chore(git): ignore custom documentation files

Add AGENTS.md and CLAUDE.md to .gitignore to exclude project-specific documentation files.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

crates/platform/config/.gitignore

@@ -0,0 +1,22 @@
+/target
+### Rust template
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+### rust-analyzer template
+# Can be generated by other build systems other than cargo (ex: bazelbuild/rust_rules)
+rust-project.json
+
+

crates/platform/config/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "config-agent"
+version = "0.1.0"
+edition.workspace = true
+license.workspace = true
+rust-version.workspace = true
+
+[dependencies]
+serde = { version = "1", features = ["derive"] }
+directories = "5"
+figment = { version = "0.10", features = ["toml", "env"] }
+tempfile = "3.23.0"

crates/platform/config/src/lib.rs

@@ -0,0 +1,62 @@
+use directories::ProjectDirs;
+use figment::{
+    Figment,
+    providers::{Env, Format, Serialized, Toml},
+};
+use serde::{Deserialize, Serialize};
+use std::path::PathBuf;
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Settings {
+    #[serde(default = "default_ollama_url")]
+    pub ollama_url: String,
+    #[serde(default = "default_model")]
+    pub model: String,
+    #[serde(default = "default_mode")]
+    pub mode: String, // "plan" (read-only) for now
+    #[serde(default)]
+    pub api_key: Option<String>, // For Ollama Cloud or other API authentication
+}
+
+fn default_ollama_url() -> String {
+    "http://localhost:11434".into()
+}
+fn default_model() -> String {
+    "qwen3:8b".into()
+}
+fn default_mode() -> String {
+    "plan".into()
+}
+
+impl Default for Settings {
+    fn default() -> Self {
+        Self {
+            ollama_url: default_ollama_url(),
+            model: default_model(),
+            mode: default_mode(),
+            api_key: None,
+        }
+    }
+}
+
+pub fn load_settings(project_root: Option<&str>) -> Result<Settings, figment::Error> {
+    let mut fig = Figment::from(Serialized::defaults(Settings::default()));
+
+    // User file: ~/.config/owlen/config.toml
+    if let Some(pd) = ProjectDirs::from("dev", "owlibou", "owlen") {
+        let user = pd.config_dir().join("config.toml");
+        fig = fig.merge(Toml::file(user));
+    }
+
+    // Project file: <root>/.owlen.toml
+    if let Some(root) = project_root {
+        fig = fig.merge(Toml::file(PathBuf::from(root).join(".owlen.toml")));
+    }
+
+    // Environment variables have highest precedence
+    fig = fig.merge(Env::prefixed("OWLEN_").split("__"));
+    // Support OLLAMA_API_KEY, OLLAMA_MODEL, etc. (without nesting)
+    fig = fig.merge(Env::prefixed("OLLAMA_"));
+
+    fig.extract()
+}

crates/platform/config/tests/precedence.rs

@@ -0,0 +1,19 @@
+use config_agent::{load_settings, Settings};
+use std::{env, fs};
+
+#[test]
+fn precedence_env_overrides_files() {
+    let tmp = tempfile::tempdir().unwrap();
+    let project_file = tmp.path().join(".owlen.toml");
+    fs::write(&project_file, r#"model="local-model""#).unwrap();
+
+    unsafe { env::set_var("OWLEN_MODEL", "env-model"); }
+    let s = load_settings(Some(tmp.path().to_str().unwrap())).unwrap();
+    assert_eq!(s.model, "env-model");
+}
+
+#[test]
+fn default_mode_is_plan() {
+    let s = Settings::default();
+    assert_eq!(s.mode, "plan");
+}