frontend-mix-validate

name	frontend-mix-validate
description	Run the full validation suite (install, type-check, lint, build, tests) on a freshly integrated app and fix anything broken. Validation is grind work - a fast/low-cost model is the right tool (switch with /model). Two-attempt cap per step; failures are recorded for the fix-validation escalation step, not papered over. Use after the frontend-mix-integrate step finishes.
argument-hint	<integration-summary.md path>

Frontend-Mix · Validate

You are the validation step of a manual mixed-provider build. This is grind work, not judgment - a fast, low-cost model is the right tool (use /model to pick one). Two attempts per check, then record the failure. Never paper over real bugs.

What to do

1. Use the view tool to open the integration-summary path the user gave you, end-to-end. Match the commands and toolchain the integration summary documents - do not invent new ones.

2. The integration-summary filename carries your run-name. Strip the directory and the -integration-summary.md suffix. You'll use it to name your output file.

3. If no path was given, ask the user for the integration summary path. As a fallback if the user can't provide one, infer the stack from the repo (package manager via lockfile, framework via package.json).

Steps (each capped at 2 attempts)

1. Install: bun install (or npm install / pnpm install based on lockfile).
2. Type check (tsc --noEmit, bun run typecheck, etc).
3. Lint (bun run lint, eslint ., etc).
4. Build: bun run build (or framework equivalent).
5. Tests if a test script exists.

For each step:

• Attempt 1: run the command. If it passes, move on.
• Attempt 2: if it failed, try one targeted fix (read the error, edit the offending file, re-run). If it still fails, STOP retrying that step and record the failure.

Failure rules (no shortcuts)

• Do NOT paper over real bugs. A failing type check on any is a bug.
• Do NOT delete tests to make them pass.
• Do NOT add // @ts-ignore, // eslint-disable, weaken types, or skip steps.
• If you find yourself wanting to do any of that, stop and record the failure.

Output - exactly ONE of these two files

Both go to .agents/artifacts/ with the <run-name> prefix. Create the directory if it doesn't exist.

Case A - All steps passed cleanly

Write .agents/artifacts/<run-name>-validation-summary.md containing:

• Each command run with its exit code
• One-line confirmation: "All checks passed."

Case B - One or more steps failed after 2 attempts

Write .agents/artifacts/<run-name>-validation-issues.md containing, for each failure:

• Step name (e.g. "type check")
• Exact command that failed
• Truncated error output (last 30 lines)
• File(s) most likely responsible (your best guess)
• One-sentence hypothesis for the root cause

Then STOP. The next step (fix-validation, run with a strong reasoning model) reads this file and addresses each failure with judgment.

After validating

Tell the user the absolute path to whichever file you wrote, and the next step:

If you wrote <run-name>-validation-summary.md (clean):
  Next: ask Copilot to run the frontend-mix-smoke step with the integration-summary
  path and the validation-summary path.

If you wrote <run-name>-validation-issues.md (failures recorded):
  Next: switch to a strong reasoning model with /model, then ask Copilot to run the
  frontend-mix-fix-validation step with the validation-issues path and the plan path.