docs: close leftover D-2 copy; point §5.4 at workflows/chapter-structure.md

AiBook_PRD.md

@@ -161,15 +161,15 @@ post-launch aspiration. Community contribution is **Layer 2** — an experiment
 we've seeded a library worth subscribing to.
 
 ### 5.3 Be honest: v1 is an *authored* book, not yet a *crowd* book
-The prior draft's "contributor economy" pays co-authors **15% affiliate commission** — which
-is a reward for *referring backers*, not for *writing workflows*. Writing a workflow currently
-earns a byline and nothing else. The mechanic that would actually pay contributors — royalties
-— is unresolved (see [D-2](#10-open-decisions)).
+The prior draft's "contributor economy" pays co-authors **15% affiliate commission**, which
+is a reward for *referring backers*, not for *writing workflows*.
 
-So for v1, we state plainly: **the first edition is written by a founding set of co-authors and
-the team.** Open community contribution — with a real incentive attached — is the very next
-thing we build, and its incentive design ([D-2](#10-open-decisions)) is a **launch-blocking
-decision, not a nice-to-have**, because the entire "living book" thesis depends on it.
+**Signed 2026-08-31 (D-2):** founding writers are paid **on contract**. v1 is an authored book.
+Affiliate referral can still pay for referring backers. It is not how writing is paid. Open
+contribution with royalties or bounties waits for Layer 2.
+
+So we state plainly: **the first edition is written by a founding set of co-authors and the
+team.** Layer 2 is the next thing we build, after the library is worth subscribing to.
 
 ---
 
@@ -214,6 +214,9 @@ still the unit of *practice* (and of activation). The chapter is the unit of *re
 - No crypto/Web3 language
 - Nested recipes are not collapsed “click to reveal” cards that hide the Method
 
+**Writing drafts** live in [`workflows/chapter-structure.md`](workflows/chapter-structure.md).
+Copy that blank into a vertical file (`workflows/real-estate.md`, etc.) when a chapter is assigned.
+
 ---
 
 ## 6. Requirements
@@ -425,16 +428,17 @@ changes from the prior draft, and the reasoning:
    funnel are explicitly later layers.
 3. **Elevated the content cold-start** to the #1 risk and added the *Minimum Lovable Library*
    launch gate (§5.2).
-4. **Told the truth about incentives** (§5.3): v1 is an authored book; the "contributor
-   economy" is currently a referral scheme; paid contribution (D-2) is now launch-blocking.
-5. **Forced the subscription-vs-lifetime tension** into a real decision (D-1).
+4. **Told the truth about incentives** (§5.3). **D-2 signed 2026-08-31:** founding writers on
+   contract; v1 authored; royalties wait for Layer 2. Affiliate still pays referrals, not writing.
+5. **Forced the subscription-vs-lifetime tension** into a real decision. **D-1 signed 2026-08-31:**
+   **$47/yr** only. No lifetime SKU as an equal v1 product.
 6. **Split the validation bar from the funding floor** (§8) so a funded-but-dead outcome can't
    hide.
 7. **Reframed the pitch as utility-first** (§4, §9 hook test) — the buyer wants a workflow, not
    an ownership philosophy.
 8. **Demoted governance to proportionate** (Appendix B), keeping only the NFT-scrub and
    truth-in-claims as active gates.
-9. **Turned the domain "decision" into a same-day chore** (§9).
+9. **Turned the domain into a same-day chore** (§9). **Done 2026-08-31:** `aibook.fun` renewed.
 10. **Translated the jargon out.** Internal codes, handles, and merge-history are gone from the
     body; a who's-who / glossary can be maintained separately if the team wants traceability
     back to the source-of-truth IDs.