This is a comment left during a code review.
Path: src/config/io.ts
Line: 128-131

Comment:
**Sensitive flag as the last argument is not redacted**

When a sensitive flag appears as the very last element of `argv` (no following value), the guard `i + 1 < argv.length` is `false`, so the code falls through to `out.push(arg)` — the flag name is written to the audit log without any indication that it may have carried a value in a different invocation. This is not a credential leak by itself (no value is present), but it means the logic silently does nothing for the malformed/truncated case rather than treating it uniformly.

More importantly, because `.slice(0, 8)` is applied to the redacted array **after** redaction, consider the following scenario:

```
process.argv = ["node", "openclaw", "a", "b", "c", "d", "e", "--token", "secretval", ...]
//              idx:    0          1    2    3    4    5    6    7          8
```

`redactArgv()` runs on the **full** array. At index 7 (`--token`), `i + 1 = 8 < len` is true, so both `--token` and `[REDACTED]` are pushed and `i` advances to 8 — the result array still has `--token` at index 7 and `[REDACTED]` at index 8. After `.slice(0, 8)` the entry at index 8 is cut off, leaving `--token` without `[REDACTED]`. No value is exposed (the slice removed it either way), but the flag name is still present in the record.

This is safe against leaking values, but it may be worth adding a comment near the `slice(0, 8)` call sites to document that redaction must run before slicing (to avoid accidentally re-ordering them in a future refactor):

```suggestion
    if (SENSITIVE_ARGV_FLAGS.has(arg) && i + 1 < argv.length) {
      out.push(arg, "[REDACTED]");
      i++;
      continue;
    }
    // Note: if a sensitive flag is the last element with no following value,
    // there is nothing to redact — pass it through unchanged.
```

How can I resolve this? If you propose a fix, please make it concise.

---

This is a comment left during a code review.
Path: src/config/io.ts
Line: 114-136

Comment:
**No unit tests for security-critical `redactArgv` helper**

`redactArgv()` is an untested security helper guarding against credential leaks in the audit log. The existing test files (`io.write-config.test.ts`, `io.observe-config.test.ts`) contain no coverage of the argv redaction behavior.

Given the security sensitivity and the two distinct code paths (`--flag value` and `--flag=value`), this function is a strong candidate for unit tests. Because it is currently module-private it cannot be tested in isolation — it either needs to be exported for a colocated test or covered via the full audit-log write path.

Suggested cases worth covering:
- `--flag value` form is redacted
- `--flag=value` form is redacted
- Non-sensitive flags pass through unchanged
- Sensitive flag as the last element (no following value) does not crash
- Chained sensitive flags are all independently redacted

How can I resolve this? If you propose a fix, please make it concise.