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

node/configuration.md

@@ -0,0 +1,81 @@
+# Node Configuration
+
+This page documents configuration options for the `apply` subcommand used to deploy and configure nodes.
+
+<!-- TODO: expand with full apply subcommand reference -->
+
+## `apply` subcommand
+
+The `apply` subcommand provisions a node using a specified preset and configuration flags.
+
+### Presets
+
+Use `--preset` to select the node profile. Available presets include:
+
+- `genesis-chain` — deploy a genesis node with full chain initialization
+- `rpc` — deploy an RPC node
+
+<!-- TODO: expand preset list -->
+
+---
+
+## Genesis Overrides (`--genesis-override`)
+
+When deploying a node with `--preset genesis-chain`, you can use the `--genesis-override` flag to set individual genesis parameters without modifying a full genesis file.
+
+Each override targets a dotted path within `spec.genesis.overrides`, following the structure `<module>.<field>[.<subfield>...]`.
+
+### Syntax
+
+```
+--genesis-override <module.field[.field...]>=<value>
+```
+
+The key must contain **at least two segments** (a module name and at least one field). Single-segment keys are not accepted.
+
+The flag is **repeatable** — you can supply multiple overrides in a single command:
+
+```bash
+appy apply \
+  --preset genesis-chain \
+  --genesis-override staking.params.unbonding_time=600s \
+  --genesis-override gov.params.voting_period=120s
+```
+
+### Value parsing
+
+Values are parsed as JSON where possible:
+
+| Input | Stored as |
+|---|---|
+| `42` | number |
+| `true` / `false` | boolean |
+| `{"key":"val"}` | object |
+| `600s` | string (not valid JSON) |
+
+If the value cannot be parsed as valid JSON, it is stored as a plain string.
+
+To force a numeric-looking value to be stored as a string, wrap it in JSON quotes:
+
+```bash
+--genesis-override staking.params.some_field='"42"'
+```
+
+### Example
+
+Set the staking unbonding time and the governance voting period when deploying a genesis chain node:
+
+```bash
+appy apply \
+  --preset genesis-chain \
+  --genesis-override staking.params.unbonding_time=600s \
+  --genesis-override gov.params.voting_period=86400s
+```
+
+### Restriction
+
+`--genesis-override` is **only valid with `--preset genesis-chain`**. Using it with any other preset (such as `rpc`) will produce a validation error:
+
+```
+error: --genesis-override is only valid with --preset genesis-chain
+```