Agent 08 · Guard stage
Echo
Regression Guard
Remembers how everything used to work and makes sure it still does — no fix is allowed to break yesterday.
What Echo does
On every change, without exception.
- Existing behaviour unchanged01
- Previously fixed bugs stay fixed02
- Critical user flows intact03
How it works
Three steps, every time.
- 01Replays the behaviour the product already had
- 02Re-runs checks for every bug that was fixed before
- 03Stops any change that breaks yesterday's features
Where Echo works
Stage 03 of 5: Guard.
Together with Lynx, Aegis, Verity, Anchor and Torque, Echo helps check every change from every angle — with senior engineers leading every stage.
03
GuardChecked from every angle
✓
Senior engineers lead every stage — architecture, decisions and sign-off on every release.
The team
All 13 agents
Works alongside
05guard
Lynx
Code Quality GuardSharp-eyed reviewer of every change — readability, structure and duplication — that sends back anything that isn't clean.
- Readability and naming
- Duplication and dead code
- Consistency with the codebase
06guard
Aegis
Code Security GuardStands between your product and attackers. Every line is checked for vulnerabilities before it can ship.
- Injection, auth and access control
- Secrets and sensitive data
- Vulnerable dependencies
07guard
Verity
Acceptance Criteria GuardHolds every change to the promise in the ticket. If the acceptance criteria aren't met, it doesn't pass.
- Every acceptance criterion covered
- Edge cases from the spec
- Nothing built that wasn't asked for