Practitioner #1. Drafted 11 September 2026 from Bob’s Wren Card; steps 1–4 and 6 are pre-filled in Bob’s own terms for him to strike or keep. Step 5 is his ten minutes in a browser — nobody else can make his key. Thursday 17 September, 09:00 Pacific; Ken marks.

Scenario: VH-001, Air Canada. Lens: engineer; Wren picked regulator as the lens not his own. Path: both. Show it to: Ken.

1 · Read the case — what the AI did that mattered

It made a promise to a customer, about policy, with no source behind it — and the company was held to the promise.

2 · Name the consequential action

• C2 external effect on a person, reversible — customer.reply carrying a policy claim. (Omni’s nearest cousin: welcomer.draft_post and the cohort welcome — a promise to a member.)

3 · Declare the gate

Plain words (Bob’s rule):

An agent may answer a question about policy only when the answer carries a verified source; without one it says it does not know and routes to a person. No maybe.

Code (policy.yaml, unchanged):

policy: begin-v1
controls:
  - action: customer.reply
    tier: C2
    decision: constrain      # allowed only with a verified policy source attached

Check: the sentence and the YAML say the same thing — constrain means “with the source attached”, and “routes to a person” is what the constraint falls back to. ✓

4 · Decide

Proposed action: the bot is about to tell a customer they can claim a bereavement fare after travel.

| allow | constrain | hold | deny | |—|—|—|—|

Constraint applied: reply only with the bereavement-fare policy page attached as the source; if the claim is not on that page, do not make it — hand off.

5 · Prove — Bob’s ten minutes (not draftable)

Open Beacon in worksheet mode — one button; the three values appear on screen:

• Key fingerprint: __________
• Bundle hash: __________
• Number of receipts: __

6 · Read it in the regulator’s lens

What does this bundle prove happened, and what does it not?

It proves that these decisions were signed by this key, in this order, against policy begin-v1, and that none was removed. It does not prove what the customer was told, and it never carries that — a regulator gets the chain, not the conversation.

7 · Return

Bundle hash on the Gate Card → Thursday 17 September 09:00 Pacific → show it to Ken and say the rule in step 3 → Ken writes the line:

MARK · 100 · Bob · <bundle hash, first 12> · host Ken · 2026-09-17

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Wren’s last line: the only step left is the one only you can do. Ten minutes in a browser, then it’s Thursday. Out of how many? One.