feat: wire memory hygiene into the heartbeat loop (#195)

* feat: wire memory hygiene into heartbeat loop (#166)

* refactor: address PR review comments for hygiene wiring

* style: fix fmt import ordering and clippy too_many_arguments warning

* fix: update heartbeat integration test to pass HygieneConfig argument

HeartbeatRunner::new() now requires a HygieneConfig as its second
argument after the hygiene wiring refactor. Pass the default config
in the integration test.

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

---------

Co-authored-by: Claude Sonnet 4.6 <[email protected]>
Co-authored-by: Illia Polosukhin <[email protected]>

src/config/hygiene.rs

@@ -0,0 +1,70 @@
+use crate::config::helpers::optional_env;
+use crate::error::ConfigError;
+
+/// Memory hygiene configuration.
+///
+/// Controls automatic cleanup of stale workspace documents.
+/// Maps to `crate::workspace::hygiene::HygieneConfig`.
+#[derive(Debug, Clone)]
+pub struct HygieneConfig {
+    /// Whether hygiene is enabled. Env: `MEMORY_HYGIENE_ENABLED` (default: true).
+    pub enabled: bool,
+    /// Days before `daily/` documents are deleted. Env: `MEMORY_HYGIENE_RETENTION_DAYS` (default: 30).
+    pub retention_days: u32,
+    /// Minimum hours between hygiene passes. Env: `MEMORY_HYGIENE_CADENCE_HOURS` (default: 12).
+    pub cadence_hours: u32,
+}
+
+impl Default for HygieneConfig {
+    fn default() -> Self {
+        Self {
+            enabled: true,
+            retention_days: 30,
+            cadence_hours: 12,
+        }
+    }
+}
+
+impl HygieneConfig {
+    pub(crate) fn resolve() -> Result<Self, ConfigError> {
+        Ok(Self {
+            enabled: optional_env("MEMORY_HYGIENE_ENABLED")?
+                .map(|s| s.parse())
+                .transpose()
+                .map_err(|e| ConfigError::InvalidValue {
+                    key: "MEMORY_HYGIENE_ENABLED".to_string(),
+                    message: format!("must be 'true' or 'false': {e}"),
+                })?
+                .unwrap_or(true),
+            retention_days: optional_env("MEMORY_HYGIENE_RETENTION_DAYS")?
+                .map(|s| s.parse())
+                .transpose()
+                .map_err(|e| ConfigError::InvalidValue {
+                    key: "MEMORY_HYGIENE_RETENTION_DAYS".to_string(),
+                    message: format!("must be a positive integer: {e}"),
+                })?
+                .unwrap_or(30),
+            cadence_hours: optional_env("MEMORY_HYGIENE_CADENCE_HOURS")?
+                .map(|s| s.parse())
+                .transpose()
+                .map_err(|e| ConfigError::InvalidValue {
+                    key: "MEMORY_HYGIENE_CADENCE_HOURS".to_string(),
+                    message: format!("must be a positive integer: {e}"),
+                })?
+                .unwrap_or(12),
+        })
+    }
+
+    /// Convert to the workspace hygiene config, resolving the state directory
+    /// to the standard `~/.ironclaw` location.
+    pub fn to_workspace_config(&self) -> crate::workspace::hygiene::HygieneConfig {
+        crate::workspace::hygiene::HygieneConfig {
+            enabled: self.enabled,
+            retention_days: self.retention_days,
+            cadence_hours: self.cadence_hours,
+            state_dir: dirs::home_dir()
+                .unwrap_or_else(|| std::path::PathBuf::from("."))
+                .join(".ironclaw"),
+        }
+    }
+}

src/config/mod.rs

@@ -12,6 +12,7 @@ mod database;
 mod embeddings;
 mod heartbeat;
 pub(crate) mod helpers;
+mod hygiene;
 mod llm;
 mod routines;
 mod safety;
@@ -34,6 +35,7 @@ pub use self::channels::{ChannelsConfig, CliConfig, GatewayConfig, HttpConfig};
 pub use self::database::{DatabaseBackend, DatabaseConfig, default_libsql_path};
 pub use self::embeddings::EmbeddingsConfig;
 pub use self::heartbeat::HeartbeatConfig;
+pub use self::hygiene::HygieneConfig;
 pub use self::llm::{
     AnthropicDirectConfig, LlmBackend, LlmConfig, NearAiApiMode, NearAiConfig, OllamaConfig,
     OpenAiCompatibleConfig, OpenAiDirectConfig, TinfoilConfig,
@@ -67,6 +69,7 @@ pub struct Config {
     pub secrets: SecretsConfig,
     pub builder: BuilderModeConfig,
     pub heartbeat: HeartbeatConfig,
+    pub hygiene: HygieneConfig,
     pub routines: RoutineConfig,
     pub sandbox: SandboxModeConfig,
     pub claude_code: ClaudeCodeConfig,
@@ -190,6 +193,7 @@ impl Config {
             secrets: SecretsConfig::resolve().await?,
             builder: BuilderModeConfig::resolve()?,
             heartbeat: HeartbeatConfig::resolve(settings)?,
+            hygiene: HygieneConfig::resolve()?,
             routines: RoutineConfig::resolve()?,
             sandbox: SandboxModeConfig::resolve()?,
             claude_code: ClaudeCodeConfig::resolve()?,