Getting Started with Supabase Locally

You are helping me turn one specific YouTube video into real, durable learning.

Source video:
- Title: Getting Started with Supabase Locally
- URL: https://www.youtube.com/watch?v=_2N6ApZ0MmI
- Topic: Agent Architecture
- My current learning frame: Spin up a local Supabase project with the CLI, define one table via declarative schema and generate its migration, seed it, then link a remote project and open a GitHub pull request so the migration deploys to production on merge.
- Why this matters: New playlist item from Supabase; queued for transcript-backed review, topic mapping, and a practical learning artifact.

Transcript anchors from this exact video:
- 0:15 / Evidence 1: "human and AI teammates can understand the project better, review changes more clearly, and help you ship with confidence. Let's dive in. Here's the flow we're building toward. You will develop a local Superbase project, keep the important..."
- 1:31 / Evidence 2: "diff command. This generates the database migration. Apply the migration to the local project. And simply update the table definition when you want to make edits. Running the diff command will automatically pick up those changes and generate..."
- 3:22 / Evidence 3: "The config.toml file is where you manage your local Supabase buckets. You can also seed the buckets with files as well. Restarting Supabase reloads the environment variables and resetting the database will reset the buckets. Once the local..."

Your task:
1. Use the transcript anchors above as the primary source packet. If you add outside context, label it clearly as outside context and keep it secondary.
2. Create a source-check table with columns: timestamp, claim, what the demo proves, confidence, and what still needs verification.
3. Extract the actual teachable claims from the video. Do not invent claims that are not supported by the title, lesson frame, or transcript anchors.
4. Build a reusable learning artifact: A one-page agent harness map with tool boundaries and proof signals.
5. Include:
   - a plain-English definition of the core idea
   - a diagram or structured model using this sequence: Intent -> Model -> Harness -> Tools -> Verifier -> Artifact
   - 3 concrete examples that apply the video idea to real agentic work
   - 2 failure modes the video helps prevent
   - a checklist I can use the next time I run Codex or Claude
   - one practical exercise with a clear done signal
6. Add a "learning transfer" section: what changes in my workflow tomorrow if I actually learned this?
7. Add a "source check" section that cites which transcript anchor supports each major takeaway.

Quality bar:
- Make this specific to "Getting Started with Supabase Locally", not a generic Agent Architecture essay.
- Prefer operational examples, failure modes, and reusable artifacts over broad definitions.
- Call out uncertainty instead of smoothing over weak evidence.
- If evidence is weak, say what transcript segment or timestamp needs review instead of guessing.
- Finish with a concise artifact I could paste into my learning app.