refactor: per-agent state paths (/agents/{label}/state), centralize in paths.rs

hive-ag3nt/src/login.rs

@@ -1,6 +1,6 @@
 //! Login-state probe for the bind-mounted `~/.claude/` dir. The dir is
-//! provided by hive-c0re (Phase 8 step 1) and persists across container
-//! destroy/recreate so OAuth tokens survive.
+//! provided by hive-c0re and persists across container destroy/recreate so
+//! OAuth tokens survive.
 //!
 //! "Has session" today means "the dir contains at least one regular file."
 //! That's a heuristic: a fresh bind-mount starts empty, and `claude auth login`
@@ -8,11 +8,15 @@
 //! specific credentials filename, or run a no-op `claude` call) once the
 //! exact layout is locked in.
 
-use std::path::Path;
+use std::path::{Path, PathBuf};
 
-/// Mount point of the per-agent Claude credentials dir inside the container.
-/// Matches `hive_c0re::lifecycle::CONTAINER_CLAUDE_MOUNT`.
-pub const DEFAULT_CLAUDE_DIR: &str = "/root/.claude";
+/// Returns the Claude credentials directory for this agent, derived from
+/// `HIVE_LABEL`. Manager ("hm1nd") uses `/root/.claude`; sub-agents use
+/// `/agents/{label}/claude`. Overridable via `HYPERHIVE_CLAUDE_DIR`.
+#[must_use]
+pub fn default_dir() -> PathBuf {
+    crate::paths::claude_dir()
+}
 
 /// Returns `true` if `dir` exists and contains any regular file. Used at
 /// startup to decide whether to enter the turn loop (logged in) or stay in