/fstack-build

Implement the approved plan in small steps. Verify each step before moving on. Pause at real choices.

When to use

• An approved PLAN.md exists and the user says to build.
• /fstack routed here because the plan is approved and ready.

Steps

1. Take the first unfinished step from PLAN.md.
2. Implement it with the smallest change that works.
3. Verify it. Run it, run the test, load the page — whatever fits.
4. Report in 2–3 sentences: what changed, how you verified it.
5. Mark the step done in PLAN.md.
6. If the next step involves a real choice — library, API shape, naming that leaks into the public surface — stop and ask before proceeding.
7. Otherwise, continue to the next unfinished step. Repeat from step 1.