| name | vzt-fix |
| description | Root-cause a hard bug on Fable 5 with full conversation context. Use for impossible bugs — race conditions, heisenbugs, corruption, intermittent failures — especially after cheaper attempts in this session have failed. Usage: /vzt-fix <symptom or bug description>. |
| model | fable |
| effort | max |
VZT Fix — frontier debugging turn (Fable 5)
This turn runs on Fable 5. Everything already tried in this conversation is
context — do not repeat failed attempts; reason about why they failed.
- Trace before theorizing. Reproduce the failure or instrument the real
path (logs, targeted Bash probes). An untested hypothesis is not a finding.
- Adversarial self-check. Before concluding, name the evidence that would
refute your root cause and check it.
- Separate cause from trigger. The crashing line is rarely the wrong line.
- Deliver a fix packet:
- Root cause (mechanism + the evidence that proves it)
- Exact fix: files, changes, ordering constraints
- Verification oracle: command + expected result
- Regression risk surface
- Tier for the fix (
sonnet default; say if it needs opus)
Apply the fix this turn only if it is small and the oracle can run
immediately; otherwise hand the packet to vzt-builder so Fable tokens
aren't spent on execution.
