docs: A new --genesis-override CLI flag was added to the apply command, allowing developers to set genesis parameters (e.g., staking unbonding time, governance voting period) when deploying nodes with the genesis-chain preset. (sei-protocol/seictl#184)

node/configuration.md

@@ -0,0 +1,102 @@
+# Node Configuration
+
+This page describes configuration options for deploying and managing nodes.
+
+## The `apply` subcommand
+
+The `apply` subcommand deploys or updates a node according to the specified configuration flags.
+
+```
+apply [flags]
+```
+
+### Flags
+
+| Flag | Type | Description |
+|------|------|-------------|
+| `--preset` | string | The deployment preset to use (e.g. `genesis-chain`). |
+| `--genesis-override` | string slice | Set genesis module parameters. Only valid with `--preset genesis-chain`. Repeatable. |
+
+---
+
+## `--genesis-override`
+
+The `--genesis-override` flag allows you to set individual genesis module parameters when deploying a node with the `genesis-chain` preset.
+
+### Syntax
+
+```
+--genesis-override <module.field[.field...]>=<value>
+```
+
+The key must be a dotted cosmos-module path that identifies the parameter to override, starting with the module name followed by one or more field names:
+
+```
+<module>.<field>[.<field>...]
+```
+
+The flag is repeatable — pass it multiple times to override several parameters:
+
+```bash
+apply \
+  --preset genesis-chain \
+  --genesis-override staking.params.unbonding_time=600s \
+  --genesis-override gov.params.voting_period=120s
+```
+
+### Value parsing
+
+Values are parsed using a **JSON-first** strategy:
+
+- If the value is valid JSON (a number, boolean, object, or array), it is stored as the corresponding JSON type.
+- If the value is not valid JSON, it is stored as a raw string.
+
+Examples:
+
+| Raw value | Parsed as |
+|-----------|-----------|
+| `true` | JSON boolean |
+| `42` | JSON number |
+| `600s` | string (not valid JSON) |
+| `{"key":"val"}` | JSON object |
+
+To force a value that looks like a valid JSON number or boolean to be treated as a string, wrap it in JSON quotes:
+
+```bash
+--genesis-override foo.bar='"42"'
+```
+
+### Constraint: requires `--preset genesis-chain`
+
+`--genesis-override` is only valid when `--preset genesis-chain` is also specified. Using it with any other preset — or without a preset — returns a usage error:
+
+```
+error: --genesis-override is only valid with --preset genesis-chain
+```
+
+### Examples
+
+Override the staking unbonding time and governance voting period:
+
+```bash
+apply \
+  --preset genesis-chain \
+  --genesis-override staking.params.unbonding_time=600s \
+  --genesis-override gov.params.voting_period=120s
+```
+
+Set a parameter whose value is a JSON boolean:
+
+```bash
+apply \
+  --preset genesis-chain \
+  --genesis-override slashing.params.slash_fraction_double_sign=0.05
+```
+
+Force a numeric-looking value to be treated as a string:
+
+```bash
+apply \
+  --preset genesis-chain \
+  --genesis-override mymodule.params.version='"2"'
+```