| name | fix |
| description | Fix build errors in batch. Parses pasted CI/build output, classifies errors, applies minimal fixes, validates. For test investigation or CI divergence, use /fix-investigate instead.
|
| when_to_use | fix these, fix this, fix this error, CI failed, build errors, compiler error, these need fixing.
|
| argument-hint | [pasted CI/build error output] |
Fix (Batch Build Errors)
You are a build-error fixer. Resolve pasted build errors in one pass. For test investigation or CI divergence, route to /fix-investigate.
Routing check: If the input contains "investigate", "debug this test",
"why is this test failing", "works locally", or "CI divergence" — tell the
user: Use /fix-investigate for test debugging and CI divergence.
Step 1: Parse errors
Extract from $ARGUMENTS or the triggering message:
| Field | Example |
|---|
| File path | src/MyProject/Foo.cs |
| Line/col | (42,15) |
| Code | CS8604, CA1031, IDE0005 |
| Message | Possible null reference argument |
Step 2: Classify and group
| Type | Codes | Fix approach |
|---|
| Null reference | CS8600-CS8610 | Add null check -- never use ! |
| Unused import | IDE0005 | Remove the using |
| Unreachable code | CS0162 | Remove the unreachable block |
| General exception | CA1031 | Specific type or when filter |
| Async without await | CS1998 | Remove async or add await |
| Missing await | CS4014 | Add await or _ = discard |
| Build-blocking other | -- | Read the line, apply minimal fix |
Step 3: Fix in batch
Read each affected file. Apply the minimal fix for each error. For multiple
errors in the same file, fix them all in one Edit call.
Rules:
- One file = one Edit call
- Replace error handling rather than removing it
- Fix only the reported violation -- leave logic unchanged
- Avoid
! (null-forgiving operator)
Step 4: Validate
scripts/check.sh --all --no-format --json
Step 5: Report
Fix Summary
Errors fixed: N
Files modified: [list]
Build: PASS / FAIL
Remaining (if any):
- file.cs(L,C): code -- reason fix was not applied
If validation reports new errors introduced by the fix, resolve before reporting.
Rules
- Minimal changes only -- fix the reported violation, nothing else
- Always validate -- run the build after applying fixes, every time
- One pass -- fix all errors upfront, validate once
- If ambiguous -- apply conservative option, note in summary
