docs(shell): perbaiki doc comment shell_filter yang menyesatkan soal credential-read

CLAUDE.md

@@ -30,7 +30,7 @@ Detailed architecture documentation is in `docs/CODEMAPS/`:
 - **Error handling** — `anyhow::Result` and `anyhow::bail!` throughout. No custom error types.
 - **Static strings** — MCP tool descriptions use `Box::leak` + `OnceLock` cache.
 - **Tools** — `trait Tool { fn name() -> &str, fn run() -> Result<String> }`, 28 impls, gated by `Harness`.
-- **Shell safety** — `tool/shell_filter/` blocks credential leaks and destructive git commands.
+- **Shell safety** — `tool/shell_filter/` blocks destructive git commands (`shell_filter::git::check_git_destructive`, called from `tool/shell.rs::Bash::run`). It also contains a `check_credential_read` detector for credential-file reads, but that one is intentionally NOT wired into `Bash::run` today — see the doc comment on `Bash::run` for why.
 
 ### Hive-Mind Orchestration (Machine Intelligence)
 

crates/zesdex-backend/src/tool/shell.rs

@@ -44,16 +44,22 @@ impl Tool for Bash {
         })
     }
 
-    /// Run a bash command (foreground or background) with safety filters and a timeout.
+    /// Run a bash command (foreground or background) with a safety filter and a timeout.
     ///
-    /// Flow: extract args → run `check_credential_read` then `check_git_destructive`
-    ///       (bail if either rejects) → branch on `run_in_background`: if true, hand off
-    ///       to the bg-bash subsystem and return the job ID; else spawn `bash -c`,
-    ///       poll with `try_wait`, kill on timeout, format combined stdout+stderr.
+    /// Flow: extract args → run `check_git_destructive` (bail if it rejects) → branch on
+    ///       `run_in_background`: if true, hand off to the bg-bash subsystem and return the
+    ///       job ID; else spawn `bash -c`, poll with `try_wait`, kill on timeout, format
+    ///       combined stdout+stderr.
     ///
-    /// Why: the safety filters run unconditionally so background jobs are also gated;
-    /// the timeout is enforced by polling the child rather than relying on a libc alarm
-    /// so cleanup stays in Rust.
+    /// Why: only destructive git operations are gated here — credential-file reads
+    /// (`~/.ssh/id_rsa`, `.netrc`, etc.) are deliberately NOT blocked, since the agent
+    /// often needs to read local config for legitimate debugging; the real leak vector
+    /// (committing secrets to a remote) is handled by git hooks/user review, not this
+    /// tool. `shell_filter::credentials::check_credential_read` exists but is
+    /// intentionally not called from here — see its module doc comment. The safety
+    /// filter runs unconditionally so background jobs are also gated; the timeout is
+    /// enforced by polling the child rather than relying on a libc alarm so cleanup
+    /// stays in Rust.
     ///
     /// Return: exit-code + elapsed-seconds summary line (plus captured output) for
     /// foreground runs, or the job ID for background runs.

crates/zesdex-backend/src/tool/shell_filter/credentials.rs

@@ -1,4 +1,10 @@
-//! Block shell commands that try to read common credential files or secrets.
+//! Credential-file-read detection.
+//!
+//! Not currently called from `tool::shell::Bash::run` — see that function's
+//! doc comment for why credential reads are intentionally allowed. This
+//! module is kept for callers that DO want to block credential reads (e.g.
+//! a future sandboxed/untrusted-tool execution path) and is covered by its
+//! own inline tests below.
 use anyhow::Result;
 
 /// Reject shell commands whose lowercased form contains any known credential-read pattern.