Update post-plan workflow instructions

[lewtun]

Summary

• Document that agents should run checks, commit, open a PR, then start backend and frontend local dev servers after implementing a plan.

Tests

• uv run --frozen --extra dev ruff check .
• uv run --frozen --extra dev ruff format --check .

[github-actions]

Claude finished @lewtun's task in 23s —— View job

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PR Review

LGTM — no blocking issues.

This is a one-line documentation addition to AGENTS.md:36. It's consistent with the surrounding guidance and introduces no code, routing, auth, or agent-loop behavior to review.

• Read the diff (git diff origin/main...HEAD)
• Reviewed AGENTS.md in full context
• Posted review

Notes:

• The new line at AGENTS.md:36 reinforces the existing PR-first rule (AGENTS.md:35) and points to the dev-server commands already documented under "Local Dev Servers" (AGENTS.md:3-9) and the check commands under "Development Checks" (AGENTS.md:20). Coherent and non-contradictory.
• P2 (informational, non-blocking): the instruction places "start the backend and frontend local dev servers" after "open a GitHub PR." In practice testing usually precedes opening the PR. Wording like "run checks, start the dev servers to test, then commit and open a PR" would order the steps more naturally — but this is purely stylistic and not worth blocking on.
  · codex/update-post-plan-workflow