fix

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