Kiro is having trouble responding right now: 0: Failed to send the request: An unknown error occurred: ValidationException 1: An unknown error occurred: ValidationException 2: unhandled error (ValidationException) 3: service error 4: unhand

### Checks

- [x] I have searched [github.com/aws/amazon-q-developer-cli/issues](https://github.com/aws/amazon-q-developer-cli/issues?q=) and there are no duplicates of my issue
- [x] I have run `q doctor` in the affected terminal session
- [x] I have run `q restart` and replicated the issue again

### Operating system

macOS 26.2.0 (25C56)

### Expected behaviour

It allows me to allocate more cache. Has cache management where anything older it ages to file and continues to work on my current requests. It should be able to fix the errors on its own and let me work without nasty feedback on screen

### Actual behaviour

This was working till last week. This week, it has kept giving me this error since morning for multiple interfaces.
The cache has started running out like after 1 command from 4% to 98%.

### Steps to reproduce

_No response_

### Environment

```yaml

[q-details]
version = "1.26.0"
hash = "efa4a1819cc7fe8f2a556aed24db114e3ddd46c2"
date = "2026-02-13T03:42:07.610083Z (4d ago)"
variant = "full"

[system-info]
os = "macOS 26.2.0 (25C56)"
chip = "Apple M3 Pro"
total-cores = 11
memory = "18.00 GB"

[environment]
cwd = "/Users/USER/mydocs/MDTHINK/021626"
cli-path = "/Users/USER/mydocs/MDTHINK/021626"
os = "Mac"
shell-path = "/bin/zsh"
shell-version = "5.9"
terminal = "macOS"
install-method = "unknown"

[env-vars]
PATH = "/Users/USER/.volta/bin/:/Users/USER/.venv/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/Library/Frameworks/Python.framework/Versions/3.12/bin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/opt/pmk/env/global/bin:/usr/local/go/bin:/Applications/quarto/bin:/Users/USER/.volta/bin:/Users/USER/.cargo/bin:/Users/USER/.local/bin:/Applications/Visual Studio Code.app/Contents/Resources/app/bin:/Users/USER/.toolbox/bin"
QTERM_SESSION_ID = "12f1dabc341f4338a263b5ec0f9e7bfd"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.26.0"
SHELL = "/bin/zsh"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.apple.Terminal"
```