------------------ | ------------------------------------------------------------------------------------------ |
-| `cli_command_executed` | post-run, success or failure (via wrapper) | `exit_code`, `duration_ms`, `flags` (`--org-id`, `--high-availability` are telemetry-safe) |
+| Event                  | When                                       | Notable properties / groups                                                     |
+| ---------------------- | ------------------------------------------ | ------------------------------------------------------------------------------- |
+| `cli_command_executed` | post-run, success or failure (via wrapper) | `exit_code`, `duration_ms`, `flags` (`--org-id` is telemetry-safe, matching Go) |
 
 ## Flags
 
-| Flag                  | Type   | Required (non-interactive) | Description                                     |
-| --------------------- | ------ | -------------------------- | ----------------------------------------------- |
-| `[project name]`      | arg    | yes (non-interactive)      | Name of the project (positional argument)       |
-| `--org-id`            | string | yes (non-interactive)      | Organization ID (slug) to create the project in |
-| `--db-password`       | string | yes (non-interactive)      | Database password for the project               |
-| `--region`            | enum   | yes (non-interactive)      | AWS region for the project                      |
-| `--size`              | enum   | no                         | Desired instance size                           |
-| `--high-availability` | bool   | no                         | Enable high availability for the project        |
-| `--interactive`       | bool   | no (default: true)         | Enable interactive mode (hidden flag)           |
-| `--plan`              | string | no                         | Plan selection (hidden flag)                    |
+| Flag                  | Type   | Required (non-interactive) | Description                                                                  |
+| --------------------- | ------ | -------------------------- | ---------------------------------------------------------------------------- |
+| `[project name]`      | arg    | yes (non-interactive)      | Name of the project (positional argument)                                    |
+| `--org-id`            | string | yes (non-interactive)      | Organization ID (slug) to create the project in                              |
+| `--db-password`       | string | yes (non-interactive)      | Database password for the project                                            |
+| `--region`            | enum   | yes (non-interactive)      | AWS region for the project                                                   |
+| `--size`              | enum   | no                         | Desired instance size                                                        |
+| `--high-availability` | bool   | no                         | Enable high availability for the project (**TS-only, no Go CLI equivalent**) |
+| `--interactive`       | bool   | no (default: true)         | Enable interactive mode (hidden flag)                                        |
+| `--plan`              | string | no                         | Plan selection (hidden flag)                                                 |
 
 ## Output
 
@@ -93,4 +93,8 @@ One `result` event on success.
   flags and the positional project name argument are required.
 - The `--size` flag, when provided, sets the `desired_instance_size` field in the request body.
 - The `--high-availability` flag, when provided, sets the `high_availability` field in the request body.
+  This is a TS-only flag with no Go CLI equivalent: `apps/cli-go/cmd/projects.go`'s `init()` (~line 133)
+  never registers a `high-availability` flag, and the create command's `RunE` closure (~line 74) never sets
+  `HighAvailability` on the request body, even though the underlying API field exists — matching how
+  `--reveal` is disclosed on `projects api-keys`.
 - The `--plan` flag is hidden and reserved.
diff --git a/apps/cli/src/legacy/commands/projects/create/create.command.ts b/apps/cli/src/legacy/commands/projects/create/create.command.ts
index 238f33c508..1dd0e5f3f5 100644
--- a/apps/cli/src/legacy/commands/projects/create/create.command.ts
+++ b/apps/cli/src/legacy/commands/projects/create/create.command.ts
@@ -69,6 +69,10 @@ const config = {
     Flag.withDescription("Select a desired instance size for your project."),
     Flag.optional,
   ),
+  // TS-only, no Go CLI equivalent: `cmd/projects.go`'s `init()` never registers a
+  // `high-availability` flag, and the `RunE` closure's `api.V1CreateProjectBody{...}`
+  // never sets `HighAvailability` even though the API field exists — disclosed in
+  // SIDE_EFFECTS.md, matching how `--reveal` is disclosed on `projects api-keys`.
   highAvailability: Flag.boolean("high-availability").pipe(
     Flag.withDescription("Enable high availability for the project."),
     Flag.optional,
@@ -99,11 +103,13 @@ export const legacyProjectsCreateCommand = Command.make("create", config).pipe(
   ]),
   Command.withHandler((flags) =>
     legacyProjectsCreate(flags).pipe(
-      withLegacyCommandInstrumentation({
-        flags,
-        safeFlags: ["org-id", "high-availability"],
-        config,
-      }),
+      // `high-availability` is intentionally not in `safeFlags`: Go marks only
+      // `org-id` telemetry-safe (`markFlagTelemetrySafe`), and it's a boolean flag
+      // anyway — boolean values are always logged verbatim by the instrumentation
+      // regardless of `safeFlags`. See the same pattern on `projects api-keys`'s
+      // `--reveal`. `config` is passed so `region`/`size` (both `Flag.choice`)
+      // are auto-detected as telemetry-safe, matching Go's `isEnumFlag`.
+      withLegacyCommandInstrumentation({ flags, safeFlags: ["org-id"], config }),
       withJsonErrorHandling,
     ),
   ),